* [PATCH v3 00/13] ARM: at91: PMC driver rework
@ 2015-12-04 17:03 Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers Alexandre Belloni
` (13 more replies)
0 siblings, 14 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
This patch set is a cleanup that properly separate drivers needing to access the
PMC (PM and USB) from the clock driver by exposing the PMC as a syscon.
This also allows to implement a fix for preempt-rt. Currently, at91 platform are
crashing when using preempt-rt because the irq handler are transformed in
threaded irq handler but at the time the pmc registers its clocks, it is not
possible to creat threads, leading to a NULL pointer dereference in the kernel.
The new infrastructure uses polling until it is late enough to register threaded
irqs.
Note that there is an ugly global spinlock for the peripheral and generated
clocks. More infrastructure is needed in syscon to get rid of that one. We will
be working on that.
Changes in v3:
- rebased on v4.4-rc1 and so included the sama5d2 and the generated clocks
- fixed comments from Wenyou
Alexandre Belloni (10):
clk: at91: clk-main: factorize irq handling
clk: at91: make IRQ optional and register them later
clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
clk: at91: pmc: move pmc structures to C file
ARM: at91: pm: simply call at91_pm_init
ARM: at91: pm: find and remap the pmc
ARM: at91: pm: move idle functions to pm.c
ARM: at91: remove useless includes and function prototypes
usb: gadget: atmel: access the PMC using regmap
clk: at91: pmc: drop at91_pmc_base
Boris Brezillon (3):
clk: at91: make use of syscon to share PMC registers in several
drivers
clk: at91: make use of syscon/regmap internally
clk: at91: only disable available IRQs
arch/arm/mach-at91/Kconfig | 1 +
arch/arm/mach-at91/at91rm9200.c | 2 -
arch/arm/mach-at91/at91sam9.c | 2 -
arch/arm/mach-at91/generic.h | 13 +-
arch/arm/mach-at91/pm.c | 70 +++++-
arch/arm/mach-at91/sama5.c | 2 +-
drivers/clk/at91/clk-generated.c | 95 ++++---
drivers/clk/at91/clk-h32mx.c | 32 ++-
drivers/clk/at91/clk-main.c | 430 ++++++++++++++++++--------------
drivers/clk/at91/clk-master.c | 134 ++++++----
drivers/clk/at91/clk-peripheral.c | 135 +++++-----
drivers/clk/at91/clk-pll.c | 190 +++++++++-----
drivers/clk/at91/clk-plldiv.c | 42 ++--
drivers/clk/at91/clk-programmable.c | 92 ++++---
drivers/clk/at91/clk-slow.c | 27 +-
drivers/clk/at91/clk-smd.c | 54 ++--
drivers/clk/at91/clk-system.c | 129 +++++++---
drivers/clk/at91/clk-usb.c | 121 +++++----
drivers/clk/at91/clk-utmi.c | 116 ++++++---
drivers/clk/at91/pmc.c | 314 +++++------------------
drivers/clk/at91/pmc.h | 96 +------
drivers/usb/gadget/udc/atmel_usba_udc.c | 20 +-
drivers/usb/gadget/udc/atmel_usba_udc.h | 2 +
include/linux/clk/at91_pmc.h | 12 -
24 files changed, 1111 insertions(+), 1020 deletions(-)
--
2.5.0
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 02/13] clk: at91: make use of syscon/regmap internally Alexandre Belloni
` (12 subsequent siblings)
13 siblings, 0 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
From: Boris Brezillon <boris.brezillon@free-electrons.com>
The PMC block is providing several functionnalities:
- system clk management
- cpuidle
- platform suspend
Replace the void __iomem *regs field by a regmap (retrieved using syscon)
so that we can later share the regmap across several drivers without
exporting a new specific API or a global void __iomem * variable.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
---
arch/arm/mach-at91/Kconfig | 1 +
drivers/clk/at91/pmc.c | 12 ++++++++----
drivers/clk/at91/pmc.h | 11 ++++++++---
3 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 92673006e55c..dd1571251ea6 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -95,6 +95,7 @@ config HAVE_AT91_USB_CLK
config COMMON_CLK_AT91
bool
select COMMON_CLK
+ select MFD_SYSCON
config HAVE_AT91_SMD
bool
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 8476b570779b..481146029b2e 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -19,6 +19,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
+#include <linux/mfd/syscon.h>
#include <asm/proc-fns.h>
@@ -223,6 +224,7 @@ static const struct at91_pmc_caps sama5d3_caps = {
};
static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
+ struct regmap *regmap,
void __iomem *regbase, int virq,
const struct at91_pmc_caps *caps)
{
@@ -238,7 +240,7 @@ static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
return NULL;
spin_lock_init(&pmc->lock);
- pmc->regbase = regbase;
+ pmc->regmap = regmap;
pmc->virq = virq;
pmc->caps = caps;
@@ -394,16 +396,18 @@ static void __init of_at91_pmc_setup(struct device_node *np,
void (*clk_setup)(struct device_node *, struct at91_pmc *);
const struct of_device_id *clk_id;
void __iomem *regbase = of_iomap(np, 0);
+ struct regmap *regmap;
int virq;
- if (!regbase)
- return;
+ regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(regmap))
+ panic("Could not retrieve syscon regmap");
virq = irq_of_parse_and_map(np, 0);
if (!virq)
return;
- pmc = at91_pmc_init(np, regbase, virq, caps);
+ pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
if (!pmc)
return;
for_each_child_of_node(np, childnp) {
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index f65739272779..e1fc0b0e1d8c 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -14,6 +14,7 @@
#include <linux/io.h>
#include <linux/irqdomain.h>
+#include <linux/regmap.h>
#include <linux/spinlock.h>
struct clk_range {
@@ -28,7 +29,7 @@ struct at91_pmc_caps {
};
struct at91_pmc {
- void __iomem *regbase;
+ struct regmap *regmap;
int virq;
spinlock_t lock;
const struct at91_pmc_caps *caps;
@@ -48,12 +49,16 @@ static inline void pmc_unlock(struct at91_pmc *pmc)
static inline u32 pmc_read(struct at91_pmc *pmc, int offset)
{
- return readl(pmc->regbase + offset);
+ unsigned int ret = 0;
+
+ regmap_read(pmc->regmap, offset, &ret);
+
+ return ret;
}
static inline void pmc_write(struct at91_pmc *pmc, int offset, u32 value)
{
- writel(value, pmc->regbase + offset);
+ regmap_write(pmc->regmap, offset, value);
}
int of_at91_get_clk_range(struct device_node *np, const char *propname,
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 02/13] clk: at91: make use of syscon/regmap internally
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:10 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling Alexandre Belloni
` (11 subsequent siblings)
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Use the regmap coming from syscon to access the registers instead of using
pmc_read/pmc_write. This allows to avoid passing the at91_pmc structure to
the child nodes of the PMC.
The final benefit is to have each clock register itself instead of having
to iterate over the children.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/clk-generated.c | 95 ++++++++------
drivers/clk/at91/clk-h32mx.c | 32 +++--
drivers/clk/at91/clk-main.c | 248 +++++++++++++++++++++++-------------
drivers/clk/at91/clk-master.c | 68 ++++++----
drivers/clk/at91/clk-peripheral.c | 135 ++++++++++++--------
drivers/clk/at91/clk-pll.c | 119 ++++++++++-------
drivers/clk/at91/clk-plldiv.c | 42 +++---
drivers/clk/at91/clk-programmable.c | 92 +++++++------
drivers/clk/at91/clk-slow.c | 27 ++--
drivers/clk/at91/clk-smd.c | 54 ++++----
drivers/clk/at91/clk-system.c | 60 +++++----
drivers/clk/at91/clk-usb.c | 121 ++++++++++--------
drivers/clk/at91/clk-utmi.c | 53 ++++----
drivers/clk/at91/pmc.c | 155 ++--------------------
drivers/clk/at91/pmc.h | 87 -------------
15 files changed, 694 insertions(+), 694 deletions(-)
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index abc80949e1dd..0b9e0aeef346 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -17,9 +17,13 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
+extern spinlock_t pmc_pcr_lock;
+
#define PERIPHERAL_MAX 64
#define PERIPHERAL_ID_MIN 2
@@ -28,8 +32,9 @@
struct clk_generated {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
struct clk_range range;
+ spinlock_t *lock;
u32 id;
u32 gckdiv;
u8 parent_id;
@@ -41,49 +46,52 @@ struct clk_generated {
static int clk_generated_enable(struct clk_hw *hw)
{
struct clk_generated *gck = to_clk_generated(hw);
- struct at91_pmc *pmc = gck->pmc;
- u32 tmp;
+ unsigned long flags;
pr_debug("GCLK: %s, gckdiv = %d, parent id = %d\n",
__func__, gck->gckdiv, gck->parent_id);
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
- tmp = pmc_read(pmc, AT91_PMC_PCR) &
- ~(AT91_PMC_PCR_GCKDIV_MASK | AT91_PMC_PCR_GCKCSS_MASK);
- pmc_write(pmc, AT91_PMC_PCR, tmp | AT91_PMC_PCR_GCKCSS(gck->parent_id)
- | AT91_PMC_PCR_CMD
- | AT91_PMC_PCR_GCKDIV(gck->gckdiv)
- | AT91_PMC_PCR_GCKEN);
- pmc_unlock(pmc);
+ spin_lock_irqsave(gck->lock, flags);
+ regmap_write(gck->regmap, AT91_PMC_PCR,
+ (gck->id & AT91_PMC_PCR_PID_MASK));
+ regmap_update_bits(gck->regmap, AT91_PMC_PCR,
+ AT91_PMC_PCR_GCKDIV_MASK | AT91_PMC_PCR_GCKCSS_MASK |
+ AT91_PMC_PCR_CMD | AT91_PMC_PCR_GCKEN,
+ AT91_PMC_PCR_GCKCSS(gck->parent_id) |
+ AT91_PMC_PCR_CMD |
+ AT91_PMC_PCR_GCKDIV(gck->gckdiv) |
+ AT91_PMC_PCR_GCKEN);
+ spin_unlock_irqrestore(gck->lock, flags);
return 0;
}
static void clk_generated_disable(struct clk_hw *hw)
{
struct clk_generated *gck = to_clk_generated(hw);
- struct at91_pmc *pmc = gck->pmc;
- u32 tmp;
-
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
- tmp = pmc_read(pmc, AT91_PMC_PCR) & ~AT91_PMC_PCR_GCKEN;
- pmc_write(pmc, AT91_PMC_PCR, tmp | AT91_PMC_PCR_CMD);
- pmc_unlock(pmc);
+ unsigned long flags;
+
+ spin_lock_irqsave(gck->lock, flags);
+ regmap_write(gck->regmap, AT91_PMC_PCR,
+ (gck->id & AT91_PMC_PCR_PID_MASK));
+ regmap_update_bits(gck->regmap, AT91_PMC_PCR,
+ AT91_PMC_PCR_CMD | AT91_PMC_PCR_GCKEN,
+ AT91_PMC_PCR_CMD);
+ spin_unlock_irqrestore(gck->lock, flags);
}
static int clk_generated_is_enabled(struct clk_hw *hw)
{
struct clk_generated *gck = to_clk_generated(hw);
- struct at91_pmc *pmc = gck->pmc;
- int ret;
+ unsigned long flags;
+ unsigned int status;
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
- ret = !!(pmc_read(pmc, AT91_PMC_PCR) & AT91_PMC_PCR_GCKEN);
- pmc_unlock(pmc);
+ spin_lock_irqsave(gck->lock, flags);
+ regmap_write(gck->regmap, AT91_PMC_PCR,
+ (gck->id & AT91_PMC_PCR_PID_MASK));
+ regmap_read(gck->regmap, AT91_PMC_PCR, &status);
+ spin_unlock_irqrestore(gck->lock, flags);
- return ret;
+ return status & AT91_PMC_PCR_GCKEN ? 1 : 0;
}
static unsigned long
@@ -214,13 +222,14 @@ static const struct clk_ops generated_ops = {
*/
static void clk_generated_startup(struct clk_generated *gck)
{
- struct at91_pmc *pmc = gck->pmc;
u32 tmp;
+ unsigned long flags;
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (gck->id & AT91_PMC_PCR_PID_MASK));
- tmp = pmc_read(pmc, AT91_PMC_PCR);
- pmc_unlock(pmc);
+ spin_lock_irqsave(gck->lock, flags);
+ regmap_write(gck->regmap, AT91_PMC_PCR,
+ (gck->id & AT91_PMC_PCR_PID_MASK));
+ regmap_read(gck->regmap, AT91_PMC_PCR, &tmp);
+ spin_unlock_irqrestore(gck->lock, flags);
gck->parent_id = (tmp & AT91_PMC_PCR_GCKCSS_MASK)
>> AT91_PMC_PCR_GCKCSS_OFFSET;
@@ -229,8 +238,8 @@ static void clk_generated_startup(struct clk_generated *gck)
}
static struct clk * __init
-at91_clk_register_generated(struct at91_pmc *pmc, const char *name,
- const char **parent_names, u8 num_parents,
+at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock, const char
+ *name, const char **parent_names, u8 num_parents,
u8 id, const struct clk_range *range)
{
struct clk_generated *gck;
@@ -249,7 +258,8 @@ at91_clk_register_generated(struct at91_pmc *pmc, const char *name,
gck->id = id;
gck->hw.init = &init;
- gck->pmc = pmc;
+ gck->regmap = regmap;
+ gck->lock = lock;
gck->range = *range;
clk = clk_register(NULL, &gck->hw);
@@ -261,8 +271,7 @@ at91_clk_register_generated(struct at91_pmc *pmc, const char *name,
return clk;
}
-void __init of_sama5d2_clk_generated_setup(struct device_node *np,
- struct at91_pmc *pmc)
+void __init of_sama5d2_clk_generated_setup(struct device_node *np)
{
int num;
u32 id;
@@ -272,6 +281,7 @@ void __init of_sama5d2_clk_generated_setup(struct device_node *np,
const char *parent_names[GENERATED_SOURCE_MAX];
struct device_node *gcknp;
struct clk_range range = CLK_RANGE(0, 0);
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents <= 0 || num_parents > GENERATED_SOURCE_MAX)
@@ -283,6 +293,10 @@ void __init of_sama5d2_clk_generated_setup(struct device_node *np,
if (!num || num > PERIPHERAL_MAX)
return;
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
for_each_child_of_node(np, gcknp) {
if (of_property_read_u32(gcknp, "reg", &id))
continue;
@@ -296,11 +310,14 @@ void __init of_sama5d2_clk_generated_setup(struct device_node *np,
of_at91_get_clk_range(gcknp, "atmel,clk-output-range",
&range);
- clk = at91_clk_register_generated(pmc, name, parent_names,
- num_parents, id, &range);
+ clk = at91_clk_register_generated(regmap, &pmc_pcr_lock, name,
+ parent_names, num_parents,
+ id, &range);
if (IS_ERR(clk))
continue;
of_clk_add_provider(gcknp, of_clk_src_simple_get, clk);
}
}
+CLK_OF_DECLARE(of_sama5d2_clk_generated_setup, "atmel,sama5d2-clk-generated",
+ of_sama5d2_clk_generated_setup);
diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 61566bcefa53..3fd59b129f92 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -24,6 +24,8 @@
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
#include "pmc.h"
@@ -31,7 +33,7 @@
struct clk_sama5d4_h32mx {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
};
#define to_clk_sama5d4_h32mx(hw) container_of(hw, struct clk_sama5d4_h32mx, hw)
@@ -40,8 +42,10 @@ static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw);
+ unsigned int mckr;
- if (pmc_read(h32mxclk->pmc, AT91_PMC_MCKR) & AT91_PMC_H32MXDIV)
+ regmap_read(h32mxclk->regmap, AT91_PMC_MCKR, &mckr);
+ if (mckr & AT91_PMC_H32MXDIV)
return parent_rate / 2;
if (parent_rate > H32MX_MAX_FREQ)
@@ -70,18 +74,16 @@ static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw);
- struct at91_pmc *pmc = h32mxclk->pmc;
- u32 tmp;
+ u32 mckr = 0;
if (parent_rate != rate && (parent_rate / 2) != rate)
return -EINVAL;
- pmc_lock(pmc);
- tmp = pmc_read(pmc, AT91_PMC_MCKR) & ~AT91_PMC_H32MXDIV;
if ((parent_rate / 2) == rate)
- tmp |= AT91_PMC_H32MXDIV;
- pmc_write(pmc, AT91_PMC_MCKR, tmp);
- pmc_unlock(pmc);
+ mckr = AT91_PMC_H32MXDIV;
+
+ regmap_update_bits(h32mxclk->regmap, AT91_PMC_MCKR,
+ AT91_PMC_H32MXDIV, mckr);
return 0;
}
@@ -92,14 +94,18 @@ static const struct clk_ops h32mx_ops = {
.set_rate = clk_sama5d4_h32mx_set_rate,
};
-void __init of_sama5d4_clk_h32mx_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_sama5d4_clk_h32mx_setup(struct device_node *np)
{
struct clk_sama5d4_h32mx *h32mxclk;
struct clk_init_data init;
const char *parent_name;
+ struct regmap *regmap;
struct clk *clk;
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
h32mxclk = kzalloc(sizeof(*h32mxclk), GFP_KERNEL);
if (!h32mxclk)
return;
@@ -113,7 +119,7 @@ void __init of_sama5d4_clk_h32mx_setup(struct device_node *np,
init.flags = CLK_SET_RATE_GATE;
h32mxclk->hw.init = &init;
- h32mxclk->pmc = pmc;
+ h32mxclk->regmap = regmap;
clk = clk_register(NULL, &h32mxclk->hw);
if (!clk) {
@@ -123,3 +129,5 @@ void __init of_sama5d4_clk_h32mx_setup(struct device_node *np,
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(of_sama5d4_clk_h32mx_setup, "atmel,sama5d4-clk-h32mx",
+ of_sama5d4_clk_h32mx_setup);
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index fd7247deabdc..c1f119748bdc 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -18,6 +18,8 @@
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/wait.h>
@@ -34,7 +36,7 @@
struct clk_main_osc {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
};
@@ -43,7 +45,7 @@ struct clk_main_osc {
struct clk_main_rc_osc {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
unsigned long frequency;
@@ -54,14 +56,14 @@ struct clk_main_rc_osc {
struct clk_rm9200_main {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
};
#define to_clk_rm9200_main(hw) container_of(hw, struct clk_rm9200_main, hw)
struct clk_sam9x5_main {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
u8 parent;
@@ -79,25 +81,36 @@ static irqreturn_t clk_main_osc_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static inline bool clk_main_osc_ready(struct regmap *regmap)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_MOSCS;
+}
+
static int clk_main_osc_prepare(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct at91_pmc *pmc = osc->pmc;
+ struct regmap *regmap = osc->regmap;
u32 tmp;
- tmp = pmc_read(pmc, AT91_CKGR_MOR) & ~MOR_KEY_MASK;
+ regmap_read(regmap, AT91_CKGR_MOR, &tmp);
+ tmp &= ~MOR_KEY_MASK;
+
if (tmp & AT91_PMC_OSCBYPASS)
return 0;
if (!(tmp & AT91_PMC_MOSCEN)) {
tmp |= AT91_PMC_MOSCEN | AT91_PMC_KEY;
- pmc_write(pmc, AT91_CKGR_MOR, tmp);
+ regmap_write(regmap, AT91_CKGR_MOR, tmp);
}
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCS)) {
+ while (!clk_main_osc_ready(regmap)) {
enable_irq(osc->irq);
wait_event(osc->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCS);
+ clk_main_osc_ready(regmap));
}
return 0;
@@ -106,9 +119,10 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
static void clk_main_osc_unprepare(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct at91_pmc *pmc = osc->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_MOR);
+ struct regmap *regmap = osc->regmap;
+ u32 tmp;
+ regmap_read(regmap, AT91_CKGR_MOR, &tmp);
if (tmp & AT91_PMC_OSCBYPASS)
return;
@@ -116,20 +130,22 @@ static void clk_main_osc_unprepare(struct clk_hw *hw)
return;
tmp &= ~(AT91_PMC_KEY | AT91_PMC_MOSCEN);
- pmc_write(pmc, AT91_CKGR_MOR, tmp | AT91_PMC_KEY);
+ regmap_write(regmap, AT91_CKGR_MOR, tmp | AT91_PMC_KEY);
}
static int clk_main_osc_is_prepared(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct at91_pmc *pmc = osc->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_MOR);
+ struct regmap *regmap = osc->regmap;
+ u32 tmp, status;
+ regmap_read(regmap, AT91_CKGR_MOR, &tmp);
if (tmp & AT91_PMC_OSCBYPASS)
return 1;
- return !!((pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCS) &&
- (pmc_read(pmc, AT91_CKGR_MOR) & AT91_PMC_MOSCEN));
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return (status & AT91_PMC_MOSCS) && (tmp & AT91_PMC_MOSCEN);
}
static const struct clk_ops main_osc_ops = {
@@ -139,7 +155,7 @@ static const struct clk_ops main_osc_ops = {
};
static struct clk * __init
-at91_clk_register_main_osc(struct at91_pmc *pmc,
+at91_clk_register_main_osc(struct regmap *regmap,
unsigned int irq,
const char *name,
const char *parent_name,
@@ -150,7 +166,7 @@ at91_clk_register_main_osc(struct at91_pmc *pmc,
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !irq || !name || !parent_name)
+ if (!irq || !name || !parent_name)
return ERR_PTR(-EINVAL);
osc = kzalloc(sizeof(*osc), GFP_KERNEL);
@@ -164,7 +180,7 @@ at91_clk_register_main_osc(struct at91_pmc *pmc,
init.flags = CLK_IGNORE_UNUSED;
osc->hw.init = &init;
- osc->pmc = pmc;
+ osc->regmap = regmap;
osc->irq = irq;
init_waitqueue_head(&osc->wait);
@@ -177,10 +193,10 @@ at91_clk_register_main_osc(struct at91_pmc *pmc,
}
if (bypass)
- pmc_write(pmc, AT91_CKGR_MOR,
- (pmc_read(pmc, AT91_CKGR_MOR) &
- ~(MOR_KEY_MASK | AT91_PMC_MOSCEN)) |
- AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
+ regmap_update_bits(regmap,
+ AT91_CKGR_MOR, MOR_KEY_MASK |
+ AT91_PMC_MOSCEN,
+ AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
clk = clk_register(NULL, &osc->hw);
if (IS_ERR(clk)) {
@@ -191,29 +207,35 @@ at91_clk_register_main_osc(struct at91_pmc *pmc,
return clk;
}
-void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
{
struct clk *clk;
unsigned int irq;
const char *name = np->name;
const char *parent_name;
+ struct regmap *regmap;
bool bypass;
of_property_read_string(np, "clock-output-names", &name);
bypass = of_property_read_bool(np, "atmel,osc-bypass");
parent_name = of_clk_get_parent_name(np, 0);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
irq = irq_of_parse_and_map(np, 0);
if (!irq)
return;
- clk = at91_clk_register_main_osc(pmc, irq, name, parent_name, bypass);
+ clk = at91_clk_register_main_osc(regmap, irq, name, parent_name, bypass);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91rm9200_clk_main_osc, "atmel,at91rm9200-clk-main-osc",
+ of_at91rm9200_clk_main_osc_setup);
static irqreturn_t clk_main_rc_osc_irq_handler(int irq, void *dev_id)
{
@@ -225,23 +247,32 @@ static irqreturn_t clk_main_rc_osc_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static bool clk_main_rc_osc_ready(struct regmap *regmap)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_MOSCRCS;
+}
+
static int clk_main_rc_osc_prepare(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct at91_pmc *pmc = osc->pmc;
- u32 tmp;
+ struct regmap *regmap = osc->regmap;
+ unsigned int mor;
- tmp = pmc_read(pmc, AT91_CKGR_MOR) & ~MOR_KEY_MASK;
+ regmap_read(regmap, AT91_CKGR_MOR, &mor);
- if (!(tmp & AT91_PMC_MOSCRCEN)) {
- tmp |= AT91_PMC_MOSCRCEN | AT91_PMC_KEY;
- pmc_write(pmc, AT91_CKGR_MOR, tmp);
- }
+ if (!(mor & AT91_PMC_MOSCRCEN))
+ regmap_update_bits(regmap, AT91_CKGR_MOR,
+ MOR_KEY_MASK | AT91_PMC_MOSCRCEN,
+ AT91_PMC_MOSCRCEN | AT91_PMC_KEY);
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCRCS)) {
+ while (!clk_main_rc_osc_ready(regmap)) {
enable_irq(osc->irq);
wait_event(osc->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCRCS);
+ clk_main_rc_osc_ready(regmap));
}
return 0;
@@ -250,23 +281,28 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
static void clk_main_rc_osc_unprepare(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct at91_pmc *pmc = osc->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_MOR);
+ struct regmap *regmap = osc->regmap;
+ unsigned int mor;
- if (!(tmp & AT91_PMC_MOSCRCEN))
+ regmap_read(regmap, AT91_CKGR_MOR, &mor);
+
+ if (!(mor & AT91_PMC_MOSCRCEN))
return;
- tmp &= ~(MOR_KEY_MASK | AT91_PMC_MOSCRCEN);
- pmc_write(pmc, AT91_CKGR_MOR, tmp | AT91_PMC_KEY);
+ regmap_update_bits(regmap, AT91_CKGR_MOR,
+ MOR_KEY_MASK | AT91_PMC_MOSCRCEN, AT91_PMC_KEY);
}
static int clk_main_rc_osc_is_prepared(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct at91_pmc *pmc = osc->pmc;
+ struct regmap *regmap = osc->regmap;
+ unsigned int mor, status;
+
+ regmap_read(regmap, AT91_CKGR_MOR, &mor);
+ regmap_read(regmap, AT91_PMC_SR, &status);
- return !!((pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCRCS) &&
- (pmc_read(pmc, AT91_CKGR_MOR) & AT91_PMC_MOSCRCEN));
+ return (mor & AT91_PMC_MOSCRCEN) && (status & AT91_PMC_MOSCRCS);
}
static unsigned long clk_main_rc_osc_recalc_rate(struct clk_hw *hw,
@@ -294,7 +330,7 @@ static const struct clk_ops main_rc_osc_ops = {
};
static struct clk * __init
-at91_clk_register_main_rc_osc(struct at91_pmc *pmc,
+at91_clk_register_main_rc_osc(struct regmap *regmap,
unsigned int irq,
const char *name,
u32 frequency, u32 accuracy)
@@ -304,7 +340,7 @@ at91_clk_register_main_rc_osc(struct at91_pmc *pmc,
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !irq || !name || !frequency)
+ if (!name || !frequency)
return ERR_PTR(-EINVAL);
osc = kzalloc(sizeof(*osc), GFP_KERNEL);
@@ -318,7 +354,7 @@ at91_clk_register_main_rc_osc(struct at91_pmc *pmc,
init.flags = CLK_IS_ROOT | CLK_IGNORE_UNUSED;
osc->hw.init = &init;
- osc->pmc = pmc;
+ osc->regmap = regmap;
osc->irq = irq;
osc->frequency = frequency;
osc->accuracy = accuracy;
@@ -339,14 +375,14 @@ at91_clk_register_main_rc_osc(struct at91_pmc *pmc,
return clk;
}
-void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np)
{
struct clk *clk;
unsigned int irq;
u32 frequency = 0;
u32 accuracy = 0;
const char *name = np->name;
+ struct regmap *regmap;
of_property_read_string(np, "clock-output-names", &name);
of_property_read_u32(np, "clock-frequency", &frequency);
@@ -356,25 +392,31 @@ void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np,
if (!irq)
return;
- clk = at91_clk_register_main_rc_osc(pmc, irq, name, frequency,
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91_clk_register_main_rc_osc(regmap, irq, name, frequency,
accuracy);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91sam9x5_clk_main_rc_osc, "atmel,at91sam9x5-clk-main-rc-osc",
+ of_at91sam9x5_clk_main_rc_osc_setup);
-static int clk_main_probe_frequency(struct at91_pmc *pmc)
+static int clk_main_probe_frequency(struct regmap *regmap)
{
unsigned long prep_time, timeout;
- u32 tmp;
+ unsigned int mcfr;
timeout = jiffies + usecs_to_jiffies(MAINFRDY_TIMEOUT);
do {
prep_time = jiffies;
- tmp = pmc_read(pmc, AT91_CKGR_MCFR);
- if (tmp & AT91_PMC_MAINRDY)
+ regmap_read(regmap, AT91_CKGR_MCFR, &mcfr);
+ if (mcfr & AT91_PMC_MAINRDY)
return 0;
usleep_range(MAINF_LOOP_MIN_WAIT, MAINF_LOOP_MAX_WAIT);
} while (time_before(prep_time, timeout));
@@ -382,34 +424,37 @@ static int clk_main_probe_frequency(struct at91_pmc *pmc)
return -ETIMEDOUT;
}
-static unsigned long clk_main_recalc_rate(struct at91_pmc *pmc,
+static unsigned long clk_main_recalc_rate(struct regmap *regmap,
unsigned long parent_rate)
{
- u32 tmp;
+ unsigned int mcfr;
if (parent_rate)
return parent_rate;
pr_warn("Main crystal frequency not set, using approximate value\n");
- tmp = pmc_read(pmc, AT91_CKGR_MCFR);
- if (!(tmp & AT91_PMC_MAINRDY))
+ regmap_read(regmap, AT91_CKGR_MCFR, &mcfr);
+ if (!(mcfr & AT91_PMC_MAINRDY))
return 0;
- return ((tmp & AT91_PMC_MAINF) * SLOW_CLOCK_FREQ) / MAINF_DIV;
+ return ((mcfr & AT91_PMC_MAINF) * SLOW_CLOCK_FREQ) / MAINF_DIV;
}
static int clk_rm9200_main_prepare(struct clk_hw *hw)
{
struct clk_rm9200_main *clkmain = to_clk_rm9200_main(hw);
- return clk_main_probe_frequency(clkmain->pmc);
+ return clk_main_probe_frequency(clkmain->regmap);
}
static int clk_rm9200_main_is_prepared(struct clk_hw *hw)
{
struct clk_rm9200_main *clkmain = to_clk_rm9200_main(hw);
+ unsigned int status;
+
+ regmap_read(clkmain->regmap, AT91_CKGR_MCFR, &status);
- return !!(pmc_read(clkmain->pmc, AT91_CKGR_MCFR) & AT91_PMC_MAINRDY);
+ return status & AT91_PMC_MAINRDY ? 1 : 0;
}
static unsigned long clk_rm9200_main_recalc_rate(struct clk_hw *hw,
@@ -417,7 +462,7 @@ static unsigned long clk_rm9200_main_recalc_rate(struct clk_hw *hw,
{
struct clk_rm9200_main *clkmain = to_clk_rm9200_main(hw);
- return clk_main_recalc_rate(clkmain->pmc, parent_rate);
+ return clk_main_recalc_rate(clkmain->regmap, parent_rate);
}
static const struct clk_ops rm9200_main_ops = {
@@ -427,7 +472,7 @@ static const struct clk_ops rm9200_main_ops = {
};
static struct clk * __init
-at91_clk_register_rm9200_main(struct at91_pmc *pmc,
+at91_clk_register_rm9200_main(struct regmap *regmap,
const char *name,
const char *parent_name)
{
@@ -435,7 +480,7 @@ at91_clk_register_rm9200_main(struct at91_pmc *pmc,
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !name)
+ if (!name)
return ERR_PTR(-EINVAL);
if (!parent_name)
@@ -452,7 +497,7 @@ at91_clk_register_rm9200_main(struct at91_pmc *pmc,
init.flags = 0;
clkmain->hw.init = &init;
- clkmain->pmc = pmc;
+ clkmain->regmap = regmap;
clk = clk_register(NULL, &clkmain->hw);
if (IS_ERR(clk))
@@ -461,22 +506,28 @@ at91_clk_register_rm9200_main(struct at91_pmc *pmc,
return clk;
}
-void __init of_at91rm9200_clk_main_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_main_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_name;
const char *name = np->name;
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
of_property_read_string(np, "clock-output-names", &name);
- clk = at91_clk_register_rm9200_main(pmc, name, parent_name);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91_clk_register_rm9200_main(regmap, name, parent_name);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91rm9200_clk_main, "atmel,at91rm9200-clk-main",
+ of_at91rm9200_clk_main_setup);
static irqreturn_t clk_sam9x5_main_irq_handler(int irq, void *dev_id)
{
@@ -488,25 +539,34 @@ static irqreturn_t clk_sam9x5_main_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static inline bool clk_sam9x5_main_ready(struct regmap *regmap)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_MOSCSELS ? 1 : 0;
+}
+
static int clk_sam9x5_main_prepare(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- struct at91_pmc *pmc = clkmain->pmc;
+ struct regmap *regmap = clkmain->regmap;
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCSELS)) {
+ while (!clk_sam9x5_main_ready(regmap)) {
enable_irq(clkmain->irq);
wait_event(clkmain->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCSELS);
+ clk_sam9x5_main_ready(regmap));
}
- return clk_main_probe_frequency(pmc);
+ return clk_main_probe_frequency(regmap);
}
static int clk_sam9x5_main_is_prepared(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- return !!(pmc_read(clkmain->pmc, AT91_PMC_SR) & AT91_PMC_MOSCSELS);
+ return clk_sam9x5_main_ready(clkmain->regmap);
}
static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw,
@@ -514,29 +574,30 @@ static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw,
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- return clk_main_recalc_rate(clkmain->pmc, parent_rate);
+ return clk_main_recalc_rate(clkmain->regmap, parent_rate);
}
static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- struct at91_pmc *pmc = clkmain->pmc;
- u32 tmp;
+ struct regmap *regmap = clkmain->regmap;
+ unsigned int tmp;
if (index > 1)
return -EINVAL;
- tmp = pmc_read(pmc, AT91_CKGR_MOR) & ~MOR_KEY_MASK;
+ regmap_read(regmap, AT91_CKGR_MOR, &tmp);
+ tmp &= ~MOR_KEY_MASK;
if (index && !(tmp & AT91_PMC_MOSCSEL))
- pmc_write(pmc, AT91_CKGR_MOR, tmp | AT91_PMC_MOSCSEL);
+ regmap_write(regmap, AT91_CKGR_MOR, tmp | AT91_PMC_MOSCSEL);
else if (!index && (tmp & AT91_PMC_MOSCSEL))
- pmc_write(pmc, AT91_CKGR_MOR, tmp & ~AT91_PMC_MOSCSEL);
+ regmap_write(regmap, AT91_CKGR_MOR, tmp & ~AT91_PMC_MOSCSEL);
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCSELS)) {
+ while (!clk_sam9x5_main_ready(regmap)) {
enable_irq(clkmain->irq);
wait_event(clkmain->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MOSCSELS);
+ clk_sam9x5_main_ready(regmap));
}
return 0;
@@ -545,8 +606,11 @@ static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
+ unsigned int status;
- return !!(pmc_read(clkmain->pmc, AT91_CKGR_MOR) & AT91_PMC_MOSCEN);
+ regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status);
+
+ return status & AT91_PMC_MOSCEN ? 1 : 0;
}
static const struct clk_ops sam9x5_main_ops = {
@@ -558,7 +622,7 @@ static const struct clk_ops sam9x5_main_ops = {
};
static struct clk * __init
-at91_clk_register_sam9x5_main(struct at91_pmc *pmc,
+at91_clk_register_sam9x5_main(struct regmap *regmap,
unsigned int irq,
const char *name,
const char **parent_names,
@@ -568,8 +632,9 @@ at91_clk_register_sam9x5_main(struct at91_pmc *pmc,
struct clk_sam9x5_main *clkmain;
struct clk *clk = NULL;
struct clk_init_data init;
+ unsigned int status;
- if (!pmc || !irq || !name)
+ if (!name)
return ERR_PTR(-EINVAL);
if (!parent_names || !num_parents)
@@ -586,10 +651,10 @@ at91_clk_register_sam9x5_main(struct at91_pmc *pmc,
init.flags = CLK_SET_PARENT_GATE;
clkmain->hw.init = &init;
- clkmain->pmc = pmc;
+ clkmain->regmap = regmap;
clkmain->irq = irq;
- clkmain->parent = !!(pmc_read(clkmain->pmc, AT91_CKGR_MOR) &
- AT91_PMC_MOSCEN);
+ regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status);
+ clkmain->parent = status & AT91_PMC_MOSCEN ? 1 : 0;
init_waitqueue_head(&clkmain->wait);
irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
ret = request_irq(clkmain->irq, clk_sam9x5_main_irq_handler,
@@ -606,20 +671,23 @@ at91_clk_register_sam9x5_main(struct at91_pmc *pmc,
return clk;
}
-void __init of_at91sam9x5_clk_main_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_names[2];
int num_parents;
unsigned int irq;
const char *name = np->name;
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents <= 0 || num_parents > 2)
return;
of_clk_parent_fill(np, parent_names, num_parents);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
of_property_read_string(np, "clock-output-names", &name);
@@ -627,10 +695,12 @@ void __init of_at91sam9x5_clk_main_setup(struct device_node *np,
if (!irq)
return;
- clk = at91_clk_register_sam9x5_main(pmc, irq, name, parent_names,
+ clk = at91_clk_register_sam9x5_main(regmap, irq, name, parent_names,
num_parents);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91sam9x5_clk_main, "atmel,at91sam9x5-clk-main",
+ of_at91sam9x5_clk_main_setup);
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
index 620ea323356b..8d94ddfc9c72 100644
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -19,6 +19,8 @@
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -44,7 +46,7 @@ struct clk_master_layout {
struct clk_master {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
const struct clk_master_layout *layout;
@@ -60,15 +62,24 @@ static irqreturn_t clk_master_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+
+static inline bool clk_master_ready(struct regmap *regmap)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_MCKRDY ? 1 : 0;
+}
+
static int clk_master_prepare(struct clk_hw *hw)
{
struct clk_master *master = to_clk_master(hw);
- struct at91_pmc *pmc = master->pmc;
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MCKRDY)) {
+ while (!clk_master_ready(master->regmap)) {
enable_irq(master->irq);
wait_event(master->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_MCKRDY);
+ clk_master_ready(master->regmap));
}
return 0;
@@ -78,7 +89,7 @@ static int clk_master_is_prepared(struct clk_hw *hw)
{
struct clk_master *master = to_clk_master(hw);
- return !!(pmc_read(master->pmc, AT91_PMC_SR) & AT91_PMC_MCKRDY);
+ return clk_master_ready(master->regmap);
}
static unsigned long clk_master_recalc_rate(struct clk_hw *hw,
@@ -88,18 +99,16 @@ static unsigned long clk_master_recalc_rate(struct clk_hw *hw,
u8 div;
unsigned long rate = parent_rate;
struct clk_master *master = to_clk_master(hw);
- struct at91_pmc *pmc = master->pmc;
const struct clk_master_layout *layout = master->layout;
const struct clk_master_characteristics *characteristics =
master->characteristics;
- u32 tmp;
+ unsigned int mckr;
- pmc_lock(pmc);
- tmp = pmc_read(pmc, AT91_PMC_MCKR) & layout->mask;
- pmc_unlock(pmc);
+ regmap_read(master->regmap, AT91_PMC_MCKR, &mckr);
+ mckr &= layout->mask;
- pres = (tmp >> layout->pres_shift) & MASTER_PRES_MASK;
- div = (tmp >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK;
+ pres = (mckr >> layout->pres_shift) & MASTER_PRES_MASK;
+ div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK;
if (characteristics->have_div3_pres && pres == MASTER_PRES_MAX)
rate /= 3;
@@ -119,9 +128,11 @@ static unsigned long clk_master_recalc_rate(struct clk_hw *hw,
static u8 clk_master_get_parent(struct clk_hw *hw)
{
struct clk_master *master = to_clk_master(hw);
- struct at91_pmc *pmc = master->pmc;
+ unsigned int mckr;
+
+ regmap_read(master->regmap, AT91_PMC_MCKR, &mckr);
- return pmc_read(pmc, AT91_PMC_MCKR) & AT91_PMC_CSS;
+ return mckr & AT91_PMC_CSS;
}
static const struct clk_ops master_ops = {
@@ -132,7 +143,7 @@ static const struct clk_ops master_ops = {
};
static struct clk * __init
-at91_clk_register_master(struct at91_pmc *pmc, unsigned int irq,
+at91_clk_register_master(struct regmap *regmap, unsigned int irq,
const char *name, int num_parents,
const char **parent_names,
const struct clk_master_layout *layout,
@@ -143,7 +154,7 @@ at91_clk_register_master(struct at91_pmc *pmc, unsigned int irq,
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !irq || !name || !num_parents || !parent_names)
+ if (!name || !num_parents || !parent_names)
return ERR_PTR(-EINVAL);
master = kzalloc(sizeof(*master), GFP_KERNEL);
@@ -159,7 +170,7 @@ at91_clk_register_master(struct at91_pmc *pmc, unsigned int irq,
master->hw.init = &init;
master->layout = layout;
master->characteristics = characteristics;
- master->pmc = pmc;
+ master->regmap = regmap;
master->irq = irq;
init_waitqueue_head(&master->wait);
irq_set_status_flags(master->irq, IRQ_NOAUTOEN);
@@ -217,7 +228,7 @@ out_free_characteristics:
}
static void __init
-of_at91_clk_master_setup(struct device_node *np, struct at91_pmc *pmc,
+of_at91_clk_master_setup(struct device_node *np,
const struct clk_master_layout *layout)
{
struct clk *clk;
@@ -226,6 +237,7 @@ of_at91_clk_master_setup(struct device_node *np, struct at91_pmc *pmc,
const char *parent_names[MASTER_SOURCE_MAX];
const char *name = np->name;
struct clk_master_characteristics *characteristics;
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents <= 0 || num_parents > MASTER_SOURCE_MAX)
@@ -239,11 +251,15 @@ of_at91_clk_master_setup(struct device_node *np, struct at91_pmc *pmc,
if (!characteristics)
return;
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
irq = irq_of_parse_and_map(np, 0);
if (!irq)
goto out_free_characteristics;
- clk = at91_clk_register_master(pmc, irq, name, num_parents,
+ clk = at91_clk_register_master(regmap, irq, name, num_parents,
parent_names, layout,
characteristics);
if (IS_ERR(clk))
@@ -256,14 +272,16 @@ out_free_characteristics:
kfree(characteristics);
}
-void __init of_at91rm9200_clk_master_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_master_setup(struct device_node *np)
{
- of_at91_clk_master_setup(np, pmc, &at91rm9200_master_layout);
+ of_at91_clk_master_setup(np, &at91rm9200_master_layout);
}
+CLK_OF_DECLARE(at91rm9200_clk_master, "atmel,at91rm9200-clk-master",
+ of_at91rm9200_clk_master_setup);
-void __init of_at91sam9x5_clk_master_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_master_setup(struct device_node *np)
{
- of_at91_clk_master_setup(np, pmc, &at91sam9x5_master_layout);
+ of_at91_clk_master_setup(np, &at91sam9x5_master_layout);
}
+CLK_OF_DECLARE(at91sam9x5_clk_master, "atmel,at91sam9x5-clk-master",
+ of_at91sam9x5_clk_master_setup);
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
index 58f3b568e9cb..33c31d43dd8d 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -14,9 +14,13 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
+DEFINE_SPINLOCK(pmc_pcr_lock);
+
#define PERIPHERAL_MAX 64
#define PERIPHERAL_AT91RM9200 0
@@ -33,7 +37,7 @@
struct clk_peripheral {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
u32 id;
};
@@ -41,8 +45,9 @@ struct clk_peripheral {
struct clk_sam9x5_peripheral {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
struct clk_range range;
+ spinlock_t *lock;
u32 id;
u32 div;
bool auto_div;
@@ -54,7 +59,6 @@ struct clk_sam9x5_peripheral {
static int clk_peripheral_enable(struct clk_hw *hw)
{
struct clk_peripheral *periph = to_clk_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
int offset = AT91_PMC_PCER;
u32 id = periph->id;
@@ -62,14 +66,14 @@ static int clk_peripheral_enable(struct clk_hw *hw)
return 0;
if (id > PERIPHERAL_ID_MAX)
offset = AT91_PMC_PCER1;
- pmc_write(pmc, offset, PERIPHERAL_MASK(id));
+ regmap_write(periph->regmap, offset, PERIPHERAL_MASK(id));
+
return 0;
}
static void clk_peripheral_disable(struct clk_hw *hw)
{
struct clk_peripheral *periph = to_clk_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
int offset = AT91_PMC_PCDR;
u32 id = periph->id;
@@ -77,21 +81,23 @@ static void clk_peripheral_disable(struct clk_hw *hw)
return;
if (id > PERIPHERAL_ID_MAX)
offset = AT91_PMC_PCDR1;
- pmc_write(pmc, offset, PERIPHERAL_MASK(id));
+ regmap_write(periph->regmap, offset, PERIPHERAL_MASK(id));
}
static int clk_peripheral_is_enabled(struct clk_hw *hw)
{
struct clk_peripheral *periph = to_clk_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
int offset = AT91_PMC_PCSR;
+ unsigned int status;
u32 id = periph->id;
if (id < PERIPHERAL_ID_MIN)
return 1;
if (id > PERIPHERAL_ID_MAX)
offset = AT91_PMC_PCSR1;
- return !!(pmc_read(pmc, offset) & PERIPHERAL_MASK(id));
+ regmap_read(periph->regmap, offset, &status);
+
+ return status & PERIPHERAL_MASK(id) ? 1 : 0;
}
static const struct clk_ops peripheral_ops = {
@@ -101,14 +107,14 @@ static const struct clk_ops peripheral_ops = {
};
static struct clk * __init
-at91_clk_register_peripheral(struct at91_pmc *pmc, const char *name,
+at91_clk_register_peripheral(struct regmap *regmap, const char *name,
const char *parent_name, u32 id)
{
struct clk_peripheral *periph;
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !name || !parent_name || id > PERIPHERAL_ID_MAX)
+ if (!name || !parent_name || id > PERIPHERAL_ID_MAX)
return ERR_PTR(-EINVAL);
periph = kzalloc(sizeof(*periph), GFP_KERNEL);
@@ -123,7 +129,7 @@ at91_clk_register_peripheral(struct at91_pmc *pmc, const char *name,
periph->id = id;
periph->hw.init = &init;
- periph->pmc = pmc;
+ periph->regmap = regmap;
clk = clk_register(NULL, &periph->hw);
if (IS_ERR(clk))
@@ -160,53 +166,58 @@ static void clk_sam9x5_peripheral_autodiv(struct clk_sam9x5_peripheral *periph)
static int clk_sam9x5_peripheral_enable(struct clk_hw *hw)
{
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
- u32 tmp;
+ unsigned long flags;
if (periph->id < PERIPHERAL_ID_MIN)
return 0;
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (periph->id & AT91_PMC_PCR_PID_MASK));
- tmp = pmc_read(pmc, AT91_PMC_PCR) & ~AT91_PMC_PCR_DIV_MASK;
- pmc_write(pmc, AT91_PMC_PCR, tmp | AT91_PMC_PCR_DIV(periph->div)
- | AT91_PMC_PCR_CMD
- | AT91_PMC_PCR_EN);
- pmc_unlock(pmc);
+ spin_lock_irqsave(periph->lock, flags);
+ regmap_write(periph->regmap, AT91_PMC_PCR,
+ (periph->id & AT91_PMC_PCR_PID_MASK));
+ regmap_update_bits(periph->regmap, AT91_PMC_PCR,
+ AT91_PMC_PCR_DIV_MASK | AT91_PMC_PCR_CMD |
+ AT91_PMC_PCR_EN,
+ AT91_PMC_PCR_DIV(periph->div) |
+ AT91_PMC_PCR_CMD |
+ AT91_PMC_PCR_EN);
+ spin_unlock_irqrestore(periph->lock, flags);
+
return 0;
}
static void clk_sam9x5_peripheral_disable(struct clk_hw *hw)
{
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
- u32 tmp;
+ unsigned long flags;
if (periph->id < PERIPHERAL_ID_MIN)
return;
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (periph->id & AT91_PMC_PCR_PID_MASK));
- tmp = pmc_read(pmc, AT91_PMC_PCR) & ~AT91_PMC_PCR_EN;
- pmc_write(pmc, AT91_PMC_PCR, tmp | AT91_PMC_PCR_CMD);
- pmc_unlock(pmc);
+ spin_lock_irqsave(periph->lock, flags);
+ regmap_write(periph->regmap, AT91_PMC_PCR,
+ (periph->id & AT91_PMC_PCR_PID_MASK));
+ regmap_update_bits(periph->regmap, AT91_PMC_PCR,
+ AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD,
+ AT91_PMC_PCR_CMD);
+ spin_unlock_irqrestore(periph->lock, flags);
}
static int clk_sam9x5_peripheral_is_enabled(struct clk_hw *hw)
{
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
- int ret;
+ unsigned long flags;
+ unsigned int status;
if (periph->id < PERIPHERAL_ID_MIN)
return 1;
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (periph->id & AT91_PMC_PCR_PID_MASK));
- ret = !!(pmc_read(pmc, AT91_PMC_PCR) & AT91_PMC_PCR_EN);
- pmc_unlock(pmc);
+ spin_lock_irqsave(periph->lock, flags);
+ regmap_write(periph->regmap, AT91_PMC_PCR,
+ (periph->id & AT91_PMC_PCR_PID_MASK));
+ regmap_read(periph->regmap, AT91_PMC_PCR, &status);
+ spin_unlock_irqrestore(periph->lock, flags);
- return ret;
+ return status & AT91_PMC_PCR_EN ? 1 : 0;
}
static unsigned long
@@ -214,19 +225,20 @@ clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw);
- struct at91_pmc *pmc = periph->pmc;
- u32 tmp;
+ unsigned long flags;
+ unsigned int status;
if (periph->id < PERIPHERAL_ID_MIN)
return parent_rate;
- pmc_lock(pmc);
- pmc_write(pmc, AT91_PMC_PCR, (periph->id & AT91_PMC_PCR_PID_MASK));
- tmp = pmc_read(pmc, AT91_PMC_PCR);
- pmc_unlock(pmc);
+ spin_lock_irqsave(periph->lock, flags);
+ regmap_write(periph->regmap, AT91_PMC_PCR,
+ (periph->id & AT91_PMC_PCR_PID_MASK));
+ regmap_read(periph->regmap, AT91_PMC_PCR, &status);
+ spin_unlock_irqrestore(periph->lock, flags);
- if (tmp & AT91_PMC_PCR_EN) {
- periph->div = PERIPHERAL_RSHIFT(tmp);
+ if (status & AT91_PMC_PCR_EN) {
+ periph->div = PERIPHERAL_RSHIFT(status);
periph->auto_div = false;
} else {
clk_sam9x5_peripheral_autodiv(periph);
@@ -318,15 +330,15 @@ static const struct clk_ops sam9x5_peripheral_ops = {
};
static struct clk * __init
-at91_clk_register_sam9x5_peripheral(struct at91_pmc *pmc, const char *name,
- const char *parent_name, u32 id,
- const struct clk_range *range)
+at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
+ const char *name, const char *parent_name,
+ u32 id, const struct clk_range *range)
{
struct clk_sam9x5_peripheral *periph;
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !name || !parent_name)
+ if (!name || !parent_name)
return ERR_PTR(-EINVAL);
periph = kzalloc(sizeof(*periph), GFP_KERNEL);
@@ -342,7 +354,8 @@ at91_clk_register_sam9x5_peripheral(struct at91_pmc *pmc, const char *name,
periph->id = id;
periph->hw.init = &init;
periph->div = 0;
- periph->pmc = pmc;
+ periph->regmap = regmap;
+ periph->lock = lock;
periph->auto_div = true;
periph->range = *range;
@@ -356,7 +369,7 @@ at91_clk_register_sam9x5_peripheral(struct at91_pmc *pmc, const char *name,
}
static void __init
-of_at91_clk_periph_setup(struct device_node *np, struct at91_pmc *pmc, u8 type)
+of_at91_clk_periph_setup(struct device_node *np, u8 type)
{
int num;
u32 id;
@@ -364,6 +377,7 @@ of_at91_clk_periph_setup(struct device_node *np, struct at91_pmc *pmc, u8 type)
const char *parent_name;
const char *name;
struct device_node *periphclknp;
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
if (!parent_name)
@@ -373,6 +387,10 @@ of_at91_clk_periph_setup(struct device_node *np, struct at91_pmc *pmc, u8 type)
if (!num || num > PERIPHERAL_MAX)
return;
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
for_each_child_of_node(np, periphclknp) {
if (of_property_read_u32(periphclknp, "reg", &id))
continue;
@@ -384,7 +402,7 @@ of_at91_clk_periph_setup(struct device_node *np, struct at91_pmc *pmc, u8 type)
name = periphclknp->name;
if (type == PERIPHERAL_AT91RM9200) {
- clk = at91_clk_register_peripheral(pmc, name,
+ clk = at91_clk_register_peripheral(regmap, name,
parent_name, id);
} else {
struct clk_range range = CLK_RANGE(0, 0);
@@ -393,7 +411,9 @@ of_at91_clk_periph_setup(struct device_node *np, struct at91_pmc *pmc, u8 type)
"atmel,clk-output-range",
&range);
- clk = at91_clk_register_sam9x5_peripheral(pmc, name,
+ clk = at91_clk_register_sam9x5_peripheral(regmap,
+ &pmc_pcr_lock,
+ name,
parent_name,
id, &range);
}
@@ -405,14 +425,17 @@ of_at91_clk_periph_setup(struct device_node *np, struct at91_pmc *pmc, u8 type)
}
}
-void __init of_at91rm9200_clk_periph_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_periph_setup(struct device_node *np)
{
- of_at91_clk_periph_setup(np, pmc, PERIPHERAL_AT91RM9200);
+ of_at91_clk_periph_setup(np, PERIPHERAL_AT91RM9200);
}
+CLK_OF_DECLARE(at91rm9200_clk_periph, "atmel,at91rm9200-clk-peripheral",
+ of_at91rm9200_clk_periph_setup);
-void __init of_at91sam9x5_clk_periph_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_periph_setup(struct device_node *np)
{
- of_at91_clk_periph_setup(np, pmc, PERIPHERAL_AT91SAM9X5);
+ of_at91_clk_periph_setup(np, PERIPHERAL_AT91SAM9X5);
}
+CLK_OF_DECLARE(at91sam9x5_clk_periph, "atmel,at91sam9x5-clk-peripheral",
+ of_at91sam9x5_clk_periph_setup);
+
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 18b60f4895a6..5f4c6ce628e0 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -20,6 +20,8 @@
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -58,7 +60,7 @@ struct clk_pll_layout {
struct clk_pll {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
u8 id;
@@ -79,10 +81,19 @@ static irqreturn_t clk_pll_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static inline bool clk_pll_ready(struct regmap *regmap, int id)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & PLL_STATUS_MASK(id) ? 1 : 0;
+}
+
static int clk_pll_prepare(struct clk_hw *hw)
{
struct clk_pll *pll = to_clk_pll(hw);
- struct at91_pmc *pmc = pll->pmc;
+ struct regmap *regmap = pll->regmap;
const struct clk_pll_layout *layout = pll->layout;
const struct clk_pll_characteristics *characteristics =
pll->characteristics;
@@ -90,38 +101,36 @@ static int clk_pll_prepare(struct clk_hw *hw)
u32 mask = PLL_STATUS_MASK(id);
int offset = PLL_REG(id);
u8 out = 0;
- u32 pllr, icpr;
+ unsigned int pllr;
+ unsigned int status;
u8 div;
u16 mul;
- pllr = pmc_read(pmc, offset);
+ regmap_read(regmap, offset, &pllr);
div = PLL_DIV(pllr);
mul = PLL_MUL(pllr, layout);
- if ((pmc_read(pmc, AT91_PMC_SR) & mask) &&
+ regmap_read(regmap, AT91_PMC_SR, &status);
+ if ((status & mask) &&
(div == pll->div && mul == pll->mul))
return 0;
if (characteristics->out)
out = characteristics->out[pll->range];
- if (characteristics->icpll) {
- icpr = pmc_read(pmc, AT91_PMC_PLLICPR) & ~PLL_ICPR_MASK(id);
- icpr |= (characteristics->icpll[pll->range] <<
- PLL_ICPR_SHIFT(id));
- pmc_write(pmc, AT91_PMC_PLLICPR, icpr);
- }
- pllr &= ~layout->pllr_mask;
- pllr |= layout->pllr_mask &
- (pll->div | (PLL_MAX_COUNT << PLL_COUNT_SHIFT) |
- (out << PLL_OUT_SHIFT) |
- ((pll->mul & layout->mul_mask) << layout->mul_shift));
- pmc_write(pmc, offset, pllr);
+ if (characteristics->icpll)
+ regmap_update_bits(regmap, AT91_PMC_PLLICPR, PLL_ICPR_MASK(id),
+ characteristics->icpll[pll->range] << PLL_ICPR_SHIFT(id));
- while (!(pmc_read(pmc, AT91_PMC_SR) & mask)) {
+ regmap_update_bits(regmap, offset, layout->pllr_mask,
+ pll->div | (PLL_MAX_COUNT << PLL_COUNT_SHIFT) |
+ (out << PLL_OUT_SHIFT) |
+ ((pll->mul & layout->mul_mask) << layout->mul_shift));
+
+ while (!clk_pll_ready(regmap, pll->id)) {
enable_irq(pll->irq);
wait_event(pll->wait,
- pmc_read(pmc, AT91_PMC_SR) & mask);
+ clk_pll_ready(regmap, pll->id));
}
return 0;
@@ -130,32 +139,35 @@ static int clk_pll_prepare(struct clk_hw *hw)
static int clk_pll_is_prepared(struct clk_hw *hw)
{
struct clk_pll *pll = to_clk_pll(hw);
- struct at91_pmc *pmc = pll->pmc;
- return !!(pmc_read(pmc, AT91_PMC_SR) &
- PLL_STATUS_MASK(pll->id));
+ return clk_pll_ready(pll->regmap, pll->id);
}
static void clk_pll_unprepare(struct clk_hw *hw)
{
struct clk_pll *pll = to_clk_pll(hw);
- struct at91_pmc *pmc = pll->pmc;
- const struct clk_pll_layout *layout = pll->layout;
- int offset = PLL_REG(pll->id);
- u32 tmp = pmc_read(pmc, offset) & ~(layout->pllr_mask);
+ unsigned int mask = pll->layout->pllr_mask;
- pmc_write(pmc, offset, tmp);
+ regmap_update_bits(pll->regmap, PLL_REG(pll->id), mask, ~mask);
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_pll *pll = to_clk_pll(hw);
+ unsigned int pllr;
+ u16 mul;
+ u8 div;
+
+ regmap_read(pll->regmap, PLL_REG(pll->id), &pllr);
+
+ div = PLL_DIV(pllr);
+ mul = PLL_MUL(pllr, pll->layout);
- if (!pll->div || !pll->mul)
+ if (!div || !mul)
return 0;
- return (parent_rate / pll->div) * (pll->mul + 1);
+ return (parent_rate / div) * (mul + 1);
}
static long clk_pll_get_best_div_mul(struct clk_pll *pll, unsigned long rate,
@@ -308,7 +320,7 @@ static const struct clk_ops pll_ops = {
};
static struct clk * __init
-at91_clk_register_pll(struct at91_pmc *pmc, unsigned int irq, const char *name,
+at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
const char *parent_name, u8 id,
const struct clk_pll_layout *layout,
const struct clk_pll_characteristics *characteristics)
@@ -318,7 +330,7 @@ at91_clk_register_pll(struct at91_pmc *pmc, unsigned int irq, const char *name,
struct clk_init_data init;
int ret;
int offset = PLL_REG(id);
- u32 tmp;
+ unsigned int pllr;
if (id > PLL_MAX_ID)
return ERR_PTR(-EINVAL);
@@ -337,11 +349,11 @@ at91_clk_register_pll(struct at91_pmc *pmc, unsigned int irq, const char *name,
pll->hw.init = &init;
pll->layout = layout;
pll->characteristics = characteristics;
- pll->pmc = pmc;
+ pll->regmap = regmap;
pll->irq = irq;
- tmp = pmc_read(pmc, offset) & layout->pllr_mask;
- pll->div = PLL_DIV(tmp);
- pll->mul = PLL_MUL(tmp, layout);
+ regmap_read(regmap, offset, &pllr);
+ pll->div = PLL_DIV(pllr);
+ pll->mul = PLL_MUL(pllr, layout);
init_waitqueue_head(&pll->wait);
irq_set_status_flags(pll->irq, IRQ_NOAUTOEN);
ret = request_irq(pll->irq, clk_pll_irq_handler, IRQF_TRIGGER_HIGH,
@@ -483,12 +495,13 @@ out_free_characteristics:
}
static void __init
-of_at91_clk_pll_setup(struct device_node *np, struct at91_pmc *pmc,
+of_at91_clk_pll_setup(struct device_node *np,
const struct clk_pll_layout *layout)
{
u32 id;
unsigned int irq;
struct clk *clk;
+ struct regmap *regmap;
const char *parent_name;
const char *name = np->name;
struct clk_pll_characteristics *characteristics;
@@ -500,6 +513,10 @@ of_at91_clk_pll_setup(struct device_node *np, struct at91_pmc *pmc,
of_property_read_string(np, "clock-output-names", &name);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
characteristics = of_at91_clk_pll_get_characteristics(np);
if (!characteristics)
return;
@@ -508,7 +525,7 @@ of_at91_clk_pll_setup(struct device_node *np, struct at91_pmc *pmc,
if (!irq)
return;
- clk = at91_clk_register_pll(pmc, irq, name, parent_name, id, layout,
+ clk = at91_clk_register_pll(regmap, irq, name, parent_name, id, layout,
characteristics);
if (IS_ERR(clk))
goto out_free_characteristics;
@@ -520,26 +537,30 @@ out_free_characteristics:
kfree(characteristics);
}
-void __init of_at91rm9200_clk_pll_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_pll_setup(struct device_node *np)
{
- of_at91_clk_pll_setup(np, pmc, &at91rm9200_pll_layout);
+ of_at91_clk_pll_setup(np, &at91rm9200_pll_layout);
}
+CLK_OF_DECLARE(at91rm9200_clk_pll, "atmel,at91rm9200-clk-pll",
+ of_at91rm9200_clk_pll_setup);
-void __init of_at91sam9g45_clk_pll_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9g45_clk_pll_setup(struct device_node *np)
{
- of_at91_clk_pll_setup(np, pmc, &at91sam9g45_pll_layout);
+ of_at91_clk_pll_setup(np, &at91sam9g45_pll_layout);
}
+CLK_OF_DECLARE(at91sam9g45_clk_pll, "atmel,at91sam9g45-clk-pll",
+ of_at91sam9g45_clk_pll_setup);
-void __init of_at91sam9g20_clk_pllb_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9g20_clk_pllb_setup(struct device_node *np)
{
- of_at91_clk_pll_setup(np, pmc, &at91sam9g20_pllb_layout);
+ of_at91_clk_pll_setup(np, &at91sam9g20_pllb_layout);
}
+CLK_OF_DECLARE(at91sam9g20_clk_pllb, "atmel,at91sam9g20-clk-pllb",
+ of_at91sam9g20_clk_pllb_setup);
-void __init of_sama5d3_clk_pll_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_sama5d3_clk_pll_setup(struct device_node *np)
{
- of_at91_clk_pll_setup(np, pmc, &sama5d3_pll_layout);
+ of_at91_clk_pll_setup(np, &sama5d3_pll_layout);
}
+CLK_OF_DECLARE(sama5d3_clk_pll, "atmel,sama5d3-clk-pll",
+ of_sama5d3_clk_pll_setup);
diff --git a/drivers/clk/at91/clk-plldiv.c b/drivers/clk/at91/clk-plldiv.c
index ea226562bb40..f43e93738a99 100644
--- a/drivers/clk/at91/clk-plldiv.c
+++ b/drivers/clk/at91/clk-plldiv.c
@@ -14,6 +14,8 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -21,16 +23,18 @@
struct clk_plldiv {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
};
static unsigned long clk_plldiv_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_plldiv *plldiv = to_clk_plldiv(hw);
- struct at91_pmc *pmc = plldiv->pmc;
+ unsigned int mckr;
- if (pmc_read(pmc, AT91_PMC_MCKR) & AT91_PMC_PLLADIV2)
+ regmap_read(plldiv->regmap, AT91_PMC_MCKR, &mckr);
+
+ if (mckr & AT91_PMC_PLLADIV2)
return parent_rate / 2;
return parent_rate;
@@ -57,18 +61,12 @@ static int clk_plldiv_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_plldiv *plldiv = to_clk_plldiv(hw);
- struct at91_pmc *pmc = plldiv->pmc;
- u32 tmp;
- if (parent_rate != rate && (parent_rate / 2) != rate)
+ if ((parent_rate != rate) && (parent_rate / 2 != rate))
return -EINVAL;
- pmc_lock(pmc);
- tmp = pmc_read(pmc, AT91_PMC_MCKR) & ~AT91_PMC_PLLADIV2;
- if ((parent_rate / 2) == rate)
- tmp |= AT91_PMC_PLLADIV2;
- pmc_write(pmc, AT91_PMC_MCKR, tmp);
- pmc_unlock(pmc);
+ regmap_update_bits(plldiv->regmap, AT91_PMC_MCKR, AT91_PMC_PLLADIV2,
+ parent_rate != rate ? AT91_PMC_PLLADIV2 : 0);
return 0;
}
@@ -80,7 +78,7 @@ static const struct clk_ops plldiv_ops = {
};
static struct clk * __init
-at91_clk_register_plldiv(struct at91_pmc *pmc, const char *name,
+at91_clk_register_plldiv(struct regmap *regmap, const char *name,
const char *parent_name)
{
struct clk_plldiv *plldiv;
@@ -98,7 +96,7 @@ at91_clk_register_plldiv(struct at91_pmc *pmc, const char *name,
init.flags = CLK_SET_RATE_GATE;
plldiv->hw.init = &init;
- plldiv->pmc = pmc;
+ plldiv->regmap = regmap;
clk = clk_register(NULL, &plldiv->hw);
@@ -109,27 +107,27 @@ at91_clk_register_plldiv(struct at91_pmc *pmc, const char *name,
}
static void __init
-of_at91_clk_plldiv_setup(struct device_node *np, struct at91_pmc *pmc)
+of_at91sam9x5_clk_plldiv_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_name;
const char *name = np->name;
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
of_property_read_string(np, "clock-output-names", &name);
- clk = at91_clk_register_plldiv(pmc, name, parent_name);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+ clk = at91_clk_register_plldiv(regmap, name, parent_name);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
return;
}
-
-void __init of_at91sam9x5_clk_plldiv_setup(struct device_node *np,
- struct at91_pmc *pmc)
-{
- of_at91_clk_plldiv_setup(np, pmc);
-}
+CLK_OF_DECLARE(at91sam9x5_clk_plldiv, "atmel,at91sam9x5-clk-plldiv",
+ of_at91sam9x5_clk_plldiv_setup);
diff --git a/drivers/clk/at91/clk-programmable.c b/drivers/clk/at91/clk-programmable.c
index 14b270b85fec..78814ba448c4 100644
--- a/drivers/clk/at91/clk-programmable.c
+++ b/drivers/clk/at91/clk-programmable.c
@@ -16,6 +16,8 @@
#include <linux/io.h>
#include <linux/wait.h>
#include <linux/sched.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -24,6 +26,7 @@
#define PROG_STATUS_MASK(id) (1 << ((id) + 8))
#define PROG_PRES_MASK 0x7
+#define PROG_PRES(layout, pckr) ((pckr >> layout->pres_shift) & PROG_PRES_MASK)
#define PROG_MAX_RM9200_CSS 3
struct clk_programmable_layout {
@@ -34,7 +37,7 @@ struct clk_programmable_layout {
struct clk_programmable {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
u8 id;
const struct clk_programmable_layout *layout;
};
@@ -44,14 +47,12 @@ struct clk_programmable {
static unsigned long clk_programmable_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- u32 pres;
struct clk_programmable *prog = to_clk_programmable(hw);
- struct at91_pmc *pmc = prog->pmc;
- const struct clk_programmable_layout *layout = prog->layout;
+ unsigned int pckr;
+
+ regmap_read(prog->regmap, AT91_PMC_PCKR(prog->id), &pckr);
- pres = (pmc_read(pmc, AT91_PMC_PCKR(prog->id)) >> layout->pres_shift) &
- PROG_PRES_MASK;
- return parent_rate >> pres;
+ return parent_rate >> PROG_PRES(prog->layout, pckr);
}
static int clk_programmable_determine_rate(struct clk_hw *hw,
@@ -101,36 +102,36 @@ static int clk_programmable_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_programmable *prog = to_clk_programmable(hw);
const struct clk_programmable_layout *layout = prog->layout;
- struct at91_pmc *pmc = prog->pmc;
- u32 tmp = pmc_read(pmc, AT91_PMC_PCKR(prog->id)) & ~layout->css_mask;
+ unsigned int mask = layout->css_mask;
+ unsigned int pckr = 0;
if (layout->have_slck_mck)
- tmp &= AT91_PMC_CSSMCK_MCK;
+ mask |= AT91_PMC_CSSMCK_MCK;
if (index > layout->css_mask) {
- if (index > PROG_MAX_RM9200_CSS && layout->have_slck_mck) {
- tmp |= AT91_PMC_CSSMCK_MCK;
- return 0;
- } else {
+ if (index > PROG_MAX_RM9200_CSS && !layout->have_slck_mck)
return -EINVAL;
- }
+
+ pckr |= AT91_PMC_CSSMCK_MCK;
}
- pmc_write(pmc, AT91_PMC_PCKR(prog->id), tmp | index);
+ regmap_update_bits(prog->regmap, AT91_PMC_PCKR(prog->id), mask, pckr);
+
return 0;
}
static u8 clk_programmable_get_parent(struct clk_hw *hw)
{
- u32 tmp;
- u8 ret;
struct clk_programmable *prog = to_clk_programmable(hw);
- struct at91_pmc *pmc = prog->pmc;
const struct clk_programmable_layout *layout = prog->layout;
+ unsigned int pckr;
+ u8 ret;
+
+ regmap_read(prog->regmap, AT91_PMC_PCKR(prog->id), &pckr);
+
+ ret = pckr & layout->css_mask;
- tmp = pmc_read(pmc, AT91_PMC_PCKR(prog->id));
- ret = tmp & layout->css_mask;
- if (layout->have_slck_mck && (tmp & AT91_PMC_CSSMCK_MCK) && !ret)
+ if (layout->have_slck_mck && (pckr & AT91_PMC_CSSMCK_MCK) && !ret)
ret = PROG_MAX_RM9200_CSS + 1;
return ret;
@@ -140,26 +141,27 @@ static int clk_programmable_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_programmable *prog = to_clk_programmable(hw);
- struct at91_pmc *pmc = prog->pmc;
const struct clk_programmable_layout *layout = prog->layout;
unsigned long div = parent_rate / rate;
+ unsigned int pckr;
int shift = 0;
- u32 tmp = pmc_read(pmc, AT91_PMC_PCKR(prog->id)) &
- ~(PROG_PRES_MASK << layout->pres_shift);
+
+ regmap_read(prog->regmap, AT91_PMC_PCKR(prog->id), &pckr);
if (!div)
return -EINVAL;
shift = fls(div) - 1;
- if (div != (1<<shift))
+ if (div != (1 << shift))
return -EINVAL;
if (shift >= PROG_PRES_MASK)
return -EINVAL;
- pmc_write(pmc, AT91_PMC_PCKR(prog->id),
- tmp | (shift << layout->pres_shift));
+ regmap_update_bits(prog->regmap, AT91_PMC_PCKR(prog->id),
+ PROG_PRES_MASK << layout->pres_shift,
+ shift << layout->pres_shift);
return 0;
}
@@ -173,7 +175,7 @@ static const struct clk_ops programmable_ops = {
};
static struct clk * __init
-at91_clk_register_programmable(struct at91_pmc *pmc,
+at91_clk_register_programmable(struct regmap *regmap,
const char *name, const char **parent_names,
u8 num_parents, u8 id,
const struct clk_programmable_layout *layout)
@@ -198,7 +200,7 @@ at91_clk_register_programmable(struct at91_pmc *pmc,
prog->id = id;
prog->layout = layout;
prog->hw.init = &init;
- prog->pmc = pmc;
+ prog->regmap = regmap;
clk = clk_register(NULL, &prog->hw);
if (IS_ERR(clk))
@@ -226,7 +228,7 @@ static const struct clk_programmable_layout at91sam9x5_programmable_layout = {
};
static void __init
-of_at91_clk_prog_setup(struct device_node *np, struct at91_pmc *pmc,
+of_at91_clk_prog_setup(struct device_node *np,
const struct clk_programmable_layout *layout)
{
int num;
@@ -236,6 +238,7 @@ of_at91_clk_prog_setup(struct device_node *np, struct at91_pmc *pmc,
const char *parent_names[PROG_SOURCE_MAX];
const char *name;
struct device_node *progclknp;
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents <= 0 || num_parents > PROG_SOURCE_MAX)
@@ -247,6 +250,10 @@ of_at91_clk_prog_setup(struct device_node *np, struct at91_pmc *pmc,
if (!num || num > (PROG_ID_MAX + 1))
return;
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
for_each_child_of_node(np, progclknp) {
if (of_property_read_u32(progclknp, "reg", &id))
continue;
@@ -254,7 +261,7 @@ of_at91_clk_prog_setup(struct device_node *np, struct at91_pmc *pmc,
if (of_property_read_string(np, "clock-output-names", &name))
name = progclknp->name;
- clk = at91_clk_register_programmable(pmc, name,
+ clk = at91_clk_register_programmable(regmap, name,
parent_names, num_parents,
id, layout);
if (IS_ERR(clk))
@@ -265,20 +272,23 @@ of_at91_clk_prog_setup(struct device_node *np, struct at91_pmc *pmc,
}
-void __init of_at91rm9200_clk_prog_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_prog_setup(struct device_node *np)
{
- of_at91_clk_prog_setup(np, pmc, &at91rm9200_programmable_layout);
+ of_at91_clk_prog_setup(np, &at91rm9200_programmable_layout);
}
+CLK_OF_DECLARE(at91rm9200_clk_prog, "atmel,at91rm9200-clk-programmable",
+ of_at91rm9200_clk_prog_setup);
-void __init of_at91sam9g45_clk_prog_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9g45_clk_prog_setup(struct device_node *np)
{
- of_at91_clk_prog_setup(np, pmc, &at91sam9g45_programmable_layout);
+ of_at91_clk_prog_setup(np, &at91sam9g45_programmable_layout);
}
+CLK_OF_DECLARE(at91sam9g45_clk_prog, "atmel,at91sam9g45-clk-programmable",
+ of_at91sam9g45_clk_prog_setup);
-void __init of_at91sam9x5_clk_prog_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_prog_setup(struct device_node *np)
{
- of_at91_clk_prog_setup(np, pmc, &at91sam9x5_programmable_layout);
+ of_at91_clk_prog_setup(np, &at91sam9x5_programmable_layout);
}
+CLK_OF_DECLARE(at91sam9x5_clk_prog, "atmel,at91sam9x5-clk-programmable",
+ of_at91sam9x5_clk_prog_setup);
diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c
index d0d5076a9b94..d4e3521216fd 100644
--- a/drivers/clk/at91/clk-slow.c
+++ b/drivers/clk/at91/clk-slow.c
@@ -22,6 +22,8 @@
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/wait.h>
@@ -59,7 +61,7 @@ struct clk_slow_rc_osc {
struct clk_sam9260_slow {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
};
#define to_clk_sam9260_slow(hw) container_of(hw, struct clk_sam9260_slow, hw)
@@ -393,8 +395,11 @@ void __init of_at91sam9x5_clk_slow_setup(struct device_node *np,
static u8 clk_sam9260_slow_get_parent(struct clk_hw *hw)
{
struct clk_sam9260_slow *slowck = to_clk_sam9260_slow(hw);
+ unsigned int status;
- return !!(pmc_read(slowck->pmc, AT91_PMC_SR) & AT91_PMC_OSCSEL);
+ regmap_read(slowck->regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_OSCSEL ? 1 : 0;
}
static const struct clk_ops sam9260_slow_ops = {
@@ -402,7 +407,7 @@ static const struct clk_ops sam9260_slow_ops = {
};
static struct clk * __init
-at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
+at91_clk_register_sam9260_slow(struct regmap *regmap,
const char *name,
const char **parent_names,
int num_parents)
@@ -411,7 +416,7 @@ at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
struct clk *clk = NULL;
struct clk_init_data init;
- if (!pmc || !name)
+ if (!name)
return ERR_PTR(-EINVAL);
if (!parent_names || !num_parents)
@@ -428,7 +433,7 @@ at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
init.flags = 0;
slowck->hw.init = &init;
- slowck->pmc = pmc;
+ slowck->regmap = regmap;
clk = clk_register(NULL, &slowck->hw);
if (IS_ERR(clk))
@@ -439,23 +444,26 @@ at91_clk_register_sam9260_slow(struct at91_pmc *pmc,
return clk;
}
-void __init of_at91sam9260_clk_slow_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9260_clk_slow_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_names[2];
int num_parents;
const char *name = np->name;
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents != 2)
return;
of_clk_parent_fill(np, parent_names, num_parents);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
of_property_read_string(np, "clock-output-names", &name);
- clk = at91_clk_register_sam9260_slow(pmc, name, parent_names,
+ clk = at91_clk_register_sam9260_slow(regmap, name, parent_names,
num_parents);
if (IS_ERR(clk))
return;
@@ -463,6 +471,9 @@ void __init of_at91sam9260_clk_slow_setup(struct device_node *np,
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91sam9260_clk_slow, "atmel,at91sam9260-clk-slow",
+ of_at91sam9260_clk_slow_setup);
+
/*
* FIXME: All slow clk users are not properly claiming it (get + prepare +
* enable) before using it.
diff --git a/drivers/clk/at91/clk-smd.c b/drivers/clk/at91/clk-smd.c
index a7f8501cfa05..0f6e8d67e630 100644
--- a/drivers/clk/at91/clk-smd.c
+++ b/drivers/clk/at91/clk-smd.c
@@ -14,6 +14,8 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -24,7 +26,7 @@
struct at91sam9x5_clk_smd {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
};
#define to_at91sam9x5_clk_smd(hw) \
@@ -33,13 +35,13 @@ struct at91sam9x5_clk_smd {
static unsigned long at91sam9x5_clk_smd_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- u32 tmp;
- u8 smddiv;
struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw);
- struct at91_pmc *pmc = smd->pmc;
+ unsigned int smdr;
+ u8 smddiv;
+
+ regmap_read(smd->regmap, AT91_PMC_SMD, &smdr);
+ smddiv = (smdr & AT91_PMC_SMD_DIV) >> SMD_DIV_SHIFT;
- tmp = pmc_read(pmc, AT91_PMC_SMD);
- smddiv = (tmp & AT91_PMC_SMD_DIV) >> SMD_DIV_SHIFT;
return parent_rate / (smddiv + 1);
}
@@ -67,40 +69,38 @@ static long at91sam9x5_clk_smd_round_rate(struct clk_hw *hw, unsigned long rate,
static int at91sam9x5_clk_smd_set_parent(struct clk_hw *hw, u8 index)
{
- u32 tmp;
struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw);
- struct at91_pmc *pmc = smd->pmc;
if (index > 1)
return -EINVAL;
- tmp = pmc_read(pmc, AT91_PMC_SMD) & ~AT91_PMC_SMDS;
- if (index)
- tmp |= AT91_PMC_SMDS;
- pmc_write(pmc, AT91_PMC_SMD, tmp);
+
+ regmap_update_bits(smd->regmap, AT91_PMC_SMD, AT91_PMC_SMDS,
+ index ? AT91_PMC_SMDS : 0);
+
return 0;
}
static u8 at91sam9x5_clk_smd_get_parent(struct clk_hw *hw)
{
struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw);
- struct at91_pmc *pmc = smd->pmc;
+ unsigned int smdr;
- return pmc_read(pmc, AT91_PMC_SMD) & AT91_PMC_SMDS;
+ regmap_read(smd->regmap, AT91_PMC_SMD, &smdr);
+
+ return smdr & AT91_PMC_SMDS;
}
static int at91sam9x5_clk_smd_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
- u32 tmp;
struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw);
- struct at91_pmc *pmc = smd->pmc;
unsigned long div = parent_rate / rate;
if (parent_rate % rate || div < 1 || div > (SMD_MAX_DIV + 1))
return -EINVAL;
- tmp = pmc_read(pmc, AT91_PMC_SMD) & ~AT91_PMC_SMD_DIV;
- tmp |= (div - 1) << SMD_DIV_SHIFT;
- pmc_write(pmc, AT91_PMC_SMD, tmp);
+
+ regmap_update_bits(smd->regmap, AT91_PMC_SMD, AT91_PMC_SMD_DIV,
+ (div - 1) << SMD_DIV_SHIFT);
return 0;
}
@@ -114,7 +114,7 @@ static const struct clk_ops at91sam9x5_smd_ops = {
};
static struct clk * __init
-at91sam9x5_clk_register_smd(struct at91_pmc *pmc, const char *name,
+at91sam9x5_clk_register_smd(struct regmap *regmap, const char *name,
const char **parent_names, u8 num_parents)
{
struct at91sam9x5_clk_smd *smd;
@@ -132,7 +132,7 @@ at91sam9x5_clk_register_smd(struct at91_pmc *pmc, const char *name,
init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
smd->hw.init = &init;
- smd->pmc = pmc;
+ smd->regmap = regmap;
clk = clk_register(NULL, &smd->hw);
if (IS_ERR(clk))
@@ -141,13 +141,13 @@ at91sam9x5_clk_register_smd(struct at91_pmc *pmc, const char *name,
return clk;
}
-void __init of_at91sam9x5_clk_smd_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_smd_setup(struct device_node *np)
{
struct clk *clk;
int num_parents;
const char *parent_names[SMD_SOURCE_MAX];
const char *name = np->name;
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents <= 0 || num_parents > SMD_SOURCE_MAX)
@@ -157,10 +157,16 @@ void __init of_at91sam9x5_clk_smd_setup(struct device_node *np,
of_property_read_string(np, "clock-output-names", &name);
- clk = at91sam9x5_clk_register_smd(pmc, name, parent_names,
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91sam9x5_clk_register_smd(regmap, name, parent_names,
num_parents);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91sam9x5_clk_smd, "atmel,at91sam9x5-clk-smd",
+ of_at91sam9x5_clk_smd_setup);
diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 3f5314344286..0593adf1bf4b 100644
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -19,6 +19,8 @@
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/sched.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -29,7 +31,7 @@
#define to_clk_system(hw) container_of(hw, struct clk_system, hw)
struct clk_system {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
u8 id;
@@ -49,24 +51,32 @@ static irqreturn_t clk_system_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static inline bool clk_system_ready(struct regmap *regmap, int id)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & (1 << id) ? 1 : 0;
+}
+
static int clk_system_prepare(struct clk_hw *hw)
{
struct clk_system *sys = to_clk_system(hw);
- struct at91_pmc *pmc = sys->pmc;
- u32 mask = 1 << sys->id;
- pmc_write(pmc, AT91_PMC_SCER, mask);
+ regmap_write(sys->regmap, AT91_PMC_SCER, 1 << sys->id);
if (!is_pck(sys->id))
return 0;
- while (!(pmc_read(pmc, AT91_PMC_SR) & mask)) {
+ while (!clk_system_ready(sys->regmap, sys->id)) {
if (sys->irq) {
enable_irq(sys->irq);
wait_event(sys->wait,
- pmc_read(pmc, AT91_PMC_SR) & mask);
- } else
+ clk_system_ready(sys->regmap, sys->id));
+ } else {
cpu_relax();
+ }
}
return 0;
}
@@ -74,23 +84,26 @@ static int clk_system_prepare(struct clk_hw *hw)
static void clk_system_unprepare(struct clk_hw *hw)
{
struct clk_system *sys = to_clk_system(hw);
- struct at91_pmc *pmc = sys->pmc;
- pmc_write(pmc, AT91_PMC_SCDR, 1 << sys->id);
+ regmap_write(sys->regmap, AT91_PMC_SCDR, 1 << sys->id);
}
static int clk_system_is_prepared(struct clk_hw *hw)
{
struct clk_system *sys = to_clk_system(hw);
- struct at91_pmc *pmc = sys->pmc;
+ unsigned int status;
+
+ regmap_read(sys->regmap, AT91_PMC_SCSR, &status);
- if (!(pmc_read(pmc, AT91_PMC_SCSR) & (1 << sys->id)))
+ if (!(status & (1 << sys->id)))
return 0;
if (!is_pck(sys->id))
return 1;
- return !!(pmc_read(pmc, AT91_PMC_SR) & (1 << sys->id));
+ regmap_read(sys->regmap, AT91_PMC_SR, &status);
+
+ return status & (1 << sys->id) ? 1 : 0;
}
static const struct clk_ops system_ops = {
@@ -100,7 +113,7 @@ static const struct clk_ops system_ops = {
};
static struct clk * __init
-at91_clk_register_system(struct at91_pmc *pmc, const char *name,
+at91_clk_register_system(struct regmap *regmap, const char *name,
const char *parent_name, u8 id, int irq)
{
struct clk_system *sys;
@@ -123,7 +136,7 @@ at91_clk_register_system(struct at91_pmc *pmc, const char *name,
sys->id = id;
sys->hw.init = &init;
- sys->pmc = pmc;
+ sys->regmap = regmap;
sys->irq = irq;
if (irq) {
init_waitqueue_head(&sys->wait);
@@ -146,8 +159,7 @@ at91_clk_register_system(struct at91_pmc *pmc, const char *name,
return clk;
}
-static void __init
-of_at91_clk_sys_setup(struct device_node *np, struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
{
int num;
int irq = 0;
@@ -156,11 +168,16 @@ of_at91_clk_sys_setup(struct device_node *np, struct at91_pmc *pmc)
const char *name;
struct device_node *sysclknp;
const char *parent_name;
+ struct regmap *regmap;
num = of_get_child_count(np);
if (num > (SYSTEM_MAX_ID + 1))
return;
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
for_each_child_of_node(np, sysclknp) {
if (of_property_read_u32(sysclknp, "reg", &id))
continue;
@@ -173,16 +190,13 @@ of_at91_clk_sys_setup(struct device_node *np, struct at91_pmc *pmc)
parent_name = of_clk_get_parent_name(sysclknp, 0);
- clk = at91_clk_register_system(pmc, name, parent_name, id, irq);
+ clk = at91_clk_register_system(regmap, name, parent_name, id,
+ irq);
if (IS_ERR(clk))
continue;
of_clk_add_provider(sysclknp, of_clk_src_simple_get, clk);
}
}
-
-void __init of_at91rm9200_clk_sys_setup(struct device_node *np,
- struct at91_pmc *pmc)
-{
- of_at91_clk_sys_setup(np, pmc);
-}
+CLK_OF_DECLARE(at91rm9200_clk_sys, "atmel,at91rm9200-clk-system",
+ of_at91rm9200_clk_sys_setup);
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index 8ab8502778a2..617e24f6ef76 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -14,6 +14,8 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -27,7 +29,7 @@
struct at91sam9x5_clk_usb {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
};
#define to_at91sam9x5_clk_usb(hw) \
@@ -35,7 +37,7 @@ struct at91sam9x5_clk_usb {
struct at91rm9200_clk_usb {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
u32 divisors[4];
};
@@ -45,13 +47,12 @@ struct at91rm9200_clk_usb {
static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- u32 tmp;
- u8 usbdiv;
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
+ unsigned int usbr;
+ u8 usbdiv;
- tmp = pmc_read(pmc, AT91_PMC_USB);
- usbdiv = (tmp & AT91_PMC_OHCIUSBDIV) >> SAM9X5_USB_DIV_SHIFT;
+ regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
+ usbdiv = (usbr & AT91_PMC_OHCIUSBDIV) >> SAM9X5_USB_DIV_SHIFT;
return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1));
}
@@ -109,33 +110,31 @@ static int at91sam9x5_clk_usb_determine_rate(struct clk_hw *hw,
static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
{
- u32 tmp;
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
if (index > 1)
return -EINVAL;
- tmp = pmc_read(pmc, AT91_PMC_USB) & ~AT91_PMC_USBS;
- if (index)
- tmp |= AT91_PMC_USBS;
- pmc_write(pmc, AT91_PMC_USB, tmp);
+
+ regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS,
+ index ? AT91_PMC_USBS : 0);
+
return 0;
}
static u8 at91sam9x5_clk_usb_get_parent(struct clk_hw *hw)
{
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
+ unsigned int usbr;
- return pmc_read(pmc, AT91_PMC_USB) & AT91_PMC_USBS;
+ regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
+
+ return usbr & AT91_PMC_USBS;
}
static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
- u32 tmp;
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
unsigned long div;
if (!rate)
@@ -145,9 +144,8 @@ static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
if (div > SAM9X5_USB_MAX_DIV + 1 || !div)
return -EINVAL;
- tmp = pmc_read(pmc, AT91_PMC_USB) & ~AT91_PMC_OHCIUSBDIV;
- tmp |= (div - 1) << SAM9X5_USB_DIV_SHIFT;
- pmc_write(pmc, AT91_PMC_USB, tmp);
+ regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_OHCIUSBDIV,
+ (div - 1) << SAM9X5_USB_DIV_SHIFT);
return 0;
}
@@ -163,28 +161,28 @@ static const struct clk_ops at91sam9x5_usb_ops = {
static int at91sam9n12_clk_usb_enable(struct clk_hw *hw)
{
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
- pmc_write(pmc, AT91_PMC_USB,
- pmc_read(pmc, AT91_PMC_USB) | AT91_PMC_USBS);
+ regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS,
+ AT91_PMC_USBS);
+
return 0;
}
static void at91sam9n12_clk_usb_disable(struct clk_hw *hw)
{
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
- pmc_write(pmc, AT91_PMC_USB,
- pmc_read(pmc, AT91_PMC_USB) & ~AT91_PMC_USBS);
+ regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS, 0);
}
static int at91sam9n12_clk_usb_is_enabled(struct clk_hw *hw)
{
struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
+ unsigned int usbr;
- return !!(pmc_read(pmc, AT91_PMC_USB) & AT91_PMC_USBS);
+ regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
+
+ return usbr & AT91_PMC_USBS;
}
static const struct clk_ops at91sam9n12_usb_ops = {
@@ -197,7 +195,7 @@ static const struct clk_ops at91sam9n12_usb_ops = {
};
static struct clk * __init
-at91sam9x5_clk_register_usb(struct at91_pmc *pmc, const char *name,
+at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
const char **parent_names, u8 num_parents)
{
struct at91sam9x5_clk_usb *usb;
@@ -216,7 +214,7 @@ at91sam9x5_clk_register_usb(struct at91_pmc *pmc, const char *name,
CLK_SET_RATE_PARENT;
usb->hw.init = &init;
- usb->pmc = pmc;
+ usb->regmap = regmap;
clk = clk_register(NULL, &usb->hw);
if (IS_ERR(clk))
@@ -226,7 +224,7 @@ at91sam9x5_clk_register_usb(struct at91_pmc *pmc, const char *name,
}
static struct clk * __init
-at91sam9n12_clk_register_usb(struct at91_pmc *pmc, const char *name,
+at91sam9n12_clk_register_usb(struct regmap *regmap, const char *name,
const char *parent_name)
{
struct at91sam9x5_clk_usb *usb;
@@ -244,7 +242,7 @@ at91sam9n12_clk_register_usb(struct at91_pmc *pmc, const char *name,
init.flags = CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT;
usb->hw.init = &init;
- usb->pmc = pmc;
+ usb->regmap = regmap;
clk = clk_register(NULL, &usb->hw);
if (IS_ERR(clk))
@@ -257,12 +255,12 @@ static unsigned long at91rm9200_clk_usb_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
- u32 tmp;
+ unsigned int pllbr;
u8 usbdiv;
- tmp = pmc_read(pmc, AT91_CKGR_PLLBR);
- usbdiv = (tmp & AT91_PMC_USBDIV) >> RM9200_USB_DIV_SHIFT;
+ regmap_read(usb->regmap, AT91_CKGR_PLLBR, &pllbr);
+
+ usbdiv = (pllbr & AT91_PMC_USBDIV) >> RM9200_USB_DIV_SHIFT;
if (usb->divisors[usbdiv])
return parent_rate / usb->divisors[usbdiv];
@@ -310,10 +308,8 @@ static long at91rm9200_clk_usb_round_rate(struct clk_hw *hw, unsigned long rate,
static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
- u32 tmp;
int i;
struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
- struct at91_pmc *pmc = usb->pmc;
unsigned long div;
if (!rate)
@@ -323,10 +319,10 @@ static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
for (i = 0; i < RM9200_USB_DIV_TAB_SIZE; i++) {
if (usb->divisors[i] == div) {
- tmp = pmc_read(pmc, AT91_CKGR_PLLBR) &
- ~AT91_PMC_USBDIV;
- tmp |= i << RM9200_USB_DIV_SHIFT;
- pmc_write(pmc, AT91_CKGR_PLLBR, tmp);
+ regmap_update_bits(usb->regmap, AT91_CKGR_PLLBR,
+ AT91_PMC_USBDIV,
+ i << RM9200_USB_DIV_SHIFT);
+
return 0;
}
}
@@ -341,7 +337,7 @@ static const struct clk_ops at91rm9200_usb_ops = {
};
static struct clk * __init
-at91rm9200_clk_register_usb(struct at91_pmc *pmc, const char *name,
+at91rm9200_clk_register_usb(struct regmap *regmap, const char *name,
const char *parent_name, const u32 *divisors)
{
struct at91rm9200_clk_usb *usb;
@@ -359,7 +355,7 @@ at91rm9200_clk_register_usb(struct at91_pmc *pmc, const char *name,
init.flags = CLK_SET_RATE_PARENT;
usb->hw.init = &init;
- usb->pmc = pmc;
+ usb->regmap = regmap;
memcpy(usb->divisors, divisors, sizeof(usb->divisors));
clk = clk_register(NULL, &usb->hw);
@@ -369,13 +365,13 @@ at91rm9200_clk_register_usb(struct at91_pmc *pmc, const char *name,
return clk;
}
-void __init of_at91sam9x5_clk_usb_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_usb_setup(struct device_node *np)
{
struct clk *clk;
int num_parents;
const char *parent_names[USB_SOURCE_MAX];
const char *name = np->name;
+ struct regmap *regmap;
num_parents = of_clk_get_parent_count(np);
if (num_parents <= 0 || num_parents > USB_SOURCE_MAX)
@@ -385,19 +381,26 @@ void __init of_at91sam9x5_clk_usb_setup(struct device_node *np,
of_property_read_string(np, "clock-output-names", &name);
- clk = at91sam9x5_clk_register_usb(pmc, name, parent_names, num_parents);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91sam9x5_clk_register_usb(regmap, name, parent_names,
+ num_parents);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91sam9x5_clk_usb, "atmel,at91sam9x5-clk-usb",
+ of_at91sam9x5_clk_usb_setup);
-void __init of_at91sam9n12_clk_usb_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91sam9n12_clk_usb_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_name;
const char *name = np->name;
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
if (!parent_name)
@@ -405,20 +408,26 @@ void __init of_at91sam9n12_clk_usb_setup(struct device_node *np,
of_property_read_string(np, "clock-output-names", &name);
- clk = at91sam9n12_clk_register_usb(pmc, name, parent_name);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91sam9n12_clk_register_usb(regmap, name, parent_name);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91sam9n12_clk_usb, "atmel,at91sam9n12-clk-usb",
+ of_at91sam9n12_clk_usb_setup);
-void __init of_at91rm9200_clk_usb_setup(struct device_node *np,
- struct at91_pmc *pmc)
+static void __init of_at91rm9200_clk_usb_setup(struct device_node *np)
{
struct clk *clk;
const char *parent_name;
const char *name = np->name;
u32 divisors[4] = {0, 0, 0, 0};
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
if (!parent_name)
@@ -430,9 +439,15 @@ void __init of_at91rm9200_clk_usb_setup(struct device_node *np,
of_property_read_string(np, "clock-output-names", &name);
- clk = at91rm9200_clk_register_usb(pmc, name, parent_name, divisors);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91rm9200_clk_register_usb(regmap, name, parent_name, divisors);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
}
+CLK_OF_DECLARE(at91rm9200_clk_usb, "atmel,at91rm9200-clk-usb",
+ of_at91rm9200_clk_usb_setup);
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c
index ca561e90a60f..58a310e5768c 100644
--- a/drivers/clk/at91/clk-utmi.c
+++ b/drivers/clk/at91/clk-utmi.c
@@ -19,6 +19,8 @@
#include <linux/io.h>
#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include "pmc.h"
@@ -26,7 +28,7 @@
struct clk_utmi {
struct clk_hw hw;
- struct at91_pmc *pmc;
+ struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
};
@@ -43,19 +45,27 @@ static irqreturn_t clk_utmi_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static inline bool clk_utmi_ready(struct regmap *regmap)
+{
+ unsigned int status;
+
+ regmap_read(regmap, AT91_PMC_SR, &status);
+
+ return status & AT91_PMC_LOCKU;
+}
+
static int clk_utmi_prepare(struct clk_hw *hw)
{
struct clk_utmi *utmi = to_clk_utmi(hw);
- struct at91_pmc *pmc = utmi->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_UCKR) | AT91_PMC_UPLLEN |
- AT91_PMC_UPLLCOUNT | AT91_PMC_BIASEN;
+ unsigned int uckr = AT91_PMC_UPLLEN | AT91_PMC_UPLLCOUNT |
+ AT91_PMC_BIASEN;
- pmc_write(pmc, AT91_CKGR_UCKR, tmp);
+ regmap_update_bits(utmi->regmap, AT91_CKGR_UCKR, uckr, uckr);
- while (!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_LOCKU)) {
+ while (!clk_utmi_ready(utmi->regmap)) {
enable_irq(utmi->irq);
wait_event(utmi->wait,
- pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_LOCKU);
+ clk_utmi_ready(utmi->regmap));
}
return 0;
@@ -64,18 +74,15 @@ static int clk_utmi_prepare(struct clk_hw *hw)
static int clk_utmi_is_prepared(struct clk_hw *hw)
{
struct clk_utmi *utmi = to_clk_utmi(hw);
- struct at91_pmc *pmc = utmi->pmc;
- return !!(pmc_read(pmc, AT91_PMC_SR) & AT91_PMC_LOCKU);
+ return clk_utmi_ready(utmi->regmap);
}
static void clk_utmi_unprepare(struct clk_hw *hw)
{
struct clk_utmi *utmi = to_clk_utmi(hw);
- struct at91_pmc *pmc = utmi->pmc;
- u32 tmp = pmc_read(pmc, AT91_CKGR_UCKR) & ~AT91_PMC_UPLLEN;
- pmc_write(pmc, AT91_CKGR_UCKR, tmp);
+ regmap_update_bits(utmi->regmap, AT91_CKGR_UCKR, AT91_PMC_UPLLEN, 0);
}
static unsigned long clk_utmi_recalc_rate(struct clk_hw *hw,
@@ -93,7 +100,7 @@ static const struct clk_ops utmi_ops = {
};
static struct clk * __init
-at91_clk_register_utmi(struct at91_pmc *pmc, unsigned int irq,
+at91_clk_register_utmi(struct regmap *regmap, unsigned int irq,
const char *name, const char *parent_name)
{
int ret;
@@ -112,7 +119,7 @@ at91_clk_register_utmi(struct at91_pmc *pmc, unsigned int irq,
init.flags = CLK_SET_RATE_GATE;
utmi->hw.init = &init;
- utmi->pmc = pmc;
+ utmi->regmap = regmap;
utmi->irq = irq;
init_waitqueue_head(&utmi->wait);
irq_set_status_flags(utmi->irq, IRQ_NOAUTOEN);
@@ -132,13 +139,13 @@ at91_clk_register_utmi(struct at91_pmc *pmc, unsigned int irq,
return clk;
}
-static void __init
-of_at91_clk_utmi_setup(struct device_node *np, struct at91_pmc *pmc)
+static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
{
unsigned int irq;
struct clk *clk;
const char *parent_name;
const char *name = np->name;
+ struct regmap *regmap;
parent_name = of_clk_get_parent_name(np, 0);
@@ -148,16 +155,16 @@ of_at91_clk_utmi_setup(struct device_node *np, struct at91_pmc *pmc)
if (!irq)
return;
- clk = at91_clk_register_utmi(pmc, irq, name, parent_name);
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return;
+
+ clk = at91_clk_register_utmi(regmap, irq, name, parent_name);
if (IS_ERR(clk))
return;
of_clk_add_provider(np, of_clk_src_simple_get, clk);
return;
}
-
-void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np,
- struct at91_pmc *pmc)
-{
- of_at91_clk_utmi_setup(np, pmc);
-}
+CLK_OF_DECLARE(at91sam9x5_clk_utmi, "atmel,at91sam9x5-clk-utmi",
+ of_at91sam9x5_clk_utmi_setup);
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 481146029b2e..295b17b9c689 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -20,6 +20,7 @@
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <asm/proc-fns.h>
@@ -70,14 +71,14 @@ static void pmc_irq_mask(struct irq_data *d)
{
struct at91_pmc *pmc = irq_data_get_irq_chip_data(d);
- pmc_write(pmc, AT91_PMC_IDR, 1 << d->hwirq);
+ regmap_write(pmc->regmap, AT91_PMC_IDR, 1 << d->hwirq);
}
static void pmc_irq_unmask(struct irq_data *d)
{
struct at91_pmc *pmc = irq_data_get_irq_chip_data(d);
- pmc_write(pmc, AT91_PMC_IER, 1 << d->hwirq);
+ regmap_write(pmc->regmap, AT91_PMC_IER, 1 << d->hwirq);
}
static int pmc_irq_set_type(struct irq_data *d, unsigned type)
@@ -94,15 +95,15 @@ static void pmc_irq_suspend(struct irq_data *d)
{
struct at91_pmc *pmc = irq_data_get_irq_chip_data(d);
- pmc->imr = pmc_read(pmc, AT91_PMC_IMR);
- pmc_write(pmc, AT91_PMC_IDR, pmc->imr);
+ regmap_read(pmc->regmap, AT91_PMC_IMR, &pmc->imr);
+ regmap_write(pmc->regmap, AT91_PMC_IDR, pmc->imr);
}
static void pmc_irq_resume(struct irq_data *d)
{
struct at91_pmc *pmc = irq_data_get_irq_chip_data(d);
- pmc_write(pmc, AT91_PMC_IER, pmc->imr);
+ regmap_write(pmc->regmap, AT91_PMC_IER, pmc->imr);
}
static struct irq_chip pmc_irq = {
@@ -161,10 +162,14 @@ static const struct irq_domain_ops pmc_irq_ops = {
static irqreturn_t pmc_irq_handler(int irq, void *data)
{
struct at91_pmc *pmc = (struct at91_pmc *)data;
+ unsigned int tmpsr, imr;
unsigned long sr;
int n;
- sr = pmc_read(pmc, AT91_PMC_SR) & pmc_read(pmc, AT91_PMC_IMR);
+ regmap_read(pmc->regmap, AT91_PMC_SR, &tmpsr);
+ regmap_read(pmc->regmap, AT91_PMC_IMR, &imr);
+
+ sr = tmpsr & imr;
if (!sr)
return IRQ_NONE;
@@ -239,17 +244,15 @@ static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
if (!pmc)
return NULL;
- spin_lock_init(&pmc->lock);
pmc->regmap = regmap;
pmc->virq = virq;
pmc->caps = caps;
pmc->irqdomain = irq_domain_add_linear(np, 32, &pmc_irq_ops, pmc);
-
if (!pmc->irqdomain)
goto out_free_pmc;
- pmc_write(pmc, AT91_PMC_IDR, 0xffffffff);
+ regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
if (request_irq(pmc->virq, pmc_irq_handler,
IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc))
goto out_remove_irqdomain;
@@ -264,137 +267,10 @@ out_free_pmc:
return NULL;
}
-static const struct of_device_id pmc_clk_ids[] __initconst = {
- /* Slow oscillator */
- {
- .compatible = "atmel,at91sam9260-clk-slow",
- .data = of_at91sam9260_clk_slow_setup,
- },
- /* Main clock */
- {
- .compatible = "atmel,at91rm9200-clk-main-osc",
- .data = of_at91rm9200_clk_main_osc_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-main-rc-osc",
- .data = of_at91sam9x5_clk_main_rc_osc_setup,
- },
- {
- .compatible = "atmel,at91rm9200-clk-main",
- .data = of_at91rm9200_clk_main_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-main",
- .data = of_at91sam9x5_clk_main_setup,
- },
- /* PLL clocks */
- {
- .compatible = "atmel,at91rm9200-clk-pll",
- .data = of_at91rm9200_clk_pll_setup,
- },
- {
- .compatible = "atmel,at91sam9g45-clk-pll",
- .data = of_at91sam9g45_clk_pll_setup,
- },
- {
- .compatible = "atmel,at91sam9g20-clk-pllb",
- .data = of_at91sam9g20_clk_pllb_setup,
- },
- {
- .compatible = "atmel,sama5d3-clk-pll",
- .data = of_sama5d3_clk_pll_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-plldiv",
- .data = of_at91sam9x5_clk_plldiv_setup,
- },
- /* Master clock */
- {
- .compatible = "atmel,at91rm9200-clk-master",
- .data = of_at91rm9200_clk_master_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-master",
- .data = of_at91sam9x5_clk_master_setup,
- },
- /* System clocks */
- {
- .compatible = "atmel,at91rm9200-clk-system",
- .data = of_at91rm9200_clk_sys_setup,
- },
- /* Peripheral clocks */
- {
- .compatible = "atmel,at91rm9200-clk-peripheral",
- .data = of_at91rm9200_clk_periph_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-peripheral",
- .data = of_at91sam9x5_clk_periph_setup,
- },
- /* Programmable clocks */
- {
- .compatible = "atmel,at91rm9200-clk-programmable",
- .data = of_at91rm9200_clk_prog_setup,
- },
- {
- .compatible = "atmel,at91sam9g45-clk-programmable",
- .data = of_at91sam9g45_clk_prog_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-programmable",
- .data = of_at91sam9x5_clk_prog_setup,
- },
- /* UTMI clock */
-#if defined(CONFIG_HAVE_AT91_UTMI)
- {
- .compatible = "atmel,at91sam9x5-clk-utmi",
- .data = of_at91sam9x5_clk_utmi_setup,
- },
-#endif
- /* USB clock */
-#if defined(CONFIG_HAVE_AT91_USB_CLK)
- {
- .compatible = "atmel,at91rm9200-clk-usb",
- .data = of_at91rm9200_clk_usb_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-usb",
- .data = of_at91sam9x5_clk_usb_setup,
- },
- {
- .compatible = "atmel,at91sam9n12-clk-usb",
- .data = of_at91sam9n12_clk_usb_setup,
- },
-#endif
- /* SMD clock */
-#if defined(CONFIG_HAVE_AT91_SMD)
- {
- .compatible = "atmel,at91sam9x5-clk-smd",
- .data = of_at91sam9x5_clk_smd_setup,
- },
-#endif
-#if defined(CONFIG_HAVE_AT91_H32MX)
- {
- .compatible = "atmel,sama5d4-clk-h32mx",
- .data = of_sama5d4_clk_h32mx_setup,
- },
-#endif
-#if defined(CONFIG_HAVE_AT91_GENERATED_CLK)
- {
- .compatible = "atmel,sama5d2-clk-generated",
- .data = of_sama5d2_clk_generated_setup,
- },
-#endif
- { /*sentinel*/ }
-};
-
static void __init of_at91_pmc_setup(struct device_node *np,
const struct at91_pmc_caps *caps)
{
struct at91_pmc *pmc;
- struct device_node *childnp;
- void (*clk_setup)(struct device_node *, struct at91_pmc *);
- const struct of_device_id *clk_id;
void __iomem *regbase = of_iomap(np, 0);
struct regmap *regmap;
int virq;
@@ -410,13 +286,6 @@ static void __init of_at91_pmc_setup(struct device_node *np,
pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
if (!pmc)
return;
- for_each_child_of_node(np, childnp) {
- clk_id = of_match_node(pmc_clk_ids, childnp);
- if (!clk_id)
- continue;
- clk_setup = clk_id->data;
- clk_setup(childnp, pmc);
- }
}
static void __init of_at91rm9200_pmc_setup(struct device_node *np)
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index e1fc0b0e1d8c..3b96c53c194c 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -31,99 +31,12 @@ struct at91_pmc_caps {
struct at91_pmc {
struct regmap *regmap;
int virq;
- spinlock_t lock;
const struct at91_pmc_caps *caps;
struct irq_domain *irqdomain;
u32 imr;
};
-static inline void pmc_lock(struct at91_pmc *pmc)
-{
- spin_lock(&pmc->lock);
-}
-
-static inline void pmc_unlock(struct at91_pmc *pmc)
-{
- spin_unlock(&pmc->lock);
-}
-
-static inline u32 pmc_read(struct at91_pmc *pmc, int offset)
-{
- unsigned int ret = 0;
-
- regmap_read(pmc->regmap, offset, &ret);
-
- return ret;
-}
-
-static inline void pmc_write(struct at91_pmc *pmc, int offset, u32 value)
-{
- regmap_write(pmc->regmap, offset, value);
-}
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range);
-void of_at91sam9260_clk_slow_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_main_osc_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91rm9200_clk_main_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_main_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_pll_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9g45_clk_pll_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9g20_clk_pllb_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_sama5d3_clk_pll_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_plldiv_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_master_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_master_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_sys_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_periph_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_periph_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_prog_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9g45_clk_prog_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_prog_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91sam9x5_clk_utmi_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91rm9200_clk_usb_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9x5_clk_usb_setup(struct device_node *np,
- struct at91_pmc *pmc);
-void of_at91sam9n12_clk_usb_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_at91sam9x5_clk_smd_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_sama5d4_clk_h32mx_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
-void of_sama5d2_clk_generated_setup(struct device_node *np,
- struct at91_pmc *pmc);
-
#endif /* __PMC_H_ */
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 02/13] clk: at91: make use of syscon/regmap internally Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:08 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 04/13] clk: at91: make IRQ optional and register them later Alexandre Belloni
` (10 subsequent siblings)
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
The three different irq handlers are doing the same thing, factorize their
code in a generic irq handler.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/clk-main.c | 144 +++++++++++++++++++-------------------------
1 file changed, 63 insertions(+), 81 deletions(-)
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index c1f119748bdc..5841eb958f83 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -34,25 +34,28 @@
#define MOR_KEY_MASK (0xff << 16)
-struct clk_main_osc {
+struct clk_main {
struct clk_hw hw;
struct regmap *regmap;
unsigned int irq;
wait_queue_head_t wait;
};
-#define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, hw)
+#define to_clk_main(hw) container_of(hw, struct clk_main, hw)
+
+struct clk_main_osc {
+ struct clk_main base;
+};
+
+#define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, base.hw)
struct clk_main_rc_osc {
- struct clk_hw hw;
- struct regmap *regmap;
- unsigned int irq;
- wait_queue_head_t wait;
+ struct clk_main base;
unsigned long frequency;
unsigned long accuracy;
};
-#define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, hw)
+#define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, base.hw)
struct clk_rm9200_main {
struct clk_hw hw;
@@ -62,21 +65,20 @@ struct clk_rm9200_main {
#define to_clk_rm9200_main(hw) container_of(hw, struct clk_rm9200_main, hw)
struct clk_sam9x5_main {
- struct clk_hw hw;
- struct regmap *regmap;
- unsigned int irq;
- wait_queue_head_t wait;
+ struct clk_main base;
u8 parent;
};
-#define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, hw)
+#define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, base.hw)
-static irqreturn_t clk_main_osc_irq_handler(int irq, void *dev_id)
+/* Generic structure */
+
+static irqreturn_t clk_main_irq_handler(int irq, void *dev_id)
{
- struct clk_main_osc *osc = dev_id;
+ struct clk_main *clkmain = dev_id;
- wake_up(&osc->wait);
- disable_irq_nosync(osc->irq);
+ wake_up(&clkmain->wait);
+ disable_irq_nosync(clkmain->irq);
return IRQ_HANDLED;
}
@@ -93,7 +95,7 @@ static inline bool clk_main_osc_ready(struct regmap *regmap)
static int clk_main_osc_prepare(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
u32 tmp;
regmap_read(regmap, AT91_CKGR_MOR, &tmp);
@@ -108,8 +110,8 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
}
while (!clk_main_osc_ready(regmap)) {
- enable_irq(osc->irq);
- wait_event(osc->wait,
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
clk_main_osc_ready(regmap));
}
@@ -119,7 +121,7 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
static void clk_main_osc_unprepare(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
u32 tmp;
regmap_read(regmap, AT91_CKGR_MOR, &tmp);
@@ -136,7 +138,7 @@ static void clk_main_osc_unprepare(struct clk_hw *hw)
static int clk_main_osc_is_prepared(struct clk_hw *hw)
{
struct clk_main_osc *osc = to_clk_main_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
u32 tmp, status;
regmap_read(regmap, AT91_CKGR_MOR, &tmp);
@@ -179,14 +181,14 @@ at91_clk_register_main_osc(struct regmap *regmap,
init.num_parents = 1;
init.flags = CLK_IGNORE_UNUSED;
- osc->hw.init = &init;
- osc->regmap = regmap;
- osc->irq = irq;
+ osc->base.hw.init = &init;
+ osc->base.regmap = regmap;
+ osc->base.irq = irq;
- init_waitqueue_head(&osc->wait);
- irq_set_status_flags(osc->irq, IRQ_NOAUTOEN);
- ret = request_irq(osc->irq, clk_main_osc_irq_handler,
- IRQF_TRIGGER_HIGH, name, osc);
+ init_waitqueue_head(&osc->base.wait);
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+ ret = request_irq(irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, name, &osc->base);
if (ret) {
kfree(osc);
return ERR_PTR(ret);
@@ -198,7 +200,7 @@ at91_clk_register_main_osc(struct regmap *regmap,
AT91_PMC_MOSCEN,
AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
- clk = clk_register(NULL, &osc->hw);
+ clk = clk_register(NULL, &osc->base.hw);
if (IS_ERR(clk)) {
free_irq(irq, osc);
kfree(osc);
@@ -237,16 +239,6 @@ static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
CLK_OF_DECLARE(at91rm9200_clk_main_osc, "atmel,at91rm9200-clk-main-osc",
of_at91rm9200_clk_main_osc_setup);
-static irqreturn_t clk_main_rc_osc_irq_handler(int irq, void *dev_id)
-{
- struct clk_main_rc_osc *osc = dev_id;
-
- wake_up(&osc->wait);
- disable_irq_nosync(osc->irq);
-
- return IRQ_HANDLED;
-}
-
static bool clk_main_rc_osc_ready(struct regmap *regmap)
{
unsigned int status;
@@ -259,7 +251,7 @@ static bool clk_main_rc_osc_ready(struct regmap *regmap)
static int clk_main_rc_osc_prepare(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
unsigned int mor;
regmap_read(regmap, AT91_CKGR_MOR, &mor);
@@ -270,8 +262,8 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
AT91_PMC_MOSCRCEN | AT91_PMC_KEY);
while (!clk_main_rc_osc_ready(regmap)) {
- enable_irq(osc->irq);
- wait_event(osc->wait,
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
clk_main_rc_osc_ready(regmap));
}
@@ -281,7 +273,7 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
static void clk_main_rc_osc_unprepare(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
unsigned int mor;
regmap_read(regmap, AT91_CKGR_MOR, &mor);
@@ -296,7 +288,7 @@ static void clk_main_rc_osc_unprepare(struct clk_hw *hw)
static int clk_main_rc_osc_is_prepared(struct clk_hw *hw)
{
struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
- struct regmap *regmap = osc->regmap;
+ struct regmap *regmap = osc->base.regmap;
unsigned int mor, status;
regmap_read(regmap, AT91_CKGR_MOR, &mor);
@@ -353,20 +345,20 @@ at91_clk_register_main_rc_osc(struct regmap *regmap,
init.num_parents = 0;
init.flags = CLK_IS_ROOT | CLK_IGNORE_UNUSED;
- osc->hw.init = &init;
- osc->regmap = regmap;
- osc->irq = irq;
+ osc->base.hw.init = &init;
+ osc->base.regmap = regmap;
+ osc->base.irq = irq;
osc->frequency = frequency;
osc->accuracy = accuracy;
- init_waitqueue_head(&osc->wait);
- irq_set_status_flags(osc->irq, IRQ_NOAUTOEN);
- ret = request_irq(osc->irq, clk_main_rc_osc_irq_handler,
- IRQF_TRIGGER_HIGH, name, osc);
+ init_waitqueue_head(&osc->base.wait);
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+ ret = request_irq(irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, name, &osc->base);
if (ret)
return ERR_PTR(ret);
- clk = clk_register(NULL, &osc->hw);
+ clk = clk_register(NULL, &osc->base.hw);
if (IS_ERR(clk)) {
free_irq(irq, osc);
kfree(osc);
@@ -529,16 +521,6 @@ static void __init of_at91rm9200_clk_main_setup(struct device_node *np)
CLK_OF_DECLARE(at91rm9200_clk_main, "atmel,at91rm9200-clk-main",
of_at91rm9200_clk_main_setup);
-static irqreturn_t clk_sam9x5_main_irq_handler(int irq, void *dev_id)
-{
- struct clk_sam9x5_main *clkmain = dev_id;
-
- wake_up(&clkmain->wait);
- disable_irq_nosync(clkmain->irq);
-
- return IRQ_HANDLED;
-}
-
static inline bool clk_sam9x5_main_ready(struct regmap *regmap)
{
unsigned int status;
@@ -551,11 +533,11 @@ static inline bool clk_sam9x5_main_ready(struct regmap *regmap)
static int clk_sam9x5_main_prepare(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- struct regmap *regmap = clkmain->regmap;
+ struct regmap *regmap = clkmain->base.regmap;
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->irq);
- wait_event(clkmain->wait,
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
clk_sam9x5_main_ready(regmap));
}
@@ -566,7 +548,7 @@ static int clk_sam9x5_main_is_prepared(struct clk_hw *hw)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- return clk_sam9x5_main_ready(clkmain->regmap);
+ return clk_sam9x5_main_ready(clkmain->base.regmap);
}
static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw,
@@ -574,13 +556,13 @@ static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw,
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- return clk_main_recalc_rate(clkmain->regmap, parent_rate);
+ return clk_main_recalc_rate(clkmain->base.regmap, parent_rate);
}
static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
- struct regmap *regmap = clkmain->regmap;
+ struct regmap *regmap = clkmain->base.regmap;
unsigned int tmp;
if (index > 1)
@@ -595,8 +577,8 @@ static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
regmap_write(regmap, AT91_CKGR_MOR, tmp & ~AT91_PMC_MOSCSEL);
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->irq);
- wait_event(clkmain->wait,
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
clk_sam9x5_main_ready(regmap));
}
@@ -608,7 +590,7 @@ static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw)
struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
unsigned int status;
- regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status);
+ regmap_read(clkmain->base.regmap, AT91_CKGR_MOR, &status);
return status & AT91_PMC_MOSCEN ? 1 : 0;
}
@@ -650,21 +632,21 @@ at91_clk_register_sam9x5_main(struct regmap *regmap,
init.num_parents = num_parents;
init.flags = CLK_SET_PARENT_GATE;
- clkmain->hw.init = &init;
- clkmain->regmap = regmap;
- clkmain->irq = irq;
- regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status);
+ clkmain->base.hw.init = &init;
+ clkmain->base.regmap = regmap;
+ clkmain->base.irq = irq;
+ regmap_read(clkmain->base.regmap, AT91_CKGR_MOR, &status);
clkmain->parent = status & AT91_PMC_MOSCEN ? 1 : 0;
- init_waitqueue_head(&clkmain->wait);
- irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
- ret = request_irq(clkmain->irq, clk_sam9x5_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, clkmain);
+ init_waitqueue_head(&clkmain->base.wait);
+ irq_set_status_flags(irq, IRQ_NOAUTOEN);
+ ret = request_irq(irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, name, &clkmain->base);
if (ret)
return ERR_PTR(ret);
- clk = clk_register(NULL, &clkmain->hw);
+ clk = clk_register(NULL, &clkmain->base.hw);
if (IS_ERR(clk)) {
- free_irq(clkmain->irq, clkmain);
+ free_irq(irq, clkmain);
kfree(clkmain);
}
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (2 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:02 ` Stephen Boyd
2016-01-22 15:40 ` Sebastian Andrzej Siewior
2015-12-04 17:03 ` [PATCH v3 05/13] clk: at91: only disable available IRQs Alexandre Belloni
` (9 subsequent siblings)
13 siblings, 2 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
The AT91 clock drivers make use of IRQs to avoid polling when waiting for
some clocks to be enabled. Unfortunately, this leads to a crash when those
IRQs are threaded (which happens when using preempt-rt) because they are
registered before thread creation is possible.
Use polling on those clocks until the IRQ is registered and register the
IRQ at module probe time.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/clk-main.c | 152 ++++++++++++++++++++++--------------------
drivers/clk/at91/clk-master.c | 74 ++++++++++++++------
drivers/clk/at91/clk-pll.c | 75 +++++++++++++++------
drivers/clk/at91/clk-system.c | 79 +++++++++++++++-------
drivers/clk/at91/clk-utmi.c | 75 ++++++++++++++-------
drivers/clk/at91/pmc.c | 106 ++++++++++++-----------------
6 files changed, 337 insertions(+), 224 deletions(-)
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index 5841eb958f83..4b021714e801 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -22,6 +23,8 @@
#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include "pmc.h"
@@ -110,9 +113,13 @@ static int clk_main_osc_prepare(struct clk_hw *hw)
}
while (!clk_main_osc_ready(regmap)) {
- enable_irq(osc->base.irq);
- wait_event(osc->base.wait,
- clk_main_osc_ready(regmap));
+ if (osc->base.irq) {
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
+ clk_main_osc_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -158,17 +165,15 @@ static const struct clk_ops main_osc_ops = {
static struct clk * __init
at91_clk_register_main_osc(struct regmap *regmap,
- unsigned int irq,
const char *name,
const char *parent_name,
bool bypass)
{
- int ret;
struct clk_main_osc *osc;
struct clk *clk = NULL;
struct clk_init_data init;
- if (!irq || !name || !parent_name)
+ if (!name || !parent_name)
return ERR_PTR(-EINVAL);
osc = kzalloc(sizeof(*osc), GFP_KERNEL);
@@ -183,16 +188,6 @@ at91_clk_register_main_osc(struct regmap *regmap,
osc->base.hw.init = &init;
osc->base.regmap = regmap;
- osc->base.irq = irq;
-
- init_waitqueue_head(&osc->base.wait);
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- ret = request_irq(irq, clk_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, &osc->base);
- if (ret) {
- kfree(osc);
- return ERR_PTR(ret);
- }
if (bypass)
regmap_update_bits(regmap,
@@ -201,10 +196,8 @@ at91_clk_register_main_osc(struct regmap *regmap,
AT91_PMC_OSCBYPASS | AT91_PMC_KEY);
clk = clk_register(NULL, &osc->base.hw);
- if (IS_ERR(clk)) {
- free_irq(irq, osc);
+ if (IS_ERR(clk))
kfree(osc);
- }
return clk;
}
@@ -212,7 +205,6 @@ at91_clk_register_main_osc(struct regmap *regmap,
static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
{
struct clk *clk;
- unsigned int irq;
const char *name = np->name;
const char *parent_name;
struct regmap *regmap;
@@ -226,11 +218,7 @@ static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np)
if (IS_ERR(regmap))
return;
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
- clk = at91_clk_register_main_osc(regmap, irq, name, parent_name, bypass);
+ clk = at91_clk_register_main_osc(regmap, name, parent_name, bypass);
if (IS_ERR(clk))
return;
@@ -262,9 +250,13 @@ static int clk_main_rc_osc_prepare(struct clk_hw *hw)
AT91_PMC_MOSCRCEN | AT91_PMC_KEY);
while (!clk_main_rc_osc_ready(regmap)) {
- enable_irq(osc->base.irq);
- wait_event(osc->base.wait,
- clk_main_rc_osc_ready(regmap));
+ if (osc->base.irq) {
+ enable_irq(osc->base.irq);
+ wait_event(osc->base.wait,
+ clk_main_rc_osc_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -323,11 +315,9 @@ static const struct clk_ops main_rc_osc_ops = {
static struct clk * __init
at91_clk_register_main_rc_osc(struct regmap *regmap,
- unsigned int irq,
const char *name,
u32 frequency, u32 accuracy)
{
- int ret;
struct clk_main_rc_osc *osc;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -347,22 +337,12 @@ at91_clk_register_main_rc_osc(struct regmap *regmap,
osc->base.hw.init = &init;
osc->base.regmap = regmap;
- osc->base.irq = irq;
osc->frequency = frequency;
osc->accuracy = accuracy;
- init_waitqueue_head(&osc->base.wait);
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- ret = request_irq(irq, clk_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, &osc->base);
- if (ret)
- return ERR_PTR(ret);
-
clk = clk_register(NULL, &osc->base.hw);
- if (IS_ERR(clk)) {
- free_irq(irq, osc);
+ if (IS_ERR(clk))
kfree(osc);
- }
return clk;
}
@@ -370,7 +350,6 @@ at91_clk_register_main_rc_osc(struct regmap *regmap,
static void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np)
{
struct clk *clk;
- unsigned int irq;
u32 frequency = 0;
u32 accuracy = 0;
const char *name = np->name;
@@ -380,16 +359,11 @@ static void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np)
of_property_read_u32(np, "clock-frequency", &frequency);
of_property_read_u32(np, "clock-accuracy", &accuracy);
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
regmap = syscon_node_to_regmap(of_get_parent(np));
if (IS_ERR(regmap))
return;
- clk = at91_clk_register_main_rc_osc(regmap, irq, name, frequency,
- accuracy);
+ clk = at91_clk_register_main_rc_osc(regmap, name, frequency, accuracy);
if (IS_ERR(clk))
return;
@@ -536,9 +510,13 @@ static int clk_sam9x5_main_prepare(struct clk_hw *hw)
struct regmap *regmap = clkmain->base.regmap;
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->base.irq);
- wait_event(clkmain->base.wait,
- clk_sam9x5_main_ready(regmap));
+ if (clkmain->base.irq) {
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
+ clk_sam9x5_main_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return clk_main_probe_frequency(regmap);
@@ -577,9 +555,13 @@ static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index)
regmap_write(regmap, AT91_CKGR_MOR, tmp & ~AT91_PMC_MOSCSEL);
while (!clk_sam9x5_main_ready(regmap)) {
- enable_irq(clkmain->base.irq);
- wait_event(clkmain->base.wait,
- clk_sam9x5_main_ready(regmap));
+ if (clkmain->base.irq) {
+ enable_irq(clkmain->base.irq);
+ wait_event(clkmain->base.wait,
+ clk_sam9x5_main_ready(regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -605,12 +587,10 @@ static const struct clk_ops sam9x5_main_ops = {
static struct clk * __init
at91_clk_register_sam9x5_main(struct regmap *regmap,
- unsigned int irq,
const char *name,
const char **parent_names,
int num_parents)
{
- int ret;
struct clk_sam9x5_main *clkmain;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -634,21 +614,12 @@ at91_clk_register_sam9x5_main(struct regmap *regmap,
clkmain->base.hw.init = &init;
clkmain->base.regmap = regmap;
- clkmain->base.irq = irq;
regmap_read(clkmain->base.regmap, AT91_CKGR_MOR, &status);
clkmain->parent = status & AT91_PMC_MOSCEN ? 1 : 0;
- init_waitqueue_head(&clkmain->base.wait);
- irq_set_status_flags(irq, IRQ_NOAUTOEN);
- ret = request_irq(irq, clk_main_irq_handler,
- IRQF_TRIGGER_HIGH, name, &clkmain->base);
- if (ret)
- return ERR_PTR(ret);
clk = clk_register(NULL, &clkmain->base.hw);
- if (IS_ERR(clk)) {
- free_irq(irq, clkmain);
+ if (IS_ERR(clk))
kfree(clkmain);
- }
return clk;
}
@@ -658,7 +629,6 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
struct clk *clk;
const char *parent_names[2];
int num_parents;
- unsigned int irq;
const char *name = np->name;
struct regmap *regmap;
@@ -673,11 +643,7 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
of_property_read_string(np, "clock-output-names", &name);
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
- clk = at91_clk_register_sam9x5_main(regmap, irq, name, parent_names,
+ clk = at91_clk_register_sam9x5_main(regmap, name, parent_names,
num_parents);
if (IS_ERR(clk))
return;
@@ -686,3 +652,45 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91sam9x5_clk_main, "atmel,at91sam9x5-clk-main",
of_at91sam9x5_clk_main_setup);
+
+static const struct of_device_id atmel_clk_main_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-main-osc" },
+ { .compatible = "atmel,at91sam9x5-clk-main-rc-osc" },
+ { .compatible = "atmel,at91sam9x5-clk-main" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_main_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_main *clkmain;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ clkmain = to_clk_main(hw);
+ clkmain->irq = platform_get_irq(pdev, 0);
+ if (!clkmain->irq)
+ return 0;
+
+ init_waitqueue_head(&clkmain->wait);
+ irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, clkmain->irq, clk_main_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk),
+ clkmain);
+ if (ret)
+ clkmain->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_main = {
+ .driver = {
+ .name = "atmel-clk-main",
+ .of_match_table = atmel_clk_main_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_main, atmel_clk_main_probe);
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
index 8d94ddfc9c72..700d0cbf5cd4 100644
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -8,12 +8,15 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/wait.h>
#include <linux/sched.h>
@@ -77,9 +80,13 @@ static int clk_master_prepare(struct clk_hw *hw)
struct clk_master *master = to_clk_master(hw);
while (!clk_master_ready(master->regmap)) {
- enable_irq(master->irq);
- wait_event(master->wait,
- clk_master_ready(master->regmap));
+ if (master->irq) {
+ enable_irq(master->irq);
+ wait_event(master->wait,
+ clk_master_ready(master->regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -143,13 +150,12 @@ static const struct clk_ops master_ops = {
};
static struct clk * __init
-at91_clk_register_master(struct regmap *regmap, unsigned int irq,
+at91_clk_register_master(struct regmap *regmap,
const char *name, int num_parents,
const char **parent_names,
const struct clk_master_layout *layout,
const struct clk_master_characteristics *characteristics)
{
- int ret;
struct clk_master *master;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -171,19 +177,9 @@ at91_clk_register_master(struct regmap *regmap, unsigned int irq,
master->layout = layout;
master->characteristics = characteristics;
master->regmap = regmap;
- master->irq = irq;
- init_waitqueue_head(&master->wait);
- irq_set_status_flags(master->irq, IRQ_NOAUTOEN);
- ret = request_irq(master->irq, clk_master_irq_handler,
- IRQF_TRIGGER_HIGH, "clk-master", master);
- if (ret) {
- kfree(master);
- return ERR_PTR(ret);
- }
clk = clk_register(NULL, &master->hw);
if (IS_ERR(clk)) {
- free_irq(master->irq, master);
kfree(master);
}
@@ -233,7 +229,6 @@ of_at91_clk_master_setup(struct device_node *np,
{
struct clk *clk;
int num_parents;
- unsigned int irq;
const char *parent_names[MASTER_SOURCE_MAX];
const char *name = np->name;
struct clk_master_characteristics *characteristics;
@@ -255,11 +250,7 @@ of_at91_clk_master_setup(struct device_node *np,
if (IS_ERR(regmap))
return;
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- goto out_free_characteristics;
-
- clk = at91_clk_register_master(regmap, irq, name, num_parents,
+ clk = at91_clk_register_master(regmap, name, num_parents,
parent_names, layout,
characteristics);
if (IS_ERR(clk))
@@ -285,3 +276,44 @@ static void __init of_at91sam9x5_clk_master_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91sam9x5_clk_master, "atmel,at91sam9x5-clk-master",
of_at91sam9x5_clk_master_setup);
+
+static const struct of_device_id atmel_clk_master_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-master" },
+ { .compatible = "atmel,at91sam9x5-clk-master" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_master_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_master *master;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ master = to_clk_master(hw);
+ master->irq = platform_get_irq(pdev, 0);
+ if (!master->irq)
+ return 0;
+
+ init_waitqueue_head(&master->wait);
+ irq_set_status_flags(master->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, master->irq, clk_master_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk),
+ master);
+ if (ret)
+ master->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_master = {
+ .driver = {
+ .name = "atmel-clk-master",
+ .of_match_table = atmel_clk_master_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_master, atmel_clk_master_probe);
diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c
index 5f4c6ce628e0..0cf69865c2c8 100644
--- a/drivers/clk/at91/clk-pll.c
+++ b/drivers/clk/at91/clk-pll.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -21,6 +22,8 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "pmc.h"
@@ -128,9 +131,13 @@ static int clk_pll_prepare(struct clk_hw *hw)
((pll->mul & layout->mul_mask) << layout->mul_shift));
while (!clk_pll_ready(regmap, pll->id)) {
- enable_irq(pll->irq);
- wait_event(pll->wait,
- clk_pll_ready(regmap, pll->id));
+ if (pll->irq) {
+ enable_irq(pll->irq);
+ wait_event(pll->wait,
+ clk_pll_ready(regmap, pll->id));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -320,7 +327,7 @@ static const struct clk_ops pll_ops = {
};
static struct clk * __init
-at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
+at91_clk_register_pll(struct regmap *regmap, const char *name,
const char *parent_name, u8 id,
const struct clk_pll_layout *layout,
const struct clk_pll_characteristics *characteristics)
@@ -328,7 +335,6 @@ at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
struct clk_pll *pll;
struct clk *clk = NULL;
struct clk_init_data init;
- int ret;
int offset = PLL_REG(id);
unsigned int pllr;
@@ -350,22 +356,12 @@ at91_clk_register_pll(struct regmap *regmap, unsigned int irq, const char *name,
pll->layout = layout;
pll->characteristics = characteristics;
pll->regmap = regmap;
- pll->irq = irq;
regmap_read(regmap, offset, &pllr);
pll->div = PLL_DIV(pllr);
pll->mul = PLL_MUL(pllr, layout);
- init_waitqueue_head(&pll->wait);
- irq_set_status_flags(pll->irq, IRQ_NOAUTOEN);
- ret = request_irq(pll->irq, clk_pll_irq_handler, IRQF_TRIGGER_HIGH,
- id ? "clk-pllb" : "clk-plla", pll);
- if (ret) {
- kfree(pll);
- return ERR_PTR(ret);
- }
clk = clk_register(NULL, &pll->hw);
if (IS_ERR(clk)) {
- free_irq(pll->irq, pll);
kfree(pll);
}
@@ -499,7 +495,6 @@ of_at91_clk_pll_setup(struct device_node *np,
const struct clk_pll_layout *layout)
{
u32 id;
- unsigned int irq;
struct clk *clk;
struct regmap *regmap;
const char *parent_name;
@@ -521,11 +516,7 @@ of_at91_clk_pll_setup(struct device_node *np,
if (!characteristics)
return;
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
- clk = at91_clk_register_pll(regmap, irq, name, parent_name, id, layout,
+ clk = at91_clk_register_pll(regmap, name, parent_name, id, layout,
characteristics);
if (IS_ERR(clk))
goto out_free_characteristics;
@@ -564,3 +555,45 @@ static void __init of_sama5d3_clk_pll_setup(struct device_node *np)
}
CLK_OF_DECLARE(sama5d3_clk_pll, "atmel,sama5d3-clk-pll",
of_sama5d3_clk_pll_setup);
+
+static const struct of_device_id atmel_clk_pll_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-pll" },
+ { .compatible = "atmel,at91sam9g45-clk-pll" },
+ { .compatible = "atmel,at91sam9g20-clk-pllb" },
+ { .compatible = "atmel,sama5d3-clk-pll" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_pll_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_pll *pll;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ pll = to_clk_pll(hw);
+ pll->irq = platform_get_irq(pdev, 0);
+ if (!pll->irq)
+ return 0;
+
+ init_waitqueue_head(&pll->wait);
+ irq_set_status_flags(pll->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, pll->irq, clk_pll_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk), pll);
+ if (ret)
+ pll->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_pll = {
+ .driver = {
+ .name = "atmel-clk-pll",
+ .of_match_table = atmel_clk_pll_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_pll, atmel_clk_pll_probe);
diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 0593adf1bf4b..d5fc7bbcc6b3 100644
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -20,6 +21,8 @@
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "pmc.h"
@@ -41,6 +44,7 @@ static inline int is_pck(int id)
{
return (id >= 8) && (id <= 15);
}
+
static irqreturn_t clk_system_irq_handler(int irq, void *dev_id)
{
struct clk_system *sys = (struct clk_system *)dev_id;
@@ -114,12 +118,11 @@ static const struct clk_ops system_ops = {
static struct clk * __init
at91_clk_register_system(struct regmap *regmap, const char *name,
- const char *parent_name, u8 id, int irq)
+ const char *parent_name, u8 id)
{
struct clk_system *sys;
struct clk *clk = NULL;
struct clk_init_data init;
- int ret;
if (!parent_name || id > SYSTEM_MAX_ID)
return ERR_PTR(-EINVAL);
@@ -137,24 +140,10 @@ at91_clk_register_system(struct regmap *regmap, const char *name,
sys->id = id;
sys->hw.init = &init;
sys->regmap = regmap;
- sys->irq = irq;
- if (irq) {
- init_waitqueue_head(&sys->wait);
- irq_set_status_flags(sys->irq, IRQ_NOAUTOEN);
- ret = request_irq(sys->irq, clk_system_irq_handler,
- IRQF_TRIGGER_HIGH, name, sys);
- if (ret) {
- kfree(sys);
- return ERR_PTR(ret);
- }
- }
clk = clk_register(NULL, &sys->hw);
- if (IS_ERR(clk)) {
- if (irq)
- free_irq(sys->irq, sys);
+ if (IS_ERR(clk))
kfree(sys);
- }
return clk;
}
@@ -162,7 +151,6 @@ at91_clk_register_system(struct regmap *regmap, const char *name,
static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
{
int num;
- int irq = 0;
u32 id;
struct clk *clk;
const char *name;
@@ -185,13 +173,9 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
if (of_property_read_string(np, "clock-output-names", &name))
name = sysclknp->name;
- if (is_pck(id))
- irq = irq_of_parse_and_map(sysclknp, 0);
-
parent_name = of_clk_get_parent_name(sysclknp, 0);
- clk = at91_clk_register_system(regmap, name, parent_name, id,
- irq);
+ clk = at91_clk_register_system(regmap, name, parent_name, id);
if (IS_ERR(clk))
continue;
@@ -200,3 +184,52 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91rm9200_clk_sys, "atmel,at91rm9200-clk-system",
of_at91rm9200_clk_sys_setup);
+
+static const struct of_device_id atmel_clk_sys_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-clk-system" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_sys_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *sysclknp;
+
+ for_each_child_of_node(np, sysclknp) {
+ struct of_phandle_args clkspec = { .np = sysclknp};
+ struct clk_hw *hw;
+ struct clk_system *sys;
+ int err;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ continue;
+
+ sys = to_clk_system(hw);
+ if (!is_pck(sys->id))
+ continue;
+
+ sys->irq = irq_of_parse_and_map(sysclknp, 0);
+ if (!sys->irq)
+ continue;
+
+ init_waitqueue_head(&sys->wait);
+ irq_set_status_flags(sys->irq, IRQ_NOAUTOEN);
+ err = devm_request_irq(&pdev->dev, sys->irq,
+ clk_system_irq_handler,
+ IRQF_TRIGGER_HIGH,
+ __clk_get_name(hw->clk), sys);
+ if (err)
+ sys->irq = 0;
+ }
+
+ return 0;
+}
+
+static struct platform_driver atmel_clk_sys = {
+ .driver = {
+ .name = "atmel-clk-sys",
+ .of_match_table = atmel_clk_sys_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_sys, atmel_clk_sys_probe);
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c
index 58a310e5768c..1f2fbf3bd13e 100644
--- a/drivers/clk/at91/clk-utmi.c
+++ b/drivers/clk/at91/clk-utmi.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -20,6 +21,8 @@
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include "pmc.h"
@@ -63,9 +66,13 @@ static int clk_utmi_prepare(struct clk_hw *hw)
regmap_update_bits(utmi->regmap, AT91_CKGR_UCKR, uckr, uckr);
while (!clk_utmi_ready(utmi->regmap)) {
- enable_irq(utmi->irq);
- wait_event(utmi->wait,
- clk_utmi_ready(utmi->regmap));
+ if (utmi->irq) {
+ enable_irq(utmi->irq);
+ wait_event(utmi->wait,
+ clk_utmi_ready(utmi->regmap));
+ } else {
+ cpu_relax();
+ }
}
return 0;
@@ -100,10 +107,9 @@ static const struct clk_ops utmi_ops = {
};
static struct clk * __init
-at91_clk_register_utmi(struct regmap *regmap, unsigned int irq,
+at91_clk_register_utmi(struct regmap *regmap,
const char *name, const char *parent_name)
{
- int ret;
struct clk_utmi *utmi;
struct clk *clk = NULL;
struct clk_init_data init;
@@ -120,28 +126,16 @@ at91_clk_register_utmi(struct regmap *regmap, unsigned int irq,
utmi->hw.init = &init;
utmi->regmap = regmap;
- utmi->irq = irq;
- init_waitqueue_head(&utmi->wait);
- irq_set_status_flags(utmi->irq, IRQ_NOAUTOEN);
- ret = request_irq(utmi->irq, clk_utmi_irq_handler,
- IRQF_TRIGGER_HIGH, "clk-utmi", utmi);
- if (ret) {
- kfree(utmi);
- return ERR_PTR(ret);
- }
clk = clk_register(NULL, &utmi->hw);
- if (IS_ERR(clk)) {
- free_irq(utmi->irq, utmi);
+ if (IS_ERR(clk))
kfree(utmi);
- }
return clk;
}
static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
{
- unsigned int irq;
struct clk *clk;
const char *parent_name;
const char *name = np->name;
@@ -151,15 +145,11 @@ static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
of_property_read_string(np, "clock-output-names", &name);
- irq = irq_of_parse_and_map(np, 0);
- if (!irq)
- return;
-
regmap = syscon_node_to_regmap(of_get_parent(np));
if (IS_ERR(regmap))
return;
- clk = at91_clk_register_utmi(regmap, irq, name, parent_name);
+ clk = at91_clk_register_utmi(regmap, name, parent_name);
if (IS_ERR(clk))
return;
@@ -168,3 +158,42 @@ static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
}
CLK_OF_DECLARE(at91sam9x5_clk_utmi, "atmel,at91sam9x5-clk-utmi",
of_at91sam9x5_clk_utmi_setup);
+
+static const struct of_device_id atmel_clk_utmi_dt_ids[] = {
+ { .compatible = "atmel,at91sam9x5-clk-utmi" },
+ { /* sentinel */ }
+};
+
+static int __init atmel_clk_utmi_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
+ struct clk_utmi *utmi;
+ struct clk_hw *hw;
+ int ret;
+
+ hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
+ if (!hw)
+ return -ENODEV;
+
+ utmi = to_clk_utmi(hw);
+ utmi->irq = platform_get_irq(pdev, 0);
+ if (!utmi->irq)
+ return 0;
+
+ init_waitqueue_head(&utmi->wait);
+ irq_set_status_flags(utmi->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(&pdev->dev, utmi->irq, clk_utmi_irq_handler,
+ IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk), utmi);
+ if (ret)
+ utmi->irq = 0;
+
+ return ret;
+}
+
+static struct platform_driver atmel_clk_utmi = {
+ .driver = {
+ .name = "atmel-clk-utmi",
+ .of_match_table = atmel_clk_utmi_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_clk_utmi, atmel_clk_utmi_probe);
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 295b17b9c689..296d20a29c6c 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -20,6 +20,9 @@
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <asm/proc-fns.h>
@@ -248,32 +251,30 @@ static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
pmc->virq = virq;
pmc->caps = caps;
- pmc->irqdomain = irq_domain_add_linear(np, 32, &pmc_irq_ops, pmc);
- if (!pmc->irqdomain)
- goto out_free_pmc;
-
- regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
- if (request_irq(pmc->virq, pmc_irq_handler,
- IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc))
- goto out_remove_irqdomain;
-
return pmc;
-
-out_remove_irqdomain:
- irq_domain_remove(pmc->irqdomain);
-out_free_pmc:
- kfree(pmc);
-
- return NULL;
}
-static void __init of_at91_pmc_setup(struct device_node *np,
- const struct at91_pmc_caps *caps)
+static const struct of_device_id atmel_pmc_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-pmc", .data = &at91rm9200_caps },
+ { .compatible = "atmel,at91sam9260-pmc", .data = &at91sam9260_caps },
+ { .compatible = "atmel,at91sam9g45-pmc", .data = &at91sam9g45_caps },
+ { .compatible = "atmel,at91sam9n12-pmc", .data = &at91sam9n12_caps },
+ { .compatible = "atmel,at91sam9x5-pmc", .data = &at91sam9x5_caps },
+ { .compatible = "atmel,sama5d2-pmc", .data = &sama5d2_caps },
+ { .compatible = "atmel,sama5d3-pmc", .data = &sama5d3_caps },
+ { /* sentinel */ },
+};
+
+static int __init atmel_pmc_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id;
+ const struct at91_pmc_caps *caps;
+ struct device_node *np = pdev->dev.of_node;
struct at91_pmc *pmc;
void __iomem *regbase = of_iomap(np, 0);
struct regmap *regmap;
int virq;
+ int ret = 0;
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
@@ -281,58 +282,35 @@ static void __init of_at91_pmc_setup(struct device_node *np,
virq = irq_of_parse_and_map(np, 0);
if (!virq)
- return;
+ return 0;
+
+ of_id = of_match_device(atmel_pmc_dt_ids, &pdev->dev);
+ caps = of_id->data;
pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
if (!pmc)
- return;
-}
-
-static void __init of_at91rm9200_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91rm9200_caps);
-}
-CLK_OF_DECLARE(at91rm9200_clk_pmc, "atmel,at91rm9200-pmc",
- of_at91rm9200_pmc_setup);
-
-static void __init of_at91sam9260_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9260_caps);
-}
-CLK_OF_DECLARE(at91sam9260_clk_pmc, "atmel,at91sam9260-pmc",
- of_at91sam9260_pmc_setup);
+ return 0;
-static void __init of_at91sam9g45_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9g45_caps);
-}
-CLK_OF_DECLARE(at91sam9g45_clk_pmc, "atmel,at91sam9g45-pmc",
- of_at91sam9g45_pmc_setup);
+ pmc->irqdomain = irq_domain_add_linear(pdev->dev.of_node, 32,
+ &pmc_irq_ops, pmc);
+ if (!pmc->irqdomain)
+ return 0;
-static void __init of_at91sam9n12_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9n12_caps);
-}
-CLK_OF_DECLARE(at91sam9n12_clk_pmc, "atmel,at91sam9n12-pmc",
- of_at91sam9n12_pmc_setup);
+ regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
+ ret = request_irq(pmc->virq, pmc_irq_handler,
+ IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc);
+ if (ret)
+ return ret;
-static void __init of_at91sam9x5_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &at91sam9x5_caps);
-}
-CLK_OF_DECLARE(at91sam9x5_clk_pmc, "atmel,at91sam9x5-pmc",
- of_at91sam9x5_pmc_setup);
+ of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
-static void __init of_sama5d2_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &sama5d2_caps);
+ return 0;
}
-CLK_OF_DECLARE(sama5d2_clk_pmc, "atmel,sama5d2-pmc",
- of_sama5d2_pmc_setup);
-static void __init of_sama5d3_pmc_setup(struct device_node *np)
-{
- of_at91_pmc_setup(np, &sama5d3_caps);
-}
-CLK_OF_DECLARE(sama5d3_clk_pmc, "atmel,sama5d3-pmc",
- of_sama5d3_pmc_setup);
+static struct platform_driver atmel_pmc = {
+ .driver = {
+ .name = "atmel-pmc",
+ .of_match_table = atmel_pmc_dt_ids,
+ },
+};
+module_platform_driver_probe(atmel_pmc, atmel_pmc_probe);
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 05/13] clk: at91: only disable available IRQs
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (3 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 04/13] clk: at91: make IRQ optional and register them later Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:05 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe Alexandre Belloni
` (8 subsequent siblings)
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Only disable available IRQs in case writing to a reserved bit has a harmful
effect.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 296d20a29c6c..2f8b9503176f 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -296,7 +296,7 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
if (!pmc->irqdomain)
return 0;
- regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
+ regmap_write(pmc->regmap, AT91_PMC_IDR, pmc->caps->available_irqs);
ret = request_irq(pmc->virq, pmc_irq_handler,
IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc);
if (ret)
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (4 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 05/13] clk: at91: only disable available IRQs Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:04 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file Alexandre Belloni
` (7 subsequent siblings)
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
at91_pmc_init() doesn't do much anymore, merge it in atmel_pmc_probe().
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 31 ++++++-------------------------
1 file changed, 6 insertions(+), 25 deletions(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 2f8b9503176f..55ed00fc9310 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -231,29 +231,6 @@ static const struct at91_pmc_caps sama5d3_caps = {
AT91_PMC_CFDEV,
};
-static struct at91_pmc *__init at91_pmc_init(struct device_node *np,
- struct regmap *regmap,
- void __iomem *regbase, int virq,
- const struct at91_pmc_caps *caps)
-{
- struct at91_pmc *pmc;
-
- if (!regbase || !virq || !caps)
- return NULL;
-
- at91_pmc_base = regbase;
-
- pmc = kzalloc(sizeof(*pmc), GFP_KERNEL);
- if (!pmc)
- return NULL;
-
- pmc->regmap = regmap;
- pmc->virq = virq;
- pmc->caps = caps;
-
- return pmc;
-}
-
static const struct of_device_id atmel_pmc_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-pmc", .data = &at91rm9200_caps },
{ .compatible = "atmel,at91sam9260-pmc", .data = &at91sam9260_caps },
@@ -271,11 +248,12 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
const struct at91_pmc_caps *caps;
struct device_node *np = pdev->dev.of_node;
struct at91_pmc *pmc;
- void __iomem *regbase = of_iomap(np, 0);
struct regmap *regmap;
int virq;
int ret = 0;
+ at91_pmc_base = of_iomap(np, 0);
+
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
panic("Could not retrieve syscon regmap");
@@ -287,10 +265,13 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
of_id = of_match_device(atmel_pmc_dt_ids, &pdev->dev);
caps = of_id->data;
- pmc = at91_pmc_init(np, regmap, regbase, virq, caps);
+ pmc = kzalloc(sizeof(*pmc), GFP_KERNEL);
if (!pmc)
return 0;
+ pmc->regmap = regmap;
+ pmc->virq = virq;
+ pmc->caps = caps;
pmc->irqdomain = irq_domain_add_linear(pdev->dev.of_node, 32,
&pmc_irq_ops, pmc);
if (!pmc->irqdomain)
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (5 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:04 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 08/13] ARM: at91: pm: simply call at91_pm_init Alexandre Belloni
` (6 subsequent siblings)
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
pmc.c is now the only user of struct at91_pmc*, move their definition in
the C file.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 12 ++++++++++++
drivers/clk/at91/pmc.h | 12 ------------
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 55ed00fc9310..cfbfea6d641f 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -29,6 +29,18 @@
#include "pmc.h"
+struct at91_pmc_caps {
+ u32 available_irqs;
+};
+
+struct at91_pmc {
+ struct regmap *regmap;
+ int virq;
+ const struct at91_pmc_caps *caps;
+ struct irq_domain *irqdomain;
+ u32 imr;
+};
+
void __iomem *at91_pmc_base;
EXPORT_SYMBOL_GPL(at91_pmc_base);
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 3b96c53c194c..550a461c7201 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -24,18 +24,6 @@ struct clk_range {
#define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
-struct at91_pmc_caps {
- u32 available_irqs;
-};
-
-struct at91_pmc {
- struct regmap *regmap;
- int virq;
- const struct at91_pmc_caps *caps;
- struct irq_domain *irqdomain;
- u32 imr;
-};
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range);
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 08/13] ARM: at91: pm: simply call at91_pm_init
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (6 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc Alexandre Belloni
` (5 subsequent siblings)
13 siblings, 0 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
at91_pm_init() doesn't return a value, as is the case for its callers,
simply call it instead of returning its non-existent return value.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/pm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 80e277cfcc8b..5c2b60c5a2a1 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -427,7 +427,7 @@ void __init at91sam9260_pm_init(void)
at91_dt_ramc();
at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
- return at91_pm_init();
+ at91_pm_init();
}
void __init at91sam9g45_pm_init(void)
@@ -435,7 +435,7 @@ void __init at91sam9g45_pm_init(void)
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
- return at91_pm_init();
+ at91_pm_init();
}
void __init at91sam9x5_pm_init(void)
@@ -443,5 +443,5 @@ void __init at91sam9x5_pm_init(void)
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
- return at91_pm_init();
+ at91_pm_init();
}
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (7 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 08/13] ARM: at91: pm: simply call at91_pm_init Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:04 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 10/13] ARM: at91: pm: move idle functions to pm.c Alexandre Belloni
` (4 subsequent siblings)
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
To avoid relying on at91_pmc_read(), find the pmc node and remap it
locally.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/pm.c | 33 +++++++++++++++++++++++++++------
1 file changed, 27 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 5c2b60c5a2a1..38e93174031d 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -35,6 +35,8 @@
#include "generic.h"
#include "pm.h"
+void __iomem *pmc;
+
/*
* FIXME: this is needed to communicate between the pinctrl driver and
* the PM implementation in the machine. Possibly part of the PM
@@ -85,7 +87,7 @@ static int at91_pm_verify_clocks(void)
unsigned long scsr;
int i;
- scsr = at91_pmc_read(AT91_PMC_SCSR);
+ scsr = readl(pmc + AT91_PMC_SCSR);
/* USB must not be using PLLB */
if ((scsr & at91_pm_data.uhp_udp_mask) != 0) {
@@ -99,8 +101,7 @@ static int at91_pm_verify_clocks(void)
if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
continue;
-
- css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
+ css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
if (css != AT91_PMC_CSS_SLOW) {
pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css);
return 0;
@@ -143,8 +144,8 @@ static void at91_pm_suspend(suspend_state_t state)
flush_cache_all();
outer_disable();
- at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0],
- at91_ramc_base[1], pm_data);
+ at91_suspend_sram_fn(pmc, at91_ramc_base[0],
+ at91_ramc_base[1], pm_data);
outer_resume();
}
@@ -394,13 +395,33 @@ static void __init at91_pm_sram_init(void)
&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
}
+static const struct of_device_id atmel_pmc_ids[] = {
+ { .compatible = "atmel,at91rm9200-pmc" },
+ { .compatible = "atmel,at91sam9260-pmc" },
+ { .compatible = "atmel,at91sam9g45-pmc" },
+ { .compatible = "atmel,at91sam9n12-pmc" },
+ { .compatible = "atmel,at91sam9x5-pmc" },
+ { .compatible = "atmel,sama5d3-pmc" },
+ { .compatible = "atmel,sama5d2-pmc" },
+ { /* sentinel */ },
+};
+
static void __init at91_pm_init(void)
{
- at91_pm_sram_init();
+ struct device_node *pmc_np;
if (at91_cpuidle_device.dev.platform_data)
platform_device_register(&at91_cpuidle_device);
+ pmc_np = of_find_matching_node(NULL, atmel_pmc_ids);
+ pmc = of_iomap(pmc_np, 0);
+ if (!pmc) {
+ pr_info("AT91: PM not supported, PMC not found\n");
+ return;
+ }
+
+ at91_pm_sram_init();
+
if (at91_suspend_sram_fn)
suspend_set_ops(&at91_pm_ops);
else
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 10/13] ARM: at91: pm: move idle functions to pm.c
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (8 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 11/13] ARM: at91: remove useless includes and function prototypes Alexandre Belloni
` (3 subsequent siblings)
13 siblings, 0 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
Avoid using code from clk/at91 for PM.
This also has the bonus effect of setting arm_pm_idle for sama5 platforms.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/at91rm9200.c | 2 --
arch/arm/mach-at91/at91sam9.c | 2 --
arch/arm/mach-at91/generic.h | 6 ++----
arch/arm/mach-at91/pm.c | 37 ++++++++++++++++++++++++++++++++-----
arch/arm/mach-at91/sama5.c | 2 +-
drivers/clk/at91/pmc.c | 15 ---------------
6 files changed, 35 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index c1a7c6cc00e1..63b4fa25b48a 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -12,7 +12,6 @@
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
-#include <asm/system_misc.h>
#include "generic.h"
#include "soc.h"
@@ -33,7 +32,6 @@ static void __init at91rm9200_dt_device_init(void)
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
- arm_pm_idle = at91rm9200_idle;
at91rm9200_pm_init();
}
diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
index 7eb64f763034..cada2a6412b3 100644
--- a/arch/arm/mach-at91/at91sam9.c
+++ b/arch/arm/mach-at91/at91sam9.c
@@ -62,8 +62,6 @@ static void __init at91sam9_common_init(void)
soc_dev = soc_device_to_device(soc);
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
-
- arm_pm_idle = at91sam9_idle;
}
static void __init at91sam9_dt_device_init(void)
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index b0fa7dc7286d..d224e195706a 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -18,20 +18,18 @@
extern void __init at91_map_io(void);
extern void __init at91_alt_map_io(void);
-/* idle */
-extern void at91rm9200_idle(void);
-extern void at91sam9_idle(void);
-
#ifdef CONFIG_PM
extern void __init at91rm9200_pm_init(void);
extern void __init at91sam9260_pm_init(void);
extern void __init at91sam9g45_pm_init(void);
extern void __init at91sam9x5_pm_init(void);
+extern void __init sama5_pm_init(void);
#else
static inline void __init at91rm9200_pm_init(void) { }
static inline void __init at91sam9260_pm_init(void) { }
static inline void __init at91sam9g45_pm_init(void) { }
static inline void __init at91sam9x5_pm_init(void) { }
+static inline void __init sama5_pm_init(void) { }
#endif
#endif /* _AT91_GENERIC_H */
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 38e93174031d..e7ba340fd8d0 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -31,6 +31,7 @@
#include <asm/mach/irq.h>
#include <asm/fncpy.h>
#include <asm/cacheflush.h>
+#include <asm/system_misc.h>
#include "generic.h"
#include "pm.h"
@@ -349,6 +350,21 @@ static __init void at91_dt_ramc(void)
at91_pm_set_standby(standby);
}
+void at91rm9200_idle(void)
+{
+ /*
+ * Disable the processor clock. The processor will be automatically
+ * re-enabled by an interrupt or by a reset.
+ */
+ writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
+}
+
+void at91sam9_idle(void)
+{
+ writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR);
+ cpu_do_idle();
+}
+
static void __init at91_pm_sram_init(void)
{
struct gen_pool *sram_pool;
@@ -406,7 +422,7 @@ static const struct of_device_id atmel_pmc_ids[] = {
{ /* sentinel */ },
};
-static void __init at91_pm_init(void)
+static void __init at91_pm_init(void (*pm_idle)(void))
{
struct device_node *pmc_np;
@@ -420,6 +436,9 @@ static void __init at91_pm_init(void)
return;
}
+ if (pm_idle)
+ arm_pm_idle = pm_idle;
+
at91_pm_sram_init();
if (at91_suspend_sram_fn)
@@ -440,7 +459,7 @@ void __init at91rm9200_pm_init(void)
at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_MC;
- at91_pm_init();
+ at91_pm_init(at91rm9200_idle);
}
void __init at91sam9260_pm_init(void)
@@ -448,7 +467,7 @@ void __init at91sam9260_pm_init(void)
at91_dt_ramc();
at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
- at91_pm_init();
+ at91_pm_init(at91sam9_idle);
}
void __init at91sam9g45_pm_init(void)
@@ -456,7 +475,7 @@ void __init at91sam9g45_pm_init(void)
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
- at91_pm_init();
+ at91_pm_init(at91sam9_idle);
}
void __init at91sam9x5_pm_init(void)
@@ -464,5 +483,13 @@ void __init at91sam9x5_pm_init(void)
at91_dt_ramc();
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
- at91_pm_init();
+ at91_pm_init(at91sam9_idle);
+}
+
+void __init sama5_pm_init(void)
+{
+ at91_dt_ramc();
+ at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
+ at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
+ at91_pm_init(NULL);
}
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index d9cf6799aec0..df8fdf1cf66d 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -51,7 +51,7 @@ static void __init sama5_dt_device_init(void)
soc_dev = soc_device_to_device(soc);
of_platform_populate(NULL, of_default_bus_match_table, NULL, soc_dev);
- at91sam9x5_pm_init();
+ sama5_pm_init();
}
static const char *const sama5_dt_board_compat[] __initconst = {
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index cfbfea6d641f..c7bd8c17acad 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -44,21 +44,6 @@ struct at91_pmc {
void __iomem *at91_pmc_base;
EXPORT_SYMBOL_GPL(at91_pmc_base);
-void at91rm9200_idle(void)
-{
- /*
- * Disable the processor clock. The processor will be automatically
- * re-enabled by an interrupt or by a reset.
- */
- at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
-}
-
-void at91sam9_idle(void)
-{
- at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
- cpu_do_idle();
-}
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range)
{
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 11/13] ARM: at91: remove useless includes and function prototypes
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (9 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 10/13] ARM: at91: pm: move idle functions to pm.c Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 12/13] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni
` (2 subsequent siblings)
13 siblings, 0 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
Remove leftover from the previous cleanup
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/generic.h | 7 -------
1 file changed, 7 deletions(-)
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index d224e195706a..28ca57a2060f 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -11,13 +11,6 @@
#ifndef _AT91_GENERIC_H
#define _AT91_GENERIC_H
-#include <linux/of.h>
-#include <linux/reboot.h>
-
- /* Map io */
-extern void __init at91_map_io(void);
-extern void __init at91_alt_map_io(void);
-
#ifdef CONFIG_PM
extern void __init at91rm9200_pm_init(void);
extern void __init at91sam9260_pm_init(void);
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 12/13] usb: gadget: atmel: access the PMC using regmap
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (10 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 11/13] ARM: at91: remove useless includes and function prototypes Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base Alexandre Belloni
2015-12-10 17:06 ` [PATCH v3 00/13] ARM: at91: PMC driver rework Boris Brezillon
13 siblings, 0 replies; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
Use regmap to access the PMC to avoid using at91_pmc_read and
at91_pmc_write.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Felipe Balbi <balbi@ti.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 20 ++++++++++----------
drivers/usb/gadget/udc/atmel_usba_udc.h | 2 ++
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index f0f2b066ac08..eb82239dafac 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -17,7 +17,9 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
+#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/atmel_usba_udc.h>
@@ -1888,20 +1890,15 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
#ifdef CONFIG_OF
static void at91sam9rl_toggle_bias(struct usba_udc *udc, int is_on)
{
- unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
-
- if (is_on)
- at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
- else
- at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
+ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
+ is_on ? AT91_PMC_BIASEN : 0);
}
static void at91sam9g45_pulse_bias(struct usba_udc *udc)
{
- unsigned int uckr = at91_pmc_read(AT91_CKGR_UCKR);
-
- at91_pmc_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
- at91_pmc_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
+ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN, 0);
+ regmap_update_bits(udc->pmc, AT91_CKGR_UCKR, AT91_PMC_BIASEN,
+ AT91_PMC_BIASEN);
}
static const struct usba_udc_errata at91sam9rl_errata = {
@@ -1938,6 +1935,9 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
return ERR_PTR(-EINVAL);
udc->errata = match->data;
+ udc->pmc = syscon_regmap_lookup_by_compatible("atmel,at91sam9g45-pmc");
+ if (udc->errata && IS_ERR(udc->pmc))
+ return ERR_CAST(udc->pmc);
udc->num_ep = 0;
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index ea448a344767..3e1c9d589dfa 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -354,6 +354,8 @@ struct usba_udc {
struct dentry *debugfs_root;
struct dentry *debugfs_regs;
#endif
+
+ struct regmap *pmc;
};
static inline struct usba_ep *to_usba_ep(struct usb_ep *ep)
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (11 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 12/13] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni
@ 2015-12-04 17:03 ` Alexandre Belloni
2016-01-15 2:07 ` Stephen Boyd
2015-12-10 17:06 ` [PATCH v3 00/13] ARM: at91: PMC driver rework Boris Brezillon
13 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-04 17:03 UTC (permalink / raw)
To: linux-arm-kernel
at91_pmc_base is not used anymore, remove it along with at91_pmc_read and
at91_pmc_write.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/clk/at91/pmc.c | 5 -----
include/linux/clk/at91_pmc.h | 12 ------------
2 files changed, 17 deletions(-)
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index c7bd8c17acad..60dcac1500e5 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -41,9 +41,6 @@ struct at91_pmc {
u32 imr;
};
-void __iomem *at91_pmc_base;
-EXPORT_SYMBOL_GPL(at91_pmc_base);
-
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range)
{
@@ -249,8 +246,6 @@ static int __init atmel_pmc_probe(struct platform_device *pdev)
int virq;
int ret = 0;
- at91_pmc_base = of_iomap(np, 0);
-
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap))
panic("Could not retrieve syscon regmap");
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 1e6932222e11..17f413bbbedf 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -16,18 +16,6 @@
#ifndef AT91_PMC_H
#define AT91_PMC_H
-#ifndef __ASSEMBLY__
-extern void __iomem *at91_pmc_base;
-
-#define at91_pmc_read(field) \
- readl_relaxed(at91_pmc_base + field)
-
-#define at91_pmc_write(field, value) \
- writel_relaxed(value, at91_pmc_base + field)
-#else
-.extern at91_pmc_base
-#endif
-
#define AT91_PMC_SCER 0x00 /* System Clock Enable Register */
#define AT91_PMC_SCDR 0x04 /* System Clock Disable Register */
--
2.5.0
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 00/13] ARM: at91: PMC driver rework
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
` (12 preceding siblings ...)
2015-12-04 17:03 ` [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base Alexandre Belloni
@ 2015-12-10 17:06 ` Boris Brezillon
2015-12-15 9:22 ` Alexandre Belloni
13 siblings, 1 reply; 31+ messages in thread
From: Boris Brezillon @ 2015-12-10 17:06 UTC (permalink / raw)
To: linux-arm-kernel
On Fri, 4 Dec 2015 18:03:35 +0100
Alexandre Belloni <alexandre.belloni@free-electrons.com> wrote:
> Hi,
>
> This patch set is a cleanup that properly separate drivers needing to access the
> PMC (PM and USB) from the clock driver by exposing the PMC as a syscon.
>
> This also allows to implement a fix for preempt-rt. Currently, at91 platform are
> crashing when using preempt-rt because the irq handler are transformed in
> threaded irq handler but at the time the pmc registers its clocks, it is not
> possible to creat threads, leading to a NULL pointer dereference in the kernel.
>
> The new infrastructure uses polling until it is late enough to register threaded
> irqs.
>
> Note that there is an ugly global spinlock for the peripheral and generated
> clocks. More infrastructure is needed in syscon to get rid of that one. We will
> be working on that.
To the whole series,
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
>
> Changes in v3:
> - rebased on v4.4-rc1 and so included the sama5d2 and the generated clocks
> - fixed comments from Wenyou
>
> Alexandre Belloni (10):
> clk: at91: clk-main: factorize irq handling
> clk: at91: make IRQ optional and register them later
> clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
> clk: at91: pmc: move pmc structures to C file
> ARM: at91: pm: simply call at91_pm_init
> ARM: at91: pm: find and remap the pmc
> ARM: at91: pm: move idle functions to pm.c
> ARM: at91: remove useless includes and function prototypes
> usb: gadget: atmel: access the PMC using regmap
> clk: at91: pmc: drop at91_pmc_base
>
> Boris Brezillon (3):
> clk: at91: make use of syscon to share PMC registers in several
> drivers
> clk: at91: make use of syscon/regmap internally
> clk: at91: only disable available IRQs
>
> arch/arm/mach-at91/Kconfig | 1 +
> arch/arm/mach-at91/at91rm9200.c | 2 -
> arch/arm/mach-at91/at91sam9.c | 2 -
> arch/arm/mach-at91/generic.h | 13 +-
> arch/arm/mach-at91/pm.c | 70 +++++-
> arch/arm/mach-at91/sama5.c | 2 +-
> drivers/clk/at91/clk-generated.c | 95 ++++---
> drivers/clk/at91/clk-h32mx.c | 32 ++-
> drivers/clk/at91/clk-main.c | 430 ++++++++++++++++++--------------
> drivers/clk/at91/clk-master.c | 134 ++++++----
> drivers/clk/at91/clk-peripheral.c | 135 +++++-----
> drivers/clk/at91/clk-pll.c | 190 +++++++++-----
> drivers/clk/at91/clk-plldiv.c | 42 ++--
> drivers/clk/at91/clk-programmable.c | 92 ++++---
> drivers/clk/at91/clk-slow.c | 27 +-
> drivers/clk/at91/clk-smd.c | 54 ++--
> drivers/clk/at91/clk-system.c | 129 +++++++---
> drivers/clk/at91/clk-usb.c | 121 +++++----
> drivers/clk/at91/clk-utmi.c | 116 ++++++---
> drivers/clk/at91/pmc.c | 314 +++++------------------
> drivers/clk/at91/pmc.h | 96 +------
> drivers/usb/gadget/udc/atmel_usba_udc.c | 20 +-
> drivers/usb/gadget/udc/atmel_usba_udc.h | 2 +
> include/linux/clk/at91_pmc.h | 12 -
> 24 files changed, 1111 insertions(+), 1020 deletions(-)
>
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 00/13] ARM: at91: PMC driver rework
2015-12-10 17:06 ` [PATCH v3 00/13] ARM: at91: PMC driver rework Boris Brezillon
@ 2015-12-15 9:22 ` Alexandre Belloni
2016-01-15 2:07 ` Stephen Boyd
0 siblings, 1 reply; 31+ messages in thread
From: Alexandre Belloni @ 2015-12-15 9:22 UTC (permalink / raw)
To: linux-arm-kernel
Stephen,
Do you mind us taking that through the at91 and arm-soc trees?
On 10/12/2015 at 18:06:52 +0100, Boris Brezillon wrote :
> On Fri, 4 Dec 2015 18:03:35 +0100
> Alexandre Belloni <alexandre.belloni@free-electrons.com> wrote:
>
> > Hi,
> >
> > This patch set is a cleanup that properly separate drivers needing to access the
> > PMC (PM and USB) from the clock driver by exposing the PMC as a syscon.
> >
> > This also allows to implement a fix for preempt-rt. Currently, at91 platform are
> > crashing when using preempt-rt because the irq handler are transformed in
> > threaded irq handler but at the time the pmc registers its clocks, it is not
> > possible to creat threads, leading to a NULL pointer dereference in the kernel.
> >
> > The new infrastructure uses polling until it is late enough to register threaded
> > irqs.
> >
> > Note that there is an ugly global spinlock for the peripheral and generated
> > clocks. More infrastructure is needed in syscon to get rid of that one. We will
> > be working on that.
>
> To the whole series,
>
> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
>
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2015-12-04 17:03 ` [PATCH v3 04/13] clk: at91: make IRQ optional and register them later Alexandre Belloni
@ 2016-01-15 2:02 ` Stephen Boyd
2016-01-15 9:39 ` Boris Brezillon
2016-01-22 15:40 ` Sebastian Andrzej Siewior
1 sibling, 1 reply; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:02 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> @@ -686,3 +652,45 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
> }
> CLK_OF_DECLARE(at91sam9x5_clk_main, "atmel,at91sam9x5-clk-main",
> of_at91sam9x5_clk_main_setup);
> +
> +static const struct of_device_id atmel_clk_main_dt_ids[] = {
> + { .compatible = "atmel,at91rm9200-clk-main-osc" },
> + { .compatible = "atmel,at91sam9x5-clk-main-rc-osc" },
> + { .compatible = "atmel,at91sam9x5-clk-main" },
> + { /* sentinel */ }
> +};
> +
> +static int __init atmel_clk_main_probe(struct platform_device *pdev)
> +{
> + struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
> + struct clk_main *clkmain;
> + struct clk_hw *hw;
> + int ret;
> +
> + hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
> + if (!hw)
> + return -ENODEV;
> +
> + clkmain = to_clk_main(hw);
> + clkmain->irq = platform_get_irq(pdev, 0);
> + if (!clkmain->irq)
> + return 0;
Is there any way to get the irq into this probe function without
getting a clk pointer and then unwrapping it to get an irq
value out of the clk_hw wrapper structure? That's a pretty
convoluted design.
> +
> + init_waitqueue_head(&clkmain->wait);
> + irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
> + ret = devm_request_irq(&pdev->dev, clkmain->irq, clk_main_irq_handler,
> + IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk),
> + clkmain);
> + if (ret)
> + clkmain->irq = 0;
> +
> + return ret;
> +}
> +
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc
2015-12-04 17:03 ` [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc Alexandre Belloni
@ 2016-01-15 2:04 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:04 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
> index 5c2b60c5a2a1..38e93174031d 100644
> --- a/arch/arm/mach-at91/pm.c
> +++ b/arch/arm/mach-at91/pm.c
> @@ -35,6 +35,8 @@
> #include "generic.h"
> #include "pm.h"
>
> +void __iomem *pmc;
static?
> +
> /*
> * FIXME: this is needed to communicate between the pinctrl driver and
> * the PM implementation in the machine. Possibly part of the PM
> @@ -85,7 +87,7 @@ static int at91_pm_verify_clocks(void)
> unsigned long scsr;
> int i;
>
> - scsr = at91_pmc_read(AT91_PMC_SCSR);
> + scsr = readl(pmc + AT91_PMC_SCSR);
>
> /* USB must not be using PLLB */
> if ((scsr & at91_pm_data.uhp_udp_mask) != 0) {
> @@ -99,8 +101,7 @@ static int at91_pm_verify_clocks(void)
>
> if ((scsr & (AT91_PMC_PCK0 << i)) == 0)
> continue;
> -
> - css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
> + css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS;
> if (css != AT91_PMC_CSS_SLOW) {
> pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css);
> return 0;
> @@ -143,8 +144,8 @@ static void at91_pm_suspend(suspend_state_t state)
> flush_cache_all();
> outer_disable();
>
> - at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0],
> - at91_ramc_base[1], pm_data);
> + at91_suspend_sram_fn(pmc, at91_ramc_base[0],
> + at91_ramc_base[1], pm_data);
>
> outer_resume();
> }
> @@ -394,13 +395,33 @@ static void __init at91_pm_sram_init(void)
> &at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
> }
>
> +static const struct of_device_id atmel_pmc_ids[] = {
__initconst?
> + { .compatible = "atmel,at91rm9200-pmc" },
> + { .compatible = "atmel,at91sam9260-pmc" },
> + { .compatible = "atmel,at91sam9g45-pmc" },
> + { .compatible = "atmel,at91sam9n12-pmc" },
> + { .compatible = "atmel,at91sam9x5-pmc" },
> + { .compatible = "atmel,sama5d3-pmc" },
> + { .compatible = "atmel,sama5d2-pmc" },
> + { /* sentinel */ },
> +};
> +
> static void __init at91_pm_init(void)
> {
> - at91_pm_sram_init();
> + struct device_node *pmc_np;
>
> if (at91_cpuidle_device.dev.platform_data)
> platform_device_register(&at91_cpuidle_device);
>
> + pmc_np = of_find_matching_node(NULL, atmel_pmc_ids);
> + pmc = of_iomap(pmc_np, 0);
> + if (!pmc) {
> + pr_info("AT91: PM not supported, PMC not found\n");
pr_err?
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file
2015-12-04 17:03 ` [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file Alexandre Belloni
@ 2016-01-15 2:04 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:04 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> pmc.c is now the only user of struct at91_pmc*, move their definition in
> the C file.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
2015-12-04 17:03 ` [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe Alexandre Belloni
@ 2016-01-15 2:04 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:04 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> at91_pmc_init() doesn't do much anymore, merge it in atmel_pmc_probe().
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 05/13] clk: at91: only disable available IRQs
2015-12-04 17:03 ` [PATCH v3 05/13] clk: at91: only disable available IRQs Alexandre Belloni
@ 2016-01-15 2:05 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:05 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> From: Boris Brezillon <boris.brezillon@free-electrons.com>
>
> Only disable available IRQs in case writing to a reserved bit has a harmful
> effect.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 00/13] ARM: at91: PMC driver rework
2015-12-15 9:22 ` Alexandre Belloni
@ 2016-01-15 2:07 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:07 UTC (permalink / raw)
To: linux-arm-kernel
On 12/15, Alexandre Belloni wrote:
> Stephen,
>
> Do you mind us taking that through the at91 and arm-soc trees?
>
>
Sorry I was on vacation for quite some time and only noticed this
email now. I don't have a problem if you want to take it through
arm-soc because of complex merge dependencies. Let's just make
sure all clk patches are acked by clk maintainers first.
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base
2015-12-04 17:03 ` [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base Alexandre Belloni
@ 2016-01-15 2:07 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:07 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> at91_pmc_base is not used anymore, remove it along with at91_pmc_read and
> at91_pmc_write.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling
2015-12-04 17:03 ` [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling Alexandre Belloni
@ 2016-01-15 2:08 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:08 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> The three different irq handlers are doing the same thing, factorize their
> code in a generic irq handler.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 02/13] clk: at91: make use of syscon/regmap internally
2015-12-04 17:03 ` [PATCH v3 02/13] clk: at91: make use of syscon/regmap internally Alexandre Belloni
@ 2016-01-15 2:10 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-15 2:10 UTC (permalink / raw)
To: linux-arm-kernel
On 12/04, Alexandre Belloni wrote:
> diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
> index abc80949e1dd..0b9e0aeef346 100644
> --- a/drivers/clk/at91/clk-generated.c
> +++ b/drivers/clk/at91/clk-generated.c
> @@ -17,9 +17,13 @@
> #include <linux/of.h>
> #include <linux/of_address.h>
> #include <linux/io.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
>
> #include "pmc.h"
>
> +extern spinlock_t pmc_pcr_lock;
You can throw this extern into pmc.h?
> +
> #define PERIPHERAL_MAX 64
> #define PERIPHERAL_ID_MIN 2
>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2016-01-15 2:02 ` Stephen Boyd
@ 2016-01-15 9:39 ` Boris Brezillon
2016-01-16 1:26 ` Stephen Boyd
0 siblings, 1 reply; 31+ messages in thread
From: Boris Brezillon @ 2016-01-15 9:39 UTC (permalink / raw)
To: linux-arm-kernel
Hi Stephen,
On Thu, 14 Jan 2016 18:02:37 -0800
Stephen Boyd <sboyd@codeaurora.org> wrote:
> On 12/04, Alexandre Belloni wrote:
> > @@ -686,3 +652,45 @@ static void __init of_at91sam9x5_clk_main_setup(struct device_node *np)
> > }
> > CLK_OF_DECLARE(at91sam9x5_clk_main, "atmel,at91sam9x5-clk-main",
> > of_at91sam9x5_clk_main_setup);
> > +
> > +static const struct of_device_id atmel_clk_main_dt_ids[] = {
> > + { .compatible = "atmel,at91rm9200-clk-main-osc" },
> > + { .compatible = "atmel,at91sam9x5-clk-main-rc-osc" },
> > + { .compatible = "atmel,at91sam9x5-clk-main" },
> > + { /* sentinel */ }
> > +};
> > +
> > +static int __init atmel_clk_main_probe(struct platform_device *pdev)
> > +{
> > + struct of_phandle_args clkspec = { .np = pdev->dev.of_node};
> > + struct clk_main *clkmain;
> > + struct clk_hw *hw;
> > + int ret;
> > +
> > + hw = __clk_get_hw(of_clk_get_from_provider(&clkspec));
> > + if (!hw)
> > + return -ENODEV;
> > +
> > + clkmain = to_clk_main(hw);
> > + clkmain->irq = platform_get_irq(pdev, 0);
> > + if (!clkmain->irq)
> > + return 0;
>
> Is there any way to get the irq into this probe function without
> getting a clk pointer and then unwrapping it to get an irq
> value out of the clk_hw wrapper structure? That's a pretty
> convoluted design.
Not sure I get what you're suggesting, but the only solution I see to
avoid this "get main clk pointer dance" would be to have a global
variable storing the clk_main instance (or a list of clk_main
instances).
The thing is, I'd like to avoid adding new global variables in this
clk drivers as much as possible. Moreover, the core is already taking
care of keeping the list of all registered clks, with their associated
of_node, so, is there a real point in creating a duplicated association
list in this driver too?
Maybe we could create an of_clk_hw_get_from_provider(), which would
prevent the creation of this useless per-user clk instance (see the patch
below).
>
> > +
> > + init_waitqueue_head(&clkmain->wait);
> > + irq_set_status_flags(clkmain->irq, IRQ_NOAUTOEN);
> > + ret = devm_request_irq(&pdev->dev, clkmain->irq, clk_main_irq_handler,
> > + IRQF_TRIGGER_HIGH, __clk_get_name(hw->clk),
> > + clkmain);
> > + if (ret)
> > + clkmain->irq = 0;
> > +
You should probably call clk_put() on the pointer returned by
of_clk_get_from_provider(&clkspec).
> > + return ret;
> > +}
> > +
>
Best Regards,
Boris
--- >8 ---
>From a83670d29504e256bdc97c04f0dfd96a7d6842bf Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Date: Fri, 15 Jan 2016 10:36:23 +0100
Subject: [PATCH] clk: add a function to retrieve a clk_hw instance from a
clkspec definition
of_clk_hw_get_from_provider() is providing a way to retrieve a clk_hw
instance from a clkspec definition. Which is usefull in case a clk driver
wants to get one of its own instance from a clkspec, without allocating a
new per-user clk struct.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/clk/clk.c | 36 ++++++++++++++++++++++++++++++++++++
include/linux/clk-provider.h | 1 +
2 files changed, 37 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index f13c3f4..fbef1b7 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3001,6 +3001,42 @@ void of_clk_del_provider(struct device_node *np)
}
EXPORT_SYMBOL_GPL(of_clk_del_provider);
+/**
+ * of_clk_hw_get_from_provider() - Look for a clk_hw instance registered with
+ * the given clkspec definition.
+ * @clkspec: pointer to a clock specifier data structure
+ *
+ * This function looks up a struct clk_hw from the registered list of clock
+ * providers, an input is a clock specifier data structure as returned
+ * from the of_parse_phandle_with_args() function call.
+ */
+struct clk_hw *of_clk_hw_get_from_provider(struct of_phandle_args *clkspec)
+{
+ struct clk_hw *clk_hw = ERR_PTR(-EPROBE_DEFER);
+ struct of_clk_provider *provider;
+
+ if (!clkspec)
+ return ERR_PTR(-EINVAL);
+
+ /* Check if we have such a provider in our array */
+ mutex_lock(&of_clk_mutex);
+ list_for_each_entry(provider, &of_clk_providers, link) {
+ struct clk *clk = ERR_PTR(-EPROBE_DEFER);
+
+ if (provider->node == clkspec->np)
+ clk = provider->get(clkspec, provider->data);
+
+ if (!IS_ERR(clk)) {
+ clk_hw = __clk_get_hw(clk);
+ break;
+ }
+ }
+ mutex_unlock(&of_clk_mutex);
+
+ return clk_hw;
+}
+EXPORT_SYMBOL_GPL(of_clk_hw_get_from_provider);
+
struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec,
const char *dev_id, const char *con_id)
{
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index c56988a..bb62517 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -645,6 +645,7 @@ void devm_clk_unregister(struct device *dev, struct clk *clk);
const char *__clk_get_name(const struct clk *clk);
const char *clk_hw_get_name(const struct clk_hw *hw);
struct clk_hw *__clk_get_hw(struct clk *clk);
+struct clk_hw *of_clk_hw_get_from_provider(struct of_phandle_args *clkspec);
unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
^ permalink raw reply related [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2016-01-15 9:39 ` Boris Brezillon
@ 2016-01-16 1:26 ` Stephen Boyd
2016-01-16 12:45 ` Boris Brezillon
0 siblings, 1 reply; 31+ messages in thread
From: Stephen Boyd @ 2016-01-16 1:26 UTC (permalink / raw)
To: linux-arm-kernel
On 01/15, Boris Brezillon wrote:
> Hi Stephen,
>
> On Thu, 14 Jan 2016 18:02:37 -0800
> Stephen Boyd <sboyd@codeaurora.org> wrote:
> >
> > Is there any way to get the irq into this probe function without
> > getting a clk pointer and then unwrapping it to get an irq
> > value out of the clk_hw wrapper structure? That's a pretty
> > convoluted design.
>
> Not sure I get what you're suggesting, but the only solution I see to
> avoid this "get main clk pointer dance" would be to have a global
> variable storing the clk_main instance (or a list of clk_main
> instances).
> The thing is, I'd like to avoid adding new global variables in this
> clk drivers as much as possible. Moreover, the core is already taking
> care of keeping the list of all registered clks, with their associated
> of_node, so, is there a real point in creating a duplicated association
> list in this driver too?
Ok I have to admit I'm a little confused. I thought we were
getting the irq from the clkmain structure so that we could
request it here in the probe function. But we're really assigning
the irq so that we can enable/disable/free it later on?
So my new question is if we can register the clocks at the same
time as the "platform device" (really a clock) probes. The
correct design was probably to have pmc be a big platform device
and have it register clocks that it knows exist inside it based
on the compatible string. And it would also know which irqs (or
enforce some ordering of irqs) to assign to which clocks.
It looks like we totally missed that though.... so now we have
many DT nodes that are also platform devices. So if we can do it
at the same time as irq requests then we're good and the clk_hw
structure is in the same scope. If not, then we should probably
just let of_clk_hw_get_from_provider() happen (and it needs to
happen for other reasons anyway) and call it a day.
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2016-01-16 1:26 ` Stephen Boyd
@ 2016-01-16 12:45 ` Boris Brezillon
2016-01-20 22:04 ` Stephen Boyd
0 siblings, 1 reply; 31+ messages in thread
From: Boris Brezillon @ 2016-01-16 12:45 UTC (permalink / raw)
To: linux-arm-kernel
On Fri, 15 Jan 2016 17:26:12 -0800
Stephen Boyd <sboyd@codeaurora.org> wrote:
> On 01/15, Boris Brezillon wrote:
> > Hi Stephen,
> >
> > On Thu, 14 Jan 2016 18:02:37 -0800
> > Stephen Boyd <sboyd@codeaurora.org> wrote:
> > >
> > > Is there any way to get the irq into this probe function without
> > > getting a clk pointer and then unwrapping it to get an irq
> > > value out of the clk_hw wrapper structure? That's a pretty
> > > convoluted design.
> >
> > Not sure I get what you're suggesting, but the only solution I see to
> > avoid this "get main clk pointer dance" would be to have a global
> > variable storing the clk_main instance (or a list of clk_main
> > instances).
> > The thing is, I'd like to avoid adding new global variables in this
> > clk drivers as much as possible. Moreover, the core is already taking
> > care of keeping the list of all registered clks, with their associated
> > of_node, so, is there a real point in creating a duplicated association
> > list in this driver too?
>
> Ok I have to admit I'm a little confused. I thought we were
> getting the irq from the clkmain structure so that we could
> request it here in the probe function. But we're really assigning
> the irq so that we can enable/disable/free it later on?
>
> So my new question is if we can register the clocks at the same
> time as the "platform device" (really a clock) probes. The
> correct design was probably to have pmc be a big platform device
> and have it register clocks that it knows exist inside it based
> on the compatible string. And it would also know which irqs (or
> enforce some ordering of irqs) to assign to which clocks.
>
> It looks like we totally missed that though.... so now we have
> many DT nodes that are also platform devices. So if we can do it
> at the same time as irq requests then we're good and the clk_hw
> structure is in the same scope. If not, then we should probably
> just let of_clk_hw_get_from_provider() happen (and it needs to
> happen for other reasons anyway) and call it a day.
>
Actually the PMC is not only exposing clocks. You have a bit in one of
its registers that is used by a USB driver to enable a BIAS, and
probably other things that are not directly related to clocks. Hence
the idea to declare the PMC as an MFD/syscon device (which is in turn
providing an IRQ chip).
Note that the irq problem we're talking about cannot be addressed by
simply moving everything into the ->probe() function of the platform
driver: we need the clock quite early in the boot process (it's
required for the initial clocksource device), in the other hand you
can't request threaded irqs when you're so early in the boot process,
and this becomes a problem when you apply the preempt-RT patch which
moves all standard irqs to threaded ones.
So the idea was to use polling instead of the irq event until we are
able to register threaded irqs, and then switch to an irq-able approach
once everything is in place (platform devices are probed after the
thread infrastructure has been setup, which is why we used this trick).
This whole series was actually made for 2 reasons:
- expose the PMC as a syscon device so that the USB driver can access
it's register without having to expose a global void __iomem *
variable
- address the preemt-RT/threaded irq problem I explained above
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2016-01-16 12:45 ` Boris Brezillon
@ 2016-01-20 22:04 ` Stephen Boyd
0 siblings, 0 replies; 31+ messages in thread
From: Stephen Boyd @ 2016-01-20 22:04 UTC (permalink / raw)
To: linux-arm-kernel
On 01/16, Boris Brezillon wrote:
> Actually the PMC is not only exposing clocks. You have a bit in one of
> its registers that is used by a USB driver to enable a BIAS, and
> probably other things that are not directly related to clocks. Hence
> the idea to declare the PMC as an MFD/syscon device (which is in turn
> providing an IRQ chip).
>
> Note that the irq problem we're talking about cannot be addressed by
> simply moving everything into the ->probe() function of the platform
> driver: we need the clock quite early in the boot process (it's
> required for the initial clocksource device), in the other hand you
> can't request threaded irqs when you're so early in the boot process,
> and this becomes a problem when you apply the preempt-RT patch which
> moves all standard irqs to threaded ones.
> So the idea was to use polling instead of the irq event until we are
> able to register threaded irqs, and then switch to an irq-able approach
> once everything is in place (platform devices are probed after the
> thread infrastructure has been setup, which is why we used this trick).
Just one more thought. If we had one platform driver for the
entire PMC could we also have an OF_CLK_DECLARE for it as well?
Then that OF_CLK_DECLARE could run early, register whatever
clocks are essential for the clocksource to work, and defer the
rest of the clock registration to when the device driver probes?
We'd still need some sort of global list of clocks that we
registered early, and this list might need to be per PMC if
there's more than one PMC, but we'd have all the clk_hw pointers
available when the platform driver probed. Oh and we'd need
clk_get() to return PROBE_DEFER too so that consumer drivers
could be deferred until the PMC driver probes.
I suppose this would be making more global variables, which isn't
preferred, so let's worry about this clk_hw vs clk pointer
problem later. We'll have to keep this driver in mind when we're
converting over clk providers to registering clk_hw pointers with
the of clk provider layer.
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2015-12-04 17:03 ` [PATCH v3 04/13] clk: at91: make IRQ optional and register them later Alexandre Belloni
2016-01-15 2:02 ` Stephen Boyd
@ 2016-01-22 15:40 ` Sebastian Andrzej Siewior
2016-01-25 22:28 ` Alexandre Belloni
1 sibling, 1 reply; 31+ messages in thread
From: Sebastian Andrzej Siewior @ 2016-01-22 15:40 UTC (permalink / raw)
To: linux-arm-kernel
On 2015-12-04 18:03:39 [+0100], Alexandre Belloni wrote:
> diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
> index 295b17b9c689..296d20a29c6c 100644
> --- a/drivers/clk/at91/pmc.c
> +++ b/drivers/clk/at91/pmc.c
> @@ -20,6 +20,9 @@
?
> + pmc->irqdomain = irq_domain_add_linear(pdev->dev.of_node, 32,
> + &pmc_irq_ops, pmc);
> + if (!pmc->irqdomain)
> + return 0;
>
> -static void __init of_at91sam9n12_pmc_setup(struct device_node *np)
> -{
> - of_at91_pmc_setup(np, &at91sam9n12_caps);
> -}
> -CLK_OF_DECLARE(at91sam9n12_clk_pmc, "atmel,at91sam9n12-pmc",
> - of_at91sam9n12_pmc_setup);
> + regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
> + ret = request_irq(pmc->virq, pmc_irq_handler,
> + IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc);
You need IRQF_NOTHREAD here becuase pmc_irq_handler() is demuxing
interrupts / invoking generic_handle_irq().
However regmap_read() inside pmc_irq_handler() is taking a sleeping lock
on -RT so this is not going to fly. So either get rid regmap_read() in
the handler or use handle_nested_irq() instead.
> + if (ret)
> + return ret;
Sebastian
^ permalink raw reply [flat|nested] 31+ messages in thread
* [PATCH v3 04/13] clk: at91: make IRQ optional and register them later
2016-01-22 15:40 ` Sebastian Andrzej Siewior
@ 2016-01-25 22:28 ` Alexandre Belloni
0 siblings, 0 replies; 31+ messages in thread
From: Alexandre Belloni @ 2016-01-25 22:28 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
On 22/01/2016 at 16:40:35 +0100, Sebastian Andrzej Siewior wrote :
> On 2015-12-04 18:03:39 [+0100], Alexandre Belloni wrote:
> > diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
> > index 295b17b9c689..296d20a29c6c 100644
> > --- a/drivers/clk/at91/pmc.c
> > +++ b/drivers/clk/at91/pmc.c
> > @@ -20,6 +20,9 @@
> ?
> > + pmc->irqdomain = irq_domain_add_linear(pdev->dev.of_node, 32,
> > + &pmc_irq_ops, pmc);
> > + if (!pmc->irqdomain)
> > + return 0;
> >
> > -static void __init of_at91sam9n12_pmc_setup(struct device_node *np)
> > -{
> > - of_at91_pmc_setup(np, &at91sam9n12_caps);
> > -}
> > -CLK_OF_DECLARE(at91sam9n12_clk_pmc, "atmel,at91sam9n12-pmc",
> > - of_at91sam9n12_pmc_setup);
> > + regmap_write(pmc->regmap, AT91_PMC_IDR, 0xffffffff);
> > + ret = request_irq(pmc->virq, pmc_irq_handler,
> > + IRQF_SHARED | IRQF_COND_SUSPEND, "pmc", pmc);
>
> You need IRQF_NOTHREAD here becuase pmc_irq_handler() is demuxing
> interrupts / invoking generic_handle_irq().
> However regmap_read() inside pmc_irq_handler() is taking a sleeping lock
> on -RT so this is not going to fly. So either get rid regmap_read() in
> the handler or use handle_nested_irq() instead.
>
So, using handle_nested_irq() is actually quite impractical because it
has to be called from a threaded irq handler. So we either need to use
IRQF_ONESHOT which is not possible because the IRQ is shared
with the PIT (unless we take Thomas' IRQF_COND_ONESHOT patch).
I think we may as well stay simple and remove the whole irq handling and
only do polling on the status register. As the series is done right now,
this only has an impact during the clocks prepare(). As in that case it
would not be sleeping anymore, we can also transform those prepare() in
enable().
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 31+ messages in thread
end of thread, other threads:[~2016-01-25 22:28 UTC | newest]
Thread overview: 31+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-12-04 17:03 [PATCH v3 00/13] ARM: at91: PMC driver rework Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 01/13] clk: at91: make use of syscon to share PMC registers in several drivers Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 02/13] clk: at91: make use of syscon/regmap internally Alexandre Belloni
2016-01-15 2:10 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 03/13] clk: at91: clk-main: factorize irq handling Alexandre Belloni
2016-01-15 2:08 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 04/13] clk: at91: make IRQ optional and register them later Alexandre Belloni
2016-01-15 2:02 ` Stephen Boyd
2016-01-15 9:39 ` Boris Brezillon
2016-01-16 1:26 ` Stephen Boyd
2016-01-16 12:45 ` Boris Brezillon
2016-01-20 22:04 ` Stephen Boyd
2016-01-22 15:40 ` Sebastian Andrzej Siewior
2016-01-25 22:28 ` Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 05/13] clk: at91: only disable available IRQs Alexandre Belloni
2016-01-15 2:05 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 06/13] clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe Alexandre Belloni
2016-01-15 2:04 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 07/13] clk: at91: pmc: move pmc structures to C file Alexandre Belloni
2016-01-15 2:04 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 08/13] ARM: at91: pm: simply call at91_pm_init Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 09/13] ARM: at91: pm: find and remap the pmc Alexandre Belloni
2016-01-15 2:04 ` Stephen Boyd
2015-12-04 17:03 ` [PATCH v3 10/13] ARM: at91: pm: move idle functions to pm.c Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 11/13] ARM: at91: remove useless includes and function prototypes Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 12/13] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni
2015-12-04 17:03 ` [PATCH v3 13/13] clk: at91: pmc: drop at91_pmc_base Alexandre Belloni
2016-01-15 2:07 ` Stephen Boyd
2015-12-10 17:06 ` [PATCH v3 00/13] ARM: at91: PMC driver rework Boris Brezillon
2015-12-15 9:22 ` Alexandre Belloni
2016-01-15 2:07 ` Stephen Boyd
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