* [V4 patch 01/15] cpuidle: remove en_core_tk_irqen flag
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 02/15] ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu Daniel Lezcano
` (14 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
The en_core_tk_irqen flag is set in all the cpuidle driver which
means it is not necessary to specify this flag.
Remove the flag and the code related to it.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org> # for mach-omap2/*
---
arch/arm/mach-at91/cpuidle.c | 1 -
arch/arm/mach-davinci/cpuidle.c | 1 -
arch/arm/mach-exynos/cpuidle.c | 1 -
arch/arm/mach-imx/cpuidle-imx6q.c | 1 -
arch/arm/mach-imx/pm-imx5.c | 1 -
arch/arm/mach-omap2/cpuidle34xx.c | 1 -
arch/arm/mach-omap2/cpuidle44xx.c | 1 -
arch/arm/mach-s3c64xx/cpuidle.c | 1 -
arch/arm/mach-shmobile/cpuidle.c | 1 -
arch/arm/mach-shmobile/pm-sh7372.c | 1 -
arch/arm/mach-tegra/cpuidle-tegra114.c | 1 -
arch/arm/mach-tegra/cpuidle-tegra20.c | 1 -
arch/arm/mach-tegra/cpuidle-tegra30.c | 1 -
arch/arm/mach-ux500/cpuidle.c | 1 -
arch/powerpc/platforms/pseries/processor_idle.c | 1 -
arch/sh/kernel/cpu/shmobile/cpuidle.c | 1 -
arch/x86/kernel/apm_32.c | 1 -
drivers/acpi/processor_idle.c | 1 -
drivers/cpuidle/cpuidle-calxeda.c | 1 -
drivers/cpuidle/cpuidle-kirkwood.c | 1 -
drivers/cpuidle/cpuidle.c | 72 ++++++-----------------
drivers/idle/intel_idle.c | 1 -
include/linux/cpuidle.h | 11 ----
23 files changed, 18 insertions(+), 86 deletions(-)
diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
index 0c63815..0130df7 100644
--- a/arch/arm/mach-at91/cpuidle.c
+++ b/arch/arm/mach-at91/cpuidle.c
@@ -47,7 +47,6 @@ static int at91_enter_idle(struct cpuidle_device *dev,
static struct cpuidle_driver at91_idle_driver = {
.name = "at91_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
.enter = at91_enter_idle,
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
index 22d6d4a..c2887c5 100644
--- a/arch/arm/mach-davinci/cpuidle.c
+++ b/arch/arm/mach-davinci/cpuidle.c
@@ -62,7 +62,6 @@ static int davinci_enter_idle(struct cpuidle_device *dev,
static struct cpuidle_driver davinci_idle_driver = {
.name = "cpuidle-davinci",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
.enter = davinci_enter_idle,
diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
index fcfe025..498a7a2 100644
--- a/arch/arm/mach-exynos/cpuidle.c
+++ b/arch/arm/mach-exynos/cpuidle.c
@@ -58,7 +58,6 @@ static DEFINE_PER_CPU(struct cpuidle_device, exynos4_cpuidle_device);
static struct cpuidle_driver exynos4_idle_driver = {
.name = "exynos4_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
};
/* Ext-GIC nIRQ/nFIQ is the only wakeup source in AFTR */
diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c
index a783a63..e2739ad 100644
--- a/arch/arm/mach-imx/cpuidle-imx6q.c
+++ b/arch/arm/mach-imx/cpuidle-imx6q.c
@@ -45,7 +45,6 @@ done:
static struct cpuidle_driver imx6q_cpuidle_driver = {
.name = "imx6q_cpuidle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
/* WFI */
ARM_CPUIDLE_WFI_STATE,
diff --git a/arch/arm/mach-imx/pm-imx5.c b/arch/arm/mach-imx/pm-imx5.c
index f67fd7e..4b52b3e 100644
--- a/arch/arm/mach-imx/pm-imx5.c
+++ b/arch/arm/mach-imx/pm-imx5.c
@@ -164,7 +164,6 @@ static int imx5_cpuidle_enter(struct cpuidle_device *dev,
static struct cpuidle_driver imx5_cpuidle_driver = {
.name = "imx5_cpuidle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states[0] = {
.enter = imx5_cpuidle_enter,
.exit_latency = 2,
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 0ee39a8..20785b2 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -264,7 +264,6 @@ static DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
static struct cpuidle_driver omap3_idle_driver = {
.name = "omap3_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
{
.enter = omap3_enter_idle_bm,
diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
index 8a0e43c..d1bfb21 100644
--- a/arch/arm/mach-omap2/cpuidle44xx.c
+++ b/arch/arm/mach-omap2/cpuidle44xx.c
@@ -164,7 +164,6 @@ static DEFINE_PER_CPU(struct cpuidle_device, omap_idle_dev);
static struct cpuidle_driver omap4_idle_driver = {
.name = "omap4_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
{
/* C1 - CPU0 ON + CPU1 ON + MPU ON */
diff --git a/arch/arm/mach-s3c64xx/cpuidle.c b/arch/arm/mach-s3c64xx/cpuidle.c
index ead5fab..852ff16 100644
--- a/arch/arm/mach-s3c64xx/cpuidle.c
+++ b/arch/arm/mach-s3c64xx/cpuidle.c
@@ -45,7 +45,6 @@ static DEFINE_PER_CPU(struct cpuidle_device, s3c64xx_cpuidle_device);
static struct cpuidle_driver s3c64xx_cpuidle_driver = {
.name = "s3c64xx_cpuidle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
{
.enter = s3c64xx_enter_idle,
diff --git a/arch/arm/mach-shmobile/cpuidle.c b/arch/arm/mach-shmobile/cpuidle.c
index c872ae8..d671ae9 100644
--- a/arch/arm/mach-shmobile/cpuidle.c
+++ b/arch/arm/mach-shmobile/cpuidle.c
@@ -20,7 +20,6 @@ static struct cpuidle_device shmobile_cpuidle_dev;
static struct cpuidle_driver shmobile_cpuidle_default_driver = {
.name = "shmobile_cpuidle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states[0] = ARM_CPUIDLE_WFI_STATE,
.safe_state_index = 0, /* C1 */
.state_count = 1,
diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c
index fbef7b9..dec9293 100644
--- a/arch/arm/mach-shmobile/pm-sh7372.c
+++ b/arch/arm/mach-shmobile/pm-sh7372.c
@@ -410,7 +410,6 @@ static int sh7372_enter_a4s(struct cpuidle_device *dev,
static struct cpuidle_driver sh7372_cpuidle_driver = {
.name = "sh7372_cpuidle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.state_count = 5,
.safe_state_index = 0, /* C1 */
.states[0] = ARM_CPUIDLE_WFI_STATE,
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c
index c527cff..c5fadf9 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra114.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra114.c
@@ -23,7 +23,6 @@
static struct cpuidle_driver tegra_idle_driver = {
.name = "tegra_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.state_count = 1,
.states = {
[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
diff --git a/arch/arm/mach-tegra/cpuidle-tegra20.c b/arch/arm/mach-tegra/cpuidle-tegra20.c
index b94d76a..f1f6ac4 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra20.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra20.c
@@ -51,7 +51,6 @@ static int tegra20_idle_lp2_coupled(struct cpuidle_device *dev,
static struct cpuidle_driver tegra_idle_driver = {
.name = "tegra_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
ARM_CPUIDLE_WFI_STATE_PWR(600),
#ifdef CONFIG_PM_SLEEP
diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c
index c4e01fe..f6a0c72 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra30.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra30.c
@@ -43,7 +43,6 @@ static int tegra30_idle_lp2(struct cpuidle_device *dev,
static struct cpuidle_driver tegra_idle_driver = {
.name = "tegra_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
#ifdef CONFIG_PM_SLEEP
.state_count = 2,
#else
diff --git a/arch/arm/mach-ux500/cpuidle.c b/arch/arm/mach-ux500/cpuidle.c
index 1b16d9e..c29c1bf 100644
--- a/arch/arm/mach-ux500/cpuidle.c
+++ b/arch/arm/mach-ux500/cpuidle.c
@@ -94,7 +94,6 @@ out:
static struct cpuidle_driver ux500_idle_driver = {
.name = "ux500_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
ARM_CPUIDLE_WFI_STATE,
{
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index a197120..4644efa0 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -25,7 +25,6 @@
struct cpuidle_driver pseries_idle_driver = {
.name = "pseries_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
};
#define MAX_IDLE_STATE_COUNT 2
diff --git a/arch/sh/kernel/cpu/shmobile/cpuidle.c b/arch/sh/kernel/cpu/shmobile/cpuidle.c
index ea6ab02..fdfe57f4 100644
--- a/arch/sh/kernel/cpu/shmobile/cpuidle.c
+++ b/arch/sh/kernel/cpu/shmobile/cpuidle.c
@@ -55,7 +55,6 @@ static struct cpuidle_device cpuidle_dev;
static struct cpuidle_driver cpuidle_driver = {
.name = "sh_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
{
.exit_latency = 1,
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 66b5faf..53a4e27 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -373,7 +373,6 @@ static int apm_cpu_idle(struct cpuidle_device *dev,
static struct cpuidle_driver apm_idle_driver = {
.name = "apm_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states = {
{ /* entry 0 is for polling */ },
{ /* entry 1 is for APM idle */
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ee255c6..f0df2c9 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -918,7 +918,6 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
struct cpuidle_driver acpi_idle_driver = {
.name = "acpi_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
};
/**
diff --git a/drivers/cpuidle/cpuidle-calxeda.c b/drivers/cpuidle/cpuidle-calxeda.c
index e1aab38..a3b56f5 100644
--- a/drivers/cpuidle/cpuidle-calxeda.c
+++ b/drivers/cpuidle/cpuidle-calxeda.c
@@ -100,7 +100,6 @@ static void calxeda_idle_cpuidle_devices_uninit(void)
static struct cpuidle_driver calxeda_idle_driver = {
.name = "calxeda_idle",
- .en_core_tk_irqen = 1,
.states = {
ARM_CPUIDLE_WFI_STATE,
{
diff --git a/drivers/cpuidle/cpuidle-kirkwood.c b/drivers/cpuidle/cpuidle-kirkwood.c
index 53aad73..6f31524 100644
--- a/drivers/cpuidle/cpuidle-kirkwood.c
+++ b/drivers/cpuidle/cpuidle-kirkwood.c
@@ -41,7 +41,6 @@ static int kirkwood_enter_idle(struct cpuidle_device *dev,
static struct cpuidle_driver kirkwood_idle_driver = {
.name = "kirkwood_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
.states[0] = ARM_CPUIDLE_WFI_STATE,
.states[1] = {
.enter = kirkwood_enter_idle,
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index c500370..0da795b 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -43,24 +43,6 @@ void disable_cpuidle(void)
static int __cpuidle_register_device(struct cpuidle_device *dev);
-static inline int cpuidle_enter(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index)
-{
- struct cpuidle_state *target_state = &drv->states[index];
- return target_state->enter(dev, drv, index);
-}
-
-static inline int cpuidle_enter_tk(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index)
-{
- return cpuidle_wrap_enter(dev, drv, index, cpuidle_enter);
-}
-
-typedef int (*cpuidle_enter_t)(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index);
-
-static cpuidle_enter_t cpuidle_enter_ops;
-
/**
* cpuidle_play_dead - cpu off-lining
*
@@ -90,11 +72,27 @@ int cpuidle_play_dead(void)
* @next_state: index into drv->states of the state to enter
*/
int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
- int next_state)
+ int index)
{
int entered_state;
- entered_state = cpuidle_enter_ops(dev, drv, next_state);
+ struct cpuidle_state *target_state = &drv->states[index];
+ ktime_t time_start, time_end;
+ s64 diff;
+
+ time_start = ktime_get();
+
+ entered_state = target_state->enter(dev, drv, index);
+
+ time_end = ktime_get();
+
+ local_irq_enable();
+
+ diff = ktime_to_us(ktime_sub(time_end, time_start));
+ if (diff > INT_MAX)
+ diff = INT_MAX;
+
+ dev->last_residency = (int) diff;
if (entered_state >= 0) {
/* Update cpuidle counters */
@@ -231,37 +229,6 @@ void cpuidle_resume(void)
mutex_unlock(&cpuidle_lock);
}
-/**
- * cpuidle_wrap_enter - performs timekeeping and irqen around enter function
- * @dev: pointer to a valid cpuidle_device object
- * @drv: pointer to a valid cpuidle_driver object
- * @index: index of the target cpuidle state.
- */
-int cpuidle_wrap_enter(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index,
- int (*enter)(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index))
-{
- ktime_t time_start, time_end;
- s64 diff;
-
- time_start = ktime_get();
-
- index = enter(dev, drv, index);
-
- time_end = ktime_get();
-
- local_irq_enable();
-
- diff = ktime_to_us(ktime_sub(time_end, time_start));
- if (diff > INT_MAX)
- diff = INT_MAX;
-
- dev->last_residency = (int) diff;
-
- return index;
-}
-
#ifdef CONFIG_ARCH_HAS_CPU_RELAX
static int poll_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
@@ -333,9 +300,6 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
return ret;
}
- cpuidle_enter_ops = drv->en_core_tk_irqen ?
- cpuidle_enter_tk : cpuidle_enter;
-
poll_idle_init(drv);
ret = cpuidle_add_device_sysfs(dev);
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 10541da..0e8fab1 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -71,7 +71,6 @@
static struct cpuidle_driver intel_idle_driver = {
.name = "intel_idle",
.owner = THIS_MODULE,
- .en_core_tk_irqen = 1,
};
/* intel_idle.max_cstate=0 disables driver */
static int max_cstate = CPUIDLE_STATE_MAX - 1;
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index fc3e580..79e3811 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -105,8 +105,6 @@ struct cpuidle_driver {
struct module *owner;
int refcnt;
- /* set to 1 to use the core cpuidle time keeping (for all states). */
- unsigned int en_core_tk_irqen:1;
/* used by the cpuidle framework to setup the broadcast timer */
unsigned int bctimer:1;
/* states array must be ordered in decreasing power consumption */
@@ -132,10 +130,6 @@ extern void cpuidle_pause(void);
extern void cpuidle_resume(void);
extern int cpuidle_enable_device(struct cpuidle_device *dev);
extern void cpuidle_disable_device(struct cpuidle_device *dev);
-extern int cpuidle_wrap_enter(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index,
- int (*enter)(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index));
extern int cpuidle_play_dead(void);
extern struct cpuidle_driver *cpuidle_get_cpu_driver(struct cpuidle_device *dev);
@@ -162,11 +156,6 @@ static inline void cpuidle_resume(void) { }
static inline int cpuidle_enable_device(struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_disable_device(struct cpuidle_device *dev) { }
-static inline int cpuidle_wrap_enter(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index,
- int (*enter)(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index))
-{ return -ENODEV; }
static inline int cpuidle_play_dead(void) {return -ENODEV; }
#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 02/15] ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 01/15] cpuidle: remove en_core_tk_irqen flag Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-30 9:16 ` Chander Kashyap
2013-04-23 8:54 ` [V4 patch 03/15] cpuidle: make a single register function for all Daniel Lezcano
` (13 subsequent siblings)
15 siblings, 1 reply; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
All the drivers are using, in their initialization function, the
for_each_possible_cpu macro.
Using for_each_online_cpu means the driver must handle the initialization
of the cpuidle device when a cpu is up which is not the case here.
Change the macro to for_each_possible_cpu as that fix the hotplug
initialization and make the initialization routine consistent with the
rest of the code in the different drivers.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
arch/arm/mach-ux500/cpuidle.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-ux500/cpuidle.c b/arch/arm/mach-ux500/cpuidle.c
index c29c1bf..5657d4a 100644
--- a/arch/arm/mach-ux500/cpuidle.c
+++ b/arch/arm/mach-ux500/cpuidle.c
@@ -125,7 +125,7 @@ int __init ux500_idle_init(void)
return ret;
}
- for_each_online_cpu(cpu) {
+ for_each_possible(cpu) {
device = &per_cpu(ux500_cpuidle_device, cpu);
device->cpu = cpu;
ret = cpuidle_register_device(device);
@@ -139,7 +139,7 @@ out:
return ret;
out_unregister:
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
device = &per_cpu(ux500_cpuidle_device, cpu);
cpuidle_unregister_device(device);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [V4 patch 02/15] ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu
2013-04-23 8:54 ` [V4 patch 02/15] ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu Daniel Lezcano
@ 2013-04-30 9:16 ` Chander Kashyap
0 siblings, 0 replies; 22+ messages in thread
From: Chander Kashyap @ 2013-04-30 9:16 UTC (permalink / raw)
To: Daniel Lezcano
Cc: rjw, andrew, kgene.kim, jason, horms, Patch Tracking, khilman,
magnus.damm, linux-pm, Stephen Warren, nsekhar, rob.herring,
deepthi, tony, lethal, linaro-kernel, kernel, josephl, jkosina,
plagnioj, linux, linux-arm-kernel
On 23 April 2013 14:24, Daniel Lezcano <daniel.lezcano@linaro.org> wrote:
> All the drivers are using, in their initialization function, the
> for_each_possible_cpu macro.
>
> Using for_each_online_cpu means the driver must handle the initialization
> of the cpuidle device when a cpu is up which is not the case here.
>
> Change the macro to for_each_possible_cpu as that fix the hotplug
> initialization and make the initialization routine consistent with the
> rest of the code in the different drivers.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> arch/arm/mach-ux500/cpuidle.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-ux500/cpuidle.c b/arch/arm/mach-ux500/cpuidle.c
> index c29c1bf..5657d4a 100644
> --- a/arch/arm/mach-ux500/cpuidle.c
> +++ b/arch/arm/mach-ux500/cpuidle.c
> @@ -125,7 +125,7 @@ int __init ux500_idle_init(void)
> return ret;
> }
>
> - for_each_online_cpu(cpu) {
> + for_each_possible(cpu) {
for_each_possible(cpu) or for_each_possible_cpu(cpu) ?
> device = &per_cpu(ux500_cpuidle_device, cpu);
> device->cpu = cpu;
> ret = cpuidle_register_device(device);
> @@ -139,7 +139,7 @@ out:
> return ret;
>
> out_unregister:
> - for_each_online_cpu(cpu) {
> + for_each_possible_cpu(cpu) {
> device = &per_cpu(ux500_cpuidle_device, cpu);
> cpuidle_unregister_device(device);
> }
> --
> 1.7.9.5
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
--
with warm regards,
Chander Kashyap
^ permalink raw reply [flat|nested] 22+ messages in thread
* [V4 patch 03/15] cpuidle: make a single register function for all
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 01/15] cpuidle: remove en_core_tk_irqen flag Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 02/15] ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 12:19 ` Rob Herring
2013-04-23 12:32 ` Santosh Shilimkar
2013-04-23 8:54 ` [V4 patch 04/15] ARM: ux500: cpuidle: use init/exit common routine Daniel Lezcano
` (12 subsequent siblings)
15 siblings, 2 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
The usual scheme to initialize a cpuidle driver on a SMP is:
cpuidle_register_driver(drv);
for_each_possible_cpu(cpu) {
device = &per_cpu(cpuidle_dev, cpu);
cpuidle_register_device(device);
}
This code is duplicated in each cpuidle driver.
On UP systems, it is done this way:
cpuidle_register_driver(drv);
device = &per_cpu(cpuidle_dev, cpu);
cpuidle_register_device(device);
On UP, the macro 'for_each_cpu' does one iteration:
#define for_each_cpu(cpu, mask) \
for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
Hence, the initialization loop is the same for UP than SMP.
Beside, we saw different bugs / mis-initialization / return code unchecked in
the different drivers, the code is duplicated including bugs. After fixing all
these ones, it appears the initialization pattern is the same for everyone.
Please note, some drivers are doing dev->state_count = drv->state_count. This is
not necessary because it is done by the cpuidle_enable_device function in the
cpuidle framework. This is true, until you have the same states for all your
devices. Otherwise, the 'low level' API should be used instead with the specific
initialization for the driver.
Let's add a wrapper function doing this initialization with a cpumask parameter
for the coupled idle states and use it for all the drivers.
That will save a lot of LOC, consolidate the code, and the modifications in the
future could be done in a single place. Another benefit is the consolidation of
the cpuidle_device variable which is now in the cpuidle framework and no longer
spread accross the different arch specific drivers.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
Documentation/cpuidle/driver.txt | 6 ++++
drivers/cpuidle/cpuidle.c | 72 ++++++++++++++++++++++++++++++++++++++
include/linux/cpuidle.h | 9 +++--
3 files changed, 85 insertions(+), 2 deletions(-)
diff --git a/Documentation/cpuidle/driver.txt b/Documentation/cpuidle/driver.txt
index 7a9e09e..1b0d81d 100644
--- a/Documentation/cpuidle/driver.txt
+++ b/Documentation/cpuidle/driver.txt
@@ -15,11 +15,17 @@ has mechanisms in place to support actual entry-exit into CPU idle states.
cpuidle driver initializes the cpuidle_device structure for each CPU device
and registers with cpuidle using cpuidle_register_device.
+If all the idle states are the same, the wrapper function cpuidle_register
+could be used instead.
+
It can also support the dynamic changes (like battery <-> AC), by using
cpuidle_pause_and_lock, cpuidle_disable_device and cpuidle_enable_device,
cpuidle_resume_and_unlock.
Interfaces:
+extern int cpuidle_register(struct cpuidle_driver *drv,
+ const struct cpumask *const coupled_cpus);
+extern int cpuidle_unregister(struct cpuidle_driver *drv);
extern int cpuidle_register_driver(struct cpuidle_driver *drv);
extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
extern int cpuidle_register_device(struct cpuidle_device *dev);
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 0da795b..49e8d30 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -24,6 +24,7 @@
#include "cpuidle.h"
DEFINE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
+DEFINE_PER_CPU(struct cpuidle_device, cpuidle_dev);
DEFINE_MUTEX(cpuidle_lock);
LIST_HEAD(cpuidle_detected_devices);
@@ -453,6 +454,77 @@ void cpuidle_unregister_device(struct cpuidle_device *dev)
EXPORT_SYMBOL_GPL(cpuidle_unregister_device);
+/*
+ * cpuidle_unregister: unregister a driver and the devices. This function
+ * can be used only if the driver has been previously registered through
+ * the cpuidle_register function.
+ *
+ * @drv: a valid pointer to a struct cpuidle_driver
+ */
+void cpuidle_unregister(struct cpuidle_driver *drv)
+{
+ int cpu;
+ struct cpuidle_device *device;
+
+ for_each_possible_cpu(cpu) {
+ device = &per_cpu(cpuidle_dev, cpu);
+ cpuidle_unregister_device(device);
+ }
+
+ cpuidle_unregister_driver(drv);
+}
+EXPORT_SYMBOL_GPL(cpuidle_unregister);
+
+/**
+ * cpuidle_register: registers the driver and the cpu devices with the
+ * coupled_cpus passed as parameter. This function is used for all common
+ * initialization pattern there are in the arch specific drivers. The
+ * devices is globally defined in this file.
+ *
+ * @drv : a valid pointer to a struct cpuidle_driver
+ * @coupled_cpus: a cpumask for the coupled states
+ *
+ * Returns 0 on success, < 0 otherwise
+ */
+int cpuidle_register(struct cpuidle_driver *drv,
+ const struct cpumask *const coupled_cpus)
+{
+ int ret, cpu;
+ struct cpuidle_device *device;
+
+ ret = cpuidle_register_driver(drv);
+ if (ret) {
+ pr_err("failed to register cpuidle driver\n");
+ return ret;
+ }
+
+ for_each_possible_cpu(cpu) {
+ device = &per_cpu(cpuidle_dev, cpu);
+ device->cpu = cpu;
+
+#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
+ /*
+ * On multiplatform for ARM, the coupled idle states could
+ * enabled in the kernel even if the cpuidle driver does not
+ * use it. Note, coupled_cpus is a struct copy.
+ */
+ if (coupled_cpus)
+ device->coupled_cpus = *coupled_cpus;
+#endif
+ ret = cpuidle_register_device(device);
+ if (!ret)
+ continue;
+
+ pr_err("Failed to register cpuidle device for cpu%d\n", cpu);
+
+ cpuidle_unregister(drv);
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cpuidle_register);
+
#ifdef CONFIG_SMP
static void smp_callback(void *v)
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 79e3811..3c86faa 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -123,7 +123,9 @@ extern void cpuidle_driver_unref(void);
extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
extern int cpuidle_register_device(struct cpuidle_device *dev);
extern void cpuidle_unregister_device(struct cpuidle_device *dev);
-
+extern int cpuidle_register(struct cpuidle_driver *drv,
+ const struct cpumask *const coupled_cpus);
+extern void cpuidle_unregister(struct cpuidle_driver *drv);
extern void cpuidle_pause_and_lock(void);
extern void cpuidle_resume_and_unlock(void);
extern void cpuidle_pause(void);
@@ -148,7 +150,10 @@ static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
static inline int cpuidle_register_device(struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_unregister_device(struct cpuidle_device *dev) { }
-
+static inline int cpuidle_register(struct cpuidle_driver *drv,
+ const struct cpumask *const coupled_cpus)
+{return -ENODEV; }
+static inline void cpuidle_unregister(struct cpuidle_driver *drv) { }
static inline void cpuidle_pause_and_lock(void) { }
static inline void cpuidle_resume_and_unlock(void) { }
static inline void cpuidle_pause(void) { }
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [V4 patch 03/15] cpuidle: make a single register function for all
2013-04-23 8:54 ` [V4 patch 03/15] cpuidle: make a single register function for all Daniel Lezcano
@ 2013-04-23 12:19 ` Rob Herring
2013-04-23 12:32 ` Santosh Shilimkar
1 sibling, 0 replies; 22+ messages in thread
From: Rob Herring @ 2013-04-23 12:19 UTC (permalink / raw)
To: Daniel Lezcano
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, rjw, horms, linux, linux-arm-kernel, deepthi,
jkosina, linux-pm, lethal, kernel
On 04/23/2013 03:54 AM, Daniel Lezcano wrote:
> The usual scheme to initialize a cpuidle driver on a SMP is:
>
> cpuidle_register_driver(drv);
> for_each_possible_cpu(cpu) {
> device = &per_cpu(cpuidle_dev, cpu);
> cpuidle_register_device(device);
> }
>
> This code is duplicated in each cpuidle driver.
>
> On UP systems, it is done this way:
>
> cpuidle_register_driver(drv);
> device = &per_cpu(cpuidle_dev, cpu);
> cpuidle_register_device(device);
>
> On UP, the macro 'for_each_cpu' does one iteration:
>
> #define for_each_cpu(cpu, mask) \
> for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
>
> Hence, the initialization loop is the same for UP than SMP.
>
> Beside, we saw different bugs / mis-initialization / return code unchecked in
> the different drivers, the code is duplicated including bugs. After fixing all
> these ones, it appears the initialization pattern is the same for everyone.
>
> Please note, some drivers are doing dev->state_count = drv->state_count. This is
> not necessary because it is done by the cpuidle_enable_device function in the
> cpuidle framework. This is true, until you have the same states for all your
> devices. Otherwise, the 'low level' API should be used instead with the specific
> initialization for the driver.
>
> Let's add a wrapper function doing this initialization with a cpumask parameter
> for the coupled idle states and use it for all the drivers.
>
> That will save a lot of LOC, consolidate the code, and the modifications in the
> future could be done in a single place. Another benefit is the consolidation of
> the cpuidle_device variable which is now in the cpuidle framework and no longer
> spread accross the different arch specific drivers.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>
> ---
> Documentation/cpuidle/driver.txt | 6 ++++
> drivers/cpuidle/cpuidle.c | 72 ++++++++++++++++++++++++++++++++++++++
> include/linux/cpuidle.h | 9 +++--
> 3 files changed, 85 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/cpuidle/driver.txt b/Documentation/cpuidle/driver.txt
> index 7a9e09e..1b0d81d 100644
> --- a/Documentation/cpuidle/driver.txt
> +++ b/Documentation/cpuidle/driver.txt
> @@ -15,11 +15,17 @@ has mechanisms in place to support actual entry-exit into CPU idle states.
> cpuidle driver initializes the cpuidle_device structure for each CPU device
> and registers with cpuidle using cpuidle_register_device.
>
> +If all the idle states are the same, the wrapper function cpuidle_register
> +could be used instead.
> +
> It can also support the dynamic changes (like battery <-> AC), by using
> cpuidle_pause_and_lock, cpuidle_disable_device and cpuidle_enable_device,
> cpuidle_resume_and_unlock.
>
> Interfaces:
> +extern int cpuidle_register(struct cpuidle_driver *drv,
> + const struct cpumask *const coupled_cpus);
> +extern int cpuidle_unregister(struct cpuidle_driver *drv);
> extern int cpuidle_register_driver(struct cpuidle_driver *drv);
> extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
> extern int cpuidle_register_device(struct cpuidle_device *dev);
> diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
> index 0da795b..49e8d30 100644
> --- a/drivers/cpuidle/cpuidle.c
> +++ b/drivers/cpuidle/cpuidle.c
> @@ -24,6 +24,7 @@
> #include "cpuidle.h"
>
> DEFINE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
> +DEFINE_PER_CPU(struct cpuidle_device, cpuidle_dev);
>
> DEFINE_MUTEX(cpuidle_lock);
> LIST_HEAD(cpuidle_detected_devices);
> @@ -453,6 +454,77 @@ void cpuidle_unregister_device(struct cpuidle_device *dev)
>
> EXPORT_SYMBOL_GPL(cpuidle_unregister_device);
>
> +/*
> + * cpuidle_unregister: unregister a driver and the devices. This function
> + * can be used only if the driver has been previously registered through
> + * the cpuidle_register function.
> + *
> + * @drv: a valid pointer to a struct cpuidle_driver
> + */
> +void cpuidle_unregister(struct cpuidle_driver *drv)
> +{
> + int cpu;
> + struct cpuidle_device *device;
> +
> + for_each_possible_cpu(cpu) {
> + device = &per_cpu(cpuidle_dev, cpu);
> + cpuidle_unregister_device(device);
> + }
> +
> + cpuidle_unregister_driver(drv);
> +}
> +EXPORT_SYMBOL_GPL(cpuidle_unregister);
> +
> +/**
> + * cpuidle_register: registers the driver and the cpu devices with the
> + * coupled_cpus passed as parameter. This function is used for all common
> + * initialization pattern there are in the arch specific drivers. The
> + * devices is globally defined in this file.
> + *
> + * @drv : a valid pointer to a struct cpuidle_driver
> + * @coupled_cpus: a cpumask for the coupled states
> + *
> + * Returns 0 on success, < 0 otherwise
> + */
> +int cpuidle_register(struct cpuidle_driver *drv,
> + const struct cpumask *const coupled_cpus)
> +{
> + int ret, cpu;
> + struct cpuidle_device *device;
> +
> + ret = cpuidle_register_driver(drv);
> + if (ret) {
> + pr_err("failed to register cpuidle driver\n");
> + return ret;
> + }
> +
> + for_each_possible_cpu(cpu) {
> + device = &per_cpu(cpuidle_dev, cpu);
> + device->cpu = cpu;
> +
> +#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
> + /*
> + * On multiplatform for ARM, the coupled idle states could
> + * enabled in the kernel even if the cpuidle driver does not
> + * use it. Note, coupled_cpus is a struct copy.
> + */
> + if (coupled_cpus)
> + device->coupled_cpus = *coupled_cpus;
> +#endif
> + ret = cpuidle_register_device(device);
> + if (!ret)
> + continue;
> +
> + pr_err("Failed to register cpuidle device for cpu%d\n", cpu);
> +
> + cpuidle_unregister(drv);
> + break;
> + }
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(cpuidle_register);
> +
> #ifdef CONFIG_SMP
>
> static void smp_callback(void *v)
> diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
> index 79e3811..3c86faa 100644
> --- a/include/linux/cpuidle.h
> +++ b/include/linux/cpuidle.h
> @@ -123,7 +123,9 @@ extern void cpuidle_driver_unref(void);
> extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
> extern int cpuidle_register_device(struct cpuidle_device *dev);
> extern void cpuidle_unregister_device(struct cpuidle_device *dev);
> -
> +extern int cpuidle_register(struct cpuidle_driver *drv,
> + const struct cpumask *const coupled_cpus);
> +extern void cpuidle_unregister(struct cpuidle_driver *drv);
> extern void cpuidle_pause_and_lock(void);
> extern void cpuidle_resume_and_unlock(void);
> extern void cpuidle_pause(void);
> @@ -148,7 +150,10 @@ static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
> static inline int cpuidle_register_device(struct cpuidle_device *dev)
> {return -ENODEV; }
> static inline void cpuidle_unregister_device(struct cpuidle_device *dev) { }
> -
> +static inline int cpuidle_register(struct cpuidle_driver *drv,
> + const struct cpumask *const coupled_cpus)
> +{return -ENODEV; }
> +static inline void cpuidle_unregister(struct cpuidle_driver *drv) { }
> static inline void cpuidle_pause_and_lock(void) { }
> static inline void cpuidle_resume_and_unlock(void) { }
> static inline void cpuidle_pause(void) { }
>
^ permalink raw reply [flat|nested] 22+ messages in thread* Re: [V4 patch 03/15] cpuidle: make a single register function for all
2013-04-23 8:54 ` [V4 patch 03/15] cpuidle: make a single register function for all Daniel Lezcano
2013-04-23 12:19 ` Rob Herring
@ 2013-04-23 12:32 ` Santosh Shilimkar
2013-04-23 12:51 ` Daniel Lezcano
1 sibling, 1 reply; 22+ messages in thread
From: Santosh Shilimkar @ 2013-04-23 12:32 UTC (permalink / raw)
To: Daniel Lezcano
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, rjw, horms, linux, linux-arm-kernel, deepthi,
jkosina, linux-pm, lethal, kernel
On Tuesday 23 April 2013 02:24 PM, Daniel Lezcano wrote:
> The usual scheme to initialize a cpuidle driver on a SMP is:
>
> cpuidle_register_driver(drv);
> for_each_possible_cpu(cpu) {
> device = &per_cpu(cpuidle_dev, cpu);
> cpuidle_register_device(device);
> }
>
> This code is duplicated in each cpuidle driver.
>
> On UP systems, it is done this way:
>
> cpuidle_register_driver(drv);
> device = &per_cpu(cpuidle_dev, cpu);
> cpuidle_register_device(device);
>
> On UP, the macro 'for_each_cpu' does one iteration:
>
> #define for_each_cpu(cpu, mask) \
> for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
>
> Hence, the initialization loop is the same for UP than SMP.
>
> Beside, we saw different bugs / mis-initialization / return code unchecked in
> the different drivers, the code is duplicated including bugs. After fixing all
> these ones, it appears the initialization pattern is the same for everyone.
>
> Please note, some drivers are doing dev->state_count = drv->state_count. This is
> not necessary because it is done by the cpuidle_enable_device function in the
> cpuidle framework. This is true, until you have the same states for all your
> devices. Otherwise, the 'low level' API should be used instead with the specific
> initialization for the driver.
>
> Let's add a wrapper function doing this initialization with a cpumask parameter
> for the coupled idle states and use it for all the drivers.
>
> That will save a lot of LOC, consolidate the code, and the modifications in the
> future could be done in a single place. Another benefit is the consolidation of
> the cpuidle_device variable which is now in the cpuidle framework and no longer
> spread accross the different arch specific drivers.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> ---
I don't see you have addressed the comment on V3 [1] i gave for the subject patch
Any reason ?
Regards,
Santosh
[1] https://patchwork.kernel.org/patch/2435281/
^ permalink raw reply [flat|nested] 22+ messages in thread* Re: [V4 patch 03/15] cpuidle: make a single register function for all
2013-04-23 12:32 ` Santosh Shilimkar
@ 2013-04-23 12:51 ` Daniel Lezcano
2013-04-23 13:04 ` Santosh Shilimkar
0 siblings, 1 reply; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 12:51 UTC (permalink / raw)
To: Santosh Shilimkar
Cc: rjw, andrew, kgene.kim, jason, horms, patches, khilman,
magnus.damm, linux-pm, swarren, nsekhar, rob.herring, deepthi,
tony, lethal, linaro-kernel, kernel, josephl, jkosina, plagnioj,
linux, linux-arm-kernel
On 04/23/2013 02:32 PM, Santosh Shilimkar wrote:
> On Tuesday 23 April 2013 02:24 PM, Daniel Lezcano wrote:
>> The usual scheme to initialize a cpuidle driver on a SMP is:
>>
>> cpuidle_register_driver(drv);
>> for_each_possible_cpu(cpu) {
>> device = &per_cpu(cpuidle_dev, cpu);
>> cpuidle_register_device(device);
>> }
>>
>> This code is duplicated in each cpuidle driver.
>>
>> On UP systems, it is done this way:
>>
>> cpuidle_register_driver(drv);
>> device = &per_cpu(cpuidle_dev, cpu);
>> cpuidle_register_device(device);
>>
>> On UP, the macro 'for_each_cpu' does one iteration:
>>
>> #define for_each_cpu(cpu, mask) \
>> for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
>>
>> Hence, the initialization loop is the same for UP than SMP.
>>
>> Beside, we saw different bugs / mis-initialization / return code unchecked in
>> the different drivers, the code is duplicated including bugs. After fixing all
>> these ones, it appears the initialization pattern is the same for everyone.
>>
>> Please note, some drivers are doing dev->state_count = drv->state_count. This is
>> not necessary because it is done by the cpuidle_enable_device function in the
>> cpuidle framework. This is true, until you have the same states for all your
>> devices. Otherwise, the 'low level' API should be used instead with the specific
>> initialization for the driver.
>>
>> Let's add a wrapper function doing this initialization with a cpumask parameter
>> for the coupled idle states and use it for all the drivers.
>>
>> That will save a lot of LOC, consolidate the code, and the modifications in the
>> future could be done in a single place. Another benefit is the consolidation of
>> the cpuidle_device variable which is now in the cpuidle framework and no longer
>> spread accross the different arch specific drivers.
>>
>> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
>> ---
>
> I don't see you have addressed the comment on V3 [1] i gave for the subject patch
> Any reason ?
Yes, sorry for not answering.
This modification should be handled in the __cpuidle_register_device
function.
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 49e8d30..936d862 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -372,7 +372,7 @@ static int __cpuidle_register_device(struct
cpuidle_device *dev)
int ret;
struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
- if (!try_module_get(drv->owner))
+ if (!drv || !try_module_get(drv->owner))
return -EINVAL;
per_cpu(cpuidle_devices, dev->cpu) = dev;
Thus, the cpuidle_register function is not impacted by this as it will
always do cpuidle_register_driver, followed by cpuidle_register_device.
-- Daniel
--
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
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^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [V4 patch 03/15] cpuidle: make a single register function for all
2013-04-23 12:51 ` Daniel Lezcano
@ 2013-04-23 13:04 ` Santosh Shilimkar
0 siblings, 0 replies; 22+ messages in thread
From: Santosh Shilimkar @ 2013-04-23 13:04 UTC (permalink / raw)
To: Daniel Lezcano
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, rjw, horms, linux, linux-arm-kernel, deepthi,
jkosina, linux-pm, lethal, kernel
On Tuesday 23 April 2013 06:21 PM, Daniel Lezcano wrote:
> On 04/23/2013 02:32 PM, Santosh Shilimkar wrote:
>> On Tuesday 23 April 2013 02:24 PM, Daniel Lezcano wrote:
>>> The usual scheme to initialize a cpuidle driver on a SMP is:
>>>
>>> cpuidle_register_driver(drv);
>>> for_each_possible_cpu(cpu) {
>>> device = &per_cpu(cpuidle_dev, cpu);
>>> cpuidle_register_device(device);
>>> }
>>>
>>> This code is duplicated in each cpuidle driver.
>>>
>>> On UP systems, it is done this way:
>>>
>>> cpuidle_register_driver(drv);
>>> device = &per_cpu(cpuidle_dev, cpu);
>>> cpuidle_register_device(device);
>>>
>>> On UP, the macro 'for_each_cpu' does one iteration:
>>>
>>> #define for_each_cpu(cpu, mask) \
>>> for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
>>>
>>> Hence, the initialization loop is the same for UP than SMP.
>>>
>>> Beside, we saw different bugs / mis-initialization / return code unchecked in
>>> the different drivers, the code is duplicated including bugs. After fixing all
>>> these ones, it appears the initialization pattern is the same for everyone.
>>>
>>> Please note, some drivers are doing dev->state_count = drv->state_count. This is
>>> not necessary because it is done by the cpuidle_enable_device function in the
>>> cpuidle framework. This is true, until you have the same states for all your
>>> devices. Otherwise, the 'low level' API should be used instead with the specific
>>> initialization for the driver.
>>>
>>> Let's add a wrapper function doing this initialization with a cpumask parameter
>>> for the coupled idle states and use it for all the drivers.
>>>
>>> That will save a lot of LOC, consolidate the code, and the modifications in the
>>> future could be done in a single place. Another benefit is the consolidation of
>>> the cpuidle_device variable which is now in the cpuidle framework and no longer
>>> spread accross the different arch specific drivers.
>>>
>>> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
>>> ---
>>
>> I don't see you have addressed the comment on V3 [1] i gave for the subject patch
>> Any reason ?
>
> Yes, sorry for not answering.
>
> This modification should be handled in the __cpuidle_register_device
> function.
>
> diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
> index 49e8d30..936d862 100644
> --- a/drivers/cpuidle/cpuidle.c
> +++ b/drivers/cpuidle/cpuidle.c
> @@ -372,7 +372,7 @@ static int __cpuidle_register_device(struct
> cpuidle_device *dev)
> int ret;
> struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
>
> - if (!try_module_get(drv->owner))
> + if (!drv || !try_module_get(drv->owner))
> return -EINVAL;
>
> per_cpu(cpuidle_devices, dev->cpu) = dev;
>
> Thus, the cpuidle_register function is not impacted by this as it will
> always do cpuidle_register_driver, followed by cpuidle_register_device.
>
I still don't follow you. I know the fix will be needed but in the subject
patch sequence as well, the device registration should be done first and
then the driver registration. Below hunk I mean.
----
+int cpuidle_register(struct cpuidle_driver *drv,
+ const struct cpumask *const coupled_cpus)
+{
+ int ret, cpu;
+ struct cpuidle_device *device;
+
+ ret = cpuidle_register_driver(drv);
+ if (ret) {
+ pr_err("failed to register cpuidle driver\n");
+ return ret;
+ }
+
+ for_each_possible_cpu(cpu) {
+ device = &per_cpu(cpuidle_dev, cpu);
+ device->cpu = cpu;
+
+#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
+ /*
+ * On multiplatform for ARM, the coupled idle states could
+ * enabled in the kernel even if the cpuidle driver does not
+ * use it. Note, coupled_cpus is a struct copy.
+ */
+ if (coupled_cpus)
+ device->coupled_cpus = *coupled_cpus;
+#endif
+ ret = cpuidle_register_device(device);
+ if (!ret)
+ continue;
+
+ pr_err("Failed to register cpuidle device for cpu%d\n", cpu);
+
+ cpuidle_unregister(drv);
+ break;
+ }
------
I also had a comment on kernel doc for both of these new functions.
Out of curiosity I have seen this patch again o.w I would have assumed
that you did address the comments.
Regards,
Santosh
^ permalink raw reply [flat|nested] 22+ messages in thread
* [V4 patch 04/15] ARM: ux500: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (2 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 03/15] cpuidle: make a single register function for all Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 05/15] ARM: at91: " Daniel Lezcano
` (11 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicate code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
arch/arm/mach-ux500/cpuidle.c | 32 +-------------------------------
1 file changed, 1 insertion(+), 31 deletions(-)
diff --git a/arch/arm/mach-ux500/cpuidle.c b/arch/arm/mach-ux500/cpuidle.c
index 5657d4a..488e074 100644
--- a/arch/arm/mach-ux500/cpuidle.c
+++ b/arch/arm/mach-ux500/cpuidle.c
@@ -21,7 +21,6 @@
static atomic_t master = ATOMIC_INIT(0);
static DEFINE_SPINLOCK(master_lock);
-static DEFINE_PER_CPU(struct cpuidle_device, ux500_cpuidle_device);
static inline int ux500_enter_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
@@ -112,40 +111,11 @@ static struct cpuidle_driver ux500_idle_driver = {
int __init ux500_idle_init(void)
{
- int ret, cpu;
- struct cpuidle_device *device;
-
/* Configure wake up reasons */
prcmu_enable_wakeups(PRCMU_WAKEUP(ARM) | PRCMU_WAKEUP(RTC) |
PRCMU_WAKEUP(ABB));
- ret = cpuidle_register_driver(&ux500_idle_driver);
- if (ret) {
- printk(KERN_ERR "failed to register ux500 idle driver\n");
- return ret;
- }
-
- for_each_possible(cpu) {
- device = &per_cpu(ux500_cpuidle_device, cpu);
- device->cpu = cpu;
- ret = cpuidle_register_device(device);
- if (ret) {
- printk(KERN_ERR "Failed to register cpuidle "
- "device for cpu%d\n", cpu);
- goto out_unregister;
- }
- }
-out:
- return ret;
-
-out_unregister:
- for_each_possible_cpu(cpu) {
- device = &per_cpu(ux500_cpuidle_device, cpu);
- cpuidle_unregister_device(device);
- }
-
- cpuidle_unregister_driver(&ux500_idle_driver);
- goto out;
+ return cpuidle_register(&ux500_idle_driver, NULL);
}
device_initcall(ux500_idle_init);
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 05/15] ARM: at91: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (3 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 04/15] ARM: ux500: cpuidle: use init/exit common routine Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 06/15] ARM: OMAP3: " Daniel Lezcano
` (10 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
---
arch/arm/mach-at91/cpuidle.c | 17 ++---------------
1 file changed, 2 insertions(+), 15 deletions(-)
diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
index 0130df7..48f1228 100644
--- a/arch/arm/mach-at91/cpuidle.c
+++ b/arch/arm/mach-at91/cpuidle.c
@@ -27,8 +27,6 @@
#define AT91_MAX_STATES 2
-static DEFINE_PER_CPU(struct cpuidle_device, at91_cpuidle_device);
-
/* Actual code that puts the SoC in different idle states */
static int at91_enter_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
@@ -60,20 +58,9 @@ static struct cpuidle_driver at91_idle_driver = {
};
/* Initialize CPU idle by registering the idle states */
-static int at91_init_cpuidle(void)
+static int __init at91_init_cpuidle(void)
{
- struct cpuidle_device *device;
-
- device = &per_cpu(at91_cpuidle_device, smp_processor_id());
- device->state_count = AT91_MAX_STATES;
-
- cpuidle_register_driver(&at91_idle_driver);
-
- if (cpuidle_register_device(device)) {
- printk(KERN_ERR "at91_init_cpuidle: Failed registering\n");
- return -EIO;
- }
- return 0;
+ return cpuidle_register(&at91_idle_driver, NULL);
}
device_initcall(at91_init_cpuidle);
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 06/15] ARM: OMAP3: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (4 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 05/15] ARM: at91: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 07/15] ARM: tegra: " Daniel Lezcano
` (9 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
---
arch/arm/mach-omap2/cpuidle34xx.c | 22 ++--------------------
1 file changed, 2 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 20785b2..cca045c 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -26,6 +26,7 @@
#include <linux/cpuidle.h>
#include <linux/export.h>
#include <linux/cpu_pm.h>
+#include <asm/cpuidle.h>
#include "powerdomain.h"
#include "clockdomain.h"
@@ -259,8 +260,6 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
return ret;
}
-static DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
-
static struct cpuidle_driver omap3_idle_driver = {
.name = "omap3_idle",
.owner = THIS_MODULE,
@@ -336,8 +335,6 @@ static struct cpuidle_driver omap3_idle_driver = {
*/
int __init omap3_idle_init(void)
{
- struct cpuidle_device *dev;
-
mpu_pd = pwrdm_lookup("mpu_pwrdm");
core_pd = pwrdm_lookup("core_pwrdm");
per_pd = pwrdm_lookup("per_pwrdm");
@@ -346,20 +343,5 @@ int __init omap3_idle_init(void)
if (!mpu_pd || !core_pd || !per_pd || !cam_pd)
return -ENODEV;
- if (cpuidle_register_driver(&omap3_idle_driver)) {
- pr_err("%s: CPUidle driver register failed\n", __func__);
- return -EIO;
- }
-
- dev = &per_cpu(omap3_idle_dev, smp_processor_id());
- dev->cpu = 0;
-
- if (cpuidle_register_device(dev)) {
- printk(KERN_ERR "%s: CPUidle register device failed\n",
- __func__);
- cpuidle_unregister_driver(&omap3_idle_driver);
- return -EIO;
- }
-
- return 0;
+ return cpuidle_register(&omap3_idle_driver, NULL);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 07/15] ARM: tegra: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (5 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 06/15] ARM: OMAP3: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 08/15] ARM: shmobile: " Daniel Lezcano
` (8 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
arch/arm/mach-tegra/cpuidle-tegra114.c | 26 +-------------------------
1 file changed, 1 insertion(+), 25 deletions(-)
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c
index c5fadf9..1d1c602 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra114.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra114.c
@@ -29,31 +29,7 @@ static struct cpuidle_driver tegra_idle_driver = {
},
};
-static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
-
int __init tegra114_cpuidle_init(void)
{
- int ret;
- unsigned int cpu;
- struct cpuidle_device *dev;
- struct cpuidle_driver *drv = &tegra_idle_driver;
-
- ret = cpuidle_register_driver(&tegra_idle_driver);
- if (ret) {
- pr_err("CPUidle driver registration failed\n");
- return ret;
- }
-
- for_each_possible_cpu(cpu) {
- dev = &per_cpu(tegra_idle_device, cpu);
- dev->cpu = cpu;
-
- ret = cpuidle_register_device(dev);
- if (ret) {
- pr_err("CPU%u: CPUidle device registration failed\n",
- cpu);
- return ret;
- }
- }
- return 0;
+ return cpuidle_register(&tegra_idle_driver, NULL);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 08/15] ARM: shmobile: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (6 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 07/15] ARM: tegra: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 09/15] ARM: OMAP4: " Daniel Lezcano
` (7 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
---
arch/arm/mach-shmobile/cpuidle.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/arch/arm/mach-shmobile/cpuidle.c b/arch/arm/mach-shmobile/cpuidle.c
index d671ae9..0afeb5c 100644
--- a/arch/arm/mach-shmobile/cpuidle.c
+++ b/arch/arm/mach-shmobile/cpuidle.c
@@ -16,7 +16,6 @@
#include <asm/cpuidle.h>
#include <asm/io.h>
-static struct cpuidle_device shmobile_cpuidle_dev;
static struct cpuidle_driver shmobile_cpuidle_default_driver = {
.name = "shmobile_cpuidle",
.owner = THIS_MODULE,
@@ -34,12 +33,5 @@ void __init shmobile_cpuidle_set_driver(struct cpuidle_driver *drv)
int __init shmobile_cpuidle_init(void)
{
- struct cpuidle_device *dev = &shmobile_cpuidle_dev;
-
- cpuidle_register_driver(cpuidle_drv);
-
- dev->state_count = cpuidle_drv->state_count;
- cpuidle_register_device(dev);
-
- return 0;
+ return cpuidle_register(cpuidle_drv, NULL);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 09/15] ARM: OMAP4: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (7 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 08/15] ARM: shmobile: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 10/15] ARM: tegra: cpuidle: use init/exit common routine for tegra2 Daniel Lezcano
` (6 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
---
arch/arm/mach-omap2/cpuidle44xx.c | 26 ++------------------------
1 file changed, 2 insertions(+), 24 deletions(-)
diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
index d1bfb21..5a286b5 100644
--- a/arch/arm/mach-omap2/cpuidle44xx.c
+++ b/arch/arm/mach-omap2/cpuidle44xx.c
@@ -15,6 +15,7 @@
#include <linux/cpu_pm.h>
#include <linux/export.h>
+#include <asm/cpuidle.h>
#include <asm/proc-fns.h>
#include "common.h"
@@ -159,8 +160,6 @@ fail:
return index;
}
-static DEFINE_PER_CPU(struct cpuidle_device, omap_idle_dev);
-
static struct cpuidle_driver omap4_idle_driver = {
.name = "omap4_idle",
.owner = THIS_MODULE,
@@ -209,9 +208,6 @@ static struct cpuidle_driver omap4_idle_driver = {
*/
int __init omap4_idle_init(void)
{
- struct cpuidle_device *dev;
- unsigned int cpu_id = 0;
-
mpu_pd = pwrdm_lookup("mpu_pwrdm");
cpu_pd[0] = pwrdm_lookup("cpu0_pwrdm");
cpu_pd[1] = pwrdm_lookup("cpu1_pwrdm");
@@ -223,23 +219,5 @@ int __init omap4_idle_init(void)
if (!cpu_clkdm[0] || !cpu_clkdm[1])
return -ENODEV;
- if (cpuidle_register_driver(&omap4_idle_driver)) {
- pr_err("%s: CPUidle driver register failed\n", __func__);
- return -EIO;
- }
-
- for_each_cpu(cpu_id, cpu_online_mask) {
- dev = &per_cpu(omap_idle_dev, cpu_id);
- dev->cpu = cpu_id;
-#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
- dev->coupled_cpus = *cpu_online_mask;
-#endif
- if (cpuidle_register_device(dev)) {
- pr_err("%s: CPUidle register failed\n", __func__);
- cpuidle_unregister_driver(&omap4_idle_driver);
- return -EIO;
- }
- }
-
- return 0;
+ return cpuidle_register(&omap4_idle_driver, cpu_online_mask);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 10/15] ARM: tegra: cpuidle: use init/exit common routine for tegra2
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (8 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 09/15] ARM: OMAP4: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 11/15] ARM: tegra: cpuidle: use init/exit common routine for tegra3 Daniel Lezcano
` (5 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
arch/arm/mach-tegra/cpuidle-tegra20.c | 30 +-----------------------------
1 file changed, 1 insertion(+), 29 deletions(-)
diff --git a/arch/arm/mach-tegra/cpuidle-tegra20.c b/arch/arm/mach-tegra/cpuidle-tegra20.c
index f1f6ac4..590ec25 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra20.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra20.c
@@ -70,8 +70,6 @@ static struct cpuidle_driver tegra_idle_driver = {
.safe_state_index = 0,
};
-static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
-
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_SMP
static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
@@ -220,34 +218,8 @@ static int tegra20_idle_lp2_coupled(struct cpuidle_device *dev,
int __init tegra20_cpuidle_init(void)
{
- int ret;
- unsigned int cpu;
- struct cpuidle_device *dev;
- struct cpuidle_driver *drv = &tegra_idle_driver;
-
#ifdef CONFIG_PM_SLEEP
tegra_tear_down_cpu = tegra20_tear_down_cpu;
#endif
-
- ret = cpuidle_register_driver(&tegra_idle_driver);
- if (ret) {
- pr_err("CPUidle driver registration failed\n");
- return ret;
- }
-
- for_each_possible_cpu(cpu) {
- dev = &per_cpu(tegra_idle_device, cpu);
- dev->cpu = cpu;
-#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
- dev->coupled_cpus = *cpu_possible_mask;
-#endif
-
- ret = cpuidle_register_device(dev);
- if (ret) {
- pr_err("CPU%u: CPUidle device registration failed\n",
- cpu);
- return ret;
- }
- }
- return 0;
+ return cpuidle_register(&tegra_idle_driver, cpu_possible_mask);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 11/15] ARM: tegra: cpuidle: use init/exit common routine for tegra3
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (9 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 10/15] ARM: tegra: cpuidle: use init/exit common routine for tegra2 Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 12/15] ARM: calxeda: cpuidle: use init/exit common routine Daniel Lezcano
` (4 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
arch/arm/mach-tegra/cpuidle-tegra30.c | 27 +--------------------------
1 file changed, 1 insertion(+), 26 deletions(-)
diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c
index f6a0c72..36dc2be 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra30.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra30.c
@@ -64,8 +64,6 @@ static struct cpuidle_driver tegra_idle_driver = {
},
};
-static DEFINE_PER_CPU(struct cpuidle_device, tegra_idle_device);
-
#ifdef CONFIG_PM_SLEEP
static bool tegra30_cpu_cluster_power_down(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
@@ -156,31 +154,8 @@ static int tegra30_idle_lp2(struct cpuidle_device *dev,
int __init tegra30_cpuidle_init(void)
{
- int ret;
- unsigned int cpu;
- struct cpuidle_device *dev;
- struct cpuidle_driver *drv = &tegra_idle_driver;
-
#ifdef CONFIG_PM_SLEEP
tegra_tear_down_cpu = tegra30_tear_down_cpu;
#endif
-
- ret = cpuidle_register_driver(&tegra_idle_driver);
- if (ret) {
- pr_err("CPUidle driver registration failed\n");
- return ret;
- }
-
- for_each_possible_cpu(cpu) {
- dev = &per_cpu(tegra_idle_device, cpu);
- dev->cpu = cpu;
-
- ret = cpuidle_register_device(dev);
- if (ret) {
- pr_err("CPU%u: CPUidle device registration failed\n",
- cpu);
- return ret;
- }
- }
- return 0;
+ return cpuidle_register(&tegra_idle_driver, NULL);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 12/15] ARM: calxeda: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (10 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 11/15] ARM: tegra: cpuidle: use init/exit common routine for tegra3 Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 13/15] ARM: kirkwood: " Daniel Lezcano
` (3 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
---
drivers/cpuidle/cpuidle-calxeda.c | 52 +------------------------------------
1 file changed, 1 insertion(+), 51 deletions(-)
diff --git a/drivers/cpuidle/cpuidle-calxeda.c b/drivers/cpuidle/cpuidle-calxeda.c
index a3b56f5..e344b56 100644
--- a/drivers/cpuidle/cpuidle-calxeda.c
+++ b/drivers/cpuidle/cpuidle-calxeda.c
@@ -35,8 +35,6 @@
extern void highbank_set_cpu_jump(int cpu, void *jump_addr);
extern void *scu_base_addr;
-static struct cpuidle_device __percpu *calxeda_idle_cpuidle_devices;
-
static inline unsigned int get_auxcr(void)
{
unsigned int val;
@@ -85,19 +83,6 @@ static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
return index;
}
-static void calxeda_idle_cpuidle_devices_uninit(void)
-{
- int i;
- struct cpuidle_device *dev;
-
- for_each_possible_cpu(i) {
- dev = per_cpu_ptr(calxeda_idle_cpuidle_devices, i);
- cpuidle_unregister_device(dev);
- }
-
- free_percpu(calxeda_idle_cpuidle_devices);
-}
-
static struct cpuidle_driver calxeda_idle_driver = {
.name = "calxeda_idle",
.states = {
@@ -117,44 +102,9 @@ static struct cpuidle_driver calxeda_idle_driver = {
static int __init calxeda_cpuidle_init(void)
{
- int cpu_id;
- int ret;
- struct cpuidle_device *dev;
- struct cpuidle_driver *drv = &calxeda_idle_driver;
-
if (!of_machine_is_compatible("calxeda,highbank"))
return -ENODEV;
- ret = cpuidle_register_driver(drv);
- if (ret)
- return ret;
-
- calxeda_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device);
- if (calxeda_idle_cpuidle_devices == NULL) {
- ret = -ENOMEM;
- goto unregister_drv;
- }
-
- /* initialize state data for each cpuidle_device */
- for_each_possible_cpu(cpu_id) {
- dev = per_cpu_ptr(calxeda_idle_cpuidle_devices, cpu_id);
- dev->cpu = cpu_id;
- dev->state_count = drv->state_count;
-
- ret = cpuidle_register_device(dev);
- if (ret) {
- pr_err("Failed to register cpu %u, error: %d\n",
- cpu_id, ret);
- goto uninit;
- }
- }
-
- return 0;
-
-uninit:
- calxeda_idle_cpuidle_devices_uninit();
-unregister_drv:
- cpuidle_unregister_driver(drv);
- return ret;
+ return cpuidle_register(&calxeda_idle_driver, NULL);
}
module_init(calxeda_cpuidle_init);
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 13/15] ARM: kirkwood: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (11 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 12/15] ARM: calxeda: cpuidle: use init/exit common routine Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 14/15] ARM: davinci: " Daniel Lezcano
` (2 subsequent siblings)
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Andrew Lunn <andrew@lunn.ch>
---
drivers/cpuidle/cpuidle-kirkwood.c | 17 ++---------------
1 file changed, 2 insertions(+), 15 deletions(-)
diff --git a/drivers/cpuidle/cpuidle-kirkwood.c b/drivers/cpuidle/cpuidle-kirkwood.c
index 6f31524..53290e1 100644
--- a/drivers/cpuidle/cpuidle-kirkwood.c
+++ b/drivers/cpuidle/cpuidle-kirkwood.c
@@ -52,9 +52,6 @@ static struct cpuidle_driver kirkwood_idle_driver = {
},
.state_count = KIRKWOOD_MAX_STATES,
};
-static struct cpuidle_device *device;
-
-static DEFINE_PER_CPU(struct cpuidle_device, kirkwood_cpuidle_device);
/* Initialize CPU idle by registering the idle states */
static int kirkwood_cpuidle_probe(struct platform_device *pdev)
@@ -69,22 +66,12 @@ static int kirkwood_cpuidle_probe(struct platform_device *pdev)
if (IS_ERR(ddr_operation_base))
return PTR_ERR(ddr_operation_base);
- device = &per_cpu(kirkwood_cpuidle_device, smp_processor_id());
- device->state_count = KIRKWOOD_MAX_STATES;
-
- cpuidle_register_driver(&kirkwood_idle_driver);
- if (cpuidle_register_device(device)) {
- pr_err("kirkwood_init_cpuidle: Failed registering\n");
- return -EIO;
- }
- return 0;
+ return cpuidle_register(&kirkwood_idle_driver, NULL);
}
int kirkwood_cpuidle_remove(struct platform_device *pdev)
{
- cpuidle_unregister_device(device);
- cpuidle_unregister_driver(&kirkwood_idle_driver);
-
+ cpuidle_unregister(&kirkwood_idle_driver);
return 0;
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 14/15] ARM: davinci: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (12 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 13/15] ARM: kirkwood: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 8:54 ` [V4 patch 15/15] ARM: imx: " Daniel Lezcano
2013-04-23 12:00 ` [V4 patch 00/15] cpuidle: code consolidation Rafael J. Wysocki
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
Remove the duplicated code and use the cpuidle common code for initialization.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Sekhar Nori <nsekhar@ti.com>
---
arch/arm/mach-davinci/cpuidle.c | 20 +-------------------
1 file changed, 1 insertion(+), 19 deletions(-)
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
index c2887c5..36aef3a 100644
--- a/arch/arm/mach-davinci/cpuidle.c
+++ b/arch/arm/mach-davinci/cpuidle.c
@@ -25,7 +25,6 @@
#define DAVINCI_CPUIDLE_MAX_STATES 2
-static DEFINE_PER_CPU(struct cpuidle_device, davinci_cpuidle_device);
static void __iomem *ddr2_reg_base;
static bool ddr2_pdown;
@@ -76,12 +75,8 @@ static struct cpuidle_driver davinci_idle_driver = {
static int __init davinci_cpuidle_probe(struct platform_device *pdev)
{
- int ret;
- struct cpuidle_device *device;
struct davinci_cpuidle_config *pdata = pdev->dev.platform_data;
- device = &per_cpu(davinci_cpuidle_device, smp_processor_id());
-
if (!pdata) {
dev_err(&pdev->dev, "cannot get platform data\n");
return -ENOENT;
@@ -91,20 +86,7 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev)
ddr2_pdown = pdata->ddr2_pdown;
- ret = cpuidle_register_driver(&davinci_idle_driver);
- if (ret) {
- dev_err(&pdev->dev, "failed to register driver\n");
- return ret;
- }
-
- ret = cpuidle_register_device(device);
- if (ret) {
- dev_err(&pdev->dev, "failed to register device\n");
- cpuidle_unregister_driver(&davinci_idle_driver);
- return ret;
- }
-
- return 0;
+ return cpuidle_register(&davinci_idle_driver, NULL);
}
static struct platform_driver davinci_cpuidle_driver = {
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* [V4 patch 15/15] ARM: imx: cpuidle: use init/exit common routine
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (13 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 14/15] ARM: davinci: " Daniel Lezcano
@ 2013-04-23 8:54 ` Daniel Lezcano
2013-04-23 12:00 ` [V4 patch 00/15] cpuidle: code consolidation Rafael J. Wysocki
15 siblings, 0 replies; 22+ messages in thread
From: Daniel Lezcano @ 2013-04-23 8:54 UTC (permalink / raw)
To: rjw
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
The code intializes the cpuidle driver at different places.
The cpuidle driver for :
* imx5 : is in the pm-imx5.c, the init function is in cpuidle.c
* imx6 : is in cpuidle-imx6q.c, the init function is in cpuidle.c
and cpuidle-imx6q.c
Instead of having the cpuidle code spread across different files,
let's create a driver for each SoC and use the common register function.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
---
arch/arm/mach-imx/Makefile | 2 +-
arch/arm/mach-imx/cpuidle-imx5.c | 37 +++++++++++++++++
arch/arm/mach-imx/cpuidle-imx6q.c | 2 +-
arch/arm/mach-imx/cpuidle.c | 80 -------------------------------------
arch/arm/mach-imx/cpuidle.h | 10 ++---
arch/arm/mach-imx/pm-imx5.c | 29 +-------------
6 files changed, 44 insertions(+), 116 deletions(-)
create mode 100644 arch/arm/mach-imx/cpuidle-imx5.c
delete mode 100644 arch/arm/mach-imx/cpuidle.c
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index c4ce090..cb70961 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -30,7 +30,7 @@ obj-$(CONFIG_MXC_DEBUG_BOARD) += 3ds_debugboard.o
obj-$(CONFIG_CPU_FREQ_IMX) += cpufreq.o
ifeq ($(CONFIG_CPU_IDLE),y)
-obj-y += cpuidle.o
+obj-$(CONFIG_SOC_IMX5) += cpuidle-imx5.o
obj-$(CONFIG_SOC_IMX6Q) += cpuidle-imx6q.o
endif
diff --git a/arch/arm/mach-imx/cpuidle-imx5.c b/arch/arm/mach-imx/cpuidle-imx5.c
new file mode 100644
index 0000000..5a47e3c
--- /dev/null
+++ b/arch/arm/mach-imx/cpuidle-imx5.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/cpuidle.h>
+#include <linux/module.h>
+#include <asm/system_misc.h>
+
+static int imx5_cpuidle_enter(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ arm_pm_idle();
+ return index;
+}
+
+static struct cpuidle_driver imx5_cpuidle_driver = {
+ .name = "imx5_cpuidle",
+ .owner = THIS_MODULE,
+ .states[0] = {
+ .enter = imx5_cpuidle_enter,
+ .exit_latency = 2,
+ .target_residency = 1,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "IMX5 SRPG",
+ .desc = "CPU state retained,powered off",
+ },
+ .state_count = 1,
+};
+
+int __init imx5_cpuidle_init(void)
+{
+ return cpuidle_register(&imx5_cpuidle_driver, NULL);
+}
diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c
index e2739ad..23ddfb6 100644
--- a/arch/arm/mach-imx/cpuidle-imx6q.c
+++ b/arch/arm/mach-imx/cpuidle-imx6q.c
@@ -71,5 +71,5 @@ int __init imx6q_cpuidle_init(void)
/* Set chicken bit to get a reliable WAIT mode support */
imx6q_set_chicken_bit();
- return imx_cpuidle_init(&imx6q_cpuidle_driver);
+ return cpuidle_register(&imx6q_cpuidle_driver, NULL);
}
diff --git a/arch/arm/mach-imx/cpuidle.c b/arch/arm/mach-imx/cpuidle.c
deleted file mode 100644
index d4cb511..0000000
--- a/arch/arm/mach-imx/cpuidle.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright 2012 Freescale Semiconductor, Inc.
- * Copyright 2012 Linaro Ltd.
- *
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
- */
-
-#include <linux/cpuidle.h>
-#include <linux/err.h>
-#include <linux/hrtimer.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-static struct cpuidle_device __percpu * imx_cpuidle_devices;
-
-static void __init imx_cpuidle_devices_uninit(void)
-{
- int cpu_id;
- struct cpuidle_device *dev;
-
- for_each_possible_cpu(cpu_id) {
- dev = per_cpu_ptr(imx_cpuidle_devices, cpu_id);
- cpuidle_unregister_device(dev);
- }
-
- free_percpu(imx_cpuidle_devices);
-}
-
-int __init imx_cpuidle_init(struct cpuidle_driver *drv)
-{
- struct cpuidle_device *dev;
- int cpu_id, ret;
-
- if (drv->state_count > CPUIDLE_STATE_MAX) {
- pr_err("%s: state_count exceeds maximum\n", __func__);
- return -EINVAL;
- }
-
- ret = cpuidle_register_driver(drv);
- if (ret) {
- pr_err("%s: Failed to register cpuidle driver with error: %d\n",
- __func__, ret);
- return ret;
- }
-
- imx_cpuidle_devices = alloc_percpu(struct cpuidle_device);
- if (imx_cpuidle_devices == NULL) {
- ret = -ENOMEM;
- goto unregister_drv;
- }
-
- /* initialize state data for each cpuidle_device */
- for_each_possible_cpu(cpu_id) {
- dev = per_cpu_ptr(imx_cpuidle_devices, cpu_id);
- dev->cpu = cpu_id;
- dev->state_count = drv->state_count;
-
- ret = cpuidle_register_device(dev);
- if (ret) {
- pr_err("%s: Failed to register cpu %u, error: %d\n",
- __func__, cpu_id, ret);
- goto uninit;
- }
- }
-
- return 0;
-
-uninit:
- imx_cpuidle_devices_uninit();
-
-unregister_drv:
- cpuidle_unregister_driver(drv);
- return ret;
-}
diff --git a/arch/arm/mach-imx/cpuidle.h b/arch/arm/mach-imx/cpuidle.h
index e092d13..786f98e 100644
--- a/arch/arm/mach-imx/cpuidle.h
+++ b/arch/arm/mach-imx/cpuidle.h
@@ -10,18 +10,16 @@
* http://www.gnu.org/copyleft/gpl.html
*/
-#include <linux/cpuidle.h>
-
#ifdef CONFIG_CPU_IDLE
-extern int imx_cpuidle_init(struct cpuidle_driver *drv);
+extern int imx5_cpuidle_init(void);
extern int imx6q_cpuidle_init(void);
#else
-static inline int imx_cpuidle_init(struct cpuidle_driver *drv)
+static inline int imx5_cpuidle_init(void)
{
- return -ENODEV;
+ return 0;
}
static inline int imx6q_cpuidle_init(void)
{
- return -ENODEV;
+ return 0;
}
#endif
diff --git a/arch/arm/mach-imx/pm-imx5.c b/arch/arm/mach-imx/pm-imx5.c
index 4b52b3e..82e79c6 100644
--- a/arch/arm/mach-imx/pm-imx5.c
+++ b/arch/arm/mach-imx/pm-imx5.c
@@ -149,32 +149,6 @@ static void imx5_pm_idle(void)
imx5_cpu_do_idle();
}
-static int imx5_cpuidle_enter(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int idx)
-{
- int ret;
-
- ret = imx5_cpu_do_idle();
- if (ret < 0)
- return ret;
-
- return idx;
-}
-
-static struct cpuidle_driver imx5_cpuidle_driver = {
- .name = "imx5_cpuidle",
- .owner = THIS_MODULE,
- .states[0] = {
- .enter = imx5_cpuidle_enter,
- .exit_latency = 2,
- .target_residency = 1,
- .flags = CPUIDLE_FLAG_TIME_VALID,
- .name = "IMX5 SRPG",
- .desc = "CPU state retained,powered off",
- },
- .state_count = 1,
-};
-
static int __init imx5_pm_common_init(void)
{
int ret;
@@ -192,8 +166,7 @@ static int __init imx5_pm_common_init(void)
/* Set the registers to the default cpu idle state. */
mx5_cpu_lp_set(IMX5_DEFAULT_CPU_IDLE_STATE);
- imx_cpuidle_init(&imx5_cpuidle_driver);
- return 0;
+ return imx5_cpuidle_init();
}
void __init imx51_pm_init(void)
--
1.7.9.5
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [V4 patch 00/15] cpuidle: code consolidation
2013-04-23 8:54 [V4 patch 00/15] cpuidle: code consolidation Daniel Lezcano
` (14 preceding siblings ...)
2013-04-23 8:54 ` [V4 patch 15/15] ARM: imx: " Daniel Lezcano
@ 2013-04-23 12:00 ` Rafael J. Wysocki
15 siblings, 0 replies; 22+ messages in thread
From: Rafael J. Wysocki @ 2013-04-23 12:00 UTC (permalink / raw)
To: Daniel Lezcano
Cc: andrew, khilman, nsekhar, josephl, kgene.kim, patches,
magnus.damm, tony, plagnioj, linaro-kernel, jason, swarren,
rob.herring, horms, linux, linux-arm-kernel, deepthi, jkosina,
linux-pm, lethal, kernel
On Tuesday, April 23, 2013 10:54:30 AM Daniel Lezcano wrote:
> This patchset series provide some code consolidation across the different
> cpuidle drivers. It contains two parts, the first one is the removal of
> the time keeping flag and the second one, is a common initialization routine.
>
> All the drivers use the en_core_tk_irqen flag, which means it is not necessary
> to make the time computation optional. We can remove this flag and assume the
> cpuidle framework always manage this operation.
>
> The cpuidle code initialization is duplicated across the different drivers in
> the same manner.
>
> The repeating pattern is:
>
> SMP:
>
> cpuidle_register_driver(drv);
> for_each_possible_cpu(cpu) {
> dev = per_cpu(cpuidle_device, cpu);
> cpuidle_register_device(dev);
> }
>
> UP:
>
> cpuidle_register_driver(drv);
> cpuidle_register_device(dev);
>
> As on a UP machine the macro 'for_each_cpu' is a one iteration loop, using the
> initialization loop from SMP to UP works.
>
> The patchset does some cleanup for different drivers in order to make the init
> code the same. Then it introduces a generic function:
>
> cpuidle_register(struct cpuidle_driver *drv, struct cpumask *cpumask)
>
> The cpumask is for the coupled idle states.
>
> The drivers are then modified to take into account this new function and
> to remove the duplicated code.
>
> The benefit is observable in the diffstat: 332 lines of code removed.
>
> Changelog:
> - V4:
> * Added the different Acked-by and Reviewed-by
> * Removed the patches already merged:
> * ARM: shmobile: cpuidle: remove shmobile_enter_wfi function
> * ARM: shmobile: cpuidle: remove shmobile_enter_wfi prototype
> * ARM: OMAP3: remove cpuidle_wrap_enter
> * Removed patch without acked-by (no answer from the maintainer)
> * ARM: s3c64xx: cpuidle: use init/exit common routine
>
> - V3:
> * folded patch 5/19 into 19/19, they were:
> * ARM: imx: cpuidle: use init/exit common routine
> * ARM: imx: cpuidle: create separate drivers for imx5/imx6
> * removed rule to make cpuidle.o in the imx's Makefile
> * splitted patch 1/19 into two, they are:
> * [V3 patch 01/19] ARM: shmobile: cpuidle: remove shmobile_enter_wfi
> * [V3 patch 02/19] ARM: shmobile: cpuidle: remove shmobile_enter_wfi prototype
>
> - V2:
> * fixed cpumask NULL test for coupled state in cpuidle_register
> * added comment about structure copy
> * changed printk by pr_err
> * folded splitted message
> * fixed return code in cpuidle_register
> * updated Documentation/cpuidle/drivers.txt
> * added in the changelog dev->state_count is filled by cpuidle_enable_device
> * fixed tag for tegra in the first line patch description
> * fixed tegra2 removed tegra_tear_down_cpu = tegra20_tear_down_cpu;
>
> - V1: Initial post
>
> Tested-on: u8500
> Tested-on: at91
> Tested-on: intel i5
> Tested-on: OMAP4
> Tested-by: Kevin Hilman <khilman@linaro.org> # OMAP3, OMAP4
> Tested-by: Andrew Lunn <andrew@lunn.ch> # Kirkwood
>
> Compiled with and without CPU_IDLE for:
> u8500, at91, davinci, exynos, imx5, imx6, kirkwood, multi_v7 (for calxeda),
> omap2plus, s3c64, tegra1, tegra2, tegra3
>
> Daniel Lezcano (15):
> cpuidle: remove en_core_tk_irqen flag
> ARM: ux500: cpuidle: replace for_each_online_cpu by
> for_each_possible_cpu
> cpuidle: make a single register function for all
> ARM: ux500: cpuidle: use init/exit common routine
> ARM: at91: cpuidle: use init/exit common routine
> ARM: OMAP3: cpuidle: use init/exit common routine
> ARM: tegra: cpuidle: use init/exit common routine
> ARM: shmobile: cpuidle: use init/exit common routine
> ARM: OMAP4: cpuidle: use init/exit common routine
> ARM: tegra: cpuidle: use init/exit common routine for tegra2
> ARM: tegra: cpuidle: use init/exit common routine for tegra3
> ARM: calxeda: cpuidle: use init/exit common routine
> ARM: kirkwood: cpuidle: use init/exit common routine
> ARM: davinci: cpuidle: use init/exit common routine
> ARM: imx: cpuidle: use init/exit common routine
Whole series applied.
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
^ permalink raw reply [flat|nested] 22+ messages in thread