[PATCH 34/41] ARM: OMAP1: clock: Remove noop code

Arnd Bergmann
2022-04-19T13:53:15Z

From: Janusz Krzysztofik <jmkrzyszt@gmail.com>

There are some OMAP1 clock code bits that have no effect:
- crystal_type variable is set to 0 but never changed, then
crystal_type == 2 condition is never true and ck_ref.rate never set to
19200000,
- clk->ops->allow_idle() is called from omap_clk_enable_autoidle_all() but
that op is not configured for any clock, then the function does nothing
and the op field is not needed,
- ENABLE_ON_INIT flag is set for some clocks but is never checked by any
code, then not needed.
Drop that code.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/mach-omap1/clock.c | 17 -----------------
arch/arm/mach-omap1/clock.h | 3 ---
arch/arm/mach-omap1/clock_data.c | 8 +-------
3 files changed, 1 insertion(+), 27 deletions(-)

diff --git a/arch/arm/mach-omap1/clock.c b/arch/arm/mach-omap1/clock.c
index 5ea8ec026a85..e5bd4d3b742d 100644
--- a/arch/arm/mach-omap1/clock.c
+++ b/arch/arm/mach-omap1/clock.c
@@ -798,22 +798,6 @@ void clk_unregister(struct clk *clk)
}
EXPORT_SYMBOL(clk_unregister);

-int omap_clk_enable_autoidle_all(void)
-{
- struct clk *c;
- unsigned long flags;
-
- spin_lock_irqsave(&clockfw_lock, flags);
-
- list_for_each_entry(c, &clocks, node)
- if (c->ops->allow_idle)
- c->ops->allow_idle(c);
-
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return 0;
-}
-
/*
* Low level helpers
*/
@@ -871,7 +855,6 @@ static int __init clk_disable_unused(void)
return 0;
}
late_initcall(clk_disable_unused);
-late_initcall(omap_clk_enable_autoidle_all);
#endif

#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
diff --git a/arch/arm/mach-omap1/clock.h b/arch/arm/mach-omap1/clock.h
index 7bebd488f1be..8025e4a22469 100644
--- a/arch/arm/mach-omap1/clock.h
+++ b/arch/arm/mach-omap1/clock.h
@@ -53,7 +53,6 @@ struct omap_clk {
struct clkops {
int (*enable)(struct clk *);
void (*disable)(struct clk *);
- void (*allow_idle)(struct clk *);
};

/*
@@ -64,7 +63,6 @@ struct clkops {
#define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */
#define CLOCK_IDLE_CONTROL (1 << 1)
#define CLOCK_NO_IDLE_PARENT (1 << 2)
-#define ENABLE_ON_INIT (1 << 3) /* Enable upon framework init */

/**
* struct clk - OMAP struct clk
@@ -135,7 +133,6 @@ extern void clk_unregister(struct clk *clk);
extern void propagate_rate(struct clk *clk);
extern unsigned long followparent_recalc(struct clk *clk);
unsigned long omap_fixed_divisor_recalc(struct clk *clk);
-extern int omap_clk_enable_autoidle_all(void);

extern const struct clkops clkops_null;

diff --git a/arch/arm/mach-omap1/clock_data.c b/arch/arm/mach-omap1/clock_data.c
index 57d3752babf8..9b9c9fcc61c2 100644
--- a/arch/arm/mach-omap1/clock_data.c
+++ b/arch/arm/mach-omap1/clock_data.c
@@ -92,8 +92,7 @@ static struct arm_idlect1_clk ck_dpll1out = {
.name = "ck_dpll1out",
.ops = &clkops_generic,
.parent = &ck_dpll1,
- .flags = CLOCK_IDLE_CONTROL | ENABLE_REG_32BIT |
- ENABLE_ON_INIT,
+ .flags = CLOCK_IDLE_CONTROL | ENABLE_REG_32BIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_CKOUT_ARM,
.recalc = &followparent_recalc,
@@ -146,7 +145,6 @@ static struct clk arm_gpio_ck = {
.name = "ick",
.ops = &clkops_generic,
.parent = &ck_dpll1,
- .flags = ENABLE_ON_INIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT2),
.enable_bit = EN_GPIOCK,
.recalc = &followparent_recalc,
@@ -316,7 +314,6 @@ static struct clk tc2_ck = {
.name = "tc2_ck",
.ops = &clkops_generic,
.parent = &tc_ck.clk,
- .flags = ENABLE_ON_INIT,
.enable_reg = OMAP1_IO_ADDRESS(ARM_IDLECT3),
.enable_bit = EN_TC2_CK,
.recalc = &followparent_recalc,
@@ -762,7 +759,6 @@ u32 cpu_mask;
int __init omap1_clk_init(void)
{
struct omap_clk *c;
- int crystal_type = 0; /* Default 12 MHz */
u32 reg;

#ifdef CONFIG_DEBUG_LL
@@ -810,8 +806,6 @@ int __init omap1_clk_init(void)

if (cpu_is_omap7xx())
ck_ref.rate = 13000000;
- if (cpu_is_omap16xx() && crystal_type == 2)
- ck_ref.rate = 19200000;

pr_info("Clocks: ARM_SYSST: 0x%04x DPLL_CTL: 0x%04x ARM_CKCTL: 0x%04x\n",
omap_readw(ARM_SYSST), omap_readw(DPLL_CTL),
--
2.29.2