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ARM: EXYNOS: Move the power sequence call in the cpu_pm notifier

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The code to initiate and exit the powerdown sequence is the same in
pm.c and cpuidle.c.

Let's split the common part in the pm.c and reuse it from the cpu_pm notifier.

That is one more step forward to make the cpuidle driver arch indenpendant.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Daniel Lezcano 2014-05-09 06:55:12 +09:00 committed by Kukjin Kim
parent 3681bafeb1
commit 0ebc13e2a2
2 changed files with 22 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
arch/arm/mach-exynos/cpuidle.c
View file

@ -29,7 +29,6 @@
#include <mach/map.h>
#include "common.h"
#include "regs-pmu.h"
static int idle_finisher(unsigned long flags)
{
@ -43,31 +42,10 @@ static int exynos_enter_core0_aftr(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
unsigned long tmp;
/* Setting Central Sequence Register for power down mode */
tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION);
tmp &= ~S5P_CENTRAL_LOWPWR_CFG;
__raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
cpu_pm_enter();
cpu_suspend(0, idle_finisher);
cpu_pm_exit();
/*
* If PMU failed while entering sleep mode, WFI will be
* ignored by PMU and then exiting cpu_do_idle().
* S5P_CENTRAL_LOWPWR_CFG bit will not be set automatically
* in this situation.
*/
tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION);
if (!(tmp & S5P_CENTRAL_LOWPWR_CFG)) {
tmp |= S5P_CENTRAL_LOWPWR_CFG;
__raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
/* Clear wakeup state register */
__raw_writel(0x0, S5P_WAKEUP_STAT);
}
return index;
}

27
arch/arm/mach-exynos/pm.c
View file

@ -279,15 +279,21 @@ static void exynos_pm_prepare(void)
__raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0);
}
static int exynos_pm_suspend(void)
static void exynos_pm_central_suspend(void)
{
unsigned long tmp;
/* Setting Central Sequence Register for power down mode */
tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION);
tmp &= ~S5P_CENTRAL_LOWPWR_CFG;
__raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
}
static int exynos_pm_suspend(void)
{
unsigned long tmp;
exynos_pm_central_suspend();
/* Setting SEQ_OPTION register */
@ -300,7 +306,7 @@ static int exynos_pm_suspend(void)
return 0;
}
static void exynos_pm_resume(void)
static int exynos_pm_central_resume(void)
{
unsigned long tmp;
@ -317,9 +323,17 @@ static void exynos_pm_resume(void)
/* clear the wakeup state register */
__raw_writel(0x0, S5P_WAKEUP_STAT);
/* No need to perform below restore code */
goto early_wakeup;
return -1;
}
return 0;
}
static void exynos_pm_resume(void)
{
if (exynos_pm_central_resume())
goto early_wakeup;
if (!soc_is_exynos5250())
exynos_cpu_restore_register();
@ -424,8 +438,10 @@ static int exynos_cpu_pm_notifier(struct notifier_block *self,
switch (cmd) {
case CPU_PM_ENTER:
if (cpu == 0)
if (cpu == 0) {
exynos_pm_central_suspend();
exynos_cpu_save_register();
}
break;
case CPU_PM_EXIT:
@ -433,6 +449,7 @@ static int exynos_cpu_pm_notifier(struct notifier_block *self,
if (!soc_is_exynos5250())
scu_enable(S5P_VA_SCU);
exynos_cpu_restore_register();
exynos_pm_central_resume();
}
break;
}