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ARM: EXYNOS: Encapsulate register access inside a function for pm

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That makes the code cleaner and encapsulted. The function will be
reused in the next patch.

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 06:43:27 +09:00 committed by Kukjin Kim
parent 7880e45ed0
commit 309e08c4ca
1 changed files with 40 additions and 23 deletions
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63
arch/arm/mach-exynos/pm.c
View file

@ -169,6 +169,42 @@ int exynos_cluster_power_state(int cluster)
/* For Cortex-A9 Diagnostic and Power control register */
static unsigned int save_arm_register[2];
static void exynos_cpu_save_register(void)
{
unsigned long tmp;
/* Save Power control register */
asm ("mrc p15, 0, %0, c15, c0, 0"
: "=r" (tmp) : : "cc");
save_arm_register[0] = tmp;
/* Save Diagnostic register */
asm ("mrc p15, 0, %0, c15, c0, 1"
: "=r" (tmp) : : "cc");
save_arm_register[1] = tmp;
}
static void exynos_cpu_restore_register(void)
{
unsigned long tmp;
/* Restore Power control register */
tmp = save_arm_register[0];
asm volatile ("mcr p15, 0, %0, c15, c0, 0"
: : "r" (tmp)
: "cc");
/* Restore Diagnostic register */
tmp = save_arm_register[1];
asm volatile ("mcr p15, 0, %0, c15, c0, 1"
: : "r" (tmp)
: "cc");
}
static int exynos_cpu_suspend(unsigned long arg)
{
#ifdef CONFIG_CACHE_L2X0
@ -228,17 +264,8 @@ static int exynos_pm_suspend(void)
tmp = (S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0);
__raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION);
if (!soc_is_exynos5250()) {
/* Save Power control register */
asm ("mrc p15, 0, %0, c15, c0, 0"
: "=r" (tmp) : : "cc");
save_arm_register[0] = tmp;
/* Save Diagnostic register */
asm ("mrc p15, 0, %0, c15, c0, 1"
: "=r" (tmp) : : "cc");
save_arm_register[1] = tmp;
}
if (!soc_is_exynos5250())
exynos_cpu_save_register();
return 0;
}
@ -262,19 +289,9 @@ static void exynos_pm_resume(void)
/* No need to perform below restore code */
goto early_wakeup;
}
if (!soc_is_exynos5250()) {
/* Restore Power control register */
tmp = save_arm_register[0];
asm volatile ("mcr p15, 0, %0, c15, c0, 0"
: : "r" (tmp)
: "cc");
/* Restore Diagnostic register */
tmp = save_arm_register[1];
asm volatile ("mcr p15, 0, %0, c15, c0, 1"
: : "r" (tmp)
: "cc");
}
if (!soc_is_exynos5250())
exynos_cpu_restore_register();
/* For release retention */