openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: EXYNOS: Refactor the pm code to use DT based lookup 

Refactoring the pm.c to avoid using "soc_is_exynos" checks,
instead use the DT based lookup.

While at it, consolidate the common code across SoCs
and create static helper functions.

Signed-off-by: Vikas Sajjan <vikas.sajjan@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Vikas Sajjan 2014-09-24 16:45:14 +09:00 committed by Kukjin Kim
parent 32ed35ff22
commit 066da1ae52
2 changed files with 126 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

167
arch/arm/mach-exynos/pm.c
View File

@ -36,6 +36,8 @@
#include "regs-pmu.h"
#include "regs-sys.h"
#define REG_TABLE_END (-1U)
/**
* struct exynos_wkup_irq - Exynos GIC to PMU IRQ mapping
* @hwirq: Hardware IRQ signal of the GIC
@ -59,6 +61,21 @@ static struct sleep_save exynos_core_save[] = {
SAVE_ITEM(S5P_SROM_BC3),
};
struct exynos_pm_data {
const struct exynos_wkup_irq *wkup_irq;
struct sleep_save *extra_save;
int num_extra_save;
unsigned int wake_disable_mask;
unsigned int *release_ret_regs;
void (*pm_prepare)(void);
void (*pm_resume)(void);
int (*pm_suspend)(void);
int (*cpu_suspend)(unsigned long);
};
struct exynos_pm_data *pm_data;
/*
* GIC wake-up support
*/
@ -77,14 +94,24 @@ static const struct exynos_wkup_irq exynos5250_wkup_irq[] = {
{ /* sentinel */ },
};
unsigned int exynos_release_ret_regs[] = {
S5P_PAD_RET_MAUDIO_OPTION,
S5P_PAD_RET_GPIO_OPTION,
S5P_PAD_RET_UART_OPTION,
S5P_PAD_RET_MMCA_OPTION,
S5P_PAD_RET_MMCB_OPTION,
S5P_PAD_RET_EBIA_OPTION,
S5P_PAD_RET_EBIB_OPTION,
REG_TABLE_END,
};
static int exynos_irq_set_wake(struct irq_data *data, unsigned int state)
{
const struct exynos_wkup_irq *wkup_irq;
if (soc_is_exynos5250())
wkup_irq = exynos5250_wkup_irq;
else
wkup_irq = exynos4_wkup_irq;
if (!pm_data->wkup_irq)
return -ENOENT;
wkup_irq = pm_data->wkup_irq;
while (wkup_irq->mask) {
if (wkup_irq->hwirq == data->hwirq) {
@ -229,15 +256,8 @@ void exynos_enter_aftr(void)
cpu_pm_exit();
}
static int exynos_cpu_suspend(unsigned long arg)
static int exynos_cpu_do_idle(void)
{
#ifdef CONFIG_CACHE_L2X0
outer_flush_all();
#endif
if (soc_is_exynos5250())
flush_cache_all();
/* issue the standby signal into the pm unit. */
cpu_do_idle();
@ -245,29 +265,44 @@ static int exynos_cpu_suspend(unsigned long arg)
return 1; /* Aborting suspend */
}
static void exynos_pm_prepare(void)
static int exynos_cpu_suspend(unsigned long arg)
{
unsigned int tmp;
flush_cache_all();
outer_flush_all();
return exynos_cpu_do_idle();
}
static void exynos_pm_set_wakeup_mask(void)
{
/* Set wake-up mask registers */
pmu_raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK);
pmu_raw_writel(exynos_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK);
}
s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save));
if (soc_is_exynos5250())
s3c_pm_do_save(exynos5_sys_save, ARRAY_SIZE(exynos5_sys_save));
static void exynos_pm_enter_sleep_mode(void)
{
/* Set value of power down register for sleep mode */
exynos_sys_powerdown_conf(SYS_SLEEP);
pmu_raw_writel(S5P_CHECK_SLEEP, S5P_INFORM1);
/* ensure at least INFORM0 has the resume address */
pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0);
}
static void exynos_pm_prepare(void)
{
/* Set wake-up mask registers */
exynos_pm_set_wakeup_mask();
s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save));
if (pm_data->extra_save)
s3c_pm_do_save(pm_data->extra_save,
pm_data->num_extra_save);
exynos_pm_enter_sleep_mode();
}
static int exynos_pm_suspend(void)
{
unsigned long tmp;
@ -285,6 +320,15 @@ static int exynos_pm_suspend(void)
return 0;
}
static void exynos_pm_release_retention(void)
{
unsigned int i;
for (i = 0; (pm_data->release_ret_regs[i] != REG_TABLE_END); i++)
pmu_raw_writel(EXYNOS_WAKEUP_FROM_LOWPWR,
pm_data->release_ret_regs[i]);
}
static void exynos_pm_resume(void)
{
if (exynos_pm_central_resume())
@ -294,18 +338,11 @@ static void exynos_pm_resume(void)
exynos_cpu_restore_register();
/* For release retention */
exynos_pm_release_retention();
pmu_raw_writel((1 << 28), S5P_PAD_RET_MAUDIO_OPTION);
pmu_raw_writel((1 << 28), S5P_PAD_RET_GPIO_OPTION);
pmu_raw_writel((1 << 28), S5P_PAD_RET_UART_OPTION);
pmu_raw_writel((1 << 28), S5P_PAD_RET_MMCA_OPTION);
pmu_raw_writel((1 << 28), S5P_PAD_RET_MMCB_OPTION);
pmu_raw_writel((1 << 28), S5P_PAD_RET_EBIA_OPTION);
pmu_raw_writel((1 << 28), S5P_PAD_RET_EBIB_OPTION);
if (soc_is_exynos5250())
s3c_pm_do_restore(exynos5_sys_save,
ARRAY_SIZE(exynos5_sys_save));
if (pm_data->extra_save)
s3c_pm_do_restore_core(pm_data->extra_save,
pm_data->num_extra_save);
s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save));
@ -316,15 +353,8 @@ static void exynos_pm_resume(void)
/* Clear SLEEP mode set in INFORM1 */
pmu_raw_writel(0x0, S5P_INFORM1);
return;
}
static struct syscore_ops exynos_pm_syscore_ops = {
.suspend = exynos_pm_suspend,
.resume = exynos_pm_resume,
};
/*
* Suspend Ops
*/
@ -348,11 +378,12 @@ static int exynos_suspend_enter(suspend_state_t state)
}
s3c_pm_save_uarts();
exynos_pm_prepare();
if (pm_data->pm_prepare)
pm_data->pm_prepare();
flush_cache_all();
s3c_pm_check_store();
ret = cpu_suspend(0, exynos_cpu_suspend);
ret = cpu_suspend(0, pm_data->cpu_suspend);
if (ret)
return ret;
@ -387,18 +418,70 @@ static const struct platform_suspend_ops exynos_suspend_ops = {
.valid = suspend_valid_only_mem,
};
static const struct exynos_pm_data exynos4_pm_data = {
.wkup_irq = exynos4_wkup_irq,
.wake_disable_mask = ((0xFF << 8) | (0x1F << 1)),
.release_ret_regs = exynos_release_ret_regs,
.pm_suspend = exynos_pm_suspend,
.pm_resume = exynos_pm_resume,
.pm_prepare = exynos_pm_prepare,
.cpu_suspend = exynos_cpu_suspend,
};
static const struct exynos_pm_data exynos5250_pm_data = {
.wkup_irq = exynos5250_wkup_irq,
.wake_disable_mask = ((0xFF << 8) | (0x1F << 1)),
.release_ret_regs = exynos_release_ret_regs,
.extra_save = exynos5_sys_save,
.num_extra_save = ARRAY_SIZE(exynos5_sys_save),
.pm_suspend = exynos_pm_suspend,
.pm_resume = exynos_pm_resume,
.pm_prepare = exynos_pm_prepare,
.cpu_suspend = exynos_cpu_suspend,
};
static struct of_device_id exynos_pmu_of_device_ids[] = {
{
.compatible = "samsung,exynos4210-pmu",
.data = &exynos4_pm_data,
}, {
.compatible = "samsung,exynos4212-pmu",
.data = &exynos4_pm_data,
}, {
.compatible = "samsung,exynos4412-pmu",
.data = &exynos4_pm_data,
}, {
.compatible = "samsung,exynos5250-pmu",
.data = &exynos5250_pm_data,
},
{ /*sentinel*/ },
};
static struct syscore_ops exynos_pm_syscore_ops;
void __init exynos_pm_init(void)
{
const struct of_device_id *match;
u32 tmp;
of_find_matching_node_and_match(NULL, exynos_pmu_of_device_ids, &match);
if (!match) {
pr_err("Failed to find PMU node\n");
return;
}
pm_data = (struct exynos_pm_data *) match->data;
/* Platform-specific GIC callback */
gic_arch_extn.irq_set_wake = exynos_irq_set_wake;
/* All wakeup disable */
tmp = pmu_raw_readl(S5P_WAKEUP_MASK);
tmp |= ((0xFF << 8) | (0x1F << 1));
tmp |= pm_data->wake_disable_mask;
pmu_raw_writel(tmp, S5P_WAKEUP_MASK);
exynos_pm_syscore_ops.suspend = pm_data->pm_suspend;
exynos_pm_syscore_ops.resume = pm_data->pm_resume;
register_syscore_ops(&exynos_pm_syscore_ops);
suspend_set_ops(&exynos_suspend_ops);
}

1
arch/arm/mach-exynos/regs-pmu.h
View File

@ -21,6 +21,7 @@
#define S5P_USE_STANDBY_WFI0 (1 << 16)
#define S5P_USE_STANDBY_WFE0 (1 << 24)
#define EXYNOS_WAKEUP_FROM_LOWPWR (1 << 28)
#define EXYNOS_SWRESET 0x0400
#define EXYNOS5440_SWRESET 0x00C4