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ARM: pxa: introduce pxa3xx_clock_sysclass for clock suspend/resume

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Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Eric Miao 2010-11-23 17:07:48 +08:00
parent f113fe4e84
commit aae8224ddd
4 changed files with 51 additions and 28 deletions
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8
arch/arm/mach-pxa/clock-pxa2xx.c
View File

@ -54,3 +54,11 @@ struct sysdev_class pxa2xx_clock_sysclass = {
.suspend = pxa2xx_clock_suspend,
.resume = pxa2xx_clock_resume,
};
static int __init pxa2xx_clock_init(void)
{
if (cpu_is_pxa2xx())
return sysdev_class_register(&pxa2xx_clock_sysclass);
return 0;
}
postcore_initcall(pxa2xx_clock_init);

38
arch/arm/mach-pxa/clock-pxa3xx.c
View File

@ -159,3 +159,41 @@ const struct clkops clk_pxa3xx_pout_ops = {
.enable = clk_pout_enable,
.disable = clk_pout_disable,
};
#ifdef CONFIG_PM
static uint32_t cken[2];
static uint32_t accr;
static int pxa3xx_clock_suspend(struct sys_device *d, pm_message_t state)
{
cken[0] = CKENA;
cken[1] = CKENB;
accr = ACCR;
return 0;
}
static int pxa3xx_clock_resume(struct sys_device *d)
{
ACCR = accr;
CKENA = cken[0];
CKENB = cken[1];
return 0;
}
#else
#define pxa3xx_clock_suspend NULL
#define pxa3xx_clock_resume NULL
#endif
struct sysdev_class pxa3xx_clock_sysclass = {
.name = "pxa3xx-clock",
.suspend = pxa3xx_clock_suspend,
.resume = pxa3xx_clock_resume,
};
static int __init pxa3xx_clock_init(void)
{
if (cpu_is_pxa3xx())
return sysdev_class_register(&pxa3xx_clock_sysclass);
return 0;
}
postcore_initcall(pxa3xx_clock_init);

2
arch/arm/mach-pxa/clock.h
View File

@ -72,4 +72,6 @@ extern const struct clkops clk_pxa3xx_pout_ops;
extern void clk_pxa3xx_cken_enable(struct clk *);
extern void clk_pxa3xx_cken_disable(struct clk *);
extern struct sysdev_class pxa3xx_clock_sysclass;
#endif

31
arch/arm/mach-pxa/pxa3xx.c
View File

@ -103,30 +103,6 @@ static struct clk_lookup pxa3xx_clkregs[] = {
static void __iomem *sram;
static unsigned long wakeup_src;
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
enum { SLEEP_SAVE_CKENA,
SLEEP_SAVE_CKENB,
SLEEP_SAVE_ACCR,
SLEEP_SAVE_COUNT,
};
static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
{
SAVE(CKENA);
SAVE(CKENB);
SAVE(ACCR);
}
static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save)
{
RESTORE(ACCR);
RESTORE(CKENA);
RESTORE(CKENB);
}
/*
* Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic
* memory controller has to be reinitialised, so we place some code
@ -225,9 +201,6 @@ static int pxa3xx_cpu_pm_valid(suspend_state_t state)
}
static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
.save_count = SLEEP_SAVE_COUNT,
.save = pxa3xx_cpu_pm_save,
.restore = pxa3xx_cpu_pm_restore,
.valid = pxa3xx_cpu_pm_valid,
.enter = pxa3xx_cpu_pm_enter,
};
@ -466,7 +439,9 @@ static struct sys_device pxa3xx_sysdev[] = {
.cls = &pxa3xx_mfp_sysclass,
}, {
.cls = &pxa_gpio_sysclass,
},
}, {
.cls = &pxa3xx_clock_sysclass,
}
};
static int __init pxa3xx_init(void)