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ARM: pxa: introduce pxa2xx_clock_sysclass for clock suspend/resume

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Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Eric Miao 2010-11-23 17:00:03 +08:00
parent 2a125dd56b
commit f113fe4e84
4 changed files with 35 additions and 8 deletions
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26
arch/arm/mach-pxa/clock-pxa2xx.c
View File

@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sysdev.h>
#include <mach/pxa2xx-regs.h>
@ -28,3 +29,28 @@ const struct clkops clk_pxa2xx_cken_ops = {
.enable = clk_pxa2xx_cken_enable,
.disable = clk_pxa2xx_cken_disable,
};
#ifdef CONFIG_PM
static uint32_t saved_cken;
static int pxa2xx_clock_suspend(struct sys_device *d, pm_message_t state)
{
saved_cken = CKEN;
return 0;
}
static int pxa2xx_clock_resume(struct sys_device *d)
{
CKEN = saved_cken;
return 0;
}
#else
#define pxa2xx_clock_suspend NULL
#define pxa2xx_clock_resume NULL
#endif
struct sysdev_class pxa2xx_clock_sysclass = {
.name = "pxa2xx-clock",
.suspend = pxa2xx_clock_suspend,
.resume = pxa2xx_clock_resume,
};

3
arch/arm/mach-pxa/clock.h
View File

@ -1,3 +1,4 @@
#include <linux/sysdev.h>
#include <asm/clkdev.h>
struct clkops {
@ -53,6 +54,8 @@ extern const struct clkops clk_pxa2xx_cken_ops;
void clk_pxa2xx_cken_enable(struct clk *clk);
void clk_pxa2xx_cken_disable(struct clk *clk);
extern struct sysdev_class pxa2xx_clock_sysclass;
#ifdef CONFIG_PXA3xx
#define DEFINE_PXA3_CKEN(_name, _cken, _rate, _delay) \
struct clk clk_##_name = { \

7
arch/arm/mach-pxa/pxa25x.c
View File

@ -222,20 +222,17 @@ static struct clk_lookup pxa25x_hwuart_clkreg =
*/
enum {
SLEEP_SAVE_PSTR,
SLEEP_SAVE_CKEN,
SLEEP_SAVE_COUNT
};
static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
{
SAVE(CKEN);
SAVE(PSTR);
}
static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
{
RESTORE(CKEN);
RESTORE(PSTR);
}
@ -358,7 +355,9 @@ static struct sys_device pxa25x_sysdev[] = {
.cls = &pxa2xx_mfp_sysclass,
}, {
.cls = &pxa_gpio_sysclass,
},
}, {
.cls = &pxa2xx_clock_sysclass,
}
};
static int __init pxa25x_init(void)

7
arch/arm/mach-pxa/pxa27x.c
View File

@ -258,7 +258,6 @@ int __init pxa27x_set_pwrmode(unsigned int mode)
*/
enum {
SLEEP_SAVE_PSTR,
SLEEP_SAVE_CKEN,
SLEEP_SAVE_MDREFR,
SLEEP_SAVE_PCFR,
SLEEP_SAVE_COUNT
@ -269,7 +268,6 @@ void pxa27x_cpu_pm_save(unsigned long *sleep_save)
sleep_save[SLEEP_SAVE_MDREFR] = __raw_readl(MDREFR);
SAVE(PCFR);
SAVE(CKEN);
SAVE(PSTR);
}
@ -280,7 +278,6 @@ void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
PSSR = PSSR_RDH | PSSR_PH;
RESTORE(CKEN);
RESTORE(PSTR);
}
@ -438,7 +435,9 @@ static struct sys_device pxa27x_sysdev[] = {
.cls = &pxa2xx_mfp_sysclass,
}, {
.cls = &pxa_gpio_sysclass,
},
}, {
.cls = &pxa2xx_clock_sysclass,
}
};
static int __init pxa27x_init(void)