Commit f113fe4e authored by Eric Miao's avatar Eric Miao
Browse files

ARM: pxa: introduce pxa2xx_clock_sysclass for clock suspend/resume 



Signed-off-by: default avatarEric Miao <eric.y.miao@gmail.com>
parent 2a125dd5

arch/arm/mach-pxa/clock-pxa2xx.c

+26 −0
Original line number Diff line number Diff line
@@ -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,

};

arch/arm/mach-pxa/clock.h

+3 −0
Original line number Diff line number Diff line 
#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 = {				\

arch/arm/mach-pxa/pxa25x.c

+3 −4
Original line number Diff line number Diff line
@@ -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)

arch/arm/mach-pxa/pxa27x.c

+3 −4
Original line number Diff line number Diff line
@@ -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)