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Commit 16dfdbf0 authored by eric miao's avatar eric miao Committed by Russell King
Browse files

[ARM] pxa: introduce sysdev for GPIO register saving/restoring 



Signed-off-by: default avatareric miao <eric.miao@marvell.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent c0165504

arch/arm/mach-pxa/generic.c

+57 −0
Original line number Original line Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <linux/ioport.h>

#include <linux/ioport.h>

#include <linux/pm.h>

#include <linux/pm.h>

#include <linux/string.h>

#include <linux/string.h>

#include <linux/sysdev.h>





#include <asm/hardware.h>

#include <asm/hardware.h>

#include <asm/irq.h>

#include <asm/irq.h>
@@ -226,3 +227,59 @@ void __init pxa_map_io(void) 
	iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));

	iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));

	get_clk_frequency_khz(1);

	get_clk_frequency_khz(1);

}

}



#ifdef CONFIG_PM



static unsigned long saved_gplr[4];

static unsigned long saved_gpdr[4];

static unsigned long saved_grer[4];

static unsigned long saved_gfer[4];



static int pxa_gpio_suspend(struct sys_device *dev, pm_message_t state)

{

	int i, gpio;



	for (gpio = 0, i = 0; gpio < pxa_last_gpio; gpio += 32, i++) {

		saved_gplr[i] = GPLR(gpio);

		saved_gpdr[i] = GPDR(gpio);

		saved_grer[i] = GRER(gpio);

		saved_gfer[i] = GFER(gpio);



		/* Clear GPIO transition detect bits */

		GEDR(gpio) = GEDR(gpio);

	}

	return 0;

}



static int pxa_gpio_resume(struct sys_device *dev)

{

	int i, gpio;



	for (gpio = 0, i = 0; gpio < pxa_last_gpio; gpio += 32, i++) {

		/* restore level with set/clear */

		GPSR(gpio) = saved_gplr[i];

		GPCR(gpio) = ~saved_gplr[i];



		GRER(gpio) = saved_grer[i];

		GFER(gpio) = saved_gfer[i];

		GPDR(gpio) = saved_gpdr[i];

	}

	return 0;

}

#else

#define pxa_gpio_suspend	NULL

#define pxa_gpio_resume		NULL

#endif



struct sysdev_class pxa_gpio_sysclass = {

	.name		= "gpio",

	.suspend	= pxa_gpio_suspend,

	.resume		= pxa_gpio_resume,

};



static int __init pxa_gpio_init(void)

{

	return sysdev_class_register(&pxa_gpio_sysclass);

}



core_initcall(pxa_gpio_init);

arch/arm/mach-pxa/generic.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -54,3 +54,4 @@ extern unsigned pxa3xx_get_memclk_frequency_10khz(void); 
#endif

#endif





extern struct sysdev_class pxa_irq_sysclass;

extern struct sysdev_class pxa_irq_sysclass;

extern struct sysdev_class pxa_gpio_sysclass;

arch/arm/mach-pxa/pxa25x.c

+2 −17
Original line number Original line Diff line number Diff line
@@ -142,11 +142,6 @@ static struct clk pxa25x_clks[] = { 
#define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x

#define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x

#define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]

#define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]





#define RESTORE_GPLEVEL(n) do { \

	GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \

	GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \

} while (0)



/*

/*

 * List of global PXA peripheral registers to preserve.

 * List of global PXA peripheral registers to preserve.

 * More ones like CP and general purpose register values are preserved

 * More ones like CP and general purpose register values are preserved
@@ -154,10 +149,6 @@ static struct clk pxa25x_clks[] = { 
 */

 */

enum {	SLEEP_SAVE_START = 0,

enum {	SLEEP_SAVE_START = 0,





	SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2,

	SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2,

	SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2,

	SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2,

	SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,

	SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,





	SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,

	SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
@@ -174,10 +165,6 @@ enum { SLEEP_SAVE_START = 0, 




static void pxa25x_cpu_pm_save(unsigned long *sleep_save)

static void pxa25x_cpu_pm_save(unsigned long *sleep_save)

{

{

	SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2);

	SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2);

	SAVE(GRER0); SAVE(GRER1); SAVE(GRER2);

	SAVE(GFER0); SAVE(GFER1); SAVE(GFER2);

	SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);

	SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);





	SAVE(GAFR0_L); SAVE(GAFR0_U);

	SAVE(GAFR0_L); SAVE(GAFR0_U);
@@ -197,13 +184,9 @@ static void pxa25x_cpu_pm_restore(unsigned long *sleep_save) 
	PSPR = 0;

	PSPR = 0;





	/* restore registers */

	/* restore registers */

	RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2);

	RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2);

	RESTORE(GAFR0_L); RESTORE(GAFR0_U);

	RESTORE(GAFR0_L); RESTORE(GAFR0_U);

	RESTORE(GAFR1_L); RESTORE(GAFR1_U);

	RESTORE(GAFR1_L); RESTORE(GAFR1_U);

	RESTORE(GAFR2_L); RESTORE(GAFR2_U);

	RESTORE(GAFR2_L); RESTORE(GAFR2_U);

	RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2);

	RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2);

	RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);

	RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);





	PSSR = PSSR_RDH | PSSR_PH;

	PSSR = PSSR_RDH | PSSR_PH;
@@ -302,6 +285,8 @@ static struct platform_device *pxa25x_devices[] __initdata = { 
static struct sys_device pxa25x_sysdev[] = {

static struct sys_device pxa25x_sysdev[] = {

	{

	{

		.cls	= &pxa_irq_sysclass,

		.cls	= &pxa_irq_sysclass,

	}, {

		.cls	= &pxa_gpio_sysclass,

	},

	},

};

};

arch/arm/mach-pxa/pxa27x.c

+2 −21
Original line number Original line Diff line number Diff line
@@ -172,11 +172,6 @@ static struct clk pxa27x_clks[] = { 
#define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x

#define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x

#define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]

#define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]





#define RESTORE_GPLEVEL(n) do { \

	GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \

	GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \

} while (0)



/*

/*

 * List of global PXA peripheral registers to preserve.

 * List of global PXA peripheral registers to preserve.

 * More ones like CP and general purpose register values are preserved

 * More ones like CP and general purpose register values are preserved
@@ -184,10 +179,6 @@ static struct clk pxa27x_clks[] = { 
 */

 */

enum {	SLEEP_SAVE_START = 0,

enum {	SLEEP_SAVE_START = 0,





	SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2, SLEEP_SAVE_GPLR3,

	SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2, SLEEP_SAVE_GPDR3,

	SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2, SLEEP_SAVE_GRER3,

	SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2, SLEEP_SAVE_GFER3,

	SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,

	SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,





	SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,

	SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
@@ -208,10 +199,6 @@ enum { SLEEP_SAVE_START = 0, 




void pxa27x_cpu_pm_save(unsigned long *sleep_save)

void pxa27x_cpu_pm_save(unsigned long *sleep_save)

{

{

	SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2); SAVE(GPLR3);

	SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2); SAVE(GPDR3);

	SAVE(GRER0); SAVE(GRER1); SAVE(GRER2); SAVE(GRER3);

	SAVE(GFER0); SAVE(GFER1); SAVE(GFER2); SAVE(GFER3);

	SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);

	SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);





	SAVE(GAFR0_L); SAVE(GAFR0_U);

	SAVE(GAFR0_L); SAVE(GAFR0_U);
@@ -225,9 +212,6 @@ void pxa27x_cpu_pm_save(unsigned long *sleep_save) 




	SAVE(CKEN);

	SAVE(CKEN);

	SAVE(PSTR);

	SAVE(PSTR);



	/* Clear GPIO transition detect bits */

	GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2; GEDR3 = GEDR3;

}

}





void pxa27x_cpu_pm_restore(unsigned long *sleep_save)

void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
@@ -236,15 +220,10 @@ void pxa27x_cpu_pm_restore(unsigned long *sleep_save) 
	PSPR = 0;

	PSPR = 0;





	/* restore registers */

	/* restore registers */

	RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1);

	RESTORE_GPLEVEL(2); RESTORE_GPLEVEL(3);

	RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2); RESTORE(GPDR3);

	RESTORE(GAFR0_L); RESTORE(GAFR0_U);

	RESTORE(GAFR0_L); RESTORE(GAFR0_U);

	RESTORE(GAFR1_L); RESTORE(GAFR1_U);

	RESTORE(GAFR1_L); RESTORE(GAFR1_U);

	RESTORE(GAFR2_L); RESTORE(GAFR2_U);

	RESTORE(GAFR2_L); RESTORE(GAFR2_U);

	RESTORE(GAFR3_L); RESTORE(GAFR3_U);

	RESTORE(GAFR3_L); RESTORE(GAFR3_U);

	RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2); RESTORE(GRER3);

	RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2); RESTORE(GFER3);

	RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);

	RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);





	RESTORE(MDREFR);

	RESTORE(MDREFR);
@@ -412,6 +391,8 @@ static struct sys_device pxa27x_sysdev[] = { 
	}, {

	}, {

		.id	= 1,

		.id	= 1,

		.cls	= &pxa_irq_sysclass,

		.cls	= &pxa_irq_sysclass,

	}, {

		.cls	= &pxa_gpio_sysclass,

	},

	},

};

};

arch/arm/mach-pxa/pxa3xx.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -460,6 +460,8 @@ static struct sys_device pxa3xx_sysdev[] = { 
	}, {

	}, {

		.id	= 1,

		.id	= 1,

		.cls	= &pxa_irq_sysclass,

		.cls	= &pxa_irq_sysclass,

	}, {

		.cls	= &pxa_gpio_sysclass,

	},

	},

};

};