Commit 40c670f0 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Kevin Hilman
Browse files

OMAP3: PM: GPIO context save/restore 



Add context save and restore to enable off-mode.

Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent a2d3e7ba

arch/arm/plat-omap/gpio.c

+92 −0
Original line number Diff line number Diff line
@@ -290,6 +290,23 @@ static struct gpio_bank gpio_bank_34xx[6] = { 
		METHOD_GPIO_24XX },

};



struct omap3_gpio_regs {

	u32 sysconfig;

	u32 irqenable1;

	u32 irqenable2;

	u32 wake_en;

	u32 ctrl;

	u32 oe;

	u32 leveldetect0;

	u32 leveldetect1;

	u32 risingdetect;

	u32 fallingdetect;

	u32 dataout;

	u32 setwkuena;

	u32 setdataout;

};



static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS];

#endif



#ifdef CONFIG_ARCH_OMAP4
@@ -2036,6 +2053,81 @@ void omap2_gpio_resume_after_retention(void) 


#endif



#ifdef CONFIG_ARCH_OMAP34XX

/* save the registers of bank 2-6 */

void omap_gpio_save_context(void)

{

	int i;



	/* saving banks from 2-6 only since GPIO1 is in WKUP */

	for (i = 1; i < gpio_bank_count; i++) {

		struct gpio_bank *bank = &gpio_bank[i];

		gpio_context[i].sysconfig =

			__raw_readl(bank->base + OMAP24XX_GPIO_SYSCONFIG);

		gpio_context[i].irqenable1 =

			__raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1);

		gpio_context[i].irqenable2 =

			__raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE2);

		gpio_context[i].wake_en =

			__raw_readl(bank->base + OMAP24XX_GPIO_WAKE_EN);

		gpio_context[i].ctrl =

			__raw_readl(bank->base + OMAP24XX_GPIO_CTRL);

		gpio_context[i].oe =

			__raw_readl(bank->base + OMAP24XX_GPIO_OE);

		gpio_context[i].leveldetect0 =

			__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);

		gpio_context[i].leveldetect1 =

			__raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);

		gpio_context[i].risingdetect =

			__raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);

		gpio_context[i].fallingdetect =

			__raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);

		gpio_context[i].dataout =

			__raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT);

		gpio_context[i].setwkuena =

			__raw_readl(bank->base + OMAP24XX_GPIO_SETWKUENA);

		gpio_context[i].setdataout =

			__raw_readl(bank->base + OMAP24XX_GPIO_SETDATAOUT);

	}

}



/* restore the required registers of bank 2-6 */

void omap_gpio_restore_context(void)

{

	int i;



	for (i = 1; i < gpio_bank_count; i++) {

		struct gpio_bank *bank = &gpio_bank[i];

		__raw_writel(gpio_context[i].sysconfig,

				bank->base + OMAP24XX_GPIO_SYSCONFIG);

		__raw_writel(gpio_context[i].irqenable1,

				bank->base + OMAP24XX_GPIO_IRQENABLE1);

		__raw_writel(gpio_context[i].irqenable2,

				bank->base + OMAP24XX_GPIO_IRQENABLE2);

		__raw_writel(gpio_context[i].wake_en,

				bank->base + OMAP24XX_GPIO_WAKE_EN);

		__raw_writel(gpio_context[i].ctrl,

				bank->base + OMAP24XX_GPIO_CTRL);

		__raw_writel(gpio_context[i].oe,

				bank->base + OMAP24XX_GPIO_OE);

		__raw_writel(gpio_context[i].leveldetect0,

				bank->base + OMAP24XX_GPIO_LEVELDETECT0);

		__raw_writel(gpio_context[i].leveldetect1,

				bank->base + OMAP24XX_GPIO_LEVELDETECT1);

		__raw_writel(gpio_context[i].risingdetect,

				bank->base + OMAP24XX_GPIO_RISINGDETECT);

		__raw_writel(gpio_context[i].fallingdetect,

				bank->base + OMAP24XX_GPIO_FALLINGDETECT);

		__raw_writel(gpio_context[i].dataout,

				bank->base + OMAP24XX_GPIO_DATAOUT);

		__raw_writel(gpio_context[i].setwkuena,

				bank->base + OMAP24XX_GPIO_SETWKUENA);

		__raw_writel(gpio_context[i].setdataout,

				bank->base + OMAP24XX_GPIO_SETDATAOUT);

	}

}

#endif



/*

 * This may get called early from board specific init

 * for boards that have interrupts routed via FPGA.

arch/arm/plat-omap/include/plat/gpio.h

+2 −1
Original line number Diff line number Diff line
@@ -76,7 +76,8 @@ extern void omap2_gpio_prepare_for_retention(void); 
extern void omap2_gpio_resume_after_retention(void);

extern void omap_set_gpio_debounce(int gpio, int enable);

extern void omap_set_gpio_debounce_time(int gpio, int enable);



extern void omap_gpio_save_context(void);

extern void omap_gpio_restore_context(void);

/*-------------------------------------------------------------------------*/



/* Wrappers for "new style" GPIO calls, using the new infrastructure

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