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Commit bee7930f authored by Hiroshi DOYU's avatar Hiroshi DOYU Committed by Tony Lindgren
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ARM: OMAP: GPIO: IRQSTATUS2 workaround for retention state 



In OMAP2420, an incoming GPIO interrupt always sets both GPIO_IRQSTATUS1
and GPIO_IRQSTATUS2, even if the relevant bit is disabled in
GPIO_IRQENABLE1/2 and DSP doesn't use GPIO at all. GPIO_IRQSTATUS1
is for MPU and GPIO_IRQSTATUS2 is for DSP. If IRQSTATUS is set, this
will prevent the system from going to idle state. This patch also clears
IRQSTATUS2 to avoid the above situation.

Signed-off-by: default avatarHiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: default avatarJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 0d9356cb

arch/arm/plat-omap/gpio.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -94,6 +94,8 @@ 
#define OMAP24XX_GPIO_SYSCONFIG		0x0010

#define OMAP24XX_GPIO_SYSCONFIG		0x0010

#define OMAP24XX_GPIO_SYSSTATUS		0x0014

#define OMAP24XX_GPIO_SYSSTATUS		0x0014

#define OMAP24XX_GPIO_IRQSTATUS1	0x0018

#define OMAP24XX_GPIO_IRQSTATUS1	0x0018

#define OMAP24XX_GPIO_IRQSTATUS2	0x0028

#define OMAP24XX_GPIO_IRQENABLE2	0x002c

#define OMAP24XX_GPIO_IRQENABLE1	0x001c

#define OMAP24XX_GPIO_IRQENABLE1	0x001c

#define OMAP24XX_GPIO_CTRL		0x0030

#define OMAP24XX_GPIO_CTRL		0x0030

#define OMAP24XX_GPIO_OE		0x0034

#define OMAP24XX_GPIO_OE		0x0034
@@ -529,6 +531,10 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) 
		return;

		return;

	}

	}

	__raw_writel(gpio_mask, reg);

	__raw_writel(gpio_mask, reg);



	/* Workaround for clearing DSP GPIO interrupts to allow retention */

	if (cpu_is_omap2420())

		__raw_writel(gpio_mask, bank->base + OMAP24XX_GPIO_IRQSTATUS2);

}

}





static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)

static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)