提交 bee7930f 编写于 作者: H Hiroshi DOYU 提交者: Tony Lindgren

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: NHiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
上级 0d9356cb
......@@ -94,6 +94,8 @@
#define OMAP24XX_GPIO_SYSCONFIG 0x0010
#define OMAP24XX_GPIO_SYSSTATUS 0x0014
#define OMAP24XX_GPIO_IRQSTATUS1 0x0018
#define OMAP24XX_GPIO_IRQSTATUS2 0x0028
#define OMAP24XX_GPIO_IRQENABLE2 0x002c
#define OMAP24XX_GPIO_IRQENABLE1 0x001c
#define OMAP24XX_GPIO_CTRL 0x0030
#define OMAP24XX_GPIO_OE 0x0034
......@@ -529,6 +531,10 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
return;
}
__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)
......
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