forked from luck/tmp_suning_uos_patched
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: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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@ -94,6 +94,8 @@
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#define OMAP24XX_GPIO_SYSCONFIG 0x0010
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#define OMAP24XX_GPIO_SYSSTATUS 0x0014
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#define OMAP24XX_GPIO_IRQSTATUS1 0x0018
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#define OMAP24XX_GPIO_IRQSTATUS2 0x0028
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#define OMAP24XX_GPIO_IRQENABLE2 0x002c
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#define OMAP24XX_GPIO_IRQENABLE1 0x001c
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#define OMAP24XX_GPIO_CTRL 0x0030
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#define OMAP24XX_GPIO_OE 0x0034
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@ -529,6 +531,10 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
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return;
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}
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__raw_writel(gpio_mask, reg);
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/* Workaround for clearing DSP GPIO interrupts to allow retention */
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if (cpu_is_omap2420())
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__raw_writel(gpio_mask, bank->base + OMAP24XX_GPIO_IRQSTATUS2);
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}
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static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
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