Commit 82dbb9d3 authored by Eero Nurkkala's avatar Eero Nurkkala Committed by Tony Lindgren
Browse files

OMAP: GPIO: Avoid generating extra IRQs 



It is possible for GPIO IRQ lines configured with
falling edge triggering only to get IRQs at the
rising edge upon the exit of offmode. And vice
versa. Prevent such IRQs to arrive by generating
the IRQ obeying the detection scheme.

Signed-off-by: default avatarEero Nurkkala <ext-eero.nurkkala@nokia.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 79e44c95

arch/arm/plat-omap/gpio.c

+23 −4
Original line number Diff line number Diff line
@@ -1895,7 +1895,7 @@ void omap2_gpio_resume_after_retention(void) 
		return;

	for (i = 0; i < gpio_bank_count; i++) {

		struct gpio_bank *bank = &gpio_bank[i];

		u32 l;

		u32 l, gen, gen0, gen1;



		if (!(bank->enabled_non_wakeup_gpios))

			continue;
@@ -1916,14 +1916,33 @@ void omap2_gpio_resume_after_retention(void) 
#endif

		l ^= bank->saved_datain;

		l &= bank->non_wakeup_gpios;

		if (l) {



		/*

		 * No need to generate IRQs for the rising edge for gpio IRQs

		 * configured with falling edge only; and vice versa.

		 */

		gen0 = l & bank->saved_fallingdetect;

		gen0 &= bank->saved_datain;



		gen1 = l & bank->saved_risingdetect;

		gen1 &= ~(bank->saved_datain);



		/* FIXME: Consider GPIO IRQs with level detections properly! */

		gen = l & (~(bank->saved_fallingdetect) &

				~(bank->saved_risingdetect));

		/* Consider all GPIO IRQs needed to be updated */

		gen |= gen0 | gen1;



		if (gen) {

			u32 old0, old1;

#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \

			defined(CONFIG_ARCH_OMAP4)

			old0 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);

			old1 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);

			__raw_writel(old0 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT0);

			__raw_writel(old1 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT1);

			__raw_writel(old0 | gen, bank->base +

					OMAP24XX_GPIO_LEVELDETECT0);

			__raw_writel(old1 | gen, bank->base +

					OMAP24XX_GPIO_LEVELDETECT1);

			__raw_writel(old0, bank->base + OMAP24XX_GPIO_LEVELDETECT0);

			__raw_writel(old1, bank->base + OMAP24XX_GPIO_LEVELDETECT1);

#endif

CRA Git | Maintained and supported by SUSTech CRA and CCSE