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Commit 8865b9b6 authored by Kevin Hilman's avatar Kevin Hilman
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OMAP3: GPIO: disable GPIO debounce clocks on idle 



Ensure GPIO debounce clocks are disabled when idle.  Otherwise,
clocks will prevent PER powerdomain from entering retention.

Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 43ffcd9a

arch/arm/plat-omap/gpio.c

+8 −0
Original line number Original line Diff line number Diff line
@@ -196,6 +196,7 @@ struct gpio_bank { 
	struct gpio_chip chip;

	struct gpio_chip chip;

	struct clk *dbck;

	struct clk *dbck;

	u32 mod_usage;

	u32 mod_usage;

	u32 dbck_enable_mask;

};

};





#define METHOD_MPUIO		0

#define METHOD_MPUIO		0
@@ -647,6 +648,7 @@ void omap_set_gpio_debounce(int gpio, int enable) 
		goto done;

		goto done;





	if (cpu_is_omap34xx() || cpu_is_omap44xx()) {

	if (cpu_is_omap34xx() || cpu_is_omap44xx()) {

		bank->dbck_enable_mask = val;

		if (enable)

		if (enable)

			clk_enable(bank->dbck);

			clk_enable(bank->dbck);

		else

		else
@@ -2054,6 +2056,9 @@ void omap2_gpio_prepare_for_idle(int power_state) 
		struct gpio_bank *bank = &gpio_bank[i];

		struct gpio_bank *bank = &gpio_bank[i];

		u32 l1, l2;

		u32 l1, l2;





		if (bank->dbck_enable_mask)

			clk_disable(bank->dbck);



		if (power_state > PWRDM_POWER_OFF)

		if (power_state > PWRDM_POWER_OFF)

			continue;

			continue;
@@ -2118,6 +2123,9 @@ void omap2_gpio_resume_after_idle(void) 
		struct gpio_bank *bank = &gpio_bank[i];

		struct gpio_bank *bank = &gpio_bank[i];

		u32 l, gen, gen0, gen1;

		u32 l, gen, gen0, gen1;





		if (bank->dbck_enable_mask)

			clk_enable(bank->dbck);



		if (!workaround_enabled)

		if (!workaround_enabled)

			continue;

			continue;