[PATCH v7 22/26] gpio/omap: save and restore debounce registers

Tarun Kanti DebBarma
2011-09-13T13:03:27Z

From: Nishanth Menon <nm@ti.com>

GPIO debounce registers need to be saved and restored for proper functioning
of driver. To save the registers, we cannot cut the clock before the save,
hence move the clk disable after the save.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
---
drivers/gpio/gpio-omap.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index c84f620..a1aeeed 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -42,6 +42,8 @@ struct gpio_regs {
u32 risingdetect;
u32 fallingdetect;
u32 dataout;
+ u32 debounce;
+ u32 debounce_en;
};

struct gpio_bank {
@@ -202,6 +204,8 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
bank->dbck_enable_mask = val;

__raw_writel(val, reg);
+ bank->context.debounce = debounce;
+ bank->context.debounce_en = val;
}

static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
@@ -1323,6 +1327,12 @@ static void omap_gpio_restore_context(struct gpio_bank *bank)
__raw_writel(bank->context.fallingdetect,
bank->base + bank->regs->fallingdetect);
__raw_writel(bank->context.dataout, bank->base + bank->regs->dataout);
+ if (bank->dbck_enable_mask) {
+ __raw_writel(bank->context.debounce, bank->base +
+ bank->regs->debounce);
+ __raw_writel(bank->context.debounce_en,
+ bank->base + bank->regs->debounce_en);
+ }
}
#else
#define omap_gpio_suspend NULL
--
1.7.0.4