gpio/omap: save and restore debounce registers

GPIO debounce registers need to be saved and restored for proper functioning
of driver.

Signed-off-by: Nishanth Menon <nm@ti.com>
tarun.kanti@ti.com: Debounce context save is moved to _set_gpio_debounce()
as part of dynamic context save to remove overhead.
Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 62c49e0f7f29..f6b2c51b2935 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -44,6 +44,8 @@ struct gpio_regs {
         u32 risingdetect;
         u32 fallingdetect;
         u32 dataout;
+        u32 debounce;
+        u32 debounce_en;
 };
 
 struct gpio_bank {
@@ -229,6 +231,10 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio,
          * that point. Therefore we have to enable dbck here.
          */
         _gpio_dbck_enable(bank);
+        if (bank->dbck_enable_mask) {
+                bank->context.debounce = debounce;
+                bank->context.debounce_en = val;
+        }
 }
 
 static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
@@ -1363,6 +1369,12 @@ 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);
+        }
 }
 #endif /* CONFIG_PM_RUNTIME */
 #else