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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>
This commit is contained in:
Nishanth Menon 2011-09-09 19:08:58 +05:30 committed by Tarun Kanti DebBarma
parent 41d87cbd66
commit ae547354a8
1 changed files with 12 additions and 0 deletions
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12
drivers/gpio/gpio-omap.c
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@ -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