Input: gpio_keys - add support for interrupt only keys
Some of buttons, like power-on key or onkey, may only generate interrupts
when pressed and not actually be mapped as gpio in the system. Allow
setting gpio to invalid value and specify IRQ instead to support such
keys. The debounce timer is used not to debounce but to ignore new IRQs
coming while button is kept pressed.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
index 004ff33..a7e977f 100644
--- a/include/linux/gpio_keys.h
+++ b/include/linux/gpio_keys.h
@@ -6,7 +6,7 @@
struct gpio_keys_button {
/* Configuration parameters */
unsigned int code; /* input event code (KEY_*, SW_*) */
- int gpio;
+ int gpio; /* -1 if this key does not support gpio */
int active_low;
const char *desc;
unsigned int type; /* input event type (EV_KEY, EV_SW, EV_ABS) */
@@ -14,6 +14,7 @@
int debounce_interval; /* debounce ticks interval in msecs */
bool can_disable;
int value; /* axis value for EV_ABS */
+ unsigned int irq; /* Irq number in case of interrupt keys */
};
struct gpio_keys_platform_data {