Input: gpio_keys - add support for EV_ABS
With this patch you can setup a group of GPIOs representing a specific
position on an EV_ABS axis.
Signed-off-by: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index eb30063..73e58a9 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -324,7 +324,12 @@
unsigned int type = button->type ?: EV_KEY;
int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low;
- input_event(input, type, button->code, !!state);
+ if (type == EV_ABS) {
+ if (state)
+ input_event(input, type, button->code, button->value);
+ } else {
+ input_event(input, type, button->code, !!state);
+ }
input_sync(input);
}
@@ -363,7 +368,7 @@
struct gpio_button_data *bdata,
struct gpio_keys_button *button)
{
- char *desc = button->desc ? button->desc : "gpio_keys";
+ const char *desc = button->desc ? button->desc : "gpio_keys";
struct device *dev = &pdev->dev;
unsigned long irqflags;
int irq, error;
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
index dd1a56f..3204edf 100644
--- a/include/linux/gpio_keys.h
+++ b/include/linux/gpio_keys.h
@@ -3,14 +3,15 @@
struct gpio_keys_button {
/* Configuration parameters */
- int code; /* input event code (KEY_*, SW_*) */
+ unsigned int code; /* input event code (KEY_*, SW_*) */
int gpio;
int active_low;
- char *desc;
- int type; /* input event type (EV_KEY, EV_SW) */
+ const char *desc;
+ unsigned int type; /* input event type (EV_KEY, EV_SW, EV_ABS) */
int wakeup; /* configure the button as a wake-up source */
int debounce_interval; /* debounce ticks interval in msecs */
bool can_disable;
+ int value; /* axis value for EV_ABS */
};
struct gpio_keys_platform_data {