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>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index eb3006361ee4..73e58a96ab99 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -324,7 +324,12 @@ static void gpio_keys_report_event(struct gpio_button_data *bdata)
         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 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
                                          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;