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Input: gpio_keys - add support for EV_ABS

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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>
This commit is contained in:
Alexander Stein
2011-04-11 23:34:37 -07:00
committed by Dmitry Torokhov
parent def179c271
commit 92a47674f5
2 changed files with 11 additions and 5 deletions
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9
drivers/input/keyboard/gpio_keys.c
View File

@@ -324,7 +324,12 @@ static void gpio_keys_report_event(struct gpio_button_data *bdata)
unsigned int type = button->type ?: EV_KEY; unsigned int type = button->type ?: EV_KEY;
int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low; 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); 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_button_data *bdata,
struct gpio_keys_button *button) 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; struct device *dev = &pdev->dev;
unsigned long irqflags; unsigned long irqflags;
int irq, error; int irq, error;

7
include/linux/gpio_keys.h
View File

@@ -3,14 +3,15 @@
struct gpio_keys_button { struct gpio_keys_button {
/* Configuration parameters */ /* Configuration parameters */
int code; /* input event code (KEY_*, SW_*) */ unsigned int code; /* input event code (KEY_*, SW_*) */
int gpio; int gpio;
int active_low; int active_low;
char *desc; const char *desc;
int type; /* input event type (EV_KEY, EV_SW) */ unsigned int type; /* input event type (EV_KEY, EV_SW, EV_ABS) */
int wakeup; /* configure the button as a wake-up source */ int wakeup; /* configure the button as a wake-up source */
int debounce_interval; /* debounce ticks interval in msecs */ int debounce_interval; /* debounce ticks interval in msecs */
bool can_disable; bool can_disable;
int value; /* axis value for EV_ABS */
}; };
struct gpio_keys_platform_data { struct gpio_keys_platform_data {