From: Darius Augulis <augulis.darius@xxxxxxxxx>
Support for such GPIO controllers, which can't trigger on both edges at once.
Signed-off-by: Darius Augulis <augulis.darius@xxxxxxxxx>
Index: linux-2.6.29-rc5/drivers/input/keyboard/gpio_keys.c
===================================================================
--- linux-2.6.29-rc5.orig/drivers/input/keyboard/gpio_keys.c
+++ linux-2.6.29-rc5/drivers/input/keyboard/gpio_keys.c
@@ -43,8 +43,15 @@ static void gpio_keys_report_event(struc
unsigned int type = button->type ?: EV_KEY;
int state = (gpio_get_value(button->gpio) ? 1 : 0) ^ button->active_low;
+ printk("GPIO=%d\n", state);
+
input_event(input, type, button->code, !!state);
input_sync(input);
+
+ if (button->single_edge) {
+ input_event(input, type, button->code, !state);
+ input_sync(input);
+ }
}
static void gpio_check_button(unsigned long _data)
@@ -77,6 +84,7 @@ static int __devinit gpio_keys_probe(str
struct input_dev *input;
int i, error;
int wakeup = 0;
+ unsigned long irq_flags;
ddata = kzalloc(sizeof(struct gpio_keys_drvdata) +
pdata->nbuttons * sizeof(struct gpio_button_data),
@@ -141,9 +149,13 @@ static int __devinit gpio_keys_probe(str
goto fail2;
}
- error = request_irq(irq, gpio_keys_isr,
- IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_RISING |
- IRQF_TRIGGER_FALLING,
+ irq_flags = IRQF_SAMPLE_RANDOM;
+ if (button->single_edge)
+ irq_flags |= (button->active_low ? IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING);
+ else
+ irq_flags |= IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
+
+ error = request_irq(irq, gpio_keys_isr, irq_flags,
button->desc ? button->desc : "gpio_keys",
bdata);
if (error) {
Index: linux-2.6.29-rc5/include/linux/gpio_keys.h
===================================================================
--- linux-2.6.29-rc5.orig/include/linux/gpio_keys.h
+++ linux-2.6.29-rc5/include/linux/gpio_keys.h
@@ -6,6 +6,7 @@ struct gpio_keys_button {
int code; /* input event code (KEY_*, SW_*) */
int gpio;
int active_low;
+ int single_edge; /* Trigger only single egde (0-no, 1-yes) */
char *desc;
int type; /* input event type (EV_KEY, EV_SW) */
int wakeup; /* configure the button as a wake-up source */
