[PATCH v2 3/3] Input: gpio-keys - add EV_REL event type support

[Xiong Nandi <xndchn@gmail.com>]

The polled path handles EV_REL but the interrupt path silently
ignores it. Widen the type check so EV_REL goes through the same
reporting and shared-counter logic as EV_ABS.

Signed-off-by: Xiong Nandi <xndchn@gmail.com>
---
 drivers/input/keyboard/gpio_keys.c | 6 +++---
 include/linux/gpio_keys.h          | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 4cbfd5a273bd..652a6932c52f 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -375,7 +375,7 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
 		return;
 	}
 
-	if (type == EV_ABS) {
+	if (type == EV_ABS || type == EV_REL) {
 		if (state && !bdata->axis_active) {
 			bdata->axis_active = true;
 			atomic_inc(bdata->axis_count);
@@ -960,13 +960,13 @@ static int gpio_keys_probe(struct platform_device *pdev)
 
 	fwnode_handle_put(child);
 
-	/* Allocate shared axis counters for EV_ABS buttons */
+	/* Allocate shared axis counters for EV_ABS/EV_REL buttons */
 	for (i = 0; i < pdata->nbuttons; i++) {
 		struct gpio_button_data *bdata = &ddata->data[i];
 		unsigned int type = bdata->button->type ?: EV_KEY;
 		int j;
 
-		if (type != EV_ABS)
+		if (type != EV_ABS && type != EV_REL)
 			continue;
 
 		/* Reuse counter from an earlier button with same (type, code) */
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
index 80fa930b04c6..75a745a32fe1 100644
--- a/include/linux/gpio_keys.h
+++ b/include/linux/gpio_keys.h
@@ -13,13 +13,13 @@ struct device;
  * @active_low:		%true indicates that button is considered
  *			depressed when gpio is low
  * @desc:		label that will be attached to button's gpio
- * @type:		input event type (%EV_KEY, %EV_SW, %EV_ABS)
+ * @type:		input event type (%EV_KEY, %EV_SW, %EV_ABS, %EV_REL)
  * @wakeup:		configure the button as a wake-up source
  * @wakeup_event_action:	event action to trigger wakeup
  * @debounce_interval:	debounce ticks interval in msecs
  * @can_disable:	%true indicates that userspace is allowed to
  *			disable button via sysfs
- * @value:		axis value for %EV_ABS
+ * @value:		axis value for %EV_ABS/%EV_REL
  * @irq:		Irq number in case of interrupt keys
  * @wakeirq:		Optional dedicated wake-up interrupt
  */
-- 
2.25.1