linux-kernel - [PATCH 1/2] Input: gpio_keys - Also send release events for ABS codes

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Date:   Tue,  1 Nov 2016 11:25:03 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Maarten ter Huurne <maarten@...ewalker.org>,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 1/2] Input: gpio_keys - Also send release events for ABS codes

Right now, the gpio-keys driver is mostly used with EV_KEY event types.
However, this driver (and its devicetree bindings) support specifying
a different input type, like EV_ABS, even though this doesn't work in
practice: "key pressed" events are correctly received and treated, but
"key released" are silently ignored.

With this commit, keys configured as EV_ABS will inject an event with
the value 0 when released.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/input/keyboard/gpio_keys.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 2909365..7018c49 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -369,6 +369,8 @@ static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
 	if (type == EV_ABS) {
 		if (state)
 			input_event(input, type, button->code, button->value);
+		else
+			input_event(input, type, button->code, 0);
 	} else {
 		input_event(input, type, button->code, !!state);
 	}
-- 
2.9.3