linux-kernel - [PATCH 1/2] input: gpio-keys: add support for disable button from DT

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Message-ID: <1452598370-28509-1-git-send-email-ldewangan@nvidia.com>
Date:	Tue, 12 Jan 2016 17:02:49 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<robh+dt@...nel.org>, <dmitry.torokhov@...il.com>
CC:	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<linus.walleij@...aro.org>, <bjorn.andersson@...ymobile.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-input@...r.kernel.org>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH 1/2] input: gpio-keys: add support for disable button from DT

Add support to disable the button from DT via status property
if given button is not supporting on given platforms.

This will help to re-use the existing dtsi file with status
enable/disable across platforms.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
 drivers/input/keyboard/gpio_keys.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index bef317f..cf068cb 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -632,6 +632,14 @@ gpio_keys_get_devtree_pdata(struct device *dev)
 	for_each_child_of_node(node, pp) {
 		enum of_gpio_flags flags;
 
+		/* Ignore the button if status of node is disabled */
+		error = of_device_is_available(pp);
+		if (!error) {
+			dev_info(dev, "Button %s is ignored\n", pp->name);
+			pdata->nbuttons--;
+			continue;
+		}
+
 		button = &pdata->buttons[i++];
 
 		button->gpio = of_get_gpio_flags(pp, 0, &flags);
-- 
2.1.4