linux-kernel - [PATCH V2 1/2] input: gpio-keys: add support for disable button from DT

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Message-ID: <1452665657-9412-1-git-send-email-ldewangan@nvidia.com>
Date:	Wed, 13 Jan 2016 11:44:16 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<robh+dt@...nel.org>, <dmitry.torokhov@...il.com>,
	<pawel.moll@....com>, <mark.rutland@....com>
CC:	<galak@...eaurora.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-input@...r.kernel.org>,
	<linus.walleij@...aro.org>, <bjorn.andersson@...ymobile.com>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH V2 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>
---
Changes from V1:
- Converted print to dev_dbg.

 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..08bada8 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_dbg(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