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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

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