linux-kernel - [PATCH] drm/bridge: lontium-lt9611uxc: use reset

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-prev] [day] [month] [year] [list]

Message-Id: <20250902231821.2943-4-vovchkir@gmail.com>
Date: Wed,  3 Sep 2025 02:18:21 +0300
From: Vladimir Yakovlev <vovchkir@...il.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: vovchkir@...il.com
Subject: [PATCH] drm/bridge: lontium-lt9611uxc: use reset_gpio as optional parameter

On some systems the reset pin may not be used.

Signed-off-by: Vladimir Yakovlev <vovchkir@...il.com>
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 5051cdfe2fee..1aeb5b29704b 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -179,6 +179,9 @@ static void lt9611uxc_hpd_work(struct work_struct *work)
 
 static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc)
 {
+	if (!lt9611uxc->reset_gpio)
+		return;
+
 	gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
 	msleep(20);
 
@@ -460,7 +463,7 @@ static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc)
 {
 	struct device *dev = lt9611uxc->dev;
 
-	lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	lt9611uxc->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(lt9611uxc->reset_gpio)) {
 		dev_err(dev, "failed to acquire reset gpio\n");
 		return PTR_ERR(lt9611uxc->reset_gpio);
-- 
2.34.1