[PATCH] drm/bridge: lontium-lt9611uxc: use reset_gpio as optional parameter

[Vladimir Yakovlev]

On some systems the reset pin may not be used.

Signed-off-by: Vladimir Yakovlev <vovch...@gmail.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 d3ce5dd30420..3868ad05e011 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);
 
@@ -455,7 +458,7 @@ 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