backlight: pwm-backlight: Use devm_gpiod_get_optional()

Make use of the new devm_gpiod_get_optional() to simplify the probe
code.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index c9c8496369b3..d7a3d13e72ec 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -239,13 +239,10 @@ static int pwm_backlight_probe(struct platform_device *pdev)
         pb->dev = &pdev->dev;
         pb->enabled = false;
 
-        pb->enable_gpio = devm_gpiod_get(&pdev->dev, "enable");
+        pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable");
         if (IS_ERR(pb->enable_gpio)) {
                 ret = PTR_ERR(pb->enable_gpio);
-                if (ret == -ENOENT)
-                        pb->enable_gpio = NULL;
-                else
-                        goto err_alloc;
+                goto err_alloc;
         }
 
         /*