linux-kernel - [PATCH] drm/panel: simple: Use devm_gpiod_get

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Date:	Fri, 25 Jul 2014 23:47:25 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	gnurou@...il.com, Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH] drm/panel: simple: Use devm_gpiod_get_optional()

Use the new devm_gpiod_get_optional() to simplify the probe code.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 drivers/gpu/drm/panel/panel-simple.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index a251361..91bf566 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -185,16 +185,14 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	if (IS_ERR(panel->supply))
 		return PTR_ERR(panel->supply);
 
-	panel->enable_gpio = devm_gpiod_get(dev, "enable");
+	panel->enable_gpio = devm_gpiod_get_optional(dev, "enable");
 	if (IS_ERR(panel->enable_gpio)) {
 		err = PTR_ERR(panel->enable_gpio);
-		if (err != -ENOENT) {
-			dev_err(dev, "failed to request GPIO: %d\n", err);
-			return err;
-		}
+		dev_err(dev, "failed to request GPIO: %d\n", err);
+		return err;
+	}
 
-		panel->enable_gpio = NULL;
-	} else {
+	if (panel->enable_gpio) {
 		err = gpiod_direction_output(panel->enable_gpio, 0);
 		if (err < 0) {
 			dev_err(dev, "failed to setup GPIO: %d\n", err);
-- 
2.0.2

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