linux-kernel - [PATCH] gpu:drm:tilcdc: backlight node never found

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Date:	Thu, 13 Feb 2014 14:47:38 +0100
From:	Heiko Schocher <hs@...x.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Heiko Schocher <hs@...x.de>, Anatolij Gustschin <agust@...x.de>,
	Benoit Parrot <bparrot@...com>,
	Rob Clark <robdclark@...il.com>,
	David Airlie <airlied@...ux.ie>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH] gpu:drm:tilcdc: backlight node never found

In panel_probe() the backlight node is never found, correct this.

Signed-off-by: Heiko Schocher <hs@...x.de>
Cc: Anatolij Gustschin <agust@...x.de>
Cc: Benoit Parrot <bparrot@...com>
Cc: Rob Clark <robdclark@...il.com>
Cc: David Airlie <airlied@...ux.ie>
Cc: Grant Likely <grant.likely@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Tomi Valkeinen <tomi.valkeinen@...com>
Cc: Sachin Kamat <sachin.kamat@...aro.org>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org
Cc: devicetree@...r.kernel.org
---
 drivers/gpu/drm/tilcdc/tilcdc_panel.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
index 86c6732..0b97cf4 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
@@ -356,6 +356,7 @@ static struct of_device_id panel_of_match[];
 static int panel_probe(struct platform_device *pdev)
 {
 	struct device_node *node = pdev->dev.of_node;
+	struct device_node *backlight_node;
 	struct panel_module *panel_mod;
 	struct tilcdc_module *mod;
 	struct pinctrl *pinctrl;
@@ -395,9 +396,15 @@ static int panel_probe(struct platform_device *pdev)
 
 	mod->preferred_bpp = panel_mod->info->bpp;
 
-	panel_mod->backlight = of_find_backlight_by_node(node);
-	if (panel_mod->backlight)
-		dev_info(&pdev->dev, "found backlight\n");
+	backlight_node = of_parse_phandle(pdev->dev.of_node, "backlight", 0);
+	if (backlight_node) {
+		panel_mod->backlight =
+			of_find_backlight_by_node(backlight_node);
+		if (panel_mod->backlight)
+			dev_info(&pdev->dev, "found backlight\n");
+	} else {
+		dev_warn(&pdev->dev, "backlight node missing...\n");
+	}
 
 	return 0;
 
-- 
1.8.3.1

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