[PATCH v18 10/10] drm/omapdrm: Use of_find_backlight helper

[Meghana Madhyastha]

Replace of_find_backlight_by_node and of the code around it
with of_find_backlight helper to avoid repetition of code.

Signed-off-by: Meghana Madhyastha <meghana.madhyas...@gmail.com>
---
Changes in v18: 
-Fixed warnings resulting from passing device_node* to of_find_backlight.
 Fixed it by passing struct device* to of_find_backlight

 drivers/gpu/drm/omapdrm/displays/panel-dpi.c | 33 ++++++++++------------------
 1 file changed, 11 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c 
b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
index ac9596251..93b7a176d 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c
@@ -156,14 +156,14 @@ static struct omap_dss_driver panel_dpi_ops = {
 static int panel_dpi_probe_of(struct platform_device *pdev)
 {
        struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+       struct device *dev = &pdev->dev;
        struct device_node *node = pdev->dev.of_node;
-       struct device_node *bl_node;
        struct omap_dss_device *in;
        int r;
        struct display_timing timing;
        struct gpio_desc *gpio;
 
-       gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
+       gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
        if (IS_ERR(gpio))
                return PTR_ERR(gpio);
 
@@ -175,47 +175,36 @@ static int panel_dpi_probe_of(struct platform_device 
*pdev)
         * timing and order relative to the enable gpio. So for now it's just
         * ensured that the reset line isn't active.
         */
-       gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
+       gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
        if (IS_ERR(gpio))
                return PTR_ERR(gpio);
 
-       ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc");
+       ddata->vcc_supply = devm_regulator_get(dev, "vcc");
        if (IS_ERR(ddata->vcc_supply))
                return PTR_ERR(ddata->vcc_supply);
 
-       bl_node = of_parse_phandle(node, "backlight", 0);
-       if (bl_node) {
-               ddata->backlight = of_find_backlight_by_node(bl_node);
-               of_node_put(bl_node);
+       ddata->backlight = of_find_backlight(dev);
 
-               if (!ddata->backlight)
-                       return -EPROBE_DEFER;
-       }
+       if (IS_ERR(ddata->backlight))
+               return PTR_ERR(ddata->backlight);
 
        r = of_get_display_timing(node, "panel-timing", &timing);
        if (r) {
-               dev_err(&pdev->dev, "failed to get video timing\n");
-               goto error_free_backlight;
+               dev_err(dev, "failed to get video timing\n");
+               return r;
        }
 
        videomode_from_timing(&timing, &ddata->vm);
 
        in = omapdss_of_find_source_for_first_ep(node);
        if (IS_ERR(in)) {
-               dev_err(&pdev->dev, "failed to find video source\n");
-               r = PTR_ERR(in);
-               goto error_free_backlight;
+               dev_err(dev, "failed to find video source\n");
+               return PTR_ERR(in);
        }
 
        ddata->in = in;
 
        return 0;
-
-error_free_backlight:
-       if (ddata->backlight)
-               put_device(&ddata->backlight->dev);
-
-       return r;
 }
 
 static int panel_dpi_probe(struct platform_device *pdev)
-- 
2.11.0