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Subject[PATCH v18 10/10] drm/omapdrm: Use of_find_backlight helper
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.madhyastha@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
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