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Subject[PATCH v18 09/10] drm/panel: 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/panel/panel-innolux-p079zca.c | 24 ++++-----------------
drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c | 28 +++++--------------------
drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 27 ++++--------------------
3 files changed, 13 insertions(+), 66 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
index 4c1b29eec..57df39b5c 100644
--- a/drivers/gpu/drm/panel/panel-innolux-p079zca.c
+++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
@@ -215,7 +215,6 @@ MODULE_DEVICE_TABLE(of, innolux_of_match);
static int innolux_panel_add(struct innolux_panel *innolux)
{
struct device *dev = &innolux->link->dev;
- struct device_node *np;
int err;

innolux->supply = devm_regulator_get(dev, "power");
@@ -230,37 +229,22 @@ static int innolux_panel_add(struct innolux_panel *innolux)
innolux->enable_gpio = NULL;
}

- np = of_parse_phandle(dev->of_node, "backlight", 0);
- if (np) {
- innolux->backlight = of_find_backlight_by_node(np);
- of_node_put(np);
+ innolux->backlight = devm_of_find_backlight(dev);

- if (!innolux->backlight)
- return -EPROBE_DEFER;
- }
+ if (IS_ERR(innolux->backlight))
+ return PTR_ERR(innolux->backlight);

drm_panel_init(&innolux->base);
innolux->base.funcs = &innolux_panel_funcs;
innolux->base.dev = &innolux->link->dev;

- err = drm_panel_add(&innolux->base);
- if (err < 0)
- goto put_backlight;
-
- return 0;
-
-put_backlight:
- put_device(&innolux->backlight->dev);
-
- return err;
+ return drm_panel_add(&innolux->base);
}

static void innolux_panel_del(struct innolux_panel *innolux)
{
if (innolux->base.dev)
drm_panel_remove(&innolux->base);
-
- put_device(&innolux->backlight->dev);
}

static int innolux_panel_probe(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 072c0fc79..6bf8730f1 100644
--- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
@@ -318,8 +318,7 @@ MODULE_DEVICE_TABLE(of, sharp_of_match);

static int sharp_panel_add(struct sharp_panel *sharp)
{
- struct device_node *np;
- int err;
+ struct device *dev = &sharp->link1->dev;

sharp->mode = &default_mode;

@@ -327,30 +326,16 @@ static int sharp_panel_add(struct sharp_panel *sharp)
if (IS_ERR(sharp->supply))
return PTR_ERR(sharp->supply);

- np = of_parse_phandle(sharp->link1->dev.of_node, "backlight", 0);
- if (np) {
- sharp->backlight = of_find_backlight_by_node(np);
- of_node_put(np);
+ sharp->backlight = devm_of_find_backlight(dev);

- if (!sharp->backlight)
- return -EPROBE_DEFER;
- }
+ if (IS_ERR(sharp->backlight))
+ return PTR_ERR(sharp->backlight);

drm_panel_init(&sharp->base);
sharp->base.funcs = &sharp_panel_funcs;
sharp->base.dev = &sharp->link1->dev;

- err = drm_panel_add(&sharp->base);
- if (err < 0)
- goto put_backlight;
-
- return 0;
-
-put_backlight:
- if (sharp->backlight)
- put_device(&sharp->backlight->dev);
-
- return err;
+ return drm_panel_add(&sharp->base);
}

static void sharp_panel_del(struct sharp_panel *sharp)
@@ -358,9 +343,6 @@ static void sharp_panel_del(struct sharp_panel *sharp)
if (sharp->base.dev)
drm_panel_remove(&sharp->base);

- if (sharp->backlight)
- put_device(&sharp->backlight->dev);
-
if (sharp->link2)
put_device(&sharp->link2->dev);
}
diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
index 8a5137963..494aa9b16 100644
--- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -253,8 +253,6 @@ static const struct drm_panel_funcs sharp_nt_panel_funcs = {
static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
{
struct device *dev = &sharp_nt->dsi->dev;
- struct device_node *np;
- int ret;

sharp_nt->mode = &default_mode;

@@ -271,39 +269,22 @@ static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
gpiod_set_value(sharp_nt->reset_gpio, 0);
}

- np = of_parse_phandle(dev->of_node, "backlight", 0);
- if (np) {
- sharp_nt->backlight = of_find_backlight_by_node(np);
- of_node_put(np);
+ sharp_nt->backlight = devm_of_find_backlight(dev);

- if (!sharp_nt->backlight)
- return -EPROBE_DEFER;
- }
+ if (IS_ERR(sharp_nt->backlight))
+ return PTR_ERR(sharp_nt->backlight);

drm_panel_init(&sharp_nt->base);
sharp_nt->base.funcs = &sharp_nt_panel_funcs;
sharp_nt->base.dev = &sharp_nt->dsi->dev;

- ret = drm_panel_add(&sharp_nt->base);
- if (ret < 0)
- goto put_backlight;
-
- return 0;
-
-put_backlight:
- if (sharp_nt->backlight)
- put_device(&sharp_nt->backlight->dev);
-
- return ret;
+ return drm_panel_add(&sharp_nt->base);
}

static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
{
if (sharp_nt->base.dev)
drm_panel_remove(&sharp_nt->base);
-
- if (sharp_nt->backlight)
- put_device(&sharp_nt->backlight->dev);
}

static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
--
2.11.0
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