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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2019-10-22 10:36:30 +0200
committerLee Jones <lee.jones@linaro.org>2019-11-11 11:34:01 +0000
commit9afa302473f3ed925acd2499b624fdc0c527e0d0 (patch)
treecd795a5bdac02b78ca762444abad5cff20b49160 /drivers/video
parentbacklight: gpio: Use a helper variable for &pdev->dev (diff)
downloadlinux-dev-9afa302473f3ed925acd2499b624fdc0c527e0d0.tar.xz
linux-dev-9afa302473f3ed925acd2499b624fdc0c527e0d0.zip
backlight: gpio: Pull gpio_backlight_initial_power_state() into probe
The probe function in the gpio-backlight driver is quite short. If we pull gpio_backlight_initial_power_state() into probe we can drop two more fields from struct gpio_backlight and shrink the driver code. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/backlight/gpio_backlight.c38
1 files changed, 14 insertions, 24 deletions
diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
index d6969fae25cd..75409ddfba3e 100644
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -17,11 +17,8 @@
#include <linux/slab.h>
struct gpio_backlight {
- struct device *dev;
struct device *fbdev;
-
struct gpio_desc *gpiod;
- int def_value;
};
static int gpio_backlight_get_next_brightness(struct backlight_device *bl)
@@ -60,41 +57,24 @@ static const struct backlight_ops gpio_backlight_ops = {
.check_fb = gpio_backlight_check_fb,
};
-static int gpio_backlight_initial_power_state(struct gpio_backlight *gbl)
-{
- struct device_node *node = gbl->dev->of_node;
-
- /* Not booted with device tree or no phandle link to the node */
- if (!node || !node->phandle)
- return gbl->def_value ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
-
- /* if the enable GPIO is disabled, do not enable the backlight */
- if (gpiod_get_direction(gbl->gpiod) == 0 &&
- gpiod_get_value_cansleep(gbl->gpiod) == 0)
- return FB_BLANK_POWERDOWN;
-
- return FB_BLANK_UNBLANK;
-}
-
static int gpio_backlight_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct gpio_backlight_platform_data *pdata = dev_get_platdata(dev);
+ struct device_node *of_node = dev->of_node;
struct backlight_properties props;
struct backlight_device *bl;
struct gpio_backlight *gbl;
- int ret, init_brightness;
+ int ret, init_brightness, def_value;
gbl = devm_kzalloc(dev, sizeof(*gbl), GFP_KERNEL);
if (gbl == NULL)
return -ENOMEM;
- gbl->dev = dev;
-
if (pdata)
gbl->fbdev = pdata->fbdev;
- gbl->def_value = device_property_read_bool(dev, "default-on");
+ def_value = device_property_read_bool(dev, "default-on");
gbl->gpiod = devm_gpiod_get(dev, NULL, GPIOD_ASIS);
if (IS_ERR(gbl->gpiod)) {
@@ -115,7 +95,17 @@ static int gpio_backlight_probe(struct platform_device *pdev)
return PTR_ERR(bl);
}
- bl->props.power = gpio_backlight_initial_power_state(gbl);
+ /* Set the initial power state */
+ if (!of_node || !of_node->phandle)
+ /* Not booted with device tree or no phandle link to the node */
+ bl->props.power = def_value ? FB_BLANK_UNBLANK
+ : FB_BLANK_POWERDOWN;
+ else if (gpiod_get_direction(gbl->gpiod) == 0 &&
+ gpiod_get_value_cansleep(gbl->gpiod) == 0)
+ bl->props.power = FB_BLANK_POWERDOWN;
+ else
+ bl->props.power = FB_BLANK_UNBLANK;
+
bl->props.brightness = 1;
init_brightness = gpio_backlight_get_next_brightness(bl);