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path: root/drivers/video
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Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/backlight/pwm_bl.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 678b27063198..bcd08b41765d 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -30,6 +30,7 @@ struct pwm_bl_data {
struct device *dev;
unsigned int lth_brightness;
unsigned int *levels;
+ bool enabled;
struct regulator *power_supply;
struct gpio_desc *enable_gpio;
unsigned int scale;
@@ -50,7 +51,7 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb)
int err;
pwm_get_state(pb->pwm, &state);
- if (state.enabled)
+ if (pb->enabled)
return;
err = regulator_enable(pb->power_supply);
@@ -65,6 +66,8 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb)
if (pb->enable_gpio)
gpiod_set_value_cansleep(pb->enable_gpio, 1);
+
+ pb->enabled = true;
}
static void pwm_backlight_power_off(struct pwm_bl_data *pb)
@@ -72,7 +75,7 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
struct pwm_state state;
pwm_get_state(pb->pwm, &state);
- if (!state.enabled)
+ if (!pb->enabled)
return;
if (pb->enable_gpio)
@@ -86,6 +89,7 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
pwm_apply_state(pb->pwm, &state);
regulator_disable(pb->power_supply);
+ pb->enabled = false;
}
static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness)
@@ -483,6 +487,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
pb->check_fb = data->check_fb;
pb->exit = data->exit;
pb->dev = &pdev->dev;
+ pb->enabled = false;
pb->post_pwm_on_delay = data->post_pwm_on_delay;
pb->pwm_off_delay = data->pwm_off_delay;