diff options
Diffstat (limited to 'drivers/video/backlight/pwm_bl.c')
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index baa1510a5298..e5b99ee415c0 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -41,6 +41,7 @@ struct pwm_bl_data { int brightness); int (*check_fb)(struct device *, struct fb_info *); void (*exit)(struct device *); + char fb_id[16]; }; static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness) @@ -134,6 +135,17 @@ static const struct backlight_ops pwm_backlight_ops = { }; #ifdef CONFIG_OF +static int pwm_backlight_check_fb_name(struct device *dev, struct fb_info *info) +{ + struct backlight_device *bl = dev_get_drvdata(dev); + struct pwm_bl_data *pb = bl_get_data(bl); + + if (strcmp(info->fix.id, pb->fb_id) == 0) + return true; + + return false; +} + static int pwm_backlight_parse_dt(struct device *dev, struct platform_pwm_backlight_data *data) { @@ -142,6 +154,7 @@ static int pwm_backlight_parse_dt(struct device *dev, int length; u32 value; int ret; + const char *names; if (!node) return -ENODEV; @@ -178,6 +191,11 @@ static int pwm_backlight_parse_dt(struct device *dev, data->max_brightness--; } + if (!of_property_read_string(node, "fb-names", &names)){ + strcpy(data->fb_id, names); + data->check_fb = &pwm_backlight_check_fb_name; + } + data->enable_gpio = -EINVAL; return 0; } @@ -247,6 +265,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->exit = data->exit; pb->dev = &pdev->dev; pb->enabled = false; + strcpy(pb->fb_id, data->fb_id); pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_ASIS); |