diff options
| author | Sandor Yu <Sandor.yu@nxp.com> | 2019-01-08 17:42:10 +0530 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2019-11-25 15:45:18 +0800 |
| commit | 4fa439eff9be4603357c592145668405843ee088 (patch) | |
| tree | acbbe66af3a8fc239079d4aba842605180a9671f /drivers/video/backlight | |
| parent | 219d54332a09e8d8741c1e1982f5eae56099de85 (diff) | |
MLK-12932-01: pwm backlight: Add fb name check feature
Add fb name check function pwm_backlight_check_fb_name(),
pwm driver can banding to fb with fb name when driver working
in device tree architecture.
Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
Diffstat (limited to 'drivers/video/backlight')
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 746eebc411df..40ebb5feb7d7 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -38,6 +38,7 @@ 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) @@ -222,6 +223,17 @@ int pwm_backlight_brightness_default(struct device *dev, return 0; } +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) { @@ -234,12 +246,18 @@ static int pwm_backlight_parse_dt(struct device *dev, int length; u32 value; int ret; + const char *names; if (!node) return -ENODEV; memset(data, 0, sizeof(*data)); + if (!of_property_read_string(node, "fb-names", &names)) { + strcpy(data->fb_id, names); + data->check_fb = &pwm_backlight_check_fb_name; + } + /* * These values are optional and set as 0 by default, the out values * are modified only if a valid u32 value can be decoded. @@ -361,7 +379,6 @@ static int pwm_backlight_parse_dt(struct device *dev, data->max_brightness--; } - return 0; } @@ -484,6 +501,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->enabled = false; pb->post_pwm_on_delay = data->post_pwm_on_delay; pb->pwm_off_delay = data->pwm_off_delay; + strcpy(pb->fb_id, data->fb_id); pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_ASIS); |