diff options
Diffstat (limited to 'drivers/video/backlight.c')
| -rw-r--r-- | drivers/video/backlight.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/video/backlight.c b/drivers/video/backlight.c index 09c0e47af6..30d52fcb68 100644 --- a/drivers/video/backlight.c +++ b/drivers/video/backlight.c @@ -15,6 +15,15 @@ int backlight_set_brightness(struct backlight_device *bl, int brightness) if (brightness == bl->brightness_cur) return 0; + if (!bl->slew_time_ms) { + ret = bl->brightness_set(bl, brightness); + if (ret) + return ret; + + bl->brightness_cur = bl->brightness = brightness; + return 0; + } + if (brightness > bl->brightness_cur) step = 1; else @@ -34,10 +43,9 @@ int backlight_set_brightness(struct backlight_device *bl, int brightness) if (i == brightness) break; - udelay(100000 / num_steps); + udelay(bl->slew_time_ms * 1000 / num_steps); } - bl->brightness_cur = bl->brightness = brightness; return ret; @@ -72,6 +80,8 @@ int backlight_register(struct backlight_device *bl) dev_add_param_uint32(&bl->dev, "brightness", backlight_brightness_set, NULL, &bl->brightness, "%d", bl); + dev_add_param_uint32(&bl->dev, "slew_time_ms", NULL, NULL, + &bl->slew_time_ms, "%d", NULL); list_add_tail(&bl->list, &backlights); |