>> + if (backlight_is_blank(bl) || (bl->props.brightness < 0x4)) > You could replace bl->props.brightness with backlight_get_brightness(bl) > to avoid direct access to the properties. Thanks. Changed in v2. >> + /* turn the string off */ >> ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0); >> else >> ret |= lm3630a_update(pchip, REG_CTRL, >> @@ -277,7 +279,9 @@ static int lm3630a_bank_b_update_status(struct backlight_device *bl) >> usleep_range(1000, 2000); >> /* minimum brightness is 0x04 */ >> ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness); >> - if (bl->props.brightness < 0x4) >> + >> + if (backlight_is_blank(bl) || (bl->props.brightness < 0x4)) Thanks. Changed in v2.