[PATCH 2/2] backlight: pwm: Add backlight-boot-off property

[huang lin <hl@rock-chips.com>]

Add backlight-boot-off property, so we can keeping the
backlight disabled at boot until it is enabled implicitly
by a panel driver, or explicitly by userspace

Signed-off-by: huang lin <hl@rock-chips.com>

---

 drivers/video/backlight/pwm_bl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 3a145a6..dece351 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -319,6 +319,10 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	}
 
 	bl->props.brightness = data->dft_brightness;
+
+	if (of_find_property(pdev->dev.of_node, "backlight-boot-off", NULL))
+		bl->props.power = FB_BLANK_POWERDOWN;
+
 	backlight_update_status(bl);
 
 	platform_set_drvdata(pdev, bl);
-- 
1.9.1