From mboxrd@z Thu Jan 1 00:00:00 1970 From: huang lin Date: Thu, 26 Feb 2015 03:39:14 +0000 Subject: [PATCH 2/2] backlight: pwm: Add backlight-boot-off property Message-Id: <1424921954-8621-1-git-send-email-hl@rock-chips.com> List-Id: References: <1424920366-7626-1-git-send-email-hl@rock-chips.com> In-Reply-To: <1424920366-7626-1-git-send-email-hl@rock-chips.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: djkurtz@chromium.org Cc: thierry.reding@gmail.com, jg1.han@samsung.com, lee.jones@linaro.org, linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-rockchip@lists.infradead.org, huang lin 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 --- 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