Default the brightness to 2048 and add possibility to override this in device tree. Suggested-by: Rob Clark <robdclark@xxxxxxxxx> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx> --- Resend of v2, with updated backlight dt binding location. Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt | 2 ++ drivers/video/backlight/pm8941-wled.c | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt b/Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt index 424f8444a6cd..e5b294dafc58 100644 --- a/Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt +++ b/Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt @@ -5,6 +5,8 @@ Required properties: - reg: slave address Optional properties: +- default-brightness: brightness value on boot, value from: 0-4095 + default: 2048 - label: The name of the backlight device - qcom,cs-out: bool; enable current sink output - qcom,cabc: bool; enable content adaptive backlight control diff --git a/drivers/video/backlight/pm8941-wled.c b/drivers/video/backlight/pm8941-wled.c index c704c3236034..e1298147bcbb 100644 --- a/drivers/video/backlight/pm8941-wled.c +++ b/drivers/video/backlight/pm8941-wled.c @@ -17,6 +17,9 @@ #include <linux/of_device.h> #include <linux/regmap.h> +/* From DT binding */ +#define PM8941_WLED_DEFAULT_BRIGHTNESS 2048 + #define PM8941_WLED_REG_VAL_BASE 0x40 #define PM8941_WLED_REG_VAL_MAX 0xFFF @@ -373,6 +376,7 @@ static int pm8941_wled_probe(struct platform_device *pdev) struct backlight_device *bl; struct pm8941_wled *wled; struct regmap *regmap; + u32 val; int rc; regmap = dev_get_regmap(pdev->dev.parent, NULL); @@ -395,8 +399,12 @@ static int pm8941_wled_probe(struct platform_device *pdev) if (rc) return rc; + val = PM8941_WLED_DEFAULT_BRIGHTNESS; + of_property_read_u32(pdev->dev.of_node, "default-brightness", &val); + memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; + props.brightness = val; props.max_brightness = PM8941_WLED_REG_VAL_MAX; bl = devm_backlight_device_register(&pdev->dev, wled->name, &pdev->dev, wled, -- 2.4.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
