On Mon, Oct 26, 2015 at 12:45 PM, Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx> wrote: > 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. Acked-by: Rob Herring <robh@xxxxxxxxxx> > > 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
