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SubjectRe: [PATCH] backlight: pm8941-wled: Add default-brightness property
On Thu, 23 Jul 2015, Bjorn Andersson wrote:

> Add the possibility of specifying the default brightness in DT.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
> ---
>
> This depends on the patch moving pm8941-wled to backlight [1]. The dt property
> is used by several other backlight drivers, so I considered this to be a
> "common" property and it's hence not prefixed with "qcom,".
>
> [1] https://lkml.org/lkml/2015/7/21/906
>
> Documentation/devicetree/bindings/video/backlight/pm8941-wled.txt | 1 +

This needs to be in a seperate patch.

> drivers/video/backlight/pm8941-wled.c | 4 ++++

You can't send patches on top of non-existent drivers.

> 2 files changed, 5 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/video/backlight/pm8941-wled.txt b/Documentation/devicetree/bindings/video/backlight/pm8941-wled.txt
> index 424f8444a6cd..37503f8c3620 100644
> --- a/Documentation/devicetree/bindings/video/backlight/pm8941-wled.txt
> +++ b/Documentation/devicetree/bindings/video/backlight/pm8941-wled.txt
> @@ -5,6 +5,7 @@ Required properties:
> - reg: slave address
>
> Optional properties:
> +- default-brightness: value from: 0-4095
> - 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..b875e58df0fc 100644
> --- a/drivers/video/backlight/pm8941-wled.c
> +++ b/drivers/video/backlight/pm8941-wled.c
> @@ -373,6 +373,7 @@ static int pm8941_wled_probe(struct platform_device *pdev)
> struct backlight_device *bl;
> struct pm8941_wled *wled;
> struct regmap *regmap;
> + u32 val = 0;
> int rc;
>
> regmap = dev_get_regmap(pdev->dev.parent, NULL);
> @@ -395,8 +396,11 @@ static int pm8941_wled_probe(struct platform_device *pdev)
> if (rc)
> return rc;
>
> + 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,

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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