backlight: pm8941-wled: Add default-brightness property
Default the brightness to 2048 and add possibility to override this in device tree. Suggested-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Коммит
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@ -5,6 +5,8 @@ Required properties:
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- reg: slave address
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Optional properties:
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- default-brightness: brightness value on boot, value from: 0-4095
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default: 2048
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- label: The name of the backlight device
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- qcom,cs-out: bool; enable current sink output
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- qcom,cabc: bool; enable content adaptive backlight control
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@ -17,6 +17,9 @@
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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/* From DT binding */
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#define PM8941_WLED_DEFAULT_BRIGHTNESS 2048
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#define PM8941_WLED_REG_VAL_BASE 0x40
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#define PM8941_WLED_REG_VAL_MAX 0xFFF
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@ -373,6 +376,7 @@ static int pm8941_wled_probe(struct platform_device *pdev)
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struct backlight_device *bl;
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struct pm8941_wled *wled;
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struct regmap *regmap;
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u32 val;
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int rc;
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regmap = dev_get_regmap(pdev->dev.parent, NULL);
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@ -395,8 +399,12 @@ static int pm8941_wled_probe(struct platform_device *pdev)
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if (rc)
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return rc;
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val = PM8941_WLED_DEFAULT_BRIGHTNESS;
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of_property_read_u32(pdev->dev.of_node, "default-brightness", &val);
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memset(&props, 0, sizeof(struct backlight_properties));
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props.type = BACKLIGHT_RAW;
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props.brightness = val;
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props.max_brightness = PM8941_WLED_REG_VAL_MAX;
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bl = devm_backlight_device_register(&pdev->dev, wled->name,
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&pdev->dev, wled,
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