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Commit 9d6c2435 authored by Bjorn Andersson's avatar Bjorn Andersson Committed by Lee Jones
Browse files

backlight: pm8941-wled: Add default-brightness property 



Default the brightness to 2048 and add possibility to override this in
device tree.

Suggested-by: default avatarRob Clark <robdclark@gmail.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent fc18111b

Documentation/devicetree/bindings/video/backlight/pm8941-wled.txt

+2 −0
Original line number Diff line number Diff line
@@ -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

drivers/video/backlight/pm8941-wled.c

+8 −0
Original line number Diff line number Diff line
@@ -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,