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>
diff --git a/drivers/video/backlight/pm8941-wled.c b/drivers/video/backlight/pm8941-wled.c
index 78bba87..0b6d219 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 @@
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 @@
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,