backlight: da903x_bl: control WLED output current in da9034
Update WLED output current source before changing brightness.
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c
index 701a108..7fcb0eb 100644
--- a/drivers/video/backlight/da903x_bl.c
+++ b/drivers/video/backlight/da903x_bl.c
@@ -25,6 +25,7 @@
#define DA9034_WLED_CONTROL1 0x3C
#define DA9034_WLED_CONTROL2 0x3D
+#define DA9034_WLED_ISET(x) ((x) & 0x1f)
#define DA9034_WLED_BOOST_EN (1 << 5)
@@ -101,6 +102,7 @@
static int da903x_backlight_probe(struct platform_device *pdev)
{
+ struct da9034_backlight_pdata *pdata = pdev->dev.platform_data;
struct da903x_backlight_data *data;
struct backlight_device *bl;
int max_brightness;
@@ -127,6 +129,11 @@
data->da903x_dev = pdev->dev.parent;
data->current_brightness = 0;
+ /* adjust the WLED output current */
+ if (pdata)
+ da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2,
+ DA9034_WLED_ISET(pdata->output_current));
+
bl = backlight_device_register(pdev->name, data->da903x_dev,
data, &da903x_backlight_ops);
if (IS_ERR(bl)) {
diff --git a/include/linux/mfd/da903x.h b/include/linux/mfd/da903x.h
index c63b65c..0aa3a1a 100644
--- a/include/linux/mfd/da903x.h
+++ b/include/linux/mfd/da903x.h
@@ -96,6 +96,10 @@
int y_inverted;
};
+struct da9034_backlight_pdata {
+ int output_current; /* output current of WLED, from 0-31 (in mA) */
+};
+
/* DA9030 battery charger data */
struct power_supply_info;
