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authorHaojian Zhuang <haojian.zhuang@marvell.com>2009-11-05 10:27:13 -0500
committerEric Miao <eric.y.miao@gmail.com>2009-12-01 09:02:34 +0800
commitb3a8549593696f5f3efcdbf280e2c8e0fe894855 (patch)
treece031f9fbf7d2b23aa6e3c513764f015ab505230 /drivers/video/backlight
parentf64dcac0b1247842db2530959cbe3df1cb1947c4 (diff)
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>
Diffstat (limited to 'drivers/video/backlight')
-rw-r--r--drivers/video/backlight/da903x_bl.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c
index 701a1081e199..7fcb0eb54c60 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 struct backlight_ops da903x_backlight_ops = {
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 @@ static int da903x_backlight_probe(struct platform_device *pdev)
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)) {