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| author | Haojian Zhuang <haojian.zhuang@marvell.com> | 2009-11-05 16:27:13 +0100 |
|---|---|---|
| committer | Eric Miao <eric.y.miao@gmail.com> | 2009-12-01 02:02:34 +0100 |
| commit | b3a8549593696f5f3efcdbf280e2c8e0fe894855 (patch) | |
| tree | ce031f9fbf7d2b23aa6e3c513764f015ab505230 | |
| parent | backlight: tdo24m: ensure chip select changes between transfers (diff) | |
| download | linux-b3a8549593696f5f3efcdbf280e2c8e0fe894855.tar.xz linux-b3a8549593696f5f3efcdbf280e2c8e0fe894855.zip | |
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>
| -rw-r--r-- | drivers/video/backlight/da903x_bl.c | 7 | ||||
| -rw-r--r-- | include/linux/mfd/da903x.h | 4 |
2 files changed, 11 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)) { diff --git a/include/linux/mfd/da903x.h b/include/linux/mfd/da903x.h index c63b65c94429..0aa3a1a49ee3 100644 --- a/include/linux/mfd/da903x.h +++ b/include/linux/mfd/da903x.h @@ -96,6 +96,10 @@ struct da9034_touch_pdata { 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; |