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backlight: da903x_bl: control WLED output current in da9034

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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>
This commit is contained in:
Haojian Zhuang
2009-11-05 10:27:13 -05:00
committed by Eric Miao
parent f64dcac0b1
commit b3a8549593
2 changed files with 11 additions and 0 deletions
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7
drivers/video/backlight/da903x_bl.c
View File

@@ -25,6 +25,7 @@
#define DA9034_WLED_CONTROL1 0x3C #define DA9034_WLED_CONTROL1 0x3C
#define DA9034_WLED_CONTROL2 0x3D #define DA9034_WLED_CONTROL2 0x3D
#define DA9034_WLED_ISET(x) ((x) & 0x1f)
#define DA9034_WLED_BOOST_EN (1 << 5) #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) static int da903x_backlight_probe(struct platform_device *pdev)
{ {
struct da9034_backlight_pdata *pdata = pdev->dev.platform_data;
struct da903x_backlight_data *data; struct da903x_backlight_data *data;
struct backlight_device *bl; struct backlight_device *bl;
int max_brightness; int max_brightness;
@@ -127,6 +129,11 @@ static int da903x_backlight_probe(struct platform_device *pdev)
data->da903x_dev = pdev->dev.parent; data->da903x_dev = pdev->dev.parent;
data->current_brightness = 0; 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, bl = backlight_device_register(pdev->name, data->da903x_dev,
data, &da903x_backlight_ops); data, &da903x_backlight_ops);
if (IS_ERR(bl)) { if (IS_ERR(bl)) {

4
include/linux/mfd/da903x.h
View File

@@ -96,6 +96,10 @@ struct da9034_touch_pdata {
int y_inverted; int y_inverted;
}; };
struct da9034_backlight_pdata {
int output_current; /* output current of WLED, from 0-31 (in mA) */
};
/* DA9030 battery charger data */ /* DA9030 battery charger data */
struct power_supply_info; struct power_supply_info;