[PATCH] da903x_bl: control WLED output current in da9034
From: Haojian Zhuang <hidden>
Date: 2009-11-05 15:27:13
Subsystem:
dialog semiconductor drivers, multifunction devices (mfd), the rest · Maintainers:
Support Opensource, Lee Jones, Linus Torvalds
Update WLED output current source before changing brightness. Signed-off-by: Haojian Zhuang <redacted> Signed-off-by: Eric Miao <redacted> --- drivers/video/backlight/da903x_bl.c | 7 +++++++ include/linux/mfd/da903x.h | 4 ++++ 2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/video/backlight/da903x_bl.cb/drivers/video/backlight/da903x_bl.c index 701a108..9cbd01d 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(structplatform_device *pdev)
data->da903x_dev = pdev->dev.parent;
data->current_brightness = 0;
+ /* adjust the WLED output current */
+ if (pdata)
+ da903x_write(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 @@ 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;
--
1.6.3.3