A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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backlight: lp855x: Add supply regulator to lp855x

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This patch adds a supply regulator to the lp855x platform data to facilitate
powering on/off the 3V rail attached to the controller.

Cc: Stéphane Marchesin <[email protected]>
Cc: Aaron Durbin <[email protected]>
Signed-off-by: Sean Paul <[email protected]>
Acked-by: Milo Kim <[email protected]>
Acked-by: Bryan Wu <[email protected]>
Acked-by: Jingoo Han <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
This commit is contained in:
Sean Paul 2014-12-02 17:39:12 -08:00 • committed by Lee Jones
commit 829b030e58
3 changed files with 22 additions and 0 deletions
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18
drivers/video/backlight/lp855x_bl.c
View file

@ -17,6 +17,7 @@
#include <linux/of.h>
#include <linux/platform_data/lp855x.h>
#include <linux/pwm.h>
#include <linux/regulator/consumer.h>
/* LP8550/1/2/3/6 Registers */
#define LP855X_BRIGHTNESS_CTRL 0x00
@ -383,6 +384,13 @@ static int lp855x_parse_dt(struct lp855x *lp)
pdata->rom_data = &rom[0];
}
pdata->supply = devm_regulator_get(dev, "power");
if (IS_ERR(pdata->supply)) {
if (PTR_ERR(pdata->supply) == -EPROBE_DEFER)
return -EPROBE_DEFER;
pdata->supply = NULL;
}
lp->pdata = pdata;
return 0;
@ -423,6 +431,14 @@ static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
else
lp->mode = REGISTER_BASED;
if (lp->pdata->supply) {
ret = regulator_enable(lp->pdata->supply);
if (ret < 0) {
dev_err(&cl->dev, "failed to enable supply: %d\n", ret);
return ret;
}
}
i2c_set_clientdata(cl, lp);
ret = lp855x_configure(lp);
@ -454,6 +470,8 @@ static int lp855x_remove(struct i2c_client *cl)
lp->bl->props.brightness = 0;
backlight_update_status(lp->bl);
if (lp->pdata->supply)
regulator_disable(lp->pdata->supply);
sysfs_remove_group(&lp->dev->kobj, &lp855x_attr_group);
return 0;