- pwm-period: PWM period value. Set only PWM input mode used (u32)
- rom-addr: Register address of ROM area to be updated (u8)
- rom-val: Register value to be updated (u8)
+ - power-supply: Regulator which controls the 3V rail
Example:
backlight@2c {
compatible = "ti,lp8557";
reg = <0x2c>;
+ power-supply = <&backlight_vdd>;
dev-ctrl = /bits/ 8 <0x41>;
init-brt = /bits/ 8 <0x0a>;
#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
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;
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);
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;
Only valid when mode is PWM_BASED.
* @size_program : total size of lp855x_rom_data
* @rom_data : list of new eeprom/eprom registers
+ * @supply : regulator that supplies 3V input
*/
struct lp855x_platform_data {
const char *name;
unsigned int period_ns;
int size_program;
struct lp855x_rom_data *rom_data;
+ struct regulator *supply;
};
#endif