regulator: rpi-panel: Register with a unique backlight name

There's no reason why 2 Raspberry Pi DSI displays can't be
attached to a Pi Compute Module, so the backlight names need to
be unique.

Use the parent dev_name. It's not as readable, but is unique.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

diff --git a/drivers/regulator/rpi-panel-attiny-regulator.c b/drivers/regulator/rpi-panel-attiny-regulator.c
index ee46bfb..370b9ae 100644 (file)
--- a/drivers/regulator/rpi-panel-attiny-regulator.c
+++ b/drivers/regulator/rpi-panel-attiny-regulator.c
@@ -181,8 +181,7 @@ static int attiny_i2c_probe(struct i2c_client *i2c,
 
        props.type = BACKLIGHT_RAW;
        props.max_brightness = 0xff;
-       bl = devm_backlight_device_register(&i2c->dev,
-                                           "7inch-touchscreen-panel-bl",
+       bl = devm_backlight_device_register(&i2c->dev, dev_name(&i2c->dev),
                                            &i2c->dev, regmap, &attiny_bl,
                                            &props);
        if (IS_ERR(bl))