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From 2d0958a56e6b0da1510ed86f4fb7409b43fedb4d Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 11 Feb 2021 18:46:06 +0000
Subject: [PATCH] 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>
---
 drivers/regulator/rpi-panel-attiny-regulator.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/regulator/rpi-panel-attiny-regulator.c
+++ b/drivers/regulator/rpi-panel-attiny-regulator.c
@@ -217,8 +217,7 @@ static int attiny_i2c_probe(struct i2c_c
 
 	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))