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regulator: dt-bindings: rpi-panel: Split 7" Raspberry Pi 720x1280 v2 binding

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The 5" and 7" Raspberry Pi 720x1280 Display 2 MCU is a bit more
complex than the original Display 1 ATTINY88 and the binding is
also a bit more demanding. Split the binding into separate file
and fill in required gpio-controller, #gpio-cells and #pwm-cells
which must be present for the V2 MCU. Include mention of the 5"
panel in the description of Display 2, as the 5" panel uses the
same MCU.

Fixes: 6d09c6e474 ("regulator: dt-bindings: rpi-panel: Add regulator for 7" Raspberry Pi 720x1280")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Message-ID: <20250905191637.147141-1-marek.vasut+renesas@mailbox.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Marek Vasut 2025-09-05 21:16:30 +02:00 committed by Mark Brown
parent 92b9c2b7a8
commit 5bad16482c
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GPG Key ID: 24D68B725D5487D0
2 changed files with 63 additions and 5 deletions
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61
Documentation/devicetree/bindings/regulator/raspberrypi,7inch-touchscreen-panel-regulator-v2.yaml Normal file
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@ -0,0 +1,61 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/raspberrypi,7inch-touchscreen-panel-regulator-v2.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: RaspberryPi 5" and 7" display V2 MCU-based regulator/backlight controller
maintainers:
- Marek Vasut <marek.vasut+renesas@mailbox.org>
description: |
The RaspberryPi 5" and 7" display 2 has an MCU-based regulator, PWM
backlight and GPIO controller on the PCB, which is used to turn the
display unit on/off and control the backlight.
allOf:
- $ref: regulator.yaml#
properties:
compatible:
const: raspberrypi,touchscreen-panel-regulator-v2
reg:
maxItems: 1
gpio-controller: true
"#gpio-cells":
const: 2
description:
The first cell is the pin number, and the second cell is used to
specify the gpio polarity (GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW).
"#pwm-cells":
const: 3
description: See ../../pwm/pwm.yaml for description of the cell formats.
additionalProperties: false
required:
- compatible
- reg
- gpio-controller
- "#gpio-cells"
- "#pwm-cells"
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
regulator@45 {
compatible = "raspberrypi,touchscreen-panel-regulator-v2";
reg = <0x45>;
gpio-controller;
#gpio-cells = <2>;
#pwm-cells = <3>;
};
};
...

7
Documentation/devicetree/bindings/regulator/raspberrypi,7inch-touchscreen-panel-regulator.yaml
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@ -12,17 +12,14 @@ maintainers:
description: |
The RaspberryPi 7" display has an ATTINY88-based regulator/backlight
controller on the PCB, which is used to turn the display unit on/off
and control the backlight. The V2 supports 5" and 7" panels and also
offers PWM backlight control.
and control the backlight.
allOf:
- $ref: regulator.yaml#
properties:
compatible:
enum:
- raspberrypi,7inch-touchscreen-panel-regulator
- raspberrypi,touchscreen-panel-regulator-v2
const: raspberrypi,7inch-touchscreen-panel-regulator
reg:
maxItems: 1