linux-kernel - Re: [PATCH v3 2/5] dt-bindings: mfd: Add AAEON embedded controller

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Message-ID: <20260204-feminize-agility-60c8463b849f@spud>
Date: Wed, 4 Feb 2026 18:11:44 +0000
From: Conor Dooley <conor@...nel.org>
To: "Thomas Perrot (Schneider Electric)" <thomas.perrot@...tlin.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Linus Walleij <linusw@...nel.org>,
	Bartosz Golaszewski <brgl@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Jérémie Dautheribes <jeremie.dautheribes@...tlin.com>,
	Wim Van Sebroeck <wim@...ux-watchdog.org>,
	Guenter Roeck <linux@...ck-us.net>, Lee Jones <lee@...nel.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-watchdog@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v3 2/5] dt-bindings: mfd: Add AAEON embedded controller

On Tue, Feb 03, 2026 at 05:21:11PM +0100, Thomas Perrot (Schneider Electric) wrote:
> Add device tree binding documentation for the AAEON embedded controller
> (MCU). This microcontroller is found on AAEON embedded boards, it is
> connected via I2C and  and provides a GPIO control and watchdog timer.
> 
> Signed-off-by: Thomas Perrot (Schneider Electric) <thomas.perrot@...tlin.com>
> ---
>  .../bindings/mfd/aaeon,srg-imx8p-mcu.yaml          | 67 ++++++++++++++++++++++
>  MAINTAINERS                                        |  6 ++
>  2 files changed, 73 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/aaeon,srg-imx8p-mcu.yaml b/Documentation/devicetree/bindings/mfd/aaeon,srg-imx8p-mcu.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..9d109fb0d53cb2a859f5a908a35611394eb87807
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/aaeon,srg-imx8p-mcu.yaml
> @@ -0,0 +1,67 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/aaeon,srg-imx8p-mcu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AAEON Embedded Controller
> +
> +maintainers:
> +  - Jérémie Dautheribes <jeremie.dautheribes@...tlin.com>
> +  - Thomas Perrot <thomas.perrot@...tlin.com>
> +
> +description:
> +  AAEON embeds a microcontroller on Standard RISC Gateway with ARM i.MX8M Plus
> +  Quad-Core boards providing GPIO control and watchdog timer.
> +
> +  This MCU is connected via I2C bus.
> +
> +  Its GPIO controller provides 7 GPOs and 12 GPIOs.
> +
> +  Its watchdog has a fixed maximum hardware heartbeat of 25 seconds and supports
> +  a timeout of 240 seconds through automatic pinging.
> +  The timeout is not programmable and cannot be changed via device tree properties.
> +
> +properties:
> +  compatible:
> +    const: aaeon,srg-imx8p-mcu
> +
> +  reg:
> +    maxItems: 1
> +
> +  gpio-controller: true
> +
> +  "#gpio-cells":
> +    const: 2
> +
> +  gpio-line-names:
> +    minItems: 1
> +    maxItems: 19
> +
> +required:
> +  - compatible
> +  - reg
> +  - gpio-controller
> +  - "#gpio-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      aaeon_mcu: embedded-controller@62 {

Drop the label here if you respin,
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
pw-bot: not-applicable

Cheers,
Conor.

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