From nobody Thu Apr 2 06:27:19 2026 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 407CA303CA0; Tue, 24 Mar 2026 19:24:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774380294; cv=none; b=epXm7dV6Q4Bu267iAT6BL/qCAsNpE0sRPR0EtQJ8bL+z7WCrbHfchmHo7+bJ+pnsSv7cdn9HThGHLCtNcKTcVx5Oz1SCr3frX7k8xNsUFH/i3ZYNPh1euZ3IrggAgo2nmBQYOFKS3R9YI7E41vkYuOt6e/sTgvIIXqOkWxDHGrU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774380294; c=relaxed/simple; bh=4XZ/GuRMSAxFpp6yNg37Xy4r5DlcogaXd4BVSSY4Jtk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=lFLPwwMaVq4Zwcxswp93I/UO8HOBVUyTbdNjaWVOJljHAnV2wW2bzg/A+AbbvqCmb/tTRwOkBxwMDzJuBNcVvcjAJf0t5mEMQpRPg3YfWqn5KNYgMerCRzIn6AzRCawT2J4F0N81AqcSnJq+0LBanpih+NH5M8jPHxzpGv8d8Sg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=lpQw40np; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="lpQw40np" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id CD8854E427DB; Tue, 24 Mar 2026 19:24:51 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 996D3601A0; Tue, 24 Mar 2026 19:24:51 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 12C8710451148; Tue, 24 Mar 2026 20:24:47 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1774380290; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=Itu45DKmsPB5+bFts834kAEPp0swPEbwWn1hCj9DneM=; b=lpQw40npMMscsn3vCvyrQlBbpb1hBjZSFwux9kT66/LsRWWHqpr0XcVNMkDFOvtmwYU0zH DG1Bj2HWATvDACsRW5C46v/rayxg+TxO3sSnm3W6rhz83ywVeip3P/Wi9C6vz0HlRve+7e OvPI21CEpsCha7Ww3NzGflH5j8rpRdSJ2REPI+LQ8lqUUJCsiZ2Az8e6jo6T7SJw7TEBa5 P/uqg2Wotd0MtOBFdISQEQ3gQsmg2CiZG52QZjYWq2JYsx6bAHxaP+GWRA/gDCNoXHaWos QXu/V3+azb5tHqgnYN/Nmxj/9Q4NjpMGrmXb6cmKSQtxu5ggofQO6M1VCaaLHA== From: "Thomas Perrot (Schneider Electric)" Date: Tue, 24 Mar 2026 20:24:28 +0100 Subject: [PATCH v4 2/5] dt-bindings: mfd: Add AAEON embedded controller Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260324-dev-b4-aaeon-mcu-driver-v4-2-afb011df4794@bootlin.com> References: <20260324-dev-b4-aaeon-mcu-driver-v4-0-afb011df4794@bootlin.com> In-Reply-To: <20260324-dev-b4-aaeon-mcu-driver-v4-0-afb011df4794@bootlin.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , =?utf-8?q?J=C3=A9r=C3=A9mie_Dautheribes?= , Wim Van Sebroeck , Guenter Roeck , Lee Jones Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-watchdog@vger.kernel.org, Thomas Petazzoni , Miquel Raynal , "Thomas Perrot (Schneider Electric)" , Conor Dooley X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3300; i=thomas.perrot@bootlin.com; h=from:subject:message-id; bh=4XZ/GuRMSAxFpp6yNg37Xy4r5DlcogaXd4BVSSY4Jtk=; b=owEB7QES/pANAwAKAZ/ACwVx/grtAcsmYgBpwuT26ZHgMy+LO0/qS7k6hZDVs65qpqulluV4i uDTcAOxZauJAbMEAAEKAB0WIQSHQHfGpqMKIwOoEiGfwAsFcf4K7QUCacLk9gAKCRCfwAsFcf4K 7WyzC/9XUeZ8SfJHrvqkj2PGtah72qGoDJH+pZ4GLNJxXxml9jr7LCOXdYu6rAUoCV0iVPA4EmA u0b9z/xLmuhP97B6DFnrS93XjoIXnQIfBni51l29ZlSRShOrlqywIGoEGfAH9alSIWXNe1kWytp IPvwjEXKwJcxdUngHEW9DYQ1fhqmCQ/s3XHvkTtBWEjd83Oh/6HeLSLn+Rlbbp/ATwGyvcyeATn kdCv01uADRwL8dIWhya/47ZWUsJH8EIQ+KXeFDOPUQyknJIjYZNpGvtp/ZJEag2RF8lE9iounxI 8QKeh2rMAUfgRMMzDX+toO7zKeQO4182V67IOCDcu/39mrPqcXK7ki00RUmo8yOhsIuDh8yxpVf vtZdgS6fegAPhMpgLZsPKtKakZJyFXt3kW2806XLtm2T93PyuiNVGu+S7C80EvVE0EW3s+1Cv2V vl9jPdVLR4srKMb7Sup6uIJxJt/hO2dtiHzTSeAjyW2WDUBWYdwgxmSW+cBdCAxey45U4= X-Developer-Key: i=thomas.perrot@bootlin.com; a=openpgp; fpr=874077C6A6A30A2303A812219FC00B0571FE0AED X-Last-TLS-Session-Version: TLSv1.3 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. Reviewed-by: Conor Dooley Signed-off-by: Thomas Perrot (Schneider Electric) --- .../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..4895028e72eb3ac2376b61ed9c0= 6549b42da66d3 --- /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: + - J=C3=A9r=C3=A9mie Dautheribes + - Thomas Perrot + +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 su= pports + a timeout of 240 seconds through automatic pinging. + The timeout is not programmable and cannot be changed via device tree pr= operties. + +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 =3D <1>; + #size-cells =3D <0>; + + embedded-controller@62 { + compatible =3D "aaeon,srg-imx8p-mcu"; + reg =3D <0x62>; + + gpio-controller; + #gpio-cells =3D <2>; + gpio-line-names =3D "gpo-1", "gpo-2", "gpo-3", "gpo-4", + "gpo-5", "gpo-6", "gpo-7", + "gpio-1", "gpio-2", "gpio-3", "gpio-4", + "gpio-5", "gpio-6", "gpio-7", "gpio-8", + "gpio-9", "gpio-10", "gpio-11", "gpio-12"; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index c9e416ba74c64e90629c0b7d7941f879c9ac589e..ea9d55f76f3509c7f6ba6d1bc86= ca2e2e71aa954 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -186,6 +186,12 @@ W: http://www.adaptec.com/ F: Documentation/scsi/aacraid.rst F: drivers/scsi/aacraid/ =20 +AAEON SRG-IMX8P CONTROLLER MFD DRIVER +M: Thomas Perrot +R: J=C3=A9r=C3=A9mie Dautheribes +S: Maintained +F: Documentation/devicetree/bindings/mfd/aaeon,srg-imx8p-mcu.yaml + AAEON UPBOARD FPGA MFD DRIVER M: Thomas Richard S: Maintained --=20 2.53.0