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{ "id": 2219655, "url": "http://patchwork.ozlabs.org/api/1.0/covers/2219655/?format=api", "project": { "id": 35, "url": "http://patchwork.ozlabs.org/api/1.0/projects/35/?format=api", "name": "Linux I2C development", "link_name": "linux-i2c", "list_id": "linux-i2c.vger.kernel.org", "list_email": "linux-i2c@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260403-add-mcu-fan-khadas-vim4-v2-0-70536b22439a@aliel.fr>", "date": "2026-04-03T16:08:33", "name": "[v2,0/8] Add VIM4 MCU/FAN support", "submitter": { "id": 93040, "url": "http://patchwork.ozlabs.org/api/1.0/people/93040/?format=api", "name": "Ronald Claveau", "email": "linux-kernel-dev@aliel.fr" }, "series": [ { "id": 498653, "url": "http://patchwork.ozlabs.org/api/1.0/series/498653/?format=api", "date": "2026-04-03T16:08:34", "name": "Add VIM4 MCU/FAN support", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/498653/mbox/" } ], "headers": { "Return-Path": "\n <linux-i2c+bounces-16948-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-i2c@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n secure) header.d=aliel.fr header.i=@aliel.fr header.a=rsa-sha256\n header.s=courrier-s1 header.b=gxQfOAYx;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=aliel.fr;\n spf=pass smtp.mailfrom=aliel.fr;\n dkim=pass (1024-bit key) header.d=aliel.fr header.i=@aliel.fr\n header.b=gxQfOAYx; arc=none smtp.client-ip=65.21.61.41", "From": "Ronald Claveau <linux-kernel-dev@aliel.fr>", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=aliel.fr;\n\ts=courrier-s1; t=1775232554;\n\tbh=b+FuEJoaX/LLvdfaT0daRsas8iidLBkE2+x2VRnGD5s=;\n\th=From:Subject:Date:To:Cc;\n\tb=gxQfOAYxt86hCKGMIRjOk6wkUnCbT8ZalxEomn5UO8PqLyUOqY26faz0Aw7H4DJGT\n\t RMIyBzIj+xQp09LZATgAEOmd5Om5EU5yza5X/CKZ4ZIKPaMarfeYgXIaBB5kFQlQT2\n\t XH02t6R6ubd8y7HRH/qfwCiZ8wI9nlsrJvr9QyRI=", "Subject": "[PATCH v2 0/8] Add VIM4 MCU/FAN support", "Date": "Fri, 03 Apr 2026 18:08:33 +0200", "Message-Id": "<20260403-add-mcu-fan-khadas-vim4-v2-0-70536b22439a@aliel.fr>", "Precedence": "bulk", "X-Mailing-List": "linux-i2c@vger.kernel.org", "List-Id": "<linux-i2c.vger.kernel.org>", "List-Subscribe": "<mailto:linux-i2c+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-i2c+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "8bit", "X-B4-Tracking": "v=1; b=H4sIAAAAAAAC/4VSy27bMBD8FUPn0uCbolAU+Y8gh13uMmarhyvJQ\n oLA/x5a8aFGC/Q4S8wMd2Y/moXnwkvTHT6ambeylGmsQH87NOkE4yuLQhU3WmovrdQCiMSQLiL\n DKH6dgGARWxmsgKQSsnMmRWwq+zxzLm+78vPLF57596UarF/DBmFhkaZhKGt3GPltFbuJ0eHGH\n 3hZYLfvDt/vD15G7a07KukqUEKJnwXG4+nyBEM/vZZ0rHI/dndY02nnegeOgs+ZsP7MAKAxrUP\n 0LqHUQUqbjOTAjyxtgvaxlarVnsgAhYzKM1oK5MkyoJNWh/aR5QJHlC1E3wJTdtaQIUnOp6wSW\n EItUYPyzZ/pVrP7dnu2mAZrgtO3ZKpywZ4F163B5hCDgW7Tj6YYjMyOrUZW1EZS0bA3UDWdjS4\n RZp0CBfynqZGitiTKuEFfSJzn6czz+i6wVmkpGpODujv+zVU7t0Yv1iDGS9+LmReuNaKXLWOOB\n LbbVHOr/1SWdZrf9zuro1v//z2pTQlZxZSuuUMKKJ/qJ7k/5rl5uV6vn75hzAK8AgAA", "X-Change-ID": "20260402-add-mcu-fan-khadas-vim4-ac1cbe553c9b", "To": "Neil Armstrong <neil.armstrong@linaro.org>, Lee Jones <lee@kernel.org>,\n Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>,\n Conor Dooley <conor+dt@kernel.org>, Andi Shyti <andi.shyti@kernel.org>,\n Kevin Hilman <khilman@baylibre.com>, Jerome Brunet <jbrunet@baylibre.com>,\n Martin Blumenstingl <martin.blumenstingl@googlemail.com>,\n Beniamino Galvani <b.galvani@gmail.com>,\n \"Rafael J. Wysocki\" <rafael@kernel.org>,\n Daniel Lezcano <daniel.lezcano@kernel.org>, Zhang Rui <rui.zhang@intel.com>,\n Lukasz Luba <lukasz.luba@arm.com>, Liam Girdwood <lgirdwood@gmail.com>,\n Mark Brown <broonie@kernel.org>", "Cc": "linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org,\n linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,\n linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org,\n Ronald Claveau <linux-kernel-dev@aliel.fr>", "X-Mailer": "b4 0.14.3", "X-Developer-Signature": "v=1; a=openssh-sha256; t=1775232551; l=4062;\n i=linux-kernel-dev@aliel.fr; s=id_ed25519; h=from:subject:message-id;\n bh=b+FuEJoaX/LLvdfaT0daRsas8iidLBkE2+x2VRnGD5s=;\n b=U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgMGec55oxeeisqykQiUedekMYyOnR9\n BG9E/7rDWyqdNoAAAAGcGF0YXR0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5AAAA\n QKbwxc2nyvaM/g7EJtMQkRcMXE0rrg9I/DCURkIsgkXgdt9W/vAsvqLW+rLYKdzSxqlUtsOHofg\n R2wPjYnX0QgM=", "X-Developer-Key": "i=linux-kernel-dev@aliel.fr; a=openssh;\n fpr=SHA256:kch4osYZ6A1BrPps5AUs6KnfdE2wm4ocMtyTc8TmZMs" }, "content": "The Khadas VIM4 board features a different MCU variant compared to\nprevious VIM boards.\nWhile it shares the same I2C-based communication model,\nit differs in some ways:\n\n - A distinct register map with its own volatile/writeable register set\n - A fan control with 0–100 levels instead of the 0–3 levels previously\n - A fan power supply gated through a regulator\n\nThis series adds support for this new variant by:\n\n 1. Refactoring the khadas-mcu MFD driver to use per-variant data\n structures (regmap config, cells, fan platform data),\n and adding the khadas,vim4-mcu compatible string.\n\n 2. Extending the fan thermal driver to retrieve the fan register\n and maximum level from platform_data,\n and to optionally manage a power regulator for the fan supply.\n\n 3. Adding the corresponding DTS node for the VIM4, wiring the MCU to\n the I2C AO_A bus and exposing it as a thermal cooling device.\n\nSigned-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>\n---\nChanges in v2:\n- PATCH 5: Add regulator_disable on suspend thanks to Neil's feedback.\n- Link to v1: https://lore.kernel.org/r/20260402-add-mcu-fan-khadas-vim4-v1-0-2b12eb4ac7b0@aliel.fr\n\n---\nRonald Claveau (8):\n dt-bindings: mfd: khadas: Add new compatible for Khadas VIM4 MCU\n dt-bindings: i2c: amlogic: Add compatible for T7 SOC\n mfd: khadas-mcu: Add per-variant configuration infrastructure and VIM4 support\n mfd: khadas-mcu: Add support for VIM4 MCU variant\n thermal: khadas-mcu-fan: Add fan config from platform data Add regulator support\n arm64: dts: amlogic: t7: Add i2c pinctrl node\n arm64: dts: amlogic: t7: Add i2c controller node\n arm64: dts: amlogic: t7: khadas-vim4: Add i2c MCU fan node\n\n .../bindings/i2c/amlogic,meson6-i2c.yaml | 13 ++-\n .../devicetree/bindings/mfd/khadas,mcu.yaml | 5 +\n .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts | 13 +++\n arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 20 ++++\n drivers/mfd/khadas-mcu.c | 106 ++++++++++++++++++---\n drivers/thermal/khadas_mcu_fan.c | 49 ++++++++--\n include/linux/mfd/khadas-mcu.h | 39 +++++++-\n 7 files changed, 222 insertions(+), 23 deletions(-)\n---\nbase-commit: f7b64ed948718290209074a50bb0df17e5944873\nchange-id: 20260402-add-mcu-fan-khadas-vim4-ac1cbe553c9b\nprerequisite-message-id: <20260326092645.1053261-1-jian.hu@amlogic.com>\nprerequisite-patch-id: f03a086b4137158412b2d47b3de793b858de8dde\nprerequisite-patch-id: 123970c9b29c2090440f2fd71c85d3c6fd8e36de\nprerequisite-patch-id: 3e2e56b0926ba327b520f935df4ced5089bbe503\nprerequisite-patch-id: 65a5d76ffdbc9b3aab3385bb65cb027004c30e7e\nprerequisite-patch-id: 237269801826dd3ad7fb16eb4d7d6d4eab504278\nprerequisite-patch-id: 57e9b08a968aedf543d3d0d56cf1ca4db20b2a16\nprerequisite-change-id: 20260326-add-bcm43752-compatible-e264a4f7973a:v2\nprerequisite-patch-id: cd98b74fa56af72af2553f391c400981d83cd4f4\nprerequisite-patch-id: b730f5e42be1d89d193e63a0265495cdbf2c7d7b\nprerequisite-change-id: 20260330-fix-invalid-property-bbe54d933f71:v2\nprerequisite-patch-id: 8d675e7a239985c762843515b241f0a2f45f9c92\nprerequisite-change-id: 20260331-fix-aml-t7-null-reset-2b608ebf9da4:v1\nprerequisite-patch-id: 5b5de77af11747ce964404fb827d2ee2bff47ea5\nprerequisite-patch-id: 1e37fc75fed1e533adee0f3e7e6ead1f8ff3c55c\nprerequisite-patch-id: 65a5d76ffdbc9b3aab3385bb65cb027004c30e7e\nprerequisite-patch-id: 2daf583fb5e7449a02bd217d8aca330171b598aa\nprerequisite-patch-id: 237269801826dd3ad7fb16eb4d7d6d4eab504278\nprerequisite-patch-id: d1ddf9b7710e91f8062de83bd7ba55afb2c4c112\nprerequisite-patch-id: 57e9b08a968aedf543d3d0d56cf1ca4db20b2a16\nprerequisite-patch-id: cd98b74fa56af72af2553f391c400981d83cd4f4\nprerequisite-patch-id: b730f5e42be1d89d193e63a0265495cdbf2c7d7b\nprerequisite-patch-id: 9debd88fa60febed9cd7208f86603b4c2d270520\nprerequisite-patch-id: 314ef9ff0c4d1d15dab1dea9d92aa065f1eac3e9\n\nBest regards," }