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Fri, 24 Jul 2026 19:10:44 +0200 (CEST) From: Markus Probst Date: Fri, 24 Jul 2026 17:10:45 +0000 Subject: [PATCH v18 1/2] dt-bindings: embedded-controller: Add synology microp devices 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: 7bit Message-Id: <20260724-synology_microp_initial-v18-1-fb2f49f10e77@posteo.de> References: <20260724-synology_microp_initial-v18-0-fb2f49f10e77@posteo.de> In-Reply-To: <20260724-synology_microp_initial-v18-0-fb2f49f10e77@posteo.de> To: Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue , Lee Jones , Pavel Machek , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= Cc: platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, Markus Probst , Krzysztof Kozlowski X-Developer-Signature: v=1; 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preference=encrypt Add the Synology Microp devicetree bindings. Those devices are microcontrollers found on Synology NAS devices. They are connected to a serial port on the host device. Those devices are used to control certain LEDs, fan speeds, a beeper, to handle buttons, fan failures and to properly shutdown and reboot the device. The device has a different feature set depending on the Synology NAS model, like having different number of fans, buttons and leds. Depending on the architecture of the model, they also need a different system shutdown behaviour. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Markus Probst --- .../synology,ds918p-microp.yaml | 100 +++++++++++++++++++++ 1 file changed, 100 insertions(+) diff --git a/Documentation/devicetree/bindings/embedded-controller/synology,ds918p-microp.yaml b/Documentation/devicetree/bindings/embedded-controller/synology,ds918p-microp.yaml new file mode 100644 index 000000000000..a44101884322 --- /dev/null +++ b/Documentation/devicetree/bindings/embedded-controller/synology,ds918p-microp.yaml @@ -0,0 +1,100 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/embedded-controller/synology,ds918p-microp.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Synology NAS on-board Microcontroller + +maintainers: + - Markus Probst + +description: | + Synology Microp is a microcontroller found in Synology NAS devices. + It is connected to a serial port on the host device. + + It is necessary to properly shutdown and reboot the NAS device and + provides additional functionality such as led control, fan speed control, + a beeper and buttons on the NAS device. + +properties: + compatible: + oneOf: + - items: + - enum: + - synology,rs1221rpp-microp + - synology,rs822p-microp + - synology,rs422p-microp + - const: synology,rs1221p-microp + + - items: + - const: synology,ds1825p-microp + - const: synology,ds1823xsp-microp + + - items: + - enum: + - synology,ds725p-microp + - synology,ds225p-microp + - synology,ds723p-microp + - synology,ds710p-microp + - const: synology,ds214play-microp + + - items: + - enum: + - synology,ds425p-microp + - synology,ds1525p-microp + - synology,ds925p-microp + - synology,ds923p-microp + - synology,ds1522p-microp + - synology,ds1010p-microp + - synology,ds411p-microp + - const: synology,ds918p-microp + + - items: + - enum: + - synology,ds124-microp + - synology,ds223j-microp + - synology,ds223-microp + - const: synology,ds118-microp + + - enum: + - synology,ds118-microp + - synology,ds1823xsp-microp + - synology,rs1221p-microp + - synology,ds918p-microp + - synology,ds214play-microp + + fan-failure-gpios: + description: GPIOs needed to determine which fans stopped working on a fan failure event. + minItems: 2 + maxItems: 3 + +required: + - compatible + +allOf: + - if: + properties: + compatible: + contains: + enum: + - synology,ds918p-microp + - synology,rs422p-microp + then: + required: + - fan-failure-gpios + else: + properties: + fan-failure-gpios: false + +additionalProperties: false + +examples: + - | + #include + + embedded-controller { + compatible = "synology,ds923p-microp", "synology,ds918p-microp"; + + fan-failure-gpios = <&gpio 68 GPIO_ACTIVE_HIGH>, <&gpio 69 GPIO_ACTIVE_HIGH>; + }; -- 2.54.0