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Fri, 6 Mar 2026 20:38:27 +0100 (CET) From: Markus Probst Date: Fri, 06 Mar 2026 19:38:28 +0000 Subject: [PATCH 1/2] dt-bindings: mfd: Add binding for 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: quoted-printable Message-Id: <20260306-synology_microp_initial-v1-1-fcffede6448c@posteo.de> References: <20260306-synology_microp_initial-v1-0-fcffede6448c@posteo.de> In-Reply-To: <20260306-synology_microp_initial-v1-0-fcffede6448c@posteo.de> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev, rust-for-linux@vger.kernel.org, Markus Probst 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. Signed-off-by: Markus Probst --- .../devicetree/bindings/mfd/synology,microp.yaml | 75 ++++++++++++++++++= ++++ 1 file changed, 75 insertions(+) diff --git a/Documentation/devicetree/bindings/mfd/synology,microp.yaml b/D= ocumentation/devicetree/bindings/mfd/synology,microp.yaml new file mode 100644 index 000000000000..0fcb0b750bf0 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/synology,microp.yaml @@ -0,0 +1,75 @@ +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/synology,microp.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Synology NAS on-board Microcontroller + +maintainers: + - Markus Probst + +description: | + Synology devices contain a microcontroller on their device to control + certain leds, fan speeds, a beeper, to properly handle system shutdown + and reboot, buttons and fan failures. + +properties: + compatible: + enum: + - synology,microp + power-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + status-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + alert-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + usb-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + no-check-fan: + type: boolean + description: | + Disable fan failure check. + + The fan failure event is triggered on the device, even if the fan + has been intentionally set to a low speed. This property prevents a + hardware protection shutdown if a fan failure event is reported. + no-check-cpu-fan: + type: boolean + description: | + Disable cpu fan failure check. + + The cpu fan failure event is triggered on the device, even if the cpu + fan has been intentionally set to a low speed. This property prevents + a hardware protection shutdown if a cpu fan failure event is + reported. + +required: + - compatible + - power-led + - status-led + +additionalProperties: false + +examples: + - | + #include + + uart { + microp { + compatible =3D "synology,microp"; + + power-led { + color =3D ; + function =3D LED_FUNCTION_POWER; + }; + + status-led { + color =3D ; + function =3D LED_FUNCTION_STATUS; + }; + }; + }; --=20 2.52.0