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Fri, 8 Oct 2021 12:36:13 -0400 (EDT) From: Sven Peter To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Olof Johansson , Christian Zigotzky , Wolfram Sang , Rob Herring Cc: Sven Peter , Arnd Bergmann , Hector Martin , Mohamed Mediouni , Stan Skowronek , Mark Kettenis , Alyssa Rosenzweig , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring Subject: [PATCH v2 01/11] dt-bindings: i2c: Add Apple I2C controller bindings Date: Fri, 8 Oct 2021 18:35:22 +0200 Message-Id: <20211008163532.75569-2-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20211008163532.75569-1-sven@svenpeter.dev> References: <20211008163532.75569-1-sven@svenpeter.dev> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211008_093620_160625_4DF49113 X-CRM114-Status: GOOD ( 15.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Apple I2C controller is based on the PASemi I2C controller. It is present on Apple SoCs such as the M1. Reviewed-by: Arnd Bergmann Reviewed-by: Rob Herring Signed-off-by: Sven Peter --- v1 -> v2: no changes .../devicetree/bindings/i2c/apple,i2c.yaml | 61 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/apple,i2c.yaml diff --git a/Documentation/devicetree/bindings/i2c/apple,i2c.yaml b/Documentation/devicetree/bindings/i2c/apple,i2c.yaml new file mode 100644 index 000000000000..22fc8483256f --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/apple,i2c.yaml @@ -0,0 +1,61 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/i2c/apple,i2c.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Apple/PASemi I2C controller + +maintainers: + - Sven Peter + +description: | + Apple SoCs such as the M1 come with a I2C controller based on the one found + in machines with P. A. Semi's PWRficient processors. + The bus is used to communicate with e.g. USB PD chips or the speaker + amp. + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +properties: + compatible: + enum: + - apple,t8103-i2c + - apple,i2c + + reg: + maxItems: 1 + + clocks: + items: + - description: I2C bus reference clock + + interrupts: + maxItems: 1 + + clock-frequency: + description: | + Desired I2C bus clock frequency in Hz. If not specified, 100 kHz will be + used. This frequency is generated by dividing the reference clock. + Allowed values are between ref_clk/(16*4) and ref_clk/(16*255). + +required: + - compatible + - reg + - clocks + - interrupts + +unevaluatedProperties: false + +examples: + - | + i2c@35010000 { + compatible = "apple,t8103-i2c"; + reg = <0x35010000 0x4000>; + interrupt-parent = <&aic>; + interrupts = <0 627 4>; + clocks = <&ref_clk>; + #address-cells = <1>; + #size-cells = <0>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 7cfd63ce7122..74aa85967ca3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1735,6 +1735,7 @@ B: https://github.com/AsahiLinux/linux/issues C: irc://irc.oftc.net/asahi-dev T: git https://github.com/AsahiLinux/linux.git F: Documentation/devicetree/bindings/arm/apple.yaml +F: Documentation/devicetree/bindings/i2c/apple,i2c.yaml F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml F: Documentation/devicetree/bindings/pci/apple,pcie.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml