[PATCH v2 01/11] dt-bindings: i2c: Add Apple I2C controller bindings
From: Sven Peter <hidden>
Date: 2021-10-08 16:36:30
Also in:
linux-arm-kernel, linux-devicetree, linux-i2c, lkml
Subsystem:
arm/apple machine support, i2c subsystem host drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Sven Peter, Janne Grunau, Andi Shyti, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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 <arnd@arndb.de> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Sven Peter <redacted> --- 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 <sven@svenpeter.dev> + +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
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2.25.1