diff options
| author | Sven Peter <sven@svenpeter.dev> | 2021-10-08 18:35:22 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2021-10-11 11:44:47 +0200 |
| commit | df7c4a8c1b47dc250d5525e68e785d9e65705e10 (patch) | |
| tree | 267002ccfd149b06b9fb05f4920b75b162de317e /Documentation/devicetree/bindings/i2c | |
| parent | c5c34f5793f384ed2895584c6e2350b059c3f161 (diff) | |
dt-bindings: i2c: Add Apple I2C controller bindings
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 <sven@svenpeter.dev>
Acked-by: Olof Johansson <olof@lixom.net>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/i2c')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/apple,i2c.yaml | 61 |
1 files changed, 61 insertions, 0 deletions
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>; + }; |