dt-bindings: i2c: convert i2c-mpc to json-schema
Convert i2c-mpc to YAML. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
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Chris Packham
Wolfram Sang
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* I2C
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Required properties :
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- reg : Offset and length of the register set for the device
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- compatible : should be "fsl,CHIP-i2c" where CHIP is the name of a
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compatible processor, e.g. mpc8313, mpc8543, mpc8544, mpc5121,
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mpc5200 or mpc5200b. For the mpc5121, an additional node
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"fsl,mpc5121-i2c-ctrl" is required as shown in the example below.
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- interrupts : <a b> where a is the interrupt number and b is a
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field that represents an encoding of the sense and level
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information for the interrupt. This should be encoded based on
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the information in section 2) depending on the type of interrupt
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controller you have.
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Recommended properties :
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- fsl,preserve-clocking : boolean; if defined, the clock settings
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from the bootloader are preserved (not touched).
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- clock-frequency : desired I2C bus clock frequency in Hz.
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- fsl,timeout : I2C bus timeout in microseconds.
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Examples :
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/* MPC5121 based board */
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i2c@1740 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mpc5121-i2c", "fsl-i2c";
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reg = <0x1740 0x20>;
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interrupts = <11 0x8>;
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interrupt-parent = <&ipic>;
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clock-frequency = <100000>;
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};
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i2ccontrol@1760 {
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compatible = "fsl,mpc5121-i2c-ctrl";
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reg = <0x1760 0x8>;
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};
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/* MPC5200B based board */
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i2c@3d00 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c";
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reg = <0x3d00 0x40>;
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interrupts = <2 15 0>;
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interrupt-parent = <&mpc5200_pic>;
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fsl,preserve-clocking;
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};
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/* MPC8544 base board */
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i2c@3100 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mpc8544-i2c", "fsl-i2c";
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reg = <0x3100 0x100>;
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interrupts = <43 2>;
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interrupt-parent = <&mpic>;
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clock-frequency = <400000>;
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fsl,timeout = <10000>;
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};
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@ -0,0 +1,91 @@
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i2c/i2c-mpc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: I2C-Bus adapter for MPC824x/83xx/85xx/86xx/512x/52xx SoCs
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maintainers:
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- Chris Packham <chris.packham@alliedtelesis.co.nz>
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allOf:
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- $ref: /schemas/i2c/i2c-controller.yaml#
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properties:
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compatible:
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oneOf:
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- items:
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- enum:
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- mpc5200-i2c
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- fsl,mpc5200-i2c
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- fsl,mpc5121-i2c
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- fsl,mpc8313-i2c
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- fsl,mpc8543-i2c
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- fsl,mpc8544-i2c
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- const: fsl-i2c
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- items:
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- const: fsl,mpc5200b-i2c
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- const: fsl,mpc5200-i2c
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- const: fsl-i2c
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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fsl,preserve-clocking:
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$ref: /schemas/types.yaml#/definitions/flag
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description: |
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if defined, the clock settings from the bootloader are
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preserved (not touched)
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fsl,timeout:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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I2C bus timeout in microseconds
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required:
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- compatible
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- reg
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- interrupts
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unevaluatedProperties: false
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examples:
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- |
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/* MPC5121 based board */
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i2c@1740 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mpc5121-i2c", "fsl-i2c";
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reg = <0x1740 0x20>;
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interrupts = <11 0x8>;
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interrupt-parent = <&ipic>;
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clock-frequency = <100000>;
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};
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/* MPC5200B based board */
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i2c@3d00 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mpc5200b-i2c", "fsl,mpc5200-i2c", "fsl-i2c";
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reg = <0x3d00 0x40>;
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interrupts = <2 15 0>;
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interrupt-parent = <&mpc5200_pic>;
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fsl,preserve-clocking;
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};
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/* MPC8544 base board */
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i2c@3100 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mpc8544-i2c", "fsl-i2c";
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reg = <0x3100 0x100>;
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interrupts = <43 2>;
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interrupt-parent = <&mpic>;
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clock-frequency = <400000>;
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fsl,timeout = <10000>;
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};
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...
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