dt-bindings: i2c: i2c-mux-pca954x: Convert to DT schema
Convert the i2c-mux-pca954x binding to DT schema format. Add the missing compatible for 'nxp,pca9645' which is already in use. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Wolfram Sang <wsa@kernel.org> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20210526184839.2937899-6-robh@kernel.org
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Rob Herring
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2 changed files with 110 additions and 74 deletions
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* NXP PCA954x I2C bus switch
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The driver supports NXP PCA954x and PCA984x I2C mux/switch devices.
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Required Properties:
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- compatible: Must contain one of the following.
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"nxp,pca9540",
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"nxp,pca9542",
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"nxp,pca9543",
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"nxp,pca9544",
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"nxp,pca9545",
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"nxp,pca9546", "nxp,pca9846",
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"nxp,pca9547", "nxp,pca9847",
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"nxp,pca9548", "nxp,pca9848",
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"nxp,pca9849"
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- reg: The I2C address of the device.
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The following required properties are defined externally:
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- Standard I2C mux properties. See i2c-mux.txt in this directory.
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- I2C child bus nodes. See i2c-mux.txt in this directory.
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Optional Properties:
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- reset-gpios: Reference to the GPIO connected to the reset input.
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- idle-state: if present, overrides i2c-mux-idle-disconnect,
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Please refer to Documentation/devicetree/bindings/mux/mux-controller.yaml
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- i2c-mux-idle-disconnect: Boolean; if defined, forces mux to disconnect all
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children in idle state. This is necessary for example, if there are several
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multiplexers on the bus and the devices behind them use same I2C addresses.
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- interrupts: Interrupt mapping for IRQ.
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- interrupt-controller: Marks the device node as an interrupt controller.
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- #interrupt-cells : Should be two.
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- first cell is the pin number
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- second cell is used to specify flags.
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See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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Example:
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i2c-switch@74 {
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compatible = "nxp,pca9548";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x74>;
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interrupt-parent = <&ipic>;
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interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
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interrupt-controller;
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#interrupt-cells = <2>;
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i2c@2 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <2>;
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eeprom@54 {
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compatible = "atmel,24c08";
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reg = <0x54>;
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};
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};
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i2c@4 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <4>;
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rtc@51 {
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compatible = "nxp,pcf8563";
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reg = <0x51>;
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};
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};
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};
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110
Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
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110
Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i2c/i2c-mux-pca954x.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: NXP PCA954x I2C bus switch
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maintainers:
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- Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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description:
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The binding supports NXP PCA954x and PCA984x I2C mux/switch devices.
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allOf:
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- $ref: /schemas/i2c/i2c-mux.yaml#
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properties:
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compatible:
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oneOf:
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- enum:
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- nxp,pca9540
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- nxp,pca9542
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- nxp,pca9543
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- nxp,pca9544
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- nxp,pca9545
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- nxp,pca9546
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- nxp,pca9547
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- nxp,pca9548
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- nxp,pca9846
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- nxp,pca9847
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- nxp,pca9848
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- nxp,pca9849
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- items:
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- const: nxp,pca9646
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- const: nxp,pca9546
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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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"#interrupt-cells":
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const: 2
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interrupt-controller: true
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reset-gpios:
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maxItems: 1
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i2c-mux-idle-disconnect:
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type: boolean
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description: Forces mux to disconnect all children in idle state. This is
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necessary for example, if there are several multiplexers on the bus and
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the devices behind them use same I2C addresses.
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idle-state:
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description: if present, overrides i2c-mux-idle-disconnect
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$ref: /schemas/mux/mux-controller.yaml#/properties/idle-state
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required:
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- compatible
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- reg
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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i2c-mux@74 {
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compatible = "nxp,pca9548";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x74>;
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interrupt-parent = <&ipic>;
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interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
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interrupt-controller;
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#interrupt-cells = <2>;
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i2c@2 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <2>;
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eeprom@54 {
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compatible = "atmel,24c08";
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reg = <0x54>;
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};
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};
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i2c@4 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <4>;
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rtc@51 {
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compatible = "nxp,pcf8563";
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reg = <0x51>;
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};
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};
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};
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};
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...
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