Re: [PATCH 5/6] dt-bindings: i2c: i2c-mux-pca954x: Convert to DT schema

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Rob,

Thank you for the patch.

On Tue, May 18, 2021 at 06:28:57PM -0500, Rob Herring wrote:
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
>  .../bindings/i2c/i2c-mux-pca954x.txt          |  74 ------------
>  .../bindings/i2c/i2c-mux-pca954x.yaml         | 106 ++++++++++++++++++
>  2 files changed, 106 insertions(+), 74 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.txt
>  create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.txt b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.txt
> deleted file mode 100644
> index 9f3f3eb67e87..000000000000
> --- a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.txt
> +++ /dev/null
> @@ -1,74 +0,0 @@
> -* NXP PCA954x I2C bus switch
> -
> -The driver supports NXP PCA954x and PCA984x I2C mux/switch devices.
> -
> -Required Properties:
> -
> -  - compatible: Must contain one of the following.
> -    "nxp,pca9540",
> -    "nxp,pca9542",
> -    "nxp,pca9543",
> -    "nxp,pca9544",
> -    "nxp,pca9545",
> -    "nxp,pca9546", "nxp,pca9846",
> -    "nxp,pca9547", "nxp,pca9847",
> -    "nxp,pca9548", "nxp,pca9848",
> -    "nxp,pca9849"
> -
> -  - reg: The I2C address of the device.
> -
> -  The following required properties are defined externally:
> -
> -  - Standard I2C mux properties. See i2c-mux.txt in this directory.
> -  - I2C child bus nodes. See i2c-mux.txt in this directory.
> -
> -Optional Properties:
> -
> -  - reset-gpios: Reference to the GPIO connected to the reset input.
> -  - idle-state: if present, overrides i2c-mux-idle-disconnect,
> -    Please refer to Documentation/devicetree/bindings/mux/mux-controller.yaml
> -  - i2c-mux-idle-disconnect: Boolean; if defined, forces mux to disconnect all
> -    children in idle state. This is necessary for example, if there are several
> -    multiplexers on the bus and the devices behind them use same I2C addresses.
> -  - interrupts: Interrupt mapping for IRQ.
> -  - interrupt-controller: Marks the device node as an interrupt controller.
> -  - #interrupt-cells : Should be two.
> -    - first cell is the pin number
> -    - second cell is used to specify flags.
> -    See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
> -
> -Example:
> -
> -	i2c-switch@74 {
> -		compatible = "nxp,pca9548";
> -		#address-cells = <1>;
> -		#size-cells = <0>;
> -		reg = <0x74>;
> -
> -		interrupt-parent = <&ipic>;
> -		interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
> -		interrupt-controller;
> -		#interrupt-cells = <2>;
> -
> -		i2c@2 {
> -			#address-cells = <1>;
> -			#size-cells = <0>;
> -			reg = <2>;
> -
> -			eeprom@54 {
> -				compatible = "atmel,24c08";
> -				reg = <0x54>;
> -			};
> -		};
> -
> -		i2c@4 {
> -			#address-cells = <1>;
> -			#size-cells = <0>;
> -			reg = <4>;
> -
> -			rtc@51 {
> -				compatible = "nxp,pcf8563";
> -				reg = <0x51>;
> -			};
> -		};
> -	};
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
> new file mode 100644
> index 000000000000..82d9101098c7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
> @@ -0,0 +1,106 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/i2c/i2c-mux-pca954x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP PCA954x I2C bus switch
> +
> +maintainers:
> +  - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> +
> +description:
> +  The binding supports NXP PCA954x and PCA984x I2C mux/switch devices.
> +
> +allOf:
> +  - $ref: /schemas/i2c/i2c-mux.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - nxp,pca9540
> +      - nxp,pca9542
> +      - nxp,pca9543
> +      - nxp,pca9544
> +      - nxp,pca9545
> +      - nxp,pca9546
> +      - nxp,pca9547
> +      - nxp,pca9548
> +      - nxp,pca9849

I'd put this entry last to keep them alphabetically sorted.

While at it, could you add nxp,pca9646 as the driver supports it ?

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +      - nxp,pca9846
> +      - nxp,pca9847
> +      - nxp,pca9848
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  "#interrupt-cells":
> +    const: 2
> +
> +  interrupt-controller: true
> +
> +  reset-gpios:
> +    maxItems: 1
> +
> +  i2c-mux-idle-disconnect:
> +    type: boolean
> +    description: Forces mux to disconnect all children in idle state. This is
> +      necessary for example, if there are several multiplexers on the bus and
> +      the devices behind them use same I2C addresses.
> +
> +  idle-state:
> +    description: if present, overrides i2c-mux-idle-disconnect
> +    $ref: /schemas/mux/mux-controller.yaml#/properties/idle-state
> +
> +required:
> +  - compatible
> +  - reg
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        i2c-mux@74 {
> +            compatible = "nxp,pca9548";
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            reg = <0x74>;
> +
> +            interrupt-parent = <&ipic>;
> +            interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
> +            interrupt-controller;
> +            #interrupt-cells = <2>;
> +
> +            i2c@2 {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +                reg = <2>;
> +
> +                eeprom@54 {
> +                    compatible = "atmel,24c08";
> +                    reg = <0x54>;
> +                };
> +            };
> +
> +            i2c@4 {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +                reg = <4>;
> +
> +                rtc@51 {
> +                    compatible = "nxp,pcf8563";
> +                    reg = <0x51>;
> +                };
> +            };
> +        };
> +    };
> +...

-- 
Regards,

Laurent Pinchart