linux-kernel - Re: [PATCH 2/6] dt-bindings: can: mcp25xxfd: document device tree bindings

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Date:   Tue, 22 Sep 2020 13:32:11 -0600
From:   Rob Herring <robh@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     wg@...ndegger.com, mkl@...gutronix.de, linux-can@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dev.kurt@...dijck-laurijssen.be, o.rempel@...gutronix.de
Subject: Re: [PATCH 2/6] dt-bindings: can: mcp25xxfd: document device tree
 bindings

On Thu, Sep 10, 2020 at 07:08:02PM +0530, Manivannan Sadhasivam wrote:
> From: Oleksij Rempel <o.rempel@...gutronix.de>
> 
> This patch adds the device-tree binding documentation for the Microchip
> MCP25xxFD SPI CAN controller family.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  .../bindings/net/can/microchip,mcp25xxfd.yaml | 79 +++++++++++++++++++
>  1 file changed, 79 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml b/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
> new file mode 100644
> index 000000000000..aa2cad14d6d7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
> @@ -0,0 +1,79 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/can/microchip,mcp25xxfd.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title:
> +  Microchip MCP2517FD and MCP2518FD stand-alone CAN controller device tree
> +  bindings
> +
> +maintainers:
> +  - Marc Kleine-Budde <mkl@...gutronix.de>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: microchip,mcp2517fd
> +        description: for MCP2517FD
> +      - const: microchip,mcp2518fd
> +        description: for MCP2518FD
> +      - const: microchip,mcp25xxfd
> +        description: to autodetect chip variant
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts-extended:

Use 'interrupts'. (interrupts-extended will automagically be supported 
by the tools)

> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  vdd-supply:
> +    description: Regulator that powers the CAN controller.
> +    maxItems: 1

-supply is always a single item. Drop.

> +
> +  xceiver-supply:
> +    description: Regulator that powers the CAN transceiver.
> +    maxItems: 1

ditto

> +
> +  microchip,rx-int-gpios:
> +    description:
> +      GPIO phandle of GPIO connected to to INT1 pin of the MCP25XXFD, which
> +      signals a pending RX interrupt.
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    description:
> +      Must be half or less of "clocks" frequency.
> +    maximum: 20000000
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts-extended

interrupts

> +  - clocks

Add:

additionalProperties: false

> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    spi0 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        can@0 {
> +            compatible = "microchip,mcp25xxfd";
> +            reg = <0>;
> +            clocks = <&can0_osc>;
> +            pinctrl-names = "default";
> +            pinctrl-0 = <&can0_pins>;
> +            spi-max-frequency = <20000000>;
> +            interrupts-extended = <&gpio 13 IRQ_TYPE_LEVEL_LOW>;
> +            microchip,rx-int-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
> +            vdd-supply = <&reg5v0>;
> +            xceiver-supply = <&reg5v0>;
> +        };
> +    };
> -- 
> 2.17.1
>