linux-kernel - Re: [PATCH v2 1/4] dt-bindings: mmc: convert mmc-spi-slot to yaml

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Date:   Mon, 6 Jun 2022 14:30:36 -0500
From:   Rob Herring <robh@...nel.org>
To:     Conor Dooley <mail@...chuod.ie>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Support Opensource <support.opensource@...semi.com>,
        Lee Jones <lee.jones@...aro.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Steve Twiss <stwiss.opensource@...semi.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-riscv@...ts.infradead.org,
        Atul Khare <atulkhare@...osinc.com>
Subject: Re: [PATCH v2 1/4] dt-bindings: mmc: convert mmc-spi-slot to yaml

On Mon, Jun 06, 2022 at 04:25:55PM +0100, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> Convert the mmc-spi-slot text based binding doc to yaml,
> with the side effect of cleaning up some of the riscv
> dtbs_check warnings.
> 
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
>  .../devicetree/bindings/mmc/mmc-spi-slot.txt  | 29 -------
>  .../devicetree/bindings/mmc/mmc-spi-slot.yaml | 79 +++++++++++++++++++
>  2 files changed, 79 insertions(+), 29 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt
>  create mode 100644 Documentation/devicetree/bindings/mmc/mmc-spi-slot.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt
> deleted file mode 100644
> index 5e74db69f581..000000000000
> --- a/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt
> +++ /dev/null
> @@ -1,29 +0,0 @@
> -MMC/SD/SDIO slot directly connected to a SPI bus
> -
> -This file documents differences between the core properties described
> -by mmc.txt and the properties used by the mmc_spi driver.
> -
> -Required properties:
> -- spi-max-frequency : maximum frequency for this device (Hz).
> -
> -Optional properties:
> -- voltage-ranges : two cells are required, first cell specifies minimum
> -  slot voltage (mV), second cell specifies maximum slot voltage (mV).
> -  Several ranges could be specified. If not provided, 3.2v..3.4v is assumed.
> -- gpios : may specify GPIOs in this order: Card-Detect GPIO,
> -  Write-Protect GPIO. Note that this does not follow the
> -  binding from mmc.txt, for historical reasons.
> -
> -Example:
> -
> -	mmc-slot@0 {
> -		compatible = "fsl,mpc8323rdb-mmc-slot",
> -			     "mmc-spi-slot";
> -		reg = <0>;
> -		gpios = <&qe_pio_d 14 1
> -			 &qe_pio_d 15 0>;
> -		voltage-ranges = <3300 3300>;
> -		spi-max-frequency = <50000000>;
> -		interrupts = <42>;
> -		interrupt-parent = <&PIC>;
> -	};
> diff --git a/Documentation/devicetree/bindings/mmc/mmc-spi-slot.yaml b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.yaml
> new file mode 100644
> index 000000000000..cf79092de8fe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.yaml
> @@ -0,0 +1,79 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mmc/mmc-spi-slot.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MMC/SD/SDIO slot directly connected to a SPI bus
> +
> +maintainers:
> +  - Ulf Hansson <ulf.hansson@...aro.org>
> +
> +allOf:
> +  - $ref: "mmc-controller.yaml"
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml
> +
> +description: |
> +  The extra properties used by an mmc connected via SPI.
> +
> +properties:
> +  compatible:
> +    const: mmc-spi-slot
> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-max-frequency: true
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  voltage-ranges:
> +    $ref: /schemas/types.yaml#/definitions/uint32-matrix

Looks more like an array to me.

Otherwise,

Reviewed-by: Rob Herring <robh@...nel.org>

> +    description: |
> +      Two cells are required, first cell specifies minimum slot voltage (mV),
> +      second cell specifies maximum slot voltage (mV).
> +    items:
> +      items:
> +        - description: |
> +            value for minimum slot voltage
> +          default: 3200
> +        - description: |
> +            value for maximum slot voltage
> +          default: 3400
> +    maxItems: 1
> +
> +  gpios:
> +    description: |
> +      For historical reasons, this does not follow the generic mmc-controller
> +      binding.
> +    minItems: 1
> +    items:
> +      - description: Card-Detect GPIO
> +      - description: Write-Protect GPIO
> +
> +required:
> +  - compatible
> +  - reg
> +  - spi-max-frequency
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    spi {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +      mmc@0 {
> +        compatible = "mmc-spi-slot";
> +        reg = <0>;
> +        gpios = <&gpio 14 GPIO_ACTIVE_LOW>, <&gpio 15 GPIO_ACTIVE_HIGH>;
> +        voltage-ranges = <3300 3300>;
> +        spi-max-frequency = <50000000>;
> +        interrupts = <42>;
> +        interrupt-parent = <&PIC>;
> +      };
> +    };
> +
> +...
> -- 
> 2.36.1
> 
>