linux-kernel - Re: [PATCH v2 1/3] dt-bindings: mfd: atmel,flexcom: Convert to json-schema

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Date:   Wed, 8 Jun 2022 10:34:33 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Kavyasree Kotagiri <kavyasree.kotagiri@...rochip.com>,
        krzysztof.kozlowski+dt@...aro.org, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com, claudiu.beznea@...rochip.com
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH v2 1/3] dt-bindings: mfd: atmel,flexcom: Convert to
 json-schema

On 07/06/2022 16:47, Kavyasree Kotagiri wrote:
> Convert the Atmel flexcom device tree bindings to json schema.
> 
> Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@...rochip.com>
> ---
> v1 -> v2:
>  - Fix title.
> 
>  .../bindings/mfd/atmel,flexcom.yaml           | 97 +++++++++++++++++++
>  .../devicetree/bindings/mfd/atmel-flexcom.txt | 63 ------------
>  2 files changed, 97 insertions(+), 63 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
>  delete mode 100644 Documentation/devicetree/bindings/mfd/atmel-flexcom.txt
> 
> diff --git a/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
> new file mode 100644
> index 000000000000..05cb6ebb4b2a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml
> @@ -0,0 +1,97 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/atmel,flexcom.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Atmel Flexcom (Flexible Serial Communication Unit)
> +
> +maintainers:
> +  - Kavyasree Kotagiri <kavyasree.kotagiri@...rochip.com>
> +
> +description:
> +  The Atmel Flexcom is just a wrapper which embeds a SPI controller,
> +  an I2C controller and an USART. Only one function can be used at a
> +  time and is chosen at boot time according to the device tree.
> +
> +properties:
> +  compatible:
> +    const: atmel,sama5d2-flexcom

Same comment applies as before... Your previous set was better here and
for some reason you decided to change it. This should be enum so you
avoid useless change next patch.

> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 1
> +
> +  ranges:
> +    description:
> +      One range for the full I/O register region. (including USART,
> +      TWI and SPI registers).
> +    items:
> +      maxItems: 3
> +
> +  atmel,flexcom-mode:
> +    description: |
> +      Specifies the flexcom mode as follows:
> +      1: USART
> +      2: SPI
> +      3: I2C.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [1, 2, 3]
> +
> +patternProperties:
> +  "^serial@[0-9a-f]+$":
> +    description: See atmel-usart.txt for details of USART bindings.
> +    type: object
> +
> +  "^spi@[0-9a-f]+$":
> +    description: See ../spi/spi_atmel.txt for details of SPI bindings.
> +    type: object
> +
> +  "^i2c@[0-9a-f]+$":
> +    description: See ../i2c/i2c-at91.txt for details of I2C bindings.
> +    type: object
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - "#address-cells"
> +  - "#size-cells"
> +  - ranges
> +  - atmel,flexcom-mode
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    flx0: flexcom@...34000 {
> +          compatible = "atmel,sama5d2-flexcom";
> +          reg = <0xf8034000 0x200>;
> +          clocks = <&flx0_clk>;
> +          #address-cells = <1>;
> +          #size-cells = <1>;
> +          ranges = <0x0 0xf8034000 0x800>;
> +          atmel,flexcom-mode = <2>;
> +
> +          spi0: spi@400 {
> +                compatible = "atmel,at91rm9200-spi";
> +                reg = <0x400 0x200>;
> +                interrupts = <19 4 7>;

as pointed - looks like a IRQ flag

> +                pinctrl-names = "default";
> +                pinctrl-0 = <&pinctrl_flx0_default>;
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +                clocks = <&flx0_clk>;
> +                clock-names = "spi_clk";
> +                atmel,fifo-size = <32>;
> +          };
> +    };



Best regards,
Krzysztof