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 09:31:00 +0000
From:   <Kavyasree.Kotagiri@...rochip.com>
To:     <krzysztof.kozlowski@...aro.org>,
        <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

> > 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.
> 
Thanks for your comments.
Do you mean use "enum" instead of "const" in current patch itself and add new compatible in 2/3 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
> 
Ok. I will change it.

> > +                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