linux-kernel - Re: [PATCH] dt-bindings: mtd: spi-nand: Convert to DT schema format

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Message-ID: <8f51f347-54d9-d509-303c-d858b3d1896e@ti.com>
Date:   Tue, 20 Jul 2021 19:45:59 +0530
From:   "Nandan, Apurva" <a-nandan@...com>
To:     Rob Herring <robh@...nel.org>
CC:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        <linux-mtd@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Pratyush Yadav <p.yadav@...com>,
        Michael Walle <michael@...le.cc>
Subject: Re: [PATCH] dt-bindings: mtd: spi-nand: Convert to DT schema format



On 19-Jul-21 8:54 PM, Rob Herring wrote:
> On Sun, Jul 18, 2021 at 12:41:25AM +0000, Apurva Nandan wrote:
>> Convert spi-nand.txt binding to YAML format with an added example.
>>
>> Signed-off-by: Apurva Nandan <a-nandan@...com>
>> ---
>>  .../devicetree/bindings/mtd/spi-nand.txt      |  5 --
>>  .../devicetree/bindings/mtd/spi-nand.yaml     | 74 +++++++++++++++++++
>>  2 files changed, 74 insertions(+), 5 deletions(-)
>>  delete mode 100644 Documentation/devicetree/bindings/mtd/spi-nand.txt
>>  create mode 100644 Documentation/devicetree/bindings/mtd/spi-nand.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/spi-nand.txt b/Documentation/devicetree/bindings/mtd/spi-nand.txt
>> deleted file mode 100644
>> index 8b51f3b6d55c..000000000000
>> --- a/Documentation/devicetree/bindings/mtd/spi-nand.txt
>> +++ /dev/null
>> @@ -1,5 +0,0 @@
>> -SPI NAND flash
>> -
>> -Required properties:
>> -- compatible: should be "spi-nand"
>> -- reg: should encode the chip-select line used to access the NAND chip
>> diff --git a/Documentation/devicetree/bindings/mtd/spi-nand.yaml b/Documentation/devicetree/bindings/mtd/spi-nand.yaml
>> new file mode 100644
>> index 000000000000..366b86e1b19c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mtd/spi-nand.yaml
>> @@ -0,0 +1,74 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mtd/spi-nand.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: SPI NAND flash
>> +
>> +maintainers:
>> +  - Apurva Nandan <a-nandan@...com>
>> +
>> +allOf:
>> +  - $ref: "mtd.yaml#"
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - const: spi-nand
> 
> Drop 'oneOf' as there is only one.
> 
>> +
>> +  reg:
>> +    items:
>> +      description:
>> +        should encode the chip-select line used to access the NAND chip
> 
> Just:
> 
> reg:
>   maxItems: 1
> 
>> +
>> +  spi-max-frequency: true
>> +  spi-rx-bus-width: true
>> +  spi-tx-bus-width: true
>> +
>> +  partitions:
>> +    type: object
>> +
>> +  '#address-cells': true
>> +  '#size-cells': true
>> +
>> +patternProperties:
>> +  # Note: use 'partitions' node for new users
>> +  '^partition@':
>> +    type: object
>> +
>> +  "^otp(-[0-9]+)?$":
>> +    type: object
>> +
>> +additionalProperties: false
> 
> Just do:
> 
> additionalProperties:
>   type: object
> 
> and then drop partitions, partition@, and ^otp(-[0-9]+)?$.
> 
>> +
>> +examples:
>> +  - |
>> +    spi {
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        flash@6 {
>> +            #address-cells = <1>;
>> +            #size-cells = <1>;
>> +            compatible = "spi-nand";
>> +            reg = <0x6>;
>> +            spi-max-frequency = <42000000>;
>> +
>> +            partitions {
>> +                compatible = "fixed-partitions";
>> +                #address-cells = <1>;
>> +                #size-cells = <1>;
>> +
>> +                partition@0 {
>> +                    label = "boot";
>> +                    reg = <0 0x200000>;
>> +                };
>> +
>> +                partition@...000 {
>> +                    label = "rootfs";
>> +                    reg = <0x200000 0xce0000>;
>> +                };
>> +            };
>> +        };
>> +    };
>> -- 
>> 2.17.1
>>
>>

Agree with all the suggestions made, will correct and send v2.

Thanks,
Apurva Nandan