linux-kernel - Re: [PATCH v6 1/2] dt-bindings: mtd: Add Nand Flash Controller support for Intel LGM SoC

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Date:   Fri, 15 May 2020 10:06:22 +0800
From:   "Ramuthevar, Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        devicetree@...r.kernel.org, miquel.raynal@...tlin.com,
        richard@....at, vigneshr@...com, arnd@...db.de,
        brendanhiggins@...gle.com, tglx@...utronix.de,
        boris.brezillon@...labora.com, anders.roxell@...aro.org,
        masonccyang@...c.com.tw, linux-mips@...r.kernel.org,
        hauke.mehrtens@...el.com, andriy.shevchenko@...el.com,
        qi-ming.wu@...el.com, cheol.yong.kim@...el.com
Subject: Re: [PATCH v6 1/2] dt-bindings: mtd: Add Nand Flash Controller
 support for Intel LGM SoC

Hi Rob,

    Thank you for the review comments...

On 14/5/2020 9:03 pm, Rob Herring wrote:
> On Wed, May 13, 2020 at 06:46:14PM +0800, Ramuthevar,Vadivel MuruganX wrote:
>> From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
>>
>> Add YAML file for dt-bindings to support NAND Flash Controller
>> on Intel's Lightning Mountain SoC.
>>
>> Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
>> ---
>>   .../devicetree/bindings/mtd/intel,lgm-nand.yaml    | 83 ++++++++++++++++++++++
>>   1 file changed, 83 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/mtd/intel,lgm-nand.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/intel,lgm-nand.yaml b/Documentation/devicetree/bindings/mtd/intel,lgm-nand.yaml
>> new file mode 100644
>> index 000000000000..d9e0df8553fa
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mtd/intel,lgm-nand.yaml
>> @@ -0,0 +1,83 @@
>> +# SPDX-License-Identifier: GPL-2.0
> 
> Dual license new bindings please:
> 
> (GPL-2.0-only OR BSD-2-Clause)
Noted.
> 
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mtd/intel,lgm-nand.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Intel LGM SoC NAND Controller Device Tree Bindings
>> +
>> +allOf:
>> +  - $ref: "nand-controller.yaml"
>> +
>> +maintainers:
>> +  - Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: intel,lgm-nand-controller
>> +
>> +  reg:
>> +    maxItems: 1
> 
> Looks like you have 4 or 6 entries, not 1. Need to define what each one
> is.
Sure, will define it.
> 
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  dmas:
>> +    maxItems: 2
>> +
>> +  dma-names:
>> +    enum:
>> +      - rx
>> +      - tx
> 
> This defines a single entry. I believe you want:
> 
> items:
>    - const: tx
>    - const: rx
Yes, Thanks!

> 
>> +
>> +  pinctrl-names: true
> 
> No need for this. Tools add pinctrl properties.
will drop it.
> 
>> +
>> +patternProperties:
>> +  "^nand@[a-f0-9]+$":
>> +    type: object
>> +    properties:
>> +      reg:
>> +        minimum: 0
>> +        maximum: 7
>> +
>> +      nand-ecc-mode: true
>> +
>> +      nand-ecc-algo:
>> +        const: hw
>> +
>> +    additionalProperties: false
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - dmas
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    nand-controller@...00000 {
>> +      compatible = "intel,nand-controller";
> 
> Doesn't match the schema.
Noted, will update the schema name.
> 
>> +      reg = <0xe0f00000 0x100>,
>> +            <0xe1000000 0x300>,
>> +            <0xe1400000 0x8000>,
>> +            <0xe1c00000 0x1000>;
> 
> Is it 4 or 6 entries?
yes, will update.
> 
>> +      reg-names = "ebunand", "hsnand", "nand_cs0", "nand_cs1",
>> +        "addr_sel0","addr_sel1";
> 
> Not documented.
Noted, will document it.
> 
>> +      clocks = <&cgu0 125>;
>> +      dma-names = "tx", "rx";
>> +      #address-cells = <1>;
>> +      #size-cells = <0>;
>> +      #clock-cells = <1>;
> 
> This is a clock provider too?
Yes, it is getting clock from CGU for nand-controller.

Regards
Vadivel
> 
>> +
>> +      nand@0 {
>> +        reg = <0>;
>> +        nand-on-flash-bbt;
>> +        #address-cells = <1>;
>> +        #size-cells = <1>;
>> +      };
>> +    };
>> +
>> +...
>> -- 
>> 2.11.0
>>