linux-kernel - Re: [RESENDPATCH v8 1/2] dt-bindings: mtd: Add Nand Flash Controller support for Intel LGM SoC

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Message-ID: <20200526204306.GA224630@bogus>
Date:   Tue, 26 May 2020 14:43:06 -0600
From:   Rob Herring <robh@...nel.org>
To:     "Ramuthevar,Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
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: [RESENDPATCH v8 1/2] dt-bindings: mtd: Add Nand Flash Controller
 support for Intel LGM SoC

On Wed, May 20, 2020 at 08:06:20AM +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    | 91 ++++++++++++++++++++++
>  1 file changed, 91 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..cd4e983a449e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/intel,lgm-nand.yaml
> @@ -0,0 +1,91 @@
> +# SPDX-License-Identifier: GPL-2.0

Still not dual licensed.

> +%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

Still doesn't match the example. And the example will fail when it does.

> +
> +  reg:
> +    items:
> +       - description: ebunand registers
> +       - description: hsnand registers
> +       - description: nand_cs0 external flash access
> +       - description: nand_cs1 external flash access
> +       - description: addr_sel0 memory region enable and access
> +       - description: addr_sel1 memory region enable and access

reg-names?

> +
> +  clocks:
> +    maxItems: 1
> +
> +  dmas:
> +    maxItems: 2
> +
> +  dma-names:
> +    items:
> +      - const: tx
> +      - const: rx
> +
> +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

Not documented or should be dropped.

> +  - dmas
> +  - dma-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    nand-controller@...00000 {
> +      compatible = "intel,lgm-nand";
> +      reg = <0xe0f00000 0x100>,
> +            <0xe1000000 0x300>,
> +            <0xe1400000 0x8000>,
> +            <0xe1c00000 0x1000>,
> +            <0x17400000 0x4>,
> +            <0x17c00000 0x4>;
> +      reg-names = "ebunand", "hsnand", "nand_cs0", "nand_cs1",
> +        "addr_sel0","addr_sel1";

Not documented. And needs a space after the ','.

> +      clocks = <&cgu0 125>;
> +      dmas = <&dma0 8>, <&dma0 9>;
> +      dma-names = "tx", "rx";
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +      #clock-cells = <1>;

Should be removed?

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