linux-kernel - Re: [PATCH v3 7/9] dt-bindings: mtd: Split ECC engine with rawnand controller

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Date:   Thu, 8 Dec 2022 11:00:35 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Xiangsheng Hou <xiangsheng.hou@...iatek.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Chuanhong Guo <gch981213@...il.com>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org, benliang.zhao@...iatek.com,
        bin.zhang@...iatek.com
Subject: Re: [PATCH v3 7/9] dt-bindings: mtd: Split ECC engine with rawnand
 controller

Hi Krzysztof,

krzysztof.kozlowski@...aro.org wrote on Thu, 8 Dec 2022 10:44:17 +0100:

> On 08/12/2022 07:29, Xiangsheng Hou wrote:
> > Split MediaTek ECC engine with rawnand controller and convert to
> > YAML schema.
> > 
> > Signed-off-by: Xiangsheng Hou <xiangsheng.hou@...iatek.com>
> > ---
> >  .../bindings/mtd/mediatek,mtk-nfc.yaml        | 154 +++++++++++++++
> >  .../mtd/mediatek,nand-ecc-engine.yaml         |  62 ++++++
> >  .../devicetree/bindings/mtd/mtk-nand.txt      | 176 ------------------
> >  3 files changed, 216 insertions(+), 176 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/mtd/mediatek,mtk-nfc.yaml
> >  create mode 100644 Documentation/devicetree/bindings/mtd/mediatek,nand-ecc-engine.yaml
> >  delete mode 100644 Documentation/devicetree/bindings/mtd/mtk-nand.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/mtd/mediatek,mtk-nfc.yaml b/Documentation/devicetree/bindings/mtd/mediatek,mtk-nfc.yaml
> > new file mode 100644
> > index 000000000000..eb1a44c7ae4e
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mtd/mediatek,mtk-nfc.yaml
> > @@ -0,0 +1,154 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/mtd/mediatek,mtk-nfc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: MediaTek(MTK) SoCs raw NAND FLASH controller (NFC)
> > +
> > +maintainers:
> > +  - Xiangsheng Hou <xiangsheng.hou@...iatek.com>
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - mediatek,mt2701-nfc
> > +      - mediatek,mt2712-nfc
> > +      - mediatek,mt7622-nfc
> > +
> > +  reg:
> > +    items:
> > +      - description: Base physical address and size of NFI.
> > +
> > +  interrupts:
> > +    items:
> > +      - description: NFI interrupt
> > +
> > +  clocks:
> > +    items:
> > +      - description: clock used for the controller
> > +      - description: clock used for the pad
> > +
> > +  clock-names:
> > +    items:
> > +      - const: nfi_clk
> > +      - const: pad_clk
> > +
> > +  ecc-engine:
> > +    description: device-tree node of the required ECC engine.
> > +    $ref: /schemas/types.yaml#/definitions/phandle
> > +
> > +patternProperties:
> > +  "^nand@[a-f0-9]$":
> > +    type: object  
> 
> This should be instead:
>     $ref: nand-chip.yaml#
>     unevaluatedProperties: false
> 
> and then properties below (due to current dtschema limitations) should
> list properties from nand-controller.yaml:
> 
>       nand-on-flash-bbt: true
> 
> Optionally, we could create additional schema - nand-controller-chip,
> which would be referenced directly by nand-controller and itself would
> ref nand-chip.

Isn't this enough? (in linux-next)
https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git/tree/Documentation/devicetree/bindings/mtd/nand-controller.yaml?h=mtd/next#n54

Thanks,
Miquèl