Hello, devnull+keguang.zhang.gmail.com@xxxxxxxxxx wrote on Tue, 30 Apr 2024 19:11:10 +0800: > From: Keguang Zhang <keguang.zhang@xxxxxxxxx> > > Add devicetree binding document for Loongson-1 NAND Controller. > > Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx> > --- > Changes in v7: > - rename the file to loongson,ls1b-nfc.yaml > > Changes in v6: > - A newly added patch > --- > .../devicetree/bindings/mtd/loongson,ls1b-nfc.yaml | 66 ++++++++++++++++++++++ > 1 file changed, 66 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mtd/loongson,ls1b-nfc.yaml b/Documentation/devicetree/bindings/mtd/loongson,ls1b-nfc.yaml > new file mode 100644 > index 000000000000..a69f22b9fd9e > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/loongson,ls1b-nfc.yaml > @@ -0,0 +1,66 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mtd/loongson,ls1b-nfc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Loongson-1 NAND Controller > + > +maintainers: > + - Keguang Zhang <keguang.zhang@xxxxxxxxx> > + > +allOf: > + - $ref: nand-controller.yaml > + > +properties: > + compatible: > + oneOf: > + - const: loongson,ls1b-nfc What is the rationale behind this choice? Seems like the b variant has two possible implementations and should always be preceded by a more specific compatible. As there is currently no description of this controller upstream, I would not care too much about any out-of-tree description and directly go for a clean description. > + - items: > + - enum: > + - loongson,ls1a-nfc > + - loongson,ls1c-nfc > + - const: loongson,ls1b-nfc > + > + reg: > + maxItems: 1 > + > + dmas: > + maxItems: 1 > + > + dma-names: > + const: rxtx > + > +patternProperties: > + "^nand@[0-3]$": > + type: object > + $ref: raw-nand-chip.yaml > + > + unevaluatedProperties: false > + > +required: > + - compatible > + - reg > + - dmas > + - dma-names Should DMA props be required? > + > +unevaluatedProperties: false > + > +examples: > + - | > + nand-controller@1fe78000 { > + compatible = "loongson,ls1b-nfc"; > + reg = <0x1fe78000 0x40>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + > + dmas = <&dma 0>; > + dma-names = "rxtx"; There is a preferred spacing for DT nodes, see: https://docs.kernel.org/devicetree/bindings/dts-coding-style.html > + > + nand@0 { > + reg = <0>; > + nand-use-soft-ecc-engine; > + nand-ecc-algo = "hamming"; These two properties are not needed. Unless there is no hardware ECC capability on this controller and in this case you need to ensure the properties are present in the schema. > + }; > + }; > Thanks, Miquèl
