From: Keguang Zhang <keguang.zhang@xxxxxxxxx> Add devicetree binding document for Loongson-1 NAND controller. Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx> --- Changes in v11: - Remove the requirement for 'nand-use-soft-ecc-engine' and 'nand-ecc-algo'. - Add 'reg-names' to support DMA address. Changes in v10: - None Changes in v9: - Change the compatible to 'loongson,ls1*-nand-controller'. - Rename the file to loongson,ls1b-nand-controller.yaml - Some minor adjustments. Changes in v8: - Add a description part. - Adjust the compatible because the match data for ls1c-nfc differs from ls1b-nfc. - Mark 'nand-use-soft-ecc-engine' and 'nand-ecc-algo' as mandatory. - Delete the superfluous blank lines. Changes in v7: - rename the file to loongson,ls1b-nfc.yaml Changes in v6: - A newly added patch --- .../mtd/loongson,ls1b-nand-controller.yaml | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/loongson,ls1b-nand-controller.yaml b/Documentation/devicetree/bindings/mtd/loongson,ls1b-nand-controller.yaml new file mode 100644 index 000000000000..f6530d64dc54 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/loongson,ls1b-nand-controller.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mtd/loongson,ls1b-nand-controller.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Loongson-1 NAND Controller + +maintainers: + - Keguang Zhang <keguang.zhang@xxxxxxxxx> + +description: + The Loongson-1 NAND controller abstracts all supported operations, + meaning it does not support low-level access to raw NAND flash chips. + Moreover, the controller is paired with the DMA engine to perform + READ and PROGRAM functions. + +allOf: + - $ref: nand-controller.yaml + +properties: + compatible: + oneOf: + - enum: + - loongson,ls1b-nand-controller + - loongson,ls1c-nand-controller + - items: + - enum: + - loongson,ls1a-nand-controller + - const: loongson,ls1b-nand-controller + + reg: + maxItems: 2 + + reg-names: + items: + - const: nand + - const: nand-dma + + dmas: + maxItems: 1 + + dma-names: + const: rxtx + +required: + - compatible + - reg + - reg-names + - dmas + - dma-names + +unevaluatedProperties: false + +examples: + - | + nand-controller@1fe78000 { + compatible = "loongson,ls1b-nand-controller"; + reg = <0x1fe78000 0x24>, <0x1fe78040 0x4>; + reg-names = "nand", "nand-dma"; + dmas = <&dma 0>; + dma-names = "rxtx"; + #address-cells = <1>; + #size-cells = <0>; + + nand@0 { + reg = <0>; + nand-use-soft-ecc-engine; + nand-ecc-algo = "hamming"; + }; + }; -- 2.43.0
