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Message-Id: <20241217-loongson1-nand-v11-1-b692c58988bb@gmail.com>
Date: Tue, 17 Dec 2024 18:16:49 +0800
From: Keguang Zhang via B4 Relay <devnull+keguang.zhang.gmail.com@...nel.org>
To: Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-media@...r.kernel.org,
Keguang Zhang <keguang.zhang@...il.com>,
Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH v11 1/2] dt-bindings: mtd: Add Loongson-1 NAND Controller
From: Keguang Zhang <keguang.zhang@...il.com>
Add devicetree binding document for Loongson-1 NAND controller.
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
---
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@...il.com>
+
+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@...78000 {
+ 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
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