new file mode 100644
@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/rockchip,nand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip SoCs NAND FLASH Controller (NFC) Device Tree Bindings
+
+allOf:
+ - $ref: "nand-controller.yaml"
+
+maintainers:
+ - Yifeng Zhao <yifeng.zhao@rock-chips.com>
+
+properties:
+ "#address-cells": true
+ "#size-cells": true
+
+ compatible:
+ const: rockchip,nfc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: Module Clock
+ - description: Bus Clock
+
+ clock-names:
+ items:
+ - const: clk_nfc
+ - const: clk_ahb
+
+ clock-rates:
+ maximum: 150000000
+
+ pinctrl-names: true
+
+patternProperties:
+ "^pinctrl-[0-9]+$": true
+
+ "^nand@[a-f0-9]$":
+ type: object
+ properties:
+ reg:
+ minimum: 0
+ maximum: 3
+
+ nand-ecc-step-size:
+ const: 1024
+
+ nand-ecc-strength:
+ enum: [16, 24 , 40, 60, 70]
+
+ nand-bus-width:
+ const: 8
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/rk3308-cru.h>
+ nfc: nand-controller@ff4b0000 {
+ compatible = "rockchip,nfc";
+ reg = <0x0 0xff4b0000 0x0 0x4000>;
+ interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cru SCLK_NANDC>, <&cru HCLK_NANDC>;
+ clock-names = "clk_nfc", "clk_ahb";
+ clock-rates = <150000000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&flash_csn0 &flash_rdy &flash_ale &flash_cle
+ &flash_wrn &flash_rdn &flash_bus8>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ nand@0 {
+ reg = <0>;
+ nand-ecc-mode = "hw";
+ nand-ecc-strength = <16>;
+ nand-ecc-step-size = <1024>;
+ nand-bus-width = <8>;
+ };
+ };
+
+...
Documentation support for Rockchip RK3xxx NAND flash controllers Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com> --- Changes in v3: -change the title for the dt-bindings Changes in v2: None .../bindings/mtd/rockchip,nand.yaml | 95 +++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/rockchip,nand.yaml