# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/spi/mediatek,spi-mtk-snfi.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: SPI-NAND flash controller for MediaTek ARM SoCs maintainers: - Chuanhong Guo description: | The Mediatek SPI-NAND flash controller is an extended version of the Mediatek NAND flash controller. It can perform standard SPI instructions with one continuous write and one read for up-to 0xa0 bytes. It also supports typical SPI-NAND page cache operations in single, dual or quad IO mode with pipelined ECC encoding/decoding using the accompanying ECC engine. There should be only one spi slave device following generic spi bindings. properties: compatible: enum: - mediatek,mt7622-snand - mediatek,mt7629-snand - mediatek,mt7986-snand reg: items: - description: core registers interrupts: items: - description: NFI interrupt clocks: minItems: 2 maxItems: 3 clock-names: minItems: 2 maxItems: 3 nand-ecc-engine: description: device-tree node of the accompanying ECC engine. $ref: /schemas/types.yaml#/definitions/phandle mediatek,rx-latch-latency-ns: description: Data read latch latency, unit is nanoseconds. required: - compatible - reg - interrupts - clocks - clock-names - nand-ecc-engine allOf: - $ref: /schemas/spi/spi-controller.yaml# - if: properties: compatible: enum: - mediatek,mt7622-snand - mediatek,mt7629-snand then: properties: clocks: items: - description: clock used for the controller - description: clock used for the SPI bus clock-names: items: - const: nfi_clk - const: pad_clk - if: properties: compatible: enum: - mediatek,mt7986-snand then: properties: clocks: items: - description: clock used for the controller - description: clock used for the SPI bus - description: clock used for the AHB bus clock-names: items: - const: nfi_clk - const: pad_clk - const: nfi_hclk unevaluatedProperties: false examples: - | #include #include #include soc { #address-cells = <2>; #size-cells = <2>; snfi: spi@1100d000 { compatible = "mediatek,mt7622-snand"; reg = <0 0x1100d000 0 0x1000>; interrupts = ; clocks = <&pericfg CLK_PERI_NFI_PD>, <&pericfg CLK_PERI_SNFI_PD>; clock-names = "nfi_clk", "pad_clk"; nand-ecc-engine = <&bch>; #address-cells = <1>; #size-cells = <0>; flash@0 { compatible = "spi-nand"; reg = <0>; spi-tx-bus-width = <4>; spi-rx-bus-width = <4>; nand-ecc-engine = <&snfi>; }; }; };