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|
# 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 <gch981213@gmail.com>
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 <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/mt7622-clk.h>
soc {
#address-cells = <2>;
#size-cells = <2>;
snfi: spi@1100d000 {
compatible = "mediatek,mt7622-snand";
reg = <0 0x1100d000 0 0x1000>;
interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_LOW>;
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>;
};
};
};
|
