94 lines
2.4 KiB
YAML
94 lines
2.4 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/spi/nuvoton,npcm750-fiu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Nuvoton NPCM Flash Interface Unit (FIU) SPI Controller
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maintainers:
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- Tomer Maimon <tmaimon77@gmail.com>
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allOf:
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- $ref: /schemas/spi/spi-controller.yaml#
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description: |
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NPCM FIU supports single, dual and quad communication interface.
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The NPCM7XX supports three FIU modules:
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FIU0 and FIUx support two chip selects
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FIU3 supports four chip selects.
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The NPCM8XX supports four FIU modules:
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FIU0 and FIUx support two chip selects
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FIU1 and FIU3 support four chip selects.
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The FIU control register block is always required. The direct-mapped
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flash window is optional because the controller can still access flash
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through the UMA path when that mapping is not described.
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Alias convention:
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The '/aliases' node should define:
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For NPCM7xx: fiu0=&fiu0; fiu1=&fiu3; fiu2=&fiux;
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For NPCM8xx: fiu0=&fiu0; fiu1=&fiu3; fiu2=&fiux; fiu3=&fiu1;
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properties:
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compatible:
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enum:
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- nuvoton,npcm750-fiu # Poleg NPCM7XX
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- nuvoton,npcm845-fiu # Arbel NPCM8XX
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reg:
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description:
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The first resource is the FIU control register block. An optional second
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resource describes the direct-mapped flash window used for direct
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read/write accesses.
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minItems: 1
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items:
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- description: FIU control registers
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- description: Memory-mapped flash contents
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reg-names:
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description:
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Resource names for the control registers and optional direct-mapped
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flash window.
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minItems: 1
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items:
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- const: control
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- const: memory
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clocks:
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maxItems: 1
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description: FIU reference clock.
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nuvoton,spix-mode:
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type: boolean
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description: Enable SPIX mode for an expansion bus to an ASIC or CPLD.
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required:
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- compatible
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- reg
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- reg-names
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- clocks
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
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spi@fb000000 {
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compatible = "nuvoton,npcm750-fiu";
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reg = <0xfb000000 0x1000>, <0x80000000 0x10000000>;
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reg-names = "control", "memory";
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&clk NPCM7XX_CLK_SPI0>;
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flash@0 {
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compatible = "jedec,spi-nor";
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reg = <0>;
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#address-cells = <1>;
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#size-cells = <1>;
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};
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};
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