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87 lines
2.1 KiB
87 lines
2.1 KiB
# SPDX-License-Identifier: GPL-2.0 |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/spi/spi-sifive.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: SiFive SPI controller |
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maintainers: |
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- Pragnesh Patel <[email protected]> |
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- Paul Walmsley <[email protected]> |
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- Palmer Dabbelt <[email protected]> |
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allOf: |
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- $ref: "spi-controller.yaml#" |
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properties: |
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compatible: |
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items: |
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- enum: |
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- sifive,fu540-c000-spi |
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- sifive,fu740-c000-spi |
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- const: sifive,spi0 |
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description: |
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Should be "sifive,<chip>-spi" and "sifive,spi<version>". |
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Supported compatible strings are - |
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"sifive,fu540-c000-spi" and "sifive,fu740-c000-spi" for the SiFive SPI v0 |
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as integrated onto the SiFive FU540 and FU740 chip resp, and "sifive,spi0" |
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for the SiFive SPI v0 IP block with no chip integration tweaks. |
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Please refer to sifive-blocks-ip-versioning.txt for details |
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SPI RTL that corresponds to the IP block version numbers can be found here - |
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https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/spi |
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reg: |
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minItems: 1 |
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items: |
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- description: SPI registers region |
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- description: Memory mapped flash region |
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interrupts: |
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maxItems: 1 |
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clocks: |
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maxItems: 1 |
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description: |
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Must reference the frequency given to the controller |
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sifive,fifo-depth: |
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description: |
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Depth of hardware queues; defaults to 8 |
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$ref: "/schemas/types.yaml#/definitions/uint32" |
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enum: [8] |
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default: 8 |
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sifive,max-bits-per-word: |
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description: |
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Maximum bits per word; defaults to 8 |
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$ref: "/schemas/types.yaml#/definitions/uint32" |
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enum: [0, 1, 2, 3, 4, 5, 6, 7, 8] |
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default: 8 |
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required: |
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- compatible |
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- reg |
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- interrupts |
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- clocks |
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unevaluatedProperties: false |
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examples: |
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- | |
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spi: spi@10040000 { |
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compatible = "sifive,fu540-c000-spi", "sifive,spi0"; |
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reg = <0x10040000 0x1000>, <0x20000000 0x10000000>; |
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interrupt-parent = <&plic>; |
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interrupts = <51>; |
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clocks = <&tlclk>; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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sifive,fifo-depth = <8>; |
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sifive,max-bits-per-word = <8>; |
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}; |
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...
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