| # SPDX-License-Identifier: GPL-2.0 |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/spi/spi-sifive.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: SiFive SPI controller |
| |
| maintainers: |
| - Pragnesh Patel <pragnesh.patel@sifive.com> |
| - Paul Walmsley <paul.walmsley@sifive.com> |
| - Palmer Dabbelt <palmer@sifive.com> |
| |
| allOf: |
| - $ref: "spi-controller.yaml#" |
| |
| properties: |
| compatible: |
| items: |
| - const: sifive,fu540-c000-spi |
| - const: sifive,spi0 |
| |
| description: |
| Should be "sifive,<chip>-spi" and "sifive,spi<version>". |
| Supported compatible strings are - |
| "sifive,fu540-c000-spi" for the SiFive SPI v0 as integrated |
| onto the SiFive FU540 chip, and "sifive,spi0" for the SiFive |
| SPI v0 IP block with no chip integration tweaks. |
| Please refer to sifive-blocks-ip-versioning.txt for details |
| |
| SPI RTL that corresponds to the IP block version numbers can be found here - |
| https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/spi |
| |
| reg: |
| maxItems: 1 |
| |
| description: |
| Physical base address and size of SPI registers map |
| A second (optional) range can indicate memory mapped flash |
| |
| interrupts: |
| maxItems: 1 |
| |
| clocks: |
| maxItems: 1 |
| |
| description: |
| Must reference the frequency given to the controller |
| |
| sifive,fifo-depth: |
| description: |
| Depth of hardware queues; defaults to 8 |
| allOf: |
| - $ref: "/schemas/types.yaml#/definitions/uint32" |
| - enum: [ 8 ] |
| - default: 8 |
| |
| sifive,max-bits-per-word: |
| description: |
| Maximum bits per word; defaults to 8 |
| allOf: |
| - $ref: "/schemas/types.yaml#/definitions/uint32" |
| - enum: [ 0, 1, 2, 3, 4, 5, 6, 7, 8 ] |
| - default: 8 |
| |
| required: |
| - compatible |
| - reg |
| - interrupts |
| - clocks |
| |
| examples: |
| - | |
| spi: spi@10040000 { |
| compatible = "sifive,fu540-c000-spi", "sifive,spi0"; |
| reg = <0x0 0x10040000 0x0 0x1000 0x0 0x20000000 0x0 0x10000000>; |
| interrupt-parent = <&plic>; |
| interrupts = <51>; |
| clocks = <&tlclk>; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| sifive,fifo-depth = <8>; |
| sifive,max-bits-per-word = <8>; |
| }; |
| |
| ... |