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37bb4033e4
Change spi-rx-bus-width and spi-tx-bus-width properties from single uint32 values to arrays of uint32 values. This allows describing SPI peripherals connected to controllers that have multiple data lanes for receiving or transmitting two or more words in parallel. Each index in the array corresponds to a physical data lane (one or more wires depending on the bus width). Additional mapping properties will be needed in cases where a lane on the controller or peripheral is skipped. Bindings that make use of this property are updated in the same commit to avoid validation errors. The adi,ad4030 binding can now better describe the chips multi-lane capabilities, so that binding is refined and gets a new example. Converting from single uint32 to array of uint32 does not break .dts/ .dtb files since there is no difference between specifying a single uint32 value and an array with a single uint32 value in devicetree. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Reviewed-by: Marcelo Schmitt <marcelo.schmitt@analog.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Signed-off-by: David Lechner <dlechner@baylibre.com> Link: https://patch.msgid.link/20260123-spi-add-multi-bus-support-v6-1-12af183c06eb@baylibre.com Signed-off-by: Mark Brown <broonie@kernel.org>
87 lines
1.4 KiB
YAML
87 lines
1.4 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/spi/allwinner,sun4i-a10-spi.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A10 SPI Controller
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allOf:
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- $ref: spi-controller.yaml
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <mripard@kernel.org>
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properties:
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compatible:
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const: allwinner,sun4i-a10-spi
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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items:
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- description: Bus Clock
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- description: Module Clock
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clock-names:
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items:
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- const: ahb
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- const: mod
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dmas:
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items:
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- description: RX DMA Channel
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- description: TX DMA Channel
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dma-names:
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items:
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- const: rx
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- const: tx
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patternProperties:
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"^.*@[0-9a-f]+":
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type: object
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additionalProperties: true
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properties:
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reg:
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items:
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minimum: 0
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maximum: 4
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spi-rx-bus-width:
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items:
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- const: 1
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spi-tx-bus-width:
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items:
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- const: 1
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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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- clock-names
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unevaluatedProperties: false
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examples:
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- |
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spi1: spi@1c06000 {
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compatible = "allwinner,sun4i-a10-spi";
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reg = <0x01c06000 0x1000>;
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interrupts = <11>;
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clocks = <&ahb_gates 21>, <&spi1_clk>;
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clock-names = "ahb", "mod";
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#address-cells = <1>;
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#size-cells = <0>;
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};
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...
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