102 lines
2.4 KiB
YAML
102 lines
2.4 KiB
YAML
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# 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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$id: http://devicetree.org/schemas/spi/st,stm32-spi.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectronics STM32 SPI Controller bindings
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description: |
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The STM32 SPI controller is used to communicate with external devices using
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the Serial Peripheral Interface. It supports full-duplex, half-duplex and
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simplex synchronous serial communication with external devices. It supports
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from 4 to 32-bit data size.
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maintainers:
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- Erwan Leray <erwan.leray@foss.st.com>
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- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
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allOf:
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- $ref: "spi-controller.yaml#"
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- if:
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properties:
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compatible:
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contains:
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const: st,stm32f4-spi
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then:
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properties:
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st,spi-midi-ns: false
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properties:
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compatible:
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enum:
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- st,stm32f4-spi
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- st,stm32h7-spi
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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interrupts:
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maxItems: 1
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resets:
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maxItems: 1
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dmas:
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description: |
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DMA specifiers for tx and rx dma. DMA fifo mode must be used. See
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the STM32 DMA bindings Documentation/devicetree/bindings/dma/st,stm32-dma.yaml.
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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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"^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$":
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type: object
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# SPI slave nodes must be children of the SPI master node and can
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# contain the following properties.
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properties:
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st,spi-midi-ns:
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description: |
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Only for STM32H7, (Master Inter-Data Idleness) minimum time
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delay in nanoseconds inserted between two consecutive data frames.
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required:
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- compatible
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- reg
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- clocks
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- interrupts
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/clock/stm32mp1-clks.h>
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#include <dt-bindings/reset/stm32mp1-resets.h>
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spi@4000b000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "st,stm32h7-spi";
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reg = <0x4000b000 0x400>;
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interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&rcc SPI2_K>;
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resets = <&rcc SPI2_R>;
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dmas = <&dmamux1 0 39 0x400 0x05>,
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<&dmamux1 1 40 0x400 0x05>;
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dma-names = "rx", "tx";
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cs-gpios = <&gpioa 11 0>;
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};
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...
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