Bindings/spi/st,stm32-spi.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/spi/st,stm32-spi.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: STMicroelectronics STM32 SPI Controller
   8
   9 description: |
  10   The STM32 SPI controller is used to communicate with external devices using
  11   the Serial Peripheral Interface. It supports full-duplex, half-duplex and
  12   simplex synchronous serial communication with external devices. It supports
  13   from 4 to 32-bit data size.
  14
  15 maintainers:
  16   - Erwan Leray <erwan.leray@foss.st.com>
  17   - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
  18
  19 allOf:
  20   - $ref: spi-controller.yaml#
  21
  22 properties:
  23   compatible:
  24     enum:
  25       - st,stm32f4-spi
  26       - st,stm32h7-spi
  27
  28   reg:
  29     maxItems: 1
  30
  31   clocks:
  32     maxItems: 1
  33
  34   interrupts:
  35     maxItems: 1
  36
  37   resets:
  38     maxItems: 1
  39
  40   dmas:
  41     description: |
  42       DMA specifiers for tx and rx dma. DMA fifo mode must be used. See
  43       the STM32 DMA bindings Documentation/devicetree/bindings/dma/st,stm32-dma.yaml.
  44     items:
  45       - description: rx DMA channel
  46       - description: tx DMA channel
  47
  48   dma-names:
  49     items:
  50       - const: rx
  51       - const: tx
  52
  53 required:
  54   - compatible
  55   - reg
  56   - clocks
  57   - interrupts
  58
  59 unevaluatedProperties: false
  60
  61 examples:
  62   - |
  63     #include <dt-bindings/interrupt-controller/arm-gic.h>
  64     #include <dt-bindings/clock/stm32mp1-clks.h>
  65     #include <dt-bindings/reset/stm32mp1-resets.h>
  66     spi@4000b000 {
  67         #address-cells = <1>;
  68         #size-cells = <0>;
  69         compatible = "st,stm32h7-spi";
  70         reg = <0x4000b000 0x400>;
  71         interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
  72         clocks = <&rcc SPI2_K>;
  73         resets = <&rcc SPI2_R>;
  74         dmas = <&dmamux1 0 39 0x400 0x05>,
  75                <&dmamux1 1 40 0x400 0x05>;
  76         dma-names = "rx", "tx";
  77         cs-gpios = <&gpioa 11 0>;
  78     };
  79
  80 ...