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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/st,stm32-spi.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 SPI Controller
description: |
The STM32 SPI controller is used to communicate with external devices using
the Serial Peripheral Interface. It supports full-duplex, half-duplex and
simplex synchronous serial communication with external devices. It supports
from 4 to 32-bit data size.
maintainers:
- Erwan Leray <erwan.leray@foss.st.com>
- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
allOf:
- $ref: spi-controller.yaml#
- if:
properties:
compatible:
contains:
const: st,stm32f4-spi
then:
properties:
st,spi-midi-ns: false
sram: false
dmas:
maxItems: 2
dma-names:
items:
- const: rx
- const: tx
- if:
properties:
compatible:
contains:
const: st,stm32mp25-spi
then:
properties:
sram: false
dmas:
maxItems: 2
dma-names:
items:
- const: rx
- const: tx
properties:
compatible:
enum:
- st,stm32f4-spi
- st,stm32f7-spi
- st,stm32h7-spi
- st,stm32mp25-spi
reg:
maxItems: 1
clocks:
maxItems: 1
interrupts:
maxItems: 1
resets:
maxItems: 1
dmas:
description: |
DMA specifiers for tx and rx channels. DMA fifo mode must be used. See
the STM32 DMA bindings Documentation/devicetree/bindings/dma/stm32/st,*dma.yaml
minItems: 2
items:
- description: rx DMA channel
- description: tx DMA channel
- description: rxm2m MDMA channel
dma-names:
minItems: 2
items:
- const: rx
- const: tx
- const: rxm2m
sram:
maxItems: 1
description:
SRAM region which is used as temporary storage memory between DMA and
MDMA engines.
power-domains:
maxItems: 1
access-controllers:
minItems: 1
maxItems: 2
required:
- compatible
- reg
- clocks
- interrupts
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/stm32mp1-clks.h>
#include <dt-bindings/reset/stm32mp1-resets.h>
spi@4000b000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "st,stm32h7-spi";
reg = <0x4000b000 0x400>;
interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc SPI2_K>;
resets = <&rcc SPI2_R>;
dmas = <&dmamux1 0 39 0x400 0x05>,
<&dmamux1 1 40 0x400 0x05>;
dma-names = "rx", "tx";
cs-gpios = <&gpioa 11 0>;
};
...
|
