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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 bindings
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@st.com>
- Fabrice Gasnier <fabrice.gasnier@st.com>
allOf:
- $ref: "spi-controller.yaml#"
- if:
properties:
compatible:
contains:
const: st,stm32f4-spi
then:
properties:
st,spi-midi-ns: false
properties:
compatible:
enum:
- st,stm32f4-spi
- st,stm32h7-spi
reg:
maxItems: 1
clocks:
maxItems: 1
interrupts:
maxItems: 1
resets:
maxItems: 1
dmas:
description: |
DMA specifiers for tx and rx dma. DMA fifo mode must be used. See
the STM32 DMA bindings Documentation/devicetree/bindings/dma/stm32-dma.txt.
items:
- description: rx DMA channel
- description: tx DMA channel
dma-names:
items:
- const: rx
- const: tx
patternProperties:
"^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$":
type: object
# SPI slave nodes must be children of the SPI master node and can
# contain the following properties.
properties:
st,spi-midi-ns:
description: |
Only for STM32H7, (Master Inter-Data Idleness) minimum time
delay in nanoseconds inserted between two consecutive data frames.
required:
- compatible
- reg
- clocks
- interrupts
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>;
aardvark@0 {
compatible = "totalphase,aardvark";
reg = <0>;
spi-max-frequency = <4000000>;
st,spi-midi-ns = <4000>;
};
};
...
|
