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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
maintainers:
- Erwan Le Ray <erwan.leray@st.com>
title: STMicroelectronics STM32 USART bindings
allOf:
- $ref: rs485.yaml
properties:
compatible:
enum:
- st,stm32-uart
- st,stm32f7-uart
- st,stm32h7-uart
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
maxItems: 1
resets:
maxItems: 1
label:
description: label associated with this uart
st,hw-flow-ctrl:
description: enable hardware flow control
$ref: /schemas/types.yaml#/definitions/flag
dmas:
minItems: 1
maxItems: 2
dma-names:
items:
enum: [ rx, tx ]
minItems: 1
maxItems: 2
cts-gpios:
maxItems: 1
rts-gpios:
maxItems: 1
wakeup-source: true
rs485-rts-delay: true
rs485-rts-active-low: true
linux,rs485-enabled-at-boot-time: true
rs485-rx-during-tx: true
if:
required:
- st,hw-flow-ctrl
then:
properties:
cts-gpios: false
rts-gpios: false
required:
- compatible
- reg
- interrupts
- clocks
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/stm32mp1-clks.h>
usart1: serial@40011000 {
compatible = "st,stm32-uart";
reg = <0x40011000 0x400>;
interrupts = <37>;
clocks = <&rcc 0 164>;
dmas = <&dma2 2 4 0x414 0x0>,
<&dma2 7 4 0x414 0x0>;
dma-names = "rx", "tx";
rs485-rts-active-low;
};
...
|
