127 lines
2.5 KiB
YAML
127 lines
2.5 KiB
YAML
|
# 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@foss.st.com>
|
||
|
|
|
||
|
|
title: STMicroelectronics STM32 USART
|
||
|
|
|
||
|
|
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 (deprecated)
|
||
|
|
$ref: /schemas/types.yaml#/definitions/flag
|
||
|
|
|
||
|
|
rx-tx-swap: true
|
||
|
|
|
||
|
|
dmas:
|
||
|
|
minItems: 1
|
||
|
|
maxItems: 2
|
||
|
|
|
||
|
|
dma-names:
|
||
|
|
items:
|
||
|
|
enum: [ rx, tx ]
|
||
|
|
minItems: 1
|
||
|
|
maxItems: 2
|
||
|
|
|
||
|
|
# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts'
|
||
|
|
# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow
|
||
|
|
# control instead of dedicated pins.
|
||
|
|
#
|
||
|
|
# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or
|
||
|
|
# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design.
|
||
|
|
cts-gpios: true
|
||
|
|
rts-gpios: true
|
||
|
|
|
||
|
|
wakeup-source: true
|
||
|
|
|
||
|
|
rx-threshold:
|
||
|
|
description:
|
||
|
|
If value is set to 1, RX FIFO threshold is disabled.
|
||
|
|
enum: [1, 2, 4, 8, 12, 14, 16]
|
||
|
|
default: 8
|
||
|
|
|
||
|
|
tx-threshold:
|
||
|
|
description:
|
||
|
|
If value is set to 1, TX FIFO threshold is disabled.
|
||
|
|
enum: [1, 2, 4, 8, 12, 14, 16]
|
||
|
|
default: 8
|
||
|
|
|
||
|
|
allOf:
|
||
|
|
- $ref: rs485.yaml#
|
||
|
|
- $ref: serial.yaml#
|
||
|
|
- if:
|
||
|
|
required:
|
||
|
|
- st,hw-flow-ctrl
|
||
|
|
then:
|
||
|
|
properties:
|
||
|
|
cts-gpios: false
|
||
|
|
rts-gpios: false
|
||
|
|
- if:
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
const: st,stm32-uart
|
||
|
|
then:
|
||
|
|
properties:
|
||
|
|
rx-tx-swap: false
|
||
|
|
- if:
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
contains:
|
||
|
|
enum:
|
||
|
|
- st,stm32-uart
|
||
|
|
- st,stm32f7-uart
|
||
|
|
then:
|
||
|
|
properties:
|
||
|
|
rx-threshold: false
|
||
|
|
tx-threshold: false
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- reg
|
||
|
|
- interrupts
|
||
|
|
- clocks
|
||
|
|
|
||
|
|
unevaluatedProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
#include <dt-bindings/clock/stm32mp1-clks.h>
|
||
|
|
usart1: serial@40011000 {
|
||
|
|
compatible = "st,stm32h7-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";
|
||
|
|
rx-threshold = <4>;
|
||
|
|
tx-threshold = <4>;
|
||
|
|
rs485-rts-active-low;
|
||
|
|
};
|
||
|
|
|
||
|
|
...
|