title: STMicroelectronics STM32 USART bindings
-allOf:
- - $ref: rs485.yaml
-
properties:
compatible:
enum:
uart-has-rtscts: true
+ rx-tx-swap: true
+
dmas:
minItems: 1
maxItems: 2
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
+ 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
- |
#include <dt-bindings/clock/stm32mp1-clks.h>
usart1: serial@40011000 {
- compatible = "st,stm32-uart";
+ 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;
};