diff options
Diffstat (limited to 'Documentation/devicetree/bindings/serial/st,stm32-uart.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/st,stm32-uart.yaml | 70 |
1 files changed, 58 insertions, 12 deletions
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml index 238c44192d31..1df8ffe95fc6 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml @@ -5,12 +5,9 @@ $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> + - Erwan Le Ray <erwan.leray@foss.st.com> -title: STMicroelectronics STM32 USART bindings - -allOf: - - $ref: rs485.yaml +title: STMicroelectronics STM32 USART properties: compatible: @@ -35,9 +32,11 @@ properties: description: label associated with this uart st,hw-flow-ctrl: - description: enable hardware flow control + description: enable hardware flow control (deprecated) $ref: /schemas/types.yaml#/definitions/flag + rx-tx-swap: true + dmas: minItems: 1 maxItems: 2 @@ -48,12 +47,57 @@ properties: 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 - rs485-rts-delay: true - rs485-rts-active-low: true - linux,rs485-enabled-at-boot-time: true - rs485-rx-during-tx: 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 @@ -61,19 +105,21 @@ required: - interrupts - clocks -additionalProperties: false +unevaluatedProperties: false examples: - | #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; }; |