Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3fa047fd authored by Alexandre TORGUE's avatar Alexandre TORGUE Committed by Greg Kroah-Hartman
Browse files

dt-bindings: Add DMA bindings for STM32 USART 



Signed-off-by: default avatarGerald Baeza <gerald.baeza@st.com>
Signed-off-by: default avatarAlexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 511c7b1b

Documentation/devicetree/bindings/serial/st,stm32-usart.txt

+12 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ stm32(f4) or stm32f7. 
Optional properties:

- pinctrl: The reference on the pins configuration

- st,hw-flow-ctrl: bool flag to enable hardware flow control.

- dmas: phandle(s) to DMA controller node(s). Refer to stm32-dma.txt

- dma-names: "rx" and/or "tx"



Examples:

usart4: serial@40004c00 {
@@ -32,3 +34,13 @@ usart2: serial@40004400 { 
	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;

};



usart1: serial@40011000 {

	compatible = "st,stm32-usart", "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";

};