On Tue, Apr 7, 2015 at 11:30 AM, Maxime Coquelin
<mcoquelin.stm32@xxxxxxxxx> wrote:
> This adds documentation of device tree bindings for the
> STM32 USART
>
> Tested-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
> ---
> .../devicetree/bindings/serial/st,stm32-usart.txt | 32 ++++++++++++++++++++++
> 1 file changed, 32 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/serial/st,stm32-usart.txt
>
> diff --git a/Documentation/devicetree/bindings/serial/st,stm32-usart.txt b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt
> new file mode 100644
> index 0000000..8480a76
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/st,stm32-usart.txt
> @@ -0,0 +1,32 @@
> +* STMicroelectronics STM32 USART
> +
> +Required properties:
> +- compatible: Can be either "st,stm32-usart" or "st,stm32-uart" depending on
> +whether the device supports synchronous mode.
> +- reg: The address and length of the peripheral registers space
> +- interrupts: The interrupt line of the USART instance
> +- clocks: The input clock of the USART instance
> +
> +Optional properties:
> +- pinctrl: The reference on the pins configuration
> +- auto-flow-control: bool flag to enable hardware flow control.
> +
> +Examples:
> +usart4: serial@40004c00 {
> + compatible = "st,stm32-uart";
> + reg = <0x40004c00 0x400>;
> + interrupts = <52>;
> + clocks = <&clk_pclk1>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usart4>;
> +};
> +
> +usart2: serial@40004400 {
> + compatible = "st,stm32-usart", "st,stm32-uart";
> + reg = <0x40004400 0x400>;
> + interrupts = <38>;
> + clocks = <&clk_pclk1>;
> + auto-flow-control;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;
> +};
> --
> 1.9.1
>
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