On Fri, Nov 20, 2015 at 05:17:21PM -0700, Joshua Henderson wrote:
> From: Andrei Pistirica <andrei.pistirica@xxxxxxxxxxxxx>
>
> Document the devicetree bindings for the USART peripheral found on
> Microchip PIC32 class devices.
>
> Signed-off-by: Andrei Pistirica <andrei.pistirica@xxxxxxxxxxxxx>
> Signed-off-by: Joshua Henderson <joshua.henderson@xxxxxxxxxxxxx>
> ---
> .../bindings/serial/microchip,pic32-usart.txt | 29 ++++++++++++++++++++
> 1 file changed, 29 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/serial/microchip,pic32-usart.txt
>
> diff --git a/Documentation/devicetree/bindings/serial/microchip,pic32-usart.txt b/Documentation/devicetree/bindings/serial/microchip,pic32-usart.txt
> new file mode 100644
> index 0000000..c87321c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/microchip,pic32-usart.txt
> @@ -0,0 +1,29 @@
> +* Microchip Universal Synchronous Asynchronous Receiver/Transmitter (USART)
> +
> +Required properties:
> +- compatible: Should be "microchip,pic32-usart"
Again, should be more specific.
> +- reg: Should contain registers location and length
> +- interrupts: Should contain interrupt
> +- pinctrl: Should contain pinctrl for TX/RX/RTS/CTS
> +
> +Optional properties:
> +- microchip,uart-has-rtscts : Indicate the uart has hardware flow control
> +- rts-gpios: RTS pin for USP-based UART if microchip,uart-has-rtscts
> +- cts-gpios: CTS pin for USP-based UART if microchip,uart-has-rtscts
This appears to just be copied for Sirf UART.
Doesn't *-gpios being present imply having h/w
flow-control (i.e. microchip,uart-has-rtscts)?
Rob
> +
> +Example:
> + usart0: serial@1f822000 {
> + compatible = "microchip,pic32-usart";
> + reg = <0x1f822000 0x50>;
> + interrupts = <UART1_FAULT DEFAULT_INT_PRI IRQ_TYPE_NONE>,
> + <UART1_RECEIVE_DONE DEFAULT_INT_PRI IRQ_TYPE_NONE>,
> + <UART1_TRANSFER_DONE DEFAULT_INT_PRI IRQ_TYPE_NONE>;
> + pinctrl-names = "default";
> + pinctrl-0 = <
> + &pinctrl_uart1
> + &pinctrl_uart1_cts
> + &pinctrl_uart1_rts>;
> + microchip,uart-has-rtscts;
> + cts-gpios = <&pioB 15 0>;
> + rts-gpios = <&pioD 1 0>;
> + };
> --
> 1.7.9.5
>
