Rob,
On 11/22/2015 02:56 PM, Rob Herring wrote:
> 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.
>
Ack. In addition, will replace all instances of USART with UART.
>> +- 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
Agreed. microchip,uart-has-rtscts will be dropped and it turns out we don't really need the rtc-gpios property.
Josh
>
>> +
>> +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
>>
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