serial: sirf: add DT-binding document to describle detailed properties
we defined some special properties for hardware flow control, document them for DT-binding. Signed-off-by: Qipan Li <Qipan.Li@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
2eb5618de8
commit
1ef39808ca
33
Documentation/devicetree/bindings/tty/serial/sirf-uart.txt
Normal file
33
Documentation/devicetree/bindings/tty/serial/sirf-uart.txt
Normal file
|
@ -0,0 +1,33 @@
|
|||
* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter *
|
||||
|
||||
Required properties:
|
||||
- compatible : Should be "sirf,prima2-uart" or "sirf, prima2-usp-uart"
|
||||
- reg : Offset and length of the register set for the device
|
||||
- interrupts : Should contain uart interrupt
|
||||
- fifosize : Should define hardware rx/tx fifo size
|
||||
- clocks : Should contain uart clock number
|
||||
|
||||
Optional properties:
|
||||
- sirf,uart-has-rtscts: we have hardware flow controller pins in hardware
|
||||
- rts-gpios: RTS pin for USP-based UART if sirf,uart-has-rtscts is true
|
||||
- cts-gpios: CTS pin for USP-based UART if sirf,uart-has-rtscts is true
|
||||
|
||||
Example:
|
||||
|
||||
uart0: uart@b0050000 {
|
||||
cell-index = <0>;
|
||||
compatible = "sirf,prima2-uart";
|
||||
reg = <0xb0050000 0x1000>;
|
||||
interrupts = <17>;
|
||||
fifosize = <128>;
|
||||
clocks = <&clks 13>;
|
||||
};
|
||||
|
||||
On the board-specific dts, we can put rts-gpios and cts-gpios like
|
||||
|
||||
usp@b0090000 {
|
||||
compatible = "sirf,prima2-usp-uart";
|
||||
sirf,uart-has-rtscts;
|
||||
rts-gpios = <&gpio 15 0>;
|
||||
cts-gpios = <&gpio 46 0>;
|
||||
};
|
Loading…
Reference in a new issue