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Diffstat (limited to 'Documentation/devicetree/bindings/serial/sirf-uart.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/sirf-uart.txt | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt new file mode 100644 index 000000000..f0c39261c --- /dev/null +++ b/Documentation/devicetree/bindings/serial/sirf-uart.txt @@ -0,0 +1,47 @@ +* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter * + +Required properties: +- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart", + "sirf,atlas7-uart" or "sirf,atlas7-bt-uart" which means + uart located in BT module and used for BT. +- 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>; +}; + +for uart use in BT module, +uart6: uart@11000000 { + cell-index = <6>; + compatible = "sirf,atlas7-bt-uart", "sirf,atlas7-uart"; + reg = <0x11000000 0x1000>; + interrupts = <0 100 0>; + clocks = <&clks 138>, <&clks 140>, <&clks 141>; + clock-names = "uart", "general", "noc"; + fifosize = <128>; + status = "disabled"; +} |