Add the documentation for the device tree binding of meson_uart
Signed-off-by: Helmut Klein <hgkr.kl...@gmail.com>
---
.../bindings/serial/amlogic,meson_uart.txt | 30 ++++++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644
Documentation/devicetree/bindings/serial/amlogic,meson_uart.txt
diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson_uart.txt
b/Documentation/devicetree/bindings/serial/amlogic,meson_uart.txt
new file mode 100644
index 000000000000..8250a191c2fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/amlogic,meson_uart.txt
@@ -0,0 +1,30 @@
+* Amlogic Meson UART, used in multiple SoCs (e.g. S905, s905X, ...)
+
+Required properties:
+- compatible : "amlogic,meson-uart"
+- reg : offset and length of the register set for the device.
+- interrupts : device interrupt
+- clocks : a list of phandle + clock-specifier pairs, one for each
+ entry in clock names.
+- clocks-names : contains:
+ * "xtal" for the baud rate clock
+ * "core" for the core clock of none AO UARTs (optional)
+
+e.g.
+uart_A: serial@84c0 {
+ compatible = "amlogic,meson-uart";
+ reg = <0x0 0x84c0 0x0 0x14>;
+ pinctrl-0 = <&uart_a_pins &uart_a_cts_rts_pins>;
+ interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
+ clocks = <&xtal>, <&clkc CLKID_UART0>;
+ clock-names = "xtal", "core";
+ status = "ok";
+};
+
+Note: Each port should have an alias correctly numbered in "aliases" node.
+
+e.g.
+aliases {
+ serial0 = &uart_AO;
+ serial1 = &uart_A;
+};
--
2.11.0
