File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt
new file mode 100644
index 0000000..2d47add
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/mtk-uart.txt
@@ -0,0 +1,36 @@
+* Mediatek Universal Asynchronous Receiver/Transmitter (UART)
+
+Required properties:
+- compatible should contain:
+ * "mediatek,mt8135-uart" for MT8135 compatible UARTS
+ * "mediatek,mt8127-uart" for MT8127 compatible UARTS
+ * "mediatek,mt8173-uart" for MT8173 compatible UARTS
+ * "mediatek,mt6795-uart" for MT6795 compatible UARTS
+ * "mediatek,mt6589-uart" for MT6589 compatible UARTS
+ * "mediatek,mt6582-uart" for MT6582 compatible UARTS
+ * "mediatek,mt6580-uart" for MT6580 compatible UARTS
+ * "mediatek,mt6577-uart" for all compatible UARTS (MT8173, MT6795,
+ MT6589, MT6582, MT6580, MT6577)
+
+- reg: The base address of the UART register bank.
+
+- interrupts: A single interrupt specifier.
+
+- clocks : Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names:
+ - "baud": The clock the baudrate is derived from
+ - "bus": The bus clock for register accesses (optional)
+
+For compatibility with older device trees an unnamed clock is used for the
+baud clock if the baudclk does not exist. Do not use this for new designs.
+
+Example:
+
+ uart0: serial@11006000 {
+ compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";
+ reg = <0x11006000 0x400>;
+ interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>;
+ clocks = <&uart_clk>, <&bus_clk>;
+ clock-names = "baud", "bus";
+ };