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-rw-r--r--Documentation/devicetree/bindings/serial/mtk-uart.txt13
1 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/serial/mtk-uart.txt b/Documentation/devicetree/bindings/serial/mtk-uart.txt
index c6b5262eb352..6fdffb735fb9 100644
--- a/Documentation/devicetree/bindings/serial/mtk-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mtk-uart.txt
@@ -23,7 +23,12 @@ Required properties:
- reg: The base address of the UART register bank.
-- interrupts: A single interrupt specifier.
+- interrupts:
+ index 0: an interrupt specifier for the UART controller itself
+ index 1: optional, an interrupt specifier with edge sensitivity on Rx pin to
+ support Rx in-band wake up. If one would like to use this feature,
+ one must create an addtional pinctrl to reconfigure Rx pin to normal
+ GPIO before suspend.
- clocks : Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
@@ -39,7 +44,11 @@ Example:
uart0: serial@11006000 {
compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";
reg = <0x11006000 0x400>;
- interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>;
+ interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>;
clocks = <&uart_clk>, <&bus_clk>;
clock-names = "baud", "bus";
+ pinctrl-names = "default", "sleep";
+ pinctrl-0 = <&uart_pin>;
+ pinctrl-1 = <&uart_pin_sleep>;
};