Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / rtc / atmel,at91sam9-rtc.txt

diff --git a/kernel/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt b/kernel/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
new file mode 100644 (file)
index 0000000..6ae79d1
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
@@ -0,0 +1,23 @@
+Atmel AT91SAM9260 Real Time Timer
+
+Required properties:
+- compatible: should be: "atmel,at91sam9260-rtt"
+- reg: should encode the memory region of the RTT controller
+- interrupts: rtt alarm/event interrupt
+- clocks: should contain the 32 KHz slow clk that will drive the RTT block.
+- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store
+       the time base when the RTT is used as an RTC.
+       The first cell should point to the GPBR node and the second one
+       encode the offset within the GPBR block (or in other words, the
+       GPBR register used to store the time base).
+
+
+Example:
+
+rtt@fffffd20 {
+       compatible = "atmel,at91sam9260-rtt";
+       reg = <0xfffffd20 0x10>;
+       interrupts = <1 4 7>;
+       clocks = <&clk32k>;
+       atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
+};