new file mode 100644
@@ -0,0 +1,27 @@
+Spreadtrum SC27xx Real Time Clock
+
+Required properties:
+- compatible: should be "sprd,sc2731-rtc".
+- reg: address offset of rtc register.
+- interrupt-parent: phandle for the interrupt controller.
+- interrupts: rtc alarm interrupt.
+
+Example:
+
+ sc2731_pmic: pmic@0 {
+ compatible = "sprd,sc2731";
+ reg = <0>;
+ spi-max-frequency = <26000000>;
+ interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rtc@280 {
+ compatible = "sprd,sc2731-rtc";
+ reg = <0x280>;
+ interrupt-parent = <&sc2731_pmic>;
+ interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+ };
+ };
This patch adds the binding documentation for Spreadtrum SC27xx series RTC device. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> --- Changes since v1: - Use a specific chip name as compatible string. - Remove useless alias. - Add the parent MFD node. --- .../devicetree/bindings/rtc/sprd,sc27xx-rtc.txt | 27 ++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/sprd,sc27xx-rtc.txt