[PATCH v3 2/7] Documentation: dt: Add binding info for jz4740-rtc driver

[Paul Cercueil]

This commit adds documentation for the device-tree bindings of the
jz4740-rtc driver, which supports the RTC unit present in the JZ4740 and
JZ4780 SoCs from Ingenic.

Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Acked-by: Maarten ter Huurne <maarten@xxxxxxxxxxxxxx>
---
 .../devicetree/bindings/rtc/ingenic,jz4740-rtc.txt | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/ingenic,jz4740-rtc.txt

v2:
- Remove 'interrupt-parent' of the list of required properties
- Add the -msec suffix for the DT entries that represent time

v3:
- Replace the -msec suffix by -ms
- Change the register area size from 0x3F to 0x40

diff --git a/Documentation/devicetree/bindings/rtc/ingenic,jz4740-rtc.txt b/Documentation/devicetree/bindings/rtc/ingenic,jz4740-rtc.txt
new file mode 100644
index 0000000..df97594
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/ingenic,jz4740-rtc.txt
@@ -0,0 +1,37 @@
+JZ4740 and similar SoCs real-time clock driver
+
+Required properties:
+
+- compatible: One of:
+  - "ingenic,jz4740-rtc" - for use with the JZ4740 SoC
+  - "ingenic,jz4780-rtc" - for use with the JZ4780 SoC
+- reg: Address range of rtc register set
+- interrupts: IRQ number for the alarm interrupt
+- clocks: phandle to the "rtc" clock
+- clock-names: must be "rtc"
+
+Optional properties:
+- system-power-controller: To use this component as the
+  system power controller
+- reset-pin-assert-time-ms: Reset pin low-level assertion
+  time after wakeup (default 60ms; range 0-125ms if RTC clock
+  at 32 kHz)
+- min-wakeup-pin-assert-time-ms: Minimum wakeup pin assertion
+  time (default 100ms; range 0-2s if RTC clock at 32 kHz)
+
+Example:
+
+rtc@10003000 {
+	compatible = "ingenic,jz4740-rtc";
+	reg = <0x10003000 0x40>;
+
+	interrupt-parent = <&intc>;
+	interrupts = <32>;
+
+	clocks = <&rtc_clock>;
+	clock-names = "rtc";
+
+	system-power-controller;
+	reset-pin-assert-time-ms = <60>;
+	min-wakeup-pin-assert-time-ms = <100>;
+};
-- 
2.9.3