[rtc-linux] [PATCH 1/2] Documentation: devicetree: add epson rx6110 binding

[Steffen Trumtrar <s.trumtrar@pengutronix.de>]

Add the binding documentation for the Epson RX6110 RTC.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
I'm not sure what the current policy for such simple SPI bindings is.
Are they necessary?

 .../devicetree/bindings/rtc/epson,rtc-rx6110.txt   | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/epson,rtc-rx6110.txt

diff --git a/Documentation/devicetree/bindings/rtc/epson,rtc-rx6110.txt b/Documentation/devicetree/bindings/rtc/epson,rtc-rx6110.txt
new file mode 100644
index 000000000000..7ce7ae761657
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/epson,rtc-rx6110.txt
@@ -0,0 +1,25 @@
+Epson RX6110 Real Time Clock
+============================
+
+The Epson RX6110 can be used with SPI or I2C busses. The kind of
+bus depends on the SPISEL pin and can not be configured via software.
+
+SPI mode
+--------
+
+Required properties:
+- compatible: should be: "epson,rtc-rx6110"
+- reg: chip select number
+- spi-cs-high: RX6110 needs chipselect high
+- spi-cpha: RX6110 works with SPI shifted clock phase
+- spi-cpol: RX6110 works with SPI inverse clock polarity
+
+Example:
+
+	rtc: rtc@3 {
+		compatible = "epson,rtc-rx6110"
+		reg = <3>
+		spi-cs-high;
+		spi-cpba;
+		spi-cpol;
+	};
-- 
2.6.2

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