Document devicetree bindings for ROHM BD71837 PMIC clock output.

Signed-off-by: Matti Vaittinen <matti.vaitti...@fi.rohmeurope.com>
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 .../bindings/clock/rohm,bd71837-clock.txt          | 37 ++++++++++++++++++++++
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Documentation/devicetree/bindings/clock/rohm,bd71837-clock.txt

diff --git a/Documentation/devicetree/bindings/clock/rohm,bd71837-clock.txt 
b/Documentation/devicetree/bindings/clock/rohm,bd71837-clock.txt
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+ROHM BD71837 Power Management Integrated Circuit clock bindings
+
+BD71837 clock node should be sub node of the BD71837 MFD node.
+See BD71837 MFD bindings at
+Documentation/devicetree/bindings/mfd/rohm,bd71837-pmic.txt
+
+Required properties:
+- compatible           : Should be "rohm,bd71837-clk"
+- clock-frequency      : Should be 32768
+- #clock-cells         : Should be 0
+
+Optional properties:
+- clock-output-names   : Should contain name for output clock.
+  Name "bd71837-32k-out" is used if this is not given.
+
+
+Example:
+
+pmic: bd71837@4b {
+       compatible = "rohm,bd71837";
+       #address-cells = <1>;
+       #size-cells = <0>;
+       reg = <0x4b>;
+       interrupt-parent = <&gpio1>;
+       interrupts = <29 GPIO_ACTIVE_LOW>;
+       interrupt-names = "irq";
+       #interrupt-cells = <1>;
+       interrupt-controller;
+
+       /* Clock node */
+       clk: bd71837-32k-out {
+               compatible = "rohm,bd71837-clk";
+               #clock-cells = <0>;
+               clock-frequency  = <32768>;
+               clock-output-names = "bd71837-32k-out";
+       };
+};
-- 
2.14.3

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