doc: dt: add documentation for alphascale,asm9260-rtc

Document Alphascale asm9260 RTC bindings

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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Oleksij Rempel 2016-02-02 20:56:11 +01:00 коммит произвёл Alexandre Belloni
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Коммит 7444845b08
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* Alphascale asm9260 SoC Real Time Clock
Required properties:
- compatible: Should be "alphascale,asm9260-rtc"
- reg: Physical base address of the controller and length
of memory mapped region.
- interrupts: IRQ line for the RTC.
- clocks: Reference to the clock entry.
- clock-names: should contain:
* "ahb" for the SoC RTC clock
Example:
rtc0: rtc@800a0000 {
compatible = "alphascale,asm9260-rtc";
reg = <0x800a0000 0x100>;
clocks = <&acc CLKID_AHB_RTC>;
clock-names = "ahb";
interrupts = <2>;
};