Commit 04767b9f authored by Chris Brandt's avatar Chris Brandt Committed by Alexandre Belloni
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dt-bindings: rtc: document the rtc-sh bindings 



Add the binding documentation for rtc-sh which is an RTC for
SuperH and RZ/A SoCs.

Signed-off-by: default avatarChris Brandt <chris.brandt@renesas.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent dab5aec6

Documentation/devicetree/bindings/rtc/rtc-sh.txt

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* Real Time Clock for Renesas SH and ARM SoCs



Required properties:

- compatible: Should be "renesas,r7s72100-rtc" and "renesas,sh-rtc" as a

  fallback.

- reg: physical base address and length of memory mapped region.

- interrupts: 3 interrupts for alarm, period, and carry.

- interrupt-names: The interrupts should be labeled as "alarm", "period", and

  "carry".

- clocks: The functional clock source for the RTC controller must be listed

  first (if exists). Additionally, potential clock counting sources are to be

  listed.

- clock-names: The functional clock must be labeled as "fck". Other clocks

  may be named in accordance to the SoC hardware manuals.





Example:

rtc: rtc@fcff1000 {

	compatible = "renesas,r7s72100-rtc", "renesas,sh-rtc";

	reg = <0xfcff1000 0x2e>;

	interrupts = <GIC_SPI 276 IRQ_TYPE_EDGE_RISING

		      GIC_SPI 277 IRQ_TYPE_EDGE_RISING

		      GIC_SPI 278 IRQ_TYPE_EDGE_RISING>;

	interrupt-names = "alarm", "period", "carry";

	clocks = <&mstp6_clks R7S72100_CLK_RTC>, <&rtc_x1_clk>,

		 <&rtc_x3_clk>, <&extal_clk>;

	clock-names = "fck", "rtc_x1", "rtc_x3", "extal";

};