[mirror_ubuntu-bionic-kernel.git] / Documentation / devicetree / bindings / rtc / sun6i-rtc.txt

* sun6i Real Time Clock

RTC controller for the Allwinner A31

Required properties:
- compatible	: Should be "allwinner,sun6i-a31-rtc"
- reg		: physical base address of the controller and length of
		  memory mapped region.
- interrupts	: IRQ lines for the RTC alarm 0 and alarm 1, in that order.

Required properties for new device trees
- clocks	: phandle to the 32kHz external oscillator
- clock-output-names : names of the LOSC and its external output clocks created
- #clock-cells  : must be equals to 1. The RTC provides two clocks: the
		  LOSC and its external output, with index 0 and 1
		  respectively.

Example:

rtc: rtc@01f00000 {
	compatible = "allwinner,sun6i-a31-rtc";
	reg = <0x01f00000 0x54>;
	interrupts = <0 40 4>, <0 41 4>;
	clock-output-names = "osc32k", "osc32k-out";
	clocks = <&ext_osc32k>;
	#clock-cells = <1>;
};
Commit	Line	Data
9765d2d9 CYT	1	* sun6i Real Time Clock
	2
	3	RTC controller for the Allwinner A31
	4
	5	Required properties:
	6	- compatible : Should be "allwinner,sun6i-a31-rtc"
	7	- reg : physical base address of the controller and length of
	8	memory mapped region.
	9	- interrupts : IRQ lines for the RTC alarm 0 and alarm 1, in that order.
	10
3855c2c3 MR	11	Required properties for new device trees
3855c2c3 MR	12	- clocks : phandle to the 32kHz external oscillator
17ecd246	13	- clock-output-names : names of the LOSC and its external output clocks created
3855c2c3 MR	14	- #clock-cells : must be equals to 1. The RTC provides two clocks: the
	15	LOSC and its external output, with index 0 and 1
	16	respectively.
	17
9765d2d9 CYT	18	Example:
	19
	20	rtc: rtc@01f00000 {
	21	compatible = "allwinner,sun6i-a31-rtc";
	22	reg = <0x01f00000 0x54>;
	23	interrupts = <0 40 4>, <0 41 4>;
17ecd246	24	clock-output-names = "osc32k", "osc32k-out";
3855c2c3 MR	25	clocks = <&ext_osc32k>;
3855c2c3 MR	26	#clock-cells = <1>;
9765d2d9	27	};