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Linux_Drivers/linux_5.10/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
sam.xiang 5c7dd7acc3 [linux] create linux_5.10.4 from T-head official:
repo: https://github.com/T-head-Semi/linux
	commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb

Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
2023-03-10 20:32:41 +08:00

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Atmel AT91SAM9260 Real Time Timer
Required properties:
- compatible: should be one of the following:
- "atmel,at91sam9260-rtt"
- "microchip,sam9x60-rtt", "atmel,at91sam9260-rtt"
- reg: should encode the memory region of the RTT controller
- interrupts: rtt alarm/event interrupt
- clocks: should contain the 32 KHz slow clk that will drive the RTT block.
- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store
the time base when the RTT is used as an RTC.
The first cell should point to the GPBR node and the second one
encode the offset within the GPBR block (or in other words, the
GPBR register used to store the time base).
Example:
rtt@fffffd20 {
compatible = "atmel,at91sam9260-rtt";
reg = <0xfffffd20 0x10>;
interrupts = <1 4 7>;
clocks = <&clk32k>;
atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
};