1 Motorola mc146818 compatible RTC
2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3
4 Required properties:
5 - compatible : "motorola,mc146818"
6 - reg : should contain registers location and length.
7
8 Optional properties:
9 - interrupts : should contain interrupt.
10 - ctrl-reg : Contains the initial value of the control register also
11 called "Register B".
12 - freq-reg : Contains the initial value of the frequency register also
13 called "Register A".
14
15 "Register A" and "B" are usually initialized by the firmware (BIOS for
16 instance). If this is not done, it can be performed by the driver.
17
18 ISA Example:
19
20 rtc@70 {
21 compatible = "motorola,mc146818";
22 interrupts = <8 3>;
23 interrupt-parent = <&ioapic1>;
24 ctrl-reg = <2>;
25 freq-reg = <0x26>;
26 reg = <1 0x70 2>;
27 };
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