| Motorola mc146818 compatible RTC | |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
| Required properties: | |
| - compatible : "motorola,mc146818" | |
| - reg : should contain registers location and length. | |
| Optional properties: | |
| - interrupts : should contain interrupt. | |
| - interrupt-parent : interrupt source phandle. | |
| - ctrl-reg : Contains the initial value of the control register also | |
| called "Register B". | |
| - freq-reg : Contains the initial value of the frequency register also | |
| called "Regsiter A". | |
| "Register A" and "B" are usually initialized by the firmware (BIOS for | |
| instance). If this is not done, it can be performed by the driver. | |
| ISA Example: | |
| rtc@70 { | |
| compatible = "motorola,mc146818"; | |
| interrupts = <8 3>; | |
| interrupt-parent = <&ioapic1>; | |
| ctrl-reg = <2>; | |
| freq-reg = <0x26>; | |
| reg = <1 0x70 2>; | |
| }; |