| 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>; |
| }; |