Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Machine dependent access functions for RTC registers. | |
3 | */ | |
4 | #ifndef _ASM_MC146818RTC_H | |
5 | #define _ASM_MC146818RTC_H | |
6 | ||
fced80c7 | 7 | #include <linux/io.h> |
bd8abc9a RH |
8 | #include <linux/kernel.h> |
9 | ||
10 | #define RTC_IRQ BUILD_BUG_ON(1) | |
1da177e4 LT |
11 | |
12 | #ifndef RTC_PORT | |
13 | #define RTC_PORT(x) (0x70 + (x)) | |
14 | #define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ | |
15 | #endif | |
16 | ||
17 | /* | |
18 | * The yet supported machines all access the RTC index register via | |
19 | * an ISA port access but the way to access the date register differs ... | |
20 | */ | |
21 | #define CMOS_READ(addr) ({ \ | |
22 | outb_p((addr),RTC_PORT(0)); \ | |
23 | inb_p(RTC_PORT(1)); \ | |
24 | }) | |
25 | #define CMOS_WRITE(val, addr) ({ \ | |
26 | outb_p((addr),RTC_PORT(0)); \ | |
27 | outb_p((val),RTC_PORT(1)); \ | |
28 | }) | |
29 | ||
30 | #endif /* _ASM_MC146818RTC_H */ |