summaryrefslogtreecommitdiff
path: root/include/asm-ppc/mc146818rtc.h
blob: 5f806c4ec21f6a1dde02f5a39b1ac7f0b1ce7f89 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
/*
 * Machine dependent access functions for RTC registers.
 */
#ifndef __ASM_PPC_MC146818RTC_H
#define __ASM_PPC_MC146818RTC_H

#include <asm/io.h>

#ifndef RTC_PORT
#define RTC_PORT(x) (0x70 + (x))
#define RTC_ALWAYS_BCD  1   /* RTC operates in binary mode */
#endif

/*
 * The yet supported machines all access the RTC index register via
 * an ISA port access but the way to access the date register differs ...
 */
#define CMOS_READ(addr) ({ \
outb_p((addr),RTC_PORT(0)); \
inb_p(RTC_PORT(1)); \
})
#define CMOS_WRITE(val, addr) ({ \
outb_p((addr),RTC_PORT(0)); \
outb_p((val),RTC_PORT(1)); \
})

#endif /* __ASM_PPC_MC146818RTC_H */