1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Machine dependent access functions for RTC registers.
4 */
5 #ifndef __ASM_SPARC64_MC146818RTC_H
6 #define __ASM_SPARC64_MC146818RTC_H
7
8 #include <asm/io.h>
9
10 #ifndef RTC_PORT
11 extern unsigned long cmos_regs;
12 #define RTC_PORT(x) (cmos_regs + (x))
13 #define RTC_ALWAYS_BCD 0
14 #endif
15
16 /*
17 * The yet supported machines all access the RTC index register via
18 * an ISA port access but the way to access the date register differs ...
19 */
20 #define CMOS_READ(addr) ({ \
21 outb_p((addr),RTC_PORT(0)); \
22 inb_p(RTC_PORT(1)); \
23 })
24 #define CMOS_WRITE(val, addr) ({ \
25 outb_p((addr),RTC_PORT(0)); \
26 outb_p((val),RTC_PORT(1)); \
27 })
28
29 #endif /* __ASM_SPARC64_MC146818RTC_H */