2 * arch/m68k/sun3/intersil.c
4 * basic routines for accessing the intersil clock within the sun3 machines
6 * started 11/12/1999 Sam Creasey
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive
13 #include <linux/kernel.h>
14 #include <linux/rtc.h>
16 #include <asm/errno.h>
17 #include <asm/intersil.h>
18 #include <asm/machdep.h>
21 /* bits to set for start/run of the intersil */
22 #define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
23 #define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
27 int sun3_hwclk(int set, struct rtc_time *t)
29 volatile struct intersil_dt *todintersil;
32 todintersil = (struct intersil_dt *) &intersil_clock->counter;
34 local_irq_save(flags);
36 intersil_clock->cmd_reg = STOP_VAL;
38 /* set or read the clock */
40 todintersil->csec = 0;
41 todintersil->hour = t->tm_hour;
42 todintersil->minute = t->tm_min;
43 todintersil->second = t->tm_sec;
44 todintersil->month = t->tm_mon + 1;
45 todintersil->day = t->tm_mday;
46 todintersil->year = (t->tm_year - 68) % 100;
47 todintersil->weekday = t->tm_wday;
50 t->tm_sec = todintersil->csec;
51 t->tm_hour = todintersil->hour;
52 t->tm_min = todintersil->minute;
53 t->tm_sec = todintersil->second;
54 t->tm_mon = todintersil->month - 1;
55 t->tm_mday = todintersil->day;
56 t->tm_year = todintersil->year + 68;
57 t->tm_wday = todintersil->weekday;
62 intersil_clock->cmd_reg = START_VAL;
64 local_irq_restore(flags);