1/* 2 * Carsten Langgaard, carstenl@mips.com 3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. 4 * 5 * ######################################################################## 6 * 7 * This program is free software; you can distribute it and/or modify it 8 * under the terms of the GNU General Public License (Version 2) as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * for more details. 15 * 16 * You should have received a copy of the GNU General Public License along 17 * with this program; if not, write to the Free Software Foundation, Inc., 18 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 19 * 20 * ######################################################################## 21 * 22 * RTC routines for Atlas style attached Dallas chip. 23 * 24 */ 25#include <linux/mc146818rtc.h> 26#include <asm/mips-boards/atlas.h> 27 28 29static unsigned char atlas_rtc_read_data(unsigned long addr) 30{ 31 volatile unsigned int *rtc_adr_reg = (void *)ATLAS_RTC_ADR_REG; 32 volatile unsigned int *rtc_dat_reg = (void *)ATLAS_RTC_DAT_REG; 33 34 *rtc_adr_reg = addr; 35 36 return *rtc_dat_reg; 37} 38 39static void atlas_rtc_write_data(unsigned char data, unsigned long addr) 40{ 41 volatile unsigned int *rtc_adr_reg = (void *)ATLAS_RTC_ADR_REG; 42 volatile unsigned int *rtc_dat_reg = (void *)ATLAS_RTC_DAT_REG; 43 44 *rtc_adr_reg = addr; 45 *rtc_dat_reg = data; 46} 47 48static int atlas_rtc_bcd_mode(void) 49{ 50 return 0; 51} 52 53struct rtc_ops atlas_rtc_ops = { 54 &atlas_rtc_read_data, 55 &atlas_rtc_write_data, 56 &atlas_rtc_bcd_mode 57}; 58