atlas_rtc.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:2k
- /*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
- *
- * ########################################################################
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * RTC routines for Atlas style attached Dallas chip.
- *
- */
- #include <linux/mc146818rtc.h>
- #include <asm/mips-boards/atlas.h>
- static unsigned char atlas_rtc_read_data(unsigned long addr)
- {
- volatile unsigned int *rtc_adr_reg = (void *)ATLAS_RTC_ADR_REG;
- volatile unsigned int *rtc_dat_reg = (void *)ATLAS_RTC_DAT_REG;
- *rtc_adr_reg = addr;
- return *rtc_dat_reg;
- }
- static void atlas_rtc_write_data(unsigned char data, unsigned long addr)
- {
- volatile unsigned int *rtc_adr_reg = (void *)ATLAS_RTC_ADR_REG;
- volatile unsigned int *rtc_dat_reg = (void *)ATLAS_RTC_DAT_REG;
- *rtc_adr_reg = addr;
- *rtc_dat_reg = data;
- }
- static int atlas_rtc_bcd_mode(void)
- {
- return 0;
- }
- struct rtc_ops atlas_rtc_ops = {
- &atlas_rtc_read_data,
- &atlas_rtc_write_data,
- &atlas_rtc_bcd_mode
- };