diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/mx27rtc.c | 83 |
2 files changed, 84 insertions, 0 deletions
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 4d6cbc4..8316e8f 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -59,6 +59,7 @@ COBJS-$(CONFIG_RTC_MK48T59) += mk48t59.o COBJS-$(CONFIG_RTC_MPC5200) += mpc5xxx.o COBJS-$(CONFIG_RTC_MPC8xx) += mpc8xx.o COBJS-$(CONFIG_RTC_MV) += mvrtc.o +COBJS-$(CONFIG_RTC_MX27) += mx27rtc.o COBJS-$(CONFIG_RTC_MXS) += mxsrtc.o COBJS-$(CONFIG_RTC_PCF8563) += pcf8563.o COBJS-$(CONFIG_RTC_PL031) += pl031.o diff --git a/drivers/rtc/mx27rtc.c b/drivers/rtc/mx27rtc.c new file mode 100644 index 0000000..7628dec --- /dev/null +++ b/drivers/rtc/mx27rtc.c @@ -0,0 +1,83 @@ +/* + * Freescale i.MX27 RTC Driver + * + * Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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 + * + */ + +#include <common.h> +#include <rtc.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> + +#define HOUR_SHIFT 8 +#define HOUR_MASK 0x1f +#define MIN_SHIFT 0 +#define MIN_MASK 0x3f + +int rtc_get(struct rtc_time *time) +{ + struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; + uint32_t day, hour, min, sec; + + day = readl(&rtc_regs->dayr); + hour = readl(&rtc_regs->hourmin); + sec = readl(&rtc_regs->seconds); + + min = (hour >> MIN_SHIFT) & MIN_MASK; + hour = (hour >> HOUR_SHIFT) & HOUR_MASK; + + sec += min * 60 + hour * 3600 + day * 24 * 3600; + + to_tm(sec, time); + + return 0; +} + +int rtc_set(struct rtc_time *time) +{ + struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; + uint32_t day, hour, min, sec; + + sec = mktime(time->tm_year, time->tm_mon, time->tm_mday, + time->tm_hour, time->tm_min, time->tm_sec); + + day = sec / (24 * 3600); + sec = sec % (24 * 3600); + hour = sec / 3600; + sec = sec % 3600; + min = sec / 60; + sec = sec % 60; + + hour = (hour & HOUR_MASK) << HOUR_SHIFT; + hour |= (min & MIN_MASK) << MIN_SHIFT; + + writel(day, &rtc_regs->dayr); + writel(hour, &rtc_regs->hourmin); + writel(sec, &rtc_regs->seconds); + + return 0; +} + +void rtc_reset(void) +{ + struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; + + writel(0, &rtc_regs->dayr); + writel(0, &rtc_regs->hourmin); + writel(0, &rtc_regs->seconds); +} |