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https://github.com/brain-hackers/u-boot-brain
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rtc: add support of mx27 rtc
This driver has been tested on board armadeus apf27. Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr> Acked-by: Stefano Babic <sbabic@denx.de>
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@ -24,6 +24,8 @@
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#ifndef _IMX_REGS_H
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#define _IMX_REGS_H
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#include <asm/arch/regs-rtc.h>
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#ifndef __ASSEMBLY__
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extern void imx_gpio_mode (int gpio_mode);
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@ -224,6 +226,7 @@ struct fuse_bank0_regs {
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#define IMX_TIM1_BASE (0x03000 + IMX_IO_BASE)
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#define IMX_TIM2_BASE (0x04000 + IMX_IO_BASE)
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#define IMX_TIM3_BASE (0x05000 + IMX_IO_BASE)
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#define IMX_RTC_BASE (0x07000 + IMX_IO_BASE)
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#define UART1_BASE (0x0a000 + IMX_IO_BASE)
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#define UART2_BASE (0x0b000 + IMX_IO_BASE)
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#define UART3_BASE (0x0c000 + IMX_IO_BASE)
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40
arch/arm/include/asm/arch-mx27/regs-rtc.h
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40
arch/arm/include/asm/arch-mx27/regs-rtc.h
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@ -0,0 +1,40 @@
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/*
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* Freescale i.MX27 RTC Register Definitions
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*
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* Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __MX27_REGS_RTC_H__
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#define __MX27_REGS_RTC_H__
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#ifndef __ASSEMBLY__
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struct rtc_regs {
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u32 hourmin;
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u32 seconds;
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u32 alrm_hm;
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u32 alrm_sec;
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u32 rtcctl;
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u32 rtcisr;
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u32 rtcienr;
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u32 stpwch;
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u32 dayr;
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u32 dayalarm;
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};
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#endif /* __ASSEMBLY__*/
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#endif /* __MX28_REGS_RTC_H__ */
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@ -59,6 +59,7 @@ COBJS-$(CONFIG_RTC_MK48T59) += mk48t59.o
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COBJS-$(CONFIG_RTC_MPC5200) += mpc5xxx.o
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COBJS-$(CONFIG_RTC_MPC8xx) += mpc8xx.o
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COBJS-$(CONFIG_RTC_MV) += mvrtc.o
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COBJS-$(CONFIG_RTC_MX27) += mx27rtc.o
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COBJS-$(CONFIG_RTC_MXS) += mxsrtc.o
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COBJS-$(CONFIG_RTC_PCF8563) += pcf8563.o
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COBJS-$(CONFIG_RTC_PL031) += pl031.o
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83
drivers/rtc/mx27rtc.c
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83
drivers/rtc/mx27rtc.c
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@ -0,0 +1,83 @@
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/*
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* Freescale i.MX27 RTC Driver
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*
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* Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <rtc.h>
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#include <asm/io.h>
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#include <asm/arch/imx-regs.h>
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#define HOUR_SHIFT 8
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#define HOUR_MASK 0x1f
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#define MIN_SHIFT 0
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#define MIN_MASK 0x3f
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int rtc_get(struct rtc_time *time)
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{
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struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
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uint32_t day, hour, min, sec;
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day = readl(&rtc_regs->dayr);
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hour = readl(&rtc_regs->hourmin);
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sec = readl(&rtc_regs->seconds);
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min = (hour >> MIN_SHIFT) & MIN_MASK;
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hour = (hour >> HOUR_SHIFT) & HOUR_MASK;
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sec += min * 60 + hour * 3600 + day * 24 * 3600;
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to_tm(sec, time);
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return 0;
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}
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int rtc_set(struct rtc_time *time)
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{
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struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
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uint32_t day, hour, min, sec;
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sec = mktime(time->tm_year, time->tm_mon, time->tm_mday,
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time->tm_hour, time->tm_min, time->tm_sec);
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day = sec / (24 * 3600);
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sec = sec % (24 * 3600);
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hour = sec / 3600;
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sec = sec % 3600;
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min = sec / 60;
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sec = sec % 60;
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hour = (hour & HOUR_MASK) << HOUR_SHIFT;
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hour |= (min & MIN_MASK) << MIN_SHIFT;
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writel(day, &rtc_regs->dayr);
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writel(hour, &rtc_regs->hourmin);
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writel(sec, &rtc_regs->seconds);
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return 0;
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}
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void rtc_reset(void)
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{
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struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
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writel(0, &rtc_regs->dayr);
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writel(0, &rtc_regs->hourmin);
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writel(0, &rtc_regs->seconds);
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}
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