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rtc: add support of mx27 rtc

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This driver has been tested on board armadeus apf27.

Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
Acked-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
trem 2012-08-08 07:04:46 +00:00 committed by Albert ARIBAUD
parent fdb00b8127
commit 78befb695d
4 changed files with 127 additions and 0 deletions
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3
arch/arm/include/asm/arch-mx27/imx-regs.h
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@ -24,6 +24,8 @@
#ifndef _IMX_REGS_H
#define _IMX_REGS_H
#include <asm/arch/regs-rtc.h>
#ifndef __ASSEMBLY__
extern void imx_gpio_mode (int gpio_mode);
@ -224,6 +226,7 @@ struct fuse_bank0_regs {
#define IMX_TIM1_BASE (0x03000 + IMX_IO_BASE)
#define IMX_TIM2_BASE (0x04000 + IMX_IO_BASE)
#define IMX_TIM3_BASE (0x05000 + IMX_IO_BASE)
#define IMX_RTC_BASE (0x07000 + IMX_IO_BASE)
#define UART1_BASE (0x0a000 + IMX_IO_BASE)
#define UART2_BASE (0x0b000 + IMX_IO_BASE)
#define UART3_BASE (0x0c000 + IMX_IO_BASE)

40
arch/arm/include/asm/arch-mx27/regs-rtc.h Normal file
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@ -0,0 +1,40 @@
/*
* Freescale i.MX27 RTC Register Definitions
*
* 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
*
*/
#ifndef __MX27_REGS_RTC_H__
#define __MX27_REGS_RTC_H__
#ifndef __ASSEMBLY__
struct rtc_regs {
u32 hourmin;
u32 seconds;
u32 alrm_hm;
u32 alrm_sec;
u32 rtcctl;
u32 rtcisr;
u32 rtcienr;
u32 stpwch;
u32 dayr;
u32 dayalarm;
};
#endif /* __ASSEMBLY__*/
#endif /* __MX28_REGS_RTC_H__ */

1
drivers/rtc/Makefile
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@ -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

83
drivers/rtc/mx27rtc.c Normal file
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@ -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);
}