linux-imx

/* NXP PCF50633 RTC Driver

 *

 * (C) 2006-2008 by Openmoko, Inc.

 * Author: Balaji Rao <balajirrao@openmoko.org>

 * All rights reserved.

 *

 * Broken down from monstrous PCF50633 driver mainly by

 * Harald Welte, Andy Green and Werner Almesberger

 *

 *  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.

 *

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/slab.h>

#include <linux/platform_device.h>

#include <linux/rtc.h>

#include <linux/bcd.h>

#include <linux/err.h>

​

#include <linux/mfd/pcf50633/core.h>

​

#define PCF50633_REG_RTCSC  0x59 /* Second */

#define PCF50633_REG_RTCMN  0x5a /* Minute */

#define PCF50633_REG_RTCHR  0x5b /* Hour */

#define PCF50633_REG_RTCWD  0x5c /* Weekday */

#define PCF50633_REG_RTCDT  0x5d /* Day */

#define PCF50633_REG_RTCMT  0x5e /* Month */

#define PCF50633_REG_RTCYR  0x5f /* Year */

#define PCF50633_REG_RTCSCA 0x60 /* Alarm Second */

#define PCF50633_REG_RTCMNA 0x61 /* Alarm Minute */

#define PCF50633_REG_RTCHRA 0x62 /* Alarm Hour */

#define PCF50633_REG_RTCWDA 0x63 /* Alarm Weekday */

#define PCF50633_REG_RTCDTA 0x64 /* Alarm Day */

#define PCF50633_REG_RTCMTA 0x65 /* Alarm Month */

#define PCF50633_REG_RTCYRA 0x66 /* Alarm Year */

​

enum pcf50633_time_indexes {

    PCF50633_TI_SEC,

    PCF50633_TI_MIN,

    PCF50633_TI_HOUR,

    PCF50633_TI_WKDAY,

    PCF50633_TI_DAY,

    PCF50633_TI_MONTH,

    PCF50633_TI_YEAR,

    PCF50633_TI_EXTENT /* always last */

};

​

struct pcf50633_time {

    u_int8_t time[PCF50633_TI_EXTENT];

};

​

struct pcf50633_rtc {

    int alarm_enabled;

    int alarm_pending;

​

    struct pcf50633 *pcf;

    struct rtc_device *rtc_dev;

};

​

static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf)

{

    rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);

    rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);

    rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);

    rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);

    rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);

    rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]) - 1;

    rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;

}

​

static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc)

{

    pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);

    pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);

    pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);

    pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);

    pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);

    pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon + 1);

    pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year % 100);

}

​

static int

pcf50633_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)

{

    struct pcf50633_rtc *rtc = dev_get_drvdata(dev);