linux-imx

/*

 *  pcap rtc code for Motorola EZX phones

 *

 *  Copyright (c) 2008 guiming zhuo <gmzhuo@gmail.com>

 *  Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com>

 *

 *  Based on Motorola's rtc.c Copyright (c) 2003-2005 Motorola

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License version 2 as

 *  published by the Free Software Foundation.

 *

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/mfd/ezx-pcap.h>

#include <linux/rtc.h>

#include <linux/slab.h>

#include <linux/platform_device.h>

​

struct pcap_rtc {

    struct pcap_chip *pcap;

    struct rtc_device *rtc;

};

​

static irqreturn_t pcap_rtc_irq(int irq, void *_pcap_rtc)

{

    struct pcap_rtc *pcap_rtc = _pcap_rtc;

    unsigned long rtc_events;

​

    if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ))

        rtc_events = RTC_IRQF | RTC_UF;

    else if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA))

        rtc_events = RTC_IRQF | RTC_AF;

    else

        rtc_events = 0;

​

    rtc_update_irq(pcap_rtc->rtc, 1, rtc_events);

    return IRQ_HANDLED;

}

​

static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)

{

    struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);

    struct rtc_time *tm = &alrm->time;

    unsigned long secs;

    u32 tod;    /* time of day, seconds since midnight */

    u32 days;   /* days since 1/1/1970 */

​

    ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TODA, &tod);

    secs = tod & PCAP_RTC_TOD_MASK;

​

    ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, &days);

    secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;

​

    rtc_time_to_tm(secs, tm);

​

    return 0;

}

​

static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)