Source of rtc-at91rm9200.c - linux-imx - PHYTEC BitBucket (Stash)

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/*
 * Read current time and date in RTC
 */
static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm)
{
    at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, tm);
    tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
    tm->tm_year = tm->tm_year - 1900;
​
    dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
        1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
        tm->tm_hour, tm->tm_min, tm->tm_sec);
    dev_dbg(dev, "%s(): %ptR\n", __func__, tm);
​
    return 0;
}
​
/*
 * Set current time and date in RTC
 */
static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
{
    unsigned long cr;
​
    dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
        1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
        tm->tm_hour, tm->tm_min, tm->tm_sec);
    dev_dbg(dev, "%s(): %ptR\n", __func__, tm);
​
    wait_for_completion(&at91_rtc_upd_rdy);
​
    /* Stop Time/Calendar from counting */
    cr = at91_rtc_read(AT91_RTC_CR);
    at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
​
    at91_rtc_write_ier(AT91_RTC_ACKUPD);
    wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */
    at91_rtc_write_idr(AT91_RTC_ACKUPD);
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static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
    struct rtc_time *tm = &alrm->time;
​
    at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm);
    tm->tm_year = -1;
​
    alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM)
            ? 1 : 0;
​
    dev_dbg(dev, "%s(): %02d-%02d %02d:%02d:%02d %sabled\n", __func__,
        tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
    dev_dbg(dev, "%s(): %ptR %sabled\n", __func__, tm,
        alrm->enabled ? "en" : "dis");
​
    return 0;
}
​
/*
 * Set alarm time and date in RTC
 */
static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
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    at91_rtc_write(AT91_RTC_CALALR,
          bin2bcd(tm.tm_mon + 1) << 16      /* tm_mon starts at zero */
        | bin2bcd(tm.tm_mday) << 24
        | AT91_RTC_DATEEN | AT91_RTC_MTHEN);
​
    if (alrm->enabled) {
        at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
        at91_rtc_write_ier(AT91_RTC_ALARM);
    }
​
    dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
        tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
        tm.tm_min, tm.tm_sec);
    dev_dbg(dev, "%s(): %ptR\n", __func__, &tm);
​
    return 0;
}
​
static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
    dev_dbg(dev, "%s(): cmd=%08x\n", __func__, enabled);
​
    if (enabled) {
        at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);