RTC_ALM_BIT
if (status & RTC_ALM_BIT) {
mxc_rtc_irq_enable(&pdev->dev, RTC_ALM_BIT, 0);
mxc_rtc_irq_enable(dev, RTC_ALM_BIT, enabled);
alrm->pending = ((readw(ioaddr + RTC_RTCISR) & RTC_ALM_BIT)) ? 1 : 0;
mxc_rtc_irq_enable(dev, RTC_ALM_BIT, alrm->enabled);