SRTC_LPSR
writel(lp_status, ioaddr + SRTC_LPSR);
alrm->pending = !!(readl(ioaddr + SRTC_LPSR) & SRTC_LPSR_ALP);
writel(SRTC_LPSR_ALP, pdata->ioaddr + SRTC_LPSR);
writel(0xFFFFFFFF, ioaddr + SRTC_LPSR);
ret = mxc_rtc_wait_for_flag(ioaddr + SRTC_LPSR, SRTC_LPSR_IES);
ret = mxc_rtc_wait_for_flag(ioaddr + SRTC_LPSR, SRTC_LPSR_NVES);
lp_status = readl(ioaddr + SRTC_LPSR);