LPC_LPT_MSB_OFF
writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
writel_relaxed(lpt >> 32, rtc->ioaddr + LPC_LPT_MSB_OFF);
lpt_msb = readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF);
} while (readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF) != lpt_msb);