RCR2
if (!(readb(rtc->regbase + RCR2) & RCR2_RTCEN))
tmp = readb(rtc->regbase + RCR2);
writeb(tmp, rtc->regbase + RCR2);
tmp = readb(rtc->regbase + RCR2);
writeb(tmp, rtc->regbase + RCR2);
MCBSP_WRITE(mcbsp, RCR2, config->rcr2);
dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n", MCBSP_READ(mcbsp, RCR2));