CLMPCC_REG_TCOR
clmpcc_wrreg(sc, CLMPCC_REG_TCOR, CLMPCC_TCOR_CLK(tcor));
r1 = clmpcc_rdreg(sc, CLMPCC_REG_TCOR);
clmpcc_wrreg(sc, CLMPCC_REG_TCOR, ch->ch_tcor);