A_MC7_REF
wrreg_wait(adapter, mc7->offset + A_MC7_REF, 0) ||
wrreg_wait(adapter, mc7->offset + A_MC7_REF, 0) ||
t3_write_reg(adapter, mc7->offset + A_MC7_REF,
t3_read_reg(adapter, mc7->offset + A_MC7_REF); /* flush */