RCG_M_OFFSET
regmap_read(rcg->clkr.regmap, RCG_M_OFFSET(rcg), &m);
RCG_M_OFFSET(rcg), mask, f->m);
regmap_read(rcg->clkr.regmap, RCG_M_OFFSET(rcg), &m);
regmap_read(rcg->clkr.regmap, RCG_M_OFFSET(rcg), &m);