div_frac_get
div = div_frac_get(rate, parent_rate, divider->width,
div = div_frac_get(req->rate, output_rate, 8, 1, sdmmc_mux->div_flags);
div = div_frac_get(rate, parent_rate, 8, 1, sdmmc_mux->div_flags);
div = div_frac_get(rate, parent_rate, 8, 1, 0);
div = div_frac_get(rate, parent_rate, 8, 1, 0);
div = div_frac_get(emc_rate, parent_rate, 8, 1, 0);
int div_frac_get(unsigned long rate, unsigned parent_rate, u8 width,