div_to_pl
high_pl = clk->div_to_pl(high_pl);
low_pl = clk->div_to_pl(low_pl);
clk->div_to_pl = div_to_pl;
u32 (*div_to_pl)(u32);
clk->base.div_to_pl = div_to_pl;
clk->div_to_pl = div_to_pl;