SUN6I_CLK_CTL_CDR1_MASK
div = min(SUN6I_CLK_CTL_CDR1_MASK, order_base_2(div_cdr1));
#define SUN6I_CLK_CTL_CDR1(div) (((div) & SUN6I_CLK_CTL_CDR1_MASK) << 8)