SCU1_CLK_I3C_DIV_MASK
val = readl(clk_ctrl->base + SCU1_CLK_SEL2) & ~SCU1_CLK_I3C_DIV_MASK;
val |= FIELD_PREP(SCU1_CLK_I3C_DIV_MASK, SCU1_CLK_I3C_DIV(4));