CLK_DIV_SHFT
val = (itr->clk_div << CLK_DIV_SHFT) | SER_CLK_EN;
m_clk_cfg = (div << CLK_DIV_SHFT) | SER_CLK_EN;
if (clk_div > (CLK_DIV_MSK >> CLK_DIV_SHFT)) {
ser_clk_cfg |= clk_div << CLK_DIV_SHFT;