RK3399_CLK_PLL_MODE_SHIFT
mode = (con4 & RK3399_CLK_PLL_MODE_MASK) >> RK3399_CLK_PLL_MODE_SHIFT;
reg = RK3399_CLK_PLL_MODE_SLOW << RK3399_CLK_PLL_MODE_SHIFT;
reg = RK3399_CLK_PLL_MODE_NORMAL << RK3399_CLK_PLL_MODE_SHIFT;