IMX7D_UART4_ROOT_CG
[IMX7D_UART4_ROOT_CG] = { 0xb100, 28, IMX7D_UART4_ROOT_SRC },
[IMX7D_UART4_ROOT_PRE_DIV] = { 0xb100, 16, 0x7, IMX7D_UART4_ROOT_CG },