IMX7D_UART4_ROOT_SRC
case IMX7D_UART4_ROOT_SRC:
[IMX7D_UART4_ROOT_CG] = { 0xb100, 28, IMX7D_UART4_ROOT_SRC },
[IMX7D_UART4_ROOT_SRC] = { 0xb100, 24, 0x7 },