IMX7D_UART6_ROOT_PRE_DIV
[IMX7D_UART6_ROOT_PRE_DIV] = { 0xb200, 16, 0x7, IMX7D_UART6_ROOT_CG },
[IMX7D_UART6_ROOT_DIV] = { 0xb200, 0, 0x3f, IMX7D_UART6_ROOT_PRE_DIV },