CDNS_UART_CD_MAX
if (baud < clk / ((CDNS_UART_BDIV_MAX + 1) * CDNS_UART_CD_MAX)) {
if (cd < 1 || cd > CDNS_UART_CD_MAX)
((CDNS_UART_BDIV_MAX + 1) * CDNS_UART_CD_MAX * 8);