Index: linux-2.6.21.7/drivers/serial/pxa.c =================================================================== --- linux-2.6.21.7.orig/drivers/serial/pxa.c +++ linux-2.6.21.7/drivers/serial/pxa.c @@ -41,6 +41,7 @@ #include #include #include +#include #include #include @@ -577,8 +578,16 @@ static void serial_pxa_config_port(struc static int serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser) { - /* we don't want the core code to modify any port params */ - return -EINVAL; + struct uart_pxa_port *up = (struct uart_pxa_port *)port; + int ret = 0; + + if (up->port.uartclk / 16 != ser->baud_base) + ret = -EINVAL; + else if (((up->port.line & 1) == 0) && ser->baud_base > 230400) /* Max baud rate for STUART and FFUART */ + ret = -EINVAL; + else if (((up->port.line & 1) != 0) && ser->baud_base > 921600) /* Max baud rate for HWUART and BTUART */ + ret = -EINVAL; + return ret; } static const char *