target/linux/pxa/patches-2.6.21/030-serial-divisor.patch

   1 --- a/drivers/serial/pxa.c
   2 +++ b/drivers/serial/pxa.c
   3 @@ -41,6 +41,7 @@
   4  #include <linux/platform_device.h>
   5  #include <linux/tty.h>
   6  #include <linux/tty_flip.h>
   7 +#include <linux/serial.h>
   8  #include <linux/serial_core.h>
   9
  10  #include <asm/io.h>
  11 @@ -577,8 +578,16 @@ static void serial_pxa_config_port(struc
  12  static int
  13  serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
  14  {
  15 -       /* we don't want the core code to modify any port params */
  16 -       return -EINVAL;
  17 +       struct uart_pxa_port *up = (struct uart_pxa_port *)port;
  18 +       int ret = 0;
  19 +
  20 +       if (up->port.uartclk / 16 != ser->baud_base)
  21 +               ret = -EINVAL;
  22 +       else if (((up->port.line & 1) == 0) && ser->baud_base > 230400) /* Max baud rate for STUART and FFUART */
  23 +               ret = -EINVAL;
  24 +       else if (((up->port.line & 1) != 0) && ser->baud_base > 921600) /* Max baud rate for HWUART and BTUART */
  25 +               ret = -EINVAL;
  26 +       return ret;
  27  }
  28
  29  static const char *