Hello Kiran, You should rewrite this patch referring to 8250.c Au1000 support. Next time, you should send serial driver patch to linux-serial@xxxxxxxxxxxxxxx too. On Fri, 23 Jun 2006 19:02:00 -0700 Kiran Thota <Kiran_Thota@xxxxxxxxxxxxxx> wrote: > @@ -1036,6 +1044,12 @@ > up->acr &= ~UART_ACR_TXDIS; > serial_icr_write(up, UART_ACR, up->acr); > } > + > +#if defined(CONFIG_PMC_INTERNAL_UART) > + /* kick it! */ > + serial_out(up, UART_TX, 0); > +#endif > + > } Is this really necessary for you? > > static void serial8250_stop_rx(struct uart_port *port) > @@ -2158,6 +2172,10 @@ > int parity = 'n'; > int flow = 'n'; > > +#ifdef CONFIG_PMC_SEQUOIA > + baud=115200; > +#endif > + Use "Default kernel command string" or Use boot parameter with your boot loader. eg. console=ttyS0,115200 Yoichi