arch/openrisc/include/asm/serial.h

   1 /*
   2  * OpenRISC Linux
   3  *
   4  * Linux architectural port borrowing liberally from similar works of
   5  * others.  All original copyrights apply as per the original source
   6  * declaration.
   7  *
   8  * OpenRISC implementation:
   9  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  10  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  11  * et al.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  */
  18
  19 #ifndef __ASM_OPENRISC_SERIAL_H
  20 #define __ASM_OPENRISC_SERIAL_H
  21
  22 #ifdef __KERNEL__
  23
  24 #include <asm/cpuinfo.h>
  25
  26 /* There's a generic version of this file, but it assumes a 1.8MHz UART clk...
  27  * this, on the other hand, assumes the UART clock is tied to the system
  28  * clock... 8250_early.c (early 8250 serial console) actually uses this, so
  29  * it needs to be correct to get the early console working.
  30  */
  31
  32 #define BASE_BAUD (cpuinfo.clock_frequency/16)
  33
  34 #endif /* __KERNEL__ */
  35
  36 #endif /* __ASM_OPENRISC_SERIAL_H */