target/linux/ubicom32/files/arch/ubicom32/lib/delay.c

   1 /*
   2  * arch/ubicom32/lib/delay.c
   3  *   Ubicom32 implementation of udelay()
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28
  29 #include <linux/module.h>
  30 #include <asm/param.h>
  31 #include <asm/delay.h>
  32 #include <asm/ip5000.h>
  33
  34 /*
  35  * read_current_timer()
  36  *      Return the current value of sysval.
  37  */
  38 int __devinit read_current_timer(unsigned long *timer_val)
  39 {
  40         *timer_val = (long)(UBICOM32_IO_TIMER->sysval);
  41         return 0;
  42 }
  43
  44
  45 void udelay(unsigned long usecs)
  46 {
  47         _udelay(usecs);
  48 }
  49 EXPORT_SYMBOL(udelay);