target/linux/adm5120-2.6/files/arch/mips/adm5120/time.c

   1 /*
   2  *  $Id$
   3  *
   4  *  ADM5120 specific hooks for MIPS CPU Counter/Compare timer
   5  *
   6  *  Copyright (C) 2007 OpenWrt.org
   7  *  Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
   8  *
   9  *  This file was based on: arch/mips/gt64120/wrppmc/time.c
  10  *      Original author: Mark.Zhan
  11  *      Copyright (C) 1996, 1997, 2004 by Ralf Baechle
  12  *      Copyright (C) 2006, Wind River System Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or
  15  *  modify it under the terms of the GNU General Public License
  16  *  as published by the Free Software Foundation; either version 2
  17  *  of the License, or (at your option) any later version.
  18  *
  19  *  This program is distributed in the hope that it will be useful,
  20  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *  GNU General Public License for more details.
  23  *
  24  *  You should have received a copy of the GNU General Public License
  25  *  along with this program; if not, write to the
  26  *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  27  *  Boston, MA  02110-1301, USA.
  28  *
  29  */
  30
  31 #include <linux/types.h>
  32 #include <linux/init.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/timex.h>
  35
  36 #include <asm/irq.h>
  37 #include <asm/cpu.h>
  38 #include <asm/time.h>
  39
  40 #include <asm/mach-adm5120/adm5120_info.h>
  41 #include <asm/mach-adm5120/adm5120_irq.h>
  42
  43 void __init adm5120_time_init(void)
  44 {
  45         mips_hpt_frequency = adm5120_speed / 2;
  46 }
  47
  48 void __init plat_timer_setup(struct irqaction *irq)
  49 {
  50         clear_c0_status(ST0_BEV);
  51
  52         /* Install ISR for CPU Counter interrupt */
  53         setup_irq(ADM5120_IRQ_COUNTER, irq);
  54 }