target/linux/danube/files/arch/mips/danube/pmu.c

   1 /*
   2  *   arch/mips/danube/pmu.c
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
  19  *
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/version.h>
  25 #include <asm/danube/danube.h>
  26
  27 void
  28 danube_pmu_enable (unsigned int module)
  29 {
  30         int err = 1000000;
  31
  32         writel(readl(DANUBE_PMU_PWDCR) & ~module, DANUBE_PMU_PWDCR);
  33         while (--err && (readl(DANUBE_PMU_PWDSR) & module)) {}
  34
  35         if (!err)
  36                 panic("activating PMU module failed!");
  37 }
  38 EXPORT_SYMBOL(danube_pmu_enable);
  39
  40 void
  41 danube_pmu_disable (unsigned int module)
  42 {
  43         writel(readl(DANUBE_PMU_PWDCR) | module, DANUBE_PMU_PWDCR);
  44 }
  45 EXPORT_SYMBOL(danube_pmu_disable);