b96cfdc5707c090e09405d479fe2531d22f79155
[openwrt/svn-archive/archive.git] / target / linux / ifxmips / 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(IFXMIPS_PMU_PWDCR) & ~module, IFXMIPS_PMU_PWDCR);
33 while (--err && (readl(IFXMIPS_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(IFXMIPS_PMU_PWDCR) | module, IFXMIPS_PMU_PWDCR);
44 }
45 EXPORT_SYMBOL(danube_pmu_disable);