Linux 4.1.18
[linux/fpc-iii.git] / arch / powerpc / platforms / pseries / power.c
blobc26eadde434c9a3f0ffa53257324b75bf12b1c96
1 /*
2 * Interface for power-management for ppc64 compliant platform
4 * Manish Ahuja <mahuja@us.ibm.com>
6 * Feb 2007
8 * Copyright (C) 2007 IBM Corporation.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2 of the License.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/kobject.h>
25 #include <linux/string.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <asm/machdep.h>
30 unsigned long rtas_poweron_auto; /* default and normal state is 0 */
32 static ssize_t auto_poweron_show(struct kobject *kobj,
33 struct kobj_attribute *attr, char *buf)
35 return sprintf(buf, "%lu\n", rtas_poweron_auto);
38 static ssize_t auto_poweron_store(struct kobject *kobj,
39 struct kobj_attribute *attr,
40 const char *buf, size_t n)
42 int ret;
43 unsigned long ups_restart;
44 ret = sscanf(buf, "%lu", &ups_restart);
46 if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){
47 rtas_poweron_auto = ups_restart;
48 return n;
50 return -EINVAL;
53 static struct kobj_attribute auto_poweron_attr =
54 __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store);
56 #ifndef CONFIG_PM
57 struct kobject *power_kobj;
59 static struct attribute *g[] = {
60 &auto_poweron_attr.attr,
61 NULL,
64 static struct attribute_group attr_group = {
65 .attrs = g,
68 static int __init pm_init(void)
70 power_kobj = kobject_create_and_add("power", NULL);
71 if (!power_kobj)
72 return -ENOMEM;
73 return sysfs_create_group(power_kobj, &attr_group);
75 machine_core_initcall(pseries, pm_init);
76 #else
77 static int __init apo_pm_init(void)
79 return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr));
81 machine_device_initcall(pseries, apo_pm_init);
82 #endif