1 /*
2 * Interface for power-management for ppc64 compliant platform
3 *
4 * Manish Ahuja <mahuja@us.ibm.com>
5 *
6 * Feb 2007
7 *
8 * Copyright (C) 2007 IBM Corporation.
9 *
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.
13 *
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.
18 *
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
22 */
23
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>
29
30 #include "pseries.h"
31
32 unsigned long rtas_poweron_auto; /* default and normal state is 0 */
33
auto_poweron_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)34 static ssize_t auto_poweron_show(struct kobject *kobj,
35 struct kobj_attribute *attr, char *buf)
36 {
37 return sprintf(buf, "%lu\n", rtas_poweron_auto);
38 }
39
auto_poweron_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t n)40 static ssize_t auto_poweron_store(struct kobject *kobj,
41 struct kobj_attribute *attr,
42 const char *buf, size_t n)
43 {
44 int ret;
45 unsigned long ups_restart;
46 ret = sscanf(buf, "%lu", &ups_restart);
47
48 if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){
49 rtas_poweron_auto = ups_restart;
50 return n;
51 }
52 return -EINVAL;
53 }
54
55 static struct kobj_attribute auto_poweron_attr =
56 __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store);
57
58 #ifndef CONFIG_PM
59 struct kobject *power_kobj;
60
61 static struct attribute *g[] = {
62 &auto_poweron_attr.attr,
63 NULL,
64 };
65
66 static struct attribute_group attr_group = {
67 .attrs = g,
68 };
69
pm_init(void)70 static int __init pm_init(void)
71 {
72 power_kobj = kobject_create_and_add("power", NULL);
73 if (!power_kobj)
74 return -ENOMEM;
75 return sysfs_create_group(power_kobj, &attr_group);
76 }
77 machine_core_initcall(pseries, pm_init);
78 #else
apo_pm_init(void)79 static int __init apo_pm_init(void)
80 {
81 return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr));
82 }
83 machine_device_initcall(pseries, apo_pm_init);
84 #endif
85
