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5d30bf30 MA |
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 | ||
29 | unsigned long rtas_poweron_auto; /* default and normal state is 0 */ | |
30 | ||
79393fc4 GKH |
31 | static ssize_t auto_poweron_show(struct kobject *kobj, |
32 | struct kobj_attribute *attr, char *buf) | |
5d30bf30 MA |
33 | { |
34 | return sprintf(buf, "%lu\n", rtas_poweron_auto); | |
35 | } | |
36 | ||
79393fc4 GKH |
37 | static ssize_t auto_poweron_store(struct kobject *kobj, |
38 | struct kobj_attribute *attr, | |
39 | const char *buf, size_t n) | |
5d30bf30 MA |
40 | { |
41 | int ret; | |
42 | unsigned long ups_restart; | |
43 | ret = sscanf(buf, "%lu", &ups_restart); | |
44 | ||
45 | if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){ | |
46 | rtas_poweron_auto = ups_restart; | |
47 | return n; | |
48 | } | |
49 | return -EINVAL; | |
50 | } | |
51 | ||
79393fc4 GKH |
52 | static struct kobj_attribute auto_poweron_attr = |
53 | __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store); | |
5d30bf30 MA |
54 | |
55 | #ifndef CONFIG_PM | |
d76e15fb | 56 | struct kobject *power_kobj; |
5d30bf30 MA |
57 | |
58 | static struct attribute *g[] = { | |
59 | &auto_poweron_attr.attr, | |
60 | NULL, | |
61 | }; | |
62 | ||
63 | static struct attribute_group attr_group = { | |
64 | .attrs = g, | |
65 | }; | |
66 | ||
67 | static int __init pm_init(void) | |
68 | { | |
d76e15fb GKH |
69 | power_kobj = kobject_create_and_add("power", NULL); |
70 | if (!power_kobj) | |
039a5dcd | 71 | return -ENOMEM; |
d76e15fb | 72 | return sysfs_create_group(power_kobj, &attr_group); |
5d30bf30 MA |
73 | } |
74 | core_initcall(pm_init); | |
75 | #else | |
5d30bf30 MA |
76 | static int __init apo_pm_init(void) |
77 | { | |
3d5d27c4 | 78 | return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr)); |
5d30bf30 MA |
79 | } |
80 | __initcall(apo_pm_init); | |
81 | #endif |