| Manish Ahuja | 5d30bf3 | 2007-02-08 16:01:17 -0600 | [diff] [blame^] | 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 | |
| 31 | static ssize_t auto_poweron_show(struct subsystem *subsys, char *buf) |
| 32 | { |
| 33 | return sprintf(buf, "%lu\n", rtas_poweron_auto); |
| 34 | } |
| 35 | |
| 36 | static ssize_t |
| 37 | auto_poweron_store(struct subsystem *subsys, const char *buf, size_t n) |
| 38 | { |
| 39 | int ret; |
| 40 | unsigned long ups_restart; |
| 41 | ret = sscanf(buf, "%lu", &ups_restart); |
| 42 | |
| 43 | if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){ |
| 44 | rtas_poweron_auto = ups_restart; |
| 45 | return n; |
| 46 | } |
| 47 | return -EINVAL; |
| 48 | } |
| 49 | |
| 50 | static struct subsys_attribute auto_poweron_attr = { |
| 51 | .attr = { |
| 52 | .name = __stringify(auto_poweron), |
| 53 | .mode = 0644, |
| 54 | }, |
| 55 | .show = auto_poweron_show, |
| 56 | .store = auto_poweron_store, |
| 57 | }; |
| 58 | |
| 59 | #ifndef CONFIG_PM |
| 60 | decl_subsys(power,NULL,NULL); |
| 61 | |
| 62 | static struct attribute *g[] = { |
| 63 | &auto_poweron_attr.attr, |
| 64 | NULL, |
| 65 | }; |
| 66 | |
| 67 | static struct attribute_group attr_group = { |
| 68 | .attrs = g, |
| 69 | }; |
| 70 | |
| 71 | static int __init pm_init(void) |
| 72 | { |
| 73 | int error = subsystem_register(&power_subsys); |
| 74 | if (!error) |
| 75 | error = sysfs_create_group(&power_subsys.kset.kobj,&attr_group); |
| 76 | return error; |
| 77 | } |
| 78 | core_initcall(pm_init); |
| 79 | #else |
| 80 | extern struct subsystem power_subsys; |
| 81 | |
| 82 | static int __init apo_pm_init(void) |
| 83 | { |
| 84 | return (subsys_create_file(&power_subsys, &auto_poweron_attr)); |
| 85 | } |
| 86 | __initcall(apo_pm_init); |
| 87 | #endif |