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 29unsigned long rtas_poweron_auto; /* default and normal state is 0 */ 30 31static ssize_t auto_poweron_show(struct kobject *kobj, 32 struct kobj_attribute *attr, char *buf) 33{ 34 return sprintf(buf, "%lu\n", rtas_poweron_auto); 35} 36 37static ssize_t auto_poweron_store(struct kobject *kobj, 38 struct kobj_attribute *attr, 39 const char *buf, size_t n) 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 52static struct kobj_attribute auto_poweron_attr = 53 __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store); 54 55#ifndef CONFIG_PM 56struct kobject *power_kobj; 57 58static struct attribute *g[] = { 59 &auto_poweron_attr.attr, 60 NULL, 61}; 62 63static struct attribute_group attr_group = { 64 .attrs = g, 65}; 66 67static int __init pm_init(void) 68{ 69 power_kobj = kobject_create_and_add("power", NULL); 70 if (!power_kobj) 71 return -ENOMEM; 72 return sysfs_create_group(power_kobj, &attr_group); 73} 74core_initcall(pm_init); 75#else 76static int __init apo_pm_init(void) 77{ 78 return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr)); 79} 80__initcall(apo_pm_init); 81#endif 82