From 5d30bf309717a518d0c4180af41650d4dcd3bb38 Mon Sep 17 00:00:00 2001 From: Manish Ahuja Date: Thu, 8 Feb 2007 16:01:17 -0600 Subject: [POWERPC] pseries: Enabling auto poweron after power is restored. During power outages, the UPS notifies the system for a shutdown. In the current setup, it isn't possible to poweron when power is restored. This patch fixes the issue by calling the right ibm,power-off-ups token during such events. It also adds a sysfs interface so userspace can specify whether or not to power on when power is restored. Signed-off-by: Manish Ahuja Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/pseries/power.c | 87 ++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 arch/powerpc/platforms/pseries/power.c (limited to 'arch/powerpc/platforms/pseries/power.c') diff --git a/arch/powerpc/platforms/pseries/power.c b/arch/powerpc/platforms/pseries/power.c new file mode 100644 index 000000000000..2624b71df73d --- /dev/null +++ b/arch/powerpc/platforms/pseries/power.c @@ -0,0 +1,87 @@ +/* + * Interface for power-management for ppc64 compliant platform + * + * Manish Ahuja + * + * Feb 2007 + * + * Copyright (C) 2007 IBM Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include + +unsigned long rtas_poweron_auto; /* default and normal state is 0 */ + +static ssize_t auto_poweron_show(struct subsystem *subsys, char *buf) +{ + return sprintf(buf, "%lu\n", rtas_poweron_auto); +} + +static ssize_t +auto_poweron_store(struct subsystem *subsys, const char *buf, size_t n) +{ + int ret; + unsigned long ups_restart; + ret = sscanf(buf, "%lu", &ups_restart); + + if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){ + rtas_poweron_auto = ups_restart; + return n; + } + return -EINVAL; +} + +static struct subsys_attribute auto_poweron_attr = { + .attr = { + .name = __stringify(auto_poweron), + .mode = 0644, + }, + .show = auto_poweron_show, + .store = auto_poweron_store, +}; + +#ifndef CONFIG_PM +decl_subsys(power,NULL,NULL); + +static struct attribute *g[] = { + &auto_poweron_attr.attr, + NULL, +}; + +static struct attribute_group attr_group = { + .attrs = g, +}; + +static int __init pm_init(void) +{ + int error = subsystem_register(&power_subsys); + if (!error) + error = sysfs_create_group(&power_subsys.kset.kobj,&attr_group); + return error; +} +core_initcall(pm_init); +#else +extern struct subsystem power_subsys; + +static int __init apo_pm_init(void) +{ + return (subsys_create_file(&power_subsys, &auto_poweron_attr)); +} +__initcall(apo_pm_init); +#endif -- cgit v1.2.3