1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Interface for power-management for ppc64 compliant platform
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Manish Ahuja <mahuja@us.ibm.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Feb 2007
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Copyright (C) 2007 IBM Corporation.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/kobject.h>
13*4882a593Smuzhiyun #include <linux/string.h>
14*4882a593Smuzhiyun #include <linux/errno.h>
15*4882a593Smuzhiyun #include <linux/init.h>
16*4882a593Smuzhiyun #include <asm/machdep.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #include "pseries.h"
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun unsigned long rtas_poweron_auto; /* default and normal state is 0 */
21*4882a593Smuzhiyun
auto_poweron_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)22*4882a593Smuzhiyun static ssize_t auto_poweron_show(struct kobject *kobj,
23*4882a593Smuzhiyun struct kobj_attribute *attr, char *buf)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun return sprintf(buf, "%lu\n", rtas_poweron_auto);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
auto_poweron_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t n)28*4882a593Smuzhiyun static ssize_t auto_poweron_store(struct kobject *kobj,
29*4882a593Smuzhiyun struct kobj_attribute *attr,
30*4882a593Smuzhiyun const char *buf, size_t n)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun int ret;
33*4882a593Smuzhiyun unsigned long ups_restart;
34*4882a593Smuzhiyun ret = sscanf(buf, "%lu", &ups_restart);
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){
37*4882a593Smuzhiyun rtas_poweron_auto = ups_restart;
38*4882a593Smuzhiyun return n;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun return -EINVAL;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun static struct kobj_attribute auto_poweron_attr =
44*4882a593Smuzhiyun __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun #ifndef CONFIG_PM
47*4882a593Smuzhiyun struct kobject *power_kobj;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static struct attribute *g[] = {
50*4882a593Smuzhiyun &auto_poweron_attr.attr,
51*4882a593Smuzhiyun NULL,
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static struct attribute_group attr_group = {
55*4882a593Smuzhiyun .attrs = g,
56*4882a593Smuzhiyun };
57*4882a593Smuzhiyun
pm_init(void)58*4882a593Smuzhiyun static int __init pm_init(void)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun power_kobj = kobject_create_and_add("power", NULL);
61*4882a593Smuzhiyun if (!power_kobj)
62*4882a593Smuzhiyun return -ENOMEM;
63*4882a593Smuzhiyun return sysfs_create_group(power_kobj, &attr_group);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun machine_core_initcall(pseries, pm_init);
66*4882a593Smuzhiyun #else
apo_pm_init(void)67*4882a593Smuzhiyun static int __init apo_pm_init(void)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr));
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun machine_device_initcall(pseries, apo_pm_init);
72*4882a593Smuzhiyun #endif
73