diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/power.c')
-rw-r--r-- | arch/powerpc/platforms/pseries/power.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/power.c b/arch/powerpc/platforms/pseries/power.c new file mode 100644 index 0000000000..3676cb2977 --- /dev/null +++ b/arch/powerpc/platforms/pseries/power.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Interface for power-management for ppc64 compliant platform + * + * Manish Ahuja <mahuja@us.ibm.com> + * + * Feb 2007 + * + * Copyright (C) 2007 IBM Corporation. + */ + +#include <linux/kobject.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <asm/machdep.h> + +#include "pseries.h" + +unsigned long rtas_poweron_auto; /* default and normal state is 0 */ + +static ssize_t auto_poweron_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%lu\n", rtas_poweron_auto); +} + +static ssize_t auto_poweron_store(struct kobject *kobj, + struct kobj_attribute *attr, + 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 kobj_attribute auto_poweron_attr = + __ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store); + +#ifndef CONFIG_PM +struct kobject *power_kobj; + +static struct attribute *g[] = { + &auto_poweron_attr.attr, + NULL, +}; + +static const struct attribute_group attr_group = { + .attrs = g, +}; + +static int __init pm_init(void) +{ + power_kobj = kobject_create_and_add("power", NULL); + if (!power_kobj) + return -ENOMEM; + return sysfs_create_group(power_kobj, &attr_group); +} +machine_core_initcall(pseries, pm_init); +#else +static int __init apo_pm_init(void) +{ + return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr)); +} +machine_device_initcall(pseries, apo_pm_init); +#endif |