mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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6b3a3e12f8
Inspired by (bd75b4ef49: Constify static attribute_group structs),
accepted by linux-next, reported:
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20220210202805.7750-4-rikard.falkeborn@gmail.com/
Nearly all singletons of type struct attribute_group are never modified,
and so are candidates for being const. Declare them as const.
Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220307231414.86560-1-rmclure@linux.ibm.com
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Interface for power-management for ppc64 compliant platform
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*
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* Manish Ahuja <mahuja@us.ibm.com>
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*
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* Feb 2007
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*
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* Copyright (C) 2007 IBM Corporation.
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*/
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#include <linux/kobject.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <asm/machdep.h>
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#include "pseries.h"
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unsigned long rtas_poweron_auto; /* default and normal state is 0 */
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static ssize_t auto_poweron_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return sprintf(buf, "%lu\n", rtas_poweron_auto);
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}
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static ssize_t auto_poweron_store(struct kobject *kobj,
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struct kobj_attribute *attr,
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const char *buf, size_t n)
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{
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int ret;
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unsigned long ups_restart;
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ret = sscanf(buf, "%lu", &ups_restart);
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if ((ret == 1) && ((ups_restart == 1) || (ups_restart == 0))){
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rtas_poweron_auto = ups_restart;
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return n;
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}
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return -EINVAL;
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}
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static struct kobj_attribute auto_poweron_attr =
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__ATTR(auto_poweron, 0644, auto_poweron_show, auto_poweron_store);
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#ifndef CONFIG_PM
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struct kobject *power_kobj;
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static struct attribute *g[] = {
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&auto_poweron_attr.attr,
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NULL,
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};
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static const struct attribute_group attr_group = {
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.attrs = g,
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};
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static int __init pm_init(void)
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{
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power_kobj = kobject_create_and_add("power", NULL);
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if (!power_kobj)
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return -ENOMEM;
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return sysfs_create_group(power_kobj, &attr_group);
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}
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machine_core_initcall(pseries, pm_init);
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#else
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static int __init apo_pm_init(void)
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{
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return (sysfs_create_file(power_kobj, &auto_poweron_attr.attr));
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}
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machine_device_initcall(pseries, apo_pm_init);
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#endif
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