linux/drivers/acpi/cm_sbs.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
Based on 3 normalized pattern(s):

  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 either version 2 of the license or at
  your option any later version 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

  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 either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] 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

  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 either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

88 lines
2.1 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#define PREFIX "ACPI: "
ACPI_MODULE_NAME("cm_sbs");
#define ACPI_AC_CLASS "ac_adapter"
#define ACPI_BATTERY_CLASS "battery"
#define _COMPONENT ACPI_SBS_COMPONENT
static struct proc_dir_entry *acpi_ac_dir;
static struct proc_dir_entry *acpi_battery_dir;
static DEFINE_MUTEX(cm_sbs_mutex);
static int lock_ac_dir_cnt;
static int lock_battery_dir_cnt;
struct proc_dir_entry *acpi_lock_ac_dir(void)
{
mutex_lock(&cm_sbs_mutex);
if (!acpi_ac_dir)
acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
if (acpi_ac_dir) {
lock_ac_dir_cnt++;
} else {
printk(KERN_ERR PREFIX
"Cannot create %s\n", ACPI_AC_CLASS);
}
mutex_unlock(&cm_sbs_mutex);
return acpi_ac_dir;
}
EXPORT_SYMBOL(acpi_lock_ac_dir);
void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
{
mutex_lock(&cm_sbs_mutex);
if (acpi_ac_dir_param)
lock_ac_dir_cnt--;
if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
acpi_ac_dir = NULL;
}
mutex_unlock(&cm_sbs_mutex);
}
EXPORT_SYMBOL(acpi_unlock_ac_dir);
struct proc_dir_entry *acpi_lock_battery_dir(void)
{
mutex_lock(&cm_sbs_mutex);
if (!acpi_battery_dir) {
acpi_battery_dir =
proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
}
if (acpi_battery_dir) {
lock_battery_dir_cnt++;
} else {
printk(KERN_ERR PREFIX
"Cannot create %s\n", ACPI_BATTERY_CLASS);
}
mutex_unlock(&cm_sbs_mutex);
return acpi_battery_dir;
}
EXPORT_SYMBOL(acpi_lock_battery_dir);
void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
{
mutex_lock(&cm_sbs_mutex);
if (acpi_battery_dir_param)
lock_battery_dir_cnt--;
if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
&& acpi_battery_dir) {
remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
acpi_battery_dir = NULL;
}
mutex_unlock(&cm_sbs_mutex);
return;
}
EXPORT_SYMBOL(acpi_unlock_battery_dir);