2005-04-17 00:20:36 +02:00
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/*
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* acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <asm/uaccess.h>
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2008-01-17 08:51:24 +01:00
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#include <linux/thermal.h>
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2005-04-17 00:20:36 +02:00
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define ACPI_FAN_COMPONENT 0x00200000
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#define ACPI_FAN_CLASS "fan"
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#define ACPI_FAN_FILE_STATE "state"
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#define _COMPONENT ACPI_FAN_COMPONENT
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2007-02-13 04:42:12 +01:00
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ACPI_MODULE_NAME("fan");
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2005-04-17 00:20:36 +02:00
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2007-02-13 04:42:12 +01:00
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MODULE_AUTHOR("Paul Diefenbaugh");
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2007-02-13 05:50:02 +01:00
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MODULE_DESCRIPTION("ACPI Fan Driver");
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2005-04-17 00:20:36 +02:00
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MODULE_LICENSE("GPL");
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2005-08-05 06:44:28 +02:00
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static int acpi_fan_add(struct acpi_device *device);
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static int acpi_fan_remove(struct acpi_device *device, int type);
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2008-01-24 04:41:20 +01:00
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static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);
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static int acpi_fan_resume(struct acpi_device *device);
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2005-04-17 00:20:36 +02:00
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2007-07-23 14:44:41 +02:00
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static const struct acpi_device_id fan_device_ids[] = {
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{"PNP0C0B", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, fan_device_ids);
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2005-04-17 00:20:36 +02:00
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static struct acpi_driver acpi_fan_driver = {
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2007-02-13 05:33:40 +01:00
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.name = "fan",
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2005-08-05 06:44:28 +02:00
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.class = ACPI_FAN_CLASS,
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2007-07-23 14:44:41 +02:00
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.ids = fan_device_ids,
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2005-08-05 06:44:28 +02:00
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.ops = {
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.add = acpi_fan_add,
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.remove = acpi_fan_remove,
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2008-01-24 04:41:20 +01:00
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.suspend = acpi_fan_suspend,
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.resume = acpi_fan_resume,
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2005-08-05 06:44:28 +02:00
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},
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2005-04-17 00:20:36 +02:00
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};
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2008-01-17 08:51:24 +01:00
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/* thermal cooling device callbacks */
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static int fan_get_max_state(struct thermal_cooling_device *cdev, char *buf)
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{
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/* ACPI fan device only support two states: ON/OFF */
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return sprintf(buf, "1\n");
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}
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static int fan_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
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{
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struct acpi_device *device = cdev->devdata;
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int state;
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int result;
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if (!device)
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return -EINVAL;
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result = acpi_bus_get_power(device->handle, &state);
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if (result)
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return result;
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return sprintf(buf, "%s\n", state == ACPI_STATE_D3 ? "0" :
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(state == ACPI_STATE_D0 ? "1" : "unknown"));
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}
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static int
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fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
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{
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struct acpi_device *device = cdev->devdata;
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int result;
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if (!device || (state != 0 && state != 1))
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return -EINVAL;
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result = acpi_bus_set_power(device->handle,
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state ? ACPI_STATE_D0 : ACPI_STATE_D3);
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return result;
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}
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static struct thermal_cooling_device_ops fan_cooling_ops = {
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.get_max_state = fan_get_max_state,
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.get_cur_state = fan_get_cur_state,
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.set_cur_state = fan_set_cur_state,
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};
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2005-04-17 00:20:36 +02:00
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/* --------------------------------------------------------------------------
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FS Interface (/proc)
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-------------------------------------------------------------------------- */
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2008-01-17 08:51:24 +01:00
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#ifdef CONFIG_ACPI_PROCFS
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2005-04-17 00:20:36 +02:00
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2005-08-05 06:44:28 +02:00
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static struct proc_dir_entry *acpi_fan_dir;
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2005-04-17 00:20:36 +02:00
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2005-08-05 06:44:28 +02:00
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static int acpi_fan_read_state(struct seq_file *seq, void *offset)
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2005-04-17 00:20:36 +02:00
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{
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2007-10-22 12:19:15 +02:00
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struct acpi_device *device = seq->private;
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2005-08-05 06:44:28 +02:00
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int state = 0;
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2005-04-17 00:20:36 +02:00
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2007-10-22 12:19:15 +02:00
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if (device) {
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if (acpi_bus_get_power(device->handle, &state))
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2005-04-17 00:20:36 +02:00
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seq_printf(seq, "status: ERROR\n");
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else
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seq_printf(seq, "status: %s\n",
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2005-08-05 06:44:28 +02:00
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!state ? "on" : "off");
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2005-04-17 00:20:36 +02:00
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}
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2006-06-27 06:41:40 +02:00
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return 0;
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2005-04-17 00:20:36 +02:00
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}
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static int acpi_fan_state_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_fan_read_state, PDE(inode)->data);
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}
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static ssize_t
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2005-08-05 06:44:28 +02:00
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acpi_fan_write_state(struct file *file, const char __user * buffer,
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size_t count, loff_t * ppos)
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2005-04-17 00:20:36 +02:00
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{
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2005-08-05 06:44:28 +02:00
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int result = 0;
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2006-10-01 00:28:50 +02:00
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struct seq_file *m = file->private_data;
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2007-10-22 12:19:15 +02:00
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struct acpi_device *device = m->private;
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ACPI: fix acpi fan state set error
Under /proc/acpi, there is a fan control interface, a user can
set 0 or 3 to /proc/acpi/fan/*/state, 0 denotes D0 state, 3
denotes D3 state, but in current implementation, a user can
set a fan to D1 state by any char excluding '1', '2' and '3'.
For example:
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "xxxxx" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
Obviously, such inputs as "" and "xxxxx" are invalid for fan state.
This patch fixes this issue, it strictly limits fan state only to
accept 0, 1, 2 and 3, any other inputs are invalid.
Before applying this patch, the test result is:
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "xxxxx" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "3x" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "-1x" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]#
After applying this patch, the test result is:
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "" > /proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "xxxxx" > /proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "-1x" > /proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "0" > //proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost ~]# echo "4" > //proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost ~]# echo "3" > //proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "0" > //proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost ~]# echo "3x" > //proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]#
Signed-off-by: Yi Yang <yi.y.yang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-14 06:52:06 +02:00
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char state_string[3] = { '\0' };
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2005-04-17 00:20:36 +02:00
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2007-10-22 12:19:15 +02:00
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if (count > sizeof(state_string) - 1)
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2006-06-27 06:41:40 +02:00
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return -EINVAL;
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2005-08-05 06:44:28 +02:00
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2005-04-17 00:20:36 +02:00
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if (copy_from_user(state_string, buffer, count))
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2006-06-27 06:41:40 +02:00
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return -EFAULT;
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2005-08-05 06:44:28 +02:00
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2005-04-17 00:20:36 +02:00
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state_string[count] = '\0';
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ACPI: fix acpi fan state set error
Under /proc/acpi, there is a fan control interface, a user can
set 0 or 3 to /proc/acpi/fan/*/state, 0 denotes D0 state, 3
denotes D3 state, but in current implementation, a user can
set a fan to D1 state by any char excluding '1', '2' and '3'.
For example:
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "xxxxx" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
Obviously, such inputs as "" and "xxxxx" are invalid for fan state.
This patch fixes this issue, it strictly limits fan state only to
accept 0, 1, 2 and 3, any other inputs are invalid.
Before applying this patch, the test result is:
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "xxxxx" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "3x" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost acpi]# echo "-1x" > /proc/acpi/fan/C31B/state
[root@localhost acpi]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost acpi]#
After applying this patch, the test result is:
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "" > /proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "3" > /proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "xxxxx" > /proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "-1x" > /proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "0" > //proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost ~]# echo "4" > //proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost ~]# echo "3" > //proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: off
[root@localhost ~]# echo "0" > //proc/acpi/fan/C31B/state
[root@localhost ~]# cat /proc/acpi/fan/C31B/state
status: on
[root@localhost ~]# echo "3x" > //proc/acpi/fan/C31B/state
-bash: echo: write error: Invalid argument
[root@localhost ~]#
Signed-off-by: Yi Yang <yi.y.yang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-14 06:52:06 +02:00
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if ((state_string[0] < '0') || (state_string[0] > '3'))
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return -EINVAL;
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if (state_string[1] == '\n')
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state_string[1] = '\0';
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if (state_string[1] != '\0')
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return -EINVAL;
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2005-08-05 06:44:28 +02:00
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2007-10-22 12:19:15 +02:00
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result = acpi_bus_set_power(device->handle,
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2005-08-05 06:44:28 +02:00
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simple_strtoul(state_string, NULL, 0));
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2005-04-17 00:20:36 +02:00
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if (result)
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2006-06-27 06:41:40 +02:00
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return result;
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2005-04-17 00:20:36 +02:00
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2006-06-27 06:41:40 +02:00
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return count;
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2005-04-17 00:20:36 +02:00
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}
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2006-07-04 19:06:00 +02:00
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static const struct file_operations acpi_fan_state_ops = {
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2005-08-05 06:44:28 +02:00
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.open = acpi_fan_state_open_fs,
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.read = seq_read,
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.write = acpi_fan_write_state,
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.llseek = seq_lseek,
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.release = single_release,
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2005-04-17 00:20:36 +02:00
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.owner = THIS_MODULE,
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};
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2005-08-05 06:44:28 +02:00
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static int acpi_fan_add_fs(struct acpi_device *device)
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2005-04-17 00:20:36 +02:00
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{
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2005-08-05 06:44:28 +02:00
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struct proc_dir_entry *entry = NULL;
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2005-04-17 00:20:36 +02:00
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if (!device)
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2006-06-27 06:41:40 +02:00
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return -EINVAL;
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2005-04-17 00:20:36 +02:00
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if (!acpi_device_dir(device)) {
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acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
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2005-08-05 06:44:28 +02:00
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acpi_fan_dir);
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2005-04-17 00:20:36 +02:00
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|
|
if (!acpi_device_dir(device))
|
2006-06-27 06:41:40 +02:00
|
|
|
return -ENODEV;
|
2005-04-17 00:20:36 +02:00
|
|
|
acpi_device_dir(device)->owner = THIS_MODULE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 'status' [R/W] */
|
2008-04-29 10:02:27 +02:00
|
|
|
entry = proc_create_data(ACPI_FAN_FILE_STATE,
|
|
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
|
|
acpi_device_dir(device),
|
|
|
|
&acpi_fan_state_ops,
|
|
|
|
device);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!entry)
|
2006-06-27 06:41:40 +02:00
|
|
|
return -ENODEV;
|
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2005-08-05 06:44:28 +02:00
|
|
|
static int acpi_fan_remove_fs(struct acpi_device *device)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
|
|
|
|
if (acpi_device_dir(device)) {
|
2005-08-05 06:44:28 +02:00
|
|
|
remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device));
|
2005-04-17 00:20:36 +02:00
|
|
|
remove_proc_entry(acpi_device_bid(device), acpi_fan_dir);
|
|
|
|
acpi_device_dir(device) = NULL;
|
|
|
|
}
|
|
|
|
|
2006-06-27 06:41:40 +02:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2008-01-17 08:51:24 +01:00
|
|
|
#else
|
|
|
|
static int acpi_fan_add_fs(struct acpi_device *device)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-01-17 08:51:24 +01:00
|
|
|
static int acpi_fan_remove_fs(struct acpi_device *device)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
2005-04-17 00:20:36 +02:00
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Driver Interface
|
|
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
2005-08-05 06:44:28 +02:00
|
|
|
static int acpi_fan_add(struct acpi_device *device)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2005-08-05 06:44:28 +02:00
|
|
|
int result = 0;
|
|
|
|
int state = 0;
|
2008-01-17 08:51:24 +01:00
|
|
|
struct thermal_cooling_device *cdev;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (!device)
|
2006-06-27 06:41:40 +02:00
|
|
|
return -EINVAL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2005-08-05 06:37:45 +02:00
|
|
|
strcpy(acpi_device_name(device), "Fan");
|
2005-04-17 00:20:36 +02:00
|
|
|
strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
|
|
|
|
|
2006-05-19 22:54:42 +02:00
|
|
|
result = acpi_bus_get_power(device->handle, &state);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (result) {
|
2006-06-27 05:41:38 +02:00
|
|
|
printk(KERN_ERR PREFIX "Reading power state\n");
|
2005-04-17 00:20:36 +02:00
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
2008-01-24 04:41:20 +01:00
|
|
|
device->flags.force_power_state = 1;
|
|
|
|
acpi_bus_set_power(device->handle, state);
|
|
|
|
device->flags.force_power_state = 0;
|
|
|
|
|
2008-01-17 08:51:24 +01:00
|
|
|
cdev = thermal_cooling_device_register("Fan", device,
|
|
|
|
&fan_cooling_ops);
|
2008-02-15 07:01:52 +01:00
|
|
|
if (IS_ERR(cdev)) {
|
|
|
|
result = PTR_ERR(cdev);
|
|
|
|
goto end;
|
|
|
|
}
|
2008-04-11 04:09:24 +02:00
|
|
|
|
2008-05-02 06:02:41 +02:00
|
|
|
dev_info(&device->dev, "registered as cooling_device%d\n", cdev->id);
|
2008-04-11 04:09:24 +02:00
|
|
|
|
2008-09-22 23:37:34 +02:00
|
|
|
device->driver_data = cdev;
|
2008-04-11 04:09:24 +02:00
|
|
|
result = sysfs_create_link(&device->dev.kobj,
|
|
|
|
&cdev->device.kobj,
|
|
|
|
"thermal_cooling");
|
|
|
|
if (result)
|
2008-05-02 06:02:41 +02:00
|
|
|
dev_err(&device->dev, "Failed to create sysfs link "
|
|
|
|
"'thermal_cooling'\n");
|
2008-04-11 04:09:24 +02:00
|
|
|
|
|
|
|
result = sysfs_create_link(&cdev->device.kobj,
|
|
|
|
&device->dev.kobj,
|
|
|
|
"device");
|
|
|
|
if (result)
|
2008-05-02 06:02:41 +02:00
|
|
|
dev_err(&device->dev, "Failed to create sysfs link "
|
|
|
|
"'device'\n");
|
2008-01-17 08:51:24 +01:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
result = acpi_fan_add_fs(device);
|
|
|
|
if (result)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
|
2005-08-05 06:44:28 +02:00
|
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
|
|
!device->power.state ? "on" : "off");
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2005-08-05 06:44:28 +02:00
|
|
|
end:
|
2006-06-27 06:41:40 +02:00
|
|
|
return result;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2005-08-05 06:44:28 +02:00
|
|
|
static int acpi_fan_remove(struct acpi_device *device, int type)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2008-01-17 08:51:24 +01:00
|
|
|
struct thermal_cooling_device *cdev = acpi_driver_data(device);
|
|
|
|
|
|
|
|
if (!device || !cdev)
|
2006-06-27 06:41:40 +02:00
|
|
|
return -EINVAL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
acpi_fan_remove_fs(device);
|
2008-01-17 08:51:24 +01:00
|
|
|
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
|
|
|
|
sysfs_remove_link(&cdev->device.kobj, "device");
|
|
|
|
thermal_cooling_device_unregister(cdev);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-06-27 06:41:40 +02:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2008-01-24 04:41:20 +01:00
|
|
|
static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
|
|
|
|
{
|
|
|
|
if (!device)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
acpi_bus_set_power(device->handle, ACPI_STATE_D0);
|
|
|
|
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int acpi_fan_resume(struct acpi_device *device)
|
|
|
|
{
|
|
|
|
int result = 0;
|
|
|
|
int power_state = 0;
|
|
|
|
|
|
|
|
if (!device)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
result = acpi_bus_get_power(device->handle, &power_state);
|
|
|
|
if (result) {
|
2008-09-28 08:51:56 +02:00
|
|
|
printk(KERN_ERR PREFIX
|
|
|
|
"Error reading fan power state\n");
|
2008-01-24 04:41:20 +01:00
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
device->flags.force_power_state = 1;
|
|
|
|
acpi_bus_set_power(device->handle, power_state);
|
|
|
|
device->flags.force_power_state = 0;
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
2005-08-05 06:44:28 +02:00
|
|
|
static int __init acpi_fan_init(void)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2005-08-05 06:37:45 +02:00
|
|
|
int result = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
|
2008-02-02 10:05:54 +01:00
|
|
|
#ifdef CONFIG_ACPI_PROCFS
|
2005-04-17 00:20:36 +02:00
|
|
|
acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
|
|
|
|
if (!acpi_fan_dir)
|
2006-06-27 06:41:40 +02:00
|
|
|
return -ENODEV;
|
2005-04-17 00:20:36 +02:00
|
|
|
acpi_fan_dir->owner = THIS_MODULE;
|
2008-02-02 10:05:54 +01:00
|
|
|
#endif
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
result = acpi_bus_register_driver(&acpi_fan_driver);
|
|
|
|
if (result < 0) {
|
|
|
|
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
|
2006-06-27 06:41:40 +02:00
|
|
|
return -ENODEV;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-06-27 06:41:40 +02:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2005-08-05 06:44:28 +02:00
|
|
|
static void __exit acpi_fan_exit(void)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
|
|
|
|
acpi_bus_unregister_driver(&acpi_fan_driver);
|
|
|
|
|
|
|
|
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
|
|
|
|
|
2006-06-27 06:41:40 +02:00
|
|
|
return;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(acpi_fan_init);
|
|
|
|
module_exit(acpi_fan_exit);
|