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![Axel Lin](/assets/img/avatar_default.png)
Use ACPI_FAILURE() to replace !ACPI_SUCCESS(), this avoid !! operations. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
671 lines
18 KiB
C
671 lines
18 KiB
C
/*
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* Panasonic HotKey and LCD brightness control driver
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* (C) 2004 Hiroshi Miura <miura@da-cha.org>
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* (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
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* (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
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* (C) 2004 David Bronaugh <dbronaugh>
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* (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
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*
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* derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
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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 version 2 as
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* publicshed by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 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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* ChangeLog:
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* Sep.23, 2008 Harald Welte <laforge@gnumonks.org>
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* -v0.95 rename driver from drivers/acpi/pcc_acpi.c to
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* drivers/misc/panasonic-laptop.c
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*
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* Jul.04, 2008 Harald Welte <laforge@gnumonks.org>
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* -v0.94 replace /proc interface with device attributes
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* support {set,get}keycode on th input device
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*
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* Jun.27, 2008 Harald Welte <laforge@gnumonks.org>
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* -v0.92 merge with 2.6.26-rc6 input API changes
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* remove broken <= 2.6.15 kernel support
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* resolve all compiler warnings
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* various coding style fixes (checkpatch.pl)
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* add support for backlight api
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* major code restructuring
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*
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* Dac.28, 2007 Harald Welte <laforge@gnumonks.org>
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* -v0.91 merge with 2.6.24-rc6 ACPI changes
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*
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* Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
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* -v0.9 remove warning about section reference.
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* remove acpi_os_free
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* add /proc/acpi/pcc/brightness interface for HAL access
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* merge dbronaugh's enhancement
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* Aug.17, 2004 David Bronaugh (dbronaugh)
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* - Added screen brightness setting interface
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* Thanks to FreeBSD crew (acpi_panasonic.c)
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* for the ideas I needed to accomplish it
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*
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* May.29, 2006 Hiroshi Miura <miura@da-cha.org>
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* -v0.8.4 follow to change keyinput structure
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* thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
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* Jacob Bower <jacob.bower@ic.ac.uk> and
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* Hiroshi Yokota for providing solutions.
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*
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* Oct.02, 2004 Hiroshi Miura <miura@da-cha.org>
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* -v0.8.2 merge code of YOKOTA Hiroshi
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* <yokota@netlab.is.tsukuba.ac.jp>.
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* Add sticky key mode interface.
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* Refactoring acpi_pcc_generate_keyinput().
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*
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* Sep.15, 2004 Hiroshi Miura <miura@da-cha.org>
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* -v0.8 Generate key input event on input subsystem.
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* This is based on yet another driver written by
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* Ryuta Nakanishi.
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*
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* Sep.10, 2004 Hiroshi Miura <miura@da-cha.org>
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* -v0.7 Change proc interface functions using seq_file
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* facility as same as other ACPI drivers.
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*
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* Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
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* -v0.6.4 Fix a silly error with status checking
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*
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* Aug.25, 2004 Hiroshi Miura <miura@da-cha.org>
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* -v0.6.3 replace read_acpi_int by standard function
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* acpi_evaluate_integer
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* some clean up and make smart copyright notice.
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* fix return value of pcc_acpi_get_key()
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* fix checking return value of acpi_bus_register_driver()
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*
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* Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
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* -v0.6.2 Add check on ACPI data (num_sifr)
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* Coding style cleanups, better error messages/handling
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* Fixed an off-by-one error in memory allocation
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*
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* Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
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* -v0.6.1 Fix a silly error with status checking
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*
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* Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
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* - v0.6 Correct brightness controls to reflect reality
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* based on information gleaned by Hiroshi Miura
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* and discussions with Hiroshi Miura
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*
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* Aug.10, 2004 Hiroshi Miura <miura@da-cha.org>
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* - v0.5 support LCD brightness control
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* based on the disclosed information by MEI.
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*
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* Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
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* - v0.4 first post version
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* add function to retrive SIFR
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*
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* Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
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* - v0.3 get proper status of hotkey
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*
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* Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
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* - v0.2 add HotKey handler
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*
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* Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
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* - v0.1 start from toshiba_acpi driver written by John Belmonte
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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/backlight.h>
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#include <linux/ctype.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#ifndef ACPI_HOTKEY_COMPONENT
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#define ACPI_HOTKEY_COMPONENT 0x10000000
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#endif
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#define _COMPONENT ACPI_HOTKEY_COMPONENT
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MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte");
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MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
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MODULE_LICENSE("GPL");
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#define LOGPREFIX "pcc_acpi: "
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/* Define ACPI PATHs */
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/* Lets note hotkeys */
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#define METHOD_HKEY_QUERY "HINF"
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#define METHOD_HKEY_SQTY "SQTY"
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#define METHOD_HKEY_SINF "SINF"
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#define METHOD_HKEY_SSET "SSET"
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#define HKEY_NOTIFY 0x80
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#define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
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#define ACPI_PCC_DEVICE_NAME "Hotkey"
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#define ACPI_PCC_CLASS "pcc"
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#define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
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/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
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ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00
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*/
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enum SINF_BITS { SINF_NUM_BATTERIES = 0,
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SINF_LCD_TYPE,
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SINF_AC_MAX_BRIGHT,
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SINF_AC_MIN_BRIGHT,
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SINF_AC_CUR_BRIGHT,
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SINF_DC_MAX_BRIGHT,
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SINF_DC_MIN_BRIGHT,
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SINF_DC_CUR_BRIGHT,
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SINF_MUTE,
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SINF_RESERVED,
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SINF_ENV_STATE,
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SINF_STICKY_KEY = 0x80,
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};
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/* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
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static int acpi_pcc_hotkey_add(struct acpi_device *device);
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static int acpi_pcc_hotkey_remove(struct acpi_device *device);
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static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
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static const struct acpi_device_id pcc_device_ids[] = {
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{ "MAT0012", 0},
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{ "MAT0013", 0},
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{ "MAT0018", 0},
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{ "MAT0019", 0},
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{ "", 0},
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};
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MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
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#ifdef CONFIG_PM_SLEEP
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static int acpi_pcc_hotkey_resume(struct device *dev);
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#endif
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static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
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static struct acpi_driver acpi_pcc_driver = {
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.name = ACPI_PCC_DRIVER_NAME,
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.class = ACPI_PCC_CLASS,
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.ids = pcc_device_ids,
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.ops = {
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.add = acpi_pcc_hotkey_add,
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.remove = acpi_pcc_hotkey_remove,
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.notify = acpi_pcc_hotkey_notify,
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},
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.drv.pm = &acpi_pcc_hotkey_pm,
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};
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static const struct key_entry panasonic_keymap[] = {
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{ KE_KEY, 0, { KEY_RESERVED } },
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{ KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
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{ KE_KEY, 2, { KEY_BRIGHTNESSUP } },
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{ KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
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{ KE_KEY, 4, { KEY_MUTE } },
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{ KE_KEY, 5, { KEY_VOLUMEDOWN } },
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{ KE_KEY, 6, { KEY_VOLUMEUP } },
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{ KE_KEY, 7, { KEY_SLEEP } },
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{ KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
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{ KE_KEY, 9, { KEY_BATTERY } },
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{ KE_KEY, 10, { KEY_SUSPEND } },
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{ KE_END, 0 }
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};
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struct pcc_acpi {
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acpi_handle handle;
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unsigned long num_sifr;
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int sticky_mode;
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u32 *sinf;
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struct acpi_device *device;
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struct input_dev *input_dev;
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struct backlight_device *backlight;
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};
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struct pcc_keyinput {
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struct acpi_hotkey *hotkey;
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};
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/* method access functions */
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static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
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{
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union acpi_object in_objs[] = {
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{ .integer.type = ACPI_TYPE_INTEGER,
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.integer.value = func, },
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{ .integer.type = ACPI_TYPE_INTEGER,
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.integer.value = val, },
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};
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struct acpi_object_list params = {
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.count = ARRAY_SIZE(in_objs),
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.pointer = in_objs,
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};
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acpi_status status = AE_OK;
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status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
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¶ms, NULL);
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return (status == AE_OK) ? 0 : -EIO;
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}
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static inline int acpi_pcc_get_sqty(struct acpi_device *device)
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{
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unsigned long long s;
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acpi_status status;
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status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
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NULL, &s);
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if (ACPI_SUCCESS(status))
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return s;
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else {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"evaluation error HKEY.SQTY\n"));
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return -EINVAL;
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}
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}
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static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
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{
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acpi_status status;
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *hkey = NULL;
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int i;
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status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
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&buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"evaluation error HKEY.SINF\n"));
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return 0;
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}
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hkey = buffer.pointer;
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if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
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status = AE_ERROR;
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goto end;
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}
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if (pcc->num_sifr < hkey->package.count) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"SQTY reports bad SINF length\n"));
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status = AE_ERROR;
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goto end;
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}
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for (i = 0; i < hkey->package.count; i++) {
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union acpi_object *element = &(hkey->package.elements[i]);
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if (likely(element->type == ACPI_TYPE_INTEGER)) {
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pcc->sinf[i] = element->integer.value;
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} else
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Invalid HKEY.SINF data\n"));
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}
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pcc->sinf[hkey->package.count] = -1;
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end:
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kfree(buffer.pointer);
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return status == AE_OK;
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}
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/* backlight API interface functions */
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/* This driver currently treats AC and DC brightness identical,
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* since we don't need to invent an interface to the core ACPI
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* logic to receive events in case a power supply is plugged in
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* or removed */
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static int bl_get(struct backlight_device *bd)
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{
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struct pcc_acpi *pcc = bl_get_data(bd);
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if (!acpi_pcc_retrieve_biosdata(pcc))
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return -EIO;
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return pcc->sinf[SINF_AC_CUR_BRIGHT];
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}
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static int bl_set_status(struct backlight_device *bd)
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{
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struct pcc_acpi *pcc = bl_get_data(bd);
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int bright = bd->props.brightness;
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int rc;
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if (!acpi_pcc_retrieve_biosdata(pcc))
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return -EIO;
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if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
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bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
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if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
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bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
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if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
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bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
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return -EINVAL;
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rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
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if (rc < 0)
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return rc;
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return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
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}
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static const struct backlight_ops pcc_backlight_ops = {
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.get_brightness = bl_get,
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.update_status = bl_set_status,
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};
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/* sysfs user interface functions */
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static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct acpi_device *acpi = to_acpi_device(dev);
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struct pcc_acpi *pcc = acpi_driver_data(acpi);
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if (!acpi_pcc_retrieve_biosdata(pcc))
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return -EIO;
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return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
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}
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static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct acpi_device *acpi = to_acpi_device(dev);
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struct pcc_acpi *pcc = acpi_driver_data(acpi);
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if (!acpi_pcc_retrieve_biosdata(pcc))
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return -EIO;
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return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
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}
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static ssize_t show_mute(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct acpi_device *acpi = to_acpi_device(dev);
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struct pcc_acpi *pcc = acpi_driver_data(acpi);
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if (!acpi_pcc_retrieve_biosdata(pcc))
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return -EIO;
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return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
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}
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static ssize_t show_sticky(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct acpi_device *acpi = to_acpi_device(dev);
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struct pcc_acpi *pcc = acpi_driver_data(acpi);
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if (!acpi_pcc_retrieve_biosdata(pcc))
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return -EIO;
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return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_STICKY_KEY]);
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}
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static ssize_t set_sticky(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct acpi_device *acpi = to_acpi_device(dev);
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struct pcc_acpi *pcc = acpi_driver_data(acpi);
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int val;
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if (count && sscanf(buf, "%i", &val) == 1 &&
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(val == 0 || val == 1)) {
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acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
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pcc->sticky_mode = val;
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}
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return count;
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}
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static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL);
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static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL);
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static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL);
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static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky);
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static struct attribute *pcc_sysfs_entries[] = {
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&dev_attr_numbatt.attr,
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&dev_attr_lcdtype.attr,
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&dev_attr_mute.attr,
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&dev_attr_sticky_key.attr,
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NULL,
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};
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static struct attribute_group pcc_attr_group = {
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.name = NULL, /* put in device directory */
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.attrs = pcc_sysfs_entries,
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};
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/* hotkey input device driver */
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static int sleep_keydown_seen;
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static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
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{
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struct input_dev *hotk_input_dev = pcc->input_dev;
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|
int rc;
|
|
unsigned long long result;
|
|
|
|
rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
|
|
NULL, &result);
|
|
if (ACPI_FAILURE(rc)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"error getting hotkey status\n"));
|
|
return;
|
|
}
|
|
|
|
/* hack: some firmware sends no key down for sleep / hibernate */
|
|
if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) {
|
|
if (result & 0x80)
|
|
sleep_keydown_seen = 1;
|
|
if (!sleep_keydown_seen)
|
|
sparse_keymap_report_event(hotk_input_dev,
|
|
result & 0xf, 0x80, false);
|
|
}
|
|
|
|
if (!sparse_keymap_report_event(hotk_input_dev,
|
|
result & 0xf, result & 0x80, false))
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unknown hotkey event: %d\n", result));
|
|
}
|
|
|
|
static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct pcc_acpi *pcc = acpi_driver_data(device);
|
|
|
|
switch (event) {
|
|
case HKEY_NOTIFY:
|
|
acpi_pcc_generate_keyinput(pcc);
|
|
break;
|
|
default:
|
|
/* nothing to do */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int acpi_pcc_init_input(struct pcc_acpi *pcc)
|
|
{
|
|
struct input_dev *input_dev;
|
|
int error;
|
|
|
|
input_dev = input_allocate_device();
|
|
if (!input_dev)
|
|
return -ENOMEM;
|
|
|
|
input_dev->name = ACPI_PCC_DRIVER_NAME;
|
|
input_dev->phys = ACPI_PCC_INPUT_PHYS;
|
|
input_dev->id.bustype = BUS_HOST;
|
|
input_dev->id.vendor = 0x0001;
|
|
input_dev->id.product = 0x0001;
|
|
input_dev->id.version = 0x0100;
|
|
|
|
error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
|
|
if (error) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to setup input device keymap\n"));
|
|
goto err_free_dev;
|
|
}
|
|
|
|
error = input_register_device(input_dev);
|
|
if (error) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to register input device\n"));
|
|
goto err_free_keymap;
|
|
}
|
|
|
|
pcc->input_dev = input_dev;
|
|
return 0;
|
|
|
|
err_free_keymap:
|
|
sparse_keymap_free(input_dev);
|
|
err_free_dev:
|
|
input_free_device(input_dev);
|
|
return error;
|
|
}
|
|
|
|
static void acpi_pcc_destroy_input(struct pcc_acpi *pcc)
|
|
{
|
|
sparse_keymap_free(pcc->input_dev);
|
|
input_unregister_device(pcc->input_dev);
|
|
/*
|
|
* No need to input_free_device() since core input API refcounts
|
|
* and free()s the device.
|
|
*/
|
|
}
|
|
|
|
/* kernel module interface */
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int acpi_pcc_hotkey_resume(struct device *dev)
|
|
{
|
|
struct pcc_acpi *pcc;
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
pcc = acpi_driver_data(to_acpi_device(dev));
|
|
if (!pcc)
|
|
return -EINVAL;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n",
|
|
pcc->sticky_mode));
|
|
|
|
return acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode);
|
|
}
|
|
#endif
|
|
|
|
static int acpi_pcc_hotkey_add(struct acpi_device *device)
|
|
{
|
|
struct backlight_properties props;
|
|
struct pcc_acpi *pcc;
|
|
int num_sifr, result;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
num_sifr = acpi_pcc_get_sqty(device);
|
|
|
|
if (num_sifr < 0 || num_sifr > 255) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr out of range"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
|
|
if (!pcc) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Couldn't allocate mem for pcc"));
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL);
|
|
if (!pcc->sinf) {
|
|
result = -ENOMEM;
|
|
goto out_hotkey;
|
|
}
|
|
|
|
pcc->device = device;
|
|
pcc->handle = device->handle;
|
|
pcc->num_sifr = num_sifr;
|
|
device->driver_data = pcc;
|
|
strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
|
|
|
|
result = acpi_pcc_init_input(pcc);
|
|
if (result) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error installing keyinput handler\n"));
|
|
goto out_sinf;
|
|
}
|
|
|
|
if (!acpi_pcc_retrieve_biosdata(pcc)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Couldn't retrieve BIOS data\n"));
|
|
result = -EIO;
|
|
goto out_input;
|
|
}
|
|
/* initialize backlight */
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
|
props.type = BACKLIGHT_PLATFORM;
|
|
props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
|
|
pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
|
|
&pcc_backlight_ops, &props);
|
|
if (IS_ERR(pcc->backlight)) {
|
|
result = PTR_ERR(pcc->backlight);
|
|
goto out_input;
|
|
}
|
|
|
|
/* read the initial brightness setting from the hardware */
|
|
pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
|
|
|
|
/* read the initial sticky key mode from the hardware */
|
|
pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY];
|
|
|
|
/* add sysfs attributes */
|
|
result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
|
|
if (result)
|
|
goto out_backlight;
|
|
|
|
return 0;
|
|
|
|
out_backlight:
|
|
backlight_device_unregister(pcc->backlight);
|
|
out_input:
|
|
acpi_pcc_destroy_input(pcc);
|
|
out_sinf:
|
|
kfree(pcc->sinf);
|
|
out_hotkey:
|
|
kfree(pcc);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_pcc_hotkey_remove(struct acpi_device *device)
|
|
{
|
|
struct pcc_acpi *pcc = acpi_driver_data(device);
|
|
|
|
if (!device || !pcc)
|
|
return -EINVAL;
|
|
|
|
sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
|
|
|
|
backlight_device_unregister(pcc->backlight);
|
|
|
|
acpi_pcc_destroy_input(pcc);
|
|
|
|
kfree(pcc->sinf);
|
|
kfree(pcc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_acpi_driver(acpi_pcc_driver);
|