cregit-Linux how code gets into the kernel

Release 4.11 drivers/platform/x86/panasonic-laptop.c

Directory: drivers/platform/x86
/*
 *  Panasonic HotKey and LCD brightness control driver
 *  (C) 2004 Hiroshi Miura <miura@da-cha.org>
 *  (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
 *  (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
 *  (C) 2004 David Bronaugh <dbronaugh>
 *  (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
 *
 *  derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  publicshed by the Free Software Foundation.
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 *
 *---------------------------------------------------------------------------
 *
 * ChangeLog:
 *      Sep.23, 2008    Harald Welte <laforge@gnumonks.org>
 *              -v0.95  rename driver from drivers/acpi/pcc_acpi.c to
 *                      drivers/misc/panasonic-laptop.c
 *
 *      Jul.04, 2008    Harald Welte <laforge@gnumonks.org>
 *              -v0.94  replace /proc interface with device attributes
 *                      support {set,get}keycode on th input device
 *
 *      Jun.27, 2008    Harald Welte <laforge@gnumonks.org>
 *              -v0.92  merge with 2.6.26-rc6 input API changes
 *                      remove broken <= 2.6.15 kernel support
 *                      resolve all compiler warnings
 *                      various coding style fixes (checkpatch.pl)
 *                      add support for backlight api
 *                      major code restructuring
 *
 *      Dac.28, 2007    Harald Welte <laforge@gnumonks.org>
 *              -v0.91  merge with 2.6.24-rc6 ACPI changes
 *
 *      Nov.04, 2006    Hiroshi Miura <miura@da-cha.org>
 *              -v0.9   remove warning about section reference.
 *                      remove acpi_os_free
 *                      add /proc/acpi/pcc/brightness interface for HAL access
 *                      merge dbronaugh's enhancement
 *                      Aug.17, 2004 David Bronaugh (dbronaugh)
 *                              - Added screen brightness setting interface
 *                                Thanks to FreeBSD crew (acpi_panasonic.c)
 *                                for the ideas I needed to accomplish it
 *
 *      May.29, 2006    Hiroshi Miura <miura@da-cha.org>
 *              -v0.8.4 follow to change keyinput structure
 *                      thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
 *                      Jacob Bower <jacob.bower@ic.ac.uk> and
 *                      Hiroshi Yokota for providing solutions.
 *
 *      Oct.02, 2004    Hiroshi Miura <miura@da-cha.org>
 *              -v0.8.2 merge code of YOKOTA Hiroshi
 *                                      <yokota@netlab.is.tsukuba.ac.jp>.
 *                      Add sticky key mode interface.
 *                      Refactoring acpi_pcc_generate_keyinput().
 *
 *      Sep.15, 2004    Hiroshi Miura <miura@da-cha.org>
 *              -v0.8   Generate key input event on input subsystem.
 *                      This is based on yet another driver written by
 *                                                      Ryuta Nakanishi.
 *
 *      Sep.10, 2004    Hiroshi Miura <miura@da-cha.org>
 *              -v0.7   Change proc interface functions using seq_file
 *                      facility as same as other ACPI drivers.
 *
 *      Aug.28, 2004    Hiroshi Miura <miura@da-cha.org>
 *              -v0.6.4 Fix a silly error with status checking
 *
 *      Aug.25, 2004    Hiroshi Miura <miura@da-cha.org>
 *              -v0.6.3 replace read_acpi_int by standard function
 *                                                      acpi_evaluate_integer
 *                      some clean up and make smart copyright notice.
 *                      fix return value of pcc_acpi_get_key()
 *                      fix checking return value of acpi_bus_register_driver()
 *
 *      Aug.22, 2004    David Bronaugh <dbronaugh@linuxboxen.org>
 *              -v0.6.2 Add check on ACPI data (num_sifr)
 *                      Coding style cleanups, better error messages/handling
 *                      Fixed an off-by-one error in memory allocation
 *
 *      Aug.21, 2004    David Bronaugh <dbronaugh@linuxboxen.org>
 *              -v0.6.1 Fix a silly error with status checking
 *
 *      Aug.20, 2004    David Bronaugh <dbronaugh@linuxboxen.org>
 *              - v0.6  Correct brightness controls to reflect reality
 *                      based on information gleaned by Hiroshi Miura
 *                      and discussions with Hiroshi Miura
 *
 *      Aug.10, 2004    Hiroshi Miura <miura@da-cha.org>
 *              - v0.5  support LCD brightness control
 *                      based on the disclosed information by MEI.
 *
 *      Jul.25, 2004    Hiroshi Miura <miura@da-cha.org>
 *              - v0.4  first post version
 *                      add function to retrive SIFR
 *
 *      Jul.24, 2004    Hiroshi Miura <miura@da-cha.org>
 *              - v0.3  get proper status of hotkey
 *
 *      Jul.22, 2004    Hiroshi Miura <miura@da-cha.org>
 *              - v0.2  add HotKey handler
 *
 *      Jul.17, 2004    Hiroshi Miura <miura@da-cha.org>
 *              - v0.1  start from toshiba_acpi driver written by John Belmonte
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/backlight.h>
#include <linux/ctype.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>

#ifndef ACPI_HOTKEY_COMPONENT

#define ACPI_HOTKEY_COMPONENT	0x10000000
#endif


#define _COMPONENT		ACPI_HOTKEY_COMPONENT

MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte");
MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
MODULE_LICENSE("GPL");


#define LOGPREFIX "pcc_acpi: "

/* Define ACPI PATHs */
/* Lets note hotkeys */

#define METHOD_HKEY_QUERY	"HINF"

#define METHOD_HKEY_SQTY	"SQTY"

#define METHOD_HKEY_SINF	"SINF"

#define METHOD_HKEY_SSET	"SSET"

#define HKEY_NOTIFY		 0x80


#define ACPI_PCC_DRIVER_NAME	"Panasonic Laptop Support"

#define ACPI_PCC_DEVICE_NAME	"Hotkey"

#define ACPI_PCC_CLASS		"pcc"


#define ACPI_PCC_INPUT_PHYS	"panasonic/hkey0"

/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
   ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00
*/


enum SINF_BITS { SINF_NUM_BATTERIES = 0,
		 
SINF_LCD_TYPE,
		 
SINF_AC_MAX_BRIGHT,
		 
SINF_AC_MIN_BRIGHT,
		 
SINF_AC_CUR_BRIGHT,
		 
SINF_DC_MAX_BRIGHT,
		 
SINF_DC_MIN_BRIGHT,
		 
SINF_DC_CUR_BRIGHT,
		 
SINF_MUTE,
		 
SINF_RESERVED,
		 
SINF_ENV_STATE,
		 
SINF_STICKY_KEY = 0x80,
        };
/* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */

static int acpi_pcc_hotkey_add(struct acpi_device *device);
static int acpi_pcc_hotkey_remove(struct acpi_device *device);
static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);


static const struct acpi_device_id pcc_device_ids[] = {
	{ "MAT0012", 0},
	{ "MAT0013", 0},
	{ "MAT0018", 0},
	{ "MAT0019", 0},
	{ "", 0},
};
MODULE_DEVICE_TABLE(acpi, pcc_device_ids);

#ifdef CONFIG_PM_SLEEP
static int acpi_pcc_hotkey_resume(struct device *dev);
#endif
static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);


static struct acpi_driver acpi_pcc_driver = {
	.name =		ACPI_PCC_DRIVER_NAME,
	.class =	ACPI_PCC_CLASS,
	.ids =		pcc_device_ids,
	.ops =		{
				.add =		acpi_pcc_hotkey_add,
				.remove =	acpi_pcc_hotkey_remove,
				.notify =	acpi_pcc_hotkey_notify,
                        },
	.drv.pm =	&acpi_pcc_hotkey_pm,
};


static const struct key_entry panasonic_keymap[] = {
	{ KE_KEY, 0, { KEY_RESERVED } },
	{ KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
	{ KE_KEY, 2, { KEY_BRIGHTNESSUP } },
	{ KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
	{ KE_KEY, 4, { KEY_MUTE } },
	{ KE_KEY, 5, { KEY_VOLUMEDOWN } },
	{ KE_KEY, 6, { KEY_VOLUMEUP } },
	{ KE_KEY, 7, { KEY_SLEEP } },
	{ KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
	{ KE_KEY, 9, { KEY_BATTERY } },
	{ KE_KEY, 10, { KEY_SUSPEND } },
	{ KE_END, 0 }
};


struct pcc_acpi {
	
acpi_handle		handle;
	
unsigned long		num_sifr;
	
int			sticky_mode;
	
u32			*sinf;
	
struct acpi_device	*device;
	
struct input_dev	*input_dev;
	
struct backlight_device	*backlight;
};


struct pcc_keyinput {
	
struct acpi_hotkey      *hotkey;
};

/* method access functions */



static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
{
	union acpi_object in_objs[] = {
		{ .integer.type  = ACPI_TYPE_INTEGER,
		  .integer.value = func, },
		{ .integer.type  = ACPI_TYPE_INTEGER,
		  .integer.value = val, },
        };
	struct acpi_object_list params = {
		.count   = ARRAY_SIZE(in_objs),
		.pointer = in_objs,
        };
	acpi_status status = AE_OK;

	status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
				      &params, NULL);

	return (status == AE_OK) ? 0 : -EIO;
}


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Harald Welte10193.52%150.00%


Axel Lin76.48%150.00%


Total108100.00%2100.00%






static inline int acpi_pcc_get_sqty(struct acpi_device *device)
{
	unsigned long long s;
	acpi_status status;

	status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
				       NULL, &s);
	if (ACPI_SUCCESS(status))
		return s;
	else {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "evaluation error HKEY.SQTY\n"));
		return -EINVAL;
	}
}


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Harald Welte6198.39%150.00%


Len Brown11.61%150.00%


Total62100.00%2100.00%






static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
{
	acpi_status status;
	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
	union acpi_object *hkey = NULL;
	int i;

	status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
				      &buffer);
	if (ACPI_FAILURE(status)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "evaluation error HKEY.SINF\n"));
		return 0;
	}

	hkey = buffer.pointer;
	if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
		status = AE_ERROR;
		goto end;
	}

	if (pcc->num_sifr < hkey->package.count) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				 "SQTY reports bad SINF length\n"));
		status = AE_ERROR;
		goto end;
	}

	for (i = 0; i < hkey->package.count; i++) {
		union acpi_object *element = &(hkey->package.elements[i]);
		if (likely(element->type == ACPI_TYPE_INTEGER)) {
			pcc->sinf[i] = element->integer.value;
		} else
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					 "Invalid HKEY.SINF data\n"));
	}
	pcc->sinf[hkey->package.count] = -1;

end:
	kfree(buffer.pointer);
	return status == AE_OK;
}


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Jean Delvare83.36%250.00%


Hannes Eder10.42%125.00%


Total238100.00%4100.00%



/* backlight API interface functions */

/* This driver currently treats AC and DC brightness identical,
 * since we don't need to invent an interface to the core ACPI
 * logic to receive events in case a power supply is plugged in
 * or removed */




static int bl_get(struct backlight_device *bd)
{
	struct pcc_acpi *pcc = bl_get_data(bd);

	if (!acpi_pcc_retrieve_biosdata(pcc))
		return -EIO;

	return pcc->sinf[SINF_AC_CUR_BRIGHT];
}


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Harald Welte41100.00%1100.00%


Total41100.00%1100.00%






static int bl_set_status(struct backlight_device *bd)
{
	struct pcc_acpi *pcc = bl_get_data(bd);
	int bright = bd->props.brightness;
	int rc;

	if (!acpi_pcc_retrieve_biosdata(pcc))
		return -EIO;

	if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
		bright = pcc->sinf[SINF_AC_MIN_BRIGHT];

	if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
		bright = pcc->sinf[SINF_DC_MIN_BRIGHT];

	if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
	    bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
		return -EINVAL;

	rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
	if (rc < 0)
		return rc;

	return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
}


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Harald Welte139100.00%1100.00%


Total139100.00%1100.00%




static const struct backlight_ops pcc_backlight_ops = {
	.get_brightness	= bl_get,
	.update_status	= bl_set_status,
};


/* sysfs user interface functions */




static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct acpi_device *acpi = to_acpi_device(dev);
	struct pcc_acpi *pcc = acpi_driver_data(acpi);

	if (!acpi_pcc_retrieve_biosdata(pcc))
		return -EIO;

	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
}


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Harald Welte69100.00%2100.00%


Total69100.00%2100.00%






static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct acpi_device *acpi = to_acpi_device(dev);
	struct pcc_acpi *pcc = acpi_driver_data(acpi);

	if (!acpi_pcc_retrieve_biosdata(pcc))
		return -EIO;

	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
}


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Harald Welte69100.00%2100.00%


Total69100.00%2100.00%






static ssize_t show_mute(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct acpi_device *acpi = to_acpi_device(dev);
	struct pcc_acpi *pcc = acpi_driver_data(acpi);

	if (!acpi_pcc_retrieve_biosdata(pcc))
		return -EIO;

	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
}


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Harald Welte69100.00%2100.00%


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static ssize_t show_sticky(struct device *dev, struct device_attribute *attr,
			   char *buf)
{
	struct acpi_device *acpi = to_acpi_device(dev);
	struct pcc_acpi *pcc = acpi_driver_data(acpi);

	if (!acpi_pcc_retrieve_biosdata(pcc))
		return -EIO;

	return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_STICKY_KEY]);
}


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Harald Welte69100.00%2100.00%


Total69100.00%2100.00%






static ssize_t set_sticky(struct device *dev, struct device_attribute *attr,
			  const char *buf, size_t count)
{
	struct acpi_device *acpi = to_acpi_device(dev);
	struct pcc_acpi *pcc = acpi_driver_data(acpi);
	int val;

	if (count && sscanf(buf, "%i", &val) == 1 &&
	    (val == 0 || val == 1)) {
		acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
		pcc->sticky_mode = val;
	}

	return count;
}


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static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL);
static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL);
static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL);
static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky);


static struct attribute *pcc_sysfs_entries[] = {
	&dev_attr_numbatt.attr,
	&dev_attr_lcdtype.attr,
	&dev_attr_mute.attr,
	&dev_attr_sticky_key.attr,
	NULL,
};


static struct attribute_group pcc_attr_group = {
	.name	= NULL,		/* put in device directory */
	.attrs	= pcc_sysfs_entries,
};


/* hotkey input device driver */


static int sleep_keydown_seen;



static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
{
	struct input_dev *hotk_input_dev = pcc->input_dev;
	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));
}


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Stefan Seyfried4934.75%120.00%


Dmitry Torokhov149.93%120.00%


Len Brown10.71%120.00%


Axel Lin10.71%120.00%


Total141100.00%5100.00%






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;
	}
}


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Björn Helgaas819.05%150.00%


Total42100.00%2100.00%






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;
}


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Harald Welte9359.24%150.00%


Dmitry Torokhov6440.76%150.00%


Total157100.00%2100.00%






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.
         */
}


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Total26100.00%2100.00%



/* 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);
}

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Rafael J. Wysocki2028.99%133.33%


Axel Lin11.45%133.33%


Total69100.00%3100.00%



#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;
}


Contributors
PersonTokensPropCommitsCommitProp
Harald Welte31078.09%112.50%


Matthew Garrett5714.36%225.00%


Bruno Prémont112.77%112.50%


Dmitry Torokhov71.76%112.50%


Xi Wang51.26%112.50%


Jean Delvare51.26%112.50%


Len Brown20.50%112.50%


Total397100.00%8100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Harald Welte7298.63%150.00%


Dmitry Torokhov11.37%150.00%


Total73100.00%2100.00%




module_acpi_driver(acpi_pcc_driver);

Overall Contributors
PersonTokensPropCommitsCommitProp
Harald Welte202282.06%314.29%


Dmitry Torokhov2018.16%14.76%


Rafael J. Wysocki582.35%29.52%


Matthew Garrett572.31%29.52%


Stefan Seyfried532.15%14.76%


Björn Helgaas230.93%14.76%


Jean Delvare130.53%29.52%


Bruno Prémont120.49%14.76%


Axel Lin90.37%29.52%


Xi Wang50.20%14.76%


Len Brown40.16%14.76%


Tejun Heo30.12%14.76%


Andy Shevchenko20.08%14.76%


Lv Zheng10.04%14.76%


Hannes Eder10.04%14.76%


Total2464100.00%21100.00%


Directory: drivers/platform/x86



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