--- /dev/null
+/*
+ * 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,
+ ¶ms, NULL);
+
+ return (status == AE_OK) ? 0 : -EIO;
+}
+
+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;
+ }
+}
+
+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;
+}
+
+/* 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];
+}
+
+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);
+}
+
+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]);
+}
+
+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]);
+}
+
+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]);
+}
+
+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]);
+}
+
+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;
+}
+
+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_SUCCESS(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);
Code Review / kvmfornfv.git / blobdiff