=== 8< ===

lenovo-sl-laptop: Extra driver for Lenovo SL series laptop

This driver provides support for the following functions.
 - Hotkeys: LenovoCare, Volumn up/down/mute, Battery, Suspend, WLAN switch,
            Video switch, Pointer switch (as KEY_PROG1), Dock eject (as
            KEY_PROG2), Hibernate, Lock screen, Screen Zoom and LCD brightness
            up/down.
 - Radio RFKILL: switching on/off UWB, bluetooth and wifi.
 - LenovoCare LEDs: On, off, Dimmed blinking and standard blinking.
                    (Blinking supported with ledtrig_timer)
 - Fan speed: Reading current fan speed

The original author of this driver is Alexandre Rostovtsev

The Lenovo ThinkPad SL series laptops are not supported by the normal
thinkpad_acpi driver because their firmware is quite different from the
T-series/R-series/X-series ThinkPads. [3]

[3] http://mailman.linux-thinkpad.org/pipermail/linux-thinkpad/2009-January/046122.html


Signed-off-by: Ike Panhc <ike.pan@canonical.com>

---
 drivers/platform/x86/Kconfig            |   12 +
 drivers/platform/x86/Makefile           |    1 +
 drivers/platform/x86/lenovo-sl-laptop.c |  721 +++++++++++++++++++++++++++++++
 3 files changed, 734 insertions(+), 0 deletions(-)
 create mode 100644 drivers/platform/x86/lenovo-sl-laptop.c

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 55ca39d..1ae72e3 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -143,6 +143,18 @@ config HP_WMI
 	 To compile this driver as a module, choose M here: the module will
 	 be called hp-wmi.
 
+config LENOVO_SL_LAPTOP
+	tristate "Lenovo ThinkPad SL Series Laptop Extras"
+	depends on ACPI
+	select HWMON
+	select INPUT
+	select RFKILL
+	---help---
+	  This is a driver for the Lenovo ThinkPad SL series laptops
+	  (SL300/400/500), which are not supported by the thinkpad_acpi
+	  driver. This driver adds support for hotkeys, rfkill control,
+	  the Lenovo Care LED, fan speed.
+
 config MSI_LAPTOP
 	tristate "MSI Laptop Extras"
 	depends on ACPI
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index d1c1621..1037739 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_DELL_WMI)		+= dell-wmi.o
 obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o
 obj-$(CONFIG_ACERHDF)		+= acerhdf.o
 obj-$(CONFIG_HP_WMI)		+= hp-wmi.o
+obj-$(CONFIG_LENOVO_SL_LAPTOP)	+= lenovo-sl-laptop.o
 obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o
 obj-$(CONFIG_SONY_LAPTOP)	+= sony-laptop.o
 obj-$(CONFIG_THINKPAD_ACPI)	+= thinkpad_acpi.o
diff --git a/drivers/platform/x86/lenovo-sl-laptop.c b/drivers/platform/x86/lenovo-sl-laptop.c
new file mode 100644
index 0000000..d8fc093
--- /dev/null
+++ b/drivers/platform/x86/lenovo-sl-laptop.c
@@ -0,0 +1,721 @@
+/*
+ *  lenovo-sl-laptop.c - Lenovo ThinkPad SL Series Extras Driver
+ *
+ *
+ *  Copyright (C) 2008-2009 Alexandre Rostovtsev <tetromino@gmail.com>
+ *                     2009 Ike Panhc <ike.pan@canonical.com>
+ *
+ *  Largely based on thinkpad_acpi.c, eeepc-laptop.c, and video.c which
+ *  are copyright their respective authors.
+ *
+ *  The original website of this driver is at
+ *  http://github.com/tetromino/lenovo-sl-laptop/tree/master
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  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., 51 Franklin Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/pci_ids.h>
+#include <linux/rfkill.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/uaccess.h>
+
+#define LENOVO_SL_MODULE_DESC "Lenovo ThinkPad SL Series Extras driver"
+#define LENOVO_SL_MODULE_NAME "lenovo-sl-laptop"
+#define ACPI_EC0_PATH "\\_SB.PCI0.SBRG.EC0"
+#define ACPI_HKEY_PATH ACPI_EC0_PATH ".HKEY"
+#define LENOVO_SL_MAX_ACPI_ARGS 3
+
+MODULE_AUTHOR("Alexandre Rostovtsev");
+MODULE_AUTHOR("Ike Panhc");
+MODULE_DESCRIPTION(LENOVO_SL_MODULE_DESC);
+MODULE_LICENSE("GPL");
+
+/* general */
+
+static acpi_handle lenovo_sl_laptop_hkey_handle;
+static acpi_handle lenovo_sl_laptop_ec0_handle;
+static struct platform_device *lenovo_sl_laptop_pdev;
+
+static int lensl_acpi_int_func(acpi_handle handle, char *pathname,
+			       int *ret, int n_arg, ...)
+{
+	acpi_status status;
+	struct acpi_object_list params;
+	union acpi_object in_obj[LENOVO_SL_MAX_ACPI_ARGS], out_obj;
+	struct acpi_buffer result, *resultp;
+	int i;
+	va_list ap;
+
+	if (!handle)
+		return -EINVAL;
+	if (n_arg < 0 || n_arg > LENOVO_SL_MAX_ACPI_ARGS)
+		return -EINVAL;
+	va_start(ap, n_arg);
+	for (i = 0; i < n_arg; i++) {
+		in_obj[i].integer.value = va_arg(ap, int);
+		in_obj[i].type = ACPI_TYPE_INTEGER;
+	}
+	va_end(ap);
+	params.count = n_arg;
+	params.pointer = in_obj;
+
+	if (ret) {
+		result.length = sizeof(out_obj);
+		result.pointer = &out_obj;
+		resultp = &result;
+	} else
+		resultp = NULL;
+
+	status = acpi_evaluate_object(handle, pathname, &params, resultp);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+	if (ret)
+		*ret = out_obj.integer.value;
+
+	return 0;
+}
+
+/*************************************************************************
+    Bluetooth, WWAN, UWB
+ *************************************************************************/
+
+/* ACPI GBDC/SBDC, GWAN/SWAN, GUWB/SUWB bits */
+#define	LENOVO_SL_RADIO_HWPRESENT  (0x01) /* hardware is available */
+#define	LENOVO_SL_RADIO_RADIOSSW   (0x02) /* radio is enabled */
+#define	LENOVO_SL_RADIO_RESUMECTRL (0x04) /* state at resume: off/last state */
+
+struct lensl_radio {
+	int type;
+	enum rfkill_type rfktype;
+	char *rfkname;
+	struct rfkill *rfk;
+	char *get_pathname;
+	char *set_pathname;
+};
+
+static int radio_get_acpi(char *pathname, int *value)
+{
+	return lensl_acpi_int_func(lenovo_sl_laptop_hkey_handle, pathname,
+				   value, 0);
+}
+
+static int radio_set_acpi(char *pathname, int value)
+{
+	return lensl_acpi_int_func(lenovo_sl_laptop_hkey_handle, pathname,
+				   NULL, 1, value);
+}
+
+static int radio_get(struct lensl_radio *radio, bool *sw_blocked,
+			   bool *hw_blocked)
+{
+	int wlsw;
+	int value;
+
+	if (!radio)
+		return -EINVAL;
+	if (!radio_get_acpi("WLSW", &wlsw) && wlsw)
+		*hw_blocked = 0;
+	else
+		*hw_blocked = 1;
+	if (radio_get_acpi(radio->get_pathname, &value))
+		return -ENODEV;
+	if (!(value & LENOVO_SL_RADIO_HWPRESENT))
+		return -ENODEV;
+	if (value & LENOVO_SL_RADIO_RADIOSSW)
+		*sw_blocked = 0;
+	else
+		*sw_blocked = 1;
+	return 0;
+}
+
+static int radio_set(struct lensl_radio *radio, bool blocked)
+{
+	int res, value;
+
+	res = radio_get_acpi(radio->get_pathname, &value);
+	if (res)
+		return res;
+
+	if (blocked)
+		value &= ~LENOVO_SL_RADIO_RADIOSSW;
+	else
+		value |= LENOVO_SL_RADIO_RADIOSSW;
+	if (radio_set_acpi(radio->set_pathname, value))
+		return -EIO;
+
+	return 0;
+}
+
+/* Bluetooth/WWAN/UWB rfkill interface */
+
+static void radio_rfkill_query(struct rfkill *rfk, void *data)
+{
+	struct lensl_radio *radio = data;
+	int res;
+	bool sw_blocked, hw_blocked;
+
+	if (!radio)
+		return;
+
+	res = radio_get(radio, &sw_blocked, &hw_blocked);
+	if (res)
+		return;
+
+	rfkill_set_states(rfk, sw_blocked, hw_blocked);
+}
+
+static int radio_rfkill_set_block(void *data, bool blocked)
+{
+	struct lensl_radio *radio = data;
+	int res;
+	bool sw_blocked, hw_blocked;
+
+	if (!radio)
+		return -EINVAL;
+
+	res = radio_get(radio, &sw_blocked, &hw_blocked);
+	if (res)
+		return res;
+
+	if (hw_blocked)
+		return 0;
+	if (sw_blocked == blocked)
+		return 0;
+
+	return radio_set(radio, sw_blocked);
+}
+
+static struct rfkill_ops radio_rfkops = {
+	.poll = radio_rfkill_query,
+	.query = radio_rfkill_query,
+	.set_block = radio_rfkill_set_block,
+};
+
+/* Bluetooth/WWAN/UWB init and exit and HW switch notification */
+
+static struct lensl_radio radio_radios[3] = {
+#define RADIO_BLUETOOTH (0)
+	{
+		.type = RADIO_BLUETOOTH,
+		.rfktype = RFKILL_TYPE_BLUETOOTH,
+		.rfkname = "lenovo-sl-bluetooth",
+		.get_pathname = "GBDC",
+		.set_pathname = "SBDC",
+	},
+#define RADIO_WWAN (1)
+	{
+		.type = RADIO_WWAN,
+		.rfktype = RFKILL_TYPE_WWAN,
+		.rfkname = "lenovo-sl-wwan",
+		.get_pathname = "GWAN",
+		.set_pathname = "SWAN",
+	},
+#define RADIO_UWB (2)
+	{
+		.type = RADIO_UWB,
+		.rfktype = RFKILL_TYPE_UWB,
+		.rfkname = "lenovo-sl-uwb",
+		.get_pathname = "GUWB",
+		.set_pathname = "SUWB",
+	},
+};
+
+static void radio_exit(int type)
+{
+	if (radio_radios[type].rfk) {
+		rfkill_unregister(radio_radios[type].rfk);
+		rfkill_destroy(radio_radios[type].rfk);
+		radio_radios[type].rfk = NULL;
+	}
+}
+
+static int radio_init(int type)
+{
+	int res;
+	bool sw_blocked, hw_blocked;
+
+	if (!lenovo_sl_laptop_hkey_handle)
+		return -ENODEV;
+
+	/* 1st: Get the sw/hw status */
+	res = radio_get(&radio_radios[type], &sw_blocked, &hw_blocked);
+	if (res)
+		return res;
+
+	/* 2nd: allocate rfkill */
+	radio_radios[type].rfk = rfkill_alloc(radio_radios[type].rfkname,
+					      &lenovo_sl_laptop_pdev->dev,
+					      radio_radios[type].rfktype,
+					      &radio_rfkops,
+					      &radio_radios[type]);
+	if (!(radio_radios[type].rfk)) {
+		pr_err("Failed to allocate memory for rfkill class\n");
+		return -ENOMEM;
+	}
+
+	/* 3rd: Set status */
+	rfkill_init_sw_state(radio_radios[type].rfk, sw_blocked);
+	rfkill_set_hw_state(radio_radios[type].rfk, hw_blocked);
+
+	/* 4th: Register rfkill */
+	res = rfkill_register(radio_radios[type].rfk);
+	if (res < 0) {
+		pr_err("Failed to register %s rfkill switch: %d\n",
+			radio_radios[type].rfkname, res);
+		rfkill_destroy(radio_radios[type].rfk);
+		radio_radios[type].rfk = NULL;
+	}
+
+	return res;
+}
+
+/*************************************************************************
+    LEDs
+ *************************************************************************/
+#ifdef CONFIG_NEW_LEDS
+
+#define LED_OFF   0
+#define LED_ON    0x02
+#define LED_BLINK 0x01
+#define LED_DIM   0x100
+
+/* equivalent to the ThinkVantage LED on other ThinkPads */
+#define LED_NAME "lensl::lenovocare"
+#define LED_WQ_NAME "lenovo-sl-led-wq"
+
+static struct workqueue_struct *led_wq;
+
+struct {
+	struct led_classdev cdev;
+	enum led_brightness brightness;
+	int supported, new_code;
+	struct work_struct work;
+} led_tv;
+
+static inline int led_set_tvls(int code)
+{
+	return lensl_acpi_int_func(lenovo_sl_laptop_hkey_handle, "TVLS", NULL,
+				   1, code);
+}
+
+static void led_tv_worker(struct work_struct *work)
+{
+	if (!led_tv.supported)
+		return;
+	led_set_tvls(led_tv.new_code);
+	if (led_tv.new_code)
+		led_tv.brightness = LED_FULL;
+	else
+		led_tv.brightness = LED_OFF;
+}
+
+static void led_tv_brightness_set_sysfs(struct led_classdev *led_cdev,
+					enum led_brightness brightness)
+{
+	switch (brightness) {
+	case LED_OFF:
+		led_tv.new_code = LED_OFF;
+		break;
+	case LED_FULL:
+		led_tv.new_code = LED_ON;
+		break;
+	default:
+		return;
+	}
+	queue_work(led_wq, &led_tv.work);
+}
+
+static enum led_brightness led_tv_brightness_get_sysfs(
+						struct led_classdev *led_cdev)
+{
+	return led_tv.brightness;
+}
+
+static int led_tv_blink_set_sysfs(struct led_classdev *led_cdev,
+				  unsigned long *delay_on,
+				  unsigned long *delay_off)
+{
+	if (*delay_on == 0 && *delay_off == 0) {
+		/* If we can choose the flash rate, use dimmed blinking --
+		   it looks better */
+		led_tv.new_code = LED_ON |
+			LED_BLINK | LED_DIM;
+		*delay_on = 2000;
+		*delay_off = 2000;
+	} else if (*delay_on + *delay_off == 4000) {
+		/* User wants dimmed blinking */
+		led_tv.new_code = LED_ON |
+			LED_BLINK | LED_DIM;
+	} else if (*delay_on == 7250 && *delay_off == 500) {
+		/* User wants standard blinking mode */
+		led_tv.new_code = LED_ON | LED_BLINK;
+	} else
+		return -EINVAL;
+	queue_work(led_wq, &led_tv.work);
+	return 0;
+}
+
+static void led_exit(void)
+{
+	led_set_tvls(LED_OFF);
+	destroy_workqueue(led_wq);
+	if (led_tv.supported) {
+		led_classdev_unregister(&led_tv.cdev);
+		led_tv.supported = 0;
+	}
+}
+
+static int led_init(void)
+{
+	int res;
+
+	led_wq = create_singlethread_workqueue(LED_WQ_NAME);
+	if (!led_wq) {
+		pr_err("Failed to create a workqueue\n");
+		return -ENOMEM;
+	}
+
+	memset(&led_tv, 0, sizeof(led_tv));
+	led_tv.cdev.brightness_get = led_tv_brightness_get_sysfs;
+	led_tv.cdev.brightness_set = led_tv_brightness_set_sysfs;
+	led_tv.cdev.blink_set = led_tv_blink_set_sysfs;
+	led_tv.cdev.name = LED_NAME;
+	INIT_WORK(&led_tv.work, led_tv_worker);
+	led_set_tvls(LED_ON);
+	res = led_classdev_register(&lenovo_sl_laptop_pdev->dev, &led_tv.cdev);
+	if (res) {
+		pr_warning("Failed to register LED device\n");
+		return res;
+	}
+	led_tv.supported = 1;
+	return 0;
+}
+
+#else /* CONFIG_NEW_LEDS */
+
+static void led_exit(void)
+{
+}
+
+static int led_init(void)
+{
+	return -ENODEV;
+}
+
+#endif /* CONFIG_NEW_LEDS */
+
+/*************************************************************************
+    hwmon & fans
+ *************************************************************************/
+
+static struct device *hwmon_device;
+
+static inline int hwmon_get_tach(int *value, int fan)
+{
+	return lensl_acpi_int_func(lenovo_sl_laptop_ec0_handle, "TACH", value,
+				   1, fan);
+}
+
+static ssize_t hwmon_fan1_input_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	int res;
+	int rpm;
+
+	res = hwmon_get_tach(&rpm, 0);
+	if (res)
+		return res;
+	return snprintf(buf, PAGE_SIZE, "%u\n", rpm);
+}
+
+static struct device_attribute hwmon_fan1_input =
+	__ATTR(fan1_input, S_IRUGO, hwmon_fan1_input_show, NULL);
+
+static struct attribute *hwmon_attributes[] = {
+	&hwmon_fan1_input.attr,
+	NULL
+};
+
+static const struct attribute_group hwmon_attr_group = {
+	.attrs = hwmon_attributes,
+};
+
+static void hwmon_exit(void)
+{
+	if (!hwmon_device)
+		return;
+
+	sysfs_remove_group(&hwmon_device->kobj, &hwmon_attr_group);
+	hwmon_device_unregister(hwmon_device);
+	hwmon_device = NULL;
+}
+
+static int hwmon_init(void)
+{
+	int res;
+
+	hwmon_device = hwmon_device_register(&lenovo_sl_laptop_pdev->dev);
+	if (!hwmon_device) {
+		pr_err("Failed to register hwmon device\n");
+		return -ENODEV;
+	}
+
+	res = sysfs_create_group(&hwmon_device->kobj, &hwmon_attr_group);
+	if (res < 0) {
+		pr_err("Failed to create hwmon sysfs group\n");
+		hwmon_device_unregister(hwmon_device);
+		hwmon_device = NULL;
+		return -ENODEV;
+	}
+	return 0;
+}
+
+/*************************************************************************
+    hotkeys
+ *************************************************************************/
+
+typedef int (*acpi_ec_query_func) (void *data);
+extern int acpi_ec_add_query_handler(void *ec, u8 query_bit,
+				     acpi_handle handle,
+				     acpi_ec_query_func func,
+				     void *data);
+extern void acpi_ec_remove_query_handler(void *ec, u8 query_bit);
+
+struct key_entry {
+	char type;
+	u8 scancode;
+	int keycode;
+};
+
+enum { KE_KEY, KE_END };
+
+static struct input_dev *hkey_inputdev;
+
+static struct key_entry hkey_keymap[] = {
+	{KE_KEY, 0x0B, KEY_COFFEE },
+	{KE_KEY, 0x0C, KEY_BATTERY },
+	{KE_KEY, 0x0D, KEY_SLEEP },
+	{KE_KEY, 0x0E, KEY_WLAN },
+	{KE_KEY, 0x10, KEY_SWITCHVIDEOMODE },
+	{KE_KEY, 0x11, KEY_PROG1 },
+	{KE_KEY, 0x12, KEY_PROG2 },
+	{KE_KEY, 0x15, KEY_SUSPEND },
+	{KE_KEY, 0x69, KEY_VOLUMEUP },
+	{KE_KEY, 0x6A, KEY_VOLUMEDOWN },
+	{KE_KEY, 0x6B, KEY_MUTE },
+	{KE_KEY, 0x6C, KEY_BRIGHTNESSDOWN },
+	{KE_KEY, 0x6D, KEY_BRIGHTNESSUP },
+	{KE_KEY, 0x71, KEY_ZOOM },
+	{KE_KEY, 0x80, KEY_VENDOR },
+	{KE_END, 0},
+};
+
+static int hkey_action(void *data)
+{
+	int keycode;
+	struct key_entry *this_key = data;
+
+	if (!data)
+		return -EINVAL;
+	keycode = this_key->keycode;
+
+	if (keycode != KEY_RESERVED) {
+		input_report_key(hkey_inputdev, keycode, 1);
+		input_sync(hkey_inputdev);
+		input_report_key(hkey_inputdev, keycode, 0);
+		input_sync(hkey_inputdev);
+	}
+
+	return 0;
+}
+
+static int hkey_add(struct acpi_device *device)
+{
+	int result;
+	struct key_entry *key;
+
+	for (key = hkey_keymap; key->type != KE_END; key++) {
+		result = acpi_ec_add_query_handler(
+				acpi_driver_data(device->parent),
+				key->scancode, NULL,
+				hkey_action, key);
+		if (result) {
+			pr_err("Failed to register hotkey notification.\n");
+			return -ENODEV;
+		}
+	}
+	return 0;
+}
+
+static int hkey_remove(struct acpi_device *device, int type)
+{
+	struct key_entry *key;
+
+	for (key = hkey_keymap; key->type != KE_END; key++) {
+		acpi_ec_remove_query_handler(
+			acpi_driver_data(device->parent),
+			key->scancode);
+	}
+	return 0;
+}
+
+static const struct acpi_device_id hkey_ids[] = {
+	{"LEN0014", 0},
+	{"", 0},
+};
+
+static struct acpi_driver hkey_driver = {
+	.name = "lenovo-sl-laptop-hotkey",
+	.class = "lenovo",
+	.ids = hkey_ids,
+	.owner = THIS_MODULE,
+	.ops = {
+		.add = hkey_add,
+		.remove = hkey_remove,
+	},
+};
+
+static void hkey_inputdev_exit(void)
+{
+	if (hkey_inputdev)
+		input_unregister_device(hkey_inputdev);
+}
+
+static int hkey_inputdev_init(void)
+{
+	int result;
+	struct key_entry *key;
+
+	hkey_inputdev = input_allocate_device();
+	if (!hkey_inputdev) {
+		pr_err("Failed to allocate hotkey input device\n");
+		return -ENODEV;
+	}
+	hkey_inputdev->name = "Lenovo ThinkPad SL Series extra buttons";
+	hkey_inputdev->phys = LENOVO_SL_MODULE_NAME "/input0";
+	hkey_inputdev->uniq = LENOVO_SL_MODULE_NAME;
+	hkey_inputdev->id.bustype = BUS_HOST;
+	hkey_inputdev->id.vendor = PCI_VENDOR_ID_LENOVO;
+	hkey_inputdev->dev.parent = &lenovo_sl_laptop_pdev->dev;
+	set_bit(EV_KEY, hkey_inputdev->evbit);
+
+	for (key = hkey_keymap; key->type != KE_END; key++)
+		set_bit(key->keycode, hkey_inputdev->keybit);
+
+	result = input_register_device(hkey_inputdev);
+	if (result) {
+		pr_err("Failed to register hotkey input device\n");
+		input_free_device(hkey_inputdev);
+		hkey_inputdev = NULL;
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static void hkey_init(void)
+{
+	int result;
+
+	result = hkey_inputdev_init();
+	if (result) {
+		pr_err("Failed to register input device for hotkeys\n");
+		return;
+	}
+	result = acpi_bus_register_driver(&hkey_driver);
+	if (result)
+		pr_err("Failed to register hotkey driver\n");
+	return;
+}
+
+static void hkey_exit(void)
+{
+	hkey_inputdev_exit();
+	acpi_bus_unregister_driver(&hkey_driver);
+}
+
+/*************************************************************************
+    init/exit
+ *************************************************************************/
+
+static int __init lenovo_sl_laptop_init(void)
+{
+	int ret;
+	acpi_status status;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	lenovo_sl_laptop_hkey_handle = lenovo_sl_laptop_ec0_handle = NULL;
+	status = acpi_get_handle(NULL, ACPI_HKEY_PATH,
+				 &lenovo_sl_laptop_hkey_handle);
+	if (ACPI_FAILURE(status)) {
+		pr_err("Failed to get ACPI handle for %s\n", ACPI_HKEY_PATH);
+		return -ENODEV;
+	}
+	status = acpi_get_handle(NULL, ACPI_EC0_PATH,
+				 &lenovo_sl_laptop_ec0_handle);
+	if (ACPI_FAILURE(status)) {
+		pr_err("Failed to get ACPI handle for %s\n", ACPI_EC0_PATH);
+		return -ENODEV;
+	}
+
+	lenovo_sl_laptop_pdev = platform_device_register_simple(
+							LENOVO_SL_MODULE_NAME,
+							-1, NULL, 0);
+	if (IS_ERR(lenovo_sl_laptop_pdev)) {
+		ret = PTR_ERR(lenovo_sl_laptop_pdev);
+		lenovo_sl_laptop_pdev = NULL;
+		pr_err("Failed to register platform device\n");
+		return ret;
+	}
+
+	radio_init(RADIO_BLUETOOTH);
+	radio_init(RADIO_WWAN);
+	radio_init(RADIO_UWB);
+
+	hkey_init();
+	led_init();
+	hwmon_init();
+
+	return 0;
+}
+
+static void __exit lenovo_sl_laptop_exit(void)
+{
+	hwmon_exit();
+	led_exit();
+	hkey_exit();
+
+	radio_exit(RADIO_UWB);
+	radio_exit(RADIO_WWAN);
+	radio_exit(RADIO_BLUETOOTH);
+
+	if (lenovo_sl_laptop_pdev)
+		platform_device_unregister(lenovo_sl_laptop_pdev);
+}
+
+MODULE_DEVICE_TABLE(acpi, hkey_ids);
+
+module_init(lenovo_sl_laptop_init);
+module_exit(lenovo_sl_laptop_exit);
