diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
new file mode 100644
index 0000000..3215f9c
--- /dev/null
+++ b/drivers/hwmon/applesmc.c
@@ -0,0 +1,1339 @@
+/*
+ * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
+ * sensors, fan control, keyboard backlight control) used in Intel-based Apple
+ * computers.
+ *
+ * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>
+ *
+ * Based on hdaps.c driver:
+ * Copyright (C) 2005 Robert Love <rml@novell.com>
+ * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
+ *
+ * Fan control based on smcFanControl:
+ * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License v2 as published 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/dmi.h>
+#include <linux/mutex.h>
+#include <linux/hwmon-sysfs.h>
+#include <asm/io.h>
+#include <linux/leds.h>
+#include <linux/hwmon.h>
+#include <linux/workqueue.h>
+
+/* data port used by Apple SMC */
+#define APPLESMC_DATA_PORT	0x300
+/* command/status port used by Apple SMC */
+#define APPLESMC_CMD_PORT	0x304
+
+#define APPLESMC_NR_PORTS	32 /* 0x300-0x31f */
+
+#define APPLESMC_MAX_DATA_LENGTH 32
+
+#define APPLESMC_STATUS_MASK	0x0f
+#define APPLESMC_READ_CMD	0x10
+#define APPLESMC_WRITE_CMD	0x11
+#define APPLESMC_GET_KEY_BY_INDEX_CMD	0x12
+#define APPLESMC_GET_KEY_TYPE_CMD	0x13
+
+#define KEY_COUNT_KEY		"#KEY" /* r-o ui32 */
+
+#define LIGHT_SENSOR_LEFT_KEY	"ALV0" /* r-o {alv (6 bytes) */
+#define LIGHT_SENSOR_RIGHT_KEY	"ALV1" /* r-o {alv (6 bytes) */
+#define BACKLIGHT_KEY 		"LKSB" /* w-o {lkb (2 bytes) */
+
+#define CLAMSHELL_KEY 		"MSLD" /* r-o ui8 (unused) */
+
+#define MOTION_SENSOR_X_KEY	"MO_X" /* r-o sp78 (2 bytes) */
+#define MOTION_SENSOR_Y_KEY	"MO_Y" /* r-o sp78 (2 bytes) */
+#define MOTION_SENSOR_Z_KEY	"MO_Z" /* r-o sp78 (2 bytes) */
+#define MOTION_SENSOR_KEY	"MOCN" /* r/w ui16 */
+
+#define FANS_COUNT		"FNum" /* r-o ui8 */
+#define FANS_MANUAL		"FS! " /* r-w ui16 */
+#define FAN_ACTUAL_SPEED	"F0Ac" /* r-o fpe2 (2 bytes) */
+#define FAN_MIN_SPEED		"F0Mn" /* r-o fpe2 (2 bytes) */
+#define FAN_MAX_SPEED		"F0Mx" /* r-o fpe2 (2 bytes) */
+#define FAN_SAFE_SPEED		"F0Sf" /* r-o fpe2 (2 bytes) */
+#define FAN_TARGET_SPEED	"F0Tg" /* r-w fpe2 (2 bytes) */
+#define FAN_POSITION		"F0ID" /* r-o char[16] */
+
+/*
+ * Temperature sensors keys (sp78 - 2 bytes).
+ * First set for Macbook(Pro), second for Macmini.
+ */
+static const char* temperature_sensors_sets[][13] = {
+	{ "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
+	  "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
+	{ "TC0D", "TC0P", NULL }
+};
+
+/* List of keys used to read/write fan speeds */
+static const char* fan_speed_keys[] = {
+	FAN_ACTUAL_SPEED,
+	FAN_MIN_SPEED,
+	FAN_MAX_SPEED,
+	FAN_SAFE_SPEED,
+	FAN_TARGET_SPEED
+};
+
+#define INIT_TIMEOUT_MSECS	5000	/* wait up to 5s for device init ... */
+#define INIT_WAIT_MSECS		50	/* ... in 50ms increments */
+
+#define APPLESMC_POLL_PERIOD	(HZ/20)	/* poll for input every 1/20s */
+#define APPLESMC_INPUT_FUZZ	4	/* input event threshold */
+#define APPLESMC_INPUT_FLAT	4
+
+#define SENSOR_X 0
+#define SENSOR_Y 1
+#define SENSOR_Z 2
+
+/* Structure to be passed to DMI_MATCH function */
+struct dmi_match_data {
+/* Indicates whether this computer has an accelerometer. */
+	int accelerometer;
+/* Indicates whether this computer has light sensors and keyboard backlight. */
+	int light;
+/* Indicates which temperature sensors set to use. */
+	int temperature_set;
+};
+
+static const int debug;
+static struct platform_device *pdev;
+static s16 rest_x;
+static s16 rest_y;
+static struct timer_list applesmc_timer;
+static struct input_dev *applesmc_idev;
+static struct class_device *hwmon_class_dev;
+
+/* Indicates whether this computer has an accelerometer. */
+static unsigned int applesmc_accelerometer;
+
+/* Indicates whether this computer has light sensors and keyboard backlight. */
+static unsigned int applesmc_light;
+
+/* Indicates which temperature sensors set to use. */
+static unsigned int applesmc_temperature_set;
+
+static struct mutex applesmc_lock;
+
+/*
+ * Last index written to key_at_index sysfs file, and value to use for all other
+ * key_at_index_* sysfs files.
+ */
+static unsigned int key_at_index;
+
+static struct workqueue_struct *applesmc_led_wq;
+
+/*
+ * __wait_status - Wait up to 2ms for the status port to get a certain value
+ * (masked with 0x0f), returning zero if the value is obtained.  Callers must
+ * hold applesmc_lock.
+ */
+static int __wait_status(u8 val)
+{
+	unsigned int i;
+
+	val = val & APPLESMC_STATUS_MASK;
+
+	for (i = 0; i < 200; i++) {
+		if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
+			if (debug)
+				printk(KERN_DEBUG
+						"Waited %d us for status %x\n",
+						i*10, val);
+			return 0;
+		}
+		udelay(10);
+	}
+
+	printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
+						val, inb(APPLESMC_CMD_PORT));
+
+	return -EIO;
+}
+
+/*
+ * applesmc_read_key - reads len bytes from a given key, and put them in buffer.
+ * Returns zero on success or a negative error on failure. Callers must
+ * hold applesmc_lock.
+ */
+static int applesmc_read_key(const char* key, u8* buffer, u8 len)
+{
+	int i;
+
+	if (len > APPLESMC_MAX_DATA_LENGTH) {
+		printk(KERN_ERR	"applesmc_read_key: cannot read more than "
+					"%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
+		return -EINVAL;
+	}
+
+	outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
+	if (__wait_status(0x0c))
+		return -EIO;
+
+	for (i = 0; i < 4; i++) {
+		outb(key[i], APPLESMC_DATA_PORT);
+		if (__wait_status(0x04))
+			return -EIO;
+	}
+	if (debug)
+		printk(KERN_DEBUG "<%s", key);
+
+	outb(len, APPLESMC_DATA_PORT);
+	if (debug)
+		printk(KERN_DEBUG ">%x", len);
+
+	for (i = 0; i < len; i++) {
+		if (__wait_status(0x05))
+			return -EIO;
+		buffer[i] = inb(APPLESMC_DATA_PORT);
+		if (debug)
+			printk(KERN_DEBUG "<%x", buffer[i]);
+	}
+	if (debug)
+		printk(KERN_DEBUG "\n");
+
+	return 0;
+}
+
+/*
+ * applesmc_write_key - writes len bytes from buffer to a given key.
+ * Returns zero on success or a negative error on failure. Callers must
+ * hold applesmc_lock.
+ */
+static int applesmc_write_key(const char* key, u8* buffer, u8 len)
+{
+	int i;
+
+	if (len > APPLESMC_MAX_DATA_LENGTH) {
+		printk(KERN_ERR	"applesmc_write_key: cannot write more than "
+					"%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
+		return -EINVAL;
+	}
+
+	outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
+	if (__wait_status(0x0c))
+		return -EIO;
+
+	for (i = 0; i < 4; i++) {
+		outb(key[i], APPLESMC_DATA_PORT);
+		if (__wait_status(0x04))
+			return -EIO;
+	}
+
+	outb(len, APPLESMC_DATA_PORT);
+
+	for (i = 0; i < len; i++) {
+		if (__wait_status(0x04))
+			return -EIO;
+		outb(buffer[i], APPLESMC_DATA_PORT);
+	}
+
+	return 0;
+}
+
+/*
+ * applesmc_get_key_at_index - get key at index, and put the result in key
+ * (char[6]). Returns zero on success or a negative error on failure. Callers
+ * must hold applesmc_lock.
+ */
+static int applesmc_get_key_at_index(int index, char* key)
+{
+	int i;
+	u8 readkey[4];
+	readkey[0] = index >> 24;
+	readkey[1] = index >> 16;
+	readkey[2] = index >> 8;
+	readkey[3] = index;
+
+	outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
+	if (__wait_status(0x0c))
+		return -EIO;
+
+	for (i = 0; i < 4; i++) {
+		outb(readkey[i], APPLESMC_DATA_PORT);
+		if (__wait_status(0x04))
+			return -EIO;
+	}
+
+	outb(4, APPLESMC_DATA_PORT);
+
+	for (i = 0; i < 4; i++) {
+		if (__wait_status(0x05))
+			return -EIO;
+		key[i] = inb(APPLESMC_DATA_PORT);
+	}
+	key[4] = 0;
+
+	return 0;
+}
+
+/*
+ * applesmc_get_key_type - get key type, and put the result in type (char[6]).
+ * Returns zero on success or a negative error on failure. Callers must
+ * hold applesmc_lock.
+ */
+static int applesmc_get_key_type(char* key, char* type)
+{
+	int i;
+
+	outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
+	if (__wait_status(0x0c))
+		return -EIO;
+
+	for (i = 0; i < 4; i++) {
+		outb(key[i], APPLESMC_DATA_PORT);
+		if (__wait_status(0x04))
+			return -EIO;
+	}
+
+	outb(5, APPLESMC_DATA_PORT);
+
+	for (i = 0; i < 6; i++) {
+		if (__wait_status(0x05))
+			return -EIO;
+		type[i] = inb(APPLESMC_DATA_PORT);
+	}
+	type[5] = 0;
+
+	return 0;
+}
+
+/*
+ * applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
+ * hold applesmc_lock.
+ */
+static int applesmc_read_motion_sensor(int index, s16* value)
+{
+	u8 buffer[2];
+	int ret;
+
+	switch (index) {
+	case SENSOR_X:
+		ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
+		break;
+	case SENSOR_Y:
+		ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
+		break;
+	case SENSOR_Z:
+		ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	*value = ((s16)buffer[0] << 8) | buffer[1];
+
+	return ret;
+}
+
+/*
+ * applesmc_device_init - initialize the accelerometer.  Returns zero on success
+ * and negative error code on failure.  Can sleep.
+ */
+static int applesmc_device_init(void)
+{
+	int total, ret = -ENXIO;
+	u8 buffer[2];
+
+	if (!applesmc_accelerometer)
+		return 0;
+
+	mutex_lock(&applesmc_lock);
+
+	for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
+		if (debug)
+			printk(KERN_DEBUG "applesmc try %d\n", total);
+		if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
+				(buffer[0] != 0x00 || buffer[1] != 0x00)) {
+			if (total == INIT_TIMEOUT_MSECS) {
+				printk(KERN_DEBUG "applesmc: device has"
+						" already been initialized"
+						" (0x%02x, 0x%02x).\n",
+						buffer[0], buffer[1]);
+			} else {
+				printk(KERN_DEBUG "applesmc: device"
+						" successfully initialized"
+						" (0x%02x, 0x%02x).\n",
+						buffer[0], buffer[1]);
+			}
+			ret = 0;
+			goto out;
+		}
+		buffer[0] = 0xe0;
+		buffer[1] = 0x00;
+		applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
+		msleep(INIT_WAIT_MSECS);
+	}
+
+	printk(KERN_WARNING "applesmc: failed to init the device\n");
+
+out:
+	mutex_unlock(&applesmc_lock);
+	return ret;
+}
+
+/*
+ * applesmc_get_fan_count - get the number of fans. Callers must NOT hold
+ * applesmc_lock.
+ */
+static int applesmc_get_fan_count(void)
+{
+	int ret;
+	u8 buffer[1];
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(FANS_COUNT, buffer, 1);
+
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return buffer[0];
+}
+
+/* Device model stuff */
+static int applesmc_probe(struct platform_device *dev)
+{
+	int ret;
+
+	ret = applesmc_device_init();
+	if (ret)
+		return ret;
+
+	printk(KERN_INFO "applesmc: device successfully initialized.\n");
+	return 0;
+}
+
+static int applesmc_resume(struct platform_device *dev)
+{
+	return applesmc_device_init();
+}
+
+static struct platform_driver applesmc_driver = {
+	.probe = applesmc_probe,
+	.resume = applesmc_resume,
+	.driver	= {
+		.name = "applesmc",
+		.owner = THIS_MODULE,
+	},
+};
+
+/*
+ * applesmc_calibrate - Set our "resting" values.  Callers must
+ * hold applesmc_lock.
+ */
+static void applesmc_calibrate(void)
+{
+	applesmc_read_motion_sensor(SENSOR_X, &rest_x);
+	applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
+	rest_x = -rest_x;
+}
+
+static int applesmc_idev_open(struct input_dev *dev)
+{
+	add_timer(&applesmc_timer);
+
+	return 0;
+}
+
+static void applesmc_idev_close(struct input_dev *dev)
+{
+	del_timer_sync(&applesmc_timer);
+}
+
+static void applesmc_idev_poll(unsigned long unused)
+{
+	s16 x, y;
+
+	/* Cannot sleep.  Try nonblockingly.  If we fail, try again later. */
+	if (!mutex_trylock(&applesmc_lock)) {
+		mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD);
+		return;
+	}
+
+	if (applesmc_read_motion_sensor(SENSOR_X, &x))
+		goto out;
+	if (applesmc_read_motion_sensor(SENSOR_Y, &y))
+		goto out;
+
+	x = -x;
+	input_report_abs(applesmc_idev, ABS_X, x - rest_x);
+	input_report_abs(applesmc_idev, ABS_Y, y - rest_y);
+	input_sync(applesmc_idev);
+
+out:
+	mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD);
+
+	mutex_unlock(&applesmc_lock);
+}
+
+/* Sysfs Files */
+
+static ssize_t applesmc_position_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	int ret;
+	s16 x, y, z;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_motion_sensor(SENSOR_X, &x);
+	if (ret)
+		goto out;
+	ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
+	if (ret)
+		goto out;
+	ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
+	if (ret)
+		goto out;
+
+out:
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
+}
+
+static ssize_t applesmc_light_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	int ret;
+	u8 left = 0, right = 0;
+	u8 buffer[6];
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
+	left = buffer[2];
+	if (ret)
+		goto out;
+	ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
+	right = buffer[2];
+
+out:
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
+}
+
+/* Displays degree Celsius * 1000 */
+static ssize_t applesmc_show_temperature(struct device *dev,
+			struct device_attribute *devattr, char *sysfsbuf)
+{
+	int ret;
+	u8 buffer[2];
+	unsigned int temp;
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+	const char* key =
+		temperature_sensors_sets[applesmc_temperature_set][attr->index];
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(key, buffer, 2);
+	temp = buffer[0]*1000;
+	temp += (buffer[1] >> 6) * 250;
+
+	mutex_unlock(&applesmc_lock);
+
+	if (ret)
+		return ret;
+	else
+		return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
+}
+
+static ssize_t applesmc_show_fan_speed(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	int ret;
+	unsigned int speed = 0;
+	char newkey[5];
+	u8 buffer[2];
+	struct sensor_device_attribute_2 *sensor_attr =
+						to_sensor_dev_attr_2(attr);
+
+	newkey[0] = fan_speed_keys[sensor_attr->nr][0];
+	newkey[1] = '0' + sensor_attr->index;
+	newkey[2] = fan_speed_keys[sensor_attr->nr][2];
+	newkey[3] = fan_speed_keys[sensor_attr->nr][3];
+	newkey[4] = 0;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(newkey, buffer, 2);
+	speed = ((buffer[0] << 8 | buffer[1]) >> 2);
+
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
+}
+
+static ssize_t applesmc_store_fan_speed(struct device *dev,
+					struct device_attribute *attr,
+					const char *sysfsbuf, size_t count)
+{
+	int ret;
+	u32 speed;
+	char newkey[5];
+	u8 buffer[2];
+	struct sensor_device_attribute_2 *sensor_attr =
+						to_sensor_dev_attr_2(attr);
+
+	speed = simple_strtoul(sysfsbuf, NULL, 10);
+
+	if (speed > 0x4000) /* Bigger than a 14-bit value */
+		return -EINVAL;
+
+	newkey[0] = fan_speed_keys[sensor_attr->nr][0];
+	newkey[1] = '0' + sensor_attr->index;
+	newkey[2] = fan_speed_keys[sensor_attr->nr][2];
+	newkey[3] = fan_speed_keys[sensor_attr->nr][3];
+	newkey[4] = 0;
+
+	mutex_lock(&applesmc_lock);
+
+	buffer[0] = (speed >> 6) & 0xff;
+	buffer[1] = (speed << 2) & 0xff;
+	ret = applesmc_write_key(newkey, buffer, 2);
+
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return count;
+}
+
+static ssize_t applesmc_show_fan_manual(struct device *dev,
+			struct device_attribute *devattr, char *sysfsbuf)
+{
+	int ret;
+	u16 manual = 0;
+	u8 buffer[2];
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
+	manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
+
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
+}
+
+static ssize_t applesmc_store_fan_manual(struct device *dev,
+					 struct device_attribute *devattr,
+					 const char *sysfsbuf, size_t count)
+{
+	int ret;
+	u8 buffer[2];
+	u32 input;
+	u16 val;
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+	input = simple_strtoul(sysfsbuf, NULL, 10);
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
+	val = (buffer[0] << 8 | buffer[1]);
+	if (ret)
+		goto out;
+
+	if (input)
+		val = val | (0x01 << attr->index);
+	else
+		val = val & ~(0x01 << attr->index);
+
+	buffer[0] = (val >> 8) & 0xFF;
+	buffer[1] = val & 0xFF;
+
+	ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
+
+out:
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return count;
+}
+
+static ssize_t applesmc_show_fan_position(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	int ret;
+	char newkey[5];
+	u8 buffer[17];
+	struct sensor_device_attribute_2 *sensor_attr =
+						to_sensor_dev_attr_2(attr);
+
+	newkey[0] = FAN_POSITION[0];
+	newkey[1] = '0' + sensor_attr->index;
+	newkey[2] = FAN_POSITION[2];
+	newkey[3] = FAN_POSITION[3];
+	newkey[4] = 0;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(newkey, buffer, 16);
+	buffer[16] = 0;
+
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
+}
+
+static ssize_t applesmc_calibrate_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
+}
+
+static ssize_t applesmc_calibrate_store(struct device *dev,
+	struct device_attribute *attr, const char *sysfsbuf, size_t count)
+{
+	mutex_lock(&applesmc_lock);
+	applesmc_calibrate();
+	mutex_unlock(&applesmc_lock);
+
+	return count;
+}
+
+/* Store the next backlight value to be written by the work */
+static unsigned int backlight_value;
+
+static void applesmc_backlight_set(struct work_struct *work)
+{
+	u8 buffer[2];
+
+	mutex_lock(&applesmc_lock);
+	buffer[0] = backlight_value;
+	buffer[1] = 0x00;
+	applesmc_write_key(BACKLIGHT_KEY, buffer, 2);
+	mutex_unlock(&applesmc_lock);
+}
+static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
+
+static void applesmc_brightness_set(struct led_classdev *led_cdev,
+						enum led_brightness value)
+{
+	int ret;
+
+	backlight_value = value;
+	ret = queue_work(applesmc_led_wq, &backlight_work);
+
+	if (debug && (!ret))
+		printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
+}
+
+static ssize_t applesmc_key_count_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	int ret;
+	u8 buffer[4];
+	u32 count;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
+	count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
+						((u32)buffer[2]<<8) + buffer[3];
+
+	mutex_unlock(&applesmc_lock);
+	if (ret)
+		return ret;
+	else
+		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
+}
+
+static ssize_t applesmc_key_at_index_read_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	char key[5];
+	char info[6];
+	int ret;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_get_key_at_index(key_at_index, key);
+
+	if (ret || !key[0]) {
+		mutex_unlock(&applesmc_lock);
+
+		return -EINVAL;
+	}
+
+	ret = applesmc_get_key_type(key, info);
+
+	if (ret) {
+		mutex_unlock(&applesmc_lock);
+
+		return ret;
+	}
+
+	/*
+	 * info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
+	 * PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
+	 */
+	ret = applesmc_read_key(key, sysfsbuf, info[0]);
+
+	mutex_unlock(&applesmc_lock);
+
+	if (!ret) {
+		return info[0];
+	}
+	else {
+		return ret;
+	}
+}
+
+static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	char key[5];
+	char info[6];
+	int ret;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_get_key_at_index(key_at_index, key);
+
+	if (ret || !key[0]) {
+		mutex_unlock(&applesmc_lock);
+
+		return -EINVAL;
+	}
+
+	ret = applesmc_get_key_type(key, info);
+
+	mutex_unlock(&applesmc_lock);
+
+	if (!ret)
+		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
+	else
+		return ret;
+}
+
+static ssize_t applesmc_key_at_index_type_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	char key[5];
+	char info[6];
+	int ret;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_get_key_at_index(key_at_index, key);
+
+	if (ret || !key[0]) {
+		mutex_unlock(&applesmc_lock);
+
+		return -EINVAL;
+	}
+
+	ret = applesmc_get_key_type(key, info);
+
+	mutex_unlock(&applesmc_lock);
+
+	if (!ret)
+		return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
+	else
+		return ret;
+}
+
+static ssize_t applesmc_key_at_index_name_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	char key[5];
+	int ret;
+
+	mutex_lock(&applesmc_lock);
+
+	ret = applesmc_get_key_at_index(key_at_index, key);
+
+	mutex_unlock(&applesmc_lock);
+
+	if (!ret && key[0])
+		return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
+	else
+		return -EINVAL;
+}
+
+static ssize_t applesmc_key_at_index_show(struct device *dev,
+				struct device_attribute *attr, char *sysfsbuf)
+{
+	return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
+}
+
+static ssize_t applesmc_key_at_index_store(struct device *dev,
+	struct device_attribute *attr, const char *sysfsbuf, size_t count)
+{
+	mutex_lock(&applesmc_lock);
+
+	key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
+
+	mutex_unlock(&applesmc_lock);
+
+	return count;
+}
+
+static struct led_classdev applesmc_backlight = {
+	.name			= "smc:kbd_backlight",
+	.default_trigger	= "nand-disk",
+	.brightness_set		= applesmc_brightness_set,
+};
+
+static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
+static DEVICE_ATTR(calibrate, 0644,
+			applesmc_calibrate_show, applesmc_calibrate_store);
+
+static struct attribute *accelerometer_attributes[] = {
+	&dev_attr_position.attr,
+	&dev_attr_calibrate.attr,
+	NULL
+};
+
+static const struct attribute_group accelerometer_attributes_group =
+	{ .attrs = accelerometer_attributes };
+
+static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
+
+static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
+static DEVICE_ATTR(key_at_index, 0644,
+		applesmc_key_at_index_show, applesmc_key_at_index_store);
+static DEVICE_ATTR(key_at_index_name, 0444,
+					applesmc_key_at_index_name_show, NULL);
+static DEVICE_ATTR(key_at_index_type, 0444,
+					applesmc_key_at_index_type_show, NULL);
+static DEVICE_ATTR(key_at_index_data_length, 0444,
+				applesmc_key_at_index_data_length_show, NULL);
+static DEVICE_ATTR(key_at_index_data, 0444,
+				applesmc_key_at_index_read_show, NULL);
+
+static struct attribute *key_enumeration_attributes[] = {
+	&dev_attr_key_count.attr,
+	&dev_attr_key_at_index.attr,
+	&dev_attr_key_at_index_name.attr,
+	&dev_attr_key_at_index_type.attr,
+	&dev_attr_key_at_index_data_length.attr,
+	&dev_attr_key_at_index_data.attr,
+	NULL
+};
+
+static const struct attribute_group key_enumeration_group =
+	{ .attrs = key_enumeration_attributes };
+
+/*
+ * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
+ *  - show actual speed
+ *  - show/store minimum speed
+ *  - show maximum speed
+ *  - show safe speed
+ *  - show/store target speed
+ *  - show/store manual mode
+ */
+#define sysfs_fan_speeds_offset(offset) \
+static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
+			applesmc_show_fan_speed, NULL, 0, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
+	applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
+			applesmc_show_fan_speed, NULL, 2, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
+			applesmc_show_fan_speed, NULL, 3, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
+	applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
+\
+static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
+	applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
+\
+static SENSOR_DEVICE_ATTR(fan##offset##_position, S_IRUGO, \
+	applesmc_show_fan_position, NULL, offset-1); \
+\
+static struct attribute *fan##offset##_attributes[] = { \
+	&sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
+	&sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
+	&sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
+	&sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
+	&sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
+	&sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
+	&sensor_dev_attr_fan##offset##_position.dev_attr.attr, \
+	NULL \
+};
+
+/*
+ * Create the needed functions for each fan using the macro defined above
+ * (2 fans are supported)
+ */
+sysfs_fan_speeds_offset(1);
+sysfs_fan_speeds_offset(2);
+
+static const struct attribute_group fan_attribute_groups[] = {
+	{ .attrs = fan1_attributes },
+	{ .attrs = fan2_attributes }
+};
+
+/*
+ * Temperature sensors sysfs entries.
+ */
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 10);
+static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
+					applesmc_show_temperature, NULL, 11);
+
+static struct attribute *temperature_attributes[] = {
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp2_input.dev_attr.attr,
+	&sensor_dev_attr_temp3_input.dev_attr.attr,
+	&sensor_dev_attr_temp4_input.dev_attr.attr,
+	&sensor_dev_attr_temp5_input.dev_attr.attr,
+	&sensor_dev_attr_temp6_input.dev_attr.attr,
+	&sensor_dev_attr_temp7_input.dev_attr.attr,
+	&sensor_dev_attr_temp8_input.dev_attr.attr,
+	&sensor_dev_attr_temp9_input.dev_attr.attr,
+	&sensor_dev_attr_temp10_input.dev_attr.attr,
+	&sensor_dev_attr_temp11_input.dev_attr.attr,
+	&sensor_dev_attr_temp12_input.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group temperature_attributes_group =
+	{ .attrs = temperature_attributes };
+
+/* Module stuff */
+
+/*
+ * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
+ */
+static int applesmc_dmi_match(struct dmi_system_id *id)
+{
+	int i = 0;
+	struct dmi_match_data* dmi_data = id->driver_data;
+	printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
+	applesmc_accelerometer = dmi_data->accelerometer;
+	printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
+				applesmc_accelerometer ? "with" : "without");
+	applesmc_light = dmi_data->light;
+	printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
+					applesmc_light ? "with" : "without");
+
+	applesmc_temperature_set =  dmi_data->temperature_set;
+	while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
+		i++;
+	printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
+	return 1;
+}
+
+/* Create accelerometer ressources */
+static int applesmc_create_accelerometer(void)
+{
+	int ret;
+
+	ret = sysfs_create_group(&pdev->dev.kobj,
+					&accelerometer_attributes_group);
+	if (ret)
+		goto out;
+
+	applesmc_idev = input_allocate_device();
+	if (!applesmc_idev) {
+		ret = -ENOMEM;
+		goto out_sysfs;
+	}
+
+	/* initial calibrate for the input device */
+	applesmc_calibrate();
+
+	/* initialize the input class */
+	applesmc_idev->name = "applesmc";
+	applesmc_idev->id.bustype = BUS_HOST;
+	applesmc_idev->cdev.dev = &pdev->dev;
+	applesmc_idev->evbit[0] = BIT(EV_ABS);
+	applesmc_idev->open = applesmc_idev_open;
+	applesmc_idev->close = applesmc_idev_close;
+	input_set_abs_params(applesmc_idev, ABS_X,
+			-256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
+	input_set_abs_params(applesmc_idev, ABS_Y,
+			-256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
+
+	ret = input_register_device(applesmc_idev);
+	if (ret)
+		goto out_idev;
+
+	/* start up our timer for the input device */
+	init_timer(&applesmc_timer);
+	applesmc_timer.function = applesmc_idev_poll;
+	applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD;
+
+	return 0;
+
+out_idev:
+	input_free_device(applesmc_idev);
+
+out_sysfs:
+	sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
+
+out:
+	printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
+	return ret;
+}
+
+/* Release all ressources used by the accelerometer */
+static void applesmc_release_accelerometer(void)
+{
+	del_timer_sync(&applesmc_timer);
+	input_unregister_device(applesmc_idev);
+	sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
+}
+
+static __initdata struct dmi_match_data applesmc_dmi_data[] = {
+/* MacBook Pro: accelerometer, backlight and temperature set 0 */
+	{ .accelerometer = 1, .light = 1, .temperature_set = 0 },
+/* MacBook: accelerometer and temperature set 0 */
+	{ .accelerometer = 1, .light = 0, .temperature_set = 0 },
+/* MacBook: temperature set 1 */
+	{ .accelerometer = 0, .light = 0, .temperature_set = 1 }
+};
+
+/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
+ * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
+static __initdata struct dmi_system_id applesmc_whitelist[] = {
+	{ applesmc_dmi_match, "Apple MacBook Pro", {
+	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
+	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
+		(void*)&applesmc_dmi_data[0]},
+	{ applesmc_dmi_match, "Apple MacBook", {
+	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
+	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
+		(void*)&applesmc_dmi_data[1]},
+	{ applesmc_dmi_match, "Apple Macmini", {
+	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
+	  DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
+		(void*)&applesmc_dmi_data[2]},
+	{ .ident = NULL }
+};
+
+static int __init applesmc_init(void)
+{
+	int ret;
+	int count;
+	int i;
+
+	mutex_init(&applesmc_lock);
+
+	if (!dmi_check_system(applesmc_whitelist)) {
+		printk(KERN_WARNING "applesmc: supported laptop not found!\n");
+		ret = -ENODEV;
+		goto out;
+	}
+
+	if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
+								"applesmc")) {
+		ret = -ENXIO;
+		goto out;
+	}
+
+	ret = platform_driver_register(&applesmc_driver);
+	if (ret)
+		goto out_region;
+
+	pdev = platform_device_register_simple("applesmc", -1, NULL, 0);
+	if (IS_ERR(pdev)) {
+		ret = PTR_ERR(pdev);
+		goto out_driver;
+	}
+
+	/* Create key enumeration sysfs files */
+	ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
+	if (ret)
+		goto out_device;
+
+	/* create fan files */
+	count = applesmc_get_fan_count();
+	if (count < 0) {
+		printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
+	} else {
+		printk(KERN_INFO "applesmc: %d fans found.\n", count);
+
+		switch (count) {
+		default:
+			printk(KERN_WARNING "applesmc: More than 2 fans found,"
+					" but at most 2 fans are supported"
+						" by the driver.\n");
+		case 2:
+			ret = sysfs_create_group(&pdev->dev.kobj,
+						 &fan_attribute_groups[1]);
+			if (ret)
+				goto out_key_enumeration;
+		case 1:
+			ret = sysfs_create_group(&pdev->dev.kobj,
+						 &fan_attribute_groups[0]);
+			if (ret)
+				goto out_fan_1;
+		case 0:
+			;
+		}
+	}
+
+	for (i = 0;
+	     temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
+	     i++) {
+		if (temperature_attributes[i] == NULL) {
+			printk(KERN_ERR "applesmc: More temperature sensors "
+				"in temperature_sensors_sets (at least %i)"
+				"than available sysfs files in "
+				"temperature_attributes (%i), please report "
+				"this bug.\n", i, i-1);
+			goto out_temperature;
+		}
+		ret = sysfs_create_file(&pdev->dev.kobj,
+						temperature_attributes[i]);
+		if (ret)
+			goto out_temperature;
+	}
+
+	if (applesmc_accelerometer) {
+		ret = applesmc_create_accelerometer();
+		if (ret)
+			goto out_temperature;
+	}
+
+	if (applesmc_light) {
+		/* Add light sensor file */
+		ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
+		if (ret)
+			goto out_accelerometer;
+
+		/* Create the workqueue */
+		applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
+		if (!applesmc_led_wq) {
+			ret = -ENOMEM;
+			goto out_light_sysfs;
+		}
+
+		/* register as a led device */
+		ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
+		if (ret < 0)
+			goto out_light_wq;
+	}
+
+	hwmon_class_dev = hwmon_device_register(&pdev->dev);
+	if (IS_ERR(hwmon_class_dev)) {
+		ret = PTR_ERR(hwmon_class_dev);
+		goto out_light_ledclass;
+	}
+
+	printk(KERN_INFO "applesmc: driver successfully loaded.\n");
+
+	return 0;
+
+out_light_ledclass:
+	if (applesmc_light)
+		led_classdev_unregister(&applesmc_backlight);
+out_light_wq:
+	if (applesmc_light)
+		destroy_workqueue(applesmc_led_wq);
+out_light_sysfs:
+	if (applesmc_light)
+		sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
+out_accelerometer:
+	if (applesmc_accelerometer)
+		applesmc_release_accelerometer();
+out_temperature:
+	sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
+	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
+out_fan_1:
+	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
+out_key_enumeration:
+	sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
+out_device:
+	platform_device_unregister(pdev);
+out_driver:
+	platform_driver_unregister(&applesmc_driver);
+out_region:
+	release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
+out:
+	printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
+	return ret;
+}
+
+static void __exit applesmc_exit(void)
+{
+	hwmon_device_unregister(hwmon_class_dev);
+	if (applesmc_light) {
+		led_classdev_unregister(&applesmc_backlight);
+		destroy_workqueue(applesmc_led_wq);
+		sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
+	}
+	if (applesmc_accelerometer)
+		applesmc_release_accelerometer();
+	sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
+	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
+	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
+	sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
+	platform_device_unregister(pdev);
+	platform_driver_unregister(&applesmc_driver);
+	release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
+
+	printk(KERN_INFO "applesmc: driver unloaded.\n");
+}
+
+module_init(applesmc_init);
+module_exit(applesmc_exit);
+
+MODULE_AUTHOR("Nicolas Boichat");
+MODULE_DESCRIPTION("Apple SMC");
+MODULE_LICENSE("GPL v2");