1 files changed, 859 insertions, 653 deletions

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 4226e5352738..0306174ba875 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -1,5 +1,5 @@
 /*
- *  eepc-laptop.c - Asus Eee PC extras
+ *  eeepc-laptop.c - Asus Eee PC extras
  *
  *  Based on asus_acpi.c as patched for the Eee PC by Asus:
  *  ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
@@ -27,27 +27,41 @@
 #include <linux/fb.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
+#include <linux/slab.h>
 #include <acpi/acpi_drivers.h>
 #include <acpi/acpi_bus.h>
 #include <linux/uaccess.h>
 #include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
 #include <linux/rfkill.h>
 #include <linux/pci.h>
 #include <linux/pci_hotplug.h>
+#include <linux/leds.h>
+#include <linux/dmi.h>
 
 #define EEEPC_LAPTOP_VERSION    "0.1"
+#define EEEPC_LAPTOP_NAME       "Eee PC Hotkey Driver"
+#define EEEPC_LAPTOP_FILE       "eeepc"
 
-#define EEEPC_HOTK_NAME         "Eee PC Hotkey Driver"
-#define EEEPC_HOTK_FILE         "eeepc"
-#define EEEPC_HOTK_CLASS        "hotkey"
-#define EEEPC_HOTK_DEVICE_NAME  "Hotkey"
-#define EEEPC_HOTK_HID          "ASUS010"
+#define EEEPC_ACPI_CLASS        "hotkey"
+#define EEEPC_ACPI_DEVICE_NAME  "Hotkey"
+#define EEEPC_ACPI_HID          "ASUS010"
 
+MODULE_AUTHOR("Corentin Chary, Eric Cooper");
+MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
+MODULE_LICENSE("GPL");
+
+static bool hotplug_disabled;
+
+module_param(hotplug_disabled, bool, 0644);
+MODULE_PARM_DESC(hotplug_disabled,
+                 "Disable hotplug for wireless device. "
+                 "If your laptop need that, please report to "
+                 "acpi4asus-user@lists.sourceforge.net.");
 
 /*
  * Definitions for Asus EeePC
  */
-#define NOTIFY_WLAN_ON  0x10
 #define NOTIFY_BRN_MIN  0x20
 #define NOTIFY_BRN_MAX  0x2f
 
@@ -117,145 +131,63 @@ static const char *cm_setv[] = {
         NULL, NULL, "PBPS", "TPDS"
 };
 
-#define EEEPC_EC        "\\_SB.PCI0.SBRG.EC0."
-
-#define EEEPC_EC_FAN_PWM        EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */
-#define EEEPC_EC_SC02           0x63
-#define EEEPC_EC_FAN_HRPM       EEEPC_EC "SC05" /* High byte, fan speed (RPM) */
-#define EEEPC_EC_FAN_LRPM       EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */
-#define EEEPC_EC_FAN_CTRL       EEEPC_EC "SFB3" /* Byte containing SF25  */
-#define EEEPC_EC_SFB3           0xD3
+static const struct key_entry eeepc_keymap[] = {
+        { KE_KEY, 0x10, { KEY_WLAN } },
+        { KE_KEY, 0x11, { KEY_WLAN } },
+        { KE_KEY, 0x12, { KEY_PROG1 } },
+        { KE_KEY, 0x13, { KEY_MUTE } },
+        { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
+        { KE_KEY, 0x15, { KEY_VOLUMEUP } },
+        { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
+        { KE_KEY, 0x1a, { KEY_COFFEE } },
+        { KE_KEY, 0x1b, { KEY_ZOOM } },
+        { KE_KEY, 0x1c, { KEY_PROG2 } },
+        { KE_KEY, 0x1d, { KEY_PROG3 } },
+        { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
+        { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
+        { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
+        { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
+        { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
+        { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
+        { KE_KEY, 0x38, { KEY_F14 } },
+        { KE_END, 0 },
+};
 
 /*
  * This is the main structure, we can use it to store useful information
- * about the hotk device
  */
-struct eeepc_hotk {
-        struct acpi_device *device;     /* the device we are in */
-        acpi_handle handle;             /* the handle of the hotk device */
+struct eeepc_laptop {
+        acpi_handle handle;             /* the handle of the acpi device */
         u32 cm_supported;               /* the control methods supported
                                            by this BIOS */
-        uint init_flag;                 /* Init flags */
+        bool cpufv_disabled;
+        bool hotplug_disabled;
         u16 event_count[128];           /* count for each event */
+
+        struct platform_device *platform_device;
+        struct device *hwmon_device;
+        struct backlight_device *backlight_device;
+
         struct input_dev *inputdev;
-        u16 *keycode_map;
+
         struct rfkill *wlan_rfkill;
         struct rfkill *bluetooth_rfkill;
         struct rfkill *wwan3g_rfkill;
         struct rfkill *wimax_rfkill;
+
         struct hotplug_slot *hotplug_slot;
         struct mutex hotplug_lock;
-};
-
-/* The actual device the driver binds to */
-static struct eeepc_hotk *ehotk;
-
-/* Platform device/driver */
-static int eeepc_hotk_thaw(struct device *device);
-static int eeepc_hotk_restore(struct device *device);
-
-static struct dev_pm_ops eeepc_pm_ops = {
-        .thaw = eeepc_hotk_thaw,
-        .restore = eeepc_hotk_restore,
-};
-
-static struct platform_driver platform_driver = {
-        .driver = {
-                .name = EEEPC_HOTK_FILE,
-                .owner = THIS_MODULE,
-                .pm = &eeepc_pm_ops,
-        }
-};
-
-static struct platform_device *platform_device;
-
-struct key_entry {
-        char type;
-        u8 code;
-        u16 keycode;
-};
-
-enum { KE_KEY, KE_END };
-
-static struct key_entry eeepc_keymap[] = {
-        /* Sleep already handled via generic ACPI code */
-        {KE_KEY, 0x10, KEY_WLAN },
-        {KE_KEY, 0x11, KEY_WLAN },
-        {KE_KEY, 0x12, KEY_PROG1 },
-        {KE_KEY, 0x13, KEY_MUTE },
-        {KE_KEY, 0x14, KEY_VOLUMEDOWN },
-        {KE_KEY, 0x15, KEY_VOLUMEUP },
-        {KE_KEY, 0x1a, KEY_COFFEE },
-        {KE_KEY, 0x1b, KEY_ZOOM },
-        {KE_KEY, 0x1c, KEY_PROG2 },
-        {KE_KEY, 0x1d, KEY_PROG3 },
-        {KE_KEY, NOTIFY_BRN_MIN,     KEY_BRIGHTNESSDOWN },
-        {KE_KEY, NOTIFY_BRN_MIN + 2, KEY_BRIGHTNESSUP },
-        {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
-        {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
-        {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
-        {KE_END, 0},
-};
-
-/*
- * The hotkey driver declaration
- */
-static int eeepc_hotk_add(struct acpi_device *device);
-static int eeepc_hotk_remove(struct acpi_device *device, int type);
-static void eeepc_hotk_notify(struct acpi_device *device, u32 event);
-
-static const struct acpi_device_id eeepc_device_ids[] = {
-        {EEEPC_HOTK_HID, 0},
-        {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
-
-static struct acpi_driver eeepc_hotk_driver = {
-        .name = EEEPC_HOTK_NAME,
-        .class = EEEPC_HOTK_CLASS,
-        .ids = eeepc_device_ids,
-        .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
-        .ops = {
-                .add = eeepc_hotk_add,
-                .remove = eeepc_hotk_remove,
-                .notify = eeepc_hotk_notify,
-        },
-};
-
-/* PCI hotplug ops */
-static int eeepc_get_adapter_status(struct hotplug_slot *slot, u8 *value);
 
-static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
-        .owner = THIS_MODULE,
-        .get_adapter_status = eeepc_get_adapter_status,
-        .get_power_status = eeepc_get_adapter_status,
+        struct led_classdev tpd_led;
+        int tpd_led_wk;
+        struct workqueue_struct *led_workqueue;
+        struct work_struct tpd_led_work;
 };
 
-/* The backlight device /sys/class/backlight */
-static struct backlight_device *eeepc_backlight_device;
-
-/* The hwmon device */
-static struct device *eeepc_hwmon_device;
-
-/*
- * The backlight class declaration
- */
-static int read_brightness(struct backlight_device *bd);
-static int update_bl_status(struct backlight_device *bd);
-static struct backlight_ops eeepcbl_ops = {
-        .get_brightness = read_brightness,
-        .update_status = update_bl_status,
-};
-
-MODULE_AUTHOR("Corentin Chary, Eric Cooper");
-MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
-MODULE_LICENSE("GPL");
-
 /*
  * ACPI Helpers
  */
-static int write_acpi_int(acpi_handle handle, const char *method, int val,
-                          struct acpi_buffer *output)
+static int write_acpi_int(acpi_handle handle, const char *method, int val)
 {
         struct acpi_object_list params;
         union acpi_object in_obj;
@@ -266,7 +198,7 @@ static int write_acpi_int(acpi_handle handle, const char *method, int val,
         in_obj.type = ACPI_TYPE_INTEGER;
         in_obj.integer.value = val;
 
-        status = acpi_evaluate_object(handle, (char *)method, &params, output);
+        status = acpi_evaluate_object(handle, (char *)method, &params, NULL);
         return (status == AE_OK ? 0 : -1);
 }
 
@@ -285,81 +217,56 @@ static int read_acpi_int(acpi_handle handle, const char *method, int *val)
         }
 }
 
-static int set_acpi(int cm, int value)
+static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
 {
-        if (ehotk->cm_supported & (0x1 << cm)) {
-                const char *method = cm_setv[cm];
-                if (method == NULL)
-                        return -ENODEV;
-                if (write_acpi_int(ehotk->handle, method, value, NULL))
-                        pr_warning("Error writing %s\n", method);
-        }
-        return 0;
-}
-
-static int get_acpi(int cm)
-{
-        int value = -ENODEV;
-        if ((ehotk->cm_supported & (0x1 << cm))) {
-                const char *method = cm_getv[cm];
-                if (method == NULL)
-                        return -ENODEV;
-                if (read_acpi_int(ehotk->handle, method, &value))
-                        pr_warning("Error reading %s\n", method);
-        }
-        return value;
-}
+        const char *method = cm_setv[cm];
 
-/*
- * Backlight
- */
-static int read_brightness(struct backlight_device *bd)
-{
-        return get_acpi(CM_ASL_PANELBRIGHT);
-}
+        if (method == NULL)
+                return -ENODEV;
+        if ((eeepc->cm_supported & (0x1 << cm)) == 0)
+                return -ENODEV;
 
-static int set_brightness(struct backlight_device *bd, int value)
-{
-        value = max(0, min(15, value));
-        return set_acpi(CM_ASL_PANELBRIGHT, value);
+        if (write_acpi_int(eeepc->handle, method, value))
+                pr_warning("Error writing %s\n", method);
+        return 0;
 }
 
-static int update_bl_status(struct backlight_device *bd)
+static int get_acpi(struct eeepc_laptop *eeepc, int cm)
 {
-        return set_brightness(bd, bd->props.brightness);
-}
+        const char *method = cm_getv[cm];
+        int value;
 
-/*
- * Rfkill helpers
- */
+        if (method == NULL)
+                return -ENODEV;
+        if ((eeepc->cm_supported & (0x1 << cm)) == 0)
+                return -ENODEV;
 
-static bool eeepc_wlan_rfkill_blocked(void)
-{
-        if (get_acpi(CM_ASL_WLAN) == 1)
-                return false;
-        return true;
+        if (read_acpi_int(eeepc->handle, method, &value))
+                pr_warning("Error reading %s\n", method);
+        return value;
 }
 
-static int eeepc_rfkill_set(void *data, bool blocked)
+static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
+                              acpi_handle *handle)
 {
-        unsigned long asl = (unsigned long)data;
-        return set_acpi(asl, !blocked);
-}
+        const char *method = cm_setv[cm];
+        acpi_status status;
 
-static const struct rfkill_ops eeepc_rfkill_ops = {
-        .set_block = eeepc_rfkill_set,
-};
+        if (method == NULL)
+                return -ENODEV;
+        if ((eeepc->cm_supported & (0x1 << cm)) == 0)
+                return -ENODEV;
 
-static void __devinit eeepc_enable_camera(void)
-{
-        /*
-         * If the following call to set_acpi() fails, it's because there's no
-         * camera so we can ignore the error.
-         */
-        if (get_acpi(CM_ASL_CAMERA) == 0)
-                set_acpi(CM_ASL_CAMERA, 1);
+        status = acpi_get_handle(eeepc->handle, (char *)method,
+                                 handle);
+        if (status != AE_OK) {
+                pr_warning("Error finding %s\n", method);
+                return -ENODEV;
+        }
+        return 0;
 }
 
+
 /*
  * Sys helpers
  */
@@ -372,60 +279,63 @@ static int parse_arg(const char *buf, unsigned long count, int *val)
         return count;
 }
 
-static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
+static ssize_t store_sys_acpi(struct device *dev, int cm,
+                              const char *buf, size_t count)
 {
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
         int rv, value;
 
         rv = parse_arg(buf, count, &value);
         if (rv > 0)
-                value = set_acpi(cm, value);
+                value = set_acpi(eeepc, cm, value);
         if (value < 0)
-                return value;
+                return -EIO;
         return rv;
 }
 
-static ssize_t show_sys_acpi(int cm, char *buf)
+static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
 {
-        int value = get_acpi(cm);
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+        int value = get_acpi(eeepc, cm);
 
         if (value < 0)
-                return value;
+                return -EIO;
         return sprintf(buf, "%d\n", value);
 }
 
-#define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
+#define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm)                     \
         static ssize_t show_##_name(struct device *dev,                 \
                                     struct device_attribute *attr,      \
                                     char *buf)                          \
         {                                                               \
-                return show_sys_acpi(_cm, buf);                         \
+                return show_sys_acpi(dev, _cm, buf);                    \
         }                                                               \
         static ssize_t store_##_name(struct device *dev,                \
                                      struct device_attribute *attr,     \
                                      const char *buf, size_t count)     \
         {                                                               \
-                return store_sys_acpi(_cm, buf, count);                 \
+                return store_sys_acpi(dev, _cm, buf, count);            \
         }                                                               \
         static struct device_attribute dev_attr_##_name = {             \
                 .attr = {                                               \
                         .name = __stringify(_name),                     \
-                        .mode = 0644 },                                 \
+                        .mode = _mode },                                \
                 .show   = show_##_name,                                 \
                 .store  = store_##_name,                                \
         }
 
-EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
-EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
-EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
+EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
+EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
+EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
 
 struct eeepc_cpufv {
         int num;
         int cur;
 };
 
-static int get_cpufv(struct eeepc_cpufv *c)
+static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
 {
-        c->cur = get_acpi(CM_ASL_CPUFV);
+        c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
         c->num = (c->cur >> 8) & 0xff;
         c->cur &= 0xff;
         if (c->cur < 0 || c->num <= 0 || c->num > 12)
@@ -437,11 +347,12 @@ static ssize_t show_available_cpufv(struct device *dev,
                                     struct device_attribute *attr,
                                     char *buf)
 {
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
         struct eeepc_cpufv c;
         int i;
         ssize_t len = 0;
 
-        if (get_cpufv(&c))
+        if (get_cpufv(eeepc, &c))
                 return -ENODEV;
         for (i = 0; i < c.num; i++)
                 len += sprintf(buf + len, "%d ", i);
@@ -453,9 +364,10 @@ static ssize_t show_cpufv(struct device *dev,
                           struct device_attribute *attr,
                           char *buf)
 {
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
         struct eeepc_cpufv c;
 
-        if (get_cpufv(&c))
+        if (get_cpufv(eeepc, &c))
                 return -ENODEV;
         return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
 }
@@ -464,20 +376,58 @@ static ssize_t store_cpufv(struct device *dev,
                            struct device_attribute *attr,
                            const char *buf, size_t count)
 {
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
         struct eeepc_cpufv c;
         int rv, value;
 
-        if (get_cpufv(&c))
+        if (eeepc->cpufv_disabled)
+                return -EPERM;
+        if (get_cpufv(eeepc, &c))
                 return -ENODEV;
         rv = parse_arg(buf, count, &value);
         if (rv < 0)
                 return rv;
         if (!rv || value < 0 || value >= c.num)
                 return -EINVAL;
-        set_acpi(CM_ASL_CPUFV, value);
+        set_acpi(eeepc, CM_ASL_CPUFV, value);
         return rv;
 }
 
+static ssize_t show_cpufv_disabled(struct device *dev,
+                          struct device_attribute *attr,
+                          char *buf)
+{
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+
+        return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
+}
+
+static ssize_t store_cpufv_disabled(struct device *dev,
+                           struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+        struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+        int rv, value;
+
+        rv = parse_arg(buf, count, &value);
+        if (rv < 0)
+                return rv;
+
+        switch (value) {
+        case 0:
+                if (eeepc->cpufv_disabled)
+                        pr_warning("cpufv enabled (not officially supported "
+                                "on this model)\n");
+                eeepc->cpufv_disabled = false;
+                return rv;
+        case 1:
+                return -EPERM;
+        default:
+                return -EINVAL;
+        }
+}
+
+
 static struct device_attribute dev_attr_cpufv = {
         .attr = {
                 .name = "cpufv",
@@ -493,12 +443,22 @@ static struct device_attribute dev_attr_available_cpufv = {
         .show   = show_available_cpufv
 };
 
+static struct device_attribute dev_attr_cpufv_disabled = {
+        .attr = {
+                .name = "cpufv_disabled",
+                .mode = 0644 },
+        .show   = show_cpufv_disabled,
+        .store  = store_cpufv_disabled
+};
+
+
 static struct attribute *platform_attributes[] = {
         &dev_attr_camera.attr,
         &dev_attr_cardr.attr,
         &dev_attr_disp.attr,
         &dev_attr_cpufv.attr,
         &dev_attr_available_cpufv.attr,
+        &dev_attr_cpufv_disabled.attr,
         NULL
 };
 
@@ -506,162 +466,149 @@ static struct attribute_group platform_attribute_group = {
         .attrs = platform_attributes
 };
 
-/*
- * Hotkey functions
- */
-static struct key_entry *eepc_get_entry_by_scancode(int code)
+static int eeepc_platform_init(struct eeepc_laptop *eeepc)
 {
-        struct key_entry *key;
-
-        for (key = eeepc_keymap; key->type != KE_END; key++)
-                if (code == key->code)
-                        return key;
+        int result;
 
-        return NULL;
-}
+        eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
+        if (!eeepc->platform_device)
+                return -ENOMEM;
+        platform_set_drvdata(eeepc->platform_device, eeepc);
 
-static struct key_entry *eepc_get_entry_by_keycode(int code)
-{
-        struct key_entry *key;
+        result = platform_device_add(eeepc->platform_device);
+        if (result)
+                goto fail_platform_device;
 
-        for (key = eeepc_keymap; key->type != KE_END; key++)
-                if (code == key->keycode && key->type == KE_KEY)
-                        return key;
+        result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
+                                    &platform_attribute_group);
+        if (result)
+                goto fail_sysfs;
+        return 0;
 
-        return NULL;
+fail_sysfs:
+        platform_device_del(eeepc->platform_device);
+fail_platform_device:
+        platform_device_put(eeepc->platform_device);
+        return result;
 }
 
-static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
+static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
 {
-        struct key_entry *key = eepc_get_entry_by_scancode(scancode);
+        sysfs_remove_group(&eeepc->platform_device->dev.kobj,
+                           &platform_attribute_group);
+        platform_device_unregister(eeepc->platform_device);
+}
 
-        if (key && key->type == KE_KEY) {
-                *keycode = key->keycode;
-                return 0;
-        }
+/*
+ * LEDs
+ */
+/*
+ * These functions actually update the LED's, and are called from a
+ * workqueue. By doing this as separate work rather than when the LED
+ * subsystem asks, we avoid messing with the Asus ACPI stuff during a
+ * potentially bad time, such as a timer interrupt.
+ */
+static void tpd_led_update(struct work_struct *work)
+ {
+        struct eeepc_laptop *eeepc;
+
+        eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
 
-        return -EINVAL;
+        set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
 }
 
-static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
+static void tpd_led_set(struct led_classdev *led_cdev,
+                        enum led_brightness value)
 {
-        struct key_entry *key;
-        int old_keycode;
+        struct eeepc_laptop *eeepc;
 
-        if (keycode < 0 || keycode > KEY_MAX)
-                return -EINVAL;
+        eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
 
-        key = eepc_get_entry_by_scancode(scancode);
-        if (key && key->type == KE_KEY) {
-                old_keycode = key->keycode;
-                key->keycode = keycode;
-                set_bit(keycode, dev->keybit);
-                if (!eepc_get_entry_by_keycode(old_keycode))
-                        clear_bit(old_keycode, dev->keybit);
-                return 0;
-        }
-
-        return -EINVAL;
+        eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
+        queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 }
 
-static void cmsg_quirk(int cm, const char *name)
+static int eeepc_led_init(struct eeepc_laptop *eeepc)
 {
-        int dummy;
+        int rv;
 
-        /* Some BIOSes do not report cm although it is avaliable.
-           Check if cm_getv[cm] works and, if yes, assume cm should be set. */
-        if (!(ehotk->cm_supported & (1 << cm))
-            && !read_acpi_int(ehotk->handle, cm_getv[cm], &dummy)) {
-                pr_info("%s (%x) not reported by BIOS,"
-                        " enabling anyway\n", name, 1 << cm);
-                ehotk->cm_supported |= 1 << cm;
-        }
-}
+        if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
+                return 0;
 
-static void cmsg_quirks(void)
-{
-        cmsg_quirk(CM_ASL_LID, "LID");
-        cmsg_quirk(CM_ASL_TYPE, "TYPE");
-        cmsg_quirk(CM_ASL_PANELPOWER, "PANELPOWER");
-        cmsg_quirk(CM_ASL_TPD, "TPD");
-}
+        eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
+        if (!eeepc->led_workqueue)
+                return -ENOMEM;
+        INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
 
-static int eeepc_hotk_check(void)
-{
-        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-        int result;
+        eeepc->tpd_led.name = "eeepc::touchpad";
+        eeepc->tpd_led.brightness_set = tpd_led_set;
+        eeepc->tpd_led.max_brightness = 1;
 
-        result = acpi_bus_get_status(ehotk->device);
-        if (result)
-                return result;
-        if (ehotk->device->status.present) {
-                if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
-                                    &buffer)) {
-                        pr_err("Hotkey initialization failed\n");
-                        return -ENODEV;
-                } else {
-                        pr_notice("Hotkey init flags 0x%x\n", ehotk->init_flag);
-                }
-                /* get control methods supported */
-                if (read_acpi_int(ehotk->handle, "CMSG"
-                                   , &ehotk->cm_supported)) {
-                        pr_err("Get control methods supported failed\n");
-                        return -ENODEV;
-                } else {
-                        cmsg_quirks();
-                        pr_info("Get control methods supported: 0x%x\n",
-                                ehotk->cm_supported);
-                }
-        } else {
-                pr_err("Hotkey device not present, aborting\n");
-                return -EINVAL;
+        rv = led_classdev_register(&eeepc->platform_device->dev,
+                                   &eeepc->tpd_led);
+        if (rv) {
+                destroy_workqueue(eeepc->led_workqueue);
+                return rv;
         }
+
         return 0;
 }
 
-static int notify_brn(void)
+static void eeepc_led_exit(struct eeepc_laptop *eeepc)
 {
-        /* returns the *previous* brightness, or -1 */
-        struct backlight_device *bd = eeepc_backlight_device;
-        if (bd) {
-                int old = bd->props.brightness;
-                backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
-                return old;
-        }
-        return -1;
+        if (eeepc->tpd_led.dev)
+                led_classdev_unregister(&eeepc->tpd_led);
+        if (eeepc->led_workqueue)
+                destroy_workqueue(eeepc->led_workqueue);
 }
 
-static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
-                                    u8 *value)
-{
-        int val = get_acpi(CM_ASL_WLAN);
-
-        if (val == 1 || val == 0)
-                *value = val;
-        else
-                return -EINVAL;
 
-        return 0;
+/*
+ * PCI hotplug (for wlan rfkill)
+ */
+static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
+{
+        if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
+                return false;
+        return true;
 }
 
-static void eeepc_rfkill_hotplug(void)
+static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc)
 {
         struct pci_dev *dev;
         struct pci_bus *bus;
-        bool blocked = eeepc_wlan_rfkill_blocked();
+        bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
+        bool absent;
+        u32 l;
 
-        if (ehotk->wlan_rfkill)
-                rfkill_set_sw_state(ehotk->wlan_rfkill, blocked);
+        if (eeepc->wlan_rfkill)
+                rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
 
-        mutex_lock(&ehotk->hotplug_lock);
+        mutex_lock(&eeepc->hotplug_lock);
 
-        if (ehotk->hotplug_slot) {
+        if (eeepc->hotplug_slot) {
                 bus = pci_find_bus(0, 1);
                 if (!bus) {
                         pr_warning("Unable to find PCI bus 1?\n");
                         goto out_unlock;
                 }
 
+                if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
+                        pr_err("Unable to read PCI config space?\n");
+                        goto out_unlock;
+                }
+                absent = (l == 0xffffffff);
+
+                if (blocked != absent) {
+                        pr_warning("BIOS says wireless lan is %s, "
+                                        "but the pci device is %s\n",
+                                blocked ? "blocked" : "unblocked",
+                                absent ? "absent" : "present");
+                        pr_warning("skipped wireless hotplug as probably "
+                                        "inappropriate for this model\n");
+                        goto out_unlock;
+                }
+
                 if (!blocked) {
                         dev = pci_get_slot(bus, 0);
                         if (dev) {
@@ -685,69 +632,23 @@ static void eeepc_rfkill_hotplug(void)
         }
 
 out_unlock:
-        mutex_unlock(&ehotk->hotplug_lock);
+        mutex_unlock(&eeepc->hotplug_lock);
 }
 
 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 {
+        struct eeepc_laptop *eeepc = data;
+
         if (event != ACPI_NOTIFY_BUS_CHECK)
                 return;
 
-        eeepc_rfkill_hotplug();
-}
-
-static void eeepc_hotk_notify(struct acpi_device *device, u32 event)
-{
-        static struct key_entry *key;
-        u16 count;
-        int brn = -ENODEV;
-
-        if (!ehotk)
-                return;
-        if (event > ACPI_MAX_SYS_NOTIFY)
-                return;
-        if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
-                brn = notify_brn();
-        count = ehotk->event_count[event % 128]++;
-        acpi_bus_generate_proc_event(ehotk->device, event, count);
-        acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
-                                        dev_name(&ehotk->device->dev), event,
-                                        count);
-        if (ehotk->inputdev) {
-                if (brn != -ENODEV) {
-                        /* brightness-change events need special
-                         * handling for conversion to key events
-                         */
-                        if (brn < 0)
-                                brn = event;
-                        else
-                                brn += NOTIFY_BRN_MIN;
-                        if (event < brn)
-                                event = NOTIFY_BRN_MIN; /* brightness down */
-                        else if (event > brn)
-                                event = NOTIFY_BRN_MIN + 2; /* ... up */
-                        else
-                                event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
-                }
-                key = eepc_get_entry_by_scancode(event);
-                if (key) {
-                        switch (key->type) {
-                        case KE_KEY:
-                                input_report_key(ehotk->inputdev, key->keycode,
-                                                 1);
-                                input_sync(ehotk->inputdev);
-                                input_report_key(ehotk->inputdev, key->keycode,
-                                                 0);
-                                input_sync(ehotk->inputdev);
-                                break;
-                        }
-                }
-        }
+        eeepc_rfkill_hotplug(eeepc);
 }
 
-static int eeepc_register_rfkill_notifier(char *node)
+static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
+                                          char *node)
 {
-        acpi_status status = AE_OK;
+        acpi_status status;
         acpi_handle handle;
 
         status = acpi_get_handle(NULL, node, &handle);
@@ -756,7 +657,7 @@ static int eeepc_register_rfkill_notifier(char *node)
                 status = acpi_install_notify_handler(handle,
                                                      ACPI_SYSTEM_NOTIFY,
                                                      eeepc_rfkill_notify,
-                                                     NULL);
+                                                     eeepc);
                 if (ACPI_FAILURE(status))
                         pr_warning("Failed to register notify on %s\n", node);
         } else
@@ -765,7 +666,8 @@ static int eeepc_register_rfkill_notifier(char *node)
         return 0;
 }
 
-static void eeepc_unregister_rfkill_notifier(char *node)
+static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
+                                             char *node)
 {
         acpi_status status = AE_OK;
         acpi_handle handle;
@@ -782,13 +684,33 @@ static void eeepc_unregister_rfkill_notifier(char *node)
         }
 }
 
+static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
+                                    u8 *value)
+{
+        struct eeepc_laptop *eeepc = hotplug_slot->private;
+        int val = get_acpi(eeepc, CM_ASL_WLAN);
+
+        if (val == 1 || val == 0)
+                *value = val;
+        else
+                return -EINVAL;
+
+        return 0;
+}
+
 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 {
         kfree(hotplug_slot->info);
         kfree(hotplug_slot);
 }
 
-static int eeepc_setup_pci_hotplug(void)
+static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
+        .owner = THIS_MODULE,
+        .get_adapter_status = eeepc_get_adapter_status,
+        .get_power_status = eeepc_get_adapter_status,
+};
+
+static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
 {
         int ret = -ENOMEM;
         struct pci_bus *bus = pci_find_bus(0, 1);
@@ -798,22 +720,22 @@ static int eeepc_setup_pci_hotplug(void)
                 return -ENODEV;
         }
 
-        ehotk->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
-        if (!ehotk->hotplug_slot)
+        eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
+        if (!eeepc->hotplug_slot)
                 goto error_slot;
 
-        ehotk->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
+        eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
                                             GFP_KERNEL);
-        if (!ehotk->hotplug_slot->info)
+        if (!eeepc->hotplug_slot->info)
                 goto error_info;
 
-        ehotk->hotplug_slot->private = ehotk;
-        ehotk->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
-        ehotk->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
-        eeepc_get_adapter_status(ehotk->hotplug_slot,
-                                 &ehotk->hotplug_slot->info->adapter_status);
+        eeepc->hotplug_slot->private = eeepc;
+        eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
+        eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
+        eeepc_get_adapter_status(eeepc->hotplug_slot,
+                                 &eeepc->hotplug_slot->info->adapter_status);
 
-        ret = pci_hp_register(ehotk->hotplug_slot, bus, 0, "eeepc-wifi");
+        ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
         if (ret) {
                 pr_err("Unable to register hotplug slot - %d\n", ret);
                 goto error_register;
@@ -822,17 +744,159 @@ static int eeepc_setup_pci_hotplug(void)
         return 0;
 
 error_register:
-        kfree(ehotk->hotplug_slot->info);
+        kfree(eeepc->hotplug_slot->info);
 error_info:
-        kfree(ehotk->hotplug_slot);
-        ehotk->hotplug_slot = NULL;
+        kfree(eeepc->hotplug_slot);
+        eeepc->hotplug_slot = NULL;
 error_slot:
         return ret;
 }
 
+/*
+ * Rfkill devices
+ */
+static int eeepc_rfkill_set(void *data, bool blocked)
+{
+        acpi_handle handle = data;
+
+        return write_acpi_int(handle, NULL, !blocked);
+}
+
+static const struct rfkill_ops eeepc_rfkill_ops = {
+        .set_block = eeepc_rfkill_set,
+};
+
+static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
+                            struct rfkill **rfkill,
+                            const char *name,
+                            enum rfkill_type type, int cm)
+{
+        acpi_handle handle;
+        int result;
+
+        result = acpi_setter_handle(eeepc, cm, &handle);
+        if (result < 0)
+                return result;
+
+        *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
+                               &eeepc_rfkill_ops, handle);
+
+        if (!*rfkill)
+                return -EINVAL;
+
+        rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
+        result = rfkill_register(*rfkill);
+        if (result) {
+                rfkill_destroy(*rfkill);
+                *rfkill = NULL;
+                return result;
+        }
+        return 0;
+}
+
+static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
+{
+        eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
+        eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
+        eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
+        if (eeepc->wlan_rfkill) {
+                rfkill_unregister(eeepc->wlan_rfkill);
+                rfkill_destroy(eeepc->wlan_rfkill);
+                eeepc->wlan_rfkill = NULL;
+        }
+        /*
+         * Refresh pci hotplug in case the rfkill state was changed after
+         * eeepc_unregister_rfkill_notifier()
+         */
+        eeepc_rfkill_hotplug(eeepc);
+        if (eeepc->hotplug_slot)
+                pci_hp_deregister(eeepc->hotplug_slot);
+
+        if (eeepc->bluetooth_rfkill) {
+                rfkill_unregister(eeepc->bluetooth_rfkill);
+                rfkill_destroy(eeepc->bluetooth_rfkill);
+                eeepc->bluetooth_rfkill = NULL;
+        }
+        if (eeepc->wwan3g_rfkill) {
+                rfkill_unregister(eeepc->wwan3g_rfkill);
+                rfkill_destroy(eeepc->wwan3g_rfkill);
+                eeepc->wwan3g_rfkill = NULL;
+        }
+        if (eeepc->wimax_rfkill) {
+                rfkill_unregister(eeepc->wimax_rfkill);
+                rfkill_destroy(eeepc->wimax_rfkill);
+                eeepc->wimax_rfkill = NULL;
+        }
+}
+
+static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
+{
+        int result = 0;
+
+        mutex_init(&eeepc->hotplug_lock);
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
+                                  "eeepc-wlan", RFKILL_TYPE_WLAN,
+                                  CM_ASL_WLAN);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
+                                  "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
+                                  CM_ASL_BLUETOOTH);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
+                                  "eeepc-wwan3g", RFKILL_TYPE_WWAN,
+                                  CM_ASL_3G);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+        result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
+                                  "eeepc-wimax", RFKILL_TYPE_WIMAX,
+                                  CM_ASL_WIMAX);
+
+        if (result && result != -ENODEV)
+                goto exit;
+
+        if (eeepc->hotplug_disabled)
+                return 0;
+
+        result = eeepc_setup_pci_hotplug(eeepc);
+        /*
+         * If we get -EBUSY then something else is handling the PCI hotplug -
+         * don't fail in this case
+         */
+        if (result == -EBUSY)
+                result = 0;
+
+        eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
+        eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
+        eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
+        /*
+         * Refresh pci hotplug in case the rfkill state was changed during
+         * setup.
+         */
+        eeepc_rfkill_hotplug(eeepc);
+
+exit:
+        if (result && result != -ENODEV)
+                eeepc_rfkill_exit(eeepc);
+        return result;
+}
+
+/*
+ * Platform driver - hibernate/resume callbacks
+ */
 static int eeepc_hotk_thaw(struct device *device)
 {
-        if (ehotk->wlan_rfkill) {
+        struct eeepc_laptop *eeepc = dev_get_drvdata(device);
+
+        if (eeepc->wlan_rfkill) {
                 bool wlan;
 
                 /*
@@ -840,8 +904,8 @@ static int eeepc_hotk_thaw(struct device *device)
                  * during suspend.  Normally it restores it on resume, but
                  * we should kick it ourselves in case hibernation is aborted.
                  */
-                wlan = get_acpi(CM_ASL_WLAN);
-                set_acpi(CM_ASL_WLAN, wlan);
+                wlan = get_acpi(eeepc, CM_ASL_WLAN);
+                set_acpi(eeepc, CM_ASL_WLAN, wlan);
         }
 
         return 0;
@@ -849,70 +913,96 @@ static int eeepc_hotk_thaw(struct device *device)
 
 static int eeepc_hotk_restore(struct device *device)
 {
+        struct eeepc_laptop *eeepc = dev_get_drvdata(device);
+
         /* Refresh both wlan rfkill state and pci hotplug */
-        if (ehotk->wlan_rfkill)
-                eeepc_rfkill_hotplug();
-
-        if (ehotk->bluetooth_rfkill)
-                rfkill_set_sw_state(ehotk->bluetooth_rfkill,
-                                    get_acpi(CM_ASL_BLUETOOTH) != 1);
-        if (ehotk->wwan3g_rfkill)
-                rfkill_set_sw_state(ehotk->wwan3g_rfkill,
-                                    get_acpi(CM_ASL_3G) != 1);
-        if (ehotk->wimax_rfkill)
-                rfkill_set_sw_state(ehotk->wimax_rfkill,
-                                    get_acpi(CM_ASL_WIMAX) != 1);
+        if (eeepc->wlan_rfkill)
+                eeepc_rfkill_hotplug(eeepc);
+
+        if (eeepc->bluetooth_rfkill)
+                rfkill_set_sw_state(eeepc->bluetooth_rfkill,
+                                    get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
+        if (eeepc->wwan3g_rfkill)
+                rfkill_set_sw_state(eeepc->wwan3g_rfkill,
+                                    get_acpi(eeepc, CM_ASL_3G) != 1);
+        if (eeepc->wimax_rfkill)
+                rfkill_set_sw_state(eeepc->wimax_rfkill,
+                                    get_acpi(eeepc, CM_ASL_WIMAX) != 1);
 
         return 0;
 }
 
+static const struct dev_pm_ops eeepc_pm_ops = {
+        .thaw = eeepc_hotk_thaw,
+        .restore = eeepc_hotk_restore,
+};
+
+static struct platform_driver platform_driver = {
+        .driver = {
+                .name = EEEPC_LAPTOP_FILE,
+                .owner = THIS_MODULE,
+                .pm = &eeepc_pm_ops,
+        }
+};
+
 /*
- * Hwmon
+ * Hwmon device
  */
+
+#define EEEPC_EC_SC00      0x61
+#define EEEPC_EC_FAN_PWM   (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
+#define EEEPC_EC_FAN_HRPM  (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
+#define EEEPC_EC_FAN_LRPM  (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
+
+#define EEEPC_EC_SFB0      0xD0
+#define EEEPC_EC_FAN_CTRL  (EEEPC_EC_SFB0 + 3) /* Byte containing SF25  */
+
 static int eeepc_get_fan_pwm(void)
 {
-        int value = 0;
+        u8 value = 0;
 
-        read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
-        value = value * 255 / 100;
-        return (value);
+        ec_read(EEEPC_EC_FAN_PWM, &value);
+        return value * 255 / 100;
 }
 
 static void eeepc_set_fan_pwm(int value)
 {
         value = SENSORS_LIMIT(value, 0, 255);
         value = value * 100 / 255;
-        ec_write(EEEPC_EC_SC02, value);
+        ec_write(EEEPC_EC_FAN_PWM, value);
 }
 
 static int eeepc_get_fan_rpm(void)
 {
-        int high = 0;
-        int low = 0;
+        u8 high = 0;
+        u8 low = 0;
 
-        read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
-        read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
-        return (high << 8 | low);
+        ec_read(EEEPC_EC_FAN_HRPM, &high);
+        ec_read(EEEPC_EC_FAN_LRPM, &low);
+        return high << 8 | low;
 }
 
 static int eeepc_get_fan_ctrl(void)
 {
-        int value = 0;
+        u8 value = 0;
 
-        read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
-        return ((value & 0x02 ? 1 : 0));
+        ec_read(EEEPC_EC_FAN_CTRL, &value);
+        if (value & 0x02)
+                return 1; /* manual */
+        else
+                return 2; /* automatic */
 }
 
 static void eeepc_set_fan_ctrl(int manual)
 {
-        int value = 0;
+        u8 value = 0;
 
-        read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
-        if (manual)
+        ec_read(EEEPC_EC_FAN_CTRL, &value);
+        if (manual == 1)
                 value |= 0x02;
         else
                 value &= ~0x02;
-        ec_write(EEEPC_EC_SFB3, value);
+        ec_write(EEEPC_EC_FAN_CTRL, value);
 }
 
 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
@@ -970,348 +1060,464 @@ static struct attribute_group hwmon_attribute_group = {
         .attrs = hwmon_attributes
 };
 
-/*
- * exit/init
- */
-static void eeepc_backlight_exit(void)
+static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
 {
-        if (eeepc_backlight_device)
-                backlight_device_unregister(eeepc_backlight_device);
-        eeepc_backlight_device = NULL;
+        struct device *hwmon;
+
+        hwmon = eeepc->hwmon_device;
+        if (!hwmon)
+                return;
+        sysfs_remove_group(&hwmon->kobj,
+                           &hwmon_attribute_group);
+        hwmon_device_unregister(hwmon);
+        eeepc->hwmon_device = NULL;
 }
 
-static void eeepc_rfkill_exit(void)
+static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
 {
-        eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P5");
-        eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
-        eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
-        if (ehotk->wlan_rfkill) {
-                rfkill_unregister(ehotk->wlan_rfkill);
-                rfkill_destroy(ehotk->wlan_rfkill);
-                ehotk->wlan_rfkill = NULL;
-        }
-        /*
-         * Refresh pci hotplug in case the rfkill state was changed after
-         * eeepc_unregister_rfkill_notifier()
-         */
-        eeepc_rfkill_hotplug();
-        if (ehotk->hotplug_slot)
-                pci_hp_deregister(ehotk->hotplug_slot);
-
-        if (ehotk->bluetooth_rfkill) {
-                rfkill_unregister(ehotk->bluetooth_rfkill);
-                rfkill_destroy(ehotk->bluetooth_rfkill);
-                ehotk->bluetooth_rfkill = NULL;
-        }
-        if (ehotk->wwan3g_rfkill) {
-                rfkill_unregister(ehotk->wwan3g_rfkill);
-                rfkill_destroy(ehotk->wwan3g_rfkill);
-                ehotk->wwan3g_rfkill = NULL;
-        }
-        if (ehotk->wimax_rfkill) {
-                rfkill_unregister(ehotk->wimax_rfkill);
-                rfkill_destroy(ehotk->wimax_rfkill);
-                ehotk->wimax_rfkill = NULL;
+        struct device *hwmon;
+        int result;
+
+        hwmon = hwmon_device_register(&eeepc->platform_device->dev);
+        if (IS_ERR(hwmon)) {
+                pr_err("Could not register eeepc hwmon device\n");
+                eeepc->hwmon_device = NULL;
+                return PTR_ERR(hwmon);
         }
+        eeepc->hwmon_device = hwmon;
+        result = sysfs_create_group(&hwmon->kobj,
+                                    &hwmon_attribute_group);
+        if (result)
+                eeepc_hwmon_exit(eeepc);
+        return result;
 }
 
-static void eeepc_input_exit(void)
+/*
+ * Backlight device
+ */
+static int read_brightness(struct backlight_device *bd)
 {
-        if (ehotk->inputdev)
-                input_unregister_device(ehotk->inputdev);
+        struct eeepc_laptop *eeepc = bl_get_data(bd);
+
+        return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
 }
 
-static void eeepc_hwmon_exit(void)
+static int set_brightness(struct backlight_device *bd, int value)
 {
-        struct device *hwmon;
+        struct eeepc_laptop *eeepc = bl_get_data(bd);
 
-        hwmon = eeepc_hwmon_device;
-        if (!hwmon)
-                return ;
-        sysfs_remove_group(&hwmon->kobj,
-                           &hwmon_attribute_group);
-        hwmon_device_unregister(hwmon);
-        eeepc_hwmon_device = NULL;
+        return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
 }
 
-static int eeepc_new_rfkill(struct rfkill **rfkill,
-                            const char *name, struct device *dev,
-                            enum rfkill_type type, int cm)
+static int update_bl_status(struct backlight_device *bd)
 {
-        int result;
+        return set_brightness(bd, bd->props.brightness);
+}
 
-        result = get_acpi(cm);
-        if (result < 0)
-                return result;
+static struct backlight_ops eeepcbl_ops = {
+        .get_brightness = read_brightness,
+        .update_status = update_bl_status,
+};
 
-        *rfkill = rfkill_alloc(name, dev, type,
-                               &eeepc_rfkill_ops, (void *)(unsigned long)cm);
+static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
+{
+        struct backlight_device *bd = eeepc->backlight_device;
+        int old = bd->props.brightness;
 
-        if (!*rfkill)
-                return -EINVAL;
+        backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
 
-        rfkill_init_sw_state(*rfkill, get_acpi(cm) != 1);
-        result = rfkill_register(*rfkill);
-        if (result) {
-                rfkill_destroy(*rfkill);
-                *rfkill = NULL;
-                return result;
+        return old;
+}
+
+static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
+{
+        struct backlight_properties props;
+        struct backlight_device *bd;
+
+        memset(&props, 0, sizeof(struct backlight_properties));
+        props.max_brightness = 15;
+        bd = backlight_device_register(EEEPC_LAPTOP_FILE,
+                                       &eeepc->platform_device->dev, eeepc,
+                                       &eeepcbl_ops, &props);
+        if (IS_ERR(bd)) {
+                pr_err("Could not register eeepc backlight device\n");
+                eeepc->backlight_device = NULL;
+                return PTR_ERR(bd);
         }
+        eeepc->backlight_device = bd;
+        bd->props.brightness = read_brightness(bd);
+        bd->props.power = FB_BLANK_UNBLANK;
+        backlight_update_status(bd);
         return 0;
 }
 
+static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
+{
+        if (eeepc->backlight_device)
+                backlight_device_unregister(eeepc->backlight_device);
+        eeepc->backlight_device = NULL;
+}
 
-static int eeepc_rfkill_init(struct device *dev)
+
+/*
+ * Input device (i.e. hotkeys)
+ */
+static int eeepc_input_init(struct eeepc_laptop *eeepc)
 {
-        int result = 0;
+        struct input_dev *input;
+        int error;
 
-        mutex_init(&ehotk->hotplug_lock);
+        input = input_allocate_device();
+        if (!input) {
+                pr_info("Unable to allocate input device\n");
+                return -ENOMEM;
+        }
 
-        result = eeepc_new_rfkill(&ehotk->wlan_rfkill,
-                                  "eeepc-wlan", dev,
-                                  RFKILL_TYPE_WLAN, CM_ASL_WLAN);
+        input->name = "Asus EeePC extra buttons";
+        input->phys = EEEPC_LAPTOP_FILE "/input0";
+        input->id.bustype = BUS_HOST;
+        input->dev.parent = &eeepc->platform_device->dev;
 
-        if (result && result != -ENODEV)
-                goto exit;
+        error = sparse_keymap_setup(input, eeepc_keymap, NULL);
+        if (error) {
+                pr_err("Unable to setup input device keymap\n");
+                goto err_free_dev;
+        }
 
-        result = eeepc_new_rfkill(&ehotk->bluetooth_rfkill,
-                                  "eeepc-bluetooth", dev,
-                                  RFKILL_TYPE_BLUETOOTH, CM_ASL_BLUETOOTH);
+        error = input_register_device(input);
+        if (error) {
+                pr_err("Unable to register input device\n");
+                goto err_free_keymap;
+        }
 
-        if (result && result != -ENODEV)
-                goto exit;
+        eeepc->inputdev = input;
+        return 0;
 
-        result = eeepc_new_rfkill(&ehotk->wwan3g_rfkill,
-                                  "eeepc-wwan3g", dev,
-                                  RFKILL_TYPE_WWAN, CM_ASL_3G);
+ err_free_keymap:
+        sparse_keymap_free(input);
+ err_free_dev:
+        input_free_device(input);
+        return error;
+}
 
-        if (result && result != -ENODEV)
-                goto exit;
+static void eeepc_input_exit(struct eeepc_laptop *eeepc)
+{
+        if (eeepc->inputdev) {
+                sparse_keymap_free(eeepc->inputdev);
+                input_unregister_device(eeepc->inputdev);
+        }
+}
 
-        result = eeepc_new_rfkill(&ehotk->wimax_rfkill,
-                                  "eeepc-wimax", dev,
-                                  RFKILL_TYPE_WIMAX, CM_ASL_WIMAX);
+/*
+ * ACPI driver
+ */
+static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
+{
+        struct eeepc_laptop *eeepc = acpi_driver_data(device);
+        u16 count;
 
-        if (result && result != -ENODEV)
-                goto exit;
+        if (event > ACPI_MAX_SYS_NOTIFY)
+                return;
+        count = eeepc->event_count[event % 128]++;
+        acpi_bus_generate_proc_event(device, event, count);
+        acpi_bus_generate_netlink_event(device->pnp.device_class,
+                                        dev_name(&device->dev), event,
+                                        count);
+
+        /* Brightness events are special */
+        if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
+
+                /* Ignore them completely if the acpi video driver is used */
+                if (eeepc->backlight_device != NULL) {
+                        int old_brightness, new_brightness;
+
+                        /* Update the backlight device. */
+                        old_brightness = eeepc_backlight_notify(eeepc);
+
+                        /* Convert event to keypress (obsolescent hack) */
+                        new_brightness = event - NOTIFY_BRN_MIN;
+
+                        if (new_brightness < old_brightness) {
+                                event = NOTIFY_BRN_MIN; /* brightness down */
+                        } else if (new_brightness > old_brightness) {
+                                event = NOTIFY_BRN_MAX; /* brightness up */
+                        } else {
+                                /*
+                                * no change in brightness - already at min/max,
+                                * event will be desired value (or else ignored)
+                                */
+                        }
+                        sparse_keymap_report_event(eeepc->inputdev, event,
+                                                   1, true);
+                }
+        } else {
+                /* Everything else is a bona-fide keypress event */
+                sparse_keymap_report_event(eeepc->inputdev, event, 1, true);
+        }
+}
+
+static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
+{
+        const char *model;
+
+        model = dmi_get_system_info(DMI_PRODUCT_NAME);
+        if (!model)
+                return;
 
-        result = eeepc_setup_pci_hotplug();
         /*
-         * If we get -EBUSY then something else is handling the PCI hotplug -
-         * don't fail in this case
+         * Blacklist for setting cpufv (cpu speed).
+         *
+         * EeePC 4G ("701") implements CFVS, but it is not supported
+         * by the pre-installed OS, and the original option to change it
+         * in the BIOS setup screen was removed in later versions.
+         *
+         * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
+         * this applies to all "701" models (4G/4G Surf/2G Surf).
+         *
+         * So Asus made a deliberate decision not to support it on this model.
+         * We have several reports that using it can cause the system to hang
+         *
+         * The hang has also been reported on a "702" (Model name "8G"?).
+         *
+         * We avoid dmi_check_system() / dmi_match(), because they use
+         * substring matching.  We don't want to affect the "701SD"
+         * and "701SDX" models, because they do support S.H.E.
          */
-        if (result == -EBUSY)
-                result = 0;
+        if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
+                eeepc->cpufv_disabled = true;
+                pr_info("model %s does not officially support setting cpu "
+                        "speed\n", model);
+                pr_info("cpufv disabled to avoid instability\n");
+        }
 
-        eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P5");
-        eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
-        eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
         /*
-         * Refresh pci hotplug in case the rfkill state was changed during
-         * setup.
+         * Blacklist for wlan hotplug
+         *
+         * Eeepc 1005HA doesn't work like others models and don't need the
+         * hotplug code. In fact, current hotplug code seems to unplug another
+         * device...
          */
-        eeepc_rfkill_hotplug();
-
-exit:
-        if (result && result != -ENODEV)
-                eeepc_rfkill_exit();
-        return result;
+        if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
+            strcmp(model, "1005PE") == 0) {
+                eeepc->hotplug_disabled = true;
+                pr_info("wlan hotplug disabled\n");
+        }
 }
 
-static int eeepc_backlight_init(struct device *dev)
+static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
 {
-        struct backlight_device *bd;
+        int dummy;
 
-        bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
-                                       NULL, &eeepcbl_ops);
-        if (IS_ERR(bd)) {
-                pr_err("Could not register eeepc backlight device\n");
-                eeepc_backlight_device = NULL;
-                return PTR_ERR(bd);
+        /* Some BIOSes do not report cm although it is avaliable.
+           Check if cm_getv[cm] works and, if yes, assume cm should be set. */
+        if (!(eeepc->cm_supported & (1 << cm))
+            && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
+                pr_info("%s (%x) not reported by BIOS,"
+                        " enabling anyway\n", name, 1 << cm);
+                eeepc->cm_supported |= 1 << cm;
         }
-        eeepc_backlight_device = bd;
-        bd->props.max_brightness = 15;
-        bd->props.brightness = read_brightness(NULL);
-        bd->props.power = FB_BLANK_UNBLANK;
-        backlight_update_status(bd);
-        return 0;
 }
 
-static int eeepc_hwmon_init(struct device *dev)
+static void cmsg_quirks(struct eeepc_laptop *eeepc)
 {
-        struct device *hwmon;
-        int result;
-
-        hwmon = hwmon_device_register(dev);
-        if (IS_ERR(hwmon)) {
-                pr_err("Could not register eeepc hwmon device\n");
-                eeepc_hwmon_device = NULL;
-                return PTR_ERR(hwmon);
-        }
-        eeepc_hwmon_device = hwmon;
-        result = sysfs_create_group(&hwmon->kobj,
-                                    &hwmon_attribute_group);
-        if (result)
-                eeepc_hwmon_exit();
-        return result;
+        cmsg_quirk(eeepc, CM_ASL_LID, "LID");
+        cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
+        cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
+        cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
 }
 
-static int eeepc_input_init(struct device *dev)
+static int eeepc_acpi_init(struct eeepc_laptop *eeepc,
+                           struct acpi_device *device)
 {
-        const struct key_entry *key;
+        unsigned int init_flags;
         int result;
 
-        ehotk->inputdev = input_allocate_device();
-        if (!ehotk->inputdev) {
-                pr_info("Unable to allocate input device\n");
-                return -ENOMEM;
+        result = acpi_bus_get_status(device);
+        if (result)
+                return result;
+        if (!device->status.present) {
+                pr_err("Hotkey device not present, aborting\n");
+                return -ENODEV;
         }
-        ehotk->inputdev->name = "Asus EeePC extra buttons";
-        ehotk->inputdev->dev.parent = dev;
-        ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
-        ehotk->inputdev->id.bustype = BUS_HOST;
-        ehotk->inputdev->getkeycode = eeepc_getkeycode;
-        ehotk->inputdev->setkeycode = eeepc_setkeycode;
-
-        for (key = eeepc_keymap; key->type != KE_END; key++) {
-                switch (key->type) {
-                case KE_KEY:
-                        set_bit(EV_KEY, ehotk->inputdev->evbit);
-                        set_bit(key->keycode, ehotk->inputdev->keybit);
-                        break;
-                }
+
+        init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
+        pr_notice("Hotkey init flags 0x%x\n", init_flags);
+
+        if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
+                pr_err("Hotkey initialization failed\n");
+                return -ENODEV;
         }
-        result = input_register_device(ehotk->inputdev);
-        if (result) {
-                pr_info("Unable to register input device\n");
-                input_free_device(ehotk->inputdev);
-                return result;
+
+        /* get control methods supported */
+        if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
+                pr_err("Get control methods supported failed\n");
+                return -ENODEV;
         }
+        cmsg_quirks(eeepc);
+        pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
+
         return 0;
 }
 
-static int __devinit eeepc_hotk_add(struct acpi_device *device)
+static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
 {
-        struct device *dev;
+        /*
+         * If the following call to set_acpi() fails, it's because there's no
+         * camera so we can ignore the error.
+         */
+        if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
+                set_acpi(eeepc, CM_ASL_CAMERA, 1);
+}
+
+static bool eeepc_device_present;
+
+static int __devinit eeepc_acpi_add(struct acpi_device *device)
+{
+        struct eeepc_laptop *eeepc;
         int result;
 
-        if (!device)
-                return -EINVAL;
-        pr_notice(EEEPC_HOTK_NAME "\n");
-        ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
-        if (!ehotk)
+        pr_notice(EEEPC_LAPTOP_NAME "\n");
+        eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
+        if (!eeepc)
                 return -ENOMEM;
-        ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
-        ehotk->handle = device->handle;
-        strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
-        strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
-        device->driver_data = ehotk;
-        ehotk->device = device;
-
-        result = eeepc_hotk_check();
-        if (result)
-                goto fail_platform_driver;
-        eeepc_enable_camera();
+        eeepc->handle = device->handle;
+        strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
+        strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
+        device->driver_data = eeepc;
 
-        /* Register platform stuff */
-        result = platform_driver_register(&platform_driver);
-        if (result)
-                goto fail_platform_driver;
-        platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
-        if (!platform_device) {
-                result = -ENOMEM;
-                goto fail_platform_device1;
-        }
-        result = platform_device_add(platform_device);
-        if (result)
-                goto fail_platform_device2;
-        result = sysfs_create_group(&platform_device->dev.kobj,
-                                    &platform_attribute_group);
+        eeepc->hotplug_disabled = hotplug_disabled;
+
+        eeepc_dmi_check(eeepc);
+
+        result = eeepc_acpi_init(eeepc, device);
         if (result)
-                goto fail_sysfs;
+                goto fail_platform;
+        eeepc_enable_camera(eeepc);
 
-        dev = &platform_device->dev;
+        /*
+         * Register the platform device first.  It is used as a parent for the
+         * sub-devices below.
+         *
+         * Note that if there are multiple instances of this ACPI device it
+         * will bail out, because the platform device is registered with a
+         * fixed name.  Of course it doesn't make sense to have more than one,
+         * and machine-specific scripts find the fixed name convenient.  But
+         * It's also good for us to exclude multiple instances because both
+         * our hwmon and our wlan rfkill subdevice use global ACPI objects
+         * (the EC and the wlan PCI slot respectively).
+         */
+        result = eeepc_platform_init(eeepc);
+        if (result)
+                goto fail_platform;
 
         if (!acpi_video_backlight_support()) {
-                result = eeepc_backlight_init(dev);
+                result = eeepc_backlight_init(eeepc);
                 if (result)
                         goto fail_backlight;
         } else
-                pr_info("Backlight controlled by ACPI video "
-                        "driver\n");
+                pr_info("Backlight controlled by ACPI video driver\n");
 
-        result = eeepc_input_init(dev);
+        result = eeepc_input_init(eeepc);
         if (result)
                 goto fail_input;
 
-        result = eeepc_hwmon_init(dev);
+        result = eeepc_hwmon_init(eeepc);
         if (result)
                 goto fail_hwmon;
 
-        result = eeepc_rfkill_init(dev);
+        result = eeepc_led_init(eeepc);
+        if (result)
+                goto fail_led;
+
+        result = eeepc_rfkill_init(eeepc);
         if (result)
                 goto fail_rfkill;
 
+        eeepc_device_present = true;
         return 0;
 
 fail_rfkill:
-        eeepc_hwmon_exit();
+        eeepc_led_exit(eeepc);
+fail_led:
+        eeepc_hwmon_exit(eeepc);
 fail_hwmon:
-        eeepc_input_exit();
+        eeepc_input_exit(eeepc);
 fail_input:
-        eeepc_backlight_exit();
+        eeepc_backlight_exit(eeepc);
 fail_backlight:
-        sysfs_remove_group(&platform_device->dev.kobj,
-                           &platform_attribute_group);
-fail_sysfs:
-        platform_device_del(platform_device);
-fail_platform_device2:
-        platform_device_put(platform_device);
-fail_platform_device1:
-        platform_driver_unregister(&platform_driver);
-fail_platform_driver:
-        kfree(ehotk);
+        eeepc_platform_exit(eeepc);
+fail_platform:
+        kfree(eeepc);
 
         return result;
 }
 
-static int eeepc_hotk_remove(struct acpi_device *device, int type)
+static int eeepc_acpi_remove(struct acpi_device *device, int type)
 {
-        if (!device || !acpi_driver_data(device))
-                return -EINVAL;
+        struct eeepc_laptop *eeepc = acpi_driver_data(device);
 
-        eeepc_backlight_exit();
-        eeepc_rfkill_exit();
-        eeepc_input_exit();
-        eeepc_hwmon_exit();
-        sysfs_remove_group(&platform_device->dev.kobj,
-                           &platform_attribute_group);
-        platform_device_unregister(platform_device);
-        platform_driver_unregister(&platform_driver);
+        eeepc_backlight_exit(eeepc);
+        eeepc_rfkill_exit(eeepc);
+        eeepc_input_exit(eeepc);
+        eeepc_hwmon_exit(eeepc);
+        eeepc_led_exit(eeepc);
+        eeepc_platform_exit(eeepc);
 
-        kfree(ehotk);
+        kfree(eeepc);
         return 0;
 }
 
+
+static const struct acpi_device_id eeepc_device_ids[] = {
+        {EEEPC_ACPI_HID, 0},
+        {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
+
+static struct acpi_driver eeepc_acpi_driver = {
+        .name = EEEPC_LAPTOP_NAME,
+        .class = EEEPC_ACPI_CLASS,
+        .owner = THIS_MODULE,
+        .ids = eeepc_device_ids,
+        .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
+        .ops = {
+                .add = eeepc_acpi_add,
+                .remove = eeepc_acpi_remove,
+                .notify = eeepc_acpi_notify,
+        },
+};
+
+
 static int __init eeepc_laptop_init(void)
 {
         int result;
 
-        if (acpi_disabled)
-                return -ENODEV;
-        result = acpi_bus_register_driver(&eeepc_hotk_driver);
+        result = platform_driver_register(&platform_driver);
         if (result < 0)
                 return result;
-        if (!ehotk) {
-                acpi_bus_unregister_driver(&eeepc_hotk_driver);
-                return -ENODEV;
+
+        result = acpi_bus_register_driver(&eeepc_acpi_driver);
+        if (result < 0)
+                goto fail_acpi_driver;
+
+        if (!eeepc_device_present) {
+                result = -ENODEV;
+                goto fail_no_device;
         }
+
         return 0;
+
+fail_no_device:
+        acpi_bus_unregister_driver(&eeepc_acpi_driver);
+fail_acpi_driver:
+        platform_driver_unregister(&platform_driver);
+        return result;
 }
 
 static void __exit eeepc_laptop_exit(void)
 {
-        acpi_bus_unregister_driver(&eeepc_hotk_driver);
+        acpi_bus_unregister_driver(&eeepc_acpi_driver);
+        platform_driver_unregister(&platform_driver);
 }
 
 module_init(eeepc_laptop_init);