Merge branch 'linux-next' of git://cavan.codon.org.uk/platform-drivers-x86

Pull x86 platform driver updates from Matthew Garrett:
 "Nothing overly dramatic here - improved support for the Classmate,
  some random small fixes and a rework of backlight management to deal
  with some of the more awkward cases."

* 'linux-next' of git://cavan.codon.org.uk/platform-drivers-x86:
  thinkpad_acpi: Free hotkey_keycode_map after unregistering tpacpi_inputdev
  thinkpad_acpi: Fix a memory leak during module exit
  thinkpad_acpi: Flush the workqueue before freeing tpacpi_leds
  dell-laptop: Add 6 machines to touchpad led quirk
  ACER: Fix Smatch double-free issue
  ACER: Fix up sparse warning
  asus-nb-wmi: add some video toggle keys
  asus-nb-wmi: add wapf quirk for ASUS machines
  classmate-laptop: Fix extra keys hardware id.
  classmate-laptop: Add support for Classmate V4 accelerometer.
  asus-wmi: enable resume on lid open
  asus-wmi: control backlight power through WMI, not ACPI
  samsung-laptop: support R40/R41
  acpi/video_detect: blacklist samsung x360
  samsung-laptop: X360 ACPI backlight device is broken
  drivers-platform-x86: use acpi_video_dmi_promote_vendor()
  acpi: add a way to promote/demote vendor backlight drivers
  ACER: Add support for accelerometer sensor
  asus-wmi: use ASUS_WMI_METHODID_DSTS2 as default DSTS ID.

10 files changed, 789 insertions, 32 deletions

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index c8f40c9c0428..3782e1cd3697 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -95,6 +95,7 @@ MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
 
 enum acer_wmi_event_ids {
         WMID_HOTKEY_EVENT = 0x1,
+        WMID_ACCEL_EVENT = 0x5,
 };
 
 static const struct key_entry acer_wmi_keymap[] = {
@@ -130,6 +131,7 @@ static const struct key_entry acer_wmi_keymap[] = {
 };
 
 static struct input_dev *acer_wmi_input_dev;
+static struct input_dev *acer_wmi_accel_dev;
 
 struct event_return_value {
         u8 function;
@@ -200,6 +202,7 @@ struct hotkey_function_type_aa {
 #define ACER_CAP_BLUETOOTH              (1<<2)
 #define ACER_CAP_BRIGHTNESS             (1<<3)
 #define ACER_CAP_THREEG                 (1<<4)
+#define ACER_CAP_ACCEL                  (1<<5)
 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 
 /*
@@ -1399,6 +1402,60 @@ static void acer_backlight_exit(void)
 }
 
 /*
+ * Accelerometer device
+ */
+static acpi_handle gsensor_handle;
+
+static int acer_gsensor_init(void)
+{
+        acpi_status status;
+        struct acpi_buffer output;
+        union acpi_object out_obj;
+
+        output.length = sizeof(out_obj);
+        output.pointer = &out_obj;
+        status = acpi_evaluate_object(gsensor_handle, "_INI", NULL, &output);
+        if (ACPI_FAILURE(status))
+                return -1;
+
+        return 0;
+}
+
+static int acer_gsensor_open(struct input_dev *input)
+{
+        return acer_gsensor_init();
+}
+
+static int acer_gsensor_event(void)
+{
+        acpi_status status;
+        struct acpi_buffer output;
+        union acpi_object out_obj[5];
+
+        if (!has_cap(ACER_CAP_ACCEL))
+                return -1;
+
+        output.length = sizeof(out_obj);
+        output.pointer = out_obj;
+
+        status = acpi_evaluate_object(gsensor_handle, "RDVL", NULL, &output);
+        if (ACPI_FAILURE(status))
+                return -1;
+
+        if (out_obj->package.count != 4)
+                return -1;
+
+        input_report_abs(acer_wmi_accel_dev, ABS_X,
+                (s16)out_obj->package.elements[0].integer.value);
+        input_report_abs(acer_wmi_accel_dev, ABS_Y,
+                (s16)out_obj->package.elements[1].integer.value);
+        input_report_abs(acer_wmi_accel_dev, ABS_Z,
+                (s16)out_obj->package.elements[2].integer.value);
+        input_sync(acer_wmi_accel_dev);
+        return 0;
+}
+
+/*
  * Rfkill devices
  */
 static void acer_rfkill_update(struct work_struct *ignored);
@@ -1673,6 +1730,9 @@ static void acer_wmi_notify(u32 value, void *context)
                                                    1, true);
                 }
                 break;
+        case WMID_ACCEL_EVENT:
+                acer_gsensor_event();
+                break;
         default:
                 pr_warn("Unknown function number - %d - %d\n",
                         return_value.function, return_value.key_num);
@@ -1758,6 +1818,73 @@ static int acer_wmi_enable_lm(void)
         return status;
 }
 
+static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
+                                                void *ctx, void **retval)
+{
+        *(acpi_handle *)retval = ah;
+        return AE_OK;
+}
+
+static int __init acer_wmi_get_handle(const char *name, const char *prop,
+                                        acpi_handle *ah)
+{
+        acpi_status status;
+        acpi_handle handle;
+
+        BUG_ON(!name || !ah);
+
+        handle = NULL;
+        status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
+                                        (void *)name, &handle);
+
+        if (ACPI_SUCCESS(status)) {
+                *ah = handle;
+                return 0;
+        } else {
+                return -ENODEV;
+        }
+}
+
+static int __init acer_wmi_accel_setup(void)
+{
+        int err;
+
+        err = acer_wmi_get_handle("SENR", "BST0001", &gsensor_handle);
+        if (err)
+                return err;
+
+        interface->capability |= ACER_CAP_ACCEL;
+
+        acer_wmi_accel_dev = input_allocate_device();
+        if (!acer_wmi_accel_dev)
+                return -ENOMEM;
+
+        acer_wmi_accel_dev->open = acer_gsensor_open;
+
+        acer_wmi_accel_dev->name = "Acer BMA150 accelerometer";
+        acer_wmi_accel_dev->phys = "wmi/input1";
+        acer_wmi_accel_dev->id.bustype = BUS_HOST;
+        acer_wmi_accel_dev->evbit[0] = BIT_MASK(EV_ABS);
+        input_set_abs_params(acer_wmi_accel_dev, ABS_X, -16384, 16384, 0, 0);
+        input_set_abs_params(acer_wmi_accel_dev, ABS_Y, -16384, 16384, 0, 0);
+        input_set_abs_params(acer_wmi_accel_dev, ABS_Z, -16384, 16384, 0, 0);
+
+        err = input_register_device(acer_wmi_accel_dev);
+        if (err)
+                goto err_free_dev;
+
+        return 0;
+
+err_free_dev:
+        input_free_device(acer_wmi_accel_dev);
+        return err;
+}
+
+static void acer_wmi_accel_destroy(void)
+{
+        input_unregister_device(acer_wmi_accel_dev);
+}
+
 static int __init acer_wmi_input_setup(void)
 {
         acpi_status status;
@@ -1912,6 +2039,9 @@ static int acer_resume(struct device *dev)
         if (has_cap(ACER_CAP_BRIGHTNESS))
                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
 
+        if (has_cap(ACER_CAP_ACCEL))
+                acer_gsensor_init();
+
         return 0;
 }
 
@@ -2060,14 +2190,16 @@ static int __init acer_wmi_init(void)
 
         set_quirks();
 
+        if (dmi_check_system(video_vendor_dmi_table))
+                acpi_video_dmi_promote_vendor();
         if (acpi_video_backlight_support()) {
-                if (dmi_check_system(video_vendor_dmi_table)) {
-                        acpi_video_unregister();
-                } else {
-                        interface->capability &= ~ACER_CAP_BRIGHTNESS;
-                        pr_info("Brightness must be controlled by "
-                                "acpi video driver\n");
-                }
+                interface->capability &= ~ACER_CAP_BRIGHTNESS;
+                pr_info("Brightness must be controlled by acpi video driver\n");
+        } else {
+#ifdef CONFIG_ACPI_VIDEO
+                pr_info("Disabling ACPI video driver\n");
+                acpi_video_unregister();
+#endif
         }
 
         if (wmi_has_guid(WMID_GUID3)) {
@@ -2090,6 +2222,8 @@ static int __init acer_wmi_init(void)
                         return err;
         }
 
+        acer_wmi_accel_setup();
+
         err = platform_driver_register(&acer_platform_driver);
         if (err) {
                 pr_err("Unable to register platform driver\n");
@@ -2133,6 +2267,8 @@ error_device_alloc:
 error_platform_register:
         if (wmi_has_guid(ACERWMID_EVENT_GUID))
                 acer_wmi_input_destroy();
+        if (has_cap(ACER_CAP_ACCEL))
+                acer_wmi_accel_destroy();
 
         return err;
 }
@@ -2142,6 +2278,9 @@ static void __exit acer_wmi_exit(void)
         if (wmi_has_guid(ACERWMID_EVENT_GUID))
                 acer_wmi_input_destroy();
 
+        if (has_cap(ACER_CAP_ACCEL))
+                acer_wmi_accel_destroy();
+
         remove_sysfs(acer_platform_device);
         remove_debugfs();
         platform_device_unregister(acer_platform_device);
diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index 694a15a56230..905fa01ac8df 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -193,7 +193,10 @@ static int __devinit gmux_probe(struct pnp_dev *pnp,
          * backlight control and supports more levels than other options.
          * Disable the other backlight choices.
          */
+        acpi_video_dmi_promote_vendor();
+#ifdef CONFIG_ACPI_VIDEO
         acpi_video_unregister();
+#endif
         apple_bl_unregister();
 
         return 0;
@@ -213,7 +216,10 @@ static void __devexit gmux_remove(struct pnp_dev *pnp)
         release_region(gmux_data->iostart, gmux_data->iolen);
         kfree(gmux_data);
 
+        acpi_video_dmi_demote_vendor();
+#ifdef CONFIG_ACPI_VIDEO
         acpi_video_register();
+#endif
         apple_bl_register();
 }
 
diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index 99a30b513137..6b0ebdeae916 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -26,6 +26,7 @@
 #include <linux/input.h>
 #include <linux/input/sparse-keymap.h>
 #include <linux/fb.h>
+#include <linux/dmi.h>
 
 #include "asus-wmi.h"
 
@@ -48,18 +49,115 @@ MODULE_ALIAS("wmi:"ASUS_NB_WMI_EVENT_GUID);
  *  1  | Hardware  | Software
  *  4  | Software  | Software
  */
-static uint wapf;
+static int wapf = -1;
 module_param(wapf, uint, 0444);
 MODULE_PARM_DESC(wapf, "WAPF value");
 
+static struct quirk_entry *quirks;
+
 static struct quirk_entry quirk_asus_unknown = {
+        .wapf = 0,
+};
+
+static struct quirk_entry quirk_asus_x401u = {
+        .wapf = 4,
+};
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+        quirks = dmi->driver_data;
+        return 1;
+}
+
+static struct dmi_system_id asus_quirks[] = {
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X401U",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X401U"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X401A1",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X401A1"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X501U",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X501U"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X501A1",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X501A1"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X55A",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X55A"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X55C",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X55C"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X55U",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X55U"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. X55VD",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X55VD"),
+                },
+                .driver_data = &quirk_asus_x401u,
+        },
+        {},
 };
 
 static void asus_nb_wmi_quirks(struct asus_wmi_driver *driver)
 {
-        driver->quirks = &quirk_asus_unknown;
-        driver->quirks->wapf = wapf;
+        quirks = &quirk_asus_unknown;
+        dmi_check_system(asus_quirks);
+
+        driver->quirks = quirks;
         driver->panel_power = FB_BLANK_UNBLANK;
+
+        /* overwrite the wapf setting if the wapf paramater is specified */
+        if (wapf != -1)
+                quirks->wapf = wapf;
+        else
+                wapf = quirks->wapf;
 }
 
 static const struct key_entry asus_nb_wmi_keymap[] = {
@@ -94,6 +192,10 @@ static const struct key_entry asus_nb_wmi_keymap[] = {
         { KE_KEY, 0x8A, { KEY_PROG1 } },
         { KE_KEY, 0x95, { KEY_MEDIA } },
         { KE_KEY, 0x99, { KEY_PHONE } },
+        { KE_KEY, 0xA0, { KEY_SWITCHVIDEOMODE } }, /* SDSP HDMI only */
+        { KE_KEY, 0xA1, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + HDMI */
+        { KE_KEY, 0xA2, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + HDMI */
+        { KE_KEY, 0xA3, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + HDMI */
         { KE_KEY, 0xb5, { KEY_CALC } },
         { KE_KEY, 0xc4, { KEY_KBDILLUMUP } },
         { KE_KEY, 0xc5, { KEY_KBDILLUMDOWN } },
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 77aadde5281c..c7a36f6b0580 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -47,6 +47,9 @@
 #include <linux/thermal.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
+#ifdef CONFIG_ACPI_VIDEO
+#include <acpi/video.h>
+#endif
 
 #include "asus-wmi.h"
 
@@ -136,6 +139,9 @@ MODULE_LICENSE("GPL");
 /* Power */
 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
 
+/* Deep S3 / Resume on LID open */
+#define ASUS_WMI_DEVID_LID_RESUME       0x00120031
+
 /* DSTS masks */
 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
@@ -1365,6 +1371,7 @@ static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
+ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
 
 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
                            const char *buf, size_t count)
@@ -1390,6 +1397,7 @@ static struct attribute *platform_attributes[] = {
         &dev_attr_camera.attr,
         &dev_attr_cardr.attr,
         &dev_attr_touchpad.attr,
+        &dev_attr_lid_resume.attr,
         NULL
 };
 
@@ -1408,6 +1416,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
                 devid = ASUS_WMI_DEVID_CARDREADER;
         else if (attr == &dev_attr_touchpad.attr)
                 devid = ASUS_WMI_DEVID_TOUCHPAD;
+        else if (attr == &dev_attr_lid_resume.attr)
+                devid = ASUS_WMI_DEVID_LID_RESUME;
 
         if (devid != -1)
                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
@@ -1467,14 +1477,9 @@ static int asus_wmi_platform_init(struct asus_wmi *asus)
          */
         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
-        else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
+        else
                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
 
-        if (!asus->dsts_id) {
-                pr_err("Can't find DSTS");
-                return -ENODEV;
-        }
-
         /* CWAP allow to define the behavior of the Fn+F2 key,
          * this method doesn't seems to be present on Eee PCs */
         if (asus->driver->quirks->wapf >= 0)
@@ -1681,7 +1686,13 @@ static int asus_wmi_add(struct platform_device *pdev)
         if (err)
                 goto fail_rfkill;
 
+        if (asus->driver->quirks->wmi_backlight_power)
+                acpi_video_dmi_promote_vendor();
         if (!acpi_video_backlight_support()) {
+#ifdef CONFIG_ACPI_VIDEO
+                pr_info("Disabling ACPI video driver\n");
+                acpi_video_unregister();
+#endif
                 err = asus_wmi_backlight_init(asus);
                 if (err && err != -ENODEV)
                         goto fail_backlight;
diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
index d43b66742004..9c1da8b81bea 100644
--- a/drivers/platform/x86/asus-wmi.h
+++ b/drivers/platform/x86/asus-wmi.h
@@ -39,6 +39,7 @@ struct quirk_entry {
         bool hotplug_wireless;
         bool scalar_panel_brightness;
         bool store_backlight_power;
+        bool wmi_backlight_power;
         int wapf;
 };
 
diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c
index e2230a2b2f8e..2ca7dd1ab3e4 100644
--- a/drivers/platform/x86/classmate-laptop.c
+++ b/drivers/platform/x86/classmate-laptop.c
@@ -31,15 +31,21 @@ MODULE_LICENSE("GPL");
 
 struct cmpc_accel {
         int sensitivity;
+        int g_select;
+        int inputdev_state;
 };
 
-#define CMPC_ACCEL_SENSITIVITY_DEFAULT          5
+#define CMPC_ACCEL_DEV_STATE_CLOSED     0
+#define CMPC_ACCEL_DEV_STATE_OPEN       1
 
+#define CMPC_ACCEL_SENSITIVITY_DEFAULT          5
+#define CMPC_ACCEL_G_SELECT_DEFAULT             0
 
 #define CMPC_ACCEL_HID          "ACCE0000"
+#define CMPC_ACCEL_HID_V4       "ACCE0001"
 #define CMPC_TABLET_HID         "TBLT0000"
 #define CMPC_IPML_HID   "IPML200"
-#define CMPC_KEYS_HID           "FnBT0000"
+#define CMPC_KEYS_HID           "FNBT0000"
 
 /*
  * Generic input device code.
@@ -76,7 +82,391 @@ static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
 }
 
 /*
- * Accelerometer code.
+ * Accelerometer code for Classmate V4
+ */
+static acpi_status cmpc_start_accel_v4(acpi_handle handle)
+{
+        union acpi_object param[4];
+        struct acpi_object_list input;
+        acpi_status status;
+
+        param[0].type = ACPI_TYPE_INTEGER;
+        param[0].integer.value = 0x3;
+        param[1].type = ACPI_TYPE_INTEGER;
+        param[1].integer.value = 0;
+        param[2].type = ACPI_TYPE_INTEGER;
+        param[2].integer.value = 0;
+        param[3].type = ACPI_TYPE_INTEGER;
+        param[3].integer.value = 0;
+        input.count = 4;
+        input.pointer = param;
+        status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+        return status;
+}
+
+static acpi_status cmpc_stop_accel_v4(acpi_handle handle)
+{
+        union acpi_object param[4];
+        struct acpi_object_list input;
+        acpi_status status;
+
+        param[0].type = ACPI_TYPE_INTEGER;
+        param[0].integer.value = 0x4;
+        param[1].type = ACPI_TYPE_INTEGER;
+        param[1].integer.value = 0;
+        param[2].type = ACPI_TYPE_INTEGER;
+        param[2].integer.value = 0;
+        param[3].type = ACPI_TYPE_INTEGER;
+        param[3].integer.value = 0;
+        input.count = 4;
+        input.pointer = param;
+        status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+        return status;
+}
+
+static acpi_status cmpc_accel_set_sensitivity_v4(acpi_handle handle, int val)
+{
+        union acpi_object param[4];
+        struct acpi_object_list input;
+
+        param[0].type = ACPI_TYPE_INTEGER;
+        param[0].integer.value = 0x02;
+        param[1].type = ACPI_TYPE_INTEGER;
+        param[1].integer.value = val;
+        param[2].type = ACPI_TYPE_INTEGER;
+        param[2].integer.value = 0;
+        param[3].type = ACPI_TYPE_INTEGER;
+        param[3].integer.value = 0;
+        input.count = 4;
+        input.pointer = param;
+        return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_accel_set_g_select_v4(acpi_handle handle, int val)
+{
+        union acpi_object param[4];
+        struct acpi_object_list input;
+
+        param[0].type = ACPI_TYPE_INTEGER;
+        param[0].integer.value = 0x05;
+        param[1].type = ACPI_TYPE_INTEGER;
+        param[1].integer.value = val;
+        param[2].type = ACPI_TYPE_INTEGER;
+        param[2].integer.value = 0;
+        param[3].type = ACPI_TYPE_INTEGER;
+        param[3].integer.value = 0;
+        input.count = 4;
+        input.pointer = param;
+        return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_get_accel_v4(acpi_handle handle,
+                                     int16_t *x,
+                                     int16_t *y,
+                                     int16_t *z)
+{
+        union acpi_object param[4];
+        struct acpi_object_list input;
+        struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+        int16_t *locs;
+        acpi_status status;
+
+        param[0].type = ACPI_TYPE_INTEGER;
+        param[0].integer.value = 0x01;
+        param[1].type = ACPI_TYPE_INTEGER;
+        param[1].integer.value = 0;
+        param[2].type = ACPI_TYPE_INTEGER;
+        param[2].integer.value = 0;
+        param[3].type = ACPI_TYPE_INTEGER;
+        param[3].integer.value = 0;
+        input.count = 4;
+        input.pointer = param;
+        status = acpi_evaluate_object(handle, "ACMD", &input, &output);
+        if (ACPI_SUCCESS(status)) {
+                union acpi_object *obj;
+                obj = output.pointer;
+                locs = (int16_t *) obj->buffer.pointer;
+                *x = locs[0];
+                *y = locs[1];
+                *z = locs[2];
+                kfree(output.pointer);
+        }
+        return status;
+}
+
+static void cmpc_accel_handler_v4(struct acpi_device *dev, u32 event)
+{
+        if (event == 0x81) {
+                int16_t x, y, z;
+                acpi_status status;
+
+                status = cmpc_get_accel_v4(dev->handle, &x, &y, &z);
+                if (ACPI_SUCCESS(status)) {
+                        struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+                        input_report_abs(inputdev, ABS_X, x);
+                        input_report_abs(inputdev, ABS_Y, y);
+                        input_report_abs(inputdev, ABS_Z, z);
+                        input_sync(inputdev);
+                }
+        }
+}
+
+static ssize_t cmpc_accel_sensitivity_show_v4(struct device *dev,
+                                              struct device_attribute *attr,
+                                              char *buf)
+{
+        struct acpi_device *acpi;
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+
+        acpi = to_acpi_device(dev);
+        inputdev = dev_get_drvdata(&acpi->dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        return sprintf(buf, "%d\n", accel->sensitivity);
+}
+
+static ssize_t cmpc_accel_sensitivity_store_v4(struct device *dev,
+                                               struct device_attribute *attr,
+                                               const char *buf, size_t count)
+{
+        struct acpi_device *acpi;
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+        unsigned long sensitivity;
+        int r;
+
+        acpi = to_acpi_device(dev);
+        inputdev = dev_get_drvdata(&acpi->dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        r = kstrtoul(buf, 0, &sensitivity);
+        if (r)
+                return r;
+
+        /* sensitivity must be between 1 and 127 */
+        if (sensitivity < 1 || sensitivity > 127)
+                return -EINVAL;
+
+        accel->sensitivity = sensitivity;
+        cmpc_accel_set_sensitivity_v4(acpi->handle, sensitivity);
+
+        return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_sensitivity_attr_v4 = {
+        .attr = { .name = "sensitivity", .mode = 0660 },
+        .show = cmpc_accel_sensitivity_show_v4,
+        .store = cmpc_accel_sensitivity_store_v4
+};
+
+static ssize_t cmpc_accel_g_select_show_v4(struct device *dev,
+                                           struct device_attribute *attr,
+                                           char *buf)
+{
+        struct acpi_device *acpi;
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+
+        acpi = to_acpi_device(dev);
+        inputdev = dev_get_drvdata(&acpi->dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        return sprintf(buf, "%d\n", accel->g_select);
+}
+
+static ssize_t cmpc_accel_g_select_store_v4(struct device *dev,
+                                            struct device_attribute *attr,
+                                            const char *buf, size_t count)
+{
+        struct acpi_device *acpi;
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+        unsigned long g_select;
+        int r;
+
+        acpi = to_acpi_device(dev);
+        inputdev = dev_get_drvdata(&acpi->dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        r = kstrtoul(buf, 0, &g_select);
+        if (r)
+                return r;
+
+        /* 0 means 1.5g, 1 means 6g, everything else is wrong */
+        if (g_select != 0 && g_select != 1)
+                return -EINVAL;
+
+        accel->g_select = g_select;
+        cmpc_accel_set_g_select_v4(acpi->handle, g_select);
+
+        return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_g_select_attr_v4 = {
+        .attr = { .name = "g_select", .mode = 0660 },
+        .show = cmpc_accel_g_select_show_v4,
+        .store = cmpc_accel_g_select_store_v4
+};
+
+static int cmpc_accel_open_v4(struct input_dev *input)
+{
+        struct acpi_device *acpi;
+        struct cmpc_accel *accel;
+
+        acpi = to_acpi_device(input->dev.parent);
+        accel = dev_get_drvdata(&input->dev);
+
+        cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
+        cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
+
+        if (ACPI_SUCCESS(cmpc_start_accel_v4(acpi->handle))) {
+                accel->inputdev_state = CMPC_ACCEL_DEV_STATE_OPEN;
+                return 0;
+        }
+        return -EIO;
+}
+
+static void cmpc_accel_close_v4(struct input_dev *input)
+{
+        struct acpi_device *acpi;
+        struct cmpc_accel *accel;
+
+        acpi = to_acpi_device(input->dev.parent);
+        accel = dev_get_drvdata(&input->dev);
+
+        cmpc_stop_accel_v4(acpi->handle);
+        accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
+}
+
+static void cmpc_accel_idev_init_v4(struct input_dev *inputdev)
+{
+        set_bit(EV_ABS, inputdev->evbit);
+        input_set_abs_params(inputdev, ABS_X, -255, 255, 16, 0);
+        input_set_abs_params(inputdev, ABS_Y, -255, 255, 16, 0);
+        input_set_abs_params(inputdev, ABS_Z, -255, 255, 16, 0);
+        inputdev->open = cmpc_accel_open_v4;
+        inputdev->close = cmpc_accel_close_v4;
+}
+
+static int cmpc_accel_suspend_v4(struct device *dev)
+{
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+
+        inputdev = dev_get_drvdata(dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN)
+                return cmpc_stop_accel_v4(to_acpi_device(dev)->handle);
+
+        return 0;
+}
+
+static int cmpc_accel_resume_v4(struct device *dev)
+{
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+
+        inputdev = dev_get_drvdata(dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN) {
+                cmpc_accel_set_sensitivity_v4(to_acpi_device(dev)->handle,
+                                              accel->sensitivity);
+                cmpc_accel_set_g_select_v4(to_acpi_device(dev)->handle,
+                                           accel->g_select);
+
+                if (ACPI_FAILURE(cmpc_start_accel_v4(to_acpi_device(dev)->handle)))
+                        return -EIO;
+        }
+
+        return 0;
+}
+
+static int cmpc_accel_add_v4(struct acpi_device *acpi)
+{
+        int error;
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+
+        accel = kmalloc(sizeof(*accel), GFP_KERNEL);
+        if (!accel)
+                return -ENOMEM;
+
+        accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
+
+        accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
+        cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
+
+        error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+        if (error)
+                goto failed_sensitivity;
+
+        accel->g_select = CMPC_ACCEL_G_SELECT_DEFAULT;
+        cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
+
+        error = device_create_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+        if (error)
+                goto failed_g_select;
+
+        error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel_v4",
+                                            cmpc_accel_idev_init_v4);
+        if (error)
+                goto failed_input;
+
+        inputdev = dev_get_drvdata(&acpi->dev);
+        dev_set_drvdata(&inputdev->dev, accel);
+
+        return 0;
+
+failed_input:
+        device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+failed_g_select:
+        device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+failed_sensitivity:
+        kfree(accel);
+        return error;
+}
+
+static int cmpc_accel_remove_v4(struct acpi_device *acpi, int type)
+{
+        struct input_dev *inputdev;
+        struct cmpc_accel *accel;
+
+        inputdev = dev_get_drvdata(&acpi->dev);
+        accel = dev_get_drvdata(&inputdev->dev);
+
+        device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+        device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+        return cmpc_remove_acpi_notify_device(acpi);
+}
+
+static SIMPLE_DEV_PM_OPS(cmpc_accel_pm, cmpc_accel_suspend_v4,
+                         cmpc_accel_resume_v4);
+
+static const struct acpi_device_id cmpc_accel_device_ids_v4[] = {
+        {CMPC_ACCEL_HID_V4, 0},
+        {"", 0}
+};
+
+static struct acpi_driver cmpc_accel_acpi_driver_v4 = {
+        .owner = THIS_MODULE,
+        .name = "cmpc_accel_v4",
+        .class = "cmpc_accel_v4",
+        .ids = cmpc_accel_device_ids_v4,
+        .ops = {
+                .add = cmpc_accel_add_v4,
+                .remove = cmpc_accel_remove_v4,
+                .notify = cmpc_accel_handler_v4,
+        },
+        .drv.pm = &cmpc_accel_pm,
+};
+
+
+/*
+ * Accelerometer code for Classmate versions prior to V4
  */
 static acpi_status cmpc_start_accel(acpi_handle handle)
 {
@@ -726,8 +1116,15 @@ static int cmpc_init(void)
         if (r)
                 goto failed_accel;
 
+        r = acpi_bus_register_driver(&cmpc_accel_acpi_driver_v4);
+        if (r)
+                goto failed_accel_v4;
+
         return r;
 
+failed_accel_v4:
+        acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
+
 failed_accel:
         acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
 
@@ -743,6 +1140,7 @@ failed_keys:
 
 static void cmpc_exit(void)
 {
+        acpi_bus_unregister_driver(&cmpc_accel_acpi_driver_v4);
         acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
         acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
         acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
@@ -754,6 +1152,7 @@ module_exit(cmpc_exit);
 
 static const struct acpi_device_id cmpc_device_ids[] = {
         {CMPC_ACCEL_HID, 0},
+        {CMPC_ACCEL_HID_V4, 0},
         {CMPC_TABLET_HID, 0},
         {CMPC_IPML_HID, 0},
         {CMPC_KEYS_HID, 0},
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 5f78aac9b163..4e96e8c0b60f 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -206,6 +206,60 @@ static struct dmi_system_id __devinitdata dell_quirks[] = {
                 },
                 .driver_data = &quirk_dell_vostro_v130,
         },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Inspiron 5420",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Isnpiron 5420"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Inspiron 5520",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Isnpiron 5520"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Inspiron 5720",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Isnpiron 5720"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Inspiron 7420",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Isnpiron 7420"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Inspiron 7520",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Isnpiron 7520"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "Dell Inspiron 7720",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Isnpiron 7720"),
+                },
+                .driver_data = &quirk_dell_vostro_v130,
+        },
         { }
 };
 
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
index 656761380342..5838332ea5bd 100644
--- a/drivers/platform/x86/eeepc-wmi.c
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -79,7 +79,7 @@ static const struct key_entry eeepc_wmi_keymap[] = {
         { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
         { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
         { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
-        { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } },
+        { KE_KEY, 0xe9, { KEY_DISPLAYTOGGLE } },
         { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
         { KE_KEY, 0xec, { KEY_CAMERA_UP } },
         { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
@@ -107,6 +107,11 @@ static struct quirk_entry quirk_asus_et2012_type3 = {
         .store_backlight_power = true,
 };
 
+static struct quirk_entry quirk_asus_x101ch = {
+        /* We need this when ACPI function doesn't do this well */
+        .wmi_backlight_power = true,
+};
+
 static struct quirk_entry *quirks;
 
 static void et2012_quirks(void)
@@ -157,6 +162,24 @@ static struct dmi_system_id asus_quirks[] = {
                 },
                 .driver_data = &quirk_asus_unknown,
         },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK Computer INC. X101CH",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
+                },
+                .driver_data = &quirk_asus_x101ch,
+        },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK Computer INC. 1015CX",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
+                },
+                .driver_data = &quirk_asus_x101ch,
+        },
         {},
 };
 
diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index e2a34b42ddc1..c1ca7bcebb66 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -26,7 +26,7 @@
 #include <linux/seq_file.h>
 #include <linux/debugfs.h>
 #include <linux/ctype.h>
-#if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
+#ifdef CONFIG_ACPI_VIDEO
 #include <acpi/video.h>
 #endif
 
@@ -1465,6 +1465,15 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
                         DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
                 },
         },
+        /* DMI ids for laptops with bad Chassis Type */
+        {
+          .ident = "R40/R41",
+          .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "R40/R41"),
+                DMI_MATCH(DMI_BOARD_NAME, "R40/R41"),
+                },
+        },
         /* Specific DMI ids for laptop with quirks */
         {
          .callback = samsung_dmi_matched,
@@ -1506,6 +1515,16 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
                 },
          .driver_data = &samsung_broken_acpi_video,
         },
+        {
+         .callback = samsung_dmi_matched,
+         .ident = "X360",
+         .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
+                DMI_MATCH(DMI_BOARD_NAME, "X360"),
+                },
+         .driver_data = &samsung_broken_acpi_video,
+        },
         { },
 };
 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
@@ -1530,15 +1549,18 @@ static int __init samsung_init(void)
         samsung->quirks = quirks;
 
 
-#if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
+#ifdef CONFIG_ACPI
+        if (samsung->quirks->broken_acpi_video)
+                acpi_video_dmi_promote_vendor();
+
         /* Don't handle backlight here if the acpi video already handle it */
         if (acpi_video_backlight_support()) {
-                if (samsung->quirks->broken_acpi_video) {
-                        pr_info("Disabling ACPI video driver\n");
-                        acpi_video_unregister();
-                } else {
-                        samsung->handle_backlight = false;
-                }
+                samsung->handle_backlight = false;
+        } else if (samsung->quirks->broken_acpi_video) {
+                pr_info("Disabling ACPI video driver\n");
+#ifdef CONFIG_ACPI_VIDEO
+                acpi_video_unregister();
+#endif
         }
 #endif
 
@@ -1552,8 +1574,7 @@ static int __init samsung_init(void)
 
 #ifdef CONFIG_ACPI
         /* Only log that if we are really on a sabi platform */
-        if (acpi_video_backlight_support() &&
-            !samsung->quirks->broken_acpi_video)
+        if (acpi_video_backlight_support())
                 pr_info("Backlight controlled by ACPI video driver\n");
 #endif
 
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d5fd4a1193f8..e7f73287636c 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3015,8 +3015,6 @@ static void hotkey_exit(void)
         if (hotkey_dev_attributes)
                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
 
-        kfree(hotkey_keycode_map);
-
         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
                    "restoring original HKEY status and mask\n");
         /* yes, there is a bitwise or below, we want the
@@ -5217,6 +5215,7 @@ static void led_exit(void)
                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
         }
 
+        flush_workqueue(tpacpi_wq);
         kfree(tpacpi_leds);
 }
 
@@ -8936,6 +8935,7 @@ static void thinkpad_acpi_module_exit(void)
                         input_unregister_device(tpacpi_inputdev);
                 else
                         input_free_device(tpacpi_inputdev);
+                kfree(hotkey_keycode_map);
         }
 
         if (tpacpi_hwmon)
@@ -8969,6 +8969,7 @@ static void thinkpad_acpi_module_exit(void)
         kfree(thinkpad_id.bios_version_str);
         kfree(thinkpad_id.ec_version_str);
         kfree(thinkpad_id.model_str);
+        kfree(thinkpad_id.nummodel_str);
 }