Merge tag 'v3.16-rc6' into next

Merge with mainline to bring in changes to MFD to allow merging
ipaq-micro-ts driver.

18 files changed, 508 insertions, 85 deletions

diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c
index 4f5aa831f549..d9a09d9637d9 100644
--- a/drivers/platform/goldfish/goldfish_pipe.c
+++ b/drivers/platform/goldfish/goldfish_pipe.c
@@ -56,6 +56,7 @@
 #include <linux/bitops.h>
 #include <linux/slab.h>
 #include <linux/io.h>
+#include <linux/goldfish.h>
 
 /*
  * IMPORTANT: The following constants must match the ones used and defined
@@ -66,8 +67,10 @@
 #define PIPE_REG_COMMAND		0x00  /* write: value = command */
 #define PIPE_REG_STATUS			0x04  /* read */
 #define PIPE_REG_CHANNEL		0x08  /* read/write: channel id */
+#define PIPE_REG_CHANNEL_HIGH	        0x30  /* read/write: channel id */
 #define PIPE_REG_SIZE			0x0c  /* read/write: buffer size */
 #define PIPE_REG_ADDRESS		0x10  /* write: physical address */
+#define PIPE_REG_ADDRESS_HIGH	        0x34  /* write: physical address */
 #define PIPE_REG_WAKES			0x14  /* read: wake flags */
 #define PIPE_REG_PARAMS_ADDR_LOW	0x18  /* read/write: batch data address */
 #define PIPE_REG_PARAMS_ADDR_HIGH	0x1c  /* read/write: batch data address */
@@ -109,9 +112,9 @@
 #define PIPE_WAKE_WRITE        (1 << 2)  /* pipe can now be written to */
 
 struct access_params {
-	u32 channel;
+	unsigned long channel;
 	u32 size;
-	u32 address;
+	unsigned long address;
 	u32 cmd;
 	u32 result;
 	/* reserved for future extension */
@@ -149,13 +152,14 @@ enum {
 
 
 static u32 goldfish_cmd_status(struct goldfish_pipe *pipe, u32 cmd)
-{ 
+{
 	unsigned long flags;
 	u32 status;
 	struct goldfish_pipe_dev *dev = pipe->dev;
 
 	spin_lock_irqsave(&dev->lock, flags);
-	writel((u32)pipe, dev->base + PIPE_REG_CHANNEL);
+	gf_write64((u64)(unsigned long)pipe, dev->base + PIPE_REG_CHANNEL,
+				dev->base + PIPE_REG_CHANNEL_HIGH);
 	writel(cmd, dev->base + PIPE_REG_COMMAND);
 	status = readl(dev->base + PIPE_REG_STATUS);
 	spin_unlock_irqrestore(&dev->lock, flags);
@@ -163,12 +167,13 @@ static u32 goldfish_cmd_status(struct goldfish_pipe *pipe, u32 cmd)
 }
 
 static void goldfish_cmd(struct goldfish_pipe *pipe, u32 cmd)
-{ 
+{
 	unsigned long flags;
 	struct goldfish_pipe_dev *dev = pipe->dev;
 
 	spin_lock_irqsave(&dev->lock, flags);
-	writel((u32)pipe, dev->base + PIPE_REG_CHANNEL);
+	gf_write64((u64)(unsigned long)pipe, dev->base + PIPE_REG_CHANNEL,
+				dev->base + PIPE_REG_CHANNEL_HIGH);
 	writel(cmd, dev->base + PIPE_REG_COMMAND);
 	spin_unlock_irqrestore(&dev->lock, flags);
 }
@@ -322,9 +327,12 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
 		spin_lock_irqsave(&dev->lock, irq_flags);
 		if (access_with_param(dev, CMD_WRITE_BUFFER + cmd_offset,
 				address, avail, pipe, &status)) {
-			writel((u32)pipe, dev->base + PIPE_REG_CHANNEL);
+			gf_write64((u64)(unsigned long)pipe,
+				   dev->base + PIPE_REG_CHANNEL,
+				   dev->base + PIPE_REG_CHANNEL_HIGH);
 			writel(avail, dev->base + PIPE_REG_SIZE);
-			writel(address, dev->base + PIPE_REG_ADDRESS);
+			gf_write64(address, dev->base + PIPE_REG_ADDRESS,
+				dev->base + PIPE_REG_ADDRESS_HIGH);
 			writel(CMD_WRITE_BUFFER + cmd_offset,
 					dev->base + PIPE_REG_COMMAND);
 			status = readl(dev->base + PIPE_REG_STATUS);
@@ -447,7 +455,15 @@ static irqreturn_t goldfish_pipe_interrupt(int irq, void *dev_id)
 		/* First read the channel, 0 means the end of the list */
 		struct goldfish_pipe *pipe;
 		unsigned long wakes;
-		unsigned long channel = readl(dev->base + PIPE_REG_CHANNEL);
+		unsigned long channel = 0;
+
+#ifdef CONFIG_64BIT
+		channel = (u64)readl(dev->base + PIPE_REG_CHANNEL_HIGH) << 32;
+
+		if (channel == 0)
+			break;
+#endif
+		channel |= readl(dev->base + PIPE_REG_CHANNEL);
 
 		if (channel == 0)
 			break;
diff --git a/drivers/platform/goldfish/pdev_bus.c b/drivers/platform/goldfish/pdev_bus.c
index 92cc4cfafde5..8c43589c3edb 100644
--- a/drivers/platform/goldfish/pdev_bus.c
+++ b/drivers/platform/goldfish/pdev_bus.c
@@ -36,6 +36,7 @@
 #define PDEV_BUS_IO_SIZE        (0x14)
 #define PDEV_BUS_IRQ            (0x18)
 #define PDEV_BUS_IRQ_COUNT      (0x1c)
+#define PDEV_BUS_GET_NAME_HIGH  (0x20)
 
 struct pdev_bus_dev {
 	struct list_head list;
@@ -129,7 +130,10 @@ static int goldfish_new_pdev(void)
 	dev->pdev.dev.dma_mask = (void *)(dev->pdev.name + name_len + 1);
 	*dev->pdev.dev.dma_mask = ~0;
 
-	writel((unsigned long)name, pdev_bus_base + PDEV_BUS_GET_NAME);
+#ifdef CONFIG_64BIT
+	writel((u32)((u64)name>>32), pdev_bus_base + PDEV_BUS_GET_NAME_HIGH);
+#endif
+	writel((u32)(unsigned long)name, pdev_bus_base + PDEV_BUS_GET_NAME);
 	name[name_len] = '\0';
 	dev->pdev.id = readl(pdev_bus_base + PDEV_BUS_ID);
 	dev->pdev.resource[0].start = base;
@@ -184,11 +188,6 @@ static int goldfish_pdev_bus_probe(struct platform_device *pdev)
 	pdev_bus_addr = r->start;
 	pdev_bus_len = resource_size(r);
 
-	if (request_mem_region(pdev_bus_addr, pdev_bus_len, "goldfish")) {
-		dev_err(&pdev->dev, "unable to reserve Goldfish MMIO.\n");
-		return -EBUSY;
-	}
-
 	pdev_bus_base = ioremap(pdev_bus_addr, pdev_bus_len);
 	if (pdev_bus_base == NULL) {
 		ret = -ENOMEM;
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 27df2c533b09..172f26ce59ac 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -102,7 +102,7 @@ config DELL_LAPTOP
 	default n
 	---help---
 	This driver adds support for rfkill and backlight control to Dell
-	laptops.
+	laptops (except for some models covered by the Compal driver).
 
 config DELL_WMI
 	tristate "Dell WMI extras"
@@ -127,6 +127,16 @@ config DELL_WMI_AIO
 	  To compile this driver as a module, choose M here: the module will
 	  be called dell-wmi-aio.
 
+config DELL_SMO8800
+	tristate "Dell Latitude freefall driver (ACPI SMO8800/SMO8810)"
+	depends on ACPI
+	---help---
+	  Say Y here if you want to support SMO8800/SMO8810 freefall device
+	  on Dell Latitude laptops.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called dell-smo8800.
+
 
 config FUJITSU_LAPTOP
 	tristate "Fujitsu Laptop Extras"
@@ -265,23 +275,21 @@ config PANASONIC_LAPTOP
 	  R2, R3, R5, T2, W2 and Y2 series), say Y.
 
 config COMPAL_LAPTOP
-	tristate "Compal Laptop Extras"
+	tristate "Compal (and others) Laptop Extras"
 	depends on ACPI
 	depends on BACKLIGHT_CLASS_DEVICE
 	depends on RFKILL
 	depends on HWMON
 	depends on POWER_SUPPLY
 	---help---
-	  This is a driver for laptops built by Compal:
-
-	  Compal FL90/IFL90
-	  Compal FL91/IFL91
-	  Compal FL92/JFL92
-	  Compal FT00/IFT00
+	  This is a driver for laptops built by Compal, and some models by
+	  other brands (e.g. Dell, Toshiba).
 
-	  It adds support for Bluetooth, WLAN and LCD brightness control.
+	  It adds support for rfkill, Bluetooth, WLAN and LCD brightness
+	  control.
 
-	  If you have an Compal FL9x/IFL9x/FT00 laptop, say Y or M here.
+	  For a (possibly incomplete) list of supported laptops, please refer
+	  to: Documentation/platform/x86-laptop-drivers.txt
 
 config SONY_LAPTOP
 	tristate "Sony Laptop Extras"
@@ -724,7 +732,7 @@ config IBM_RTL
 
 config XO1_RFKILL
 	tristate "OLPC XO-1 software RF kill switch"
-	depends on OLPC
+	depends on OLPC || COMPILE_TEST
 	depends on RFKILL
 	---help---
 	  Support for enabling/disabling the WLAN interface on the OLPC XO-1
@@ -732,6 +740,7 @@ config XO1_RFKILL
 
 config XO15_EBOOK
 	tristate "OLPC XO-1.5 ebook switch"
+	depends on OLPC || COMPILE_TEST
 	depends on ACPI && INPUT
 	---help---
 	  Support for the ebook switch on the OLPC XO-1.5 laptop.
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 1a2eafc9d48e..c4ca428fd3db 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_COMPAL_LAPTOP)	+= compal-laptop.o
 obj-$(CONFIG_DELL_LAPTOP)	+= dell-laptop.o
 obj-$(CONFIG_DELL_WMI)		+= dell-wmi.o
 obj-$(CONFIG_DELL_WMI_AIO)	+= dell-wmi-aio.o
+obj-$(CONFIG_DELL_SMO8800)	+= dell-smo8800.o
 obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o
 obj-$(CONFIG_ACERHDF)		+= acerhdf.o
 obj-$(CONFIG_HP_ACCEL)		+= hp_accel.o
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index c91f69b39db4..bbf78b2d6d93 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -570,6 +570,14 @@ static const struct dmi_system_id video_vendor_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
 		},
 	},
+	{
+		.callback = video_set_backlight_video_vendor,
+		.ident = "Acer Aspire 5741",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
+		},
+	},
 	{}
 };
 
@@ -2228,7 +2236,7 @@ static int __init acer_wmi_init(void)
 		pr_info("Brightness must be controlled by acpi video driver\n");
 	} else {
 		pr_info("Disabling ACPI video driver\n");
-		acpi_video_unregister();
+		acpi_video_unregister_backlight();
 	}
 
 	if (wmi_has_guid(WMID_GUID3)) {
diff --git a/drivers/platform/x86/alienware-wmi.c b/drivers/platform/x86/alienware-wmi.c
index 541f9514f76f..297b6640213f 100644
--- a/drivers/platform/x86/alienware-wmi.c
+++ b/drivers/platform/x86/alienware-wmi.c
@@ -32,6 +32,7 @@
 #define WMAX_METHOD_HDMI_STATUS		0x2
 #define WMAX_METHOD_BRIGHTNESS		0x3
 #define WMAX_METHOD_ZONE_CONTROL	0x4
+#define WMAX_METHOD_HDMI_CABLE		0x5
 
 MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
 MODULE_DESCRIPTION("Alienware special feature control");
@@ -350,12 +351,11 @@ static int alienware_zone_init(struct platform_device *dev)
 	char *name;
 
 	if (interface == WMAX) {
-		global_led.max_brightness = 100;
 		lighting_control_state = WMAX_RUNNING;
 	} else if (interface == LEGACY) {
-		global_led.max_brightness = 0x0F;
 		lighting_control_state = LEGACY_RUNNING;
 	}
+	global_led.max_brightness = 0x0F;
 	global_brightness = global_led.max_brightness;
 
 	/*
@@ -423,41 +423,85 @@ static void alienware_zone_exit(struct platform_device *dev)
 	The HDMI mux sysfs node indicates the status of the HDMI input mux.
 	It can toggle between standard system GPU output and HDMI input.
 */
-static ssize_t show_hdmi(struct device *dev, struct device_attribute *attr,
-			 char *buf)
+static acpi_status alienware_hdmi_command(struct hdmi_args *in_args,
+					  u32 command, int *out_data)
 {
 	acpi_status status;
-	struct acpi_buffer input;
 	union acpi_object *obj;
-	u32 tmp = 0;
-	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_buffer input;
+	struct acpi_buffer output;
+
+	input.length = (acpi_size) sizeof(*in_args);
+	input.pointer = in_args;
+	if (out_data != NULL) {
+		output.length = ACPI_ALLOCATE_BUFFER;
+		output.pointer = NULL;
+		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+					     command, &input, &output);
+	} else
+		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+					     command, &input, NULL);
+
+	if (ACPI_SUCCESS(status) && out_data != NULL) {
+		obj = (union acpi_object *)output.pointer;
+		if (obj && obj->type == ACPI_TYPE_INTEGER)
+			*out_data = (u32) obj->integer.value;
+	}
+	return status;
+
+}
+
+static ssize_t show_hdmi_cable(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	acpi_status status;
+	u32 out_data;
 	struct hdmi_args in_args = {
 		.arg = 0,
 	};
-	input.length = (acpi_size) sizeof(in_args);
-	input.pointer = &in_args;
-	status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
-				     WMAX_METHOD_HDMI_STATUS, &input, &output);
+	status =
+	    alienware_hdmi_command(&in_args, WMAX_METHOD_HDMI_CABLE,
+				   (u32 *) &out_data);
+	if (ACPI_SUCCESS(status)) {
+		if (out_data == 0)
+			return scnprintf(buf, PAGE_SIZE,
+					 "[unconnected] connected unknown\n");
+		else if (out_data == 1)
+			return scnprintf(buf, PAGE_SIZE,
+					 "unconnected [connected] unknown\n");
+	}
+	pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
+	return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
+}
+
+static ssize_t show_hdmi_source(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	acpi_status status;
+	u32 out_data;
+	struct hdmi_args in_args = {
+		.arg = 0,
+	};
+	status =
+	    alienware_hdmi_command(&in_args, WMAX_METHOD_HDMI_STATUS,
+				   (u32 *) &out_data);
 
 	if (ACPI_SUCCESS(status)) {
-		obj = (union acpi_object *)output.pointer;
-		if (obj && obj->type == ACPI_TYPE_INTEGER)
-			tmp = (u32) obj->integer.value;
-		if (tmp == 1)
+		if (out_data == 1)
 			return scnprintf(buf, PAGE_SIZE,
 					 "[input] gpu unknown\n");
-		else if (tmp == 2)
+		else if (out_data == 2)
 			return scnprintf(buf, PAGE_SIZE,
 					 "input [gpu] unknown\n");
 	}
-	pr_err("alienware-wmi: unknown HDMI status: %d\n", status);
+	pr_err("alienware-wmi: unknown HDMI source status: %d\n", out_data);
 	return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
 }
 
-static ssize_t toggle_hdmi(struct device *dev, struct device_attribute *attr,
-			   const char *buf, size_t count)
+static ssize_t toggle_hdmi_source(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
 {
-	struct acpi_buffer input;
 	acpi_status status;
 	struct hdmi_args args;
 	if (strcmp(buf, "gpu\n") == 0)
@@ -467,33 +511,46 @@ static ssize_t toggle_hdmi(struct device *dev, struct device_attribute *attr,
 	else
 		args.arg = 3;
 	pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
-	input.length = (acpi_size) sizeof(args);
-	input.pointer = &args;
-	status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
-				     WMAX_METHOD_HDMI_SOURCE, &input, NULL);
+
+	status = alienware_hdmi_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
+
 	if (ACPI_FAILURE(status))
 		pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
 		       status);
 	return count;
 }
 
-static DEVICE_ATTR(hdmi, S_IRUGO | S_IWUSR, show_hdmi, toggle_hdmi);
+static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
+static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
+		   toggle_hdmi_source);
+
+static struct attribute *hdmi_attrs[] = {
+	&dev_attr_cable.attr,
+	&dev_attr_source.attr,
+	NULL,
+};
 
-static void remove_hdmi(struct platform_device *device)
+static struct attribute_group hdmi_attribute_group = {
+	.name = "hdmi",
+	.attrs = hdmi_attrs,
+};
+
+static void remove_hdmi(struct platform_device *dev)
 {
-	device_remove_file(&device->dev, &dev_attr_hdmi);
+	sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
 }
 
-static int create_hdmi(void)
+static int create_hdmi(struct platform_device *dev)
 {
-	int ret = -ENOMEM;
-	ret = device_create_file(&platform_device->dev, &dev_attr_hdmi);
+	int ret;
+
+	ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
 	if (ret)
 		goto error_create_hdmi;
 	return 0;
 
 error_create_hdmi:
-	remove_hdmi(platform_device);
+	remove_hdmi(dev);
 	return ret;
 }
 
@@ -527,7 +584,7 @@ static int __init alienware_wmi_init(void)
 		goto fail_platform_device2;
 
 	if (interface == WMAX) {
-		ret = create_hdmi();
+		ret = create_hdmi(platform_device);
 		if (ret)
 			goto fail_prep_hdmi;
 	}
diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index 563f59efa669..ddf0eefd862c 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -137,6 +137,15 @@ static struct dmi_system_id asus_quirks[] = {
 	},
 	{
 		.callback = dmi_matched,
+		.ident = "ASUSTeK COMPUTER INC. X550CA",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "X550CA"),
+		},
+		.driver_data = &quirk_asus_x401u,
+	},
+	{
+		.callback = dmi_matched,
 		.ident = "ASUSTeK COMPUTER INC. X55A",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index c5e082fb82fa..3c6ccedc82b6 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -266,7 +266,7 @@ static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 	acpi_status status;
 	union acpi_object *obj;
-	u32 tmp;
+	u32 tmp = 0;
 
 	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
 				     &input, &output);
@@ -277,8 +277,6 @@ static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 	obj = (union acpi_object *)output.pointer;
 	if (obj && obj->type == ACPI_TYPE_INTEGER)
 		tmp = (u32) obj->integer.value;
-	else
-		tmp = 0;
 
 	if (retval)
 		*retval = tmp;
@@ -642,8 +640,7 @@ static void asus_rfkill_hotplug(struct asus_wmi *asus)
 			dev = pci_scan_single_device(bus, 0);
 			if (dev) {
 				pci_bus_assign_resources(bus);
-				if (pci_bus_add_device(dev))
-					pr_err("Unable to hotplug wifi\n");
+				pci_bus_add_device(dev);
 			}
 		} else {
 			dev = pci_get_slot(bus, 0);
diff --git a/drivers/platform/x86/dell-smo8800.c b/drivers/platform/x86/dell-smo8800.c
new file mode 100644
index 000000000000..a653716055d1
--- /dev/null
+++ b/drivers/platform/x86/dell-smo8800.c
@@ -0,0 +1,233 @@
+/*
+ *  dell-smo8800.c - Dell Latitude ACPI SMO8800/SMO8810 freefall sensor driver
+ *
+ *  Copyright (C) 2012 Sonal Santan <sonal.santan@gmail.com>
+ *  Copyright (C) 2014 Pali Rohár <pali.rohar@gmail.com>
+ *
+ *  This is loosely based on lis3lv02d driver.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+#define DRIVER_NAME "smo8800"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+
+struct smo8800_device {
+	u32 irq;                     /* acpi device irq */
+	atomic_t counter;            /* count after last read */
+	struct miscdevice miscdev;   /* for /dev/freefall */
+	unsigned long misc_opened;   /* whether the device is open */
+	wait_queue_head_t misc_wait; /* Wait queue for the misc dev */
+	struct device *dev;          /* acpi device */
+};
+
+static irqreturn_t smo8800_interrupt_quick(int irq, void *data)
+{
+	struct smo8800_device *smo8800 = data;
+
+	atomic_inc(&smo8800->counter);
+	wake_up_interruptible(&smo8800->misc_wait);
+	return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t smo8800_interrupt_thread(int irq, void *data)
+{
+	struct smo8800_device *smo8800 = data;
+
+	dev_info(smo8800->dev, "detected free fall\n");
+	return IRQ_HANDLED;
+}
+
+static acpi_status smo8800_get_resource(struct acpi_resource *resource,
+					void *context)
+{
+	struct acpi_resource_extended_irq *irq;
+
+	if (resource->type != ACPI_RESOURCE_TYPE_EXTENDED_IRQ)
+		return AE_OK;
+
+	irq = &resource->data.extended_irq;
+	if (!irq || !irq->interrupt_count)
+		return AE_OK;
+
+	*((u32 *)context) = irq->interrupts[0];
+	return AE_CTRL_TERMINATE;
+}
+
+static u32 smo8800_get_irq(struct acpi_device *device)
+{
+	u32 irq = 0;
+	acpi_status status;
+
+	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+				     smo8800_get_resource, &irq);
+	if (ACPI_FAILURE(status)) {
+		dev_err(&device->dev, "acpi_walk_resources failed\n");
+		return 0;
+	}
+
+	return irq;
+}
+
+static ssize_t smo8800_misc_read(struct file *file, char __user *buf,
+				 size_t count, loff_t *pos)
+{
+	struct smo8800_device *smo8800 = container_of(file->private_data,
+					 struct smo8800_device, miscdev);
+
+	u32 data = 0;
+	unsigned char byte_data = 0;
+	ssize_t retval = 1;
+
+	if (count < 1)
+		return -EINVAL;
+
+	atomic_set(&smo8800->counter, 0);
+	retval = wait_event_interruptible(smo8800->misc_wait,
+				(data = atomic_xchg(&smo8800->counter, 0)));
+
+	if (retval)
+		return retval;
+
+	byte_data = 1;
+	retval = 1;
+
+	if (data < 255)
+		byte_data = data;
+	else
+		byte_data = 255;
+
+	if (put_user(byte_data, buf))
+		retval = -EFAULT;
+
+	return retval;
+}
+
+static int smo8800_misc_open(struct inode *inode, struct file *file)
+{
+	struct smo8800_device *smo8800 = container_of(file->private_data,
+					 struct smo8800_device, miscdev);
+
+	if (test_and_set_bit(0, &smo8800->misc_opened))
+		return -EBUSY; /* already open */
+
+	atomic_set(&smo8800->counter, 0);
+	return 0;
+}
+
+static int smo8800_misc_release(struct inode *inode, struct file *file)
+{
+	struct smo8800_device *smo8800 = container_of(file->private_data,
+					 struct smo8800_device, miscdev);
+
+	clear_bit(0, &smo8800->misc_opened); /* release the device */
+	return 0;
+}
+
+static const struct file_operations smo8800_misc_fops = {
+	.owner = THIS_MODULE,
+	.read = smo8800_misc_read,
+	.open = smo8800_misc_open,
+	.release = smo8800_misc_release,
+};
+
+static int smo8800_add(struct acpi_device *device)
+{
+	int err;
+	struct smo8800_device *smo8800;
+
+	smo8800 = devm_kzalloc(&device->dev, sizeof(*smo8800), GFP_KERNEL);
+	if (!smo8800) {
+		dev_err(&device->dev, "failed to allocate device data\n");
+		return -ENOMEM;
+	}
+
+	smo8800->dev = &device->dev;
+	smo8800->miscdev.minor = MISC_DYNAMIC_MINOR;
+	smo8800->miscdev.name = "freefall";
+	smo8800->miscdev.fops = &smo8800_misc_fops;
+
+	init_waitqueue_head(&smo8800->misc_wait);
+
+	err = misc_register(&smo8800->miscdev);
+	if (err) {
+		dev_err(&device->dev, "failed to register misc dev: %d\n", err);
+		return err;
+	}
+
+	device->driver_data = smo8800;
+
+	smo8800->irq = smo8800_get_irq(device);
+	if (!smo8800->irq) {
+		dev_err(&device->dev, "failed to obtain IRQ\n");
+		err = -EINVAL;
+		goto error;
+	}
+
+	err = request_threaded_irq(smo8800->irq, smo8800_interrupt_quick,
+				   smo8800_interrupt_thread,
+				   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+				   DRIVER_NAME, smo8800);
+	if (err) {
+		dev_err(&device->dev,
+			"failed to request thread for IRQ %d: %d\n",
+			smo8800->irq, err);
+		goto error;
+	}
+
+	dev_dbg(&device->dev, "device /dev/freefall registered with IRQ %d\n",
+		 smo8800->irq);
+	return 0;
+
+error:
+	misc_deregister(&smo8800->miscdev);
+	return err;
+}
+
+static int smo8800_remove(struct acpi_device *device)
+{
+	struct smo8800_device *smo8800 = device->driver_data;
+
+	free_irq(smo8800->irq, smo8800);
+	misc_deregister(&smo8800->miscdev);
+	dev_dbg(&device->dev, "device /dev/freefall unregistered\n");
+	return 0;
+}
+
+static const struct acpi_device_id smo8800_ids[] = {
+	{ "SMO8800", 0 },
+	{ "SMO8810", 0 },
+	{ "", 0 },
+};
+
+MODULE_DEVICE_TABLE(acpi, smo8800_ids);
+
+static struct acpi_driver smo8800_driver = {
+	.name = DRIVER_NAME,
+	.class = "Latitude",
+	.ids = smo8800_ids,
+	.ops = {
+		.add = smo8800_add,
+		.remove = smo8800_remove,
+	},
+	.owner = THIS_MODULE,
+};
+
+module_acpi_driver(smo8800_driver);
+
+MODULE_DESCRIPTION("Dell Latitude freefall driver (ACPI SMO8800/SMO8810)");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sonal Santan, Pali Rohár");
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 399e8c562192..9b0c57cd1d4a 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -633,8 +633,7 @@ static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
 			dev = pci_scan_single_device(bus, 0);
 			if (dev) {
 				pci_bus_assign_resources(bus);
-				if (pci_bus_add_device(dev))
-					pr_err("Unable to hotplug wifi\n");
+				pci_bus_add_device(dev);
 			}
 		} else {
 			dev = pci_get_slot(bus, 0);
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 8ba8956b5a48..484a8673b835 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -53,6 +53,7 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
 #define HPWMI_ALS_QUERY 0x3
 #define HPWMI_HARDWARE_QUERY 0x4
 #define HPWMI_WIRELESS_QUERY 0x5
+#define HPWMI_BIOS_QUERY 0x9
 #define HPWMI_HOTKEY_QUERY 0xc
 #define HPWMI_FEATURE_QUERY 0xd
 #define HPWMI_WIRELESS2_QUERY 0x1b
@@ -144,6 +145,7 @@ static const struct key_entry hp_wmi_keymap[] = {
 	{ KE_KEY, 0x2142, { KEY_MEDIA } },
 	{ KE_KEY, 0x213b, { KEY_INFO } },
 	{ KE_KEY, 0x2169, { KEY_DIRECTION } },
+	{ KE_KEY, 0x216a, { KEY_SETUP } },
 	{ KE_KEY, 0x231b, { KEY_HELP } },
 	{ KE_END, 0 }
 };
@@ -304,6 +306,19 @@ static int hp_wmi_bios_2009_later(void)
 	return (state & 0x10) ? 1 : 0;
 }
 
+static int hp_wmi_enable_hotkeys(void)
+{
+	int ret;
+	int query = 0x6e;
+
+	ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),
+				   0);
+
+	if (ret)
+		return -EINVAL;
+	return 0;
+}
+
 static int hp_wmi_set_block(void *data, bool blocked)
 {
 	enum hp_wmi_radio r = (enum hp_wmi_radio) data;
@@ -648,6 +663,9 @@ static int __init hp_wmi_input_setup(void)
 			    hp_wmi_tablet_state());
 	input_sync(hp_wmi_input_dev);
 
+	if (hp_wmi_bios_2009_later() == 4)
+		hp_wmi_enable_hotkeys();
+
 	status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 	if (ACPI_FAILURE(status)) {
 		err = -EIO;
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index 6dd060a0bb65..b4c495a62eec 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -36,6 +36,8 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/i8042.h>
+#include <linux/dmi.h>
+#include <linux/device.h>
 
 #define IDEAPAD_RFKILL_DEV_NUM	(3)
 
@@ -819,6 +821,19 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 	}
 }
 
+/* Blacklist for devices where the ideapad rfkill interface does not work */
+static struct dmi_system_id rfkill_blacklist[] = {
+	/* The Lenovo Yoga 2 11 always reports everything as blocked */
+	{
+		.ident = "Lenovo Yoga 2 11",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2 11"),
+		},
+	},
+	{}
+};
+
 static int ideapad_acpi_add(struct platform_device *pdev)
 {
 	int ret, i;
@@ -833,7 +848,7 @@ static int ideapad_acpi_add(struct platform_device *pdev)
 	if (read_method_int(adev->handle, "_CFG", &cfg))
 		return -ENODEV;
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
@@ -844,7 +859,7 @@ static int ideapad_acpi_add(struct platform_device *pdev)
 
 	ret = ideapad_sysfs_init(priv);
 	if (ret)
-		goto sysfs_failed;
+		return ret;
 
 	ret = ideapad_debugfs_init(priv);
 	if (ret)
@@ -854,11 +869,10 @@ static int ideapad_acpi_add(struct platform_device *pdev)
 	if (ret)
 		goto input_failed;
 
-	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
-		if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
-			ideapad_register_rfkill(priv, i);
-		else
-			priv->rfk[i] = NULL;
+	if (!dmi_check_system(rfkill_blacklist)) {
+		for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
+			if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
+				ideapad_register_rfkill(priv, i);
 	}
 	ideapad_sync_rfk_state(priv);
 	ideapad_sync_touchpad_state(priv);
@@ -884,8 +898,6 @@ input_failed:
 	ideapad_debugfs_exit(priv);
 debugfs_failed:
 	ideapad_sysfs_exit(priv);
-sysfs_failed:
-	kfree(priv);
 	return ret;
 }
 
@@ -903,7 +915,6 @@ static int ideapad_acpi_remove(struct platform_device *pdev)
 	ideapad_debugfs_exit(priv);
 	ideapad_sysfs_exit(priv);
 	dev_set_drvdata(&pdev->dev, NULL);
-	kfree(priv);
 
 	return 0;
 }
diff --git a/drivers/platform/x86/intel_mid_thermal.c b/drivers/platform/x86/intel_mid_thermal.c
index 93fab8b70ce1..ab7860a21a22 100644
--- a/drivers/platform/x86/intel_mid_thermal.c
+++ b/drivers/platform/x86/intel_mid_thermal.c
@@ -481,7 +481,8 @@ static int mid_thermal_probe(struct platform_device *pdev)
 	int i;
 	struct platform_info *pinfo;
 
-	pinfo = kzalloc(sizeof(struct platform_info), GFP_KERNEL);
+	pinfo = devm_kzalloc(&pdev->dev, sizeof(struct platform_info),
+			     GFP_KERNEL);
 	if (!pinfo)
 		return -ENOMEM;
 
@@ -489,7 +490,6 @@ static int mid_thermal_probe(struct platform_device *pdev)
 	ret = mid_initialize_adc(&pdev->dev);
 	if (ret) {
 		dev_err(&pdev->dev, "ADC init failed");
-		kfree(pinfo);
 		return ret;
 	}
 
@@ -520,7 +520,6 @@ err:
 		thermal_zone_device_unregister(pinfo->tzd[i]);
 	}
 	configure_adc(0);
-	kfree(pinfo);
 	return ret;
 }
 
@@ -541,8 +540,6 @@ static int mid_thermal_remove(struct platform_device *pdev)
 		thermal_zone_device_unregister(pinfo->tzd[i]);
 	}
 
-	kfree(pinfo);
-
 	/* Stop the ADC */
 	return configure_adc(0);
 }
diff --git a/drivers/platform/x86/intel_pmic_gpio.c b/drivers/platform/x86/intel_pmic_gpio.c
index 2805988485f6..40929e4f7ad7 100644
--- a/drivers/platform/x86/intel_pmic_gpio.c
+++ b/drivers/platform/x86/intel_pmic_gpio.c
@@ -91,7 +91,7 @@ static void pmic_program_irqtype(int gpio, int type)
 
 static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 {
-	if (offset > 8) {
+	if (offset >= 8) {
 		pr_err("only pin 0-7 support input\n");
 		return -1;/* we only have 8 GPIO can use as input */
 	}
@@ -130,7 +130,7 @@ static int pmic_gpio_get(struct gpio_chip *chip, unsigned offset)
 	int ret;
 
 	/* we only have 8 GPIO pins we can use as input */
-	if (offset > 8)
+	if (offset >= 8)
 		return -EOPNOTSUPP;
 	ret = intel_scu_ipc_ioread8(GPIO0 + offset, &r);
 	if (ret < 0)
diff --git a/drivers/platform/x86/pvpanic.c b/drivers/platform/x86/pvpanic.c
index c9f6e511daa6..073a90a63dbc 100644
--- a/drivers/platform/x86/pvpanic.c
+++ b/drivers/platform/x86/pvpanic.c
@@ -70,6 +70,7 @@ pvpanic_panic_notify(struct notifier_block *nb, unsigned long code,
 
 static struct notifier_block pvpanic_panic_nb = {
 	.notifier_call = pvpanic_panic_notify,
+	.priority = 1, /* let this called before broken drm_fb_helper */
 };
 
 
diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index d1f030053176..5a5966512277 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -27,6 +27,7 @@
 #include <linux/debugfs.h>
 #include <linux/ctype.h>
 #include <linux/efi.h>
+#include <linux/suspend.h>
 #include <acpi/video.h>
 
 /*
@@ -340,6 +341,8 @@ struct samsung_laptop {
 	struct samsung_laptop_debug debug;
 	struct samsung_quirks *quirks;
 
+	struct notifier_block pm_nb;
+
 	bool handle_backlight;
 	bool has_stepping_quirk;
 
@@ -348,6 +351,8 @@ struct samsung_laptop {
 
 struct samsung_quirks {
 	bool broken_acpi_video;
+	bool four_kbd_backlight_levels;
+	bool enable_kbd_backlight;
 };
 
 static struct samsung_quirks samsung_unknown = {};
@@ -356,6 +361,11 @@ static struct samsung_quirks samsung_broken_acpi_video = {
 	.broken_acpi_video = true,
 };
 
+static struct samsung_quirks samsung_np740u3e = {
+	.four_kbd_backlight_levels = true,
+	.enable_kbd_backlight = true,
+};
+
 static bool force;
 module_param(force, bool, 0);
 MODULE_PARM_DESC(force,
@@ -1051,6 +1061,8 @@ static int __init samsung_leds_init(struct samsung_laptop *samsung)
 		samsung->kbd_led.brightness_set = kbd_led_set;
 		samsung->kbd_led.brightness_get = kbd_led_get;
 		samsung->kbd_led.max_brightness = 8;
+		if (samsung->quirks->four_kbd_backlight_levels)
+			samsung->kbd_led.max_brightness = 4;
 
 		ret = led_classdev_register(&samsung->platform_device->dev,
 					   &samsung->kbd_led);
@@ -1414,6 +1426,19 @@ static void samsung_platform_exit(struct samsung_laptop *samsung)
 	}
 }
 
+static int samsung_pm_notification(struct notifier_block *nb,
+				   unsigned long val, void *ptr)
+{
+	struct samsung_laptop *samsung;
+
+	samsung = container_of(nb, struct samsung_laptop, pm_nb);
+	if (val == PM_POST_HIBERNATION &&
+	    samsung->quirks->enable_kbd_backlight)
+		kbd_backlight_enable(samsung);
+
+	return 0;
+}
+
 static int __init samsung_platform_init(struct samsung_laptop *samsung)
 {
 	struct platform_device *pdev;
@@ -1534,6 +1559,15 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
 		},
 	 .driver_data = &samsung_broken_acpi_video,
 	},
+	{
+	 .callback = samsung_dmi_matched,
+	 .ident = "730U3E/740U3E",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+		DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
+		},
+	 .driver_data = &samsung_np740u3e,
+	},
 	{ },
 };
 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
@@ -1608,6 +1642,9 @@ static int __init samsung_init(void)
 	if (ret)
 		goto error_debugfs;
 
+	samsung->pm_nb.notifier_call = samsung_pm_notification;
+	register_pm_notifier(&samsung->pm_nb);
+
 	samsung_platform_device = samsung->platform_device;
 	return ret;
 
@@ -1633,6 +1670,7 @@ static void __exit samsung_exit(void)
 	struct samsung_laptop *samsung;
 
 	samsung = platform_get_drvdata(samsung_platform_device);
+	unregister_pm_notifier(&samsung->pm_nb);
 
 	samsung_debugfs_exit(samsung);
 	samsung_leds_exit(samsung);
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 15e61c16736e..d82f196e3cfe 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3171,8 +3171,10 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		KEY_MICMUTE,	/* 0x1a: Mic mute (since ?400 or so) */
 
 		/* (assignments unknown, please report if found) */
-		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 		KEY_UNKNOWN,
+
+		/* Extra keys in use since the X240 / T440 / T540 */
+		KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_COMPUTER,
 		},
 	};
 
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 46473ca7566b..76441dcbe5ff 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -56,6 +56,7 @@
 #include <linux/workqueue.h>
 #include <linux/i8042.h>
 #include <linux/acpi.h>
+#include <linux/dmi.h>
 #include <asm/uaccess.h>
 
 MODULE_AUTHOR("John Belmonte");
@@ -213,6 +214,30 @@ static const struct key_entry toshiba_acpi_keymap[] = {
 	{ KE_END, 0 },
 };
 
+/* alternative keymap */
+static const struct dmi_system_id toshiba_alt_keymap_dmi[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite M840"),
+		},
+	},
+	{}
+};
+
+static const struct key_entry toshiba_acpi_alt_keymap[] = {
+	{ KE_KEY, 0x157, { KEY_MUTE } },
+	{ KE_KEY, 0x102, { KEY_ZOOMOUT } },
+	{ KE_KEY, 0x103, { KEY_ZOOMIN } },
+	{ KE_KEY, 0x139, { KEY_ZOOMRESET } },
+	{ KE_KEY, 0x13e, { KEY_SWITCHVIDEOMODE } },
+	{ KE_KEY, 0x13c, { KEY_BRIGHTNESSDOWN } },
+	{ KE_KEY, 0x13d, { KEY_BRIGHTNESSUP } },
+	{ KE_KEY, 0x158, { KEY_WLAN } },
+	{ KE_KEY, 0x13f, { KEY_TOUCHPAD_TOGGLE } },
+	{ KE_END, 0 },
+};
+
 /* utility
  */
 
@@ -1440,6 +1465,7 @@ static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
 	acpi_handle ec_handle;
 	int error;
 	u32 hci_result;
+	const struct key_entry *keymap = toshiba_acpi_keymap;
 
 	dev->hotkey_dev = input_allocate_device();
 	if (!dev->hotkey_dev)
@@ -1449,7 +1475,9 @@ static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
 	dev->hotkey_dev->phys = "toshiba_acpi/input0";
 	dev->hotkey_dev->id.bustype = BUS_HOST;
 
-	error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
+	if (dmi_check_system(toshiba_alt_keymap_dmi))
+		keymap = toshiba_acpi_alt_keymap;
+	error = sparse_keymap_setup(dev->hotkey_dev, keymap, NULL);
 	if (error)
 		goto err_free_dev;