Merge commit 'acpi/test'

13 files changed, 1000 insertions, 30 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index c9eb6b5a6c7b..a5975c5f52d9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3245,6 +3245,11 @@ M:	robert.richter@amd.com
 L:	oprofile-list@lists.sf.net
 S:	Maintained
 
+OQO WMI EXTRAS DRIVER
+P:	Matthew Garrett
+M:	mjg59@srcf.ucam.org
+S:	Maintained
+
 ORACLE CLUSTER FILESYSTEM 2 (OCFS2)
 P:	Mark Fasheh
 M:	mfasheh@suse.com
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index f90be51b1123..9adac441ac9b 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -870,7 +870,7 @@ static int __kprobes pre_kprobes_handler(struct die_args *args)
 		return 1;
 
 ss_probe:
-#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM)
+#if !defined(CONFIG_PREEMPT) || defined(CONFIG_FREEZER)
 	if (p->ainsn.inst_flag == INST_FLAG_BOOSTABLE && !p->post_handler) {
 		/* Boost up -- we can execute copied instructions directly */
 		ia64_psr(regs)->ri = p->ainsn.slot;
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 884d985b8b82..e948b28a5a9a 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -446,7 +446,7 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
 static void __kprobes setup_singlestep(struct kprobe *p, struct pt_regs *regs,
 				       struct kprobe_ctlblk *kcb)
 {
-#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM)
+#if !defined(CONFIG_PREEMPT) || defined(CONFIG_FREEZER)
 	if (p->ainsn.boostable == 1 && !p->post_handler) {
 		/* Boost up -- we can execute copied instructions directly */
 		reset_current_kprobe();
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 1c6e73c7865e..4b084d8dc85b 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -414,7 +414,8 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
 		link->irq.active = irq;
 	}
 
-	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Set IRQ %d\n", link->irq.active));
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link %s set to IRQ %d\n",
+		acpi_device_bid(link->device), link->irq.active));
 
       end:
 	kfree(resource);
@@ -649,6 +650,9 @@ acpi_pci_link_allocate_irq(acpi_handle handle,
 		return -1;
 	}
 	link->refcnt++;
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+			  "Link %s is referenced %d\n",
+			  acpi_device_bid(link->device), link->refcnt));
 	mutex_unlock(&acpi_link_lock);
 
 	if (triggering)
@@ -657,9 +661,6 @@ acpi_pci_link_allocate_irq(acpi_handle handle,
 		*polarity = link->irq.polarity;
 	if (name)
 		*name = acpi_device_bid(link->device);
-	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			  "Link %s is referenced\n",
-			  acpi_device_bid(link->device)));
 	return (link->irq.active);
 }
 
@@ -692,23 +693,15 @@ int acpi_pci_link_free_irq(acpi_handle handle)
 		printk(KERN_ERR PREFIX "Link isn't initialized\n");
 		return -1;
 	}
-#ifdef	FUTURE_USE
-	/*
-	 * The Link reference count allows us to _DISable an unused link
-	 * and suspend time, and set it again  on resume.
-	 * However, 2.6.12 still has irq_router.resume
-	 * which blindly restores the link state.
-	 * So we disable the reference count method
-	 * to prevent duplicate acpi_pci_link_set()
-	 * which would harm some systems
-	 */
 	link->refcnt--;
-#endif
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			  "Link %s is dereferenced\n",
-			  acpi_device_bid(link->device)));
+			  "Link %s is dereferenced %d\n",
+			  acpi_device_bid(link->device), link->refcnt));
 
 	if (link->refcnt == 0) {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+			  "Link %s is disabled\n",
+			  acpi_device_bid(link->device)));
 		acpi_evaluate_object(link->device->handle, "_DIS", NULL, NULL);
 	}
 	mutex_unlock(&acpi_link_lock);
@@ -782,13 +775,17 @@ static int acpi_pci_link_add(struct acpi_device *device)
 	return result;
 }
 
-static int acpi_pci_link_resume(struct acpi_pci_link *link)
+static void acpi_pci_link_resume(struct acpi_pci_link *link)
 {
 
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link %s resume ref %d act %d ini %d\n",
+		acpi_device_bid(link->device), link->refcnt,
+		link->irq.active, link->irq.initialized));
+
 	if (link->refcnt && link->irq.active && link->irq.initialized)
-		return (acpi_pci_link_set(link, link->irq.active));
-	else
-		return 0;
+		acpi_pci_link_set(link, link->irq.active);
+
+	return;
 }
 
 static int irqrouter_resume(struct sys_device *dev)
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 9cf8ae6e4b39..d5749a7bc777 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_ATMEL_TCLIB)	+= atmel_tclib.o
 obj-$(CONFIG_ICS932S401)	+= ics932s401.o
 obj-$(CONFIG_LKDTM)		+= lkdtm.o
 obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
-obj-$(CONFIG_DELL_LAPTOP)	+= dell-laptop.o
 obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o
 obj-$(CONFIG_PHANTOM)		+= phantom.o
 obj-$(CONFIG_SGI_IOC4)		+= ioc4.o
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index e65448e99b48..017fb8173425 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -54,6 +54,18 @@ config ASUS_LAPTOP
 
 	  If you have an ACPI-compatible ASUS laptop, say Y or M here.
 
+config DELL_LAPTOP
+	tristate "Dell Laptop Extras (EXPERIMENTAL)"
+	depends on X86
+	depends on DCDBAS
+	depends on EXPERIMENTAL
+	depends on BACKLIGHT_CLASS_DEVICE
+	depends on RFKILL
+	default n
+	---help---
+	This driver adds support for rfkill and backlight control to Dell
+	laptops.
+
 config FUJITSU_LAPTOP
 	tristate "Fujitsu Laptop Extras"
 	depends on ACPI
@@ -120,6 +132,19 @@ config MSI_LAPTOP
 
 	  If you have an MSI S270 laptop, say Y or M here.
 
+config OQO_WMI
+       tristate "OQO WMI extras"
+       depends on ACPI_WMI
+       depends on INPUT
+       depends on RFKILL
+       depends on BACKLIGHT_CLASS_DEVICE
+       help
+         Say Y here if you want to support rfkill and backlight control on
+         series 2 OQO handheld devices.
+
+         To compile this driver as a module, choose M here: the module will
+         be called oqo-wmi.
+
 config PANASONIC_LAPTOP
 	tristate "Panasonic Laptop Extras"
 	depends on INPUT && ACPI
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 1e9de2ae0de5..37ac07f2362d 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -6,12 +6,14 @@ obj-$(CONFIG_ASUS_LAPTOP)	+= asus-laptop.o
 obj-$(CONFIG_EEEPC_LAPTOP)	+= eeepc-laptop.o
 obj-$(CONFIG_MSI_LAPTOP)	+= msi-laptop.o
 obj-$(CONFIG_COMPAL_LAPTOP)	+= compal-laptop.o
+obj-$(CONFIG_DELL_LAPTOP)	+= dell-laptop.o
 obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o
 obj-$(CONFIG_HP_WMI)		+= hp-wmi.o
 obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o
 obj-$(CONFIG_SONY_LAPTOP)	+= sony-laptop.o
 obj-$(CONFIG_THINKPAD_ACPI)	+= thinkpad_acpi.o
 obj-$(CONFIG_FUJITSU_LAPTOP)	+= fujitsu-laptop.o
+obj-$(CONFIG_OQO_WMI)		+= oqo-wmi.o
 obj-$(CONFIG_PANASONIC_LAPTOP)	+= panasonic-laptop.o
 obj-$(CONFIG_INTEL_MENLOW)	+= intel_menlow.o
 obj-$(CONFIG_ACPI_WMI)		+= wmi.o
diff --git a/drivers/misc/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 4d33a2068b7a..16e11c2ee19a 100644
--- a/drivers/misc/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -22,7 +22,7 @@
 #include <linux/rfkill.h>
 #include <linux/power_supply.h>
 #include <linux/acpi.h>
-#include "../firmware/dcdbas.h"
+#include "../../firmware/dcdbas.h"
 
 #define BRIGHTNESS_TOKEN 0x7d
 
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 02fe2b8b8939..9d93cb971e59 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -90,7 +90,7 @@ enum {
 };
 
 static const char *cm_getv[] = {
-	"WLDG", NULL, NULL, NULL,
+	"WLDG", "BTHG", NULL, NULL,
 	"CAMG", NULL, NULL, NULL,
 	NULL, "PBLG", NULL, NULL,
 	"CFVG", NULL, NULL, NULL,
@@ -99,7 +99,7 @@ static const char *cm_getv[] = {
 };
 
 static const char *cm_setv[] = {
-	"WLDS", NULL, NULL, NULL,
+	"WLDS", "BTHS", NULL, NULL,
 	"CAMS", NULL, NULL, NULL,
 	"SDSP", "PBLS", "HDPS", NULL,
 	"CFVS", NULL, NULL, NULL,
diff --git a/drivers/platform/x86/oqo-wmi.c b/drivers/platform/x86/oqo-wmi.c
new file mode 100644
index 000000000000..940e605cb460
--- /dev/null
+++ b/drivers/platform/x86/oqo-wmi.c
@@ -0,0 +1,941 @@
+/*
+ *  OQO WMI UPMC Extras
+ *
+ *  Copyright (C) 2008 Brian S. Julin <bri@abrij.org>
+ *
+ *  Based on acer-wmi:
+ *    Copyright (C) 2007-2008	Carlos Corbacho <cathectic@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ * NOTE: You need to turn SMI on in BIOS (if dmidecode works, you already have)
+ * NOTE: acpi-wmi support mandatory
+ * NOTE: backlight and inputdev support a must, ifdefs will come later
+ */
+
+/*
+ *
+ *  0.3: added WLAN enable switch, restore settings on unload,
+ *       resume/suspend handling
+ *  0.2: Still not production-ready, but added ambient light sensor,
+ *       backlight, and it prints the unit serial number to dmesg (do
+ *       not know where to make that available to userspace yet.)
+ *  0.1: This is a first cut.  Plan to reboot after playing with this.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/i8042.h>
+#include <linux/input-polldev.h>
+#include <linux/rfkill.h>
+
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Brian Julin");
+MODULE_DESCRIPTION("OQO UPMC WMI Extras Driver");
+MODULE_LICENSE("GPL");
+
+#define OQO_LOGPREFIX "oqo-wmi: "
+#define OQO_ERR KERN_ERR OQO_LOGPREFIX
+#define OQO_NOTICE KERN_NOTICE OQO_LOGPREFIX
+#define OQO_INFO KERN_INFO OQO_LOGPREFIX
+
+#define OQO_KINE_MAXTRY 3
+
+/* Store defined devices globally since we only have one instance. */
+static struct platform_device *oqo_platform_device;
+static struct backlight_device *oqo_backlight_device;
+static struct rfkill *oqo_rfkill;
+static struct input_dev *oqo_kine;
+static struct input_polled_dev *oqo_kine_polled;
+
+/* Likewise store current and original settings globally. */
+struct oqo_settings {
+	int lid_wakes;		/* not sure if ACPI handles/needs help here */
+	int kine_itvl;
+	int bl_bright;
+};
+
+static struct oqo_settings orig, curr;
+
+/* Some of this code is left like in acer-wmi so we can add the older
+   Model 01 and any future models more easily, but we should not expect
+   it to be as complicated as Acer given each model is a leap rather than
+   a subtle variant on the last, so we aren't using "quirks" perse.  Not
+   sure if there is any real difference for our purposes between the o2
+   and e2.
+*/
+struct oqo_model {
+	const char *model;
+	u16 model_subs;
+};
+#define MODEL_SUB_OQO_O2_SMB0 3
+
+static struct oqo_model oqo_models[] = {
+	{
+	 .model = "Model 2",
+	 .model_subs = MODEL_SUB_OQO_O2_SMB0,
+	 },
+	{}
+};
+
+static struct oqo_model *model;
+
+static int force;
+module_param(force, bool, 0644);
+MODULE_PARM_DESC(force, "Force WMI detection even if DMI detection failed");
+
+/*
+ * OQO Model 2 SMBUS registers
+ * We are just using WMI to read the Cx700 smbus, to share the
+ * ACPI mutex (what may also eventually work in VMs/win32)
+ * Using i2c-viapro directly could interfere with PM.
+ */
+
+#define OQO_O2_SMB0_WWAN_DSBL_ADDR	0x19
+#define OQO_O2_SMB0_WWAN_DSBL_MASK	0x02
+#define OQO_O2_SMB0_LUMIN_LO		0x20
+#define OQO_O2_SMB0_LUMIN_HI		0x21
+#define OQO_O2_SMB0_BL_LO		0x26
+#define OQO_O2_SMB0_BL_HI		0x27
+#define OQO_O2_SMB0_ACCEL_POLL_ITVL	0x45
+#define OQO_O2_SMB0_ACCEL_XLO		0x50
+#define OQO_O2_SMB0_ACCEL_XHI		0x51
+#define OQO_O2_SMB0_ACCEL_YLO		0x52
+#define OQO_O2_SMB0_ACCEL_YHI		0x53
+#define OQO_O2_SMB0_ACCEL_ZLO		0x54
+#define OQO_O2_SMB0_ACCEL_ZHI		0x55
+/* These may be handled by ACPI not sure yet. */
+#define OQO_O2_SMB0_LID_WAKES_ADDR	0x58
+#define OQO_O2_SMB0_LID_WAKES_MASK	0x08
+
+#define OQO_O2_SMB0_SERIAL_START	0x70
+#define OQO_O2_SMB0_SERIAL_LEN		11
+
+static char oqo_sn[OQO_O2_SMB0_SERIAL_LEN + 1];
+
+/* Other addresses I have noticed used on the 02 SMBUS (from DSDT and whatnot)
+ *
+ * These are not used because the linux ACPI drivers work fine on them
+ *
+ * 0x0A -- processor sleep mode?
+ * 0x0C -- ACPI events, probably clears when read.
+ * 0x30 -- thermal zone
+ *      There is something going on at 0x31 through 0x34 which is likely
+ *      also thermal.  The values change over time.  Have not figured that
+ *      out yet.
+ * 0x41 -- AC detect
+ * 0x42 -- LID button   ACTUALLY THIS DOES NOT WORK AND NEEDS TO BE FIXED
+ * 0xa0 and 0xa1 -- battery something (presence? state?)
+ * 0xa4 to 0xcf -- battery info (0xc8-0xca contains "OQO")
+ * 0xd4 to 0xef -- other battery stats
+ */
+
+/*
+ * OQO method GUIDs
+ */
+#define OQO_O2_AMW0_GUID "ABBC0F6D-8EA1-11D1-00A0-C90629100000"
+MODULE_ALIAS("wmi:ABBC0F6D-8EA1-11D1-00A0-C90629100000");
+
+/*
+ * Interface type flags
+ */
+enum interface_type {
+	OQO_O2_AMW0,
+};
+
+/* Each low-level interface must define at least some of the following */
+struct wmi_interface {
+	/* The WMI device type */
+	u32 type;
+};
+
+static struct wmi_interface AMW0_interface = {
+	.type = OQO_O2_AMW0,
+};
+
+/* The detected/chosen interface */
+static struct wmi_interface *interface;
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+	model = dmi->driver_data;
+	/*
+	 * Detect which ACPI-WMI interface we're using.
+	 */
+	if (wmi_has_guid(OQO_O2_AMW0_GUID))
+		interface = &AMW0_interface;
+
+	return 0;
+}
+
+static struct dmi_system_id oqo_dmis[] = {
+	{
+	 .callback = dmi_matched,
+	 .ident = "OQO 02",
+	 .matches = {
+		     DMI_MATCH(DMI_SYS_VENDOR, "OQO Inc."),
+		     DMI_MATCH(DMI_PRODUCT_NAME, "OQO Model 2"),
+		     },
+	 .driver_data = oqo_models + 0,
+	 },
+	{}
+};
+
+/*
+ * AMW0 (V1) interface on OQO Model 2
+ *
+ * wmba: has four functions selected by int arg 1.  arg2 is 3 byte buffer.
+ *       1: performs GETB method on the SMBUS using bytes 0, 1 of Arg2
+ *          returns a buffer object containing a single byte
+ *       2: performs SETB on SMBUS using bytes 0, 1, 2 of Arg2
+ *          returns 0 as int.
+ *       3: dumps 256 values into a given SMBUS register (not used here)
+ *          returns 0 as int.
+ *       4: puts byte 0 of arg2 into some sort of busy flag.  Some ACPI
+ *          funcs check this (==0) to decide if SMBUS operations are safe.
+ *          returns 0 as int.
+ * wmbb: simply returns the busy flag set by wmba #4
+ */
+static acpi_status oqo_smbus_getb(u8 addr, u8 *result)
+{
+	struct acpi_buffer input, res;
+	acpi_status status;
+	union acpi_object *obj;
+	u32 arg2;
+
+	input.length = 4;
+	input.pointer = &arg2;
+	res.length = ACPI_ALLOCATE_BUFFER;
+	res.pointer = NULL;
+
+	arg2 = addr;
+	arg2 <<= 8;
+	arg2 |= 0x12;		/* HOSTCMD */
+
+	status = wmi_evaluate_method(OQO_O2_AMW0_GUID, 1, 1, &input, &res);
+
+	if (status != AE_OK)
+		return status;
+
+	obj = (union acpi_object *)res.pointer;
+	if (!obj)
+		return AE_NULL_OBJECT;
+
+	if (obj->type != ACPI_TYPE_BUFFER
+	    || obj->buffer.length != 1 || obj->buffer.pointer == NULL) {
+		kfree(obj);
+		return AE_TYPE;
+	}
+	*result = ((u8 *) (obj->buffer.pointer))[0];
+	kfree(obj);
+	return status;
+}
+
+static acpi_status oqo_smbus_setb(u8 addr, u8 val)
+{
+	struct acpi_buffer input, res;
+	acpi_status status;
+	union acpi_object *obj;
+	u32 arg2;
+
+	input.length = 4;
+	input.pointer = &arg2;
+	res.length = ACPI_ALLOCATE_BUFFER;
+	res.pointer = NULL;
+
+	arg2 = val;
+	arg2 <<= 8;
+	arg2 |= addr;
+	arg2 <<= 8;
+	arg2 |= 0x12;		/* HOSTCMD */
+
+	status = wmi_evaluate_method(OQO_O2_AMW0_GUID, 1, 2, &input, &res);
+
+	if (status != AE_OK)
+		return status;
+
+	obj = (union acpi_object *)res.pointer;
+	if (!obj)
+		return AE_NULL_OBJECT;
+
+	if (obj->type != ACPI_TYPE_INTEGER) {
+		kfree(obj);
+		return AE_TYPE;
+	}
+	kfree(obj);
+	return status;
+}
+
+/*
+ * We assume we are the only one using this ...ahem... "lock" on
+ * the SMBUS because it would be pathetically noneffective otherwise.
+ *
+ * Nonzero silly_lock will keep certain ACPI routines away from the
+ * SMBUS (if they aren't already on it when you call it.)  Zero
+ *  silly_lock will let them back on
+ *
+ * This is probably useful before sleeping the system, and one
+ * waits until any ACPI funcs would have long finished before
+ * proceeding.  It seems harmless enough and will work to wrap
+ * more accesses with it.
+ */
+static acpi_status oqo_lock_smbus(int silly_lock)
+{
+	struct acpi_buffer input, res;
+	acpi_status status;
+	union acpi_object *obj;
+	u32 arg2;
+
+	input.length = 4;
+	input.pointer = &arg2;
+	res.length = ACPI_ALLOCATE_BUFFER;
+	res.pointer = NULL;
+
+	arg2 = !!silly_lock;
+
+	status = wmi_evaluate_method(OQO_O2_AMW0_GUID, 1, 4, &input, &res);
+
+	if (status != AE_OK)
+		return status;
+
+	obj = (union acpi_object *)res.pointer;
+	if (!obj)
+		return AE_NULL_OBJECT;
+
+	if (obj->type != ACPI_TYPE_INTEGER) {
+		kfree(obj);
+		return AE_TYPE;
+	}
+	kfree(obj);
+	return status;
+}
+
+static int smread_s16(u8 hi_addr, u8 lo_addr)
+{
+	s16 ret = -1;
+	acpi_status status;
+	u8 r;
+
+	/* Keep some ACPI routines off the SMBUS */
+	status = oqo_lock_smbus(1);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	status = oqo_smbus_getb(hi_addr, &r);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	ret = r;
+	ret <<= 8;
+
+	status = oqo_smbus_getb(lo_addr, &r);
+	if (ACPI_FAILURE(status)) {
+		ret = -1;
+		goto skip;
+	}
+
+	ret |= r;
+	ret &= 0x7fff;
+skip:
+	/* Let ACPI routines back on the SMBUS */
+	status = oqo_lock_smbus(0);
+	if (ACPI_FAILURE(status))
+		return -1;
+	return (int)ret;
+}
+
+static int smwrite_s16(u8 hi_addr, u8 lo_addr, s16 val)
+{
+	acpi_status status;
+	u8 r;
+	int ret = -1;
+
+	status = oqo_lock_smbus(1);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	r = (val >> 8) & 0x7f;
+	status = oqo_smbus_setb(hi_addr, r);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	r = val & 0xff;
+	status = oqo_smbus_setb(lo_addr, r);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	ret = 0;
+skip:
+	status = oqo_lock_smbus(0);
+	if (ACPI_FAILURE(status))
+		return -1;
+	return ret;
+}
+
+static int smread_u8(u8 addr)
+{
+	int ret = -1;
+	acpi_status status;
+	u8 r;
+
+	status = oqo_lock_smbus(1);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	status = oqo_smbus_getb(addr, &r);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	ret = r;
+skip:
+	status = oqo_lock_smbus(0);
+	if (ACPI_FAILURE(status))
+		return -1;
+	return (int)ret;
+}
+
+static int smwrite_u8(u8 addr, u8 val)
+{
+	acpi_status status;
+	int ret = -1;
+
+	status = oqo_lock_smbus(1);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	status = oqo_smbus_setb(addr, val);
+	if (ACPI_FAILURE(status))
+		goto skip;
+
+	ret = 0;
+skip:
+	status = oqo_lock_smbus(0);
+	if (ACPI_FAILURE(status))
+		return -1;
+	return ret;
+}
+
+/*
+ * Accelerometer inputdev
+ */
+
+/*
+ * Get a reading of the accelerometer from the firwmware and push
+ * it to an inputdev.
+ *
+ * Also the ambient light detector hitch-hikes on the inputdev, since
+ * it could be useful in some of the same applications for accelerometers.
+ *
+ * Available information and a bit of poking have not found a
+ * way to freeze a snapshot of the accelerometer data, so we have
+ * to do consistency checks to reduce the odds that we mix low
+ * and high bytes from different updates.
+ *
+ * Unfortunately SMBUS access is very slow (11ms) and the firmware API
+ * does not provide 2-byte transfers, so mixed readings happen and
+ * have to be corrected a lot.  (Do not know why; it should be a
+ * multi-kHz.. bus and the reads take only a hundred-ish cycles/byte.
+ * It is not the ACPI function -- it is slow on i2c-viapro as well.)
+ *
+ * Since there is such a big time lag between readings, the axis
+ * are decoupled and reported separately on different timelines as
+ * different events rather than as a set.
+ */
+static acpi_status oqo_read_kine(int *good, s16 *x, s16 *y, s16 *z,
+				 u16 *lumin)
+{
+	u8 hiregs[4] = { OQO_O2_SMB0_ACCEL_XHI,
+		OQO_O2_SMB0_ACCEL_YHI,
+		OQO_O2_SMB0_ACCEL_ZHI,
+		OQO_O2_SMB0_LUMIN_HI
+	};
+	u8 loregs[4] = { OQO_O2_SMB0_ACCEL_XLO,
+		OQO_O2_SMB0_ACCEL_YLO,
+		OQO_O2_SMB0_ACCEL_ZLO,
+		OQO_O2_SMB0_LUMIN_LO
+	};
+
+	short ax[4] = { ABS_X, ABS_Y, ABS_Z, ABS_MISC };
+	u8 realgood = 0;
+	u16 res[4];
+	acpi_status status;
+	int i;
+
+	*good = 0;
+
+	/* Routine: Starting with the lo byte, read lo/hi bytes
+	   alternately until two lo byte readings, match.  Then
+	   take that reading and combine it with the hi reading
+	   sandwiched between.  Errors can still happen when
+	   jittering at wrap boundaries, but should be rare.
+
+	   Don't use this for missile guidance.
+
+	   Userspace post-processing error detection encouraged.
+	 */
+	for (i = 0; i < 4; i++) {
+		int maxtry;
+		u32 log;
+		u8 r, lo, hi;
+
+		lo = loregs[i];
+		hi = hiregs[i];
+		log = 0;
+
+#define LOGRES(reg)  do { \
+			status = oqo_smbus_getb(reg, &r);		\
+			log <<= 8; log |= r; log &= 0xffffff;		\
+			if (ACPI_FAILURE(status))			\
+				goto leave;				\
+		} while (0)
+
+		maxtry = OQO_KINE_MAXTRY + 1;
+		while (maxtry) {
+			LOGRES(lo);
+			if (maxtry <= OQO_KINE_MAXTRY &&
+			    (log >> 16) == (log & 0xff)) {
+				*(res + i) = log & 0xffff;
+				break;
+			}
+			LOGRES(hi);
+			maxtry--;
+		}
+
+		if (maxtry == OQO_KINE_MAXTRY)
+			realgood |= 1 << i;
+
+		if (maxtry) {
+			*good |= 1 << i;
+			/* JIC CYA: this bit may be reserved */
+			res[3] &= 0x7fff;
+			input_report_abs(oqo_kine, ax[i], (s16) res[i]);
+		}
+		/* else we had trouble getting the reading to lock
+		   and we skip reporting this axis.
+		 */
+	}
+
+	*x = (u16) res[0];
+	*y = (u16) res[1];
+	*z = (u16) res[2];
+	*lumin = (u16) res[3];
+	return status;
+leave:
+	return status;
+}
+
+/*
+ * Generic Device (interface-independent)
+ */
+
+static void oqo_kine_poll(struct input_polled_dev *dev)
+{
+	s16 x, y, z;
+	u16 lumin;
+	int good;
+	/*      struct timeval tv1, tv2; */
+
+	if (dev != oqo_kine_polled)
+		return;
+	if (orig.kine_itvl < 0)
+		return;
+
+	x = y = z = 0;
+	oqo_read_kine(&good, &x, &y, &z, &lumin);
+}
+
+static int __devinit oqo_kine_init(void)
+{
+	int err;
+
+	oqo_kine = input_allocate_device();
+	if (!oqo_kine)
+		return -ENOMEM;
+
+	oqo_kine->name = "OQO embedded accelerometer";
+	oqo_kine->phys = "platform:oqo-wmi:kine";
+	oqo_kine->id.bustype = 0;
+	oqo_kine->id.vendor = 0;
+	oqo_kine->id.product = 2;
+	oqo_kine->id.version = 0;
+	oqo_kine->evbit[0] = BIT_MASK(EV_ABS);
+	set_bit(ABS_X, oqo_kine->absbit);
+	set_bit(ABS_Y, oqo_kine->absbit);
+	set_bit(ABS_Z, oqo_kine->absbit);
+	set_bit(ABS_MISC, oqo_kine->absbit);
+	oqo_kine->absmin[ABS_X] =
+	    oqo_kine->absmin[ABS_Y] =
+	    oqo_kine->absmin[ABS_Z] = oqo_kine->absmin[ABS_MISC] = -32768;
+	oqo_kine->absmax[ABS_X] =
+	    oqo_kine->absmax[ABS_Y] =
+	    oqo_kine->absmax[ABS_Z] = oqo_kine->absmax[ABS_MISC] = 32767;
+
+	memcpy(oqo_kine->dev.bus_id, "kine", 4);
+
+	oqo_kine_polled = input_allocate_polled_device();
+	if (!oqo_kine_polled) {
+		err = -ENOMEM;
+		goto bail0;
+	}
+
+	oqo_kine_polled->poll = oqo_kine_poll;
+	oqo_kine_polled->poll_interval = 250;
+	oqo_kine_polled->input = oqo_kine;
+
+	orig.kine_itvl = -1;	/* prevent callback from running */
+	err = input_register_polled_device(oqo_kine_polled);
+	if (err) {
+		printk(OQO_ERR "Failed to register OQO kine input\n");
+		goto bail1;
+	}
+
+	/* This will allow the callback to run now if successful. */
+	orig.kine_itvl = smread_u8(OQO_O2_SMB0_ACCEL_POLL_ITVL);
+	smwrite_u8(OQO_O2_SMB0_ACCEL_POLL_ITVL, 250);
+	curr.kine_itvl = smread_u8(OQO_O2_SMB0_ACCEL_POLL_ITVL);
+	if (orig.kine_itvl < 0 || curr.kine_itvl != 250) {
+		printk(OQO_ERR "Test communication with kine sensor failed\n");
+		err = -ENODEV;
+		goto bail2;
+	}
+
+	printk(OQO_INFO "Created OQO kine input.\n");
+	printk(OQO_INFO "Firmware interval %ims, driver interval %ims\n",
+	       curr.kine_itvl, oqo_kine_polled->poll_interval);
+	return 0;
+bail2:
+	input_unregister_polled_device(oqo_kine_polled);
+bail1:
+	input_free_polled_device(oqo_kine_polled);	/* frees oqo_kine */
+	return err;
+bail0:
+	input_free_device(oqo_kine);
+	return err;
+}
+
+static void __devexit oqo_kine_fini(void)
+{
+	smwrite_u8(OQO_O2_SMB0_ACCEL_POLL_ITVL, orig.kine_itvl);
+	input_unregister_polled_device(oqo_kine_polled);
+	input_free_polled_device(oqo_kine_polled);
+}
+
+/*
+ * Backlight device
+ */
+static int read_brightness(struct backlight_device *bd)
+{
+	return (int)smread_s16(OQO_O2_SMB0_BL_HI, OQO_O2_SMB0_BL_LO);
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+	return smwrite_s16(OQO_O2_SMB0_BL_HI,
+			   OQO_O2_SMB0_BL_LO, (s16) bd->props.brightness);
+}
+
+static struct backlight_ops oqo_bl_ops = {
+	.get_brightness = read_brightness,
+	.update_status = update_bl_status,
+};
+
+static int __devinit oqo_backlight_init(struct device *dev)
+{
+	struct backlight_device *bd;
+
+	/*
+	 * It would be nice if someone would figure out how backlights
+	 * like these, which are not driven through the video hardware,
+	 * are supposed to find their associated fb and bind to it (and
+	 * rebind when fb drivers change.
+	 *
+	 * Most extras backlights just shove a junk name in like we do here,
+	 * and don't end up integrated with fbcon sysfs as a result.
+	 */
+	bd = backlight_device_register("oqo-bl", dev, NULL, &oqo_bl_ops);
+
+	if (IS_ERR(bd)) {
+		printk(OQO_ERR "Could not register OQO backlight device\n");
+		oqo_backlight_device = NULL;
+		return PTR_ERR(bd);
+	}
+
+	oqo_backlight_device = bd;
+	bd->props.max_brightness = 0x7fff;
+	curr.bl_bright = orig.bl_bright = bd->props.brightness =
+	    read_brightness(NULL);
+
+	if (bd->props.brightness < 0)
+		goto fail;
+
+	backlight_update_status(bd);
+	printk(OQO_INFO "Found backlight set at %i\n", bd->props.brightness);
+	return 0;
+
+fail:
+	backlight_device_unregister(oqo_backlight_device);
+	oqo_backlight_device = NULL;
+	return -ENODEV;
+}
+
+static void __devexit oqo_backlight_fini(void)
+{
+	if (!oqo_backlight_device)
+		return;
+	oqo_backlight_device->props.brightness = orig.bl_bright;
+	backlight_update_status(oqo_backlight_device);
+	backlight_device_unregister(oqo_backlight_device);
+}
+
+/*
+ * RFKill device
+ */
+
+static int oqo_rfkill_get(void *data, enum rfkill_state *state)
+{
+	int res;
+
+	res = smread_u8(OQO_O2_SMB0_WWAN_DSBL_ADDR);
+	if (res < 0)
+		return res;
+
+	res &= OQO_O2_SMB0_WWAN_DSBL_MASK;
+
+	if (res)
+		*state = RFKILL_STATE_SOFT_BLOCKED;
+	else
+		*state = RFKILL_STATE_UNBLOCKED;
+
+	return 0;
+}
+
+static int oqo_rfkill_toggle(void *data, enum rfkill_state state)
+{
+	int res;
+
+	res = smread_u8(OQO_O2_SMB0_WWAN_DSBL_ADDR);
+
+	if (state == RFKILL_STATE_UNBLOCKED)
+		res &= ~OQO_O2_SMB0_WWAN_DSBL_MASK;
+	else
+		res |= OQO_O2_SMB0_WWAN_DSBL_MASK;
+
+	return smwrite_u8(OQO_O2_SMB0_WWAN_DSBL_ADDR, res);
+}
+
+static int __devinit oqo_rfkill_init(struct device *dev)
+{
+	int res;
+
+	oqo_rfkill = rfkill_allocate(dev, RFKILL_TYPE_WWAN);
+	if (!oqo_rfkill)
+		return -ENODEV;
+
+	res = smread_u8(OQO_O2_SMB0_WWAN_DSBL_ADDR);
+	res &= OQO_O2_SMB0_WWAN_DSBL_MASK;
+
+	oqo_rfkill->name = "oqo-wwan";
+	if (res)
+		oqo_rfkill->state = RFKILL_STATE_SOFT_BLOCKED;
+	else
+		oqo_rfkill->state = RFKILL_STATE_UNBLOCKED;
+
+	oqo_rfkill->get_state = oqo_rfkill_get;
+	oqo_rfkill->toggle_radio = oqo_rfkill_toggle;
+	oqo_rfkill->user_claim_unsupported = 1;
+
+	res = rfkill_register(oqo_rfkill);
+
+	if (res)
+		rfkill_free(oqo_rfkill);
+
+	return res;
+}
+
+static void __devexit oqo_rfkill_fini(void)
+{
+	if (!oqo_rfkill)
+		return;
+	rfkill_unregister(oqo_rfkill);
+}
+
+/*
+ * Platform device
+ */
+
+static int __devinit oqo_platform_probe(struct platform_device *device)
+{
+	int err;
+	int i;
+	char *troubleok = "trouble, but continuing.\n";
+
+	memset(oqo_sn, 0, OQO_O2_SMB0_SERIAL_LEN + 1);
+	for (i = 0; i < OQO_O2_SMB0_SERIAL_LEN; i++) {
+		err = oqo_smbus_getb(OQO_O2_SMB0_SERIAL_START + i, oqo_sn + i);
+		if (err) {
+			printk(OQO_ERR "Serial number check failed.\n");
+			return err;
+		}
+	}
+	printk(OQO_INFO "Found OQO with serial number %s.\n", oqo_sn);
+
+	err = oqo_backlight_init(&device->dev);
+	if (err)
+		printk(OQO_ERR "Backlight init %s", troubleok);
+
+	err = oqo_rfkill_init(&device->dev);
+	if (err)
+		printk(OQO_ERR "RFKill init %s", troubleok);
+
+	/* LID does not work at all yet, and this may be taken
+	   care of by ACPI.
+	 */
+	orig.lid_wakes = smread_u8(OQO_O2_SMB0_LID_WAKES_ADDR);
+	orig.lid_wakes &= OQO_O2_SMB0_LID_WAKES_MASK;
+	orig.lid_wakes = curr.lid_wakes = !!orig.lid_wakes;
+	if (orig.lid_wakes < 0) {
+		printk(OQO_ERR "Wake on LID event %s", troubleok);
+	} else {
+		printk(OQO_INFO "Wake on LID is %s.\n",
+		       (orig.lid_wakes ? "on" : "off"));
+	}
+
+	err = oqo_kine_init();
+	return err;
+}
+
+static int oqo_platform_remove(struct platform_device *device)
+{
+	oqo_backlight_fini();
+	oqo_rfkill_fini();
+	oqo_kine_fini();
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int oqo_platform_suspend(struct platform_device *dev, pm_message_t state)
+{
+	if (!interface)
+		return -ENOMEM;
+
+	/* This sticks during boot so do not turn it entirely off */
+	if (oqo_backlight_device) {
+		curr.bl_bright = read_brightness(oqo_backlight_device);
+		smwrite_s16(OQO_O2_SMB0_BL_HI, OQO_O2_SMB0_BL_LO, 256);
+	}
+	return 0;
+}
+
+static int oqo_platform_resume(struct platform_device *device)
+{
+	if (!interface)
+		return -ENOMEM;
+
+	if (oqo_backlight_device) {
+		smwrite_s16(OQO_O2_SMB0_BL_HI,
+			    OQO_O2_SMB0_BL_LO, curr.bl_bright);
+	}
+
+	return 0;
+}
+
+#else
+#define oqo_platform_suspend NULL
+#define oqo_platform_resume  NULL
+#endif
+
+static struct platform_driver oqo_platform_driver = {
+	.driver = {
+		   .name = "oqo-wmi",
+		   .owner = THIS_MODULE,
+		   },
+	.probe = oqo_platform_probe,
+	.remove = oqo_platform_remove,
+	.suspend = oqo_platform_suspend,
+	.resume = oqo_platform_resume,
+};
+
+static int __init oqo_wmi_init(void)
+{
+	int err;
+
+	dmi_check_system(oqo_dmis);
+
+	if (!interface && force) {
+		model = oqo_models;
+		if (wmi_has_guid(OQO_O2_AMW0_GUID))
+			interface = &AMW0_interface;
+	}
+
+	if (!interface) {
+		printk(OQO_ERR "No or unsupported WMI interface. Aborting.\n");
+		printk(OQO_ERR "Hint: Get dmidecode working and try again.\n");
+		printk(OQO_ERR "(Check \"System Management BIOS\" in BIOS)\n");
+		if (!force)
+			printk(OQO_ERR "Use the force option to skip DMI"
+			       " checking\n");
+		return -ENODEV;
+	}
+
+	err = platform_driver_register(&oqo_platform_driver);
+	if (err) {
+		printk(OQO_ERR "platform_driver_register gave %d.\n", err);
+		goto bail0;
+	}
+
+	oqo_platform_device = platform_device_alloc("oqo-wmi", -1);
+	if (!oqo_platform_device) {
+		printk(OQO_ERR "Could not allocate platform device.\n");
+		err = -ENOMEM;
+		goto bail1;
+	}
+
+	err = platform_device_add(oqo_platform_device);
+	if (err) {
+		printk(OQO_ERR "platform_device_add gave %d.\n", err);
+		platform_device_put(oqo_platform_device);
+		goto bail1;
+	}
+
+	return 0;
+
+bail1:
+	platform_driver_unregister(&oqo_platform_driver);
+bail0:
+	return err;
+}
+
+static void __exit oqo_wmi_fini(void)
+{
+	platform_device_del(oqo_platform_device);
+	platform_driver_unregister(&oqo_platform_driver);
+
+	return;
+}
+
+module_init(oqo_wmi_init);
+module_exit(oqo_wmi_fini);
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index 813e4b6c2c0d..bf8d4cfd8cf5 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -245,7 +245,7 @@ struct acpi_table_fadt {
 #define ACPI_FADT_POWER_BUTTON      (1<<4)	/* 04: Power button is handled as a generic feature */
 #define ACPI_FADT_SLEEP_BUTTON      (1<<5)	/* 05: Sleep button is handled as a generic feature, or  not present */
 #define ACPI_FADT_FIXED_RTC         (1<<6)	/* 06: RTC wakeup stat not in fixed register space */
-#define ACPI_FADT_S4_RTC_WAKE       (1<<7)	/* 07: RTC wakeup stat not possible from S4 */
+#define ACPI_FADT_S4_RTC_WAKE       (1<<7)	/* 07: RTC wakeup possible from S4 */
 #define ACPI_FADT_32BIT_TIMER       (1<<8)	/* 08: tmr_val is 32 bits 0=24-bits */
 #define ACPI_FADT_DOCKING_SUPPORTED (1<<9)	/* 09: Docking supported */
 #define ACPI_FADT_RESET_REGISTER    (1<<10)	/* 10: System reset via the FADT RESET_REG supported */
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 1b9cbdc0127a..7ba8cd9845cb 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -123,7 +123,7 @@ static int collect_garbage_slots(void);
 static int __kprobes check_safety(void)
 {
 	int ret = 0;
-#if defined(CONFIG_PREEMPT) && defined(CONFIG_PM)
+#if defined(CONFIG_PREEMPT) && defined(CONFIG_FREEZER)
 	ret = freeze_processes();
 	if (ret == 0) {
 		struct task_struct *p, *q;
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index 597823b5b700..d7a10167a25b 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -4,7 +4,8 @@ EXTRA_CFLAGS	+=	-DDEBUG
 endif
 
 obj-y				:= main.o
-obj-$(CONFIG_PM_SLEEP)		+= process.o console.o
+obj-$(CONFIG_PM_SLEEP)		+= console.o
+obj-$(CONFIG_FREEZER)		+= process.o
 obj-$(CONFIG_HIBERNATION)	+= swsusp.o disk.o snapshot.o swap.o user.o
 
 obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o