Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  Merge branches 'release' and 'buildfix' into release
  acer-wmi - Add documentation
  sonypi - Move sonypi.txt to Documentation/laptops
  sony-laptop - Move sony-laptop.txt to Documentation/laptops
  thinkpad-acpi - Move thinkpad-acpi.txt to Documentation/laptops
  Documentation - Create laptops sub-directory
  ACPI: thermal: buildfix for CONFIG_THERMAL=n
  cpuidle: build fix for non-x86
  acer-wmi: Fix backlight on AMW0 (V1) laptops
  tc1100-wmi: Mark as experimental
  ACPI: SBS: Host controller must initialize before SBS.

15 files changed, 269 insertions, 22 deletions

diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index 6e9c4050a41..8d556707bb6 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -227,6 +227,8 @@ kref.txt
 	- docs on adding reference counters (krefs) to kernel objects.
 laptop-mode.txt
 	- how to conserve battery power using laptop-mode.
+laptops/
+	- directory with laptop related info and laptop driver documentation.
 ldm.txt
 	- a brief description of LDM (Windows Dynamic Disks).
 leds-class.txt
@@ -351,10 +353,6 @@ sh/
 	- directory with info on porting Linux to a new architecture.
 smart-config.txt
 	- description of the Smart Config makefile feature.
-sony-laptop.txt
-	- Sony Notebook Control Driver (SNC) Readme.
-sonypi.txt
-	- info on Linux Sony Programmable I/O Device support.
 sound/
 	- directory with info on sound card support.
 sparc/
@@ -385,8 +383,6 @@ sysrq.txt
 	- info on the magic SysRq key.
 telephony/
 	- directory with info on telephony (e.g. voice over IP) support.
-thinkpad-acpi.txt
-	- information on the (IBM and Lenovo) ThinkPad ACPI Extras driver.
 time_interpolators.txt
 	- info on time interpolators.
 tipar.txt
diff --git a/Documentation/laptops/00-INDEX b/Documentation/laptops/00-INDEX
new file mode 100644
index 00000000000..729c2c062e1
--- /dev/null
+++ b/Documentation/laptops/00-INDEX
@@ -0,0 +1,10 @@
+00-INDEX
+	- This file
+acer-wmi.txt
+	- information on the Acer Laptop WMI Extras driver.
+sony-laptop.txt
+	- Sony Notebook Control Driver (SNC) Readme.
+sonypi.txt
+	- info on Linux Sony Programmable I/O Device support.
+thinkpad-acpi.txt
+	- information on the (IBM and Lenovo) ThinkPad ACPI Extras driver.
diff --git a/Documentation/laptops/acer-wmi.txt b/Documentation/laptops/acer-wmi.txt
new file mode 100644
index 00000000000..b06696329cf
--- /dev/null
+++ b/Documentation/laptops/acer-wmi.txt
@@ -0,0 +1,202 @@
+Acer Laptop WMI Extras Driver
+http://code.google.com/p/aceracpi
+Version 0.1
+9th February 2008
+
+Copyright 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
+
+acer-wmi is a driver to allow you to control various parts of your Acer laptop
+hardware under Linux which are exposed via ACPI-WMI.
+
+This driver completely replaces the old out-of-tree acer_acpi, which I am
+currently maintaining for bug fixes only on pre-2.6.25 kernels. All development
+work is now focused solely on acer-wmi.
+
+Disclaimer
+**********
+
+Acer and Wistron have provided nothing towards the development acer_acpi or
+acer-wmi. All information we have has been through the efforts of the developers
+and the users to discover as much as possible about the hardware.
+
+As such, I do warn that this could break your hardware - this is extremely
+unlikely of course, but please bear this in mind.
+
+Background
+**********
+
+acer-wmi is derived from acer_acpi, originally developed by Mark
+Smith in 2005, then taken over by Carlos Corbacho in 2007, in order to activate
+the wireless LAN card under a 64-bit version of Linux, as acerhk[1] (the
+previous solution to the problem) relied on making 32 bit BIOS calls which are
+not possible in kernel space from a 64 bit OS.
+
+[1] acerhk: http://www.cakey.de/acerhk/
+
+Supported Hardware
+******************
+
+Please see the website for the current list of known working hardare:
+
+http://code.google.com/p/aceracpi/wiki/SupportedHardware
+
+If your laptop is not listed, or listed as unknown, and works with acer-wmi,
+please contact me with a copy of the DSDT.
+
+If your Acer laptop doesn't work with acer-wmi, I would also like to see the
+DSDT.
+
+To send me the DSDT, as root/sudo:
+
+cat /sys/firmware/acpi/DSDT > dsdt
+
+And send me the resulting 'dsdt' file.
+
+Usage
+*****
+
+On Acer laptops, acer-wmi should already be autoloaded based on DMI matching.
+For non-Acer laptops, until WMI based autoloading support is added, you will
+need to manually load acer-wmi.
+
+acer-wmi creates /sys/devices/platform/acer-wmi, and fills it with various
+files whose usage is detailed below, which enables you to control some of the
+following (varies between models):
+
+* the wireless LAN card radio
+* inbuilt Bluetooth adapter
+* inbuilt 3G card
+* mail LED of your laptop
+* brightness of the LCD panel
+
+Wireless
+********
+
+With regards to wireless, all acer-wmi does is enable the radio on the card. It
+is not responsible for the wireless LED - once the radio is enabled, this is
+down to the wireless driver for your card. So the behaviour of the wireless LED,
+once you enable the radio, will depend on your hardware and driver combination.
+
+e.g. With the BCM4318 on the Acer Aspire 5020 series:
+
+ndiswrapper: Light blinks on when transmitting
+bcm43xx/b43: Solid light, blinks off when transmitting
+
+Wireless radio control is unconditionally enabled - all Acer laptops that support
+acer-wmi come with built-in wireless. However, should you feel so inclined to
+ever wish to remove the card, or swap it out at some point, please get in touch
+with me, as we may well be able to gain some data on wireless card detection.
+
+To read the status of the wireless radio (0=off, 1=on):
+cat /sys/devices/platform/acer-wmi/wireless
+
+To enable the wireless radio:
+echo 1 > /sys/devices/platform/acer-wmi/wireless
+
+To disable the wireless radio:
+echo 0 > /sys/devices/platform/acer-wmi/wireless
+
+To set the state of the wireless radio when loading acer-wmi, pass:
+wireless=X (where X is 0 or 1)
+
+Bluetooth
+*********
+
+For bluetooth, this is an internal USB dongle, so once enabled, you will get
+a USB device connection event, and a new USB device appears. When you disable
+bluetooth, you get the reverse - a USB device disconnect event, followed by the
+device disappearing again.
+
+Bluetooth is autodetected by acer-wmi, so if you do not have a bluetooth module
+installed in your laptop, this file won't exist (please be aware that it is
+quite common for Acer not to fit bluetooth to their laptops - so just because
+you have a bluetooth button on the laptop, doesn't mean that bluetooth is
+installed).
+
+For the adventurously minded - if you want to buy an internal bluetooth
+module off the internet that is compatible with your laptop and fit it, then
+it will work just fine with acer-wmi.
+
+To read the status of the bluetooth module (0=off, 1=on):
+cat /sys/devices/platform/acer-wmi/wireless
+
+To enable the bluetooth module:
+echo 1 > /sys/devices/platform/acer-wmi/bluetooth
+
+To disable the bluetooth module:
+echo 0 > /sys/devices/platform/acer-wmi/bluetooth
+
+To set the state of the bluetooth module when loading acer-wmi, pass:
+bluetooth=X (where X is 0 or 1)
+
+3G
+**
+
+3G is currently not autodetected, so the 'threeg' file is always created under
+sysfs. So far, no-one in possession of an Acer laptop with 3G built-in appears to
+have tried Linux, or reported back, so we don't have any information on this.
+
+If you have an Acer laptop that does have a 3G card in, please contact me so we
+can properly detect these, and find out a bit more about them.
+
+To read the status of the 3G card (0=off, 1=on):
+cat /sys/devices/platform/acer-wmi/threeg
+
+To enable the 3G card:
+echo 1 > /sys/devices/platform/acer-wmi/threeg
+
+To disable the 3G card:
+echo 0 > /sys/devices/platform/acer-wmi/threeg
+
+To set the state of the 3G card when loading acer-wmi, pass:
+threeg=X (where X is 0 or 1)
+
+Mail LED
+********
+
+This can be found in most older Acer laptops supported by acer-wmi, and many
+newer ones - it is built into the 'mail' button, and blinks when active.
+
+On newer (WMID) laptops though, we have no way of detecting the mail LED. If
+your laptop identifies itself in dmesg as a WMID model, then please try loading
+acer_acpi with:
+
+force_series=2490
+
+This will use a known alternative method of reading/ writing the mail LED. If
+it works, please report back to me with the DMI data from your laptop so this
+can be added to acer-wmi.
+
+The LED is exposed through the LED subsystem, and can be found in:
+
+/sys/devices/platform/acer-wmi/leds/acer-mail:green/
+
+The mail LED is autodetected, so if you don't have one, the LED device won't
+be registered.
+
+If you have a mail LED that is not green, please report this to me.
+
+Backlight
+*********
+
+The backlight brightness control is available on all acer-wmi supported
+hardware. The maximum brightness level is usually 15, but on some newer laptops
+it's 10 (this is again autodetected).
+
+The backlight is exposed through the backlight subsystem, and can be found in:
+
+/sys/devices/platform/acer-wmi/backlight/acer-wmi/
+
+Credits
+*******
+
+Olaf Tauber, who did the real hard work when he developed acerhk
+http://www.informatik.hu-berlin.de/~tauber/acerhk
+All the authors of laptop ACPI modules in the kernel, whose work
+was an inspiration in the early days of acer_acpi
+Mathieu Segaud, who solved the problem with having to modprobe the driver
+twice in acer_acpi 0.2.
+Jim Ramsay, who added support for the WMID interface
+Mark Smith, who started the original acer_acpi
+
+And the many people who have used both acer_acpi and acer-wmi.
diff --git a/Documentation/sony-laptop.txt b/Documentation/laptops/sony-laptop.txt
index 7a5c1a81905..8b2bc1572d9 100644
--- a/Documentation/sony-laptop.txt
+++ b/Documentation/laptops/sony-laptop.txt
@@ -114,4 +114,3 @@ Bugs/Limitations:
   sonypi driver (through /dev/sonypi) does not try to use the
   sony-laptop driver. In the future, spicctrl could try sonypi first,
   and if it isn't present, try sony-laptop instead.
-
diff --git a/Documentation/sonypi.txt b/Documentation/laptops/sonypi.txt
index 4857acfc50f..4857acfc50f 100644
--- a/Documentation/sonypi.txt
+++ b/Documentation/laptops/sonypi.txt
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 6c2477754a2..6c2477754a2 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 65a70b777c1..a64d532dff4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -102,6 +102,9 @@ config ARCH_HAS_ILOG2_U32
 config ARCH_HAS_ILOG2_U64
 	def_bool n
 
+config ARCH_HAS_CPU_IDLE_WAIT
+	def_bool y
+
 config GENERIC_CALIBRATE_DELAY
 	def_bool y
 
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index f29812a8653..40b0fcae4c7 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -60,5 +60,5 @@ obj-$(CONFIG_ACPI_ASUS)		+= asus_acpi.o
 obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
 obj-$(CONFIG_ACPI_HOTPLUG_MEMORY)	+= acpi_memhotplug.o
 obj-$(CONFIG_ACPI_PROCFS_POWER)	+= cm_sbs.o
-obj-$(CONFIG_ACPI_SBS)		+= sbs.o
 obj-$(CONFIG_ACPI_SBS)		+= sbshc.o
+obj-$(CONFIG_ACPI_SBS)		+= sbs.o
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 1194105cc3c..585ae3c9c8e 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -827,7 +827,7 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id)
 #endif
 	printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
 	       ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
-	       battery->name, sbs->battery->present ? "present" : "absent");
+	       battery->name, battery->present ? "present" : "absent");
 	return result;
 }
 
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index ae9a90438e2..a2cf3008ce6 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -117,6 +117,11 @@ static int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol,
 	int ret = -EFAULT, i;
 	u8 temp, sz = 0;
 
+	if (!hc) {
+		printk(KERN_ERR PREFIX "host controller is not configured\n");
+		return ret;
+	}
+
 	mutex_lock(&hc->lock);
 	if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))
 		goto end;
@@ -292,6 +297,7 @@ static int acpi_smbus_hc_remove(struct acpi_device *device, int type)
 	hc = acpi_driver_data(device);
 	acpi_ec_remove_query_handler(hc->ec, hc->query_bit);
 	kfree(hc);
+	acpi_driver_data(device) = NULL;
 	return 0;
 }
 
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index f01ac9a07bf..47c6be84fc8 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -875,7 +875,7 @@ config SONYPI
 	  Device which can be found in many (all ?) Sony Vaio laptops.
 
 	  If you have one of those laptops, read
-	  <file:Documentation/sonypi.txt>, and say Y or M here.
+	  <file:Documentation/laptops/sonypi.txt>, and say Y or M here.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called sonypi.
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 2c4b2d47973..60f71e6345e 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -27,6 +27,17 @@ static void (*pm_idle_old)(void);
 
 static int enabled_devices;
 
+#if defined(CONFIG_ARCH_HAS_CPU_IDLE_WAIT)
+static void cpuidle_kick_cpus(void)
+{
+	cpu_idle_wait();
+}
+#elif defined(CONFIG_SMP)
+# error "Arch needs cpu_idle_wait() equivalent here"
+#else /* !CONFIG_ARCH_HAS_CPU_IDLE_WAIT && !CONFIG_SMP */
+static void cpuidle_kick_cpus(void) {}
+#endif
+
 /**
  * cpuidle_idle_call - the main idle loop
  *
@@ -83,7 +94,7 @@ void cpuidle_uninstall_idle_handler(void)
 {
 	if (enabled_devices && (pm_idle != pm_idle_old)) {
 		pm_idle = pm_idle_old;
-		cpu_idle_wait();
+		cpuidle_kick_cpus();
 	}
 }
 
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index c143a86c2ea..1abc95ca9df 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -114,6 +114,9 @@ config ACER_WMI
 	  wireless radio and bluetooth control, and on some laptops,
 	  exposes the mail LED and LCD backlight.
 
+	  For more information about this driver see
+	  <file:Documentation/laptops/acer-wmi.txt>
+
 	  If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
 	  here.
 
@@ -152,8 +155,9 @@ config FUJITSU_LAPTOP
 	  If you have a Fujitsu laptop, say Y or M here.
 
 config TC1100_WMI
-	tristate "HP Compaq TC1100 Tablet WMI Extras"
+	tristate "HP Compaq TC1100 Tablet WMI Extras (EXPERIMENTAL)"
 	depends on X86 && !X86_64
+	depends on EXPERIMENTAL
 	depends on ACPI
 	select ACPI_WMI
 	---help---
@@ -192,7 +196,7 @@ config SONY_LAPTOP
 	  screen brightness control, Fn keys and allows powering on/off some
 	  devices.
 
-	  Read <file:Documentation/sony-laptop.txt> for more information.
+	  Read <file:Documentation/laptops/sony-laptop.txt> for more information.
 
 config SONYPI_COMPAT
 	bool "Sonypi compatibility"
@@ -211,8 +215,9 @@ config THINKPAD_ACPI
 	  This is a driver for the IBM and Lenovo ThinkPad laptops. It adds
 	  support for Fn-Fx key combinations, Bluetooth control, video
 	  output switching, ThinkLight control, UltraBay eject and more.
-	  For more information about this driver see 
-	  <file:Documentation/thinkpad-acpi.txt> and <http://ibm-acpi.sf.net/> .
+	  For more information about this driver see
+	  <file:Documentation/laptops/thinkpad-acpi.txt> and
+	  <http://ibm-acpi.sf.net/> .
 
 	  This driver was formerly known as ibm-acpi.
 
diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
index a4d67750425..d7aea93081f 100644
--- a/drivers/misc/acer-wmi.c
+++ b/drivers/misc/acer-wmi.c
@@ -428,11 +428,9 @@ static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 		if (value > max_brightness)
 			return AE_BAD_PARAMETER;
 		switch (quirks->brightness) {
-		case 1:
-			return ec_write(0x83, value);
 		default:
-			return AE_BAD_ADDRESS;
-		break;
+			return ec_write(0x83, value);
+			break;
 		}
 	default:
 		return AE_BAD_ADDRESS;
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index bba7712cadc..818ca1cf0b6 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -79,7 +79,9 @@ struct thermal_zone_device {
 };
 
 struct thermal_zone_device *thermal_zone_device_register(char *, int, void *,
-					struct thermal_zone_device_ops *);
+							 struct
+							 thermal_zone_device_ops
+							 *);
 void thermal_zone_device_unregister(struct thermal_zone_device *);
 
 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
@@ -87,8 +89,23 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 				       struct thermal_cooling_device *);
 
+#ifdef	CONFIG_THERMAL
 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
-					struct thermal_cooling_device_ops *);
+							       struct
+							       thermal_cooling_device_ops
+							       *);
 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
+#else
+static inline struct thermal_cooling_device
+*thermal_cooling_device_register(char *c, void *v,
+				 struct thermal_cooling_device_ops *t)
+{
+	return NULL;
+}
+static inline
+    void thermal_cooling_device_unregister(struct thermal_cooling_device *t)
+{
+};
+#endif
 
-#endif				/* __THERMAL_H__ */
+#endif /* __THERMAL_H__ */