Merge branch 'master' into for-linus

28 files changed, 1353 insertions, 96 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 6bf68053e4b..25be3250f7d 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -84,6 +84,16 @@ Description:
 		from this part of the device tree.
 		Depends on CONFIG_HOTPLUG.
 
+What:		/sys/bus/pci/devices/.../reset
+Date:		July 2009
+Contact:	Michael S. Tsirkin <mst@redhat.com>
+Description:
+		Some devices allow an individual function to be reset
+		without affecting other functions in the same device.
+		For devices that have this support, a file named reset
+		will be present in sysfs.  Writing 1 to this file
+		will perform reset.
+
 What:		/sys/bus/pci/devices/.../vpd
 Date:		February 2008
 Contact:	Ben Hutchings <bhutchings@solarflare.com>
diff --git a/Documentation/DocBook/uio-howto.tmpl b/Documentation/DocBook/uio-howto.tmpl
index 8f6e3b2403c..4d4ce0e61e4 100644
--- a/Documentation/DocBook/uio-howto.tmpl
+++ b/Documentation/DocBook/uio-howto.tmpl
@@ -25,6 +25,10 @@
 	<year>2006-2008</year>
 	<holder>Hans-Jürgen Koch.</holder>
 </copyright>
+<copyright>
+	<year>2009</year>
+	<holder>Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)</holder>
+</copyright>
 
 <legalnotice>
 <para>
@@ -42,6 +46,13 @@ GPL version 2.
 
 <revhistory>
 	<revision>
+	<revnumber>0.9</revnumber>
+	<date>2009-07-16</date>
+	<authorinitials>mst</authorinitials>
+	<revremark>Added generic pci driver
+		</revremark>
+	</revision>
+	<revision>
 	<revnumber>0.8</revnumber>
 	<date>2008-12-24</date>
 	<authorinitials>hjk</authorinitials>
@@ -809,6 +820,158 @@ framework to set up sysfs files for this region. Simply leave it alone.
 
 </chapter>
 
+<chapter id="uio_pci_generic" xreflabel="Using Generic driver for PCI cards">
+<?dbhtml filename="uio_pci_generic.html"?>
+<title>Generic PCI UIO driver</title>
+	<para>
+	The generic driver is a kernel module named uio_pci_generic.
+	It can work with any device compliant to PCI 2.3 (circa 2002) and
+	any compliant PCI Express device. Using this, you only need to
+        write the userspace driver, removing the need to write
+        a hardware-specific kernel module.
+	</para>
+
+<sect1 id="uio_pci_generic_binding">
+<title>Making the driver recognize the device</title>
+	<para>
+Since the driver does not declare any device ids, it will not get loaded
+automatically and will not automatically bind to any devices, you must load it
+and allocate id to the driver yourself. For example:
+	<programlisting>
+ modprobe uio_pci_generic
+ echo &quot;8086 10f5&quot; &gt; /sys/bus/pci/drivers/uio_pci_generic/new_id
+	</programlisting>
+	</para>
+	<para>
+If there already is a hardware specific kernel driver for your device, the
+generic driver still won't bind to it, in this case if you want to use the
+generic driver (why would you?) you'll have to manually unbind the hardware
+specific driver and bind the generic driver, like this:
+	<programlisting>
+    echo -n 0000:00:19.0 &gt; /sys/bus/pci/drivers/e1000e/unbind
+    echo -n 0000:00:19.0 &gt; /sys/bus/pci/drivers/uio_pci_generic/bind
+	</programlisting>
+	</para>
+	<para>
+You can verify that the device has been bound to the driver
+by looking for it in sysfs, for example like the following:
+	<programlisting>
+    ls -l /sys/bus/pci/devices/0000:00:19.0/driver
+	</programlisting>
+Which if successful should print
+	<programlisting>
+  .../0000:00:19.0/driver -&gt; ../../../bus/pci/drivers/uio_pci_generic
+	</programlisting>
+Note that the generic driver will not bind to old PCI 2.2 devices.
+If binding the device failed, run the following command:
+	<programlisting>
+  dmesg
+	</programlisting>
+and look in the output for failure reasons
+	</para>
+</sect1>
+
+<sect1 id="uio_pci_generic_internals">
+<title>Things to know about uio_pci_generic</title>
+	<para>
+Interrupts are handled using the Interrupt Disable bit in the PCI command
+register and Interrupt Status bit in the PCI status register.  All devices
+compliant to PCI 2.3 (circa 2002) and all compliant PCI Express devices should
+support these bits.  uio_pci_generic detects this support, and won't bind to
+devices which do not support the Interrupt Disable Bit in the command register.
+	</para>
+	<para>
+On each interrupt, uio_pci_generic sets the Interrupt Disable bit.
+This prevents the device from generating further interrupts
+until the bit is cleared. The userspace driver should clear this
+bit before blocking and waiting for more interrupts.
+	</para>
+</sect1>
+<sect1 id="uio_pci_generic_userspace">
+<title>Writing userspace driver using uio_pci_generic</title>
+	<para>
+Userspace driver can use pci sysfs interface, or the
+libpci libray that wraps it, to talk to the device and to
+re-enable interrupts by writing to the command register.
+	</para>
+</sect1>
+<sect1 id="uio_pci_generic_example">
+<title>Example code using uio_pci_generic</title>
+	<para>
+Here is some sample userspace driver code using uio_pci_generic:
+<programlisting>
+#include &lt;stdlib.h&gt;
+#include &lt;stdio.h&gt;
+#include &lt;unistd.h&gt;
+#include &lt;sys/types.h&gt;
+#include &lt;sys/stat.h&gt;
+#include &lt;fcntl.h&gt;
+#include &lt;errno.h&gt;
+
+int main()
+{
+	int uiofd;
+	int configfd;
+	int err;
+	int i;
+	unsigned icount;
+	unsigned char command_high;
+
+	uiofd = open(&quot;/dev/uio0&quot;, O_RDONLY);
+	if (uiofd &lt; 0) {
+		perror(&quot;uio open:&quot;);
+		return errno;
+	}
+	configfd = open(&quot;/sys/class/uio/uio0/device/config&quot;, O_RDWR);
+	if (uiofd &lt; 0) {
+		perror(&quot;config open:&quot;);
+		return errno;
+	}
+
+	/* Read and cache command value */
+	err = pread(configfd, &amp;command_high, 1, 5);
+	if (err != 1) {
+		perror(&quot;command config read:&quot;);
+		return errno;
+	}
+	command_high &amp;= ~0x4;
+
+	for(i = 0;; ++i) {
+		/* Print out a message, for debugging. */
+		if (i == 0)
+			fprintf(stderr, &quot;Started uio test driver.\n&quot;);
+		else
+			fprintf(stderr, &quot;Interrupts: %d\n&quot;, icount);
+
+		/****************************************/
+		/* Here we got an interrupt from the
+		   device. Do something to it. */
+		/****************************************/
+
+		/* Re-enable interrupts. */
+		err = pwrite(configfd, &amp;command_high, 1, 5);
+		if (err != 1) {
+			perror(&quot;config write:&quot;);
+			break;
+		}
+
+		/* Wait for next interrupt. */
+		err = read(uiofd, &amp;icount, 4);
+		if (err != 4) {
+			perror(&quot;uio read:&quot;);
+			break;
+		}
+
+	}
+	return errno;
+}
+
+</programlisting>
+	</para>
+</sect1>
+
+</chapter>
+
 <appendix id="app1">
 <title>Further information</title>
 <itemizedlist>
diff --git a/Documentation/PCI/pci-error-recovery.txt b/Documentation/PCI/pci-error-recovery.txt
index 6650af43252..e83f2ea7641 100644
--- a/Documentation/PCI/pci-error-recovery.txt
+++ b/Documentation/PCI/pci-error-recovery.txt
@@ -4,15 +4,17 @@
                         February 2, 2006
 
                  Current document maintainer:
-             Linas Vepstas <linas@austin.ibm.com>
+             Linas Vepstas <linasvepstas@gmail.com>
+          updated by Richard Lary <rlary@us.ibm.com>
+       and Mike Mason <mmlnx@us.ibm.com> on 27-Jul-2009
 
 
 Many PCI bus controllers are able to detect a variety of hardware
 PCI errors on the bus, such as parity errors on the data and address
 busses, as well as SERR and PERR errors.  Some of the more advanced
 chipsets are able to deal with these errors; these include PCI-E chipsets,
-and the PCI-host bridges found on IBM Power4 and Power5-based pSeries
-boxes. A typical action taken is to disconnect the affected device,
+and the PCI-host bridges found on IBM Power4, Power5 and Power6-based
+pSeries boxes. A typical action taken is to disconnect the affected device,
 halting all I/O to it.  The goal of a disconnection is to avoid system
 corruption; for example, to halt system memory corruption due to DMA's
 to "wild" addresses. Typically, a reconnection mechanism is also
@@ -37,10 +39,11 @@ is forced by the need to handle multi-function devices, that is,
 devices that have multiple device drivers associated with them.
 In the first stage, each driver is allowed to indicate what type
 of reset it desires, the choices being a simple re-enabling of I/O
-or requesting a hard reset (a full electrical #RST of the PCI card).
-If any driver requests a full reset, that is what will be done.
+or requesting a slot reset.
 
-After a full reset and/or a re-enabling of I/O, all drivers are
+If any driver requests a slot reset, that is what will be done.
+
+After a reset and/or a re-enabling of I/O, all drivers are
 again notified, so that they may then perform any device setup/config
 that may be required.  After these have all completed, a final
 "resume normal operations" event is sent out.
@@ -101,7 +104,7 @@ if it implements any, it must implement error_detected(). If a callback
 is not implemented, the corresponding feature is considered unsupported.
 For example, if mmio_enabled() and resume() aren't there, then it
 is assumed that the driver is not doing any direct recovery and requires
-a reset. If link_reset() is not implemented, the card is assumed as
+a slot reset. If link_reset() is not implemented, the card is assumed to
 not care about link resets. Typically a driver will want to know about
 a slot_reset().
 
@@ -111,7 +114,7 @@ sequence described below.
 
 STEP 0: Error Event
 -------------------
-PCI bus error is detect by the PCI hardware.  On powerpc, the slot
+A PCI bus error is detected by the PCI hardware.  On powerpc, the slot
 is isolated, in that all I/O is blocked: all reads return 0xffffffff,
 all writes are ignored.
 
@@ -139,7 +142,7 @@ The driver must return one of the following result codes:
 		  a chance to extract some diagnostic information (see
 		  mmio_enable, below).
 		- PCI_ERS_RESULT_NEED_RESET:
-		  Driver returns this if it can't recover without a hard
+		  Driver returns this if it can't recover without a
 		  slot reset.
 		- PCI_ERS_RESULT_DISCONNECT:
 		  Driver returns this if it doesn't want to recover at all.
@@ -169,11 +172,11 @@ is STEP 6 (Permanent Failure).
 
 >>> The current powerpc implementation doesn't much care if the device
 >>> attempts I/O at this point, or not.  I/O's will fail, returning
->>> a value of 0xff on read, and writes will be dropped. If the device
->>> driver attempts more than 10K I/O's to a frozen adapter, it will
->>> assume that the device driver has gone into an infinite loop, and
->>> it will panic the kernel. There doesn't seem to be any other
->>> way of stopping a device driver that insists on spinning on I/O.
+>>> a value of 0xff on read, and writes will be dropped. If more than
+>>> EEH_MAX_FAILS I/O's are attempted to a frozen adapter, EEH
+>>> assumes that the device driver has gone into an infinite loop
+>>> and prints an error to syslog.  A reboot is then required to 
+>>> get the device working again.
 
 STEP 2: MMIO Enabled
 -------------------
@@ -182,15 +185,14 @@ DMA), and then calls the mmio_enabled() callback on all affected
 device drivers.
 
 This is the "early recovery" call. IOs are allowed again, but DMA is
-not (hrm... to be discussed, I prefer not), with some restrictions. This
-is NOT a callback for the driver to start operations again, only to
-peek/poke at the device, extract diagnostic information, if any, and
-eventually do things like trigger a device local reset or some such,
-but not restart operations. This is callback is made if all drivers on
-a segment agree that they can try to recover and if no automatic link reset
-was performed by the HW. If the platform can't just re-enable IOs without
-a slot reset or a link reset, it wont call this callback, and instead
-will have gone directly to STEP 3 (Link Reset) or STEP 4 (Slot Reset)
+not, with some restrictions. This is NOT a callback for the driver to
+start operations again, only to peek/poke at the device, extract diagnostic
+information, if any, and eventually do things like trigger a device local
+reset or some such, but not restart operations. This callback is made if
+all drivers on a segment agree that they can try to recover and if no automatic
+link reset was performed by the HW. If the platform can't just re-enable IOs
+without a slot reset or a link reset, it will not call this callback, and
+instead will have gone directly to STEP 3 (Link Reset) or STEP 4 (Slot Reset)
 
 >>> The following is proposed; no platform implements this yet:
 >>> Proposal: All I/O's should be done _synchronously_ from within
@@ -228,9 +230,6 @@ proceeds to either STEP3 (Link Reset) or to STEP 5 (Resume Operations).
 If any driver returned PCI_ERS_RESULT_NEED_RESET, then the platform
 proceeds to STEP 4 (Slot Reset)
 
->>> The current powerpc implementation does not implement this callback.
-
-
 STEP 3: Link Reset
 ------------------
 The platform resets the link, and then calls the link_reset() callback
@@ -253,16 +252,33 @@ The platform then proceeds to either STEP 4 (Slot Reset) or STEP 5
 
 >>> The current powerpc implementation does not implement this callback.
 
-
 STEP 4: Slot Reset
 ------------------
-The platform performs a soft or hard reset of the device, and then
-calls the slot_reset() callback.
 
-A soft reset consists of asserting the adapter #RST line and then
+In response to a return value of PCI_ERS_RESULT_NEED_RESET, the
+the platform will peform a slot reset on the requesting PCI device(s). 
+The actual steps taken by a platform to perform a slot reset
+will be platform-dependent. Upon completion of slot reset, the
+platform will call the device slot_reset() callback.
+
+Powerpc platforms implement two levels of slot reset:
+soft reset(default) and fundamental(optional) reset.
+
+Powerpc soft reset consists of asserting the adapter #RST line and then
 restoring the PCI BAR's and PCI configuration header to a state
 that is equivalent to what it would be after a fresh system
 power-on followed by power-on BIOS/system firmware initialization.
+Soft reset is also known as hot-reset.
+
+Powerpc fundamental reset is supported by PCI Express cards only
+and results in device's state machines, hardware logic, port states and
+configuration registers to initialize to their default conditions.
+
+For most PCI devices, a soft reset will be sufficient for recovery.
+Optional fundamental reset is provided to support a limited number
+of PCI Express PCI devices  for which a soft reset is not sufficient
+for recovery.
+
 If the platform supports PCI hotplug, then the reset might be
 performed by toggling the slot electrical power off/on.
 
@@ -274,10 +290,12 @@ may result in hung devices, kernel panics, or silent data corruption.
 
 This call gives drivers the chance to re-initialize the hardware
 (re-download firmware, etc.).  At this point, the driver may assume
-that he card is in a fresh state and is fully functional. In
-particular, interrupt generation should work normally.
+that the card is in a fresh state and is fully functional. The slot
+is unfrozen and the driver has full access to PCI config space,
+memory mapped I/O space and DMA. Interrupts (Legacy, MSI, or MSI-X)
+will also be available.
 
-Drivers should not yet restart normal I/O processing operations
+Drivers should not restart normal I/O processing operations
 at this point.  If all device drivers report success on this
 callback, the platform will call resume() to complete the sequence,
 and let the driver restart normal I/O processing.
@@ -302,11 +320,21 @@ driver performs device init only from PCI function 0:
 		- PCI_ERS_RESULT_DISCONNECT
 		Same as above.
 
+Drivers for PCI Express cards that require a fundamental reset must
+set the needs_freset bit in the pci_dev structure in their probe function.  
+For example, the QLogic qla2xxx driver sets the needs_freset bit for certain
+PCI card types:
+
++	/* Set EEH reset type to fundamental if required by hba  */
++	if (IS_QLA24XX(ha) || IS_QLA25XX(ha) || IS_QLA81XX(ha))
++		pdev->needs_freset = 1;
++
+
 Platform proceeds either to STEP 5 (Resume Operations) or STEP 6 (Permanent
 Failure).
 
->>> The current powerpc implementation does not currently try a
->>> power-cycle reset if the driver returned PCI_ERS_RESULT_DISCONNECT.
+>>> The current powerpc implementation does not try a power-cycle
+>>> reset if the driver returned PCI_ERS_RESULT_DISCONNECT.
 >>> However, it probably should.
 
 
@@ -348,7 +376,7 @@ software errors.
 
 Conclusion; General Remarks
 ---------------------------
-The way those callbacks are called is platform policy. A platform with
+The way the callbacks are called is platform policy. A platform with
 no slot reset capability may want to just "ignore" drivers that can't
 recover (disconnect them) and try to let other cards on the same segment
 recover. Keep in mind that in most real life cases, though, there will
@@ -361,8 +389,8 @@ That is, the recovery API only requires that:
 
  - There is no guarantee that interrupt delivery can proceed from any
 device on the segment starting from the error detection and until the
-resume callback is sent, at which point interrupts are expected to be
-fully operational.
+slot_reset callback is called, at which point interrupts are expected
+to be fully operational.
 
  - There is no guarantee that interrupt delivery is stopped, that is,
 a driver that gets an interrupt after detecting an error, or that detects
@@ -381,16 +409,23 @@ anyway :)
 >>> Implementation details for the powerpc platform are discussed in
 >>> the file Documentation/powerpc/eeh-pci-error-recovery.txt
 
->>> As of this writing, there are six device drivers with patches
->>> implementing error recovery. Not all of these patches are in
+>>> As of this writing, there is a growing list of device drivers with
+>>> patches implementing error recovery. Not all of these patches are in
 >>> mainline yet. These may be used as "examples":
 >>>
->>> drivers/scsi/ipr.c
->>> drivers/scsi/sym53cxx_2
+>>> drivers/scsi/ipr
+>>> drivers/scsi/sym53c8xx_2
+>>> drivers/scsi/qla2xxx
+>>> drivers/scsi/lpfc
+>>> drivers/next/bnx2.c
 >>> drivers/next/e100.c
 >>> drivers/net/e1000
+>>> drivers/net/e1000e
 >>> drivers/net/ixgb
+>>> drivers/net/ixgbe
+>>> drivers/net/cxgb3
 >>> drivers/net/s2io.c
+>>> drivers/net/qlge
 
 The End
 -------
diff --git a/Documentation/arm/SA1100/ADSBitsy b/Documentation/arm/SA1100/ADSBitsy
index ab47c383390..7197a9e958e 100644
--- a/Documentation/arm/SA1100/ADSBitsy
+++ b/Documentation/arm/SA1100/ADSBitsy
@@ -40,4 +40,4 @@ Notes:
   mode, the timing is off so the image is corrupted.  This will be
   fixed soon.
 
-Any contribution can be sent to nico@cam.org and will be greatly welcome!
+Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
diff --git a/Documentation/arm/SA1100/Assabet b/Documentation/arm/SA1100/Assabet
index 78bc1c1b04e..91f7ce7ba42 100644
--- a/Documentation/arm/SA1100/Assabet
+++ b/Documentation/arm/SA1100/Assabet
@@ -240,7 +240,7 @@ Then, rebooting the Assabet is just a matter of waiting for the login prompt.
 
 
 Nicolas Pitre
-nico@cam.org
+nico@fluxnic.net
 June 12, 2001
 
 
diff --git a/Documentation/arm/SA1100/Brutus b/Documentation/arm/SA1100/Brutus
index 2254c8f0b32..b1cfd405dcc 100644
--- a/Documentation/arm/SA1100/Brutus
+++ b/Documentation/arm/SA1100/Brutus
@@ -60,7 +60,7 @@ little modifications.
 
 Any contribution is welcome.
 
-Please send patches to nico@cam.org
+Please send patches to nico@fluxnic.net
 
 Have Fun !
 
diff --git a/Documentation/arm/SA1100/GraphicsClient b/Documentation/arm/SA1100/GraphicsClient
index 8fa7e8027ff..6c9c4f5a36e 100644
--- a/Documentation/arm/SA1100/GraphicsClient
+++ b/Documentation/arm/SA1100/GraphicsClient
@@ -4,7 +4,7 @@ For more details, contact Applied Data Systems or see
 http://www.applieddata.net/products.html
 
 The original Linux support for this product has been provided by 
-Nicolas Pitre <nico@cam.org>. Continued development work by
+Nicolas Pitre <nico@fluxnic.net>. Continued development work by
 Woojung Huh <whuh@applieddata.net>
 
 It's currently possible to mount a root filesystem via NFS providing a
@@ -94,5 +94,5 @@ Notes:
   mode, the timing is off so the image is corrupted.  This will be
   fixed soon.
 
-Any contribution can be sent to nico@cam.org and will be greatly welcome!
+Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
 
diff --git a/Documentation/arm/SA1100/GraphicsMaster b/Documentation/arm/SA1100/GraphicsMaster
index dd28745ac52..ee7c6595f23 100644
--- a/Documentation/arm/SA1100/GraphicsMaster
+++ b/Documentation/arm/SA1100/GraphicsMaster
@@ -4,7 +4,7 @@ For more details, contact Applied Data Systems or see
 http://www.applieddata.net/products.html
 
 The original Linux support for this product has been provided by
-Nicolas Pitre <nico@cam.org>. Continued development work by
+Nicolas Pitre <nico@fluxnic.net>. Continued development work by
 Woojung Huh <whuh@applieddata.net>
 
 Use 'make graphicsmaster_config' before any 'make config'.
@@ -50,4 +50,4 @@ Notes:
   mode, the timing is off so the image is corrupted.  This will be
   fixed soon.
 
-Any contribution can be sent to nico@cam.org and will be greatly welcome!
+Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
diff --git a/Documentation/arm/SA1100/Victor b/Documentation/arm/SA1100/Victor
index 01e81fc4946..f938a29fdc2 100644
--- a/Documentation/arm/SA1100/Victor
+++ b/Documentation/arm/SA1100/Victor
@@ -9,7 +9,7 @@ Of course Victor is using Linux as its main operating system.
 The Victor implementation for Linux is maintained by Nicolas Pitre:
 
 	nico@visuaide.com
-	nico@cam.org
+	nico@fluxnic.net
 
 For any comments, please feel free to contact me through the above
 addresses.
diff --git a/Documentation/dontdiff b/Documentation/dontdiff
index 88519daab6e..e1efc400bed 100644
--- a/Documentation/dontdiff
+++ b/Documentation/dontdiff
@@ -152,7 +152,6 @@ piggy.gz
 piggyback
 pnmtologo
 ppc_defs.h*
-promcon_tbl.c
 pss_boot.h
 qconf
 raid6altivec*.c
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 503d21216d5..fa75220f8d3 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -428,16 +428,6 @@ Who:	Johannes Berg <johannes@sipsolutions.net>
 
 ----------------------------
 
-What:	CONFIG_X86_OLD_MCE
-When:	2.6.32
-Why:	Remove the old legacy 32bit machine check code. This has been
-	superseded by the newer machine check code from the 64bit port,
-	but the old version has been kept around for easier testing. Note this
-	doesn't impact the old P5 and WinChip machine check handlers.
-Who:	Andi Kleen <andi@firstfloor.org>
-
-----------------------------
-
 What:	lock_policy_rwsem_* and unlock_policy_rwsem_* will not be
 	exported interface anymore.
 When:	2.6.33
diff --git a/Documentation/hwmon/pcf8591 b/Documentation/hwmon/pcf8591
index 5628fcf4207..e76a7892f68 100644
--- a/Documentation/hwmon/pcf8591
+++ b/Documentation/hwmon/pcf8591
@@ -2,11 +2,11 @@ Kernel driver pcf8591
 =====================
 
 Supported chips:
-  * Philips PCF8591
+  * Philips/NXP PCF8591
     Prefix: 'pcf8591'
     Addresses scanned: I2C 0x48 - 0x4f
-    Datasheet: Publicly available at the Philips Semiconductor website
-               http://www.semiconductors.philips.com/pip/PCF8591P.html
+    Datasheet: Publicly available at the NXP website
+               http://www.nxp.com/pip/PCF8591_6.html
 
 Authors:
         Aurelien Jarno <aurelien@aurel32.net>
@@ -16,9 +16,10 @@ Authors:
 
 Description
 -----------
+
 The PCF8591 is an 8-bit A/D and D/A converter (4 analog inputs and one
-analog output) for the I2C bus produced by Philips Semiconductors. It
-is designed to provide a byte I2C interface to up to 4 separate devices.
+analog output) for the I2C bus produced by Philips Semiconductors (now NXP).
+It is designed to provide a byte I2C interface to up to 4 separate devices.
 
 The PCF8591 has 4 analog inputs programmable as single-ended or
 differential inputs :
@@ -58,8 +59,8 @@ Accessing PCF8591 via /sys interface
 -------------------------------------
 
 ! Be careful !
-The PCF8591 is plainly impossible to detect ! Stupid chip.
-So every chip with address in the interval [48..4f] is
+The PCF8591 is plainly impossible to detect! Stupid chip.
+So every chip with address in the interval [0x48..0x4f] is
 detected as PCF8591. If you have other chips in this address
 range, the workaround is to load this module after the one
 for your others chips.
@@ -67,19 +68,20 @@ for your others chips.
 On detection (i.e. insmod, modprobe et al.), directories are being
 created for each detected PCF8591:
 
-/sys/bus/devices/<0>-<1>/
+/sys/bus/i2c/devices/<0>-<1>/
 where <0> is the bus the chip was detected on (e. g. i2c-0)
 and <1> the chip address ([48..4f])
 
 Inside these directories, there are such files:
-in0, in1, in2, in3, out0_enable, out0_output, name
+in0_input, in1_input, in2_input, in3_input, out0_enable, out0_output, name
 
 Name contains chip name.
 
-The in0, in1, in2 and in3 files are RO. Reading gives the value of the
-corresponding channel. Depending on the current analog inputs configuration,
-files in2 and/or in3 do not exist. Values range are from 0 to 255 for single
-ended inputs and -128 to +127 for differential inputs (8-bit ADC).
+The in0_input, in1_input, in2_input and in3_input files are RO. Reading gives
+the value of the corresponding channel. Depending on the current analog inputs
+configuration, files in2_input and in3_input may not exist. Values range
+from 0 to 255 for single ended inputs and -128 to +127 for differential inputs
+(8-bit ADC).
 
 The out0_enable file is RW. Reading gives "1" for analog output enabled and
 "0" for analog output disabled. Writing accepts "0" and "1" accordingly.
diff --git a/Documentation/hwmon/tmp421 b/Documentation/hwmon/tmp421
new file mode 100644
index 00000000000..0cf07f82474
--- /dev/null
+++ b/Documentation/hwmon/tmp421
@@ -0,0 +1,36 @@
+Kernel driver tmp421
+====================
+
+Supported chips:
+  * Texas Instruments TMP421
+    Prefix: 'tmp421'
+    Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
+    Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
+  * Texas Instruments TMP422
+    Prefix: 'tmp422'
+    Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
+    Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
+  * Texas Instruments TMP423
+    Prefix: 'tmp423'
+    Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
+    Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
+
+Authors:
+	Andre Prendel <andre.prendel@gmx.de>
+
+Description
+-----------
+
+This driver implements support for Texas Instruments TMP421, TMP422
+and TMP423 temperature sensor chips. These chips implement one local
+and up to one (TMP421), up to two (TMP422) or up to three (TMP423)
+remote sensors. Temperature is measured in degrees Celsius. The chips
+are wired over I2C/SMBus and specified over a temperature range of -40
+to +125 degrees Celsius. Resolution for both the local and remote
+channels is 0.0625 degree C.
+
+The chips support only temperature measurement. The driver exports
+the temperature values via the following sysfs files:
+
+temp[1-4]_input
+temp[2-4]_fault
diff --git a/Documentation/intel_txt.txt b/Documentation/intel_txt.txt
new file mode 100644
index 00000000000..f40a1f03001
--- /dev/null
+++ b/Documentation/intel_txt.txt
@@ -0,0 +1,210 @@
+Intel(R) TXT Overview:
+=====================
+
+Intel's technology for safer computing, Intel(R) Trusted Execution
+Technology (Intel(R) TXT), defines platform-level enhancements that
+provide the building blocks for creating trusted platforms.
+
+Intel TXT was formerly known by the code name LaGrande Technology (LT).