Merge tag 'driver-core-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg Kroah-Hartman:
 "Here's the driver core, and other driver subsystems, pull request for
  the 3.5-rc1 merge window.

  Outside of a few minor driver core changes, we ended up with the
  following different subsystem and core changes as well, due to
  interdependancies on the driver core:
   - hyperv driver updates
   - drivers/memory being created and some drivers moved into it
   - extcon driver subsystem created out of the old Android staging
     switch driver code
   - dynamic debug updates
   - printk rework, and /dev/kmsg changes

  All of this has been tested in the linux-next releases for a few weeks
  with no reported problems.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fix up conflicts in drivers/extcon/extcon-max8997.c where git noticed
that a patch to the deleted drivers/misc/max8997-muic.c driver needs to
be applied to this one.

* tag 'driver-core-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (90 commits)
  uio_pdrv_genirq: get irq through platform resource if not set otherwise
  memory: tegra{20,30}-mc: Remove empty *_remove()
  printk() - isolate KERN_CONT users from ordinary complete lines
  sysfs: get rid of some lockdep false positives
  Drivers: hv: util: Properly handle version negotiations.
  Drivers: hv: Get rid of an unnecessary check in vmbus_prep_negotiate_resp()
  memory: tegra{20,30}-mc: Use dev_err_ratelimited()
  driver core: Add dev_*_ratelimited() family
  Driver Core: don't oops with unregistered driver in driver_find_device()
  printk() - restore prefix/timestamp printing for multi-newline strings
  printk: add stub for prepend_timestamp()
  ARM: tegra30: Make MC optional in Kconfig
  ARM: tegra20: Make MC optional in Kconfig
  ARM: tegra30: MC: Remove unnecessary BUG*()
  ARM: tegra20: MC: Remove unnecessary BUG*()
  printk: correctly align __log_buf
  ARM: tegra30: Add Tegra Memory Controller(MC) driver
  ARM: tegra20: Add Tegra Memory Controller(MC) driver
  printk() - restore timestamp printing at console output
  printk() - do not merge continuation lines of different threads
  ...

2 files changed, 187 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/dev-kmsg b/Documentation/ABI/testing/dev-kmsg
new file mode 100644
index 000000000000..281ecc5f9709
--- /dev/null
+++ b/Documentation/ABI/testing/dev-kmsg
@@ -0,0 +1,90 @@
+What:           /dev/kmsg
+Date:           Mai 2012
+KernelVersion:  3.5
+Contact:        Kay Sievers <kay@vrfy.org>
+Description:    The /dev/kmsg character device node provides userspace access
+                to the kernel's printk buffer.
+
+                Injecting messages:
+                Every write() to the opened device node places a log entry in
+                the kernel's printk buffer.
+
+                The logged line can be prefixed with a <N> syslog prefix, which
+                carries the syslog priority and facility. The single decimal
+                prefix number is composed of the 3 lowest bits being the syslog
+                priority and the higher bits the syslog facility number.
+
+                If no prefix is given, the priority number is the default kernel
+                log priority and the facility number is set to LOG_USER (1). It
+                is not possible to inject messages from userspace with the
+                facility number LOG_KERN (0), to make sure that the origin of
+                the messages can always be reliably determined.
+
+                Accessing the buffer:
+                Every read() from the opened device node receives one record
+                of the kernel's printk buffer.
+
+                The first read() directly following an open() always returns
+                first message in the buffer; there is no kernel-internal
+                persistent state; many readers can concurrently open the device
+                and read from it, without affecting other readers.
+
+                Every read() will receive the next available record. If no more
+                records are available read() will block, or if O_NONBLOCK is
+                used -EAGAIN returned.
+
+                Messages in the record ring buffer get overwritten as whole,
+                there are never partial messages received by read().
+
+                In case messages get overwritten in the circular buffer while
+                the device is kept open, the next read() will return -EPIPE,
+                and the seek position be updated to the next available record.
+                Subsequent reads() will return available records again.
+
+                Unlike the classic syslog() interface, the 64 bit record
+                sequence numbers allow to calculate the amount of lost
+                messages, in case the buffer gets overwritten. And they allow
+                to reconnect to the buffer and reconstruct the read position
+                if needed, without limiting the interface to a single reader.
+
+                The device supports seek with the following parameters:
+                SEEK_SET, 0
+                  seek to the first entry in the buffer
+                SEEK_END, 0
+                  seek after the last entry in the buffer
+                SEEK_DATA, 0
+                  seek after the last record available at the time
+                  the last SYSLOG_ACTION_CLEAR was issued.
+
+                The output format consists of a prefix carrying the syslog
+                prefix including priority and facility, the 64 bit message
+                sequence number and the monotonic timestamp in microseconds.
+                The values are separated by a ','. Future extensions might
+                add more comma separated values before the terminating ';'.
+                Unknown values should be gracefully ignored.
+
+                The human readable text string starts directly after the ';'
+                and is terminated by a '\n'. Untrusted values derived from
+                hardware or other facilities are printed, therefore
+                all non-printable characters in the log message are escaped
+                by "\x00" C-style hex encoding.
+
+                A line starting with ' ', is a continuation line, adding
+                key/value pairs to the log message, which provide the machine
+                readable context of the message, for reliable processing in
+                userspace.
+
+                Example:
+                7,160,424069;pci_root PNP0A03:00: host bridge window [io  0x0000-0x0cf7] (ignored)
+                 SUBSYSTEM=acpi
+                 DEVICE=+acpi:PNP0A03:00
+                6,339,5140900;NET: Registered protocol family 10
+                30,340,5690716;udevd[80]: starting version 181
+
+                The DEVICE= key uniquely identifies devices the following way:
+                  b12:8        - block dev_t
+                  c127:3       - char dev_t
+                  n8           - netdev ifindex
+                  +sound:card0 - subsystem:devname
+
+Users:          dmesg(1), userspace kernel log consumers
diff --git a/Documentation/ABI/testing/sysfs-class-extcon b/Documentation/ABI/testing/sysfs-class-extcon
new file mode 100644
index 000000000000..20ab361bd8c6
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-extcon
@@ -0,0 +1,97 @@
+What:           /sys/class/extcon/.../
+Date:           February 2012
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                Provide a place in sysfs for the extcon objects.
+                This allows accessing extcon specific variables.
+                The name of extcon object denoted as ... is the name given
+                with extcon_dev_register.
+
+                One extcon device denotes a single external connector
+                port. An external connector may have multiple cables
+                attached simultaneously. Many of docks, cradles, and
+                accessory cables have such capability. For example,
+                the 30-pin port of Nuri board (/arch/arm/mach-exynos)
+                may have both HDMI and Charger attached, or analog audio,
+                video, and USB cables attached simulteneously.
+
+                If there are cables mutually exclusive with each other,
+                such binary relations may be expressed with extcon_dev's
+                mutually_exclusive array.
+
+What:           /sys/class/extcon/.../name
+Date:           February 2012
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                The /sys/class/extcon/.../name shows the name of the extcon
+                object. If the extcon object has an optional callback
+                "show_name" defined, the callback will provide the name with
+                this sysfs node.
+
+What:           /sys/class/extcon/.../state
+Date:           February 2012
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                The /sys/class/extcon/.../state shows and stores the cable
+                attach/detach information of the corresponding extcon object.
+                If the extcon object has an optional callback "show_state"
+                defined, the showing function is overriden with the optional
+                callback.
+
+                If the default callback for showing function is used, the
+                format is like this:
+                # cat state
+                USB_OTG=1
+                HDMI=0
+                TA=1
+                EAR_JACK=0
+                #
+                In this example, the extcon device have USB_OTG and TA
+                cables attached and HDMI and EAR_JACK cables detached.
+
+                In order to update the state of an extcon device, enter a hex
+                state number starting with 0x.
+                 echo 0xHEX > state
+
+                This updates the whole state of the extcon dev.
+                Inputs of all the methods are required to meet the
+                mutually_exclusive contidions if they exist.
+
+                It is recommended to use this "global" state interface if
+                you need to enter the value atomically. The later state
+                interface associated with each cable cannot update
+                multiple cable states of an extcon device simultaneously.
+
+What:           /sys/class/extcon/.../cable.x/name
+Date:           February 2012
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                The /sys/class/extcon/.../cable.x/name shows the name of cable
+                "x" (integer between 0 and 31) of an extcon device.
+
+What:           /sys/class/extcon/.../cable.x/state
+Date:           February 2012
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                The /sys/class/extcon/.../cable.x/name shows and stores the
+                state of cable "x" (integer between 0 and 31) of an extcon
+                device. The state value is either 0 (detached) or 1
+                (attached).
+
+What:           /sys/class/extcon/.../mutually_exclusive/...
+Date:           December 2011
+Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
+Description:
+                Shows the relations of mutually exclusiveness. For example,
+                if the mutually_exclusive array of extcon_dev is
+                {0x3, 0x5, 0xC, 0x0}, the, the output is:
+                # ls mutually_exclusive/
+                0x3
+                0x5
+                0xc
+                #
+
+                Note that mutually_exclusive is a sub-directory of the extcon
+                device and the file names under the mutually_exclusive
+                directory show the mutually-exclusive sets, not the contents
+                of the files.