Merge branch 'master' into for-next (fb8231a8) · Commits · e / devices / android_kernel_xiaomi_markw

Documentation/ABI/testing/debugfs-kmemtrace

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	What: /sys/kernel/debug/kmemtrace/
	Date: July 2008
	Contact: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
	Description:

	In kmemtrace-enabled kernels, the following files are created:

	/sys/kernel/debug/kmemtrace/
	cpu<n> (0400) Per-CPU tracing data, see below. (binary)
	total_overruns (0400) Total number of bytes which were dropped from
	cpu<n> files because of full buffer condition,
	non-binary. (text)
	abi_version (0400) Kernel's kmemtrace ABI version. (text)

	Each per-CPU file should be read according to the relay interface. That is,
	the reader should set affinity to that specific CPU and, as currently done by
	the userspace application (though there are other methods), use poll() with
	an infinite timeout before every read(). Otherwise, erroneous data may be
	read. The binary data has the following _core_ format:

	Event ID (1 byte) Unsigned integer, one of:
	0 - represents an allocation (KMEMTRACE_EVENT_ALLOC)
	1 - represents a freeing of previously allocated memory
	(KMEMTRACE_EVENT_FREE)
	Type ID (1 byte) Unsigned integer, one of:
	0 - this is a kmalloc() / kfree()
	1 - this is a kmem_cache_alloc() / kmem_cache_free()
	2 - this is a __get_free_pages() et al.
	Event size (2 bytes) Unsigned integer representing the
	size of this event. Used to extend
	kmemtrace. Discard the bytes you
	don't know about.
	Sequence number (4 bytes) Signed integer used to reorder data
	logged on SMP machines. Wraparound
	must be taken into account, although
	it is unlikely.
	Caller address (8 bytes) Return address to the caller.
	Pointer to mem (8 bytes) Pointer to target memory area. Can be
	NULL, but not all such calls might be
	recorded.

	In case of KMEMTRACE_EVENT_ALLOC events, the next fields follow:

	Requested bytes (8 bytes) Total number of requested bytes,
	unsigned, must not be zero.
	Allocated bytes (8 bytes) Total number of actually allocated
	bytes, unsigned, must not be lower
	than requested bytes.
	Requested flags (4 bytes) GFP flags supplied by the caller.
	Target CPU (4 bytes) Signed integer, valid for event id 1.
	If equal to -1, target CPU is the same
	as origin CPU, but the reverse might
	not be true.

	The data is made available in the same endianness the machine has.

	Other event ids and type ids may be defined and added. Other fields may be
	added by increasing event size, but see below for details.
	Every modification to the ABI, including new id definitions, are followed
	by bumping the ABI version by one.

	Adding new data to the packet (features) is done at the end of the mandatory
	data:
	Feature size (2 byte)
	Feature ID (1 byte)
	Feature data (Feature size - 3 bytes)


	Users:
	kmemtrace-user - git://repo.or.cz/kmemtrace-user.git

Documentation/ABI/testing/sysfs-bus-i2c-devices-hm6352

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			Where: /sys/bus/i2c/devices/.../heading0_input
			Date: April 2010
			Kernel Version: 2.6.36?
			Contact: alan.cox@intel.com
			Description: Reports the current heading from the compass as a floating
			point value in degrees.

			Where: /sys/bus/i2c/devices/.../power_state
			Date: April 2010
			Kernel Version: 2.6.36?
			Contact: alan.cox@intel.com
			Description: Sets the power state of the device. 0 sets the device into
			sleep mode, 1 wakes it up.

			Where: /sys/bus/i2c/devices/.../calibration
			Date: April 2010
			Kernel Version: 2.6.36?
			Contact: alan.cox@intel.com
			Description: Sets the calibration on or off (1 = on, 0 = off). See the
			chip data sheet.

Documentation/ABI/testing/sysfs-bus-pci

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	@@ -139,3 +139,30 @@ Contact: linux-pci@vger.kernel.org
	Description:		Description:
	This symbolic link points to the PCI hotplug controller driver		This symbolic link points to the PCI hotplug controller driver
	module that manages the hotplug slot.		module that manages the hotplug slot.

			What: /sys/bus/pci/devices/.../label
			Date: July 2010
			Contact: Narendra K <narendra_k@dell.com>, linux-bugs@dell.com
			Description:
			Reading this attribute will provide the firmware
			given name(SMBIOS type 41 string) of the PCI device.
			The attribute will be created only if the firmware
			has given a name to the PCI device.
			Users:
			Userspace applications interested in knowing the
			firmware assigned name of the PCI device.

			What: /sys/bus/pci/devices/.../index
			Date: July 2010
			Contact: Narendra K <narendra_k@dell.com>, linux-bugs@dell.com
			Description:
			Reading this attribute will provide the firmware
			given instance(SMBIOS type 41 device type instance)
			of the PCI device. The attribute will be created
			only if the firmware has given a device type instance
			to the PCI device.
			Users:
			Userspace applications interested in knowing the
			firmware assigned device type instance of the PCI
			device that can help in understanding the firmware
			intended order of the PCI device.

Documentation/ABI/testing/sysfs-i2c-bmp085

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			What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input
			Date: June 2010
			Contact: Christoph Mair <christoph.mair@gmail.com>
			Description: Start a pressure measurement and read the result. Values
			represent the ambient air pressure in pascal (0.01 millibar).

			Reading: returns the current air pressure.


			What: /sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input
			Date: June 2010
			Contact: Christoph Mair <christoph.mair@gmail.com>
			Description: Measure the ambient temperature. The returned value represents
			the ambient temperature in units of 0.1 degree celsius.

			Reading: returns the current temperature.


			What: /sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling
			Date: June 2010
			Contact: Christoph Mair <christoph.mair@gmail.com>
			Description: Tell the bmp085 to use more samples to calculate a pressure
			value. When writing to this file the chip will use 2^x samples
			to calculate the next pressure value with x being the value
			written. Using this feature will decrease RMS noise and
			increase the measurement time.

			Reading: returns the current oversampling setting.

			Writing: sets a new oversampling setting.
			Accepted values: 0..3.

Documentation/DocBook/device-drivers.tmpl

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	@@ -111,6 +111,7 @@ X!Edrivers/base/attribute_container.c
	<!--		<!--
	X!Edrivers/base/interface.c		X!Edrivers/base/interface.c
	-->		-->
			!Iinclude/linux/platform_device.h
	!Edrivers/base/platform.c		!Edrivers/base/platform.c
	!Edrivers/base/bus.c		!Edrivers/base/bus.c
	</sect1>		</sect1>