Merge branch 'linus' into x86/urgent (7d7a48b7) · Commits · e / devices / android_kernel_samsung_smdk4412

Documentation/ABI/testing/sysfs-ata

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		What: /sys/class/ata_...
		Date: August 2008
		Contact: Gwendal Grignou<gwendal@google.com>
		Description:

		Provide a place in sysfs for storing the ATA topology of the system. This allows
		retrieving various information about ATA objects.

		Files under /sys/class/ata_port
		-------------------------------

		For each port, a directory ataX is created where X is the ata_port_id of
		the port. The device parent is the ata host device.

		idle_irq (read)

		Number of IRQ received by the port while idle [some ata HBA only].

		nr_pmp_links (read)

		If a SATA Port Multiplier (PM) is connected, number of link behind it.

		Files under /sys/class/ata_link
		-------------------------------

		Behind each port, there is a ata_link. If there is a SATA PM in the
		topology, 15 ata_link objects are created.

		If a link is behind a port, the directory name is linkX, where X is
		ata_port_id of the port.
		If a link is behind a PM, its name is linkX.Y where X is ata_port_id
		of the parent port and Y the PM port.

		hw_sata_spd_limit

		Maximum speed supported by the connected SATA device.

		sata_spd_limit

		Maximum speed imposed by libata.

		sata_spd

		Current speed of the link [1.5, 3Gps,...].

		Files under /sys/class/ata_device
		---------------------------------

		Behind each link, up to two ata device are created.
		The name of the directory is devX[.Y].Z where:
		- X is ata_port_id of the port where the device is connected,
		- Y the port of the PM if any, and
		- Z the device id: for PATA, there is usually 2 devices [0,1],
		only 1 for SATA.

		class
		Device class. Can be "ata" for disk, "atapi" for packet device,
		"pmp" for PM, or "none" if no device was found behind the link.

		dma_mode

		Transfer modes supported by the device when in DMA mode.
		Mostly used by PATA device.

		pio_mode

		Transfer modes supported by the device when in PIO mode.
		Mostly used by PATA device.

		xfer_mode

		Current transfer mode.

		id

		Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17.
		Only valid if the device is not a PM.

		gscr

		Cached result of the dump of PM GSCR register.
		Valid registers are:
		0: SATA_PMP_GSCR_PROD_ID,
		1: SATA_PMP_GSCR_REV,
		2: SATA_PMP_GSCR_PORT_INFO,
		32: SATA_PMP_GSCR_ERROR,
		33: SATA_PMP_GSCR_ERROR_EN,
		64: SATA_PMP_GSCR_FEAT,
		96: SATA_PMP_GSCR_FEAT_EN,
		130: SATA_PMP_GSCR_SII_GPIO
		Only valid if the device is a PM.

		spdn_cnt

		Number of time libata decided to lower the speed of link due to errors.

		ering

		Formatted output of the error ring of the device.

Documentation/ABI/testing/sysfs-devices-power

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		devices this attribute is set to "enabled" by bus type code or
		device drivers and in that cases it should be safe to leave the
		default value.

		What: /sys/devices/.../power/wakeup_count
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_count attribute contains the number
		of signaled wakeup events associated with the device. This
		attribute is read-only. If the device is not enabled to wake up
		the system from sleep states, this attribute is empty.

		What: /sys/devices/.../power/wakeup_active_count
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_active_count attribute contains the
		number of times the processing of wakeup events associated with
		the device was completed (at the kernel level). This attribute
		is read-only. If the device is not enabled to wake up the
		system from sleep states, this attribute is empty.

		What: /sys/devices/.../power/wakeup_hit_count
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_hit_count attribute contains the
		number of times the processing of a wakeup event associated with
		the device might prevent the system from entering a sleep state.
		This attribute is read-only. If the device is not enabled to
		wake up the system from sleep states, this attribute is empty.

		What: /sys/devices/.../power/wakeup_active
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_active attribute contains either 1,
		or 0, depending on whether or not a wakeup event associated with
		the device is being processed (1). This attribute is read-only.
		If the device is not enabled to wake up the system from sleep
		states, this attribute is empty.

		What: /sys/devices/.../power/wakeup_total_time_ms
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_total_time_ms attribute contains
		the total time of processing wakeup events associated with the
		device, in milliseconds. This attribute is read-only. If the
		device is not enabled to wake up the system from sleep states,
		this attribute is empty.

		What: /sys/devices/.../power/wakeup_max_time_ms
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_max_time_ms attribute contains
		the maximum time of processing a single wakeup event associated
		with the device, in milliseconds. This attribute is read-only.
		If the device is not enabled to wake up the system from sleep
		states, this attribute is empty.

		What: /sys/devices/.../power/wakeup_last_time_ms
		Date: September 2010
		Contact: Rafael J. Wysocki <rjw@sisk.pl>
		Description:
		The /sys/devices/.../wakeup_last_time_ms attribute contains
		the value of the monotonic clock corresponding to the time of
		signaling the last wakeup event associated with the device, in
		milliseconds. This attribute is read-only. If the device is
		not enabled to wake up the system from sleep states, this
		attribute is empty.

		What: /sys/devices/.../power/autosuspend_delay_ms
		Date: September 2010
		Contact: Alan Stern <stern@rowland.harvard.edu>
		Description:
		The /sys/devices/.../power/autosuspend_delay_ms attribute
		contains the autosuspend delay value (in milliseconds). Some
		drivers do not want their device to suspend as soon as it
		becomes idle at run time; they want the device to remain
		inactive for a certain minimum period of time first. That
		period is called the autosuspend delay. Negative values will
		prevent the device from being suspended at run time (similar
		to writing "on" to the power/control attribute). Values >=
		1000 will cause the autosuspend timer expiration to be rounded
		up to the nearest second.

		Not all drivers support this attribute. If it isn't supported,
		attempts to read or write it will yield I/O errors.

Documentation/ABI/testing/sysfs-driver-hid-roccat-pyra

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		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/actual_cpi
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: It is possible to switch the cpi setting of the mouse with the
		press of a button.
		When read, this file returns the raw number of the actual cpi
		setting reported by the mouse. This number has to be further
		processed to receive the real dpi value.

		VALUE DPI
		1 400
		2 800
		4 1600

		This file is readonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/actual_profile
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: When read, this file returns the number of the actual profile in
		range 0-4.
		This file is readonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/firmware_version
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: When read, this file returns the raw integer version number of the
		firmware reported by the mouse. Using the integer value eases
		further usage in other programs. To receive the real version
		number the decimal point has to be shifted 2 positions to the
		left. E.g. a returned value of 138 means 1.38
		This file is readonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/profile_settings
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: The mouse can store 5 profiles which can be switched by the
		press of a button. A profile is split in settings and buttons.
		profile_settings holds informations like resolution, sensitivity
		and light effects.
		When written, this file lets one write the respective profile
		settings back to the mouse. The data has to be 13 bytes long.
		The mouse will reject invalid data.
		Which profile to write is determined by the profile number
		contained in the data.
		This file is writeonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/profile[1-5]_settings
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: The mouse can store 5 profiles which can be switched by the
		press of a button. A profile is split in settings and buttons.
		profile_settings holds informations like resolution, sensitivity
		and light effects.
		When read, these files return the respective profile settings.
		The returned data is 13 bytes in size.
		This file is readonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/profile_buttons
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: The mouse can store 5 profiles which can be switched by the
		press of a button. A profile is split in settings and buttons.
		profile_buttons holds informations about button layout.
		When written, this file lets one write the respective profile
		buttons back to the mouse. The data has to be 19 bytes long.
		The mouse will reject invalid data.
		Which profile to write is determined by the profile number
		contained in the data.
		This file is writeonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/profile[1-5]_buttons
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: The mouse can store 5 profiles which can be switched by the
		press of a button. A profile is split in settings and buttons.
		profile_buttons holds informations about button layout.
		When read, these files return the respective profile buttons.
		The returned data is 19 bytes in size.
		This file is readonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/startup_profile
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: The integer value of this attribute ranges from 0-4.
		When read, this attribute returns the number of the profile
		that's active when the mouse is powered on.
		This file is readonly.

		What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/settings
		Date: August 2010
		Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
		Description: When read, this file returns the settings stored in the mouse.
		The size of the data is 3 bytes and holds information on the
		startup_profile.
		When written, this file lets write settings back to the mouse.
		The data has to be 3 bytes long. The mouse will reject invalid
		data.

Documentation/ABI/testing/sysfs-module

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		What: /sys/module/pch_phub/drivers/.../pch_mac
		Date: August 2010
		KernelVersion: 2.6.35
		Contact: masa-korg@dsn.okisemi.com
		Description: Write/read GbE MAC address.

		What: /sys/module/pch_phub/drivers/.../pch_firmware
		Date: August 2010
		KernelVersion: 2.6.35
		Contact: masa-korg@dsn.okisemi.com
		Description: Write/read Option ROM data.

Documentation/ABI/testing/sysfs-power

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		dmesg -s 1000000 \| grep 'hash matches'

		If you do not get any matches (or they appear to be false
		positives), it is possible that the last PM event point
		referred to a device created by a loadable kernel module. In
		this case cat /sys/power/pm_trace_dev_match (see below) after
		your system is started up and the kernel modules are loaded.

		CAUTION: Using it will cause your machine's real-time (CMOS)
		clock to be set to a random invalid time after a resume.

		What; /sys/power/pm_trace_dev_match
		Date: October 2010
		Contact: James Hogan <james@albanarts.com>
		Description:
		The /sys/power/pm_trace_dev_match file contains the name of the
		device associated with the last PM event point saved in the RTC
		across reboots when pm_trace has been used. More precisely it
		contains the list of current devices (including those
		registered by loadable kernel modules since boot) which match
		the device hash in the RTC at boot, with a newline after each
		one.

		The advantage of this file over the hash matches printed to the
		kernel log (see /sys/power/pm_trace), is that it includes
		devices created after boot by loadable kernel modules.

		Due to the small hash size necessary to fit in the RTC, it is
		possible that more than one device matches the hash, in which
		case further investigation is required to determine which
		device is causing the problem. Note that genuine RTC clock
		values (such as when pm_trace has not been used), can still
		match a device and output it's name here.

		What: /sys/power/pm_async
		Date: January 2009
		Contact: Rafael J. Wysocki <rjw@sisk.pl>