Loading Documentation/ABI/stable/sysfs-bus-usb 0 → 100644 +142 −0 Original line number Diff line number Diff line What: /sys/bus/usb/devices/.../power/persist Date: May 2007 KernelVersion: 2.6.23 Contact: Alan Stern <stern@rowland.harvard.edu> Description: If CONFIG_USB_PERSIST is set, then each USB device directory will contain a file named power/persist. The file holds a boolean value (0 or 1) indicating whether or not the "USB-Persist" facility is enabled for the device. Since the facility is inherently dangerous, it is disabled by default for all devices except hubs. For more information, see Documentation/usb/persist.txt. What: /sys/bus/usb/devices/.../power/autosuspend Date: March 2007 KernelVersion: 2.6.21 Contact: Alan Stern <stern@rowland.harvard.edu> Description: Each USB device directory will contain a file named power/autosuspend. This file holds the time (in seconds) the device must be idle before it will be autosuspended. 0 means the device will be autosuspended as soon as possible. Negative values will prevent the device from being autosuspended at all, and writing a negative value will resume the device if it is already suspended. The autosuspend delay for newly-created devices is set to the value of the usbcore.autosuspend module parameter. What: /sys/bus/usb/device/.../power/connected_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been connected to the machine. This file is read-only. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/device/.../power/active_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been active, i.e. not in a suspended state. This file is read-only. Tools can use this file and the connected_duration file to compute the percentage of time that a device has been active. For example, echo $((100 * `cat active_duration` / `cat connected_duration`)) will give an integer percentage. Note that this does not account for counter wrap. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/devices/<busnum>-<port[.port]>...:<config num>-<interface num>/supports_autosuspend Date: January 2008 KernelVersion: 2.6.27 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: When read, this file returns 1 if the interface driver for this interface supports autosuspend. It also returns 1 if no driver has claimed this interface, as an unclaimed interface will not stop the device from being autosuspended if all other interface drivers are idle. The file returns 0 if autosuspend support has not been added to the driver. Users: USB PM tool git://git.moblin.org/users/sarah/usb-pm-tool/ What: /sys/bus/usb/device/.../avoid_reset_quirk Date: December 2009 Contact: Oliver Neukum <oliver@neukum.org> Description: Writing 1 to this file tells the kernel that this device will morph into another mode when it is reset. Drivers will not use reset for error handling for such devices. Users: usb_modeswitch What: /sys/bus/usb/devices/.../devnum KernelVersion: since at least 2.6.18 Description: Device address on the USB bus. Users: libusb What: /sys/bus/usb/devices/.../bConfigurationValue KernelVersion: since at least 2.6.18 Description: bConfigurationValue of the *active* configuration for the device. Writing 0 or -1 to bConfigurationValue will reset the active configuration (unconfigure the device). Writing another value will change the active configuration. Note that some devices, in violation of the USB spec, have a configuration with a value equal to 0. Writing 0 to bConfigurationValue for these devices will install that configuration, rather then unconfigure the device. Writing -1 will always unconfigure the device. Users: libusb What: /sys/bus/usb/devices/.../busnum KernelVersion: 2.6.22 Description: Bus-number of the USB-bus the device is connected to. Users: libusb What: /sys/bus/usb/devices/.../descriptors KernelVersion: 2.6.26 Description: Binary file containing cached descriptors of the device. The binary data consists of the device descriptor followed by the descriptors for each configuration of the device. Note that the wTotalLength of the config descriptors can not be trusted, as the device may have a smaller config descriptor than it advertises. The bLength field of each (sub) descriptor can be trusted, and can be used to seek forward one (sub) descriptor at a time until the next config descriptor is found. All descriptors read from this file are in bus-endian format Users: libusb What: /sys/bus/usb/devices/.../speed KernelVersion: since at least 2.6.18 Description: Speed the device is connected with to the usb-host in Mbit / second. IE one of 1.5 / 12 / 480 / 5000. Users: libusb Documentation/ABI/testing/sysfs-bus-iio +19 −0 Original line number Diff line number Diff line Loading @@ -351,6 +351,7 @@ Description: 6kohm_to_gnd: connected to ground via a 6kOhm resistor, 20kohm_to_gnd: connected to ground via a 20kOhm resistor, 100kohm_to_gnd: connected to ground via an 100kOhm resistor, 500kohm_to_gnd: connected to ground via a 500kOhm resistor, three_state: left floating. For a list of available output power down options read outX_powerdown_mode_available. If Y is not present the Loading Loading @@ -792,3 +793,21 @@ Contact: linux-iio@vger.kernel.org Description: This attribute is used to read the amount of quadrature error present in the device at a given time. What: /sys/.../iio:deviceX/in_accelX_power_mode KernelVersion: 3.11 Contact: linux-iio@vger.kernel.org Description: Specifies the chip power mode. low_noise: reduce noise level from ADC, low_power: enable low current consumption. For a list of available output power modes read in_accel_power_mode_available. What: /sys/bus/iio/devices/iio:deviceX/store_eeprom KernelVersion: 3.4.0 Contact: linux-iio@vger.kernel.org Description: Writing '1' stores the current device configuration into on-chip EEPROM. After power-up or chip reset the device will automatically load the saved configuration. Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523 +0 −8 Original line number Diff line number Diff line Loading @@ -18,14 +18,6 @@ Description: Reading returns either '1' or '0'. '1' means that the pllY is locked. What: /sys/bus/iio/devices/iio:deviceX/store_eeprom KernelVersion: 3.4.0 Contact: linux-iio@vger.kernel.org Description: Writing '1' stores the current device configuration into on-chip EEPROM. After power-up or chip reset the device will automatically load the saved configuration. What: /sys/bus/iio/devices/iio:deviceX/sync_dividers KernelVersion: 3.4.0 Contact: linux-iio@vger.kernel.org Loading Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 +1 −1 Original line number Diff line number Diff line Loading @@ -18,4 +18,4 @@ Description: adjust the reference frequency accordingly. The value written has no effect until out_altvoltageY_frequency is updated. Consider to use out_altvoltageY_powerdown to power down the PLL and it's RFOut buffers during REFin changes. down the PLL and its RFOut buffers during REFin changes. Documentation/ABI/testing/sysfs-bus-usb +0 −89 Original line number Diff line number Diff line What: /sys/bus/usb/devices/.../power/autosuspend Date: March 2007 KernelVersion: 2.6.21 Contact: Alan Stern <stern@rowland.harvard.edu> Description: Each USB device directory will contain a file named power/autosuspend. This file holds the time (in seconds) the device must be idle before it will be autosuspended. 0 means the device will be autosuspended as soon as possible. Negative values will prevent the device from being autosuspended at all, and writing a negative value will resume the device if it is already suspended. The autosuspend delay for newly-created devices is set to the value of the usbcore.autosuspend module parameter. What: /sys/bus/usb/devices/.../power/persist Date: May 2007 KernelVersion: 2.6.23 Contact: Alan Stern <stern@rowland.harvard.edu> Description: If CONFIG_USB_PERSIST is set, then each USB device directory will contain a file named power/persist. The file holds a boolean value (0 or 1) indicating whether or not the "USB-Persist" facility is enabled for the device. Since the facility is inherently dangerous, it is disabled by default for all devices except hubs. For more information, see Documentation/usb/persist.txt. What: /sys/bus/usb/device/.../power/connected_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been connected to the machine. This file is read-only. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/device/.../power/active_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been active, i.e. not in a suspended state. This file is read-only. Tools can use this file and the connected_duration file to compute the percentage of time that a device has been active. For example, echo $((100 * `cat active_duration` / `cat connected_duration`)) will give an integer percentage. Note that this does not account for counter wrap. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/device/<busnum>-<devnum>...:<config num>-<interface num>/supports_autosuspend Date: January 2008 KernelVersion: 2.6.27 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: When read, this file returns 1 if the interface driver for this interface supports autosuspend. It also returns 1 if no driver has claimed this interface, as an unclaimed interface will not stop the device from being autosuspended if all other interface drivers are idle. The file returns 0 if autosuspend support has not been added to the driver. Users: USB PM tool git://git.moblin.org/users/sarah/usb-pm-tool/ What: /sys/bus/usb/device/.../authorized Date: July 2008 KernelVersion: 2.6.26 Loading Loading @@ -172,17 +94,6 @@ Description: device IDs, exactly like reading from the entry "/sys/bus/usb/drivers/.../new_id" What: /sys/bus/usb/device/.../avoid_reset_quirk Date: December 2009 Contact: Oliver Neukum <oliver@neukum.org> Description: Writing 1 to this file tells the kernel that this device will morph into another mode when it is reset. Drivers will not use reset for error handling for such devices. Users: usb_modeswitch What: /sys/bus/usb/devices/.../power/usb2_hardware_lpm Date: September 2011 Contact: Andiry Xu <andiry.xu@amd.com> Loading Loading
Documentation/ABI/stable/sysfs-bus-usb 0 → 100644 +142 −0 Original line number Diff line number Diff line What: /sys/bus/usb/devices/.../power/persist Date: May 2007 KernelVersion: 2.6.23 Contact: Alan Stern <stern@rowland.harvard.edu> Description: If CONFIG_USB_PERSIST is set, then each USB device directory will contain a file named power/persist. The file holds a boolean value (0 or 1) indicating whether or not the "USB-Persist" facility is enabled for the device. Since the facility is inherently dangerous, it is disabled by default for all devices except hubs. For more information, see Documentation/usb/persist.txt. What: /sys/bus/usb/devices/.../power/autosuspend Date: March 2007 KernelVersion: 2.6.21 Contact: Alan Stern <stern@rowland.harvard.edu> Description: Each USB device directory will contain a file named power/autosuspend. This file holds the time (in seconds) the device must be idle before it will be autosuspended. 0 means the device will be autosuspended as soon as possible. Negative values will prevent the device from being autosuspended at all, and writing a negative value will resume the device if it is already suspended. The autosuspend delay for newly-created devices is set to the value of the usbcore.autosuspend module parameter. What: /sys/bus/usb/device/.../power/connected_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been connected to the machine. This file is read-only. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/device/.../power/active_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been active, i.e. not in a suspended state. This file is read-only. Tools can use this file and the connected_duration file to compute the percentage of time that a device has been active. For example, echo $((100 * `cat active_duration` / `cat connected_duration`)) will give an integer percentage. Note that this does not account for counter wrap. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/devices/<busnum>-<port[.port]>...:<config num>-<interface num>/supports_autosuspend Date: January 2008 KernelVersion: 2.6.27 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: When read, this file returns 1 if the interface driver for this interface supports autosuspend. It also returns 1 if no driver has claimed this interface, as an unclaimed interface will not stop the device from being autosuspended if all other interface drivers are idle. The file returns 0 if autosuspend support has not been added to the driver. Users: USB PM tool git://git.moblin.org/users/sarah/usb-pm-tool/ What: /sys/bus/usb/device/.../avoid_reset_quirk Date: December 2009 Contact: Oliver Neukum <oliver@neukum.org> Description: Writing 1 to this file tells the kernel that this device will morph into another mode when it is reset. Drivers will not use reset for error handling for such devices. Users: usb_modeswitch What: /sys/bus/usb/devices/.../devnum KernelVersion: since at least 2.6.18 Description: Device address on the USB bus. Users: libusb What: /sys/bus/usb/devices/.../bConfigurationValue KernelVersion: since at least 2.6.18 Description: bConfigurationValue of the *active* configuration for the device. Writing 0 or -1 to bConfigurationValue will reset the active configuration (unconfigure the device). Writing another value will change the active configuration. Note that some devices, in violation of the USB spec, have a configuration with a value equal to 0. Writing 0 to bConfigurationValue for these devices will install that configuration, rather then unconfigure the device. Writing -1 will always unconfigure the device. Users: libusb What: /sys/bus/usb/devices/.../busnum KernelVersion: 2.6.22 Description: Bus-number of the USB-bus the device is connected to. Users: libusb What: /sys/bus/usb/devices/.../descriptors KernelVersion: 2.6.26 Description: Binary file containing cached descriptors of the device. The binary data consists of the device descriptor followed by the descriptors for each configuration of the device. Note that the wTotalLength of the config descriptors can not be trusted, as the device may have a smaller config descriptor than it advertises. The bLength field of each (sub) descriptor can be trusted, and can be used to seek forward one (sub) descriptor at a time until the next config descriptor is found. All descriptors read from this file are in bus-endian format Users: libusb What: /sys/bus/usb/devices/.../speed KernelVersion: since at least 2.6.18 Description: Speed the device is connected with to the usb-host in Mbit / second. IE one of 1.5 / 12 / 480 / 5000. Users: libusb
Documentation/ABI/testing/sysfs-bus-iio +19 −0 Original line number Diff line number Diff line Loading @@ -351,6 +351,7 @@ Description: 6kohm_to_gnd: connected to ground via a 6kOhm resistor, 20kohm_to_gnd: connected to ground via a 20kOhm resistor, 100kohm_to_gnd: connected to ground via an 100kOhm resistor, 500kohm_to_gnd: connected to ground via a 500kOhm resistor, three_state: left floating. For a list of available output power down options read outX_powerdown_mode_available. If Y is not present the Loading Loading @@ -792,3 +793,21 @@ Contact: linux-iio@vger.kernel.org Description: This attribute is used to read the amount of quadrature error present in the device at a given time. What: /sys/.../iio:deviceX/in_accelX_power_mode KernelVersion: 3.11 Contact: linux-iio@vger.kernel.org Description: Specifies the chip power mode. low_noise: reduce noise level from ADC, low_power: enable low current consumption. For a list of available output power modes read in_accel_power_mode_available. What: /sys/bus/iio/devices/iio:deviceX/store_eeprom KernelVersion: 3.4.0 Contact: linux-iio@vger.kernel.org Description: Writing '1' stores the current device configuration into on-chip EEPROM. After power-up or chip reset the device will automatically load the saved configuration.
Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523 +0 −8 Original line number Diff line number Diff line Loading @@ -18,14 +18,6 @@ Description: Reading returns either '1' or '0'. '1' means that the pllY is locked. What: /sys/bus/iio/devices/iio:deviceX/store_eeprom KernelVersion: 3.4.0 Contact: linux-iio@vger.kernel.org Description: Writing '1' stores the current device configuration into on-chip EEPROM. After power-up or chip reset the device will automatically load the saved configuration. What: /sys/bus/iio/devices/iio:deviceX/sync_dividers KernelVersion: 3.4.0 Contact: linux-iio@vger.kernel.org Loading
Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 +1 −1 Original line number Diff line number Diff line Loading @@ -18,4 +18,4 @@ Description: adjust the reference frequency accordingly. The value written has no effect until out_altvoltageY_frequency is updated. Consider to use out_altvoltageY_powerdown to power down the PLL and it's RFOut buffers during REFin changes. down the PLL and its RFOut buffers during REFin changes.
Documentation/ABI/testing/sysfs-bus-usb +0 −89 Original line number Diff line number Diff line What: /sys/bus/usb/devices/.../power/autosuspend Date: March 2007 KernelVersion: 2.6.21 Contact: Alan Stern <stern@rowland.harvard.edu> Description: Each USB device directory will contain a file named power/autosuspend. This file holds the time (in seconds) the device must be idle before it will be autosuspended. 0 means the device will be autosuspended as soon as possible. Negative values will prevent the device from being autosuspended at all, and writing a negative value will resume the device if it is already suspended. The autosuspend delay for newly-created devices is set to the value of the usbcore.autosuspend module parameter. What: /sys/bus/usb/devices/.../power/persist Date: May 2007 KernelVersion: 2.6.23 Contact: Alan Stern <stern@rowland.harvard.edu> Description: If CONFIG_USB_PERSIST is set, then each USB device directory will contain a file named power/persist. The file holds a boolean value (0 or 1) indicating whether or not the "USB-Persist" facility is enabled for the device. Since the facility is inherently dangerous, it is disabled by default for all devices except hubs. For more information, see Documentation/usb/persist.txt. What: /sys/bus/usb/device/.../power/connected_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been connected to the machine. This file is read-only. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/device/.../power/active_duration Date: January 2008 KernelVersion: 2.6.25 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: If CONFIG_PM_RUNTIME is enabled then this file is present. When read, it returns the total time (in msec) that the USB device has been active, i.e. not in a suspended state. This file is read-only. Tools can use this file and the connected_duration file to compute the percentage of time that a device has been active. For example, echo $((100 * `cat active_duration` / `cat connected_duration`)) will give an integer percentage. Note that this does not account for counter wrap. Users: PowerTOP <power@bughost.org> http://www.lesswatts.org/projects/powertop/ What: /sys/bus/usb/device/<busnum>-<devnum>...:<config num>-<interface num>/supports_autosuspend Date: January 2008 KernelVersion: 2.6.27 Contact: Sarah Sharp <sarah.a.sharp@intel.com> Description: When read, this file returns 1 if the interface driver for this interface supports autosuspend. It also returns 1 if no driver has claimed this interface, as an unclaimed interface will not stop the device from being autosuspended if all other interface drivers are idle. The file returns 0 if autosuspend support has not been added to the driver. Users: USB PM tool git://git.moblin.org/users/sarah/usb-pm-tool/ What: /sys/bus/usb/device/.../authorized Date: July 2008 KernelVersion: 2.6.26 Loading Loading @@ -172,17 +94,6 @@ Description: device IDs, exactly like reading from the entry "/sys/bus/usb/drivers/.../new_id" What: /sys/bus/usb/device/.../avoid_reset_quirk Date: December 2009 Contact: Oliver Neukum <oliver@neukum.org> Description: Writing 1 to this file tells the kernel that this device will morph into another mode when it is reset. Drivers will not use reset for error handling for such devices. Users: usb_modeswitch What: /sys/bus/usb/devices/.../power/usb2_hardware_lpm Date: September 2011 Contact: Andiry Xu <andiry.xu@amd.com> Loading
