Loading Documentation/ABI/testing/sysfs-block +14 −0 Original line number Diff line number Diff line Loading @@ -128,3 +128,17 @@ Description: preferred request size for workloads where sustained throughput is desired. If no optimal I/O size is reported this file contains 0. What: /sys/block/<disk>/queue/nomerges Date: January 2010 Contact: Description: Standard I/O elevator operations include attempts to merge contiguous I/Os. For known random I/O loads these attempts will always fail and result in extra cycles being spent in the kernel. This allows one to turn off this behavior on one of two ways: When set to 1, complex merge checks are disabled, but the simple one-shot merges with the previous I/O request are enabled. When set to 2, all merge tries are disabled. The default value is 0 - which enables all types of merge tries. Documentation/ABI/testing/sysfs-bus-usb +11 −0 Original line number Diff line number Diff line Loading @@ -159,3 +159,14 @@ Description: device. This is useful to ensure auto probing won't match the driver to the device. For example: # echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id What: /sys/bus/usb/device/.../avoid_reset 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 Documentation/ABI/testing/sysfs-devices-power 0 → 100644 +79 −0 Original line number Diff line number Diff line What: /sys/devices/.../power/ Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../power directory contains attributes allowing the user space to check and modify some power management related properties of given device. What: /sys/devices/.../power/wakeup Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../power/wakeup attribute allows the user space to check if the device is enabled to wake up the system from sleep states, such as the memory sleep state (suspend to RAM) and hibernation (suspend to disk), and to enable or disable it to do that as desired. Some devices support "wakeup" events, which are hardware signals used to activate the system from a sleep state. Such devices have one of the following two values for the sysfs power/wakeup file: + "enabled\n" to issue the events; + "disabled\n" not to do so; In that cases the user space can change the setting represented by the contents of this file by writing either "enabled", or "disabled" to it. For the devices that are not capable of generating system wakeup events this file contains "\n". In that cases the user space cannot modify the contents of this file and the device cannot be enabled to wake up the system. What: /sys/devices/.../power/control Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../power/control attribute allows the user space to control the run-time power management of the device. All devices have one of the following two values for the power/control file: + "auto\n" to allow the device to be power managed at run time; + "on\n" to prevent the device from being power managed; The default for all devices is "auto", which means that they may be subject to automatic power management, depending on their drivers. Changing this attribute to "on" prevents the driver from power managing the device at run time. Doing that while the device is suspended causes it to be woken up. What: /sys/devices/.../power/async Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../async attribute allows the user space to enable or diasble the device's suspend and resume callbacks to be executed asynchronously (ie. in separate threads, in parallel with the main suspend/resume thread) during system-wide power transitions (eg. suspend to RAM, hibernation). All devices have one of the following two values for the power/async file: + "enabled\n" to permit the asynchronous suspend/resume; + "disabled\n" to forbid it; The value of this attribute may be changed by writing either "enabled", or "disabled" to it. It generally is unsafe to permit the asynchronous suspend/resume of a device unless it is certain that all of the PM dependencies of the device are known to the PM core. However, for some 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. Documentation/ABI/testing/sysfs-platform-asus-laptop +6 −6 Original line number Diff line number Diff line What: /sys/devices/platform/asus-laptop/display What: /sys/devices/platform/asus_laptop/display Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -13,7 +13,7 @@ Description: Ex: - 0 (0000b) means no display - 3 (0011b) CRT+LCD. What: /sys/devices/platform/asus-laptop/gps What: /sys/devices/platform/asus_laptop/gps Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -21,7 +21,7 @@ Description: Control the gps device. 1 means on, 0 means off. Users: Lapsus What: /sys/devices/platform/asus-laptop/ledd What: /sys/devices/platform/asus_laptop/ledd Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -29,11 +29,11 @@ Description: Some models like the W1N have a LED display that can be used to display several informations. To control the LED display, use the following : echo 0x0T000DDD > /sys/devices/platform/asus-laptop/ echo 0x0T000DDD > /sys/devices/platform/asus_laptop/ where T control the 3 letters display, and DDD the 3 digits display. The DDD table can be found in Documentation/laptops/asus-laptop.txt What: /sys/devices/platform/asus-laptop/bluetooth What: /sys/devices/platform/asus_laptop/bluetooth Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -42,7 +42,7 @@ Description: This may control the led, the device or both. Users: Lapsus What: /sys/devices/platform/asus-laptop/wlan What: /sys/devices/platform/asus_laptop/wlan Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading Documentation/ABI/testing/sysfs-platform-eeepc-laptop +5 −5 Original line number Diff line number Diff line What: /sys/devices/platform/eeepc-laptop/disp What: /sys/devices/platform/eeepc/disp Date: May 2008 KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -9,21 +9,21 @@ Description: - 3 = LCD+CRT If you run X11, you should use xrandr instead. What: /sys/devices/platform/eeepc-laptop/camera What: /sys/devices/platform/eeepc/camera Date: May 2008 KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Control the camera. 1 means on, 0 means off. What: /sys/devices/platform/eeepc-laptop/cardr What: /sys/devices/platform/eeepc/cardr Date: May 2008 KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Control the card reader. 1 means on, 0 means off. What: /sys/devices/platform/eeepc-laptop/cpufv What: /sys/devices/platform/eeepc/cpufv Date: Jun 2009 KernelVersion: 2.6.31 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -42,7 +42,7 @@ Description: `------------ Availables modes For example, 0x301 means: mode 1 selected, 3 available modes. What: /sys/devices/platform/eeepc-laptop/available_cpufv What: /sys/devices/platform/eeepc/available_cpufv Date: Jun 2009 KernelVersion: 2.6.31 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading Loading
Documentation/ABI/testing/sysfs-block +14 −0 Original line number Diff line number Diff line Loading @@ -128,3 +128,17 @@ Description: preferred request size for workloads where sustained throughput is desired. If no optimal I/O size is reported this file contains 0. What: /sys/block/<disk>/queue/nomerges Date: January 2010 Contact: Description: Standard I/O elevator operations include attempts to merge contiguous I/Os. For known random I/O loads these attempts will always fail and result in extra cycles being spent in the kernel. This allows one to turn off this behavior on one of two ways: When set to 1, complex merge checks are disabled, but the simple one-shot merges with the previous I/O request are enabled. When set to 2, all merge tries are disabled. The default value is 0 - which enables all types of merge tries.
Documentation/ABI/testing/sysfs-bus-usb +11 −0 Original line number Diff line number Diff line Loading @@ -159,3 +159,14 @@ Description: device. This is useful to ensure auto probing won't match the driver to the device. For example: # echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id What: /sys/bus/usb/device/.../avoid_reset 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
Documentation/ABI/testing/sysfs-devices-power 0 → 100644 +79 −0 Original line number Diff line number Diff line What: /sys/devices/.../power/ Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../power directory contains attributes allowing the user space to check and modify some power management related properties of given device. What: /sys/devices/.../power/wakeup Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../power/wakeup attribute allows the user space to check if the device is enabled to wake up the system from sleep states, such as the memory sleep state (suspend to RAM) and hibernation (suspend to disk), and to enable or disable it to do that as desired. Some devices support "wakeup" events, which are hardware signals used to activate the system from a sleep state. Such devices have one of the following two values for the sysfs power/wakeup file: + "enabled\n" to issue the events; + "disabled\n" not to do so; In that cases the user space can change the setting represented by the contents of this file by writing either "enabled", or "disabled" to it. For the devices that are not capable of generating system wakeup events this file contains "\n". In that cases the user space cannot modify the contents of this file and the device cannot be enabled to wake up the system. What: /sys/devices/.../power/control Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../power/control attribute allows the user space to control the run-time power management of the device. All devices have one of the following two values for the power/control file: + "auto\n" to allow the device to be power managed at run time; + "on\n" to prevent the device from being power managed; The default for all devices is "auto", which means that they may be subject to automatic power management, depending on their drivers. Changing this attribute to "on" prevents the driver from power managing the device at run time. Doing that while the device is suspended causes it to be woken up. What: /sys/devices/.../power/async Date: January 2009 Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../async attribute allows the user space to enable or diasble the device's suspend and resume callbacks to be executed asynchronously (ie. in separate threads, in parallel with the main suspend/resume thread) during system-wide power transitions (eg. suspend to RAM, hibernation). All devices have one of the following two values for the power/async file: + "enabled\n" to permit the asynchronous suspend/resume; + "disabled\n" to forbid it; The value of this attribute may be changed by writing either "enabled", or "disabled" to it. It generally is unsafe to permit the asynchronous suspend/resume of a device unless it is certain that all of the PM dependencies of the device are known to the PM core. However, for some 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.
Documentation/ABI/testing/sysfs-platform-asus-laptop +6 −6 Original line number Diff line number Diff line What: /sys/devices/platform/asus-laptop/display What: /sys/devices/platform/asus_laptop/display Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -13,7 +13,7 @@ Description: Ex: - 0 (0000b) means no display - 3 (0011b) CRT+LCD. What: /sys/devices/platform/asus-laptop/gps What: /sys/devices/platform/asus_laptop/gps Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -21,7 +21,7 @@ Description: Control the gps device. 1 means on, 0 means off. Users: Lapsus What: /sys/devices/platform/asus-laptop/ledd What: /sys/devices/platform/asus_laptop/ledd Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -29,11 +29,11 @@ Description: Some models like the W1N have a LED display that can be used to display several informations. To control the LED display, use the following : echo 0x0T000DDD > /sys/devices/platform/asus-laptop/ echo 0x0T000DDD > /sys/devices/platform/asus_laptop/ where T control the 3 letters display, and DDD the 3 digits display. The DDD table can be found in Documentation/laptops/asus-laptop.txt What: /sys/devices/platform/asus-laptop/bluetooth What: /sys/devices/platform/asus_laptop/bluetooth Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -42,7 +42,7 @@ Description: This may control the led, the device or both. Users: Lapsus What: /sys/devices/platform/asus-laptop/wlan What: /sys/devices/platform/asus_laptop/wlan Date: January 2007 KernelVersion: 2.6.20 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading
Documentation/ABI/testing/sysfs-platform-eeepc-laptop +5 −5 Original line number Diff line number Diff line What: /sys/devices/platform/eeepc-laptop/disp What: /sys/devices/platform/eeepc/disp Date: May 2008 KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -9,21 +9,21 @@ Description: - 3 = LCD+CRT If you run X11, you should use xrandr instead. What: /sys/devices/platform/eeepc-laptop/camera What: /sys/devices/platform/eeepc/camera Date: May 2008 KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Control the camera. 1 means on, 0 means off. What: /sys/devices/platform/eeepc-laptop/cardr What: /sys/devices/platform/eeepc/cardr Date: May 2008 KernelVersion: 2.6.26 Contact: "Corentin Chary" <corentincj@iksaif.net> Description: Control the card reader. 1 means on, 0 means off. What: /sys/devices/platform/eeepc-laptop/cpufv What: /sys/devices/platform/eeepc/cpufv Date: Jun 2009 KernelVersion: 2.6.31 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading @@ -42,7 +42,7 @@ Description: `------------ Availables modes For example, 0x301 means: mode 1 selected, 3 available modes. What: /sys/devices/platform/eeepc-laptop/available_cpufv What: /sys/devices/platform/eeepc/available_cpufv Date: Jun 2009 KernelVersion: 2.6.31 Contact: "Corentin Chary" <corentincj@iksaif.net> Loading
