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Diffstat (limited to 'Documentation/ABI/testing/sysfs-firmware-acpi')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-acpi | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi index dd930c8db41..b4436cca97a 100644 --- a/Documentation/ABI/testing/sysfs-firmware-acpi +++ b/Documentation/ABI/testing/sysfs-firmware-acpi @@ -18,6 +18,42 @@ Description: yoffset: The number of pixels between the top of the screen and the top edge of the image. +What: /sys/firmware/acpi/hotplug/ +Date: February 2013 +Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> +Description: + There are separate hotplug profiles for different classes of + devices supported by ACPI, such as containers, memory modules, + processors, PCI root bridges etc. A hotplug profile for a given + class of devices is a collection of settings defining the way + that class of devices will be handled by the ACPI core hotplug + code. Those profiles are represented in sysfs as subdirectories + of /sys/firmware/acpi/hotplug/. + + The following setting is available to user space for each + hotplug profile: + + enabled: If set, the ACPI core will handle notifications of + hotplug events associated with the given class of + devices and will allow those devices to be ejected with + the help of the _EJ0 control method. Unsetting it + effectively disables hotplug for the correspoinding + class of devices. + + The value of the above attribute is an integer number: 1 (set) + or 0 (unset). Attempts to write any other values to it will + cause -EINVAL to be returned. + +What: /sys/firmware/acpi/hotplug/force_remove +Date: May 2013 +Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> +Description: + The number in this file (0 or 1) determines whether (1) or not + (0) the ACPI subsystem will allow devices to be hot-removed even + if they cannot be put offline gracefully (from the kernel's + viewpoint). That number can be changed by writing a boolean + value to this file. + What: /sys/firmware/acpi/interrupts/ Date: February 2008 Contact: Len Brown <lenb@kernel.org> |