On Tuesday, February 13, 2018 7:54:10 PM CET Aishwarya Pant wrote: > Add documentation for two attributes - status and hrv in > Documentation/ABI/testing/sysfs-bus-acpi. Compiled from git logs and the > ACPI specification. > > Signed-off-by: Aishwarya Pant <[email protected]> > --- > Documentation/ABI/testing/sysfs-bus-acpi | 36 > ++++++++++++++++++++++++++++++++ > 1 file changed, 36 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-acpi > b/Documentation/ABI/testing/sysfs-bus-acpi > index 7fa9cbc75344..89feb01d1d0d 100644 > --- a/Documentation/ABI/testing/sysfs-bus-acpi > +++ b/Documentation/ABI/testing/sysfs-bus-acpi > @@ -56,3 +56,39 @@ Description: > Writing 1 to this attribute will trigger hot removal of > this device object. This file exists for every device > object that has _EJ0 method. > + > +What: /sys/bus/acpi/devices/.../status > +Date: Jan, 2014 > +Contact: Rafael J. Wysocki <[email protected]> > +Description: > + (RO) Displays the ACPI device status - enabled, disabled or > + functioning or present, if the method _STA is present. > + > + Return value is an integer containing a device status bitmap: > + > + Bit [0] – Set if the device is present. > + Bit [1] – Set if the device is enabled and decoding its > + resources. > + Bit [2] – Set if the device should be shown in the UI. > + Bit [3] – Set if the device is functioning properly (cleared if > + device failed its diagnostics). > + Bit [4] – Set if the battery is present. > + Bits [31:5] – Reserved (must be cleared) > + > + If bit [0] is cleared, then bit 1 must also be cleared (a device > + that is not present cannot be enabled). > + > + Bit 0 can be clear (not present) with bit [3] set (device is > + functional). This case is used to indicate a valid device for > + which no device driver should be loaded. > + > + More special cases are covered in the ACPI specification. > + > +What: /sys/bus/acpi/devices/.../hrv > +Date: Apr, 2016 > +Contact: Rafael J. Wysocki <[email protected]> > +Description: > + (RO) Allows users to read the hardware version of non-PCI > + hardware, if the _HRV control method is present. It is most > + useful for non-PCI devices because lspci can list the hardware > + version for PCI devices. >
Applied, thanks!
