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SubjectRe: [PATCH] acpi: device_sysfs: update sysfs documentation
Date
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 <aishpant@gmail.com>
> ---
> 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 <rjw@rjwysocki.net>
> +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 <rjw@rjwysocki.net>
> +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!


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