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mei: expose device state in sysfs

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Expose mei device state to user-space through sysfs.
This gives indication to applications that driver is in transition,
usefully mostly to detect link reset state.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
2019-04-22 09:51:07 +03:00
committed by Greg Kroah-Hartman
parent d65bf04200
commit 43b8a7ed47
5 changed files with 87 additions and 18 deletions
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15
Documentation/ABI/testing/sysfs-class-mei
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@@ -65,3 +65,18 @@ Description: Display the ME firmware version.
<platform>:<major>.<minor>.<milestone>.<build_no>.
There can be up to three such blocks for different
FW components.
What: /sys/class/mei/meiN/dev_state
Date: Mar 2019
KernelVersion: 5.1
Contact: Tomas Winkler <tomas.winkler@intel.com>
Description: Display the ME device state.
The device state can have following values:
INITIALIZING
INIT_CLIENTS
ENABLED
RESETTING
DISABLED
POWER_DOWN
POWER_UP