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mei: add device kind to sysfs

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Some of the mei device heads are not generic and have
a specific purpose, we need to announce it to the user space
so it is possible to detect the correct device node via
matching attributes.

Generic heads are marked as 'mei' while special purpose heads
have their own names. Currently we are adding 'itouch' string
for Intel IPTS 1.0, 2.0 devices.

This is done via new sysfs attribute 'kind'.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200728192242.3117779-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
2020-07-28 22:22:42 +03:00
committed by Greg Kroah-Hartman
parent 9bb01fe1b6
commit 2f79d3d1f7
6 changed files with 71 additions and 10 deletions
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13
Documentation/ABI/testing/sysfs-class-mei
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@@ -90,3 +90,16 @@ Description: Display trc status register content
The ME FW writes Glitch Detection HW (TRC)
status information into trc status register
for BIOS and OS to monitor fw health.
What: /sys/class/mei/meiN/kind
Date: Jul 2020
KernelVersion: 5.8
Contact: Tomas Winkler <tomas.winkler@intel.com>
Description: Display kind of the device
Generic devices are marked as "mei"
while special purpose have their own
names.
Available options:
- mei: generic mei device.
- itouch: itouch (ipts) mei device.