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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2019-11-07 12:44:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-07 09:37:27 +0100 |
| commit | 52f6efdf80924449023c559c3134258c2c6da43b (patch) | |
| tree | ccd825fd49ac508daeb552315eaddf741b43f74d /Documentation/ABI/testing/sysfs-class-mei | |
| parent | 261e071acd9bcbcfbc30652640385615ced27f4f (diff) | |
| download | lwn-52f6efdf80924449023c559c3134258c2c6da43b.tar.gz lwn-52f6efdf80924449023c559c3134258c2c6da43b.zip | |
mei: add trc detection register to sysfs
The glitch detection HW (TRC) save it status information into
TRC status register.
Make it available to user-space via read-only sysfs file.
The TRC register is availab for PCH15 gen and newer, for older
platforms reading the sysfs file will fail with EOPNOTSUPP.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20191107104445.19101-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-mei')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-mei | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-mei b/Documentation/ABI/testing/sysfs-class-mei index a92d844f806e..e9dc110650ae 100644 --- a/Documentation/ABI/testing/sysfs-class-mei +++ b/Documentation/ABI/testing/sysfs-class-mei @@ -80,3 +80,13 @@ Description: Display the ME device state. DISABLED POWER_DOWN POWER_UP + +What: /sys/class/mei/meiN/trc +Date: Nov 2019 +KernelVersion: 5.5 +Contact: Tomas Winkler <tomas.winkler@intel.com> +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. |