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| author | Appana Durga Kedareswara rao <appana.durga.kedareswara.rao@amd.com> | 2022-11-25 08:41:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-20 15:09:30 +0300 |
| commit | f5ec7f54fdba7fef051c65e975612edf46d4934d (patch) | |
| tree | 20968ae068d4291ffd05c61ee141c3dc0666cfd1 /Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager | |
| parent | fc4d041e947b2b12fe0972781b4577a7d2647bfa (diff) | |
| download | linux-f5ec7f54fdba7fef051c65e975612edf46d4934d.tar.xz | |
drivers: misc: Add Support for TMR Manager
Triple Modular Redundancy(TMR) subsystem contains three microblaze cores,
subsystem is fault-tolerant and continues to operate nominally after
encountering an error. Together with the capability to detect and recover
from errors, the implementation ensures the reliability of the entire
subsystem. TMR Manager is responsible for performing recovery of the
subsystem detects the fault via a break signal it invokes microblaze
software break handler which calls the tmr manager driver api to
update the error count and status, added support for fault detection
feature via sysfs interface.
Usage:
To know the break handler count(Error count):
cat /sys/devices/platform/amba_pl/44a10000.tmr_manager/errcnt
Signed-off-by: Appana Durga Kedareswara rao <appana.durga.kedareswara.rao@amd.com>
Link: https://lore.kernel.org/r/20221125054113.122833-3-appana.durga.kedareswara.rao@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager b/Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager new file mode 100644 index 000000000000..57b9b68a73ee --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager @@ -0,0 +1,16 @@ +What: /sys/devices/platform/amba_pl/<dev>/errcnt +Date: Nov 2022 +Contact: appana.durga.kedareswara.rao@amd.com +Description: This control file provides the fault detection count. + This file cannot be written. + Example: + # cat /sys/devices/platform/amba_pl/44a10000.tmr_manager/errcnt + 1 + +What: /sys/devices/platform/amba_pl/<dev>/dis_block_break +Date: Nov 2022 +Contact: appana.durga.kedareswara.rao@amd.com +Description: Write any value to it, This control file enables the break signal. + This file is write only. + Example: + # echo <any value> > /sys/devices/platform/amba_pl/44a10000.tmr_manager/dis_block_break |