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linux/Documentation/ABI/testing/sysfs-driver-xilinx-tmr-manager

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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>
2022-11-25 11:11:11 +05:30
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
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