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| author | Rajan Vaja <rajan.vaja@xilinx.com> | 2020-04-24 23:58:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-28 16:46:54 +0300 |
| commit | a2cc220a9a9227b2c5c9b39f57340bce64f040fd (patch) | |
| tree | ff7b808bcc9c008c75a69a25853959889f139dac /Documentation/ABI/stable | |
| parent | b3ae24c44848c6403fb2333d7cbe494565058352 (diff) | |
| download | linux-a2cc220a9a9227b2c5c9b39f57340bce64f040fd.tar.xz | |
firmware: xilinx: Add sysfs and API to set boot health status
Add sysfs interface to set boot health status from user space.
Add API used by this interface to communicate with firmware.
If PMUFW is compiled with CHECK_HEALTHY_BOOT, it will check the
healthy bit on FPD WDT expiration. If healthy bit is set by a user
application running in Linux, PMUFW will do APU only restart. If
healthy bit is not set during FPD WDT expiration, PMUFW will do
system restart.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-26-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/stable')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-driver-firmware-zynqmp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp b/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp index 554f30c3b398..00fa04c76ff3 100644 --- a/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp +++ b/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp @@ -80,3 +80,24 @@ Description: # echo "subsystem" > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope Users: Xilinx + +What: /sys/devices/platform/firmware\:zynqmp-firmware/health_status +Date: March 2020 +KernelVersion: 5.6 +Contact: "Jolly Shah" <jollys@xilinx.com> +Description: + This sysfs interface allows to set the health status. If PMUFW + is compiled with CHECK_HEALTHY_BOOT, it will check the healthy + bit on FPD WDT expiration. If healthy bit is set by a user + application running in Linux, PMUFW will do APU only restart. If + healthy bit is not set during FPD WDT expiration, PMUFW will do + system restart. + + Usage: + Set healthy bit + # echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status + + Unset healthy bit + # echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status + +Users: Xilinx |