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Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-remoteproc')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-remoteproc | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-remoteproc b/Documentation/ABI/testing/sysfs-class-remoteproc new file mode 100644 index 000000000000..d188afebc8ba --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-remoteproc @@ -0,0 +1,50 @@ +What: /sys/class/remoteproc/.../firmware +Date: October 2016 +Contact: Matt Redfearn <matt.redfearn@imgtec.com> +Description: Remote processor firmware + + Reports the name of the firmware currently loaded to the + remote processor. + + To change the running firmware, ensure the remote processor is + stopped (using /sys/class/remoteproc/.../state) and write a new filename. + +What: /sys/class/remoteproc/.../state +Date: October 2016 +Contact: Matt Redfearn <matt.redfearn@imgtec.com> +Description: Remote processor state + + Reports the state of the remote processor, which will be one of: + + "offline" + "suspended" + "running" + "crashed" + "invalid" + + "offline" means the remote processor is powered off. + + "suspended" means that the remote processor is suspended and + must be woken to receive messages. + + "running" is the normal state of an available remote processor + + "crashed" indicates that a problem/crash has been detected on + the remote processor. + + "invalid" is returned if the remote processor is in an + unknown state. + + Writing this file controls the state of the remote processor. + The following states can be written: + + "start" + "stop" + + Writing "start" will attempt to start the processor running the + firmware indicated by, or written to, + /sys/class/remoteproc/.../firmware. The remote processor should + transition to "running" state. + + Writing "stop" will attempt to halt the remote processor and + return it to the "offline" state. |