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6ed756aa01
This patch adds a sysfs interface that provides the name of the remote processor to userspace. This allows the userspace to identify a remote processor as the remoteproc devices themselves are created based on probe order and can change from one boot to another or at runtime. The name is made available in debugfs originally, and is being retained for now. This can be cleaned up after couple of releases once users get familiar with the new interface. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
What: /sys/class/remoteproc/.../firmware
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Date: October 2016
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Contact: Matt Redfearn <matt.redfearn@mips.com>
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Description: Remote processor firmware
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Reports the name of the firmware currently loaded to the
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remote processor.
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To change the running firmware, ensure the remote processor is
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stopped (using /sys/class/remoteproc/.../state) and write a new filename.
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What: /sys/class/remoteproc/.../state
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Date: October 2016
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Contact: Matt Redfearn <matt.redfearn@mips.com>
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Description: Remote processor state
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Reports the state of the remote processor, which will be one of:
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"offline"
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"suspended"
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"running"
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"crashed"
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"invalid"
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"offline" means the remote processor is powered off.
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"suspended" means that the remote processor is suspended and
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must be woken to receive messages.
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"running" is the normal state of an available remote processor
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"crashed" indicates that a problem/crash has been detected on
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the remote processor.
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"invalid" is returned if the remote processor is in an
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unknown state.
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Writing this file controls the state of the remote processor.
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The following states can be written:
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"start"
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"stop"
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Writing "start" will attempt to start the processor running the
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firmware indicated by, or written to,
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/sys/class/remoteproc/.../firmware. The remote processor should
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transition to "running" state.
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Writing "stop" will attempt to halt the remote processor and
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return it to the "offline" state.
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What: /sys/class/remoteproc/.../name
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Date: August 2019
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KernelVersion: 5.4
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Contact: Suman Anna <s-anna@ti.com>
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Description: Remote processor name
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Reports the name of the remote processor. This can be used by
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userspace in exactly identifying a remote processor and ease
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up the usage in modifying the 'firmware' or 'state' files.
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