45 lines
2.1 KiB
Plaintext
45 lines
2.1 KiB
Plaintext
What: /sys/bus/mhi/devices/.../serialnumber
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Date: Sept 2020
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KernelVersion: 5.10
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Contact: mhi@lists.linux.dev
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Description: The file holds the serial number of the client device obtained
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using a BHI (Boot Host Interface) register read after at least
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one attempt to power up the device has been done. If read
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without having the device power on at least once, the file will
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read all 0's.
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Users: Any userspace application or clients interested in device info.
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What: /sys/bus/mhi/devices/.../oem_pk_hash
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Date: Sept 2020
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KernelVersion: 5.10
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Contact: mhi@lists.linux.dev
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Description: The file holds the OEM PK Hash value of the endpoint device
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obtained using a BHI (Boot Host Interface) register read after
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at least one attempt to power up the device has been done. If
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read without having the device power on at least once, the file
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will read all 0's.
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Users: Any userspace application or clients interested in device info.
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What: /sys/bus/mhi/devices/.../soc_reset
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Date: April 2022
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KernelVersion: 5.19
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Contact: mhi@lists.linux.dev
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Description: Initiates a SoC reset on the MHI controller. A SoC reset is
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a reset of last resort, and will require a complete re-init.
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This can be useful as a method of recovery if the device is
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non-responsive, or as a means of loading new firmware as a
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system administration task.
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What: /sys/bus/mhi/devices/.../trigger_edl
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Date: April 2024
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KernelVersion: 6.10
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Contact: mhi@lists.linux.dev
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Description: Writing a non-zero value to this file will force devices to
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enter EDL (Emergency Download) mode. This entry only exists for
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devices capable of entering the EDL mode using the standard EDL
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triggering mechanism defined in the MHI spec v1.2. Once in EDL
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mode, the flash programmer image can be downloaded to the
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device to enter the flash programmer execution environment.
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This can be useful if user wants to use QDL (Qualcomm Download,
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which is used to download firmware over EDL) to update firmware.
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