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Diffstat (limited to 'Documentation/ABI/stable/sysfs-bus-mhi')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-bus-mhi | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-bus-mhi b/Documentation/ABI/stable/sysfs-bus-mhi new file mode 100644 index 000000000000..96ccc3385a2b --- /dev/null +++ b/Documentation/ABI/stable/sysfs-bus-mhi @@ -0,0 +1,31 @@ +What: /sys/bus/mhi/devices/.../serialnumber +Date: Sept 2020 +KernelVersion: 5.10 +Contact: Bhaumik Bhatt <bbhatt@codeaurora.org> +Description: The file holds the serial number of the client device obtained + using a BHI (Boot Host Interface) register read after at least + one attempt to power up the device has been done. If read + without having the device power on at least once, the file will + read all 0's. +Users: Any userspace application or clients interested in device info. + +What: /sys/bus/mhi/devices/.../oem_pk_hash +Date: Sept 2020 +KernelVersion: 5.10 +Contact: Bhaumik Bhatt <bbhatt@codeaurora.org> +Description: The file holds the OEM PK Hash value of the endpoint device + obtained using a BHI (Boot Host Interface) register read after + at least one attempt to power up the device has been done. If + read without having the device power on at least once, the file + will read all 0's. +Users: Any userspace application or clients interested in device info. + +What: /sys/bus/mhi/devices/.../soc_reset +Date: April 2022 +KernelVersion: 5.19 +Contact: mhi@lists.linux.dev +Description: Initiates a SoC reset on the MHI controller. A SoC reset is + a reset of last resort, and will require a complete re-init. + This can be useful as a method of recovery if the device is + non-responsive, or as a means of loading new firmware as a + system administration task. |