diff options
| author | Qiang Yu <quic_qianyu@quicinc.com> | 2024-04-24 11:21:53 +0800 |
|---|---|---|
| committer | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2024-04-25 20:16:42 +0530 |
| commit | 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 (patch) | |
| tree | 5b8725ed7a2cc33ab7395598fb80560b4542b12e /Documentation/ABI | |
| parent | 813e0ae613d6ee1b3e11f1c41f8b9e9df8ef0493 (diff) | |
bus: mhi: host: Add sysfs entry to force device to enter EDL
Add sysfs entry to allow users of MHI bus to force device to enter EDL
(Emergency Download) mode to download the device firmware. Since there is
no guarantee that all the devices will support EDL mode, the sysfs entry
is kept as an optional one and will appear only for the supported devices.
Controllers supporting the EDL mode are expected to provide edl_trigger()
callback that puts the device into EDL mode.
Signed-off-by: Qiang Yu <quic_qianyu@quicinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1713928915-18229-2-git-send-email-quic_qianyu@quicinc.com
[mani: fixed the kernel version and reworded the commit message]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-bus-mhi | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-bus-mhi b/Documentation/ABI/stable/sysfs-bus-mhi index 1a47f9e0cc84..8b9698fa0beb 100644 --- a/Documentation/ABI/stable/sysfs-bus-mhi +++ b/Documentation/ABI/stable/sysfs-bus-mhi @@ -29,3 +29,16 @@ Description: Initiates a SoC reset on the MHI controller. A SoC reset is 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. + +What: /sys/bus/mhi/devices/.../trigger_edl +Date: April 2024 +KernelVersion: 6.10 +Contact: mhi@lists.linux.dev +Description: Writing a non-zero value to this file will force devices to + enter EDL (Emergency Download) mode. This entry only exists for + devices capable of entering the EDL mode using the standard EDL + triggering mechanism defined in the MHI spec v1.2. Once in EDL + mode, the flash programmer image can be downloaded to the + device to enter the flash programmer execution environment. + This can be useful if user wants to use QDL (Qualcomm Download, + which is used to download firmware over EDL) to update firmware. |