bus: mhi: host: Add sysfs entry to force device to enter EDL

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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>

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Qiang Yu 2024-04-24 11:21:53 +08:00 • committed by Manivannan Sadhasivam

parent 813e0ae613

commit 17553ba8e1

3 changed files with 48 additions and 0 deletions

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13

Documentation/ABI/stable/sysfs-bus-mhi

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33

drivers/bus/mhi/host/init.c

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2

include/linux/mhi.h

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