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MHI Host

Browse source 
========
 
 - Added a new API mhi_power_down_keep_dev() to not destroy the struct dev
   associated with the MHI channels during MHI power down. This is useful in
   scenarios such as system suspend/hibernation where the probability of
   channels coming back is very high. So the PM maintainer suggested not to
   destroy the struct dev in those cases.
 
   This API is introduced for fixing the failure reported in the ath11k driver
   during resume from system suspend.
 
   NOTE: Due to the API dependency, the patch adding the API is pushed to an
   immutable branch (mhi-immutable) and merged into both mhi and ath trees. But
   the merge commit is not visible in mhi tree due to git being smart with
   'fast-forward'.
 
 - Added an optional sysfs entry to force the MHI devices to enter the Emergency
   Download (EDL) mode to download the firmware from host.
 
 - Added EDL mode support for Qcom SDX75/65/55 modems as per the MHI spec v1.2,
   Chapter 13.2. This involves writing a cookie to the EDL doorbell registers and
   then triggering the device reset from host.
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Merge tag 'mhi-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi into char-misc-next

Manivannan writes:

MHI Host
========

- Added a new API mhi_power_down_keep_dev() to not destroy the struct dev
  associated with the MHI channels during MHI power down. This is useful in
  scenarios such as system suspend/hibernation where the probability of
  channels coming back is very high. So the PM maintainer suggested not to
  destroy the struct dev in those cases.

  This API is introduced for fixing the failure reported in the ath11k driver
  during resume from system suspend.

  NOTE: Due to the API dependency, the patch adding the API is pushed to an
  immutable branch (mhi-immutable) and merged into both mhi and ath trees. But
  the merge commit is not visible in mhi tree due to git being smart with
  'fast-forward'.

- Added an optional sysfs entry to force the MHI devices to enter the Emergency
  Download (EDL) mode to download the firmware from host.

- Added EDL mode support for Qcom SDX75/65/55 modems as per the MHI spec v1.2,
  Chapter 13.2. This involves writing a cookie to the EDL doorbell registers and
  then triggering the device reset from host.

* tag 'mhi-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi:
  bus: mhi: host: pci_generic: Add generic edl_trigger to allow devices to enter EDL mode
  bus: mhi: host: Add a new API for getting channel doorbell offset
  bus: mhi: host: Add sysfs entry to force device to enter EDL
  bus: mhi: host: Add mhi_power_down_keep_dev() API to support system suspend/hibernation
This commit is contained in:
Greg Kroah-Hartman 2024-05-01 07:17:29 +02:00
commit 33075a03f4
7 changed files with 177 additions and 13 deletions
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