[PATCH v4 0/3] Add sysfs entry to EDL mode

From: Qiang Yu
Date: Tue Apr 23 2024 - 06:34:07 EST


Add EDL sysfs entry for mhi controller that provides edl_trigger callback.
Add mhi_pci_generic_edl_trigger for qualcomm sdx55,sdx65 and sdx75 as
edl_trigger callback.

v3->v4:
1. Modify some comments, commit message and sysfs entry description.

2. Add error cleanups if get channel doorbell offset fail.

3. s/force_edl/trigger_edl

4. s/mhi_get_channel_doorbell/mhi_get_channel_doorbell_offset

5. Use mhi_get_channel_doorbell_offset in mhi_init_mmio()

v2->v3:
1. Update Documentation/ABI/stable/sysfs-bus-mhi with description of
force_edl sysfs entry.

2. Add comments about edl_trigger callback in mhi_controller struct.

3. Follow reverse christmas tree in mhi_pci_generic_edl_trigger.

4. Add a new API in MHI to allow controller to get CHDB address and avoid
duplicating the definition of CHDBOFF.

v1->v2:
1. Move all process needed by qualcomm sdx55,sdx65,sdx75 to enter EDL into
mhi_pci_generic_edl_trigger() as the callback to edl_trigger.

2. MHI stack creates EDL sysfs entry to invoke edl_trigger callback so
that devices need different mechanism to enter EDL can provide its own
edl_trigger callabck .

Qiang Yu (3):
bus: mhi: host: Add sysfs entry to force device to enter EDL
bus: mhi: host: Add a new API for getting channel doorbell address
bus: mhi: host: pci_generic: Add edl callback to enter EDL

Documentation/ABI/stable/sysfs-bus-mhi | 13 ++++++++++
drivers/bus/mhi/host/init.c | 39 ++++++++++++++++++++++++++---
drivers/bus/mhi/host/main.c | 16 ++++++++++++
drivers/bus/mhi/host/pci_generic.c | 45 ++++++++++++++++++++++++++++++++++
include/linux/mhi.h | 8 ++++++
5 files changed, 117 insertions(+), 4 deletions(-)

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2.7.4