[PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes
From: Bhaumik Bhatt
Date: Thu May 06 2021 - 15:52:21 EST
This patch series improves the power up behavior by allowing MHI host driver to
set BHI and/or BHIe offsets early on in the preparation phase and fail pre-power
up if offsets are not found or not within a limited MMIO region. This also
allows MHI host to clean up the offsets in the unprepare after power down phase.
Going forward, controllers will be required to specify a reg_len field which
will be used to check whether the BHI/BHIe offsets are in range or not.
This series has been tested on X86_64 architecture with the PCI generic driver
as controller and an SDX55 device.
v4:
-Added reviewed-by tags
-Updated range check patch to include BHI/e offsets in the error message
v3:
-Added reviewed-by tags
-Updated order of reg_len in mhi_controller structure documentation
v2:
-Added reviewed-by tags
-Moved reg_len entry in mhi_controller structure to allow for a packed struct
Bhaumik Bhatt (6):
bus: mhi: core: Set BHI/BHIe offsets on power up preparation
bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up
bus: mhi: Add MMIO region length to controller structure
ath11k: set register access length for MHI driver
bus: mhi: pci_generic: Set register access length for MHI driver
bus: mhi: core: Add range checks for BHI and BHIe
drivers/bus/mhi/core/init.c | 61 ++++++++++++++++++++++++-----------
drivers/bus/mhi/core/pm.c | 28 +++-------------
drivers/bus/mhi/pci_generic.c | 1 +
drivers/net/wireless/ath/ath11k/mhi.c | 1 +
include/linux/mhi.h | 2 ++
5 files changed, 50 insertions(+), 43 deletions(-)
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