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(-) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
