linux-kernel - [PATCH v1 0/6] BHI/BHIe improvements for MHI power purposes

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Message-Id: <1618598825-18629-1-git-send-email-bbhatt@codeaurora.org>
Date:   Fri, 16 Apr 2021 11:46:59 -0700
From:   Bhaumik Bhatt <bbhatt@...eaurora.org>
To:     manivannan.sadhasivam@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org, linux-wireless@...r.kernel.org,
        kvalo@...eaurora.org, ath11k@...ts.infradead.org,
        Bhaumik Bhatt <bbhatt@...eaurora.org>
Subject: [PATCH v1 0/6] BHI/BHIe improvements for MHI power purposes

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.

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           | 58 +++++++++++++++++++++++------------
 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, 47 insertions(+), 43 deletions(-)

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