linux-kernel - [PATCH v3 0/2] MHI MMIO register write updates

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Date:   Wed, 13 Apr 2022 09:56:44 -0600
From:   Jeffrey Hugo <quic_jhugo@...cinc.com>
To:     <loic.poulain@...aro.org>, <mani@...nel.org>,
        <quic_hemantk@...cinc.com>, <quic_bbhatt@...cinc.com>
CC:     <mhi@...ts.linux.dev>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Jeffrey Hugo <quic_jhugo@...cinc.com>
Subject: [PATCH v3 0/2] MHI MMIO register write updates

In case of MHI MMIO writes, the register field write function needs to do reads
before writes are performed. Propagate read failures such that callers are made
aware of those and can take appropriate action instead of running blind.

Optimizing the MMIO initialization function to use mhi_write_reg() in most cases
should also be done to improve design.

These patches were tested on X86_64 architecture with Ubuntu 18.04 and SDX65
attach.

v3:
Noticed this was reviewed but never picked up.  Rebased to -next

v2:
-Fix testbot reported missing set of changes from pm.c

Bhaumik Bhatt (2):
  bus: mhi: host: Bail on writing register fields if read fails
  bus: mhi: host: Optimize and update MMIO register write method

 drivers/bus/mhi/host/boot.c     | 21 +++++++++----
 drivers/bus/mhi/host/init.c     | 68 ++++++++++++++++++++++++-----------------
 drivers/bus/mhi/host/internal.h |  7 +++--
 drivers/bus/mhi/host/main.c     |  9 ++++--
 drivers/bus/mhi/host/pm.c       | 15 ++++++---
 5 files changed, 76 insertions(+), 44 deletions(-)

-- 
2.7.4