linux-kernel - [PATCH v4 0/4] Add support for tsens controller reinit via trustzone

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Date:   Thu,  1 Sep 2022 16:24:10 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     linux-pm@...r.kernel.org
Cc:     bhupesh.sharma@...aro.org, bhupesh.linux@...il.com,
        linux-kernel@...r.kernel.org, andersson@...nel.org,
        konrad.dybcio@...ainline.org, linux-arm-msm@...r.kernel.org,
        daniel.lezcano@...aro.org, robh+dt@...nel.org, rafael@...nel.org,
        Amit Kucheria <amitk@...nel.org>,
        Thara Gopinath <thara.gopinath@...il.com>
Subject: [PATCH v4 0/4] Add support for tsens controller reinit via trustzone

Changes since v3:
-----------------
- v3 can be viewed here: https://lore.kernel.org/linux-arm-msm/20220804054638.3197294-1-bhupesh.sharma@linaro.org/
- Addressed review comments from Bjorn regarding early exit paths, spin
  lock being held while returning from func, etc.
- Also added Bjorn's R-Bs for v3 patches.
- Rebased on latest linux-next (master branch) tip.

Changes since v2:
-----------------
- v2 can be viewed here: https://lore.kernel.org/linux-arm-msm/20220724122424.2509021-1-bhupesh.sharma@linaro.org/
- Dropped sm6375 specific patch from v3, as suggested by Konrad.
- Rebased on latest linux-next (master branch) tip.

Changes since v1:
-----------------
- v1 can be viewed here: https://lore.kernel.org/linux-arm-msm/20220701145815.2037993-1-bhupesh.sharma@linaro.org/
- Addressed several comments from Bjorn regarding locking, serialization
  etc received on v1.
- Addressed Konrad's concerns about the tsens controller found on sm6375
  SoC which seems to start in a bad state or is disabled when entering
  the linux world.
- This series would depend on sm6375 tsens controller changes being
  added by Konrad. It is based on linux-next (master branch) tip.

Some versions of Qualcomm tsens controller might enter a
'bad state' causing sensor temperatures/interrupts status
to be in an 'invalid' state.

It is recommended to re-initialize the tsens controller
via trustzone (secure registers) using scm call(s) when that
happens.

This patchset adds the support for the same.

Cc: andersson@...nel.org
Cc: Amit Kucheria <amitk@...nel.org>
Cc: Thara Gopinath <thara.gopinath@...il.com>
Cc: linux-pm@...r.kernel.org
Cc: linux-arm-msm@...r.kernel.org

Bhupesh Sharma (4):
  firmware: qcom: scm: Add support for tsens reinit workaround
  thermal: qcom: tsens: Add hooks for supplying platform specific reinit
    quirks
  thermal: qcom: tsens: Add driver support for re-initialization quirk
  thermal: qcom: tsens: Add reinit quirk support for tsens v2
    controllers

 drivers/firmware/qcom_scm.c     |  15 +++
 drivers/firmware/qcom_scm.h     |   4 +
 drivers/thermal/qcom/tsens-v2.c |  15 +++
 drivers/thermal/qcom/tsens.c    | 193 ++++++++++++++++++++++++++++++++
 drivers/thermal/qcom/tsens.h    |  18 ++-
 include/linux/qcom_scm.h        |   2 +
 6 files changed, 246 insertions(+), 1 deletion(-)

-- 
2.37.1