linux-kernel - [RFC PATCH 0/2] PM6125 regulator support

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Message-Id: <20210828115654.647548-1-iskren.chernev@gmail.com>
Date:   Sat, 28 Aug 2021 14:56:52 +0300
From:   Iskren Chernev <iskren.chernev@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mark Brown <broonie@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Iskren Chernev <iskren.chernev@...il.com>
Subject: [RFC PATCH 0/2] PM6125 regulator support

This patch series adds SPMI and SMD regulator support for the PM6125 found on
SM4250/SM6115 SoCs from QCom.

The main source used for this change is qpnp pm6125 support patch from caf [1]:

[1]: https://source.codeaurora.org/quic/la/kernel/msm-5.4/commit/?h=kernel.lnx.5.4.r1-rel&id=d1220daeffaa440ffff0a8c47322eb0033bf54f5

Unfortunatelly the source patch doesn't contain regulator source groups, so all
regulators define their own source. If that was available (suggestions are
welcome), this patch could become acceptable.

While at it I have a few suggestions:
- spmi determines how to treat each regulator based on type,subtype,revision
  read from regulator register. I assume this information is fixed for a givem
  PM chip. It would be really helpful if it was available somewhere in code
  (comment) or maybe the commit message, so correct voltage range and ops can
  be determined without firing up an actual device and extracting that info.
  I've included this info in the spmi commit message in patch 1/2.
- according to caf source, there are 3 general revisions of regs/ops, called
  common, common2, common3. I think this is cleaner than picking the first
  regulator name from the new generation and naming ops/regs on it. For example
  ftsmps426 functions/regs are common2 in caf, and my patch introduces common3
  (named ftsmps3).

About correctness:
- spmi patch was compile-tested
- rpm/smd patch was tested (voltage ranges come from spmi+type/subtype info)

Iskren Chernev (2):
  regulator: qcom_spmi: Add PM6125 regulators
  regulator: qcom_smd: Add PM6125 regulator support

 drivers/regulator/qcom_smd-regulator.c  |  46 +++++++
 drivers/regulator/qcom_spmi-regulator.c | 160 +++++++++++++++++++++++-
 2 files changed, 204 insertions(+), 2 deletions(-)


base-commit: 5e63226c72287bc6c6724d4fc7e157af0e3d7908
--
2.33.0