linux-kernel - [PATCH v2 0/3] cpufreq: Add basic cpufreq scaling for Qualcomm MSM8909

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Message-Id: <20231018-msm8909-cpufreq-v2-0-0962df95f654@kernkonzept.com>
Date:   Wed, 18 Oct 2023 10:06:01 +0200
From:   Stephan Gerhold <stephan.gerhold@...nkonzept.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Ilia Lin <ilia.lin@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Stephan Gerhold <stephan.gerhold@...nkonzept.com>,
        stable@...r.kernel.org
Subject: [PATCH v2 0/3] cpufreq: Add basic cpufreq scaling for Qualcomm
 MSM8909

Add the necessary definitions to the qcom-cpufreq-nvmem driver to
support basic cpufreq scaling on the Qualcomm MSM8909 SoC. In practice
the necessary power domains vary depending on the actual PMIC the SoC
was combined with. With PM8909 the VDD_APC power domain is shared with
VDD_CX so the RPM firmware handles all voltage adjustments, while with
PM8916 and PM660 Linux is responsible to do adaptive voltage scaling
of a dedicated CPU regulator using CPR.

Signed-off-by: Stephan Gerhold <stephan.gerhold@...nkonzept.com>
---
Changes in v2:
- Reword commit messages based on discussion with Uffe
- Use generic power domain name "perf" (Uffe)
- Fix pm_runtime error handling (Uffe)
- Add allocation cleanup patch as preparation
- Fix ordering of qcom,msm8909 compatible (Konrad)
- cpufreq-dt-platdev blocklist/dt-bindings patches were applied already
- Link to v1: https://lore.kernel.org/r/20230912-msm8909-cpufreq-v1-0-767ce66b544b@kernkonzept.com

---
Stephan Gerhold (3):
      cpufreq: qcom-nvmem: Simplify driver data allocation
      cpufreq: qcom-nvmem: Enable virtual power domain devices
      cpufreq: qcom-nvmem: Add MSM8909

 drivers/cpufreq/qcom-cpufreq-nvmem.c | 124 +++++++++++++++++++++++++----------
 1 file changed, 90 insertions(+), 34 deletions(-)
---
base-commit: 2e12b516f5e6046ceabd4d24e24297e4d130b148
change-id: 20230906-msm8909-cpufreq-dff238de9ff3

Best regards,
-- 
Stephan Gerhold <stephan.gerhold@...nkonzept.com>
Kernkonzept GmbH at Dresden, Germany, HRB 31129, CEO Dr.-Ing. Michael Hohmuth