linux-kernel - [PATCH v8 0/9] Couple improvements for Tegra clk driver

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Message-Id: <20210516163041.12818-1-digetx@gmail.com>
Date:   Sun, 16 May 2021 19:30:32 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>
Cc:     Rob Herring <robh+dt@...nel.org>, linux-tegra@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v8 0/9] Couple improvements for Tegra clk driver

This series fixes couple minor standalone problems of the Tegra clk
driver and adds new features.

Changelog:

v8: - Replaced division with a shift, which was suggested by Michał Mirosław
      in a comment to "Handle thermal DIV2 CPU frequency throttling" v7 patch.
      Cortex A9 CPUs don't have hardware divider and shifting is a minor
      improvement here, nevertheless it's good to have it.

    - Added new patch "Don't deassert reset on enabling clocks", which I
      accidentally forgot to include in v7. Previously sound driver
      was a blocker for this patch, the sound is fixed now in v5.13. The
      patch itself is needed for maintaining proper clk/reset sequences
      by PMC and other drivers.

v7: - Added r-b from Rob Herring to the schema patch which he gave to v6.

    - Dropped the MAINTAINERS-update patch. Previously Peter said on IRC
      that he doesn't have time on the tegra-clk driver anymore and approved
      the patch, but then he refused to ack the v6 patch, saying that he
      is not reading mailing lists. So I don't feel comfortable with that
      patch. Peter could send it by himself if will be necessary.

    - Added these new patches:

        clk: tegra: cclk: Handle thermal DIV2 CPU frequency throttling
        clk: tegra: Mark external clocks as not having reset control

      I sent out the new Tegra30 thermal sensor driver and now CPU clock
      could be throttled by the sensor hardware [1]. The first patch adds
      support for reporting of the throttled frequency properly.

      [1] https://patchwork.ozlabs.org/project/linux-tegra/list/?series=243126

      During of debugging sound issues of Asus Transformer devices, I noticed
      that the external clocks are missing the no-reset flag. The second
      patch fixes it.

v6: - Made a small improvement and corrected a typo in patch
      "Fix refcounting of gate clocks" that were spotted by
      Michał Mirosław.

v5: - Corrected example in the schema binding to silence dt_binding_check
      warning.

    - The Tegra124 binding is factored out into standalone binding since
      Tegra124 has properties that aren't used by other SoCs and I couldn't
      figure out how to make them conditional in schema.

v4: - Added new patch that converts DT bindings to schema.

v3: - Added acks from Thierry Reding that he gave to v2.

    - Added new patch "clk: tegra: Don't allow zero clock rate for PLLs".

v2: - Added these new patches:

      clk: tegra: Halve SCLK rate on Tegra20
      MAINTAINERS: Hand Tegra clk driver to Jon and Thierry

v1: - Collected clk patches into a single series.

Dmitry Osipenko (9):
  clk: tegra30: Use 300MHz for video decoder by default
  clk: tegra: Fix refcounting of gate clocks
  clk: tegra: Ensure that PLLU configuration is applied properly
  clk: tegra: Halve SCLK rate on Tegra20
  clk: tegra: Don't allow zero clock rate for PLLs
  clk: tegra: cclk: Handle thermal DIV2 CPU frequency throttling
  clk: tegra: Mark external clocks as not having reset control
  clk: tegra: Don't deassert reset on enabling clocks
  dt-bindings: clock: tegra: Convert to schema

 .../bindings/clock/nvidia,tegra114-car.txt    |  63 ----------
 .../bindings/clock/nvidia,tegra124-car.txt    | 107 ----------------
 .../bindings/clock/nvidia,tegra124-car.yaml   | 115 ++++++++++++++++++
 .../bindings/clock/nvidia,tegra20-car.txt     |  63 ----------
 .../bindings/clock/nvidia,tegra20-car.yaml    |  69 +++++++++++
 .../bindings/clock/nvidia,tegra210-car.txt    |  56 ---------
 .../bindings/clock/nvidia,tegra30-car.txt     |  63 ----------
 drivers/clk/tegra/clk-periph-gate.c           |  80 +++++++-----
 drivers/clk/tegra/clk-periph.c                |  11 ++
 drivers/clk/tegra/clk-pll.c                   |  12 +-
 drivers/clk/tegra/clk-tegra-periph.c          |   6 +-
 drivers/clk/tegra/clk-tegra-super-cclk.c      |  16 ++-
 drivers/clk/tegra/clk-tegra20.c               |   6 +-
 drivers/clk/tegra/clk-tegra30.c               |   6 +-
 drivers/clk/tegra/clk.h                       |   4 -
 15 files changed, 272 insertions(+), 405 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra114-car.txt
 delete mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra124-car.txt
 create mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra124-car.yaml
 delete mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra20-car.txt
 create mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
 delete mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra210-car.txt
 delete mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra30-car.txt

-- 
2.30.2