linux-kernel - [RFC PATCH v1 0/6] Introduce machine-specific regulators coupling API

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Date:   Sun, 14 Apr 2019 20:59:33 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v1 0/6] Introduce machine-specific regulators coupling API

Hello,

I was looking into how to properly implement regulators coupling for
NVIDIA Tegra SoC's and ended up with this patchset that introduces
machine-specific regulators coupling. Upstream kernel now has support
for a simple variants of regulators coupling in a form of limiting
maximum voltage spreading between two regulators, but that's not enough
for the case of Tegra SoC's. It's a bit difficult to support universally
all possible coupling restrictions in a form of device-tree description,
so here comes the machine-specific coupling API which allow platforms
to customize coupling algorithms.

Dmitry Osipenko (6):
  regulator: core: Introduce API for machine-specific regulators
    coupling
  regulator: core: Parse max-spread value per regulator couple
  regulator: core: Expose some of core functions
  regulator: core Bump MAX_COUPLED to 3
  soc/tegra: regulators: Add regulators coupler for Tegra20
  soc/tegra: regulators: Add regulators coupler for Tegra30

 drivers/regulator/core.c               |  89 +++++---
 drivers/regulator/of_regulator.c       |  49 ++--
 drivers/soc/tegra/Kconfig              |  12 +
 drivers/soc/tegra/Makefile             |   2 +
 drivers/soc/tegra/regulators-tegra20.c | 304 +++++++++++++++++++++++++
 drivers/soc/tegra/regulators-tegra30.c | 256 +++++++++++++++++++++
 include/linux/regulator/driver.h       |  14 +-
 include/linux/regulator/machine.h      |  22 +-
 8 files changed, 694 insertions(+), 54 deletions(-)
 create mode 100644 drivers/soc/tegra/regulators-tegra20.c
 create mode 100644 drivers/soc/tegra/regulators-tegra30.c

-- 
2.21.0