linux-kernel - [PATCH v2 0/2] extcon: Add extcon-regulator driver

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Date:   Thu,  5 May 2022 16:25:55 -0700
From:   Zev Weiss <zev@...ilderbeest.net>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>
Cc:     Zev Weiss <zev@...ilderbeest.net>, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        openbmc@...ts.ozlabs.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org
Subject: [PATCH v2 0/2] extcon: Add extcon-regulator driver

Hello,

This is a restructured v2 of a series adding support for
regulator-supplied power output connectors.

Changes since v1 [0, 1]:
 - Dropped regulator-external-output DT property [Mark]
 - Moved DT binding to connector/regulator-connector.yaml [Krzysztof]
 - Dropped EXTERNAL_GET type and other regulator-core changes

This driver aims to support hardware where a regulator supplies a
power output connector, such as a power outlet on a DC power
distribution unit (PDU).  (The specific system I'm targeting at the
moment is the Delta AHE-50DC Open19 power shelf [2], for which I'm
working on a port of OpenBMC.)

Patch 1 adds the regulator-connector DT binding, with a single
property specifying the regulator supplying the connector's output
power, and patch 2 adds an extcon driver (extcon-regulator).  The
driver currently doesn't actually do much extcon-wise, because the
AHE-50DC hardware is quite minimal and doesn't really offer much for
it to do, but if other similar devices in the future do have
additional functionality to support (such as a presence-detection
mechanism) the driver can be extended to add that.

Thanks,
Zev

[0] https://lore.kernel.org/openbmc/20220504065041.6718-1-zev@bewilderbeest.net/
[1] https://lore.kernel.org/openbmc/20220504065252.6955-1-zev@bewilderbeest.net/
[2] https://www.open19.org/marketplace/delta-16kw-power-shelf/

Zev Weiss (2):
  dt-bindings: connector: Add regulator-connector binding
  extcon: Add extcon-regulator driver

 .../ABI/testing/sysfs-driver-extcon-regulator |   8 ++
 .../connector/regulator-connector.yaml        |  38 +++++
 MAINTAINERS                                   |   8 ++
 drivers/extcon/Kconfig                        |   8 ++
 drivers/extcon/Makefile                       |   1 +
 drivers/extcon/extcon-regulator.c             | 133 ++++++++++++++++++
 6 files changed, 196 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-driver-extcon-regulator
 create mode 100644 Documentation/devicetree/bindings/connector/regulator-connector.yaml
 create mode 100644 drivers/extcon/extcon-regulator.c

-- 
2.36.0