linux-kernel - [PATCH v2 0/3] iio: magnetometer: ak8975: Add gpio reset support

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Message-Id: <20200519065749.4624-1-jonathan.albrieux@gmail.com>
Date:   Tue, 19 May 2020 08:57:40 +0200
From:   Jonathan Albrieux <jonathan.albrieux@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jonathan Albrieux <jonathan.albrieux@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS),
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hartmut Knaack <knaack.h@....de>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-iio@...r.kernel.org (open list:IIO SUBSYSTEM AND DRIVERS),
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 0/3] iio: magnetometer: ak8975: Add gpio reset support

Convert documentation from txt format to yaml. Add documentation about
reset-gpio. 

Deassert reset on ak8975_power_on, assert reset on ak8975_power_off.

Without reset's deassertion during ak8975_power_on, driver's probe fails
on ak8975_who_i_am while checking for device identity for AK09911 chip

AK09911 has an active low reset gpio to handle register's reset.
AK09911 datasheed says that, if not used, reset pin should be connected
to VID. This patch emulates this situation

Jonathan Albrieux (3):
  dt-bindings: iio: magnetometer: ak8975: convert txt format to yaml
  dt-bindings: iio: magnetometer: ak8975: add gpio reset support
  iio: magnetometer: ak8975: Add gpio reset support

 .../bindings/iio/magnetometer/ak8975.txt      | 30 --------
 .../bindings/iio/magnetometer/ak8975.yaml     | 70 +++++++++++++++++++
 drivers/iio/magnetometer/ak8975.c             | 22 +++++-
 3 files changed, 90 insertions(+), 32 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt
 create mode 100644 Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml

-- 
2.17.1