linux-kernel - Re: [PATCH v6 3/5] dt-bindings: iio: magnetometer: ak8975: add gpio reset support

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Message-ID: <CACRpkdZo4PsC9Y8seMfS33escA6ZVKWwnbW2BCFOKiX2gY8RDw@mail.gmail.com>
Date:   Tue, 26 May 2020 11:22:07 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Jonathan Albrieux <jonathan.albrieux@...il.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Hartmut Knaack <knaack.h@....de>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        "open list:IIO SUBSYSTEM AND DRIVERS" <linux-iio@...r.kernel.org>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v6 3/5] dt-bindings: iio: magnetometer: ak8975: add gpio
 reset support

On Mon, May 25, 2020 at 5:13 PM Jonathan Albrieux
<jonathan.albrieux@...il.com> wrote:

> Add reset-gpio support.
>
> 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 datasheet says that, if not used, reset pin should be connected
> to VID. This patch emulates this situation.
>
> Signed-off-by: Jonathan Albrieux <jonathan.albrieux@...il.com>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij