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Date:   Thu, 3 May 2018 20:50:37 +0200
From:   Andreas Kemnade <andreas@kemnade.info>
To:     "H. Nikolaus Schaller" <hns@goldelico.com>
Cc:     Johan Hovold <johan@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Arnd Bergmann <arnd@arndb.de>, Pavel Machek <pavel@ucw.cz>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH 4/7] dt-bindings: gnss: add u-blox binding
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On Thu, 3 May 2018 11:35:21 +0200
H. Nikolaus Schaller <hns@goldelico.com> wrote:


> I have realized that the w2sg0004 is an exception (although a Sirf chip)
> that it does not provide a WAKEUP signal. And another significant
> difference is that we have to keep the serdev UART enabled even if there
> is no user-space client. Otherwise we are not able to detect unexpected
> activity. So we unfortunately can't move serdev open/close into the .open
> and .close ops but need to open it in probe.
>=20
how much power does it use to keep the uart enabled? Or should it
better be reprogrammed as gpio?

Regards,
Andreas

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