linux-kernel - Re: [PATCH] mfd: da9063: occupy second I2C address, too

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Message-ID: <20190620092116.y7aqun6jjjn4mgow@katana>
Date:   Thu, 20 Jun 2019 11:21:16 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Steve Twiss <stwiss.opensource@...semi.com>
Cc:     "wsa+renesas@...g-engineering.com" <wsa+renesas@...g-engineering.com>,
        "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        "kieran.bingham+renesas@...asonboard.com" 
        <kieran.bingham+renesas@...asonboard.com>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "peda@...ntia.se" <peda@...ntia.se>,
        Support Opensource <Support.Opensource@...semi.com>
Subject: Re: [PATCH] mfd: da9063: occupy second I2C address, too


> Is this a safety clause? What I mean is, shouldn't the hardware design make
> sure there are not two devices located on the same I2C bus with the same slave
> address?

It is more about preventing userspace to accidently access this address,
and thus the registers behind it.


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