linux-kernel - Re: [RFC 0/4] Add support for the Gateworks System Controller

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Message-ID: <20180228144424.GC12303@lunn.ch>
Date:   Wed, 28 Feb 2018 15:44:24 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Tim Harvey <tharvey@...eworks.com>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mark Brown <broonie@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-input@...r.kernel.org
Subject: Re: [RFC 0/4] Add support for the Gateworks System Controller

On Tue, Feb 27, 2018 at 05:21:10PM -0800, Tim Harvey wrote:
> This series adds support for the Gateworks System Controller used on Gateworks
> Laguna, Ventana, and Newport product families.
> 
> The GSC is an MSP430 I2C slave controller whose firmware embeds the following
> features:
>  - I/O expander (16 GPIO's emulating a PCA955x)
>  - EEPROM (enumating AT24)
>  - RTC (enumating DS1672)

Hi Tim

Maybe it is in these patches, and i missed it....

How do these emulated devices work? Does the controller respond to
different addresses for these different emulated devices? Or is it an
I2c bus mux?

    Andrew