linux-kernel - Re: [PATCH 2/4] mmc: bcm2835: Add new driver for the internal SD controller.

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Date:   Fri, 27 Jan 2017 16:27:25 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Gerd Hoffmann <kraxel@...hat.com>
Cc:     linux-rpi-kernel@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Lee Jones <lee@...nel.org>, Eric Anholt <eric@...olt.net>,
        linux@...linux.org.uk,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Stefan Wahren <stefan.wahren@...e.com>
Subject: Re: [PATCH 2/4] mmc: bcm2835: Add new driver for the internal SD controller.

On 27 January 2017 at 12:36, Gerd Hoffmann <kraxel@...hat.com> wrote:
> From: Eric Anholt <eric@...olt.net>
>
> The 2835 has two SD controllers:  The Arasan SDHCI controller (supported
> by the iproc driver) and a custom SD controller.  This patch adds a
> driver for the custom SD controller.
>
> The custom controller runs faster, and driving the sdcard with the
> custom controller also allows to drive the rpi3 wifi with the iproc
> driver.
>

I don't understand this relationship. Is this somewhat configurable in runtime?

Is the WIFI module a removable SDIO card? So you can decide which
controller that is best suited to use? No?

Kind regards
Uffe