linux-kernel - Re: [PATCH v4 5/7] arm64: set CONFIG_MMC

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Date:   Fri, 17 Mar 2017 17:07:17 -0700
From:   Eric Anholt <eric@...olt.net>
To:     Gerd Hoffmann <kraxel@...hat.com>,
        linux-rpi-kernel@...ts.infradead.org
Cc:     ulf.hansson@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        lee@...nel.org, stefan.wahren@...e.com, f.fainelli@...il.com,
        rjui@...adcom.com, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, linux@...linux.org.uk,
        catalin.marinas@....com, will.deacon@....com,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Gerd Hoffmann <kraxel@...hat.com>
Subject: Re: [PATCH v4 5/7] arm64: set CONFIG_MMC_BCM2835=y in defconfig

Gerd Hoffmann <kraxel@...hat.com> writes:

> We need to enable this controller so that we can switch the SD card's
> pinmux over to it by default, which will improve storage performance.
>
> Read access (dd with 64k blocks on rpi2):
>   CONFIG_MMC_SDHCI_IPROC: 11-12 MB/s
>   CONFIG_MMC_BCM2835:     19-20 MB/s
>
> Differences on write access are pretty much in the noise.
>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>

Now that the driver has been merged, I've merged the platform patches up
to this point.

Unfortunately, sending PRs to arm-soc that merge in branches from other
trees has failed in the past, so I won't be able to merge 6 and 7 for
4.12.  That said, it's a whole lot less that the various downstream
kernels will need to pull for the Pi3 than they've been carrying around
until now :)

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