linux-kernel - Re: [PATCH] ARM: dts: rockchip: increase SD clock frequency on Radxa Rock

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Date:   Wed, 22 Mar 2017 17:47:41 +0100
From:   Heiko Stuebner <heiko@...ech.de>
To:     Alexander Kochetkov <al.kochet@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: rockchip: increase SD clock frequency on Radxa Rock

Hi,

Am Dienstag, 21. März 2017, 18:40:22 CET schrieb Alexander Kochetkov:
> The patch set SD clock frequency to maximum possible to SD-card
> (50MHz). This change actual clock frequency from 32MHz to 48MHz
> (speedup 1.5X).
> 
> Banner line before patch: 'mmc_host mmc0: Bus speed (slot 0) = 32000000Hz
> (slot req 50000000Hz, actual 32000000HZ div = 0)'.
> Banner line after patch: 'mmc_host mmc0: Bus speed (slot 0) = 96000000Hz
> (slot req 50000000Hz, actual 48000000HZ div = 1)'
> 
> Signed-off-by: Alexander Kochetkov <al.kochet@...il.com>

sorry, but I will not apply this patch at this time.

When testing on my radxarock with the card I always use upon entering the 
rootfs everything explodes with -110 errors, while without that patch the card 
runs stable as far as I can tell.

I also don't have the time to investigate further right now though.


Heiko