From: Eric Anholt <eric@anholt.net>
To: Gerd Hoffmann <kraxel@redhat.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
Jon Mason <jonmason@broadcom.com>,
linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
Stefan Wahren <stefan.wahren@i2se.com>
Subject: Re: [PATCH 1/2] mmc: sdhci-iproc: Apply caps from bcm2835-mmc driver
Date: Tue, 03 Jan 2017 10:27:08 -0800 [thread overview]
Message-ID: <87lgusngn7.fsf@eliezer.anholt.net> (raw)
In-Reply-To: <1483111474-29907-2-git-send-email-stefan.wahren@i2se.com>
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Stefan Wahren <stefan.wahren@i2se.com> writes:
> Since the mmc module on bcm2835 neither provide a capabilities register nor
> free documentation we must rely on the downstream implementation [1].
Yeah, caps reg is wired to 0, but it can do high speed.
Since we're VDD_330 only, I'm not sure the driver type flags do
anything, but I'm still good with having consistency.
Reviewed-by: Eric Anholt <eric@anholt.net>
Interested in porting over the DMA support? :)
I also noticed that the emmc wrapper module claims it can run with a
clock from 50-100mhz, and the arasan says it can run at up to 50, 52, or
208mhz depending on SD/MMC mode. Could we get a boost from running the
module at a higher clock rate?
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next prev parent reply other threads:[~2017-01-03 18:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-30 15:24 [PATCH 0/2] mmc: sdhci-iproc: Improve bcm2835 performance Stefan Wahren
2016-12-30 15:24 ` [PATCH 1/2] mmc: sdhci-iproc: Apply caps from bcm2835-mmc driver Stefan Wahren
2017-01-03 18:27 ` Eric Anholt [this message]
2017-01-03 20:23 ` Stefan Wahren
2017-01-04 18:16 ` Eric Anholt
2017-01-05 9:53 ` Adrian Hunter
2016-12-30 15:24 ` [PATCH 2/2] mmc: sdhci-iproc: Increase max_blk_size for bcm2835 Stefan Wahren
2017-01-03 18:04 ` Eric Anholt
2017-01-04 18:47 ` Scott Branden
2017-01-05 9:53 ` Adrian Hunter
2017-01-10 15:38 ` [PATCH 0/2] mmc: sdhci-iproc: Improve bcm2835 performance Ulf Hansson
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