From mboxrd@z Thu Jan 1 00:00:00 1970 From: stefan.wahren@i2se.com (Stefan Wahren) Date: Sat, 27 Aug 2016 21:15:22 +0200 (CEST) Subject: [PATCH RFC 0/3] mmc: mxs-mmc: Implement DDR support In-Reply-To: <1470488140-10104-1-git-send-email-stefan.wahren@i2se.com> References: <1470488140-10104-1-git-send-email-stefan.wahren@i2se.com> Message-ID: <1082892691.24336.3dd5cc50-579f-4f46-b1de-7868392729ec.open-xchange@email.1und1.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Ulf, > Stefan Wahren hat am 6. August 2016 um 14:55 > geschrieben: > > > Based on these discussions: [1], [2] this patch series implements > DDR support for the MXS MMC host driver. This feature has never been > ported from the vendor kernel. > > It has been tested on a i.MX28 board with eMMC which is currently > not in mainline (Duckbill 2). > > * without DDR support > dd if=/dev/zero of=test bs=8k count=10000 > 81920000 bytes (82 MB) copied, 14.3321 s, 5.7 MB/s > > * with DDR support: > dd if=/dev/zero of=test bs=8k count=10000 > 81920000 bytes (82 MB) copied, 13.4781 s, 6.1 MB/s > > [1] - http://www.spinics.net/lists/linux-mmc/msg32285.html > [2] - http://www.spinics.net/lists/linux-mmc/msg34418.html do you want to add some comments about this series? Regards Stefan > > Stefan Wahren (3): > DT: bindings: mmc: Add property for 3.3V only support > mmc: core: add new cap for 3.3V only DDR MMCs > mmc: mxs-mmc: Implement DDR support > > Documentation/devicetree/bindings/mmc/mmc.txt | 7 +++++-- > drivers/mmc/core/host.c | 2 ++ > drivers/mmc/core/mmc.c | 6 ++++++ > drivers/mmc/host/mxs-mmc.c | 22 ++++++++++++++++++++++ > include/linux/mmc/host.h | 1 + > 5 files changed, 36 insertions(+), 2 deletions(-) > > -- > 1.7.9.5