From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Coquelin Subject: Re: [PATCH v2 6/8] mmc: sdhci-st: Update the quirks for this controller. Date: Tue, 3 Mar 2015 11:57:47 +0100 Message-ID: <54F593AB.5080400@st.com> References: <1424956227-18258-1-git-send-email-peter.griffin@linaro.org> <1424956227-18258-7-git-send-email-peter.griffin@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1424956227-18258-7-git-send-email-peter.griffin@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: Peter Griffin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patrice.chotard@st.com, srinivas.kandagatla@gmail.com, chris@printf.net, ulf.hansson@linaro.org Cc: lee.jones@linaro.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, peppe.cavallaro@st.com List-Id: devicetree@vger.kernel.org On 02/26/2015 02:10 PM, Peter Griffin wrote: > Some additional quirks need to be enabled now we support UHS > modes. This avoids some spurious warnings like > > "Got data interrupt 0x00000002 even though no data operation was in progress" > > Testing on stih410-b2120 board achieves the following speeds > with HS200 eMMC card. > > max-frequency = 200Mhz > /dev/mmcblk0p1: > Timing buffered disk reads: 270 MB in 3.02 seconds = 89.54 MB/sec > > max-frequency = 100Mhz > root@debian-armhf:~# hdparm -t /dev/mmcblk0p1 > /dev/mmcblk0p1: > Timing buffered disk reads: 210 MB in 3.00 seconds = 70.00 MB/sec > > max-frequency = 50Mhz > root@debian-armhf:~# hdparm -t /dev/mmcblk0p1 > /dev/mmcblk0p1: > Timing buffered disk reads: 118 MB in 3.00 seconds = 39.28 MB/sec > > This is better than the 3.10 kernel which achieves 77.59 MB/sec > at 200Mhz clock (same board/soc/eMMC). > > Signed-off-by: Peter Griffin > Signed-off-by: Giuseppe Cavallaro > --- > drivers/mmc/host/sdhci-st.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > Acked-by: Maxime Coquelin Thanks, Maxime