• Peter Griffin's avatar
    mmc: sdhci-st: Update the quirks for this controller. · 4e187d31
    Peter Griffin authored
    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: default avatarPeter Griffin <peter.griffin@linaro.org>
    Signed-off-by: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
    Acked-by: default avatarMaxime Coquelin <maxime.coquelin@st.com>
    Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
    4e187d31
sdhci-st.c 14 KB