• Tony Lindgren's avatar
    ARM: dts: omap4-droid4: Fix emmc errors seen on some devices · 2d59bb60
    Tony Lindgren authored
    Otherwise we can get the following errors occasionally on some devices:
    
    mmc1: tried to HW reset card, got error -110
    mmcblk1: error -110 requesting status
    mmcblk1: recovery failed!
    print_req_error: I/O error, dev mmcblk1, sector 14329
    ...
    
    I have one device that hits this error almost on every boot, and another
    one that hits it only rarely with the other ones I've used behave without
    problems. I'm not sure if the issue is related to a particular eMMC card
    model, but in case it is, both of the machines with issues have:
    
    # cat /sys/class/mmc_host/mmc1/mmc1:0001/manfid \
    /sys/class/mmc_host/mmc1/mmc1:0001/oemid \
    /sys/class/mmc_host/mmc1/mmc1:0001/name
    0x000045
    0x0100
    SEM16G
    
    and the working ones have:
    
    0x000011
    0x0100
    016G92
    
    Note that "ti,non-removable" is different as omap_hsmmc_reg_get() does not
    call omap_hsmmc_disable_boot_regulators() if no_regulator_off_init is set.
    And currently we set no_regulator_off_init only for "ti,non-removable" and
    not for "non-removable". It seems that we should have "non-removable" with
    some other mmc generic property behave in the same way instead of having to
    use a non-generic property. But let's fix the issue first.
    
    Fixes: 7e2f8c0a ("ARM: dts: Add minimal support for motorola droid 4
    xt894")
    Cc: Marcel Partap <mpartap@gmx.net>
    Cc: Merlijn Wajer <merlijn@wizzup.org>
    Cc: Michael Scott <hashcode0f@gmail.com>
    Cc: NeKit <nekit1000@gmail.com>
    Cc: Pavel Machek <pavel@ucw.cz>
    Cc: Sebastian Reichel <sre@kernel.org>
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    2d59bb60
omap4-droid4-xt894.dts 18.2 KB