On Mon, Oct 12, 2015 at 11:40 AM, Sheetal <sheetal.tigadoli@xxxxxxxxx> wrote: > > On Monday 12 October 2015 11:25 AM, Muni Sekhar wrote: >> >> Hi , >> >> >> I tried to use the MMC host test driver (mmc_test.ko) for testing SD >> Host controller hardware. When I load the driver I noticed that >> mmc_test_probe() not getting called. >> >> Could anyone specify the exact usage of mmc_test.ko? >> > Hello Muni Sekhar, > > I think the following might help you in using MMC_TEST.KO Module > > 0. insmod mmc_test.ko > 1. unbind the mmc block driver > echo mmc0:b368 > /sys/bus/mmc/drivers/mmcblk/unbind > 2. bind the mmc_test driver > echo mmc0:b368 > /sys/bus/mmc/drivers/mmc_test/bind > 3. mount the debugfs if you don't mount for debugfs > mount -t debugfs none /sys/kernel/debug > 4. After mount, you can see the "/sys/kernel/debug/mmc0/mmc0:b368/test" > 5. echo "test number" > /sys/kernel/debug/mmc0/mmc0\:b368/test > you can see the "test number" using the "cat > /sys/kernel/debug/mmc0/mmc0\:b368/testlist" > > The above has been copied straigtly from thelink > <http://forum.kernelnewbies.org/read.php?12,1991,116405#msg-116405> > Hello Sheetal, Thanks for the quick reply. I followed the steps but nmcblk unbind fails “bash: echo: write error: No such device”. Any idea about this failure? # echo mmc0:b368 > /sys/bus/mmc/drivers/mmcblk/unbind bash: echo: write error: No such device # ls -al /sys/bus/mmc/drivers/mmcblk total 0 drwxr-xr-x 2 root root 0 Oct 12 11:49 . drwxr-xr-x 4 root root 0 Oct 12 11:49 .. --w------- 1 root root 4096 Oct 12 11:52 bind --w------- 1 root root 4096 Oct 12 11:49 uevent --w------- 1 root root 4096 Oct 12 11:52 unbind -- Thanks, Sekhar -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
