On Monday 12 October 2015 12:11 PM, Muni Sekhar wrote:
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
Hello Muni Sekhar,
You have to find the device node that has been created, In the example
it was "mmc0:b368"
and appropriately modify the echo statement and every other statement
where it is referenced
Thanks & Regards
--
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
