Re: mmc_test

Re: mmc_test

[Adrian Hunter]

On 14/02/12 08:41, Shridhar Rasal wrote:
> [sorry for spamming you]
> 
> Dear Adrian,
> 
> I am working on K3.1. 
> I am trying to run mmc_test on my set-up. I have added mmc_test as a driver.
> But sysfs entries(test/testlist) are getting created only for any of SDIO host.

mmc_test will not work if mmc_block has already been given all the
MMC devices.

You can always switch between mmc_test and mmc_block by
unbinding / binding e.g.


# ls -al /sys/bus/mmc/drivers/mmcblk
drwxr-xr-x    2 root     0               0 Jan  1 00:00 .
drwxr-xr-x    4 root     0               0 Jan  1 00:00 ..
--w-------    1 root     0            4096 Jan  1 00:01 bind
lrwxrwxrwx    1 root     0               0 Jan  1 00:01 mmc0:0001 ->
../../../../devices/platform/mmci-omap-hs.1/mmc_host/mmc0/mmc0:0001
--w-------    1 root     0            4096 Jan  1 00:01 uevent
--w-------    1 root     0            4096 Jan  1 00:01 unbind

# echo mmc0:0001 > /sys/bus/mmc/drivers/mmcblk/unbind

# echo mmc0:0001 > /sys/bus/mmc/drivers/mmc_test/bind
[  128.221313] mmc_test mmc0:0001: Card claimed for testing.


> 
> I digged  further and found that,  
> 1.  mmc_test_probe is invoked only in case of SDIO and not for other hosts.
> 2.  this is because of from mmc_bus_probe( ), only for SDIO host -
> mmc_test_probe () invoked and for other hosts - mmc_blk_probe () invoked.
> 
> 
> - What can be reason for this?
> - Am I missing some patches? 
> 
> Also, please let me know, where can I post such mmc related queries.

MMC mailing list:

	http://vger.kernel.org/vger-lists.html#linux-mmc

Re: mmc_test

[Shashidhar Hiremath]

Hi,
The mmc_test runs fine for SD cards as well. As Adrian said, if the
block is un-binded correctly, it should work for any card.
Another point , may not be worthy here is modification in make file
mmc_test.o needs to compiled before block.o. Sometimes I have seen
cases where this has solved the issue.

On Tue, Feb 14, 2012 at 1:20 PM, Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> On 14/02/12 08:41, Shridhar Rasal wrote:
> > [sorry for spamming you]
> >
> > Dear Adrian,
> >
> > I am working on K3.1.
> > I am trying to run mmc_test on my set-up. I have added mmc_test as a driver.
> > But sysfs entries(test/testlist) are getting created only for any of SDIO host.
>
> mmc_test will not work if mmc_block has already been given all the
> MMC devices.
>
> You can always switch between mmc_test and mmc_block by
> unbinding / binding e.g.
>
>
> # ls -al /sys/bus/mmc/drivers/mmcblk
> drwxr-xr-x    2 root     0               0 Jan  1 00:00 .
> drwxr-xr-x    4 root     0               0 Jan  1 00:00 ..
> --w-------    1 root     0            4096 Jan  1 00:01 bind
> lrwxrwxrwx    1 root     0               0 Jan  1 00:01 mmc0:0001 ->
> ../../../../devices/platform/mmci-omap-hs.1/mmc_host/mmc0/mmc0:0001
> --w-------    1 root     0            4096 Jan  1 00:01 uevent
> --w-------    1 root     0            4096 Jan  1 00:01 unbind
>
> # echo mmc0:0001 > /sys/bus/mmc/drivers/mmcblk/unbind
>
> # echo mmc0:0001 > /sys/bus/mmc/drivers/mmc_test/bind
> [  128.221313] mmc_test mmc0:0001: Card claimed for testing.
>
>
> >
> > I digged  further and found that,
> > 1.  mmc_test_probe is invoked only in case of SDIO and not for other hosts.
> > 2.  this is because of from mmc_bus_probe( ), only for SDIO host -
> > mmc_test_probe () invoked and for other hosts - mmc_blk_probe () invoked.
> >
> >
> > - What can be reason for this?
> > - Am I missing some patches?
> >
> > Also, please let me know, where can I post such mmc related queries.
>
> MMC mailing list:
>
>        http://vger.kernel.org/vger-lists.html#linux-mmc
>
>
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--
regards,
Shashidhar Hiremath