omap_hsmmc: Problem with SanDisk Extreme Pro MicroSDHC 1

omap_hsmmc: Problem with SanDisk Extreme Pro MicroSDHC 1

[Stefan Roese]

Hi!

I'm currently testing on an OMAP3530 board (tao3530 SOM with custom 
baseboard) with v3.14. I applied all the OMAP/pbias patch from Balaji 
and MMC/SDcard detection seemed to work reliably.

But now I noticed that the SanDisk Extreme Pro MicroSDHC 1 (8 GB) is not 
detected all the time. It seems that the card detected fails with 
timeout on (approx?) each 2nd reboot (via reset button). A quick check 
shows that the timeout happens in mmc_send_app_op_cond():

[    4.901275] mmc0: error -110 whilst initialising SD card
[    4.939849] mmc1: new SDIO card at address 0001

Is this a known issue? Any ideas on how to fix this?

Thanks,
Stefan

Re: omap_hsmmc: Problem with SanDisk Extreme Pro MicroSDHC 1

[Stefan Roese]

On 07.04.2014 15:47, Stefan Roese wrote:
> I'm currently testing on an OMAP3530 board (tao3530 SOM with custom
> baseboard) with v3.14. I applied all the OMAP/pbias patch from Balaji
> and MMC/SDcard detection seemed to work reliably.
>
> But now I noticed that the SanDisk Extreme Pro MicroSDHC 1 (8 GB) is not
> detected all the time. It seems that the card detected fails with
> timeout on (approx?) each 2nd reboot (via reset button). A quick check
> shows that the timeout happens in mmc_send_app_op_cond():
>
> [    4.901275] mmc0: error -110 whilst initialising SD card
> [    4.939849] mmc1: new SDIO card at address 0001
>
> Is this a known issue? Any ideas on how to fix this?

Just to let you know. I missed to add the "cd-gpios" property to the mmc 
DT node. With this addition the detection seems to work reliably.

Sorry for the noise,
Stefan