Hi Andy,
On 04.07.2017 15:53, Andy Shevchenko wrote:
On Tue, 2017-07-04 at 14:53 +0200, Stefan Roese wrote:
Hi,
we are currently investigating, if its possible to connect a SDIO
device (WLAN module) to the SD-card interface "SD3" of the BayTrail
SoC instead of the SDIO interface "SD2". The BayTrail manual states,
that the SDIO interface is capable of connecting SDIO devices. Is
this also possible for the SD-card interface "SD3", even if its not
explicitly mentioned in the manual? If not, why is this not possible?
Any insight on this would be really helpful.
Hmm... I have no documentation for SD/SDIO/eMMC for BayTrail except the
public one. Internally I found some charts that shows similarities
between two. So, taking that into consideration I would suggest to try
it out on real hardware (MinnowBoard MAX, for example), only impediment
I can see is the absence of support in the drivers in Linux OS. If you
need it only in U-Boot, you perhaps may fix it easily.
Its not only for U-Boot unfortunately. Do you think, a quick test in
Linux should be possible by simply swapping the PCI device IDs in
sdhci-pci.core.c (PCI_DEVICE_ID_INTEL_BYT_SDIO vs.
PCI_DEVICE_ID_INTEL_BYT_SD)?
Thanks,
Stefan
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