On Tue, 2017-07-04 at 16:12 +0200, Stefan Roese wrote: > > 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)? If it utilizes ACPI (card detection) I'm not sure you can magically get it working, though it worth to try. -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- 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
