Bastien Nocera <had...@hadess.net> writes: > On Mon, 2016-09-12 at 17:48 +0200, Hanno Zulla wrote: >> Hi, >> >> > Longer term I think it makes sense to add SDIO support to rtl8xxxu. >> > The >> > differences between the USB version and the SDIO version are rather >> > small. >> >> >> This is beyond my expertise, sadly. >> >> Is there a good blueprint / example of a previous case where a USB >> driver had SDIO support added that one might learn from? > > I don't know on top of my head, sorry. Best look in the kernel sources > directly.
The issues I am aware of is to start out changing the register access macros into function pointers and stick them all into the fileops structure. Provide a set of SDIO ones to match the USB ones. Then you will need some code to detect the device, as that part will obviously be different from the USB device detection. I know there are a few issues to look out for in the hw register init files to look out for too, that does some special casing for SDIO, but that should be limited. I am happy to point someone in the right direction on that when they get to that. Cheers, Jes
