> I'm developing an SPI- bus >MMC/SD block driver translation layer. Another one? There's already been significant work in that area. See for example
http://marc.theaimsgroup.com/?l=linux-kernel&m=117000652529003&w=2 Which admittedly didn't behave when I just put it onto my test rig, but seems nonetheless to be a significant step forward. It's not like everyone has hardware that can use such a driver after all! > As part of this layer the write protect and card detect lines need to be read. > The method for determining the state of these lines will be board specific. Example, one usually wants card detect to be an IRQ, to avoid polling... > Is it appropriate to pass a function pointer through a platform device > (declared in the mach initialization) to implement card_available and > write_protect function calls? That's how it's done in that patch. The model being what the PXA MMC/SD card driver does, since that's the most generic model I found ... handling for example systems which need to poll for card detect, as well as ones that can use real gpio based IRQs. The mmc_spi driver doesn't need to know which kind of platform it's got. - Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
