Currently, the mmc driver uses open ended multiple block read/write (CMD18/25+CMD12) commands and not use pre-defined multiple block read/write (CMD23+CMD18/25) commands.
According to the feedback from some MMC/SD device vendors, they prefer the pre-defined multiple block read/write commands since it gives the device a chance to do some internal optimization. Also I found on the latest eMMC 4.5 Spec, quite a few new features requires using of CMD23. That means, these new features can not be implemented with the open ended multiple block read/write commands. So, the question is, why the current mmc driver does not use the pre-defined multiple block read/write commands? Any comments? Thanks. Regards, Yunpeng -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
