Messages in this thread | | | Date | Sun, 14 Jan 2007 16:38:01 -0800 | From | Philip Langdale <> | Subject | Re: [RFC][PATCH] MMC: Major restructuring and cleanup |
| |
Pierre Ossman wrote: > > Eeeeww... This is a problem as the SD spec. clearly states the order of > init commands. So I wouldn't be surprised if we find SD cards that choke > on the MMC init sequence. > > I guess what we lose by not supporting these is 8 bit data bus, but as > we do not currently have a controller for that I think the point is moot.
Hrm. Even the MMC 4.1 App Note describes a unified init sequence where SD is checked first.
So, these cards are essentially useless then. The number of hosts that support MMC 4 but not SD can probably be counted on no hands. :-)
--phil - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |