On Tuesday, December 10, 2013 at 07:29:04 PM, Mark Brown wrote: > On Tue, Dec 10, 2013 at 07:22:10PM +0100, Marek Vasut wrote: > > On Tuesday, December 10, 2013 at 05:11:43 PM, Mark Brown wrote: > > > There is some stuff that pushes up into the controller in that while > > > the device is in memory mapped mode as far as I can tell it's not safe > > > to do other accesses so if someone's put more than one device on the > > > SPI bus we need to handle interactions there. > > > > OK, so it's either-or . That seems OK, you might want to have two drivers > > for this ip block, one to handle it as a SPI block and one to handle it > > as a SPI-NOR block. ... that is of course, if these two modes can't work > > together. > > Or the client disables the memory map when it's not actively being used > and the stops other transfers starting while the mapping is in place. > I'd expect we'll have to cope with shared use at some point, hardware > engineers will probably build such systems. Aren't we fixing the problem at the wrong place ? Maybe it's about time to fix the engineers ;-) Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
