On Fri, Aug 17, 2012 at 1:42 PM, Benoît Thébaudeau benoit.thebaudeau@advansee.com wrote:
Dear Matt Sealey,
These pad settings are broken. All the pins of each peripheral should not always have the same pad settings. E.g., UART input pins should have their pull-up enabled in order to avoid spurious character input if these pins are left floating from time to time. The same applies to eCSPI.
I'm not going to comment on the quality of the pad settings, but since MX51 arrived in any kernel these have been the pad settings for *all* MX51, MX53, MX6 boards and in the case of MX6 are applied in U-Boot right now for example on mx6qsabrelite if not the others too. These settings are in device trees now, too.
If you want to "correct" years of reliable operation in U-Boot, go ahead, and fix Linux while you're at it. I'm just porting the status quo.