On 05/04/2016 15:43, Tom Rini wrote: > On Tue, Apr 05, 2016 at 04:53:28PM +0800, Peng Fan wrote: >> Hi Tom, >> >> I know this already merged to i.mx tree. I still have a question for the >> tIH-CA violation. > > It's not in mainline 'tho so it can always come out :)
Right - it is still in u-boot-imx, and I can revert it before my PR. > >> In my side, the value is ok. clk is 400MHz. >> (0x30 * 256.0) * (1000000000000.0/400000000.0) = 468.75ps. >> And according to spec, to 800M date rate, the minimum tIH value is 290ps. >> >> So I wonder how in your side it is tIH-CA violation. > > The board we measured this on is based on the mx6slevk and this > particular part of the board (layout, etc) is unchanged. Micron put the > board under analysis and measured these violations (along with that we > don't issue a reset before configuring CS1, I still might try and push > that change up for the EVK at least, not armadillo tho). Stefano -- ===================================================================== DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot