From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Babic Date: Tue, 5 Apr 2016 16:01:11 +0200 Subject: [U-Boot] [PATCH 2/2] mx6slevk: imximage.cfg: update to fix tINIT3 and tIH-CA violations In-Reply-To: <20160405134311.GD23166@bill-the-cat> References: <1459547691-7462-1-git-send-email-trini@konsulko.com> <1459547691-7462-3-git-send-email-trini@konsulko.com> <57015156.7000902@denx.de> <20160403180605.GL23166@bill-the-cat> <20160405085326.GA30800@linux-7smt.suse> <20160405134311.GD23166@bill-the-cat> Message-ID: <5703C527.20109@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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: sbabic at denx.de =====================================================================