From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikita Kiryanov Date: Mon, 04 Aug 2014 15:49:38 +0300 Subject: [U-Boot] [PATCH 10/18] arm: mx6: ddr: configure MMDC for slow_pd In-Reply-To: References: <1407051288-17324-1-git-send-email-nikita@compulab.co.il> <1407051288-17324-11-git-send-email-nikita@compulab.co.il> Message-ID: <53DF8162.8090609@compulab.co.il> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 04/08/14 08:42, Tim Harvey wrote: > On Sun, Aug 3, 2014 at 12:34 AM, Nikita Kiryanov wrote: >> According to MX6 TRM, both MMDC and DRAM should be configured to >> the same powerdown precharge. Currently, mx6_dram_cfg() >> configures MMDC for fast pd, and the DRAM for slow pd. > > Nikita, > > I'm inclined to agree with you. A glance at some of the existing > non-spl board config's show this same discrepancy which probably comes > form an error in the IMX DDR3 Script Aid spreadsheet > (https://community.freescale.com/docs/DOC-94917). > > I would at least add to the description the fact that the precharge pd > is MR0 bit12 for DRAM and the current value of 0 indicates 'Slow exit > (DLL off)'. I've asked our Freescale FAE for clarification to see if > the spreadsheet is in error. OK, I'll add it once the FAE confirms the error. > > Regards, > > Tim >