From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Babic Date: Wed, 22 Apr 2015 14:42:10 +0200 Subject: [U-Boot] [PATCH] arm: mx6: ddr: add pd_fast_exit flag to system information In-Reply-To: <1428105172-14715-1-git-send-email-tharvey@gateworks.com> References: <1428105172-14715-1-git-send-email-tharvey@gateworks.com> Message-ID: <55379722.5060209@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 04/04/2015 01:52, Tim Harvey wrote: > DDR3 has a special Precharge power-down mode: fast-exit vs slow-exit. > > In slow-exit mode the DLL is off but in some quiescent state that makes it easy > to turn on again in tXPDLL cycles (about 10tCK) vs the full tDLLK (512tCK). > In fast-exist mode the DLL is maintained such that it is ready again in about > 3tCK. > > Signed-off-by: Tim Harvey > --- Applied to u-boot-imx, thanks ! Best regards, Stefano Babic -- ===================================================================== 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 =====================================================================