From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexandre Belloni Subject: [PATCH 0/2] ARM: at91: properly handle LPDDR poweroff Date: Fri, 7 Oct 2016 18:34:25 +0200 Message-ID: <20161007163427.11454-1-alexandre.belloni@free-electrons.com> Return-path: Received: from down.free-electrons.com ([37.187.137.238]:37450 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757226AbcJGQel (ORCPT ); Fri, 7 Oct 2016 12:34:41 -0400 Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Sebastian Reichel , Dmitry Eremin-Solenikov Cc: Nicolas Ferre , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Alexandre Belloni Hi, This patch set improves LPDDR support on SoCs using the Atmel MPDDR controller. LPDDR memoris can only handle up to 400 uncontrolled power offs in their life. The proper power off sequence has to be applied before shutting down the SoC. I'm not too happy with the code duplication but this is a design choice that has been made before because both shitdown controler are really different appart from the shutdown itself. I guess it is still better than slowly killing the LPDDR. Alexandre Belloni (2): ARM: at91: define LPDDR types power/reset: at91-poweroff: timely shitdown LPDDR memories drivers/power/reset/at91-poweroff.c | 52 +++++++++++++++++++++++++++++++- drivers/power/reset/at91-sama5d2_shdwc.c | 48 ++++++++++++++++++++++++++++- include/soc/at91/at91sam9_ddrsdr.h | 3 ++ 3 files changed, 101 insertions(+), 2 deletions(-) -- 2.9.3