From mboxrd@z Thu Jan 1 00:00:00 1970 From: yoma sophian Subject: Re: how to enable suspend to ram for arm-64 bits Date: Mon, 22 Aug 2016 22:41:15 +0800 Message-ID: References: <06a4f0d7-9022-578d-99e0-ddcde31ed895@arm.com> <82ddd0e1-9ecc-5e54-e8ee-86f947fc0ecd@arm.com> <62cbf1a0-268a-f9f5-09af-c155a8a77508@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: Received: from mail-it0-f54.google.com ([209.85.214.54]:35525 "EHLO mail-it0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756087AbcHVOlQ (ORCPT ); Mon, 22 Aug 2016 10:41:16 -0400 Received: by mail-it0-f54.google.com with SMTP id x131so91602285ite.0 for ; Mon, 22 Aug 2016 07:41:16 -0700 (PDT) In-Reply-To: <62cbf1a0-268a-f9f5-09af-c155a8a77508@arm.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Sudeep Holla Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org hi Sudeep: >> Yes, I agree with you. >> But it may not mean the ONLY way for all armv8 platform that support >> suspend method is PSCI. > > I would say yes but if you have a real good reason not to adopt PSCI on > your platform then you can try present that. It should be convincing > enough to deviate from the standards :) Since we don't implement full features of PSCI on our platform, that is why we wants to know whether there is registration of platform suspend method. BTW, from the git log, it seems psci.c doesn't register system suspend until Linux 4.4. if so, before 4.4, how aarch64 support such as str, echo mem > /sys/power/state , suspend flow? appreciate your kind explanation.