Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752823Ab2KSEbS (ORCPT ); Sun, 18 Nov 2012 23:31:18 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:44945 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752716Ab2KSEbR convert rfc822-to-8bit (ORCPT ); Sun, 18 Nov 2012 23:31:17 -0500 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT To: Andrew Lunn , Gregory CLEMENT From: Mike Turquette In-Reply-To: <20121117135435.GA13479@lunn.ch> CC: Andrew Lunn , , , Sebastian Hesselbarth References: <1353014906-31566-6-git-send-email-andrew@lunn.ch> <1353088920-17458-1-git-send-email-gregory.clement@free-electrons.com> <1353088920-17458-2-git-send-email-gregory.clement@free-electrons.com> <20121117082602.GF24569@lunn.ch> <50A75BB4.4070003@free-electrons.com> <20121117135435.GA13479@lunn.ch> Message-ID: <20121119043034.21126.92888@nucleus> User-Agent: alot/0.3.2+ Subject: Re: [PATCH 1/2] clk: mvebu: armada 370/XP add clock gating control provider for DT Date: Sun, 18 Nov 2012 20:30:34 -0800 X-Originating-IP: [10.188.36.112] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1108 Lines: 29 Quoting Andrew Lunn (2012-11-17 05:54:35) > > > What is the ddr clock for? Does bad things happen if you turn it off? > > > Kirkwood has a similar clock, dunit, which i decided not to export, > > > since when you turn it off, the whole SoC locks up. > > > > Well of course if you code run in DDR then it could be a problem. But > > I think it could be useful to turn it off when going to suspend, it > > the DDR can do self-refresh. In this case it should be possible to run > > the code from SRAM or L2 Cache. > > O.K. Just watch out for the lateinit call in the clock framework. > CLK_IGNORE_UNUSED is the flag you want for this situation. Regards, Mike > Andrew > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/