From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: [PATCH 07/17] omap4: pm: CPU1 wakeup workaround form Low power modes Date: Wed, 02 Mar 2011 15:44:27 -0800 Message-ID: <87tyflxf38.fsf@ti.com> References: <1298112158-28469-1-git-send-email-santosh.shilimkar@ti.com> <1298112158-28469-8-git-send-email-santosh.shilimkar@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from na3sys009aog116.obsmtp.com ([74.125.149.240]:53207 "EHLO na3sys009aog116.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754352Ab1CBXob (ORCPT ); Wed, 2 Mar 2011 18:44:31 -0500 Received: by mail-yi0-f45.google.com with SMTP id 19so199645yib.18 for ; Wed, 02 Mar 2011 15:44:29 -0800 (PST) In-Reply-To: <1298112158-28469-8-git-send-email-santosh.shilimkar@ti.com> (Santosh Shilimkar's message of "Sat, 19 Feb 2011 16:12:28 +0530") Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Santosh Shilimkar Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Santosh Shilimkar writes: > The SGI(Software Generated Interrupts) are not wakeup capable from > low power states. This is known limitation on OMAP4 and needs to be > worked around by using software forced clockdomain wake-up. CPU0 forces > the CPU1 clockdomain to software force wakeup. After the wakeup, CPU1 > restores its clockdomain hardware supervised mode. > > More details can be found in OMAP4430 TRM - Version J > Section : > 4.3.4.2 Power States of CPU0 and CPU1 > > Signed-off-by: Santosh Shilimkar > Reviewed-by: Kevin Hilman One other thing... in subject: s/form/from/ Kevin From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@ti.com (Kevin Hilman) Date: Wed, 02 Mar 2011 15:44:27 -0800 Subject: [PATCH 07/17] omap4: pm: CPU1 wakeup workaround form Low power modes In-Reply-To: <1298112158-28469-8-git-send-email-santosh.shilimkar@ti.com> (Santosh Shilimkar's message of "Sat, 19 Feb 2011 16:12:28 +0530") References: <1298112158-28469-1-git-send-email-santosh.shilimkar@ti.com> <1298112158-28469-8-git-send-email-santosh.shilimkar@ti.com> Message-ID: <87tyflxf38.fsf@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Santosh Shilimkar writes: > The SGI(Software Generated Interrupts) are not wakeup capable from > low power states. This is known limitation on OMAP4 and needs to be > worked around by using software forced clockdomain wake-up. CPU0 forces > the CPU1 clockdomain to software force wakeup. After the wakeup, CPU1 > restores its clockdomain hardware supervised mode. > > More details can be found in OMAP4430 TRM - Version J > Section : > 4.3.4.2 Power States of CPU0 and CPU1 > > Signed-off-by: Santosh Shilimkar > Reviewed-by: Kevin Hilman One other thing... in subject: s/form/from/ Kevin