From mboxrd@z Thu Jan 1 00:00:00 1970 From: swarren@wwwdotorg.org (Stephen Warren) Date: Tue, 13 Nov 2012 12:13:07 -0700 Subject: [PATCH V2] ARM: tegra: retain L2 content over CPU suspend/resume In-Reply-To: <1352772288-2290-1-git-send-email-josephl@nvidia.com> References: <1352772288-2290-1-git-send-email-josephl@nvidia.com> Message-ID: <50A29BC3.1020808@wwwdotorg.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 11/12/2012 07:04 PM, Joseph Lo wrote: > The L2 RAM is in different power domain from the CPU cluster. So the > L2 content can be retained over CPU suspend/resume. To do that, we > need to disable L2 after the MMU is disabled, and enable L2 before > the MMU is enabled. But the L2 controller is in the same power domain > with the CPU cluster. We need to restore it's settings and re-enable > it after the power be resumed. Thanks, applied to Tegra's for-3.8/cpuidle branch.