From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966174AbeCAFsi (ORCPT ); Thu, 1 Mar 2018 00:48:38 -0500 Received: from mail-pl0-f67.google.com ([209.85.160.67]:35801 "EHLO mail-pl0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966141AbeCAFs3 (ORCPT ); Thu, 1 Mar 2018 00:48:29 -0500 X-Google-Smtp-Source: AG47ELu3b6WB3PXZJb8Jb3SeK6VGFetXX3N4kEnwdAEiQNoZN2KU/mLQWX8bv8G+GbRnL3FX4pvc1Q== From: Derek Basehore To: linux-kernel@vger.kernel.org Cc: Soby.Mathew@arm.com, sudeep.holla@arm.com, devicetree@vger.kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, tglx@linutronix.de, briannorris@chromium.org, marc.zyngier@arm.com, Derek Basehore Subject: [PATCH v7 2/3] DT/arm,gic-v3-its: add reset-on-suspend property Date: Wed, 28 Feb 2018 21:48:19 -0800 Message-Id: <20180301054820.42847-3-dbasehore@chromium.org> X-Mailer: git-send-email 2.16.2.395.g2e18187dfd-goog In-Reply-To: <20180301054820.42847-1-dbasehore@chromium.org> References: <20180301054820.42847-1-dbasehore@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds documentation for the new reset-on-suspend property. This property enables saving and restoring the ITS for when it loses state in system suspend. Signed-off-by: Derek Basehore --- .../devicetree/bindings/interrupt-controller/arm,gic-v3.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt index 0a57f2f4167d..dfd1b9b838cd 100644 --- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt +++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt @@ -78,6 +78,11 @@ These nodes must have the following properties: Optional: - socionext,synquacer-pre-its: (u32, u32) tuple describing the untranslated address and size of the pre-ITS window. +- reset-on-suspend: Boolean property. Indicates that the ITS loses power + on suspend to memory (via PSCI_SYSTEM_SUSPEND). Registers and data within + the ITS will be the same as before probe (PSCI FW does not restore state). + Any state stored in external memory is maintained (such as collection + tables stored in external memory). The main GIC node must contain the appropriate #address-cells, #size-cells and ranges properties for the reg property of all ITS -- 2.16.2.395.g2e18187dfd-goog