Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965463AbeALVZg (ORCPT + 1 other); Fri, 12 Jan 2018 16:25:36 -0500 Received: from mail-pf0-f194.google.com ([209.85.192.194]:41443 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965363AbeALVYp (ORCPT ); Fri, 12 Jan 2018 16:24:45 -0500 X-Google-Smtp-Source: ACJfBouL7RgKRXaiVpleDbll3O7IFjaBDK/FXHAFicV5bbUM6iBAT3LILuz5j8WSdpOl4O9JxKAVGQ== From: Derek Basehore To: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, tglx@linutronix.de, briannorris@chromium.org, marc.zyngier@arm.com, Derek Basehore Subject: [PATCH 5/8] DT/arm,gic-v3: add save-suspend-state property Date: Fri, 12 Jan 2018 13:24:19 -0800 Message-Id: <20180112212422.148625-6-dbasehore@chromium.org> X-Mailer: git-send-email 2.16.0.rc1.238.g530d649a79-goog In-Reply-To: <20180112212422.148625-1-dbasehore@chromium.org> References: <20180112212422.148625-1-dbasehore@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: This adds documentation for the new save-suspend-state property. This property enables saving and restoring the GIC for when it loses state in system suspend. Change-Id: I9ad34baed04475c6ef1562bc0f72ad5d348f9904 Signed-off-by: Derek Basehore --- .../bindings/interrupt-controller/arm,gic-v3.txt | 36 ++++++++++++++++++++++ 1 file changed, 36 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..820556a8ffd2 100644 --- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt +++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt @@ -57,6 +57,10 @@ Optional occupied by the redistributors. Required if more than one such region is present. +- save-suspend-state : Bool property. Setting this has the kernel save + and restore the GIC state for suspend and resume respectively. For + when the GIC loses power during suspend. + Sub-nodes: PPI affinity can be expressed as a single "ppi-partitions" node, @@ -107,6 +111,38 @@ Examples: }; }; + gic: interrupt-controller@fee00000 { + compatible = "arm,gic-v3"; + #interrupt-cells = <4>; + #address-cells = <2>; + #size-cells = <2>; + ranges; + interrupt-controller; + save-suspend-state; + + reg = <0x0 0xfee00000 0 0x10000>, /* GICD */ + <0x0 0xfef00000 0 0xc0000>, /* GICR */ + <0x0 0xfff00000 0 0x10000>, /* GICC */ + <0x0 0xfff10000 0 0x10000>, /* GICH */ + <0x0 0xfff20000 0 0x10000>; /* GICV */ + interrupts = ; + its: interrupt-controller@fee20000 { + compatible = "arm,gic-v3-its"; + msi-controller; + reg = <0x0 0xfee20000 0x0 0x20000>; + }; + + ppi-partitions { + ppi_cluster0: interrupt-partition-0 { + affinity = <&cpu_l0 &cpu_l1 &cpu_l2 &cpu_l3>; + }; + + ppi_cluster1: interrupt-partition-1 { + affinity = <&cpu_b0 &cpu_b1>; + }; + }; + }; + gic: interrupt-controller@2c010000 { compatible = "arm,gic-v3"; #interrupt-cells = <4>; -- 2.16.0.rc1.238.g530d649a79-goog