From patchwork Mon Oct 28 14:22:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 13853636 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4B01FD33990 for ; Mon, 28 Oct 2024 14:57:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=8DduQ5a5iEKGftFFpS2C6ZNV4q2UCgGo/WE7bIsCA74=; b=Fk1Tn+/ROwq0DqpSQnr2qnfA2m /nf+LRye76IKPFI+X1PACbKhGOFCCVKuTNG/lx6kstPjbAoEQGwyEqGIhzC5zYR0mLWRJUzbGMoeG UAXm1+AoPQ/5cvfPGrjGHs1Er62Rgo919FFT7wuH3xgc+sHRbW5xrwjv0iHvYtFG4DEl8LwRE6zjD UFPD9rt1Y3YxfHirLNVq4trOFz0p1+qIk3pSUloS9OoShljmsMdA5I6YNH9mktRxJ1emlb55WSkCP BJp+lRoVSw8kQhsJs7WitZrcTZgP207WqRpzEXlXoRfpsOVguYjFRj7S6d7IOKGlE36UJFaO5NHz7 9seYAvyQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t5RBE-0000000BDHG-3N9f; Mon, 28 Oct 2024 14:57:16 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t5QeF-0000000B6Vu-0UQ4 for linux-arm-kernel@lists.infradead.org; Mon, 28 Oct 2024 14:23:12 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 80644A425CA; Mon, 28 Oct 2024 14:21:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4680C4CECD; Mon, 28 Oct 2024 14:23:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730125388; bh=70JpgkYvN9YM24Jz+FtvScOfqAM/jZI33kSB5+f8jrI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=uWoduNTdbhD9TXD1VwGSVhid/JfbNZDhhSTtQ+Zs3ioRGg6tvVfDDsO7n6Ybo/UJl NsxIokqQOYhAL4WSF2svmo6fDJ32xwI3BhJ4nntHQH/9m04sMJzuX8t4AytmOrUT6S IxWlHolrSrED7yOnX/7n39zdEROIZr2p1dIlWx7wY+W7sUA86CfxB2bGLD+pOaaf6A banm0ijjslbav+xsnj1utuXglFa/F/XmiZcKG1MexyAYqAZyvIQH0RfdF7NOp1l8JX pN++CrTWodTvybBb9bEtYQ6Taw6kleIsLkJw3qOrLTxSI2wILjGwQQQgLV2ktbpqE8 GOTAT3N1G8tKw== From: Konrad Dybcio Date: Mon, 28 Oct 2024 15:22:57 +0100 Subject: [PATCH 1/3] dt-bindings: arm,psci: Allow S2RAM power_state parameter description MIME-Version: 1.0 Message-Id: <20241028-topic-cpu_suspend_s2ram-v1-1-9fdd9a04b75c@oss.qualcomm.com> References: <20241028-topic-cpu_suspend_s2ram-v1-0-9fdd9a04b75c@oss.qualcomm.com> In-Reply-To: <20241028-topic-cpu_suspend_s2ram-v1-0-9fdd9a04b75c@oss.qualcomm.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , Mark Rutland Cc: Marijn Suijten , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Bjorn Andersson , Konrad Dybcio X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1730125380; l=1434; i=konrad.dybcio@oss.qualcomm.com; s=20230215; h=from:subject:message-id; bh=qowdcUV0IcXfH3TE+fGW1N5ucMJrGFxOqfTc+GjqJNE=; b=PkrsrLQrYHBH3Z0pNaW3PK242z+Gnl0VhBs6CQJrIOlHjhysAG9+Zc9b2RC7ghkCCjFg5lCTT bin1KT4oKNJA+UZHJeDOPleGn5YYe0DX/fXojY3JnSxnRIA+8yqJTag X-Developer-Key: i=konrad.dybcio@oss.qualcomm.com; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241028_072311_363117_6D0BBF9D X-CRM114-Status: UNSURE ( 9.44 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Konrad Dybcio Certain firmware implementations (such as the ones found on Qualcomm SoCs between roughly 2015 and 2023) expose an S3-like S2RAM state through the CPU_SUSPEND call, as opposed to exposing PSCIv1.0's optional PSCI_SYSTEM_SUSPEND. This really doesn't work well with the model where we associate all calls to CPU_SUSPEND with cpuidle. Allow specifying a single special CPU_SUSPEND suspend parameter value that is to be treated just like SYSTEM_SUSPEND from the OS's point of view. Signed-off-by: Konrad Dybcio --- Documentation/devicetree/bindings/arm/psci.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/psci.yaml b/Documentation/devicetree/bindings/arm/psci.yaml index cbb012e217ab80c1ca88e611e7acc06c6d56fad0..a6901878697c8e1ec1cbfed62298ae3bc58f2501 100644 --- a/Documentation/devicetree/bindings/arm/psci.yaml +++ b/Documentation/devicetree/bindings/arm/psci.yaml @@ -98,6 +98,12 @@ properties: [1] Kernel documentation - ARM idle states bindings Documentation/devicetree/bindings/cpu/idle-states.yaml + arm,psci-s2ram-param: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + power_state parameter denoting the S2RAM/S3-like system suspend state + maxItems: 1 + patternProperties: "^power-domain-": $ref: /schemas/power/power-domain.yaml#