From mboxrd@z Thu Jan 1 00:00:00 1970 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 15ABBC3ABBE for ; Thu, 8 May 2025 10:41:51 +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:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ULufjYrRgkBA816dXtdEiDgVGfjh9gA6c4+JfoefvJU=; b=ao+OJ/RJ6UTN03uV7IfboLCcIy 34kdtDDzymHIk/RinZiMgMVgbVsAVVHYcUrvxDnN7eLQpKsnzCaOmkUazDsKiaVWYTCIbhAWj6hPq qE87goYoANRYrhfgSaBWjT8FuM5DEjFsmanPJkPQ+nVqawAjOxjxW6xopPN2T+NWFLdZ8ifvtyCNw hDJXGNxKhF/KXoXCf8dW/0UQGthkkY+oB05IQDdvzVtdSVWXpZWyhUtCmhSc/xsb/Dxfg+b0wahnp dYIqqBDcGjW9VIh29/CjnjSgN/tqWQmC3/FfqDucdhJyBpJmWqkW3XEV7SPPYUj6zbMIu7neUgCWW N0z4rwDQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uCyhB-00000000Q0B-0Gjz; Thu, 08 May 2025 10:41:41 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uCyYP-00000000O3t-3pt0 for linux-arm-kernel@lists.infradead.org; Thu, 08 May 2025 10:32:38 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 38411106F; Thu, 8 May 2025 03:32:27 -0700 (PDT) Received: from usa.arm.com (e133711.arm.com [10.1.196.55]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 717DC3F5A1; Thu, 8 May 2025 03:32:36 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Cc: Sudeep Holla , Lorenzo Pieralisi , Liviu Dudau , Leo Yan Subject: [PATCH 2/3] arm64: dts: fvp: Add system timer for broadcast during CPU idle Date: Thu, 8 May 2025 11:32:24 +0100 Message-Id: <20250508103225.354925-2-sudeep.holla@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250508103225.354925-1-sudeep.holla@arm.com> References: <20250508103225.354925-1-sudeep.holla@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250508_033237_996897_6237BCE2 X-CRM114-Status: UNSURE ( 8.16 ) 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 Introduce a system-level timer node in the FVP device tree to act as a broadcast timer when CPUs are in context losing idle states where the local timer stops on entering such low power states. This change complements recent CPU idle state additions. Signed-off-by: Sudeep Holla --- arch/arm64/boot/dts/arm/fvp-base-revc.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/arm/fvp-base-revc.dts b/arch/arm64/boot/dts/arm/fvp-base-revc.dts index ff4e6f4d8797..c1e22ffca623 100644 --- a/arch/arm64/boot/dts/arm/fvp-base-revc.dts +++ b/arch/arm64/boot/dts/arm/fvp-base-revc.dts @@ -249,6 +249,20 @@ timer { ; }; + timer@2a810000 { + compatible = "arm,armv7-timer-mem"; + reg = <0x0 0x2a810000 0x0 0x10000>; + clock-frequency = <100000000>; + #address-cells = <2>; + #size-cells = <2>; + ranges; + frame@2a830000 { + frame-number = <1>; + interrupts = <0 26 4>; + reg = <0x0 0x2a830000 0x0 0x10000>; + }; + }; + pmu { compatible = "arm,armv8-pmuv3"; interrupts = ; -- 2.34.1