From nobody Mon Apr 13 15:49:06 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8416C43217 for ; Mon, 14 Nov 2022 19:49:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237217AbiKNTtr (ORCPT ); Mon, 14 Nov 2022 14:49:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237427AbiKNTt2 (ORCPT ); Mon, 14 Nov 2022 14:49:28 -0500 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39CE52649D; Mon, 14 Nov 2022 11:48:53 -0800 (PST) Received: from Falcon9.mtl.collabora.ca (mtl.collabora.ca [66.171.169.34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: detlev) by madras.collabora.co.uk (Postfix) with ESMTPSA id 57386660296B; Mon, 14 Nov 2022 19:48:51 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1668455332; bh=MLIKw1v4Jq1PCDVbOsMzfRiH8Kzx3kjxryEHcmtLcEw=; h=From:To:Cc:Subject:Date:From; b=c5GsRd8KXYuQQNtE2igjr0XnkGwB18MKCBgXckogVDELeZVgtWZxjxfLGUQyFhWNg nt1RJu+QEqZyyIR4Z08K3pLtoIECvEF0aBM1JNExwpqXjWftublznK2bRvpJOnyHEl kDan6Dvn+OXlEzTyCD9sR2E+oETAprRmYdTZBbQIZLk89ihE+oiEqWQLs7b+wI3XjH r2haG2iWpDJQkxB2cBs9RbN7nesmV0+b2JYl4av4JGr+F44xOg1dyfv/q4s5yb0KUA lTsI09n4xASEssP2uvdA2i+SK++GzxZ5UldmFmr5TAZLi6oBIb08/Uboaz0u2MwiCR 8F871c4IsJoGA== From: Detlev Casanova To: linux-kernel@vger.kernel.org Cc: Geert Uytterhoeven , Magnus Damm , Rob Herring , Krzysztof Kozlowski , linux-renesas-soc@vger.kernel.org (open list:ARM/RENESAS ARCHITECTURE), devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), Detlev Casanova Subject: [PATCH] arm64: dts: renesas: r8a77951: Add reserved memory region Date: Mon, 14 Nov 2022 14:48:46 -0500 Message-Id: <20221114194846.108814-1-detlev.casanova@collabora.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The 0x3000000 bytes memory region starting at 0x54000000 is reserved for the lossy_decompression hardware that will try to decompress any data written in the region. Mark the region as no-map to prevent linux from using it as RAM. Signed-off-by: Detlev Casanova --- arch/arm64/boot/dts/renesas/r8a77951.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/boot/dts/renesas/r8a77951.dtsi b/arch/arm64/boot/dt= s/renesas/r8a77951.dtsi index 07c8763c1e77..171833d91313 100644 --- a/arch/arm64/boot/dts/renesas/r8a77951.dtsi +++ b/arch/arm64/boot/dts/renesas/r8a77951.dtsi @@ -290,6 +290,18 @@ CPU_SLEEP_1: cpu-sleep-1 { }; }; =20 + reserved-memory { + #address-cells =3D <2>; + #size-cells =3D <2>; + ranges; + + /* device specific region for Lossy Decompression */ + lossy_decompress: memory-region@54000000 { + no-map; + reg =3D <0x00000000 0x54000000 0x0 0x03000000>; + }; + }; + extal_clk: extal { compatible =3D "fixed-clock"; #clock-cells =3D <0>; --=20 2.38.1