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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B15A5C41514 for ; Tue, 20 Aug 2019 07:29:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 837E022DA8 for ; Tue, 20 Aug 2019 07:29:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b="VSH8jpMc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729420AbfHTH3A (ORCPT ); Tue, 20 Aug 2019 03:29:00 -0400 Received: from mail-eopbgr50040.outbound.protection.outlook.com ([40.107.5.40]:43843 "EHLO EUR03-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729370AbfHTH27 (ORCPT ); Tue, 20 Aug 2019 03:28:59 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ePAi7OyXEUY6Hp/jzEVIdPFEFTruFyViFBRvp8DdkA/wA3PpJigFK13l8CU8Ep6mYVpjG9g0tGyOr+HVWpIWgWyxpPn4jhxLopoHk5zFCy5KvzPxNAuDFBLFQd8YRiU9bPyKt8u0ZzVuwr+enr3etzFI3vmMaBnwkeowLxB+WHrOXGhtgkKB7Y9bm+5tPg20zyvNVdDmA/DBCMz4g/M2ivOgLzdoWnh2uwcyTlaxQenFJEGgBy/ZOJ3U5NubpUk2P8ER9hoPJGK24BVIfPdiTwDuMGak6E1ODZa8gvWDUYKpuIbnLylzCcgRbmoX5k0y4AYi3TbFOqyuFbA3eeKTTw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pMTQ1bL7iTonEYzHTx0G5mW/k6ZqwOW6nis5+Qpxzuw=; b=aYDWmE8S0m+Dy0fsN6+K12YcLOoyz0Bjn4NCtk7RwIe69rhXW6kF1lVSgoKTdB/OAuaFEcvCl+m474KwKQjFvrAQYQL3QY3M5lnUWXuNhH6dPpCpiOdT2tX2a2PJTychICM4L4Pv6LUtLdGhnmX3xFiVESYTJCZJoSUR0TMNLe5/SKxv/Xc4IAnVSBzsUwmGA4IKGoSP90Sr5TcxB5ClCegYQpe7A/L2qk5RyF/xmhjVGA5YS0Z18Y5k2vrVCPNbU4SP36Xw7vH2D9CnTlF1X/dQsARl/JA9+CGEW+0690oLbFfaBrUJPUt5SYB3ypwyQrZjjInK0wJgKqdAprlpkA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pMTQ1bL7iTonEYzHTx0G5mW/k6ZqwOW6nis5+Qpxzuw=; b=VSH8jpMcwh7Mwj8foibvQSpytVui/SaABabUqfkV3pV5RufTD+kHnMHOjQM+otkPKOjdU1lZF43BSemmpKRp/Lojj/mf8xAgNVjAgFsIcU+0S6t3VwkZygLEzjWlcfR7wPtV7fFAJ3t6PtL304BNGXjWryZ7/BJSh8bzXHnLCu4= Received: from DB8PR04MB6747.eurprd04.prod.outlook.com (20.179.250.159) by DB8PR04MB5627.eurprd04.prod.outlook.com (20.179.9.77) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2178.18; Tue, 20 Aug 2019 07:28:55 +0000 Received: from DB8PR04MB6747.eurprd04.prod.outlook.com ([fe80::19ec:cddf:5e07:37eb]) by DB8PR04MB6747.eurprd04.prod.outlook.com ([fe80::19ec:cddf:5e07:37eb%3]) with mapi id 15.20.2178.018; Tue, 20 Aug 2019 07:28:55 +0000 From: "Z.q. Hou" To: "linux-pci@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "gustavo.pimentel@synopsys.com" , "jingoohan1@gmail.com" , "bhelgaas@google.com" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , Leo Li , "lorenzo.pieralisi@arm.com" , "andrew.murray@arm.com" CC: "M.h. Lian" , "Z.q. Hou" Subject: [PATCHv2 3/4] ARM: dts: ls1021a: Remove num-lanes property from PCIe nodes Thread-Topic: [PATCHv2 3/4] ARM: dts: ls1021a: Remove num-lanes property from PCIe nodes Thread-Index: AQHVVyjsUiZYcs6/dkaNMcnf6FMNwg== Date: Tue, 20 Aug 2019 07:28:55 +0000 Message-ID: <20190820073022.24217-4-Zhiqiang.Hou@nxp.com> References: <20190820073022.24217-1-Zhiqiang.Hou@nxp.com> In-Reply-To: <20190820073022.24217-1-Zhiqiang.Hou@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HK0P153CA0030.APCP153.PROD.OUTLOOK.COM (2603:1096:203:17::18) To DB8PR04MB6747.eurprd04.prod.outlook.com (2603:10a6:10:10b::31) authentication-results: spf=none (sender IP is ) smtp.mailfrom=zhiqiang.hou@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [119.31.174.73] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: da113cee-ba47-4834-48ca-08d725400ed3 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(5600148)(711020)(4605104)(1401327)(4618075)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020);SRVR:DB8PR04MB5627; x-ms-traffictypediagnostic: DB8PR04MB5627: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7691; x-forefront-prvs: 013568035E x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(4636009)(376002)(346002)(396003)(366004)(39860400002)(136003)(199004)(189003)(54534003)(2616005)(4326008)(6512007)(1076003)(66446008)(66476007)(476003)(76176011)(99286004)(66066001)(6436002)(478600001)(71200400001)(81156014)(66946007)(71190400001)(52116002)(66556008)(54906003)(110136005)(81166006)(7736002)(14454004)(305945005)(8676002)(316002)(8936002)(7416002)(25786009)(3846002)(6486002)(486006)(256004)(64756008)(53936002)(86362001)(386003)(186003)(6506007)(6116002)(2906002)(5660300002)(446003)(2501003)(102836004)(26005)(2201001)(36756003)(11346002)(50226002)(921003)(1121003);DIR:OUT;SFP:1101;SCL:1;SRVR:DB8PR04MB5627;H:DB8PR04MB6747.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: MXSwWuxYL9Vp0YR+XP0k6Uur/AyAUnHpriLlZEKQ4B3vlljhu75v0kCoUN61w7OslyuF6PM000OVxhd+Q0C1nE91bBUfKZdw+9TlVaASL7oCk4P7+R2I9u/9dZaxbNZ5wwAbN5StKD6BgR+CSrZe93Ewchx7ykD3CQcbM9il+xMUz0J6fnm8EYoyTemP/aVJsuNXwfSlbsloHfaWSqfssOvOP+51Qe6JE0MTRJ/h+IHyucC6clkBiXkxnTrbO/okimMCIsOsgyUGMmQhNhPwG3r4rh51AgyOdVoNIVhfqPR/j6k9wVRpr8+OqxZelxIynt1NlHz5Ob345aSYB3jw14Rkv7QuNSDvlsqdeX7i7WCDNs05LhqX85QTfK+ERc2Gr0AY/5/jGZWSPq6UenRmLmsUfdNJf73lZOsawFhPzH0= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: da113cee-ba47-4834-48ca-08d725400ed3 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Aug 2019 07:28:55.6235 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: M1e0TSz5RyGHYB+KkOJi2ATbrp1L+b37eSao7pGRaDQ49zHpY5Ltuj93o16jezt4bA0XpOPHTkD6cwhh0yguXw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR04MB5627 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hou Zhiqiang Remove the num-lanes to avoid the driver setting the link width. On FSL Layerscape SoCs, the number of lanes assigned to PCIe controller is not fixed, it is determined by the selected SerDes protocol in the RCW (Reset Configuration Word), and the PCIe link training is completed automatically base on the selected SerDes protocol, and the link width set-up is updated by hardware after power on reset. So the num-lanes is not needed for Layerscape PCIe. The current num-lanes was added erroneously, which actually indicates the max lanes PCIe controller can support up to, instead of the lanes assigned to the PCIe controller. And the link width set by SerDes protocol will be overridden by the num-lanes, hence the subsequent re-taining will fail when the assigned lanes does not equal to num-lanes. Signed-off-by: Hou Zhiqiang Reviewed-by: Andrew Murray --- V2: - Reworded the change log. arch/arm/boot/dts/ls1021a.dtsi | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dts= i index 464df4290ffc..2f6977ada447 100644 --- a/arch/arm/boot/dts/ls1021a.dtsi +++ b/arch/arm/boot/dts/ls1021a.dtsi @@ -874,7 +874,6 @@ #address-cells =3D <3>; #size-cells =3D <2>; device_type =3D "pci"; - num-lanes =3D <4>; num-viewport =3D <6>; bus-range =3D <0x0 0xff>; ranges =3D <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000 = /* downstream I/O */ @@ -899,7 +898,6 @@ #address-cells =3D <3>; #size-cells =3D <2>; device_type =3D "pci"; - num-lanes =3D <4>; num-viewport =3D <6>; bus-range =3D <0x0 0xff>; ranges =3D <0x81000000 0x0 0x00000000 0x48 0x00010000 0x0 0x00010000 = /* downstream I/O */ --=20 2.17.1