From patchwork Tue May 7 13:52:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leonard Crestez X-Patchwork-Id: 1096365 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=nxp.com header.i=@nxp.com header.b="PETNffK5"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44z1JL0WZJz9sB8 for ; Tue, 7 May 2019 23:52:34 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726677AbfEGNwd (ORCPT ); Tue, 7 May 2019 09:52:33 -0400 Received: from mail-eopbgr140087.outbound.protection.outlook.com ([40.107.14.87]:51872 "EHLO EUR01-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726740AbfEGNwd (ORCPT ); Tue, 7 May 2019 09:52:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jGbl+gAFgO1V5cR2PKg351rAjFabMk5PNLef7wxZEJU=; b=PETNffK5umX1VT0ElvTv7Viu1CF0uBIa1ANmaKYME2BG16BEcCJJy8XbyJT8LQe/DBLSiTtByxA2CK7sbVKvRnoMryZFKVyfWw96WQo/7Kbs8qCyIpBEzsgQLd1CPnJ13g1LFfexz0kCMGVN7U4u4E4qRuuvRu9KtqxEFEoiegU= Received: from AM0PR04MB6434.eurprd04.prod.outlook.com (20.179.252.215) by AM0PR04MB6548.eurprd04.prod.outlook.com (20.179.254.141) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1856.11; Tue, 7 May 2019 13:52:23 +0000 Received: from AM0PR04MB6434.eurprd04.prod.outlook.com ([fe80::19be:75a:9fe:7cec]) by AM0PR04MB6434.eurprd04.prod.outlook.com ([fe80::19be:75a:9fe:7cec%7]) with mapi id 15.20.1856.012; Tue, 7 May 2019 13:52:23 +0000 From: Leonard Crestez To: Viresh Kumar , Lucas Stach , Rob Herring CC: Anson Huang , Jacky Bai , "Rafael J. Wysocki" , Abel Vesa , Aisheng Dong , Fabio Estevam , Mark Rutland , "devicetree@vger.kernel.org" , "linux-pm@vger.kernel.org" , "kernel@pengutronix.de" , dl-linux-imx , "linux-arm-kernel@lists.infradead.org" Subject: [PATCH v3 2/4] dt-bindings: imx-cpufreq-dt: Document opp-supported-hw usage Thread-Topic: [PATCH v3 2/4] dt-bindings: imx-cpufreq-dt: Document opp-supported-hw usage Thread-Index: AQHVBNwY/kQ/3ak9eEqbSCeWjXpTtg== Date: Tue, 7 May 2019 13:52:23 +0000 Message-ID: <79a798d7d93cc89549e5fe290c8139011b72ee01.1557236799.git.leonard.crestez@nxp.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [89.37.124.34] x-mailer: git-send-email 2.17.1 x-clientproxiedby: VI1PR0202CA0006.eurprd02.prod.outlook.com (2603:10a6:803:14::19) To AM0PR04MB6434.eurprd04.prod.outlook.com (2603:10a6:208:16c::23) authentication-results: spf=none (sender IP is ) smtp.mailfrom=leonard.crestez@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e3a41e83-fb92-4a74-41e6-08d6d2f33b59 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4618075)(2017052603328)(7193020); SRVR:AM0PR04MB6548; x-ms-traffictypediagnostic: AM0PR04MB6548: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3631; x-forefront-prvs: 0030839EEE x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(366004)(136003)(396003)(346002)(376002)(39860400002)(189003)(199004)(8676002)(81156014)(81166006)(486006)(11346002)(86362001)(68736007)(6512007)(110136005)(53936002)(54906003)(71190400001)(4326008)(118296001)(102836004)(66066001)(76176011)(8936002)(36756003)(52116002)(6506007)(50226002)(386003)(446003)(256004)(14454004)(476003)(478600001)(25786009)(6116002)(5660300002)(2616005)(3846002)(44832011)(305945005)(66946007)(6486002)(73956011)(66476007)(71200400001)(2906002)(99286004)(6436002)(26005)(186003)(316002)(64756008)(66556008)(66446008)(7736002); DIR:OUT; SFP:1101; SCL:1; SRVR:AM0PR04MB6548; H:AM0PR04MB6434.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A: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: /41C6Bg9jHzc72qWMI0lWXXPht+LS4o0Iw/ozo04nvvhgrV2Of2llvDGIKkdA1RoaC/3wHDUDy6ZHB8gNTPZFChlRZfo8hpXaKzHehR/mAWMz9ziiBO+6afnZzS4lCqKz44XSMoJ0ab8gOywDFjRCM/BKTFbevzxHEGUVaOgewIWXsIfqSiIeR+dV2x0Z2f9Tnp/nb5e1FPfgvrWx+eYdQVl/+qlpfqb9SK7bt2pQTAd9ceGgBT4FBGFNfz9jk2y5jPLEWYljIVKUx3jyuw34c/c0YcdgKaaxGIKp3IjUG/MVR0N584e/IkXQRx/EKMfEhXq0Do/XrILgAHKHuNmqP6FbFtHXQV4WA92uDyGBAxl2Gn68u23OnG3rG/RyE4IpcRyzmrFziMZPYHzFBBlrTI0udIIow3g+0lp4Mo1QPo= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: e3a41e83-fb92-4a74-41e6-08d6d2f33b59 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 May 2019 13:52:23.6243 (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-Transport-CrossTenantHeadersStamped: AM0PR04MB6548 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The interpretation of opp-supported-hw bits for imx-cpufreq-dt driver is not very obvious so attempt to explain it. There is no OF compat string associated. Signed-off-by: Leonard Crestez --- .../bindings/cpufreq/imx-cpufreq-dt.txt | 37 +++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt diff --git a/Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt b/Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt new file mode 100644 index 000000000000..87bff5add3f9 --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/imx-cpufreq-dt.txt @@ -0,0 +1,37 @@ +i.MX CPUFreq-DT OPP bindings +================================ + +Certain i.MX SoCs support different OPPs depending on the "market segment" and +"speed grading" value which are written in fuses. These bits are combined with +the opp-supported-hw values for each OPP to check if the OPP is allowed. + +Required properties: +-------------------- + +For each opp entry in 'operating-points-v2' table: +- opp-supported-hw: Two bitmaps indicating: + - Supported speed grade mask + - Supported market segment mask + 0: Consumer + 1: Extended Consumer + 2: Industrial + 3: Automotive + +Example: +-------- + +opp_table { + compatible = "operating-points-v2"; + opp-1000000000 { + opp-hz = /bits/ 64 <1000000000>; + /* grade >= 0, consumer only */ + opp-supported-hw = <0xf>, <0x3>; + }; + + opp-1300000000 { + opp-hz = /bits/ 64 <1300000000>; + opp-microvolt = <1000000>; + /* grade >= 1, all segments */ + opp-supported-hw = <0xe>, <0x7>; + }; +}