From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leonard Crestez Subject: [PATCH v3 2/4] dt-bindings: imx-cpufreq-dt: Document opp-supported-hw usage Date: Tue, 7 May 2019 13:52:23 +0000 Message-ID: <79a798d7d93cc89549e5fe290c8139011b72ee01.1557236799.git.leonard.crestez@nxp.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Viresh Kumar , Lucas Stach , Rob Herring Cc: Aisheng Dong , Mark Rutland , Jacky Bai , Anson Huang , "devicetree@vger.kernel.org" , "linux-pm@vger.kernel.org" , "Rafael J. Wysocki" , dl-linux-imx , "kernel@pengutronix.de" , Fabio Estevam , "linux-arm-kernel@lists.infradead.org" , Abel Vesa List-Id: 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>; + }; +} -- 2.17.1 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=-9.1 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=ham 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 45724C46470 for ; Tue, 7 May 2019 13:52:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0F66120873 for ; Tue, 7 May 2019 13:52:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b="PETNffK5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726711AbfEGNwd (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; 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Wysocki" , dl-linux-imx , "kernel@pengutronix.de" , Fabio Estevam , "linux-arm-kernel@lists.infradead.org" , Abel Vesa Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.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>; + }; +} -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel