From patchwork Mon Jun 5 13:34:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Looijmans X-Patchwork-Id: 103273 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp2709189vqr; Mon, 5 Jun 2023 07:05:18 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ6L+GfyO3UI15pt7vePhHPzknqvzPanM6Mm2L94k/6TOJM7hClgOIBl1qUXd01v10YAZ6rK X-Received: by 2002:a17:90b:3117:b0:258:d918:67a7 with SMTP id gc23-20020a17090b311700b00258d91867a7mr2890457pjb.19.1685973918522; Mon, 05 Jun 2023 07:05:18 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1685973918; cv=pass; d=google.com; s=arc-20160816; b=NeztmkfkI4abWOJC6DGUgIuhtL0YNlnwxHkItkcOdSmSn7k/XxNqthioqhUm463iPK VS5pqvlDDB79aUtzt2nAloY/CyN4FO5ezYNiJLQ69Gr4L8fmOd0t46IQX59Dcg0gUwWa QFL/gphv/gY3nNTXRZCD/QLO20lR9zVUNZ2In7by/JMxKmWP1xsdS1RlEXVqfxKNSUKx YdUAOYG3hj7mWI2ZZfO78Fdqq9wo4Ww9VUgwrES2x6BXtfclvtyiYIPXuQmfSE6HqCsi SreUW4ZTmHDK7Ggq+Jh9bmeV0laUldI10ki8/02DrMLFfnYTSgYePgNIMTIhR/oQwKPK 9SKw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:references :mime-version:message-id:date:subject:cc:to:from :authentication-results-original:dkim-signature; bh=6FXCiI9knXGnsIlFlLM5Ggg76YHkGn4j1c5wbxIR2iw=; b=zw+/6bABzik4XpGaJ9WouXCkRPWVJekKBXXZAPdTqTMMKg14KOKWs52QluI17/Qdoc ooyR+WpIftoDaYrBkjTaVcrq6QAwO2om1RXxwNmRyOWlhE0nR5x2u0/0229ymaUNdWyO qIank1ybSG57tGz8kwjK+nnJ37Sut442qbkdpPyt+rna0HRQxOzydyJ5AIVSB1j98pz0 Z4m7mAaOGCYv8gLk60XdS1uZs0rsA9GQHgWE9EQB36W/suwkWsXfVT8+/SbABJ1cJHho Qmh9mNbWL48m67SY5U7y0K4NSY8rdOWOj0512Letn50Vv832hURhWFilql1bH7A0ekXP DH9Q== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@topic.nl header.s=selector2 header.b="ZSgbCt/9"; arc=pass (i=1 spf=pass spfdomain=topicproducts.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id w9-20020a17090aea0900b002465d98f18csi7123251pjy.170.2023.06.05.07.05.03; Mon, 05 Jun 2023 07:05:18 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@topic.nl header.s=selector2 header.b="ZSgbCt/9"; arc=pass (i=1 spf=pass spfdomain=topicproducts.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234298AbjFENe4 (ORCPT + 99 others); Mon, 5 Jun 2023 09:34:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234103AbjFENea (ORCPT ); Mon, 5 Jun 2023 09:34:30 -0400 Received: from EUR01-VE1-obe.outbound.protection.outlook.com (mail-ve1eur01on2072.outbound.protection.outlook.com [40.107.14.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD13392; Mon, 5 Jun 2023 06:34:26 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CKX0FDV3dL9oe/TkysoCRQWxe1ezoseBcNyxC67batSqSP2fK2ZnMc6XOz/24oCdeeWGtHUcNw/pbMjf9AIIJ4mbV8iM5yMdpMrbXEtsWhk78Wg3f51TK1KQzhBT9Q5vHMltxCn0GG75b3urnobzHdy7enFRJ+psk2P4UlPB88o3kBqNTYROyvcuZgowkTPjwgVPthL2NeOo/1hCazclRYzP7dcqNWK3h0frcQ/a1mhqosDTYKREoXLvHoOiK9G2PrSw0n2Mef51WH0aMuqYlOllp4sg+Wvt+zwTj9PmCxnw8ZSzGAiNH0yIxMYzsJKCMWBGRFv58sI5pP7M5t68OQ== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=6FXCiI9knXGnsIlFlLM5Ggg76YHkGn4j1c5wbxIR2iw=; b=dR7ajaJhtbgSL12k/l3ufj6qrbiDYeEYxaRzQh5TV5dG55syvUAL5+m7xxPrNwJc7l+JZEo2WZncRSUbE07k7bgNSGFxe7la6FhcMVqx9b4E1u4Y5qQLnRNyxYP/al/qIJ6zW5Lza7pUFnPBusDLF5trWMcuTTG/ndhgv024IRLgBhJs+DnBtA7yMFd/8KV77QvWzhUwYG8+TZA6PS16rIUHP2jj0Oc04jQawaTDrKag9pWcevY4T2s44vwdZzHDnlDiPSI2IpqSFOA5CiDP8qp2/+8EXVSF7uJ10MR4XVVWVKeKCpPJqVTf3Jj6bneHUBaZQb5peONLQky0ySJDlg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 13.93.42.39) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=topicproducts.com; dmarc=none action=none header.from=topic.nl; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=topic.nl; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=6FXCiI9knXGnsIlFlLM5Ggg76YHkGn4j1c5wbxIR2iw=; b=ZSgbCt/97ufDfu9IClwTVCD+7J692bDS8fc+R8P+xfC4SGm8bGfcyyplPpyCuzHOfz9ErEsSgiEm172k8dB5aJOdVh8eV3ZL6dOXAPGuDPERKwrCNF2yHai7s1irv9BacBiqGTgzPuvJtVX4pV8zpkH3phBG6L9nnJWQKWDnndbf/Cl9zkvHyCd5WzCjwJs+4xdjguexDOp6pb1R5eoy716r0UEjU4RchRn5nZJ0KiXag0x07LkrTDGoiv5xJDEf2FmF+0HSlc9J3M0qIUPZD5biNU9thXYGDGMqJkOKNn1vGKXWiUy1MPk2mOZXPXvx5scQ9Weln96wq4DDZjjn6A== Received: from DB6PR0202CA0046.eurprd02.prod.outlook.com (2603:10a6:4:a5::32) by AM9PR04MB7716.eurprd04.prod.outlook.com (2603:10a6:20b:280::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6455.33; Mon, 5 Jun 2023 13:34:22 +0000 Received: from DB5EUR01FT101.eop-EUR01.prod.protection.outlook.com (2603:10a6:4:a5:cafe::57) by DB6PR0202CA0046.outlook.office365.com (2603:10a6:4:a5::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6455.31 via Frontend Transport; Mon, 5 Jun 2023 13:34:22 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 13.93.42.39) smtp.mailfrom=topicproducts.com; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=topic.nl; Received-SPF: Pass (protection.outlook.com: domain of topicproducts.com designates 13.93.42.39 as permitted sender) receiver=protection.outlook.com; client-ip=13.93.42.39; helo=westeu12-emailsignatures-cloud.codetwo.com; pr=C Received: from westeu12-emailsignatures-cloud.codetwo.com (13.93.42.39) by DB5EUR01FT101.mail.protection.outlook.com (10.152.5.163) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6477.19 via Frontend Transport; Mon, 5 Jun 2023 13:34:22 +0000 Received: from EUR04-DB3-obe.outbound.protection.outlook.com (104.47.12.55) by westeu12-emailsignatures-cloud.codetwo.com with CodeTwo SMTP Server (TLS12) via SMTP; Mon, 05 Jun 2023 13:34:21 +0000 Authentication-Results-Original: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=topic.nl; Received: from DB8PR04MB6523.eurprd04.prod.outlook.com (2603:10a6:10:10f::26) by AM0PR04MB7060.eurprd04.prod.outlook.com (2603:10a6:208:196::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6455.33; Mon, 5 Jun 2023 13:34:17 +0000 Received: from DB8PR04MB6523.eurprd04.prod.outlook.com ([fe80::4cd1:3e90:54e5:9696]) by DB8PR04MB6523.eurprd04.prod.outlook.com ([fe80::4cd1:3e90:54e5:9696%5]) with mapi id 15.20.6455.030; Mon, 5 Jun 2023 13:34:17 +0000 From: Mike Looijmans To: devicetree@vger.kernel.org, linux-clk@vger.kernel.org CC: Mike Looijmans , Conor Dooley , Krzysztof Kozlowski , Michael Turquette , Rob Herring , Stephen Boyd , linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] dt-bindings: clock: fixed-clock: Add nvmem support Date: Mon, 5 Jun 2023 15:34:09 +0200 Message-ID: <20230605133410.15076-1-mike.looijmans@topic.nl> X-Mailer: git-send-email 2.17.1 X-ClientProxiedBy: AM0PR02CA0224.eurprd02.prod.outlook.com (2603:10a6:20b:28f::31) To DB8PR04MB6523.eurprd04.prod.outlook.com (2603:10a6:10:10f::26) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DB8PR04MB6523:EE_|AM0PR04MB7060:EE_|DB5EUR01FT101:EE_|AM9PR04MB7716:EE_ X-MS-Office365-Filtering-Correlation-Id: cff79382-eda9-4992-97b1-08db65c992a1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DB8PR04MB6523.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(376002)(366004)(396003)(136003)(39840400004)(346002)(451199021)(83380400001)(42882007)(83170400001)(44832011)(54906003)(478600001)(8676002)(8936002)(41300700001)(316002)(66476007)(66946007)(66556008)(5660300002)(38100700002)(38350700002)(4326008)(6486002)(36756003)(6666004)(52116002)(2906002)(6512007)(186003)(6506007)(1076003)(26005)(2616005);DIR:OUT;SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB7060 X-CodeTwo-MessageID: 49737e2c-ba5a-4abe-a928-adb496cb9fc2.20230605133421@westeu12-emailsignatures-cloud.codetwo.com X-CodeTwoProcessed: true References: <1b153bce-a66a-45ee-a5c6-963ea6fb1c82.949ef384-8293-46b8-903f-40a477c056ae.1d0217a8-661f-4359-b77b-02222c761b01@emailsignatures365.codetwo.com> X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: DB5EUR01FT101.eop-EUR01.prod.protection.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: efe36504-e4ef-4eaa-456a-08db65c98fab X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:13.93.42.39;CTRY:NL;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:westeu12-emailsignatures-cloud.codetwo.com;PTR:westeu12-emailsignatures-cloud.codetwo.com;CAT:NONE;SFS:(13230028)(4636009)(136003)(39840400004)(396003)(346002)(376002)(451199021)(36840700001)(46966006)(47076005)(26005)(6512007)(2616005)(6506007)(1076003)(83380400001)(41300700001)(36860700001)(6486002)(6666004)(186003)(42882007)(336012)(83170400001)(478600001)(54906003)(4326008)(82310400005)(40480700001)(7636003)(7596003)(356005)(70206006)(70586007)(316002)(5660300002)(8936002)(8676002)(44832011)(2906002)(15974865002)(36756003);DIR:OUT;SFP:1101; X-OriginatorOrg: topic.nl X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jun 2023 13:34:22.2408 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cff79382-eda9-4992-97b1-08db65c992a1 X-MS-Exchange-CrossTenant-Id: 449607a5-3517-482d-8d16-41dd868cbda3 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=449607a5-3517-482d-8d16-41dd868cbda3;Ip=[13.93.42.39];Helo=[westeu12-emailsignatures-cloud.codetwo.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR01FT101.eop-EUR01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR04MB7716 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1767871190844035655?= X-GMAIL-MSGID: =?utf-8?q?1767871787354029673?= Add bindings for a fixed-rate clock that retrieves its rate from an NVMEM provider. This allows to store clock settings in EEPROM or EFUSE or similar device. Component shortages lead to boards being shipped with different clock crystals, based on what was available at the time. The clock frequency was written to EEPROM at production time. Systems can adapt to a wide range of input frequencies using the clock framework, but this required us to patch the devicetree at runtime or use some custom driver. This provides a more generic solution. Signed-off-by: Mike Looijmans --- Changes in v3: Modify fixed-clock instead of introducing nvmem-clock Changes in v2: Changed "fixed-clock" into "nvmem-clock" in dts example Add minItems:1 to nvmem-cell-names .../bindings/clock/fixed-clock.yaml | 25 ++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/clock/fixed-clock.yaml b/Documentation/devicetree/bindings/clock/fixed-clock.yaml index b0a4fb8256e2..23e4df96d3b0 100644 --- a/Documentation/devicetree/bindings/clock/fixed-clock.yaml +++ b/Documentation/devicetree/bindings/clock/fixed-clock.yaml @@ -12,7 +12,9 @@ maintainers: properties: compatible: - const: fixed-clock + enum: + - fixed-clock + - fixed-clock-nvmem "#clock-cells": const: 0 @@ -33,6 +35,27 @@ required: additionalProperties: false +if: + properties: + compatible: + contains: + const: fixed-clock-nvmem + +then: + properties: + nvmem-cells: + maxItems: 2 + description: + Reads clock-frequency and/or clock-accuracy from an NVMEM provider in + binary native integer format. The size of the NVMEM cell can be 1, 2, 4 + or 8 bytes. If the contents of the nvmem are all zeroes or all 0xff, the + value reverts to the one given in the property. + + nvmem-cell-names: + items: + - const: clock-frequency + - const: clock-accuracy + examples: - | clock {