From patchwork Fri Oct 22 13:09:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Peng Fan (OSS)" X-Patchwork-Id: 12577679 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1260C433F5 for ; Fri, 22 Oct 2021 12:34:53 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A0C6D6108B for ; Fri, 22 Oct 2021 12:34:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A0C6D6108B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oss.nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=gyaI4jhnHsCJ9D9dyYzyO55kYWY8t/RE13xI0Dh4qB8=; b=jwWdTD91nc4OTV 0j/dNZsV8awPK8AqHHNUZB+GiywALyL6GLacQARPxKZudQXCl5UEp11hyeLkI+SwOjCwCTUmsKDjD 8FqChvgq/OXVlPowkOsNwEpbAt2oxQJyvC8Gq5lyGn0i7w6yMs+86m3lPNt6NsNZpf0c6/dSu13ct TrUDq0nT9Ix3Iz89iZuodDrghzbvjN1hsARYQlgGdmBdaP4f2sOF4sIYeouQLK9qjtFp53+Uo/VTh 6Z1RxJF8ABlYqOCeXTud7SEH8XlLbkeLJaoPuN6B/vQHNZOv4aB10usdpTS7xfE3FNX5HenqgdS1J c+B4FwlUbuBA3dX1TChA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdtjk-00AshR-O2; Fri, 22 Oct 2021 12:33:29 +0000 Received: from mail-am6eur05on2041.outbound.protection.outlook.com ([40.107.22.41] helo=EUR05-AM6-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdtjg-00AsfM-Fb for linux-arm-kernel@lists.infradead.org; Fri, 22 Oct 2021 12:33:26 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=IOnZq3wP/ihxQpMOqF6tspEbGRioYnFZ1V2awXzGU5g7yBtNMtq1BB/l5Hl8sqLeH8crHhxNy/EuqOvflXRyz6TQBrEGljtYUiBr3K2jEacIcMDsWRdERp8/AR9qKjN5r/HEDwO3DabqXZTZQoAuoD69v/9vKMFdY+YEUY2O5WZcM2vunyFZdeWlkVWIkudBMZI3ChVLPZuuCSZJTyKjFsZ7+UAudtDddRiB2o2GG30X3f+PGPYrDiud56+xuGFt/ZYASPbm6QQdJchxT4jY3AqTypzg8GzCu7l4PCFW/BUbDNMCDFKFcJfZGVxeIxDrs0OymBXMcN4erlgfEFKo9Q== 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=rP86zpfjA8plyp6jYR6UD8izXfcxyja5fNqExZCux5c=; b=JaFX8i7BJbEYITajsct2+dVN5vVpdgf1EyKfUEHZsnsYavdkWFEERRgt4f+kSlASc4amsbp7fNlU9+uapSRYh+hX7KDk5ELFyzQ2gfHTqzxi9pt5rwiFnVOHI8j7Uyi78Q2fL0va6ZLCh4CQvJjGbdTkrl9FrQZtji6iJlgs3OtjOpm913lzyBye8MtnESbfL3L0MMCHFsoIsfjF05U3AfpvJq1dcqhETYD3G2X55l0crTdzMDW6ofuNryxU+WzfO13XpYBGrDjGgTinpvtooLxsRvobEZ9M+wbC97ly4inVhganAzTgS5njogxhk9e18gAxF2fxIcTfGMOO2HPjaA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector2-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=rP86zpfjA8plyp6jYR6UD8izXfcxyja5fNqExZCux5c=; b=fuGt1KuZ/75lT2vCcYjwTHre/e6a3F39/y3ISjO9hromMryKxQk0LrXWG3sQWz8WK6j6Nt6iBpqQc2eJbUrC0icwf+tvihmqzvNuSYCNnfDnlW12U0QWRpyBmoWO9JsTtwG04yPfw4BsDYnVlWnMW/PWGWybzS4pQLDHaZgWUkQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=oss.nxp.com; Received: from DU2PR04MB9020.eurprd04.prod.outlook.com (2603:10a6:10:2e3::9) by DU2PR04MB8661.eurprd04.prod.outlook.com (2603:10a6:10:2dc::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4628.16; Fri, 22 Oct 2021 12:33:20 +0000 Received: from DU2PR04MB9020.eurprd04.prod.outlook.com ([fe80::b928:9230:aa10:639a]) by DU2PR04MB9020.eurprd04.prod.outlook.com ([fe80::b928:9230:aa10:639a%9]) with mapi id 15.20.4628.018; Fri, 22 Oct 2021 12:33:20 +0000 From: "Peng Fan (OSS)" To: sboyd@kernel.org, mturquette@baylibre.com, abel.vesa@nxp.com, s.hauer@pengutronix.de Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Peng Fan Subject: [PATCH] clk: imx: gate off peripheral clock slice Date: Fri, 22 Oct 2021 21:09:46 +0800 Message-Id: <20211022130946.16683-1-peng.fan@oss.nxp.com> X-Mailer: git-send-email 2.30.0 X-ClientProxiedBy: SI2PR02CA0046.apcprd02.prod.outlook.com (2603:1096:4:196::15) To DU2PR04MB9020.eurprd04.prod.outlook.com (2603:10a6:10:2e3::9) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from linux-1xn6.ap.freescale.net (119.31.174.71) by SI2PR02CA0046.apcprd02.prod.outlook.com (2603:1096:4:196::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4628.16 via Frontend Transport; Fri, 22 Oct 2021 12:33:17 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: fd2694ea-c8b3-445d-d620-08d9955821aa X-MS-TrafficTypeDiagnostic: DU2PR04MB8661: X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6108; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:DU2PR04MB9020.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(366004)(86362001)(2616005)(1076003)(2906002)(66476007)(66946007)(5660300002)(508600001)(8936002)(186003)(6506007)(956004)(316002)(6666004)(52116002)(66556008)(4326008)(26005)(6512007)(83380400001)(38350700002)(38100700002)(6486002)(8676002); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: pWdSZ7eWbbKD//uuF/o5JgLRTrwyAf0rlBS5PHejBhAvf5L0qqfHFgxWkr7+vunB9ac4BC2fgQur+7dfe2Q3qaLGHgoeU/ZknY4TUNqWPiKMMnZXYhobzP/JRBOcb16AMtLI+XoJdOmufHKYtzx9hwq1zSda76scJk5kjTcvp0BxxMLlqJDw2dlCJRHGs3wQPbwNe2/TcwF2b8dUPsZqhoH5p2CiDFeMTLEEzmAPZaBbts6o/dikPvOFbs41/5O4FtD1XHpfEZ+dDVbpKBQqn5we5KN43tFze5zTzx/oYGHuhzqN3SZdbdv/IK+Qsd7lEh6hyvRnKdd/6c4Q7hQI7mL0Vv56DNqRrIAr2itCEtM+smSxnorPzg8ktn9L5qpHz+fvn3oD1ruQe8fgwXFUJhsLRxmRZUmjYLnzbAO0b4yPS0q2XPybBTVARjhqYg4zdWXvQuRuW7H2aN7pEakt6m/MOUaQKHKg0K9vw/MV0dWxfDTZtawhxsilnUe6sdjAWFfO3kz92sPw0KF8LTZID5MqOrOfT4OPrwO5VAd+kKq9XWYblyz0jiYKjYh+16BMWN8c7PqJLJcj+qfBd9UQROmW2fBkeeEu0Ln0rFpTCe79FVusdCU/yhyI2Ggv40Rtt8nnV3g4b3jmukIEdyVkoy25r6D/3AiNj25rdtcyoaU419UouwFfw2w3d9gPlJkMhzqLF14eePnmVnNksRMMkMniR2JShAhpn6x4BOGXee1i8SREb8lyzZ4GFWvo1uXxbx1UtByXexsieycF9dqlh+YTW9r8yYGtK99+UMQT6z+ErQ0sxmOLkXscsTk5GA0G5AD2DY7MoYqEoQbIvAHjdr0fCVTdkTqYfmU5A0PgZB9yha0X/nCZpGzw6J6+E70pTLjuP0zjk42mvo/RoMJ37ejogaFbNriGl8mxtMMQn/p12s50F8e40/7V6wUqHSACGgRPp6XPFR6iT81eM6BtZzrha5rs+4vvApRw7aA2JqmLmbeXsCyPUd570TswE8Dz4pEJzwi68eg3E4wEcwCyCHWWIJgiizlhGTbKafOyNVrhpohkhXT5Yry1HGV0qAaVskogaN6S18WF6icCASm0OgRVVAnNoSTKoaLrg0foK8Y9ZrBzJ4LW9nIs/EibTTyZMxxf42TsGjH+iK5WdgME0Im0U+IQGD+SbDhrwMsDj4Un9RuEcFHPkcvRdm8rRdMsEXGqC7HYPpqjZ2pKXI+xq/FTZpFSVBo2+9oX1M1zwGSoUmesbq1w65F91mHGqD6me3zj5S8OWYbqGNP0bEaxTLQthQd9qDF5RovuyK1YyYpzO/5XsubwbteSlDtxY5WI/BRVfCph00H/PePT6Di6fsLDLheZJZLo/4qNky9imdHVBoVo3SMJFBRWMovctwZLXNmPGMX3nU6aTzgDKlwNWJ/XIV2VAtFXVIG/Gmz4WOM= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: fd2694ea-c8b3-445d-d620-08d9955821aa X-MS-Exchange-CrossTenant-AuthSource: DU2PR04MB9020.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2021 12:33:20.7436 (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: peng.fan@nxp.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU2PR04MB8661 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211022_053324_599945_BCDA0893 X-CRM114-Status: GOOD ( 12.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Peng Fan The Peripheral clocks are default enabled when SoC power on, and bootloader not gate off the clocks when booting Linux Kernel. So Linux Kernel is not aware the peripheral clocks are enabled and still take them as disabled because of enable count is zero. Then Peripheral clock's source without clock gated off could be changed when have assigned-parents in device tree However, per i.MX8M* reference mannual, "Peripheral clock slices must be stopped to change the clock source", so need to gate off the the peripheral clock when registering the clocks to avoid glitch. Tested boot on i.MX8MM/P-EVK board Signed-off-by: Peng Fan --- drivers/clk/imx/clk-composite-8m.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c index 2dfd6149e528..ee41fbf90589 100644 --- a/drivers/clk/imx/clk-composite-8m.c +++ b/drivers/clk/imx/clk-composite-8m.c @@ -184,6 +184,7 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name, struct clk_mux *mux = NULL; const struct clk_ops *divider_ops; const struct clk_ops *mux_ops; + u32 val; mux = kzalloc(sizeof(*mux), GFP_KERNEL); if (!mux) @@ -216,8 +217,14 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name, div->width = PCG_PREDIV_WIDTH; divider_ops = &imx8m_clk_composite_divider_ops; mux_ops = &clk_mux_ops; - if (!(composite_flags & IMX_COMPOSITE_FW_MANAGED)) + if (!(composite_flags & IMX_COMPOSITE_FW_MANAGED)) { flags |= CLK_SET_PARENT_GATE; + if (!(flags & CLK_IS_CRITICAL)) { + val = readl(reg); + val &= ~BIT(PCG_CGC_SHIFT); + writel(val, reg); + } + } } div->lock = &imx_ccm_lock;