From patchwork Tue May 7 06:53:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xingyu Wu X-Patchwork-Id: 13656338 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 81AE2C25B5F for ; Tue, 7 May 2024 06:53:56 +0000 (UTC) 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:References:In-Reply-To: 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: List-Owner; bh=9Pz+dXAVbkyutb4WnwDekKdxtZl6Mv3QyVyyJTwbOwQ=; b=F1S6NCPZOgxKFo C8a2+Tti22HUFHQbqtPm0zpTP/95vzOCGacVAtN1B5vb4/7a3+IxNT6VpO6hWxbp7jcsoMAK0wuqF tdnpcOqwAeD273Ulkyfsx90LUw/yySa9u/kzUJ4LfiEAIqo6lRmwmMLKOrSapMoVHP+ixCPRRsUIr K5uoLDKzNPztM8w686+GYsRTuJbbLzJzU2/p6GD/pCcddfJc4Zev3bbHFOUFD0OhjkG14utw2PRKr G22J+9yGpohjRzInt5Bko5ps18fobv3CJqFDxV9jV6MU2GMWvrFEGfLBTCWTtN+XNfLqCGvP5auRY jKJBNXGTvX+z+iSWbolA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s4Ehz-00000009tfT-0Xa5; Tue, 07 May 2024 06:53:51 +0000 Received: from mail-sh0chn02on20724.outbound.protection.partner.outlook.cn ([2406:e500:4420:2::724] helo=CHN02-SH0-obe.outbound.protection.partner.outlook.cn) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s4Ehw-00000009tdE-1HsI for linux-riscv@lists.infradead.org; Tue, 07 May 2024 06:53:49 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=LRIhjox5LY2IEuMSvjCeZWfEHC8bQMFUc/yBDfTXs0TVd5k2wEGQqX9nyJa7lp156InFEnLs4IuIN0bCh4LSGcKNTFSICmzDZO7HUn5aFR7kMs3Wy4QwzRzCPl6R5ygno3Y4NFiyGvxkvHo50NODCqoeAoyYXiCV/bu2K28Yk6y77/R2ZEZ52KdbTZjLPOExlN6HxgQL0mChDh76rZrmnqRsmjqdRo8EqY5XFPjltfjVd+EBkgysa93YD9bmQy5jsPIe3sh0jm+lqKdN0+Iby2E7UNGgOwhnGCdMDXUCOPdQFtF+GPpwP9egbLZAoTlAG3ALFuM92/9KKmnDR0GGMw== 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=HsKXRjNxpLy5oL+nixW6k3X0zh3KH6nERM5pf9BfTh8=; b=BPnvGKBRFwxNxJlIk06uU13caWlTc7RMEfaqaBWutSS7CaFS4MePKXWylGCq8ZNW21rv0m1xhoJ1Fh50qrhDMIyw7+1703jFRY81SGEr6aY+En4PonZ5DrYMOzEAAtasuiow7PhN0b/Mmvu7/xNZs0iHtxSrU7CcNTcuR6Fa5W7twQG1/RSgfEPyOraWLkanU8TXxSZM/NHrt07d0OLV02/hB8RzDBvKWeU9AXBYy2e9f32fI32m1/5ecHelYxqExQsVTIDv4VfjDucEerehD119Qt37gIQjoiu/pWLbvBSmYtt97kO4hj+/CeqoYV1EPog8ivkOurm6wtbgTvPagQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=starfivetech.com; dmarc=pass action=none header.from=starfivetech.com; dkim=pass header.d=starfivetech.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=starfivetech.com; Received: from NTZPR01MB0956.CHNPR01.prod.partner.outlook.cn (2406:e500:c510:8::10) by NTZPR01MB1100.CHNPR01.prod.partner.outlook.cn (2406:e500:c510:8::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7472.44; Tue, 7 May 2024 06:53:27 +0000 Received: from NTZPR01MB0956.CHNPR01.prod.partner.outlook.cn ([fe80::e903:99a6:10b7:304d]) by NTZPR01MB0956.CHNPR01.prod.partner.outlook.cn ([fe80::e903:99a6:10b7:304d%6]) with mapi id 15.20.7472.044; Tue, 7 May 2024 06:53:27 +0000 From: Xingyu Wu To: Michael Turquette , Stephen Boyd , Conor Dooley , Emil Renner Berthing , Rob Herring , Krzysztof Kozlowski Cc: Paul Walmsley , Palmer Dabbelt , Albert Ou , Hal Feng , Xingyu Wu , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH v5 1/2] clk: starfive: jh7110-sys: Add notifier for PLL0 clock Date: Tue, 7 May 2024 14:53:18 +0800 Message-Id: <20240507065319.274976-2-xingyu.wu@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240507065319.274976-1-xingyu.wu@starfivetech.com> References: <20240507065319.274976-1-xingyu.wu@starfivetech.com> X-ClientProxiedBy: SH0PR01CA0020.CHNPR01.prod.partner.outlook.cn (2406:e500:c311:5::32) To NTZPR01MB0956.CHNPR01.prod.partner.outlook.cn (2406:e500:c510:8::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: NTZPR01MB0956:EE_|NTZPR01MB1100:EE_ X-MS-Office365-Filtering-Correlation-Id: 97fd2099-bc7f-4544-9e83-08dc6e62658c X-MS-Exchange-SenderADCheck: 1 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:NTZPR01MB0956.CHNPR01.prod.partner.outlook.cn;PTR:;CAT:NONE;SFS:(13230031)(1800799015)(366007)(41320700004)(52116005)(7416005)(38350700005);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: starfivetech.com X-MS-Exchange-CrossTenant-Network-Message-Id: 97fd2099-bc7f-4544-9e83-08dc6e62658c X-MS-Exchange-CrossTenant-AuthSource: NTZPR01MB0956.CHNPR01.prod.partner.outlook.cn X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 May 2024 06:53:27.0655 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 06fe3fa3-1221-43d3-861b-5a4ee687a85c X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 2b/6dNvnwep52ugACydxk34v0QdM1sIQRAKoXSuRZZji8BSl2wn6Lu9sOdnswx8WKJbj121J4ryl6pW2eSjcyIdJg28FhCktOjDzCOpyHPA= X-MS-Exchange-Transport-CrossTenantHeadersStamped: NTZPR01MB1100 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240506_235348_370839_62E50E57 X-CRM114-Status: GOOD ( 16.67 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add notifier function for PLL0 clock. In the function, the cpu_root clock should be operated by saving its current parent and setting a new safe parent (osc clock) before setting the PLL0 clock rate. After setting PLL0 rate, it should be switched back to the original parent clock. Fixes: e2c510d6d630 ("riscv: dts: starfive: Add cpu scaling for JH7110 SoC") Signed-off-by: Xingyu Wu Reviewed-by: Emil Renner Berthing --- .../clk/starfive/clk-starfive-jh7110-sys.c | 31 ++++++++++++++++++- drivers/clk/starfive/clk-starfive-jh71x0.h | 2 ++ 2 files changed, 32 insertions(+), 1 deletion(-) diff --git a/drivers/clk/starfive/clk-starfive-jh7110-sys.c b/drivers/clk/starfive/clk-starfive-jh7110-sys.c index 8f5e5abfa178..dafa3ae71751 100644 --- a/drivers/clk/starfive/clk-starfive-jh7110-sys.c +++ b/drivers/clk/starfive/clk-starfive-jh7110-sys.c @@ -385,6 +385,32 @@ int jh7110_reset_controller_register(struct jh71x0_clk_priv *priv, } EXPORT_SYMBOL_GPL(jh7110_reset_controller_register); +/* + * This clock notifier is called when the rate of PLL0 clock is to be changed. + * The cpu_root clock should save the curent parent clock and swicth its parent + * clock to osc before PLL0 rate will be changed. Then swicth its parent clock + * back after the PLL0 rate is completed. + */ +static int jh7110_pll0_clk_notifier_cb(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct jh71x0_clk_priv *priv = container_of(nb, struct jh71x0_clk_priv, pll_clk_nb); + struct clk *cpu_root = priv->reg[JH7110_SYSCLK_CPU_ROOT].hw.clk; + int ret = 0; + + if (action == PRE_RATE_CHANGE) { + struct clk *osc = clk_get(priv->dev, "osc"); + + priv->original_clk = clk_get_parent(cpu_root); + ret = clk_set_parent(cpu_root, osc); + clk_put(osc); + } else if (action == POST_RATE_CHANGE) { + ret = clk_set_parent(cpu_root, priv->original_clk); + } + + return notifier_from_errno(ret); +} + static int __init jh7110_syscrg_probe(struct platform_device *pdev) { struct jh71x0_clk_priv *priv; @@ -413,7 +439,10 @@ static int __init jh7110_syscrg_probe(struct platform_device *pdev) if (IS_ERR(priv->pll[0])) return PTR_ERR(priv->pll[0]); } else { - clk_put(pllclk); + priv->pll_clk_nb.notifier_call = jh7110_pll0_clk_notifier_cb; + ret = clk_notifier_register(pllclk, &priv->pll_clk_nb); + if (ret) + return ret; priv->pll[0] = NULL; } diff --git a/drivers/clk/starfive/clk-starfive-jh71x0.h b/drivers/clk/starfive/clk-starfive-jh71x0.h index 23e052fc1549..e3f441393e48 100644 --- a/drivers/clk/starfive/clk-starfive-jh71x0.h +++ b/drivers/clk/starfive/clk-starfive-jh71x0.h @@ -114,6 +114,8 @@ struct jh71x0_clk_priv { spinlock_t rmw_lock; struct device *dev; void __iomem *base; + struct clk *original_clk; + struct notifier_block pll_clk_nb; struct clk_hw *pll[3]; struct jh71x0_clk reg[]; };