From patchwork Wed Nov 29 11:29:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Buddhabhatti, Jay" X-Patchwork-Id: 171285 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:a5a7:0:b0:403:3b70:6f57 with SMTP id d7csp270542vqn; Wed, 29 Nov 2023 03:29:52 -0800 (PST) X-Google-Smtp-Source: AGHT+IEIIEjzCDhLt9X5FESx+HCOZ6E4Iubfbfv6Z0GVyUEeYxMQKK47U/mFQXWni6Ny0wB7WYhE X-Received: by 2002:a05:6a20:3d13:b0:18c:177d:2122 with SMTP id y19-20020a056a203d1300b0018c177d2122mr17040505pzi.2.1701257391766; Wed, 29 Nov 2023 03:29:51 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1701257391; cv=pass; d=google.com; s=arc-20160816; b=V9rePKk5IDCc+O1PLsVT+40iFH3HTL9iOrIrjNhZRXKIYCdop+Ikp8nSgiYJlhD8DV E5WJFEKbRTsPuJO5r3ctvuAFgSMNbq9SCfbI+91f5KJAfBz7AnG0+pker4wi2Wc+gVxF mxbZC+ypoChgSQqEV5L194aSYfbLJEVKuLX7NebpGSMDvSf/pKSxtLowNdGpucu+xIQy weGneQxKSmjXuX0A98rbXyHChZln69RSwh/bKq27sxuKl0iBke4/Atz20hZIyXRoyvUQ Cfbd5bbk0qk7skfG66NORngeFABUW9rMEEcmR0UuK9RWEMPLsgHhl1KKWxCgRJNRWJno wUSA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=zlRqJg2qMSFYAUx4SKubFDFhDCiP2ETTgr8I2+g+9bI=; fh=qCcxsu78JX1vSL37zs8P77C3eTFXBRDXf6T38mSfIPo=; b=DlExwA/xOcxK9VaGP7pcYsHynWnVBsEk/7J+nEqQKV5qYuq0g9PrawUces8QNTOgoS gROFUM/0NzSx0qowa0slyZ2Qay+dFiJB7UqW6MWzT24QVm7xoU+8/mFAY7yl6xp2t6tD bOAHAV0e/OAYSJuMxpmGkYTiSj0h1F4QRy2JLzWpyvPBzLE07okqb8IFerYpycRC5H6I EHNIFWnglwS+9rw3cJxWvJxkd1tqRV8PQ96sUKFdP0+hsqUv7drlLLdxiIF/9nMvkOyE TlxxMF0FYz1LaI78wc6EdgROi95koMeMs5DdRQ5eWJ5O2mu4qWauPeaO4GaU8ORKJwt6 kxmw== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=jgpDcQUe; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from snail.vger.email (snail.vger.email. [23.128.96.37]) by mx.google.com with ESMTPS id a5-20020a170902ee8500b001c724f997ffsi13621385pld.131.2023.11.29.03.29.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Nov 2023 03:29:51 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37; Authentication-Results: mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=jgpDcQUe; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id AFF6A8031C61; Wed, 29 Nov 2023 03:29:50 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232049AbjK2L3g (ORCPT + 99 others); Wed, 29 Nov 2023 06:29:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232380AbjK2L3d (ORCPT ); Wed, 29 Nov 2023 06:29:33 -0500 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2068.outbound.protection.outlook.com [40.107.220.68]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E88C284; Wed, 29 Nov 2023 03:29:39 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nTrCGRKBSHgk1+XJP2snEUQtsB00Xuc16Nmb3q8nW3yonyKhI8bbLseQhX8abzFW9KgL1jsg3RyP/LbsMtt/x3NDiZsaLbMNaTplped0bKohR6AGQSn0SyMvu4DzvtE+n+4IumZkaGbXKUuEmpFBCfD6q9V1hjuV7vN3SZxESXNBw5d4ToXp+0wBzlKWAH37qxZru0bB9YURY43DeuyFP5aOhzYtCk8FKMe/QFLmp+UseoIW3PY/ij4js9+QLoagajL9ZrDeSwbx72l8qKTwX4lw8hT34V2WLOCToBMJ72NnwOe1+pDD7eLDUI8it2BR9vMWknDd7bj+9gmWkfzrQw== 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=zlRqJg2qMSFYAUx4SKubFDFhDCiP2ETTgr8I2+g+9bI=; b=LiMeIydAZWjMOYRQMnRLvB/I2FBIXY/V9PuhIY0IAKeMUnN+hFDCwKhMXxJ2/sghT+V8riofWykHz0scejf3SvOMcG14seQusPe4dfuAktJJr7RcsEu/jNA49C1NhcPCTvpdmmvB7bnUr2b2BD1YMvMjryC0Spaf4wJzz+g42FyQKNRn/p9850lDalpg/Il35OqC8hGuOrY2yRYgrTcKbBTYjMGjseCIcJcyJsXrHWnPP1c241AeTRDqZBcuYZR1rdUq7ptl5P50WpFxygZWdsVu519b6y/M+UBjJ6vymF4EWNGVT9jQ+Rk06unAkE4BxZG07lE48PiW5VUoMeTbog== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=baylibre.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=zlRqJg2qMSFYAUx4SKubFDFhDCiP2ETTgr8I2+g+9bI=; b=jgpDcQUeq52oriP3W9SW2Zx1lh8CZZhgXoPmicA1b5ZKmvuuf9h9q5U+a46H6ldTL/z0q6nKsT3sYYl1s9MO3KbaHRQniIebaIYOzwvyc4h66Jgb8RBRNv0YeV2fS/464Z4noTJ06PfI7pRQ9M3nHs9i4DZFT4qnvxXkg5jnqQg= Received: from BLAPR05CA0021.namprd05.prod.outlook.com (2603:10b6:208:36e::17) by MN0PR12MB6127.namprd12.prod.outlook.com (2603:10b6:208:3c5::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7046.22; Wed, 29 Nov 2023 11:29:36 +0000 Received: from BL02EPF0001A0FD.namprd03.prod.outlook.com (2603:10b6:208:36e:cafe::69) by BLAPR05CA0021.outlook.office365.com (2603:10b6:208:36e::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7068.8 via Frontend Transport; Wed, 29 Nov 2023 11:29:36 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL02EPF0001A0FD.mail.protection.outlook.com (10.167.242.104) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7046.17 via Frontend Transport; Wed, 29 Nov 2023 11:29:35 +0000 Received: from SATLEXMB08.amd.com (10.181.40.132) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Wed, 29 Nov 2023 05:29:35 -0600 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB08.amd.com (10.181.40.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.32; Wed, 29 Nov 2023 03:29:35 -0800 Received: from xsjarunbala50.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2507.34 via Frontend Transport; Wed, 29 Nov 2023 05:29:34 -0600 From: Jay Buddhabhatti To: , , , CC: , , , Jay Buddhabhatti Subject: [PATCH RESEND v2 2/2] drivers: clk: zynqmp: update divider round rate logic Date: Wed, 29 Nov 2023 03:29:16 -0800 Message-ID: <20231129112916.23125-3-jay.buddhabhatti@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231129112916.23125-1-jay.buddhabhatti@amd.com> References: <20231129112916.23125-1-jay.buddhabhatti@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A0FD:EE_|MN0PR12MB6127:EE_ X-MS-Office365-Filtering-Correlation-Id: a921c8ee-9181-4c7f-70bf-08dbf0ce774d 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(4636009)(376002)(346002)(136003)(396003)(39860400002)(230922051799003)(82310400011)(186009)(1800799012)(64100799003)(451199024)(46966006)(40470700004)(36840700001)(47076005)(356005)(41300700001)(44832011)(2616005)(86362001)(1076003)(8676002)(6666004)(8936002)(5660300002)(4326008)(40480700001)(2906002)(26005)(110136005)(81166007)(478600001)(316002)(70206006)(70586007)(40460700003)(426003)(54906003)(336012)(36860700001)(83380400001)(36756003)(82740400003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Nov 2023 11:29:35.8237 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a921c8ee-9181-4c7f-70bf-08dbf0ce774d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A0FD.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6127 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, 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-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Wed, 29 Nov 2023 03:29:50 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1783897670725191997 X-GMAIL-MSGID: 1783897670725191997 Currently zynqmp divider round rate is considering single parent and calculating rate and parent rate accordingly. But if divider clock flag is set to SET_RATE_PARENT then its not trying to traverse through all parent rate and not selecting best parent rate from that. So use common divider_round_rate() which is traversing through all clock parents and its rate and calculating proper parent rate. Fixes: 3fde0e16d016 ("drivers: clk: Add ZynqMP clock driver") Signed-off-by: Jay Buddhabhatti --- drivers/clk/zynqmp/divider.c | 66 +++--------------------------------- 1 file changed, 5 insertions(+), 61 deletions(-) diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c index 33a3b2a22659..5a00487ae408 100644 --- a/drivers/clk/zynqmp/divider.c +++ b/drivers/clk/zynqmp/divider.c @@ -110,52 +110,6 @@ static unsigned long zynqmp_clk_divider_recalc_rate(struct clk_hw *hw, return DIV_ROUND_UP_ULL(parent_rate, value); } -static void zynqmp_get_divider2_val(struct clk_hw *hw, - unsigned long rate, - struct zynqmp_clk_divider *divider, - u32 *bestdiv) -{ - int div1; - int div2; - long error = LONG_MAX; - unsigned long div1_prate; - struct clk_hw *div1_parent_hw; - struct zynqmp_clk_divider *pdivider; - struct clk_hw *div2_parent_hw = clk_hw_get_parent(hw); - - if (!div2_parent_hw) - return; - - pdivider = to_zynqmp_clk_divider(div2_parent_hw); - if (!pdivider) - return; - - div1_parent_hw = clk_hw_get_parent(div2_parent_hw); - if (!div1_parent_hw) - return; - - div1_prate = clk_hw_get_rate(div1_parent_hw); - *bestdiv = 1; - for (div1 = 1; div1 <= pdivider->max_div;) { - for (div2 = 1; div2 <= divider->max_div;) { - long new_error = ((div1_prate / div1) / div2) - rate; - - if (abs(new_error) < abs(error)) { - *bestdiv = div2; - error = new_error; - } - if (divider->flags & CLK_DIVIDER_POWER_OF_TWO) - div2 = div2 << 1; - else - div2++; - } - if (pdivider->flags & CLK_DIVIDER_POWER_OF_TWO) - div1 = div1 << 1; - else - div1++; - } -} - /** * zynqmp_clk_divider_round_rate() - Round rate of divider clock * @hw: handle between common and hardware-specific interfaces @@ -174,6 +128,7 @@ static long zynqmp_clk_divider_round_rate(struct clk_hw *hw, u32 div_type = divider->div_type; u32 bestdiv; int ret; + u8 width; /* if read only, just return current value */ if (divider->flags & CLK_DIVIDER_READ_ONLY) { @@ -193,23 +148,12 @@ static long zynqmp_clk_divider_round_rate(struct clk_hw *hw, return DIV_ROUND_UP_ULL((u64)*prate, bestdiv); } - bestdiv = zynqmp_divider_get_val(*prate, rate, divider->flags); - - /* - * In case of two divisors, compute best divider values and return - * divider2 value based on compute value. div1 will be automatically - * set to optimum based on required total divider value. - */ - if (div_type == TYPE_DIV2 && - (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT)) { - zynqmp_get_divider2_val(hw, rate, divider, &bestdiv); - } + width = fls(divider->max_div); - if ((clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) && divider->is_frac) - bestdiv = rate % *prate ? 1 : bestdiv; + rate = divider_round_rate(hw, rate, prate, NULL, width, divider->flags); - bestdiv = min_t(u32, bestdiv, divider->max_div); - *prate = rate * bestdiv; + if (divider->is_frac && (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) && (rate % *prate)) + *prate = rate; return rate; }