From patchwork Wed Jan 23 16:49:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 1030066 X-Patchwork-Delegate: uboot@andestech.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=wdc.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=wdc.com header.i=@wdc.com header.b="PnaIe3Bc"; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b="aS0dntPK"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 43lBHq0bw2z9s3l for ; Thu, 24 Jan 2019 03:55:51 +1100 (AEDT) Received: by lists.denx.de (Postfix, from userid 105) id BC989C21DAF; Wed, 23 Jan 2019 16:55:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=KHOP_BIG_TO_CC, RCVD_IN_DNSWL_BLOCKED, T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 28881C21C3F; Wed, 23 Jan 2019 16:52:40 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 512A5C21E07; Wed, 23 Jan 2019 16:50:02 +0000 (UTC) Received: from esa3.hgst.iphmx.com (esa3.hgst.iphmx.com [216.71.153.141]) by lists.denx.de (Postfix) with ESMTPS id 05025C21DFB for ; Wed, 23 Jan 2019 16:49:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1548262198; x=1579798198; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=j2xOqSoyNTvnAx2rO2/y99yEdFTTwdTnX4Ctr9VDTLY=; b=PnaIe3Bc+GNVZsLfB7bEsnfymK0Ux6JyIyItnHQyXdZq7C7CsK9mDGCq 2+ytQZ5mI3TA83IbjXPdspmunYOZHAI58W/ki1F6Bzft7Bz45fxr+E45q o0SWh3hNuRE/ZPXdZGok2PPKLIepkvST+dvAJNeuqIX8CdbBFgo9iJxr1 StvHVUZmwNWnTVGuUn+WsFBdahbfY3L269P+RLxg+M+NYCDhz0PxFoLwO pnJFWIlLYGOQd7GwHJoQqB2Ws+PflvvIjgFCQMg/k2qkV+dwnJ+GdFknE flV4TkaT+2IuSB4oVDQu76tSevIOJVobSpZjiz2odrXMiarP7xaiXocDg w==; X-IronPort-AV: E=Sophos;i="5.56,512,1539619200"; d="scan'208";a="104534176" Received: from mail-bn3nam04lp2053.outbound.protection.outlook.com (HELO NAM04-BN3-obe.outbound.protection.outlook.com) ([104.47.46.53]) by ob1.hgst.iphmx.com with ESMTP; 24 Jan 2019 00:49:47 +0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sharedspace.onmicrosoft.com; s=selector1-wdc-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=58YYheTlhbxesFF+9P3MZugiQgTQAiV4i2BYlCsJ3NU=; b=aS0dntPKaqp754H7h3UOiVDrEE6rJ+1GUG6CxfRDVNJ7iO1JhR+mlxdwlMyykySjMdajYqNQ/qAYdaXpOs3stIkOQ+EXiimmJnXKaerDp431D0CBt0HRLH2yp2ccAg7KrtmstlrL+cr71C1V74DCFsB6hNag69sm4sfXIOQOC70= Received: from BYAPR04MB5303.namprd04.prod.outlook.com (20.178.49.148) by BYAPR04MB5110.namprd04.prod.outlook.com (52.135.235.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1558.16; Wed, 23 Jan 2019 16:49:43 +0000 Received: from BYAPR04MB5303.namprd04.prod.outlook.com ([fe80::add1:92cc:65d7:5d94]) by BYAPR04MB5303.namprd04.prod.outlook.com ([fe80::add1:92cc:65d7:5d94%2]) with mapi id 15.20.1537.031; Wed, 23 Jan 2019 16:49:43 +0000 From: Anup Patel To: Rick Chen , Bin Meng , Joe Hershberger , Michal Simek , Michal Simek , Lukas Auer , Masahiro Yamada , Simon Glass Thread-Topic: [PATCH v4 10/15] clk: Add fixed-factor clock driver Thread-Index: AQHUszujlSuWYu/nP0yZl6kIzJJnPQ== Date: Wed, 23 Jan 2019 16:49:43 +0000 Message-ID: <20190123164808.128994-11-anup.patel@wdc.com> References: <20190123164808.128994-1-anup.patel@wdc.com> In-Reply-To: <20190123164808.128994-1-anup.patel@wdc.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MA1PR01CA0077.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00::17) To BYAPR04MB5303.namprd04.prod.outlook.com (2603:10b6:a03:c8::20) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Anup.Patel@wdc.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.17.1 x-originating-ip: [49.207.49.227] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; BYAPR04MB5110; 6:ek2RqvrN0ZbASPQHSeIUT1NXHrUqZ9Fu0+/alrT/WBmvRauYUD6/91Q+EXiwPCwehTNvZaC2KZEDwowg2tpaAeIEgQGM421I53xnsSIkWCpdn6rTZQKTsPA4OmqEuuQd7Z2L2hr1gG9SZQj4TobYIDBn/PC1A19m2nRutpJFqw/BQMldcUaSirb9khFhKJF/NHkuIEuFz6LPdyC67guZHT+X2miJfqu5ssGjiHPoM6jUnDgeqaQOH5YB1sNN3VVwL7iqr3ywTpOTDscCHLyBmFdzSBDECuE9po3YhL1ova27c9o9+R74LXWE1qqFzbD/1761ExnTOKjzPZckUwG3szsoAAn2LQVFCxV1P7bPwxJgnsHuIREPgspngyI5/Wb/8VHBCiwZWDMtJY2REKYnZ3c87xt9SprQyCw+ALFNCLsNdP/aGevzxvdPL+Yfrb1IVcLdrXftL9LlrgbK8yCtAg==; 5:qR5VrDR3UliH60avgrZVKfguSHEiyaLasUDHK22FMUiGX9+nwo7wVxw+ZjLUSm65wVqhv6UfoU5+QAhkqdSZKnqVGUO+WzWhLLtISUryXnY2GrfRA0I2Fluid9UU0fRMlWspGr6RYLppjfA1S9PuC43CFJTEn6uMHYTRMkVpRLDwbKuaJpAg+K5BO3o07cr5USsviwAN5gz0qyJoB20wPg==; 7:aQ5BT0ckmNA2uNH3eqAXxIwrIPaNoW68p+2CHjkdjCbtFB0Dc6Eh52YGXfP6zcduslCXxptMDcDWlZek/3p4iDkhgZuptHTDWg8JcrIOjfvezvf1h42If3cw1E6KomKIjqMb67vccioPN6zJAVZYAg== x-ms-office365-filtering-correlation-id: 3cc81735-0658-44d7-0681-08d68152c5ec x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(5600110)(711020)(4605077)(4618075)(4534185)(7168020)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7153060)(7193020); SRVR:BYAPR04MB5110; x-ms-traffictypediagnostic: BYAPR04MB5110: wdcipoutbound: EOP-TRUE x-microsoft-antispam-prvs: x-forefront-prvs: 0926B0E013 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(366004)(346002)(39860400002)(136003)(376002)(396003)(189003)(199004)(99286004)(2906002)(110136005)(7416002)(486006)(50226002)(54906003)(316002)(52116002)(6512007)(76176011)(53936002)(36756003)(97736004)(71200400001)(71190400001)(476003)(86362001)(8936002)(14454004)(1076003)(68736007)(2616005)(102836004)(386003)(6506007)(25786009)(11346002)(66066001)(3846002)(106356001)(6116002)(55236004)(72206003)(44832011)(81166006)(81156014)(6486002)(478600001)(39060400002)(14444005)(256004)(26005)(4326008)(7736002)(6436002)(305945005)(186003)(105586002)(446003)(8676002); DIR:OUT; SFP:1102; SCL:1; SRVR:BYAPR04MB5110; H:BYAPR04MB5303.namprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: g7lzYu5R/b3qn0YJQ6Fs5tj0voENnCPox23kEbd9pK/5aFgkf2Qag6eXaOeF6/PHzyEYphT9zSp5raRJ22715n4NWt8Tw2c24s4nHumGk6Lpi7lZtUW5y0G7BO61Bi0gDdn5HDCqeIjlw3iTgGnnKptESbHrLF3rfErW/Lx8TarRU3s5pHaMqeyuQ2xUPjPEKANT7Zdv1ifwTDfJIIF4diRDJPGU7+mDP5AX7kqkEArbVBTka1IC1DofRD5K3wPcSj+hmWlAgR3Xc41BsKjkBm4F71onXzivzwiK6vJ+2KGv2xbYOXeE6kX+qE7sg+Gv9biWqEUDHnDQUYk3J2r432wO2CH8fNwQYCHZxCTBfUldWg1youovSuVMofiz7NTDKGRBomr8zz9RUVPG2D+1RRGGTJKP4w6thyeApLuZaZw= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3cc81735-0658-44d7-0681-08d68152c5ec X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Jan 2019 16:49:38.8293 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB5110 Cc: Palmer Dabbelt , U-Boot Mailing List , Alexander Graf , Christoph Hellwig , Paul Walmsley Subject: [U-Boot] [PATCH v4 10/15] clk: Add fixed-factor clock driver X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" This patch adds fixed-factor clock driver which derives clock rate by dividing (div) and multiplying (mult) fixed factors to a parent clock. Signed-off-by: Atish Patra Signed-off-by: Anup Patel --- drivers/clk/Makefile | 4 +- drivers/clk/clk_fixed_factor.c | 72 ++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+), 1 deletion(-) create mode 100644 drivers/clk/clk_fixed_factor.c diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 2f4446568c..fa59259ea3 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -4,7 +4,9 @@ # Wolfgang Denk, DENX Software Engineering, wd@denx.de. # -obj-$(CONFIG_$(SPL_TPL_)CLK) += clk-uclass.o clk_fixed_rate.o +obj-$(CONFIG_$(SPL_TPL_)CLK) += clk-uclass.o +obj-$(CONFIG_$(SPL_TPL_)CLK) += clk_fixed_rate.o +obj-$(CONFIG_$(SPL_TPL_)CLK) += clk_fixed_factor.o obj-y += imx/ obj-y += tegra/ diff --git a/drivers/clk/clk_fixed_factor.c b/drivers/clk/clk_fixed_factor.c new file mode 100644 index 0000000000..f2630248c2 --- /dev/null +++ b/drivers/clk/clk_fixed_factor.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019 Western Digital Corporation or its affiliates. + * + * Author: Anup Patel + */ + +#include +#include +#include +#include + +struct clk_fixed_factor { + struct clk parent; + unsigned int div; + unsigned int mult; +}; + +#define to_clk_fixed_factor(dev) \ + ((struct clk_fixed_factor *)dev_get_platdata(dev)) + +static ulong clk_fixed_factor_get_rate(struct clk *clk) +{ + int ret; + struct clk_fixed_factor *ff = to_clk_fixed_factor(clk->dev); + + if (clk->id != 0) + return -EINVAL; + + ret = clk_get_rate(&ff->parent); + if (IS_ERR_VALUE(ret)) + return ret; + + do_div(ret, ff->div); + + return ret * ff->mult; +} + +const struct clk_ops clk_fixed_factor_ops = { + .get_rate = clk_fixed_factor_get_rate, +}; + +static int clk_fixed_factor_ofdata_to_platdata(struct udevice *dev) +{ + int err; + struct clk_fixed_factor *ff = to_clk_fixed_factor(dev); + + err = clk_get_by_index(dev, 0, &ff->parent); + if (err) + return err; + + ff->div = dev_read_u32_default(dev, "clock-div", 1); + ff->mult = dev_read_u32_default(dev, "clock-mult", 1); + + return 0; +} + +static const struct udevice_id clk_fixed_factor_match[] = { + { + .compatible = "fixed-factor-clock", + }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(clk_fixed_factor) = { + .name = "fixed_factor_clock", + .id = UCLASS_CLK, + .of_match = clk_fixed_factor_match, + .ofdata_to_platdata = clk_fixed_factor_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct clk_fixed_factor), + .ops = &clk_fixed_factor_ops, +};