From patchwork Tue Jan 22 19:59:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Shtylyov X-Patchwork-Id: 10776205 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 28E9C1390 for ; Tue, 22 Jan 2019 19:59:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 175C82B6F3 for ; Tue, 22 Jan 2019 19:59:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0ADBC2B883; Tue, 22 Jan 2019 19:59:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 77DFB2B6F3 for ; Tue, 22 Jan 2019 19:59:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726009AbfAVT7k (ORCPT ); Tue, 22 Jan 2019 14:59:40 -0500 Received: from mail-lj1-f195.google.com ([209.85.208.195]:35814 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725862AbfAVT7k (ORCPT ); Tue, 22 Jan 2019 14:59:40 -0500 Received: by mail-lj1-f195.google.com with SMTP id x85-v6so21821869ljb.2 for ; Tue, 22 Jan 2019 11:59:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cogentembedded-com.20150623.gappssmtp.com; s=20150623; h=subject:from:to:references:organization:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=jx3qFbaEtJXxaHPqMOOSkAqfrMwSN13MlLYOuyS4TfE=; b=hssDkxBFqKL5R9hiffdUyZMect8HDLjopWFtwF1DUkiqcxw4WHianKsdqsPlIPGjsH N3kle69kkydJ+VEgafJPsUEavecZbmhS7YJ45piX2a5fbxuXDdeUvGGCraH1OQdXDyNi HrUUfgrCMcF6nPWnaQXESlhiNXoYCzQNYtJOdfOFXelXzv/uCylqYh9I2bnj2TO6rj4q H+2GQ6tgxtkJrEv1czgC4ygtM+3Neksd8h0nXDyIh5CvVGPU6rTwM3giy4lTL0PGCwvb xbtttEldWkzZSILsx8dOkEzuQsd1PFdXWSVdE9npvY/v6x/buhWYp5YAfUbPEPxNS6Jk 5ccw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:references:organization :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=jx3qFbaEtJXxaHPqMOOSkAqfrMwSN13MlLYOuyS4TfE=; b=ccaDtf80cKnco8R1aF5uU/rEtsKR2IkcAabGaDz+1YrhqfuNGf4mrR2ac/S+zn7iFY VK2dgCBL8MZm8872pfJnwUWERkNUZiBcfnwWAGnLjGQazBxpO6p7ntJXnKKJuFPSCA9k w32OgcHlhp8C2xIACpcidm/pP9PnFH1ducpAB62cZPc8G79OzC+4DQYqanjYFHzNr9OL lYCBu8EArXwypvqAOVzkWUNADGRDM6U6Q48YU8EH9cLA7nzRV3X3xp4nxlvpEt0uJTOM 5pYmhr7gZP6640BxrQHKvc70DypSo2GALGI5JPldAE++yofUmSSuvJVtfW5wFJHYvw+7 ewwQ== X-Gm-Message-State: AJcUukc+BNQKjFWGDVy9JyqjJF4PWUjOpg9w5JP3ipHhOJEklH6nXcIm jv4AC8H10QVlzUgGoRdG4z+ODA== X-Google-Smtp-Source: ALg8bN7JuJ98H3l2gVPzjRqiYfuJ+6uMbQ9doV4UKEo7PptakIOFJYJfl8PqM4obxfnG3/EVjt7zLg== X-Received: by 2002:a2e:3218:: with SMTP id y24-v6mr6113870ljy.157.1548187177598; Tue, 22 Jan 2019 11:59:37 -0800 (PST) Received: from wasted.cogentembedded.com ([31.173.82.69]) by smtp.gmail.com with ESMTPSA id z2-v6sm148323ljk.50.2019.01.22.11.59.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 22 Jan 2019 11:59:36 -0800 (PST) Subject: [PATCH v3 3/4] clk: renesas: rcar-gen3-cpg: add RPC clocks From: Sergei Shtylyov To: linux-renesas-soc@vger.kernel.org, Michael Turquette , Stephen Boyd , Geert Uytterhoeven , linux-clk@vger.kernel.org References: Organization: Cogent Embedded Message-ID: <5c5dbf41-16a9-9d1a-8a29-997906696045@cogentembedded.com> Date: Tue, 22 Jan 2019 22:59:35 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-MW Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The RPCSRC internal clock is controlled by the RPCCKCR.DIV[4:3] on all the R-Car gen3 SoCs except V3M (R8A77970) but the encoding of this field is different between SoCs; it makes sense to support the most common case of this encoding in the R-Car gen3 CPG driver... After adding the RPCSRC clock, we can add the RPC[D2] clocks derived from it and controlled by the RPCCKCR register on all the R-Car gen3 SoCs except V3M (R8A77970); the composite clock driver seems handy for this task, using the spinlock added in the previous patch... Signed-off-by: Sergei Shtylyov Reviewed-by: Geert Uytterhoeven --- Changes in version 3: - added 'struct rpcd2_clock' embracing both 'struct clk_fixed_factor' and 'struct clk_gate' to reduce the # of kzalloc() calls; - added a comment about the single notifier to 'struct rpc_clock'; - refreshed the patch. Changes in version 2: - merged in the RPCD2 clock support from the next patch; - moved in the RPCSRC clock support from the R8A77980 CPG/MSSR driver patch; - switched the RPC and RPCSD2 clock support to the composite clock driver; - changed the 1st parameter of cpg_rpc[d2]_clk_register(); - rewrote the patch description, renamed the patch. drivers/clk/renesas/rcar-gen3-cpg.c | 99 ++++++++++++++++++++++++++++++++++++ drivers/clk/renesas/rcar-gen3-cpg.h | 4 + 2 files changed, 103 insertions(+) Index: renesas-drivers/drivers/clk/renesas/rcar-gen3-cpg.c =================================================================== --- renesas-drivers.orig/drivers/clk/renesas/rcar-gen3-cpg.c +++ renesas-drivers/drivers/clk/renesas/rcar-gen3-cpg.c @@ -422,6 +422,90 @@ free_clock: return clk; } +struct rpc_clock { + struct clk_divider div; + struct clk_gate gate; + /* + * One notifier covers both RPC and RPCD2 clocks as they are both + * controlled by the same RPCCKCR register... + */ + struct cpg_simple_notifier csn; +}; + +static const struct clk_div_table cpg_rpcsrc_div_table[] = { + { 2, 5 }, { 3, 6 }, { 0, 0 }, +}; + +static const struct clk_div_table cpg_rpc_div_table[] = { + { 1, 2 }, { 3, 4 }, { 5, 6 }, { 7, 8 }, { 0, 0 }, +}; + +static struct clk * __init cpg_rpc_clk_register(const char *name, + void __iomem *base, const char *parent_name, + struct raw_notifier_head *notifiers) +{ + struct rpc_clock *rpc; + struct clk *clk; + + rpc = kzalloc(sizeof(*rpc), GFP_KERNEL); + if (!rpc) + return ERR_PTR(-ENOMEM); + + rpc->div.reg = base + CPG_RPCCKCR; + rpc->div.width = 3; + rpc->div.table = cpg_rpc_div_table; + rpc->div.lock = &cpg_lock; + + rpc->gate.reg = base + CPG_RPCCKCR; + rpc->gate.bit_idx = 8; + rpc->gate.flags = CLK_GATE_SET_TO_DISABLE; + rpc->gate.lock = &cpg_lock; + + rpc->csn.reg = base + CPG_RPCCKCR; + + clk = clk_register_composite(NULL, name, &parent_name, 1, NULL, NULL, + &rpc->div.hw, &clk_divider_ops, + &rpc->gate.hw, &clk_gate_ops, 0); + if (IS_ERR(clk)) + kfree(rpc); + + cpg_simple_notifier_register(notifiers, &rpc->csn); + return clk; +} + +struct rpc2_clock { + struct clk_fixed_factor fixed; + struct clk_gate gate; +}; + +static struct clk * __init cpg_rpcd2_clk_register(const char *name, + void __iomem *base, + const char *parent_name) +{ + struct rpc2_clock *rpc2; + struct clk *clk; + + rpc2 = kzalloc(sizeof(*rpc2), GFP_KERNEL); + if (!rpc2) + return ERR_PTR(-ENOMEM); + + rpc2->fixed.mult = 1; + rpc2->fixed.div = 2; + + rpc2->gate.reg = base + CPG_RPCCKCR; + rpc2->gate.bit_idx = 9; + rpc2->gate.flags = CLK_GATE_SET_TO_DISABLE; + rpc2->gate.lock = &cpg_lock; + + clk = clk_register_composite(NULL, name, &parent_name, 1, NULL, NULL, + &rpc2->fixed.hw, &clk_fixed_factor_ops, + &rpc2->gate.hw, &clk_gate_ops, 0); + if (IS_ERR(clk)) + kfree(rpc2); + + return clk; +} + static const struct rcar_gen3_cpg_pll_config *cpg_pll_config __initdata; static unsigned int cpg_clk_extalr __initdata; @@ -600,6 +684,21 @@ struct clk * __init rcar_gen3_cpg_clk_re } break; + case CLK_TYPE_GEN3_RPCSRC: + return clk_register_divider_table(NULL, core->name, + __clk_get_name(parent), 0, + base + CPG_RPCCKCR, 3, 2, 0, + cpg_rpcsrc_div_table, + &cpg_lock); + + case CLK_TYPE_GEN3_RPC: + return cpg_rpc_clk_register(core->name, base, + __clk_get_name(parent), notifiers); + + case CLK_TYPE_GEN3_RPCD2: + return cpg_rpcd2_clk_register(core->name, base, + __clk_get_name(parent)); + default: return ERR_PTR(-EINVAL); } Index: renesas-drivers/drivers/clk/renesas/rcar-gen3-cpg.h =================================================================== --- renesas-drivers.orig/drivers/clk/renesas/rcar-gen3-cpg.h +++ renesas-drivers/drivers/clk/renesas/rcar-gen3-cpg.h @@ -23,6 +23,9 @@ enum rcar_gen3_clk_types { CLK_TYPE_GEN3_Z2, CLK_TYPE_GEN3_OSC, /* OSC EXTAL predivider and fixed divider */ CLK_TYPE_GEN3_RCKSEL, /* Select parent/divider using RCKCR.CKSEL */ + CLK_TYPE_GEN3_RPCSRC, + CLK_TYPE_GEN3_RPC, + CLK_TYPE_GEN3_RPCD2, /* SoC specific definitions start here */ CLK_TYPE_GEN3_SOC_BASE, @@ -57,6 +60,7 @@ struct rcar_gen3_cpg_pll_config { u8 osc_prediv; }; +#define CPG_RPCCKCR 0x238 #define CPG_RCKCR 0x240 struct clk *rcar_gen3_cpg_clk_register(struct device *dev,