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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ka19-20020a170907991300b0078049ab4bbasi12690326ejc.526.2022.11.02.01.39.24; Wed, 02 Nov 2022 01:39:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=BI5z3t5y; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230437AbiKBIiT (ORCPT + 99 others); Wed, 2 Nov 2022 04:38:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230440AbiKBIiO (ORCPT ); Wed, 2 Nov 2022 04:38:14 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C2C824F25 for ; Wed, 2 Nov 2022 01:38:13 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id l2so15885651pld.13 for ; Wed, 02 Nov 2022 01:38:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jQnAjVM8KfWMqcwU3yG9m91ABhfRemXy71C0Mul10HU=; b=BI5z3t5yh+o/6QROXQ6AMqcln1aDKa4g86WvBaWv08SoJh/CN4rpQJxusRiuGqubs3 0WKp/NDTUz2/m4GvxtOKJybTLZBtjcCpjj2xkSoaqzwHfLROyh4mIRqDiuEPWkeSsBJz mJ0WEEO7xVScBm9QejSv5iKbaDFRPnEY+LhjOrEGX4V9nOd91nFhC95M0GNBinOthfQA bdH9/BADrpnxUJTwYvjk2RDtf+NFSc3pPYzZs48nYMYxMoj+2vXn6IY4Yb39O1nt+p9A tr6pOV3jUfPvwEL2quP5wv98BXGLmipv9MQoUzIWqMTRMMEMsGTJcY8Ysrf5YeuUYfB+ tdCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jQnAjVM8KfWMqcwU3yG9m91ABhfRemXy71C0Mul10HU=; b=G4xY9r1x4UjPKrFUGMiOF8vSe2jadVf8wB8o3d9bwTonoDvSnNYDF/pTJLEO9VAgZ+ bf3AxrpSnxVeM6F/YaOBb12BjuzPHgW8hNiMD36wz1BhA4R5YhrYq9zIC21CMPbG8uM/ XCX28gdvEAo0zAYo6WFuSz3lkZd7F0GcabDRMT0FurDYv8tOd0mcj6XUi0yT0N7kN32C Ya7LSGHybYi3GygWuO/D33COI8fdhXvIdNvF41iNK8GEWlYCNES4WhHNGMurpV7Dwc6p V15GDhP4LMc2C/qzwjhoEBoK4uhx9dr/eWylCAL4ERLDwcjDKiKtYPy2iovMw4zjNKyF 8lLw== X-Gm-Message-State: ACrzQf0sv/UQHh5eKl82EDMHaV8pgCEOuUA13EwkfaWA7SgsKIsYIwn7 AOiq4wthPa0xWzTSyKnIOHEs X-Received: by 2002:a17:90b:1bc1:b0:213:e2af:b1f4 with SMTP id oa1-20020a17090b1bc100b00213e2afb1f4mr15165846pjb.47.1667378292730; Wed, 02 Nov 2022 01:38:12 -0700 (PDT) Received: from localhost.localdomain ([117.193.209.178]) by smtp.gmail.com with ESMTPSA id x19-20020aa79573000000b0056bcb102e7bsm7887770pfq.68.2022.11.02.01.38.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Nov 2022 01:38:11 -0700 (PDT) From: Manivannan Sadhasivam To: andersson@kernel.org, viresh.kumar@linaro.org, krzysztof.kozlowski+dt@linaro.org, rafael@kernel.org, robh+dt@kernel.org Cc: johan@kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Manivannan Sadhasivam , Rob Herring Subject: [PATCH v3 1/3] dt-bindings: cpufreq: cpufreq-qcom-hw: Add cpufreq clock provider Date: Wed, 2 Nov 2022 14:07:49 +0530 Message-Id: <20221102083751.56330-2-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221102083751.56330-1-manivannan.sadhasivam@linaro.org> References: <20221102083751.56330-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-0.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_SORBS_WEB,SPF_HELO_NONE,SPF_PASS 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-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748372960752453091?= X-GMAIL-MSGID: =?utf-8?q?1748372960752453091?= Qualcomm platforms making use of CPUFreq HW Engine (EPSS/OSM) supply clocks to the CPU cores. Document the same in the binding to reflect the actual implementation. CPUFreq HW will become the clock provider and CPU cores will become the clock consumers. The clock index for each CPU core is based on the frequency domain index. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Rob Herring --- .../devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml index cbba8979fe0e..2e0336163ffb 100644 --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml @@ -57,6 +57,9 @@ properties: '#freq-domain-cells': const: 1 + '#clock-cells': + const: 1 + required: - compatible - reg @@ -84,6 +87,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_0>; qcom,freq-domain = <&cpufreq_hw 0>; + clocks = <&cpufreq_hw 0>; L2_0: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -100,6 +104,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_100>; qcom,freq-domain = <&cpufreq_hw 0>; + clocks = <&cpufreq_hw 0>; L2_100: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -113,6 +118,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_200>; qcom,freq-domain = <&cpufreq_hw 0>; + clocks = <&cpufreq_hw 0>; L2_200: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -126,6 +132,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_300>; qcom,freq-domain = <&cpufreq_hw 0>; + clocks = <&cpufreq_hw 0>; L2_300: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -139,6 +146,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_400>; qcom,freq-domain = <&cpufreq_hw 1>; + clocks = <&cpufreq_hw 1>; L2_400: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -152,6 +160,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_500>; qcom,freq-domain = <&cpufreq_hw 1>; + clocks = <&cpufreq_hw 1>; L2_500: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -165,6 +174,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_600>; qcom,freq-domain = <&cpufreq_hw 1>; + clocks = <&cpufreq_hw 1>; L2_600: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -178,6 +188,7 @@ examples: enable-method = "psci"; next-level-cache = <&L2_700>; qcom,freq-domain = <&cpufreq_hw 1>; + clocks = <&cpufreq_hw 1>; L2_700: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -198,6 +209,7 @@ examples: clock-names = "xo", "alternate"; #freq-domain-cells = <1>; + #clock-cells = <1>; }; }; ... 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But this relationship is not represented in DTS so far. So let's make cpufreq node as the clock provider and CPU nodes as the consumers. The clock index for each CPU node is based on the frequency domain index. Signed-off-by: Manivannan Sadhasivam --- arch/arm64/boot/dts/qcom/sm8450.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi index 6c18cfca9a34..8f26cf9aad01 100644 --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi @@ -52,6 +52,7 @@ CPU0: cpu@0 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 0>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 0>; L2_0: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -71,6 +72,7 @@ CPU1: cpu@100 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 0>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 0>; L2_100: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -87,6 +89,7 @@ CPU2: cpu@200 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 0>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 0>; L2_200: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -103,6 +106,7 @@ CPU3: cpu@300 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 0>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 0>; L2_300: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -119,6 +123,7 @@ CPU4: cpu@400 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 1>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 1>; L2_400: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -135,6 +140,7 @@ CPU5: cpu@500 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 1>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 1>; L2_500: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -152,6 +158,7 @@ CPU6: cpu@600 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 1>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 1>; L2_600: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -168,6 +175,7 @@ CPU7: cpu@700 { power-domain-names = "psci"; qcom,freq-domain = <&cpufreq_hw 2>; #cooling-cells = <2>; + clocks = <&cpufreq_hw 2>; L2_700: l2-cache { compatible = "cache"; next-level-cache = <&L3_0>; @@ -3804,6 +3812,7 @@ cpufreq_hw: cpufreq@17d91000 { ; interrupt-names = "dcvsh-irq-0", "dcvsh-irq-1", "dcvsh-irq-2"; #freq-domain-cells = <1>; + #clock-cells = <1>; }; gem_noc: interconnect@19100000 { From patchwork Wed Nov 2 08:37:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 14086 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp3489270wru; Wed, 2 Nov 2022 01:40:27 -0700 (PDT) X-Google-Smtp-Source: AMsMyM4gSojyx22GPCIrvs7fcJKFIu6uK7BX8W5IFtghoVb8YziQjQxo3/vkKuXEiFETUYWTM+CE X-Received: by 2002:aa7:d650:0:b0:462:d945:3801 with SMTP id v16-20020aa7d650000000b00462d9453801mr23432571edr.117.1667378426768; Wed, 02 Nov 2022 01:40:26 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1667378426; cv=none; d=google.com; s=arc-20160816; b=WMBLMdVKX7p82tDHMU63hL+CJggpHbXoiXnmPYRoM6lsnukImphuCWfiT5FPkw5ioR o5JnCcQTuYsVmsrE0ZNCgMCCT77Y81MiOED3O/Rs0nY/JizOQFO4+3lrgssL0jHqhpzL vhNFoHqlmWYOmdCUhCORjrwD2SP5Fcjr/RCnAU2mJRPaThqqRBG/c3x2nNpwK812TeM1 Oue1EXrL98FzFQhA0yQSXCeiz4qoDqaUl2zL+gtT5I11WKGHSisP5YnRLa4vnBEBTymS LciOFhel0IZegZlhrMNyAmX4VLipo9vIltePtmpLpmORkd4hQMw8YfD6vHkDxtiG1lsz SIvg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=0dhoFn1ZtCyAs/+qCp2eCTiNCa1Q3Al3mgUmbiNZfxI=; b=WzywSFuRByHSL2YaFE7gn3unMniNo5vp1OywgL+e/jpi9eD/0/urtWGcs7THhmxcaz +adFrLrAOCk9XQHUr3hwkralyv/urYtY1izB/39kmyHbpAI7Ymfuo/Qyc6TuTeRAwfA1 O5GNQKQNce2hUKMEM/b/VRNxqP2dgGOqse1M0cuyFKWq/i4q1GsDJ6xcUHyDxhsNxrCc zqAt8LI5YyoG7UbSOkK4+w7Tb8mL/EwUyQNQkv2nQfSSuJxT/ZHsmelNT9l6PEvnPAv3 OGKg5dbhQp3gwLcRX2qRi2cWgwOPqIc7dPXfETh7pACvG8CvRRgL6FEPlkbCvuFBNZnN 5QYQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=UWRy0RPp; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. 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But this relationship is not represented with the clk framework so far. So, let's make the qcom-cpufreq-hw driver a clock provider. This makes the clock producer/consumer relationship cleaner and is also useful for CPU related frameworks like OPP to know the frequency at which the CPUs are running. The clock frequency provided by the driver is for each frequency domain. We cannot get the frequency of each CPU core because, not all platforms support per-core DCVS feature. Also the frequency supplied by the driver is the actual frequency that comes out of the EPSS/OSM block after the DCVS operation. This frequency is not same as what the CPUFreq framework has set but it is the one that gets supplied to the CPUs after throttling by LMh. Signed-off-by: Manivannan Sadhasivam --- drivers/cpufreq/qcom-cpufreq-hw.c | 43 +++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 76f840636828..b824f1bb04f4 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -4,6 +4,7 @@ */ #include +#include #include #include #include @@ -53,6 +54,7 @@ struct qcom_cpufreq_data { bool cancel_throttle; struct delayed_work throttle_work; struct cpufreq_policy *policy; + struct clk_hw cpu_clk; bool per_core_dcvs; }; @@ -601,8 +603,20 @@ static struct cpufreq_driver cpufreq_qcom_hw_driver = { .ready = qcom_cpufreq_ready, }; +static unsigned long qcom_cpufreq_hw_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct qcom_cpufreq_data *data = container_of(hw, struct qcom_cpufreq_data, cpu_clk); + + return qcom_lmh_get_throttle_freq(data) / HZ_PER_KHZ; +} + +static const struct clk_ops qcom_cpufreq_hw_clk_ops = { + .recalc_rate = qcom_cpufreq_hw_recalc_rate, +}; + static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) { + struct clk_hw_onecell_data *clk_data; struct device *dev = &pdev->dev; struct device *cpu_dev; struct clk *clk; @@ -645,8 +659,16 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) qcom_cpufreq.soc_data = of_device_get_match_data(dev); + clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, num_domains), GFP_KERNEL); + if (!clk_data) + return -ENOMEM; + + clk_data->num = num_domains; + for (i = 0; i < num_domains; i++) { struct qcom_cpufreq_data *data = &qcom_cpufreq.data[i]; + struct clk_init_data init = {}; + const char *clk_name; struct resource *res; void __iomem *base; @@ -658,6 +680,27 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) data->base = base; data->res = res; + + /* Register CPU clock for each frequency domain */ + clk_name = devm_kasprintf(dev, GFP_KERNEL, "qcom_cpufreq%d", i); + init.name = clk_name; + init.flags = CLK_GET_RATE_NOCACHE; + init.ops = &qcom_cpufreq_hw_clk_ops; + data->cpu_clk.init = &init; + + ret = devm_clk_hw_register(dev, &data->cpu_clk); + if (ret < 0) { + dev_err(dev, "Failed to register Qcom CPUFreq clock\n"); + return ret; + } + + clk_data->hws[i] = &data->cpu_clk; + } + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data); + if (ret < 0) { + dev_err(dev, "Failed to add Qcom CPUFreq clock provider\n"); + return ret; } ret = cpufreq_register_driver(&cpufreq_qcom_hw_driver);