From patchwork Wed Nov 9 08:01:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 13037237 X-Patchwork-Delegate: viresh.linux@gmail.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F09FC43217 for ; Wed, 9 Nov 2022 08:02:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229554AbiKIICF (ORCPT ); Wed, 9 Nov 2022 03:02:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229687AbiKIICB (ORCPT ); Wed, 9 Nov 2022 03:02:01 -0500 Received: from mail-wr1-x429.google.com (mail-wr1-x429.google.com [IPv6:2a00:1450:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F9671CB2D for ; Wed, 9 Nov 2022 00:01:57 -0800 (PST) Received: by mail-wr1-x429.google.com with SMTP id cl5so24476954wrb.9 for ; Wed, 09 Nov 2022 00:01:57 -0800 (PST) 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=lM0qTsp6rbYbqc9pr6/MVMIZyyG5748zn5WICW4j5iw=; b=KwAXO1o3SO13QTYoT227StTfCrRajGbm/w8mo5zcghDvmOiXgc9qQB7l1DxIYNyLq2 l9MVGQaNt09MsclU189LUkWOdjV5OR6zfxOdt/M0N1YnEKklWV6zuqBa1T3/RSYM7eAj pfD3ip838TR38xsk9dactSZmRsj5f5KTjvqMgPWVvAnR5OWCNNY5CnJKC5Rz6ckGZsuy eK2tCFYxrkEjl2qcCxvqltH8kiab1jIDOhjGgC06YlxufWOJoF1HppgKd1O/JmUF2Dh4 KDtllODTZzH26pZnQf8V6KbjflgInhEzA35QuzeLguaSJe92JO1ISJvBRS17iLVvEkF7 0PVA== 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=lM0qTsp6rbYbqc9pr6/MVMIZyyG5748zn5WICW4j5iw=; b=Lezw0rQMKBeioY4+5RhDYMVdTxpNGXEiwBJQRe1OSAoolror7xzlcHCu6N5aGaFCCf 43egUXyo1/GdoHPTRqsFKrxiwBiq/sQTHm+hYI8h+DDMQ/Izo+Np/T+W2mAyqhXWXvGL sjqhpN34jq1EKMd/YU4ZD1zsMC//kyN3+CyFemfmYrQ7YwqCQMzFI/E/SRjsxl9JCz6T VYnEnOdIls3PzCEDEJOUF6/5tkve5u3mdUKImfDoMMO/1KItOA4rCcoV7lqE1Ei6+OAp 6by8VKzxAv06IU/qU9doINtJuRiF5lz3YncgQELSBAqhqSjTj2Gso0GOyu5SM73vuLVH XLyA== X-Gm-Message-State: ACrzQf1ZTHR67Vd/d9LUp9h6q4gsYncLLQjgeU7COZ8fJfF27DMemZ3Q GpFoPWIxX8Sbs/2NB5BUVPkg X-Google-Smtp-Source: AMsMyM77C82Bm88u32nZsLobuc1cSlI2gIXR21N+dKHn4tTOg9+5bR6l2o30RpKnWlLeKP25HL6wJg== X-Received: by 2002:adf:fc8d:0:b0:236:7433:2b2c with SMTP id g13-20020adffc8d000000b0023674332b2cmr36493882wrr.527.1667980915907; Wed, 09 Nov 2022 00:01:55 -0800 (PST) Received: from localhost.localdomain ([117.202.189.229]) by smtp.gmail.com with ESMTPSA id l26-20020a05600c2cda00b003cf774c31a0sm769427wmc.16.2022.11.09.00.01.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Nov 2022 00:01:55 -0800 (PST) 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 Subject: [PATCH v6 3/3] cpufreq: qcom-hw: Add CPU clock provider support Date: Wed, 9 Nov 2022 13:31:20 +0530 Message-Id: <20221109080120.19078-4-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221109080120.19078-1-manivannan.sadhasivam@linaro.org> References: <20221109080120.19078-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Qcom CPUFreq hardware (EPSS/OSM) controls clock and voltage to the CPU cores. 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 | 41 +++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 5e0598730a04..c0e4b223f9c1 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -4,6 +4,7 @@ */ #include +#include #include #include #include @@ -54,6 +55,7 @@ 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; @@ -615,8 +617,20 @@ 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); +} + +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; @@ -659,8 +673,15 @@ 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 clk_init = {}; struct resource *res; void __iomem *base; @@ -672,6 +693,26 @@ 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_init.name = devm_kasprintf(dev, GFP_KERNEL, "qcom_cpufreq%d", i); + clk_init.flags = CLK_GET_RATE_NOCACHE; + clk_init.ops = &qcom_cpufreq_hw_clk_ops; + data->cpu_clk.init = &clk_init; + + ret = devm_clk_hw_register(dev, &data->cpu_clk); + if (ret < 0) { + dev_err(dev, "Failed to register Qcom CPUFreq clock(%d)\n", i); + 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);