From patchwork Tue Oct 25 07:32:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 618415 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 EC97FFA3743 for ; Tue, 25 Oct 2022 07:34:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230149AbiJYHeW (ORCPT ); Tue, 25 Oct 2022 03:34:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231907AbiJYHeF (ORCPT ); Tue, 25 Oct 2022 03:34:05 -0400 Received: from mail-pj1-x1042.google.com (mail-pj1-x1042.google.com [IPv6:2607:f8b0:4864:20::1042]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7519152018 for ; Tue, 25 Oct 2022 00:33:44 -0700 (PDT) Received: by mail-pj1-x1042.google.com with SMTP id l6so6416756pjj.0 for ; Tue, 25 Oct 2022 00:33:44 -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=XNFZLWBDpEQVVP8PITjRVb+C8Kzi0WYhsCO8eonBgh0=; b=QsWpwnJULajs9HDqiZmXgkvTZGZkYUVcrZ3B7G7duiqEitktj9vkDQ/g75wHP7rLUf Y3LQKXcUxrmrcTzZApvHSGRd8WDKxJl9BFS9YeQiQcopN147yzmCmsbwfVwQ74Cuf4L2 t6CsM7bnebtyY0C+qYldRH6J+y7Ie3OM/phjKEuQ8PpE2kMUEcwqpwEvi8QWsVca1d9F qeqMrcfJHFDjWyDBS6zLxeUfs4BG+K7Jx85MsYbjBWRCwUhEvznPHZtGZrkNkeITMnsP MZAph4ZsdQmxqbeYbzw4waTcN8bE5p+L9Bexg9B2yhAH0liE2Mh33RrsCYUIVpwE8XQM N0AQ== 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=XNFZLWBDpEQVVP8PITjRVb+C8Kzi0WYhsCO8eonBgh0=; b=bZPWmrBHOPg7Gj2eGsyLfDjqL7Gz8LntQMfvsF9SCbt3Qxo1vcQ00KHTgmUbdqHL3Q 5ygdxf6zXpCPhRLxNZrFpVBRzWKsHcQ4KamXNCdxXJwWZSuSP6xbDaeGqq0Qg8aQyzYX CblZsptK3K/kJu38WpMV1/WUt3SnbpkU5VQ128jZwoRca72p4d8fQis6F3axxJ8R0PUD tml5zE+OPDjye/vpfN88jc/zXu6hZwEJ7X3s2iA/lbV2018e8hW/qxBOBXAfyktRczgP KSLrwj0nxjyhmxJN1BsKSDNcZbmyY9GC+k3UvCGIYvU8LiLHi6lnJP5hB9mtzYXk65Wz WLoQ== X-Gm-Message-State: ACrzQf0TJZn8LXL5qNrMG4hbph5E14tJWnf0KOelMarJ/7RcQP+tyO6p wZslErlU2Aw3cLQllcj8RYP7 X-Google-Smtp-Source: AMsMyM6+ep5OX6LFLnBIpKwOJqjTdnabuv3UlmkbhDRgTYaCRuGzjWjDmrmMeJFhb7UIoHNASgukig== X-Received: by 2002:a17:902:ce09:b0:178:bb78:49a5 with SMTP id k9-20020a170902ce0900b00178bb7849a5mr37984224plg.100.1666683223934; Tue, 25 Oct 2022 00:33:43 -0700 (PDT) Received: from localhost.localdomain ([117.193.211.146]) by smtp.gmail.com with ESMTPSA id c1-20020a17090a4d0100b0020dda7efe61sm5048369pjg.5.2022.10.25.00.33.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Oct 2022 00:33:42 -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 Subject: [PATCH v2 7/7] cpufreq: qcom-hw: Add CPU clock provider support Date: Tue, 25 Oct 2022 13:02:54 +0530 Message-Id: <20221025073254.1564622-8-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221025073254.1564622-1-manivannan.sadhasivam@linaro.org> References: <20221025073254.1564622-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@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 | 43 +++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 76f840636828..66677db3e267 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]; + static 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);