From patchwork Thu Nov 17 05:31:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 625531 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 D7D60C4332F for ; Thu, 17 Nov 2022 05:32:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239160AbiKQFcR (ORCPT ); Thu, 17 Nov 2022 00:32:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238783AbiKQFcN (ORCPT ); Thu, 17 Nov 2022 00:32:13 -0500 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E9805BD60 for ; Wed, 16 Nov 2022 21:32:10 -0800 (PST) Received: by mail-pl1-x630.google.com with SMTP id j12so624541plj.5 for ; Wed, 16 Nov 2022 21:32:10 -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=4OvsIbRKjLs7ZX9h1wlc3YCPycyX8ACIte6CDckfX6U=; b=BGyW9bWVtdS5mgE3nioOqgLfTm7+DHwgyeTpo9L9qsBEO6dKaPKCgo/Ig1VwqrGrPv K5NIJDOMx1Hzb1pWHMIx5mXDUPyIlxFpDGl2sF5RSQSV3QHzQAlswolZUrnAxhgCJXUp 56DNxzLShqfz/5xcKzgZl6psOoflOrZZ1m1KhncJVCtJos2k/20YD/4SN4l8N6cA0Zd3 EVGOBcSCagsTCLtJ89CgljI+kbrwFjQjJJVWklnHWjFy+LC9+9xHOgxnDXEVG1dA8uQd LM4cK0MCtMr7ySTjD1UVQSzmQSfBR2SEwCYJkPxGGQhkOIs5U93000lP4N8LI99X2XzC Hyhg== 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=4OvsIbRKjLs7ZX9h1wlc3YCPycyX8ACIte6CDckfX6U=; b=1+976MoXggSr+4CXq3x5QZAPP1mrRbDyF/z3Ak6GE9N2YAxXP0REn96/rv3acSneK9 IgSU5oOsqQEwF3BBTYoj+MkPz+20QeBwkRyaJ6y/ethZhF+ztdmr8+g2r22vixx9Adm5 08B5qk5VxYN/x9JwIXszhkIuvNGeJoLDhGxILQf7gH04Y3sswo4bjbtrJvrMNOx7zpWM yX9t80pYf63M8tJ/r6JvA/tls+WjCS88I3pRkG6pCkwKyhRZES/4k7/ET2cI96OAFCBB 50z+RXl9kfNwW7Vnon3SVlSxp7LfdxfAFAhYNDarhKReJLG4SBF4maMM6WYhWExkpMSk cwTA== X-Gm-Message-State: ANoB5plup4CV0RBQ+v74N3GPEWMJLGX8TEhfSXggDe4G9jeZ+acvIEEq 5APbGomoHbyiKNy9RIVVKyoK X-Google-Smtp-Source: AA0mqf5AilcpDgWcYGXfrJIQufqZd9/IoWsAyMTrH6188RIZlil1KxKNZdQKQlwPg0lwITx0IFFv3Q== X-Received: by 2002:a17:90a:dd83:b0:218:61bd:d00d with SMTP id l3-20020a17090add8300b0021861bdd00dmr4554709pjv.236.1668663129783; Wed, 16 Nov 2022 21:32:09 -0800 (PST) Received: from localhost.localdomain ([117.193.208.31]) by smtp.gmail.com with ESMTPSA id q4-20020a17090311c400b001865c298588sm96600plh.258.2022.11.16.21.32.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Nov 2022 21:32:08 -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 v7 3/4] cpufreq: qcom-hw: Add CPU clock provider support Date: Thu, 17 Nov 2022 11:01:44 +0530 Message-Id: <20221117053145.10409-4-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221117053145.10409-1-manivannan.sadhasivam@linaro.org> References: <20221117053145.10409-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 | 45 +++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 5e0598730a04..1faa325d3e52 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 +693,30 @@ 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 = kasprintf(GFP_KERNEL, "qcom_cpufreq%d", i); + if (!clk_init.name) + return -ENOMEM; + + 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 clock %d: %d\n", i, ret); + return ret; + } + + clk_data->hws[i] = &data->cpu_clk; + kfree(clk_init.name); + } + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data); + if (ret < 0) { + dev_err(dev, "Failed to add clock provider\n"); + return ret; } ret = cpufreq_register_driver(&cpufreq_qcom_hw_driver);