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: 621507 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 EED5AC4332F for ; Wed, 2 Nov 2022 08:38:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231140AbiKBIid (ORCPT ); Wed, 2 Nov 2022 04:38:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45160 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230505AbiKBIi3 (ORCPT ); Wed, 2 Nov 2022 04:38:29 -0400 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4BA827B19 for ; Wed, 2 Nov 2022 01:38:23 -0700 (PDT) Received: by mail-pg1-x52d.google.com with SMTP id r18so15605226pgr.12 for ; Wed, 02 Nov 2022 01:38:23 -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=0dhoFn1ZtCyAs/+qCp2eCTiNCa1Q3Al3mgUmbiNZfxI=; b=UWRy0RPpNm7wlerLKGEhAZXzXLeA8etRLack1Pq/khiT5F466cWJeQQvGYdXYFdixO uiygCzzZwkiAi1s1mrxuUEuwfVNO6qq8nkCF43i+stFxMWFXGp8ZnVypP0HFl/SEh/Ef STHgrvN7SRvthn555mrWqdlSjzQOrSx+wo2FeOFrOPyad8sjCoWzN0wkMUZkHFH/XeL2 vrfbzKNq3P/RC9Uje5+pjZ6ISGo5C5NpJgTD/DgKl/Qz4HCjwsbyhGIxFktnbrAMF5hK 4XKI/fX8bFG6I3jAbV13HHCcIqdte6ScTkcedLDj3pBkQdbVnorjzjAhcBRo/0JWZ40o PgTg== 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=0dhoFn1ZtCyAs/+qCp2eCTiNCa1Q3Al3mgUmbiNZfxI=; b=V63gA1BQ/OX0BbG06LgTA4aB1R2RGjP5sQG/qCuym5GOB/tyrSW7G9E7C5eHWSXhWH fAQmTn3k8eqEq/ZuNI0peMHUyyAXDOppJYtwAG9yaWdMIM0nBXUGVFdJAV/aEO8JJZT6 D6NyDL7ilHGSINM7HL7vfxTs1IS5v8xSyhg3flUFjygyzutTMdt9Imrh9ERxVGL57Bb1 1TxqR0PYR7i7FUCFMjShl7egETSlOGrsqgbv0c39Cq0gdOJV5a9QeykelKY2cOax0s/9 S4j+mMeBs70YSsJovJdOwtUBaJt+H01HjDjva5G8eITHh0MrTg5YwI4BK67GBKlEBZiV xquw== X-Gm-Message-State: ACrzQf22AYoXfyNo6lvclsbnO4pnyv6c6Dt7D4Z/rM+tunp3Ak3D0TQa jlF0MuP79AiC+PvlFBN77HTI X-Google-Smtp-Source: AMsMyM5bOfAILnTTDp4H4LLMEeXBSxnsGtZCnI32rlTDQ9LMkVksrCprUFCbuCQ3SKrULvt1UPd2mw== X-Received: by 2002:a63:2a8b:0:b0:46e:9fda:2171 with SMTP id q133-20020a632a8b000000b0046e9fda2171mr20798235pgq.106.1667378303216; Wed, 02 Nov 2022 01:38:23 -0700 (PDT) Received: from localhost.localdomain ([117.193.209.178]) by smtp.gmail.com with ESMTPSA id x19-20020aa79573000000b0056bcb102e7bsm7887770pfq.68.2022.11.02.01.38.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Nov 2022 01:38:22 -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 v3 3/3] cpufreq: qcom-hw: Add CPU clock provider support Date: Wed, 2 Nov 2022 14:07:51 +0530 Message-Id: <20221102083751.56330-4-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 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 | 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);