From nobody Thu Apr 9 03:15:10 2026 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 64B53C433FE for ; Wed, 2 Nov 2022 09:09:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230258AbiKBJJO (ORCPT ); Wed, 2 Nov 2022 05:09:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230209AbiKBJIp (ORCPT ); Wed, 2 Nov 2022 05:08:45 -0400 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F2FC2715D for ; Wed, 2 Nov 2022 02:08:44 -0700 (PDT) Received: by mail-pj1-x102c.google.com with SMTP id q1-20020a17090a750100b002139ec1e999so1357040pjk.1 for ; Wed, 02 Nov 2022 02:08:44 -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=qLmIT2EuV7uL5/q+fGUeI0QcACFtgGdUnQVYaLsbI/Y=; b=b7nHLBjUufJmJspBXuHAtSMK8Px+kXryq+x/CMQKjqzJI2+omB03MHFs+b0SIgt+FP ZdI9759K2BCORPFtvXQdMtpc7IxupthgKO/LLlXMIOTEYROvYWiWw0StCpvH/mhM8Mcj YlEvEISlkDng044eoQKPXbhgB97MEu1aDcD6XzEGWn7w5jmthW6qRH7OZKWxKE1CHMmX jtbXxrxI/q/jtp22fzbcXb0FV6V5RQL7cqFeZUvm0cFzE0ojgPwh/lyLrC0KL20rDyv9 i860opxDSZ14AaF2DBg0DXUMUSrnuSYFSHN5AOFPVGBL6wVOXTqsTFXmoTI+ikEv4epo n+Fg== 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=qLmIT2EuV7uL5/q+fGUeI0QcACFtgGdUnQVYaLsbI/Y=; b=vB4W8InefUY2oUca9G2uM9psK6M5PxeeY1nGLNWipzZ5JyQXnXdwPzJs1AGZcPrYE5 RBuNIDjK3FfVLMrsBP0oI8RSuKqglqE4gYsw4Y3GKXKP0y2mdxPMu6Flg55+GTmA1n8H mVIb82dlGAD6jQ+PnNd/JnOi4PCIg3Yb/yjBdFgT/zD5eYCiovQPt98r0OpEVG4xL/BK 5a1YOo8Sm5x4o4Pr/cjNKL46z/sTlKgayYntof+YnLwJWbZxtluiahSEegmU6osm1VJi MWW0rfsE1zi5tahaooGY6oSjvtckCcrq1s799+RLuGdqBqVh3/HyGQhxubJklPZ6exRa eZ3A== X-Gm-Message-State: ACrzQf1GaDiUozGzvE7hLyIENb5VNVFy0MDqHPYx6karOpkJwLJXiRjo Cw1bPKY8dP3kxy80Q4xcDRu5 X-Google-Smtp-Source: AMsMyM77JnAlbEFTQqEbo4jyfDXA5M0vK+5KthBYKkmJ2++rlrrrtMRLZIKj6FZbIvnLIGRIeggJQw== X-Received: by 2002:a17:90a:cb8c:b0:212:eba5:a143 with SMTP id a12-20020a17090acb8c00b00212eba5a143mr24629236pju.79.1667380123644; Wed, 02 Nov 2022 02:08:43 -0700 (PDT) Received: from localhost.localdomain ([117.193.209.178]) by smtp.gmail.com with ESMTPSA id c12-20020a170902d48c00b0017f36638010sm7856126plg.276.2022.11.02.02.08.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Nov 2022 02:08:42 -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 , Rob Herring Subject: [PATCH v4 1/3] dt-bindings: cpufreq: cpufreq-qcom-hw: Add cpufreq clock provider Date: Wed, 2 Nov 2022 14:38:16 +0530 Message-Id: <20221102090818.65321-2-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221102090818.65321-1-manivannan.sadhasivam@linaro.org> References: <20221102090818.65321-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 24fa3d87a40b..9ac8ad5b71b5 100644 --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml @@ -56,6 +56,9 @@ properties: '#freq-domain-cells': const: 1 =20 + '#clock-cells': + const: 1 + required: - compatible - reg @@ -83,6 +86,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_0>; qcom,freq-domain =3D <&cpufreq_hw 0>; + clocks =3D <&cpufreq_hw 0>; L2_0: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -99,6 +103,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_100>; qcom,freq-domain =3D <&cpufreq_hw 0>; + clocks =3D <&cpufreq_hw 0>; L2_100: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -112,6 +117,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_200>; qcom,freq-domain =3D <&cpufreq_hw 0>; + clocks =3D <&cpufreq_hw 0>; L2_200: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -125,6 +131,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_300>; qcom,freq-domain =3D <&cpufreq_hw 0>; + clocks =3D <&cpufreq_hw 0>; L2_300: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -138,6 +145,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_400>; qcom,freq-domain =3D <&cpufreq_hw 1>; + clocks =3D <&cpufreq_hw 1>; L2_400: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -151,6 +159,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_500>; qcom,freq-domain =3D <&cpufreq_hw 1>; + clocks =3D <&cpufreq_hw 1>; L2_500: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -164,6 +173,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_600>; qcom,freq-domain =3D <&cpufreq_hw 1>; + clocks =3D <&cpufreq_hw 1>; L2_600: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -177,6 +187,7 @@ examples: enable-method =3D "psci"; next-level-cache =3D <&L2_700>; qcom,freq-domain =3D <&cpufreq_hw 1>; + clocks =3D <&cpufreq_hw 1>; L2_700: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -197,6 +208,7 @@ examples: clock-names =3D "xo", "alternate"; =20 #freq-domain-cells =3D <1>; + #clock-cells =3D <1>; }; }; ... --=20 2.25.1 From nobody Thu Apr 9 03:15:10 2026 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 A252BC43219 for ; Wed, 2 Nov 2022 09:09:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231298AbiKBJJe (ORCPT ); Wed, 2 Nov 2022 05:09:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230311AbiKBJIv (ORCPT ); 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Wed, 02 Nov 2022 02:08:47 -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 v4 2/3] arm64: dts: qcom: sm8450: Supply clock from cpufreq node to CPUs Date: Wed, 2 Nov 2022 14:38:17 +0530 Message-Id: <20221102090818.65321-3-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221102090818.65321-1-manivannan.sadhasivam@linaro.org> References: <20221102090818.65321-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Qualcomm platforms making use of CPUFreq HW Engine (EPSS/OSM) supply clocks to the CPU cores. 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/qco= m/sm8450.dtsi index d32f08df743d..234d2722a4fa 100644 --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi @@ -51,6 +51,7 @@ CPU0: cpu@0 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 0>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 0>; L2_0: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -70,6 +71,7 @@ CPU1: cpu@100 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 0>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 0>; L2_100: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -86,6 +88,7 @@ CPU2: cpu@200 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 0>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 0>; L2_200: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -102,6 +105,7 @@ CPU3: cpu@300 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 0>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 0>; L2_300: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -118,6 +122,7 @@ CPU4: cpu@400 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 1>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 1>; L2_400: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -134,6 +139,7 @@ CPU5: cpu@500 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 1>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 1>; L2_500: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -151,6 +157,7 @@ CPU6: cpu@600 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 1>; #cooling-cells =3D <2>; + clocks =3D <&cpufreq_hw 1>; L2_600: l2-cache { compatible =3D "cache"; next-level-cache =3D <&L3_0>; @@ -167,6 +174,7 @@ CPU7: cpu@700 { power-domain-names =3D "psci"; qcom,freq-domain =3D <&cpufreq_hw 2>; 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charset="utf-8" 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-cpufr= eq-hw.c index 5e0598730a04..5b5f9a4d1466 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -4,6 +4,7 @@ */ =20 #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; =20 bool per_core_dcvs; =20 @@ -615,8 +617,20 @@ static struct cpufreq_driver cpufreq_qcom_hw_driver = =3D { .ready =3D qcom_cpufreq_ready, }; =20 +static unsigned long qcom_cpufreq_hw_recalc_rate(struct clk_hw *hw, unsign= ed long parent_rate) +{ + struct qcom_cpufreq_data *data =3D container_of(hw, struct qcom_cpufreq_d= ata, cpu_clk); + + return qcom_lmh_get_throttle_freq(data) / HZ_PER_KHZ; +} + +static const struct clk_ops qcom_cpufreq_hw_clk_ops =3D { + .recalc_rate =3D 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 =3D &pdev->dev; struct device *cpu_dev; struct clk *clk; @@ -659,8 +673,16 @@ static int qcom_cpufreq_hw_driver_probe(struct platfor= m_device *pdev) =20 qcom_cpufreq.soc_data =3D of_device_get_match_data(dev); =20 + clk_data =3D devm_kzalloc(dev, struct_size(clk_data, hws, num_domains), G= FP_KERNEL); + if (!clk_data) + return -ENOMEM; + + clk_data->num =3D num_domains; + for (i =3D 0; i < num_domains; i++) { struct qcom_cpufreq_data *data =3D &qcom_cpufreq.data[i]; + struct clk_init_data init =3D {}; + const char *clk_name; struct resource *res; void __iomem *base; =20 @@ -672,6 +694,27 @@ static int qcom_cpufreq_hw_driver_probe(struct platfor= m_device *pdev) =20 data->base =3D base; data->res =3D res; + + /* Register CPU clock for each frequency domain */ + clk_name =3D devm_kasprintf(dev, GFP_KERNEL, "qcom_cpufreq%d", i); + init.name =3D clk_name; + init.flags =3D CLK_GET_RATE_NOCACHE; + init.ops =3D &qcom_cpufreq_hw_clk_ops; + data->cpu_clk.init =3D &init; + + ret =3D 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] =3D &data->cpu_clk; + } + + ret =3D 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; } =20 ret =3D cpufreq_register_driver(&cpufreq_qcom_hw_driver); --=20 2.25.1