From patchwork Wed Nov 2 09:08:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 620904 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 0FBBBC433FE for ; Wed, 2 Nov 2022 09:09:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229709AbiKBJJI (ORCPT ); Wed, 2 Nov 2022 05:09:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229676AbiKBJIl (ORCPT ); Wed, 2 Nov 2022 05:08:41 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D74FB21255 for ; Wed, 2 Nov 2022 02:08:38 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id g129so15698972pgc.7 for ; Wed, 02 Nov 2022 02:08:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=HD0bdYs4uYk5v3EHw8KUqVXfFnsjPtpcr4RW87EyNM8=; b=psOLh3CR2Munijk8osqBwWon2rheb999k0sR7fQWluVBKKVs4zYnIBNVqm0o7zBmrW Jb6hMszS7kp5PfuAVaz4w2xRPDMK4n6IVJT3PVa0xaFZ71A+Wq339qVIW3Rg8E2iv3we k77qxRwfP/+h7PRm5AL3004NoD5soLS/IveE6Z6MwnXsaczcF1ZyuqB5hDxaEs3xVk6Q XPMeBPQJDC2rKKLtKm6DRNzrU5aVUlyCnjydsMUFPOjChohdREwQ4yocz8pstzCvVdgt d7OPsNEqV+e9g1LkdrqV5v8YJ7GO8isnVj1axjPbpnrTKklvPvCRWaRzRwNVNeVzOOzD E1dg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=HD0bdYs4uYk5v3EHw8KUqVXfFnsjPtpcr4RW87EyNM8=; b=qsTXkPb7NgewU20VDTQzKM48a9n22sLqEInjQn3N+UznrizbHWd3lFLGeSd7pdfiq8 MmdnDIre6Mc72bsdYT+WV0ulQuZ9jVaktoeLs7ENomoNs6xq/GMomGCN4DoWSXYoX11g Ccp9ObNWCrTq3EVbs95E78jimVvT7IhN4ER3wFdLhGwuuoMEWvYxgO8JsbWQjZc5vb9l KvrlOIv/yAO+fEom9g/xCy3RwolYvvfVzG+BcGbsNA9y4H3DnMNkkUbqh4A7/Ow1zJ82 5oaG1C/jnEZPdm2aXCjCbzWbRYf7aiTvds4FDawhNiVFG9/jV+qe7FjCDCKtAGteGjWV Miog== X-Gm-Message-State: ACrzQf3asDVEs3s5xBCf8uxDR3cTTYYlz7/GQaxvBqimAucZ0XWI9MOT gI9jdg4sR8ffEaqQ6p6BveSd X-Google-Smtp-Source: AMsMyM4WNTqySmX6NVkI0Wj/L6h7nVPA0AUcGX0BpHNKlQUsAVkkgNmAnj59q4LStiF8nqewZM7ViA== X-Received: by 2002:a05:6a00:2402:b0:52c:81cf:8df8 with SMTP id z2-20020a056a00240200b0052c81cf8df8mr24606462pfh.60.1667380118322; Wed, 02 Nov 2022 02:08:38 -0700 (PDT) Received: from localhost.localdomain ([117.193.209.178]) by smtp.gmail.com with ESMTPSA id c12-20020a170902d48c00b0017f36638010sm7856126plg.276.2022.11.02.02.08.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Nov 2022 02:08:37 -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 0/3] qcom-cpufreq-hw: Add CPU clock provider support Date: Wed, 2 Nov 2022 14:38:15 +0530 Message-Id: <20221102090818.65321-1-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hello, This series adds clock provider support to the Qcom CPUFreq driver for supplying the clocks to the CPU cores in Qcom SoCs. The Qualcomm platforms making use of CPUFreq HW Engine (EPSS/OSM) supply clocks to the CPU cores. But this is not represented clearly in devicetree. There is no clock coming out of the CPUFreq HW node to the CPU. This created an issue [1] with the OPP core when a recent enhancement series was submitted. Eventhough the issue got fixed in the OPP framework in the meantime, that's not a proper solution and this series aims to fix it properly. There was also an attempt made by Viresh [2] to fix the issue by moving the clocks supplied to the CPUFreq HW node to the CPU. But that was not accepted since those clocks belong to the CPUFreq HW node only. The proposal here is to add clock provider support to the Qcom CPUFreq HW driver to supply clocks to the CPUs that comes out of the EPSS/OSM block. This correctly reflects the hardware implementation. The clock provider is a simple one that just provides the frequency of the clocks supplied to each frequency domain in the SoC using .recalc_rate() callback. The frequency supplied by the driver will be 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. This series has been tested on SM8450 based dev board with the OPP hack removed and hence there is a DTS change only for that platform. Once this series gets accepted, rest of the platform DTS can also be modified and finally the hack on the OPP core can be dropped. Thanks, Mani [1] https://lore.kernel.org/lkml/YsxSkswzsqgMOc0l@hovoldconsulting.com/ [2] https://lore.kernel.org/lkml/20220801054255.GA12039@thinkpad/t/ Changes in v4: * Rebased on top of cpufreq/arm/linux-next branch Changes in v3: * Submitted the cpufreq driver cleanup patches as a separate series as suggested by Viresh * Removed static keyword from clk_init_data declaration Changes in v2: * Moved the qcom_cpufreq_data allocation to probe * Added single clock provider with multiple clks for each freq domain * Moved soc_data to qcom_cpufreq struct * Added Rob's review for binding Manivannan Sadhasivam (3): dt-bindings: cpufreq: cpufreq-qcom-hw: Add cpufreq clock provider arm64: dts: qcom: sm8450: Supply clock from cpufreq node to CPUs cpufreq: qcom-hw: Add CPU clock provider support .../bindings/cpufreq/cpufreq-qcom-hw.yaml | 12 ++++++ arch/arm64/boot/dts/qcom/sm8450.dtsi | 9 ++++ drivers/cpufreq/qcom-cpufreq-hw.c | 43 +++++++++++++++++++ 3 files changed, 64 insertions(+)