From patchwork Fri Aug 21 14:00:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 11729535 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E07C016B1 for ; Fri, 21 Aug 2020 14:00:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C2C0320658 for ; Fri, 21 Aug 2020 14:00:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tp9Nu4RN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728633AbgHUOAm (ORCPT ); Fri, 21 Aug 2020 10:00:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728236AbgHUOAk (ORCPT ); Fri, 21 Aug 2020 10:00:40 -0400 Received: from mail-ed1-x544.google.com (mail-ed1-x544.google.com [IPv6:2a00:1450:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C72E7C061573; Fri, 21 Aug 2020 07:00:39 -0700 (PDT) Received: by mail-ed1-x544.google.com with SMTP id b2so1506400edw.5; Fri, 21 Aug 2020 07:00:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=nt1Kd98grCASJIUWWiWXpg+ScuiPaXDgXJdNYD47wWE=; b=tp9Nu4RNWrkklFOwMk18vBYIyTEHFyTZEyVFlr8zKr/VPtCIVHGqOIxlE7hs9ei1Js buboWgyI8TVqd5OrwLyLlaPmkqgnpDIfI/yG2QQ/LpA+0jA2CYES4U31Ly1VQiKNQVkS 73vgs8cM2w46WdvrfuzVk4HRakgQaVYoTj5uXeLTP04r8663O/Am5OD5f75kgd8jM/pe ImUwNdA9mRH8HjrXydueV9ox3/bSgyTLnY7VjYLxAFiTdN6R4GxV1HQBP8HHO1/mr2Eg 2EGhDDNldjLY+l1nG+3NLRnnKhcXYn8A1ABZA0WchTRe0nXn0wCFYndqX+rOSop/ke7T D3+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=nt1Kd98grCASJIUWWiWXpg+ScuiPaXDgXJdNYD47wWE=; b=YxcyjeWOwU2iROiTZ+z5yhfZme6/kOrdBho4lFeD13dWg3g+Y8I3RHu3eux0AuzZEW G5mvyAUTV+1wqRlgAjikwsjXE4sUKNFWStO1iburg7LPFaux6UUfn49ASCsWI0Ni6TmK ZMYZZpokkIO325uBYfEUTCZN73DG6+1tJMKpn/yjijwBibj3s3B0J7Aeue8CAa2aKsqg smLoXgEZdNLivian6qZushqNyviaHeILAC1x8O5rInNVaIGXJ/6Gc/Zf+hc+GO9Bzmf4 tc33su452GrV+0z0osuKZpnZxs/z23VO5anXb/GP8YB/TVL9y2l7lZlrBSCmsMlgtgv0 748A== X-Gm-Message-State: AOAM531m3Rsif6XRwcKULt/bsU/AlG7wKN2pjkBIZPmmhcApogAgATEu kTxxjFntjMWgwVcgWLLt3F0= X-Google-Smtp-Source: ABdhPJwXWlhQMaNkBZ5lWOMS4F3g51moSS6ZPdFXV4Y2pPsLgA6kKM9kus4ugPjIzamA0wGCA/1Dzg== X-Received: by 2002:a05:6402:17cc:: with SMTP id s12mr1005802edy.293.1598018437105; Fri, 21 Aug 2020 07:00:37 -0700 (PDT) Received: from Ansuel-XPS.localdomain (host-87-10-16-66.retail.telecomitalia.it. [87.10.16.66]) by smtp.googlemail.com with ESMTPSA id c7sm1152969edf.1.2020.08.21.07.00.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Aug 2020 07:00:36 -0700 (PDT) From: Ansuel Smith To: Sudeep Holla Cc: Ansuel Smith , "Rafael J. Wysocki" , Viresh Kumar , Rob Herring , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v3 0/2] Add Krait Cache Scaling support Date: Fri, 21 Aug 2020 16:00:19 +0200 Message-Id: <20200821140026.19643-1-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This adds Krait Cache scaling support using the cpufreq notifier. I have some doubt about where this should be actually placed (clk or cpufreq)? Also the original idea was to create a dedicated cpufreq driver (like it's done in the codeaurora qcom repo) by copying the cpufreq-dt driver and adding the cache scaling logic but i still don't know what is better. Have a very similar driver or add a dedicated driver only for the cache using the cpufreq notifier and do the scale on every freq transition. Thanks to everyone who will review or answer these questions. v3: * Use opp infrastructure * Update documentation v2: * Fix Documentation error reported by bot * Rework code to fail probe on missing required params * Optimize notifier callback to reduce CPU cycle Ansuel Smith (2): cpufreq: qcom: Add Krait Cache Scaling support dt-bindings: cpufreq: Document Krait CPU Cache scaling .../bindings/cpufreq/krait-cache-scale.yaml | 79 ++++++ drivers/cpufreq/Kconfig.arm | 9 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/krait-cache.c | 232 ++++++++++++++++++ 4 files changed, 321 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/krait-cache-scale.yaml create mode 100644 drivers/cpufreq/krait-cache.c