From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46589C3A5A4 for ; Mon, 26 Aug 2019 13:44:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28AF3217F5 for ; Mon, 26 Aug 2019 13:44:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731973AbfHZNom (ORCPT ); Mon, 26 Aug 2019 09:44:42 -0400 Received: from inva021.nxp.com ([92.121.34.21]:55548 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731796AbfHZNoi (ORCPT ); Mon, 26 Aug 2019 09:44:38 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 8F0DE200201; Mon, 26 Aug 2019 15:44:36 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 8042620000C; Mon, 26 Aug 2019 15:44:36 +0200 (CEST) Received: from fsr-ub1864-112.ea.freescale.net (fsr-ub1864-112.ea.freescale.net [10.171.82.98]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id E98A220605; Mon, 26 Aug 2019 15:44:35 +0200 (CEST) From: Leonard Crestez To: Chanwoo Choi , MyungJoo Ham Cc: Kyungmin Park , =?UTF-8?q?Artur=20=C5=9Awigo=C5=84?= , Saravana Kannan , Krzysztof Kozlowski , Alexandre Bailon , Georgi Djakov , Abel Vesa , Jacky Bai , Viresh Kumar , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 0/6] PM / devfreq: Add dev_pm_qos support Date: Mon, 26 Aug 2019 16:44:27 +0300 Message-Id: X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add dev_pm_qos notifies to devfreq core in order to support frequency limits via the dev_pm_qos_add_request. Unlike the rest of devfreq the dev_pm_qos frequency is measured in Khz, this is consistent with current dev_pm_qos usage for cpufreq and allows frequencies above 2Ghz (pm_qos expresses limits as s32). Like with cpufreq the handling of min_freq/max_freq is moved to the dev_pm_qos mechanism. Patches 1/2 are technically bugfixes; as far as I can tell the paths that "goto err_devfreq" in devfreq_add_device never worked correctly. Constraints from userspace are no longer clamped on store, instead all values are allowed and we only check against OPPs in a new devfreq_get_freq_range function. This is consistent with the design of dev_pm_qos design. Changes since v3: * Cleanup locking and error-handling in devfreq_add_device * Register notifiers after device registration but before governor start * Keep the initialization of min_req/max_req ahead of device_register because it's used for sysfs handling * Use HZ_PER_KHZ instead of 1000 * Add kernel-doc comments * Move OPP notifier to core Link to v3: https://patchwork.kernel.org/cover/11104061/ Changes since v2: * Handle sysfs via dev_pm_qos (in separate patch) * Add locking to {min,max}_freq_show * Fix checkpatch issues (long lines etc) Link to v2: https://patchwork.kernel.org/patch/11084279/ Changes since v1: * Add doxygen comments for min_nb/max_nb * Remove notifiers on error/cleanup paths. Keep gotos simple by relying on dev_pm_qos_remove_notifier ignoring notifiers which were not added. Link to v1: https://patchwork.kernel.org/patch/11078475/ Leonard Crestez (6): PM / devfreq: Don't take lock in devfreq_add_device PM / devfreq: Add to devfreq_list immediately after registration PM / devfreq: Introduce devfreq_get_freq_range PM / devfreq: Add dev_pm_qos support PM / devfreq: Use dev_pm_qos for sysfs min/max_freq PM / devfreq: Move opp notifier registration to core drivers/devfreq/devfreq.c | 313 +++++++++++++++++++---------------- drivers/devfreq/exynos-bus.c | 7 - drivers/devfreq/rk3399_dmc.c | 6 - include/linux/devfreq.h | 22 ++- 4 files changed, 177 insertions(+), 171 deletions(-) -- 2.17.1