From patchwork Tue Aug 20 15:23:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leonard Crestez X-Patchwork-Id: 11104055 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 153ED1395 for ; Tue, 20 Aug 2019 15:24:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F1F4D22CE3 for ; Tue, 20 Aug 2019 15:24:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730036AbfHTPYF (ORCPT ); Tue, 20 Aug 2019 11:24:05 -0400 Received: from inva021.nxp.com ([92.121.34.21]:49934 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727835AbfHTPYF (ORCPT ); Tue, 20 Aug 2019 11:24:05 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 9B9B4200404; Tue, 20 Aug 2019 17:24:03 +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 8D4162002A9; Tue, 20 Aug 2019 17:24:03 +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 023F820612; Tue, 20 Aug 2019 17:24:02 +0200 (CEST) From: Leonard Crestez To: MyungJoo Ham , Kyungmin Park , Chanwoo Choi , =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= Cc: Saravana Kannan , Krzysztof Kozlowski , Alexandre Bailon , Georgi Djakov , Jacky Bai , Viresh Kumar , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 0/2] PM / devfreq: Add dev_pm_qos support Date: Tue, 20 Aug 2019 18:23:59 +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 and this decreases the precision of the sysfs entries. Signed-off-by: Leonard Crestez --- 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 (2): PM / devfreq: Add dev_pm_qos support PM / devfreq: Use dev_pm_qos for sysfs min/max_freq drivers/devfreq/devfreq.c | 170 +++++++++++++++++++++++++++----------- include/linux/devfreq.h | 14 +++- 2 files changed, 131 insertions(+), 53 deletions(-)