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,URIBL_BLOCKED,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 8B000C7618B for ; Wed, 24 Jul 2019 12:38:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AD2B229ED for ; Wed, 24 Jul 2019 12:38:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726001AbfGXMiw (ORCPT ); Wed, 24 Jul 2019 08:38:52 -0400 Received: from inva020.nxp.com ([92.121.34.13]:51490 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725826AbfGXMiw (ORCPT ); Wed, 24 Jul 2019 08:38:52 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 3BC6D1A01FD; Wed, 24 Jul 2019 14:38:51 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 2D2CB1A0148; Wed, 24 Jul 2019 14:38:51 +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 ED221205D8; Wed, 24 Jul 2019 14:38:49 +0200 (CEST) From: Leonard Crestez To: MyungJoo Ham , Kyungmin Park , Will Deacon , Stephen Boyd Cc: Michael Turquette , Jacky Bai , Anson Huang , Abel Vesa , Dong Aisheng , Viresh Kumar , Georgi Djakov , Alexandre Bailon , Chanwoo Choi , Mark Rutland , Frank Li , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RFCv2 0/3] PM / devfreq: Add imx driver Date: Wed, 24 Jul 2019 15:38:43 +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 This series attempts to add devfreq support for imx8mm, covering dynamic scaling of internal buses and dram. Actual scaling is performed through the clk framework: The NOC and main NICs are driven by composite clks and a new 'imx8m-dram' clk is used for scaling dram using firmware calls. Frequency target is set via "clk_set_min_rate", this allows an unrelated subsystem (for example interconnect) to also request minimum rates as a form for proactive scaling. The dram controller (DDRC) has a performance monitoring block attached for which a perf driver already exists. Instead of reimplementing that as devfreq-events the perf in-kernel API is used. Changes since v2: * Solve review comments * Add yaml binding doc * Add perf event support Link to v2: https://patchwork.kernel.org/patch/11021571/ DRAM frequency switching through clk framework is here: * https://patchwork.kernel.org/patch/11049429/ That part might not be accepted in clk and it might have to be moved to devfreq also. Leonard Crestez (3): dt-bindings: devfreq: Add initial bindings for i.MX PM / devfreq: Add imx driver PM / devfreq: Add imx perf event support .../devicetree/bindings/devfreq/imx.yaml | 59 ++++ drivers/devfreq/Kconfig | 10 + drivers/devfreq/Makefile | 1 + drivers/devfreq/imx-devfreq.c | 278 ++++++++++++++++++ 4 files changed, 348 insertions(+) create mode 100644 Documentation/devicetree/bindings/devfreq/imx.yaml create mode 100644 drivers/devfreq/imx-devfreq.c -- 2.17.1