From patchwork Fri Mar 28 11:13:30 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory CLEMENT X-Patchwork-Id: 3902101 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 989859F334 for ; Fri, 28 Mar 2014 11:15:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A8367202A7 for ; Fri, 28 Mar 2014 11:15:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC1E720154 for ; Fri, 28 Mar 2014 11:15:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752028AbaC1LOp (ORCPT ); Fri, 28 Mar 2014 07:14:45 -0400 Received: from top.free-electrons.com ([176.31.233.9]:35419 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751656AbaC1LOe (ORCPT ); Fri, 28 Mar 2014 07:14:34 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 522A18A0; Fri, 28 Mar 2014 12:14:36 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (tra42-5-83-152-246-54.fbx.proxad.net [83.152.246.54]) by mail.free-electrons.com (Postfix) with ESMTPSA id 6DDE0ED2; Fri, 28 Mar 2014 12:13:57 +0100 (CET) From: Gregory CLEMENT To: Daniel Lezcano , "Rafael J. Wysocki" , linux-pm@vger.kernel.org, Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , Gregory CLEMENT Cc: Thomas Petazzoni , Ezequiel Garcia , linux-arm-kernel@lists.infradead.org, Lior Amsalem , Tawfik Bayouk , Nadav Haklai , linux-kernel@vger.kernel.org Subject: [PATCH v6 10/11] cpuidle: mvebu: Add initial CPU idle support for Armada 370/XP SoC Date: Fri, 28 Mar 2014 12:13:30 +0100 Message-Id: <1396005211-15573-11-git-send-email-gregory.clement@free-electrons.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1396005211-15573-1-git-send-email-gregory.clement@free-electrons.com> References: <1396005211-15573-1-git-send-email-gregory.clement@free-electrons.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the wfi, cpu idle and cpu deep idle power states support for the Armada XP SoCs. All the latencies and the power consumption values used at the "armada_370_xp_idle_driver" structure are preliminary and will be modified in the future after running some measurements and analysis. Based on the work of Nadav Haklai. Signed-off-by: Nadav Haklai Signed-off-by: Gregory CLEMENT Acked-by: Daniel Lezcano --- drivers/cpuidle/Kconfig.arm | 5 ++ drivers/cpuidle/Makefile | 1 + drivers/cpuidle/cpuidle-armada-370-xp.c | 93 +++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+) create mode 100644 drivers/cpuidle/cpuidle-armada-370-xp.c diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 97ccc31dbdd8..5bb94780d377 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm @@ -1,6 +1,11 @@ # # ARM CPU Idle drivers # +config ARM_ARMADA_370_XP_CPUIDLE + bool "CPU Idle Driver for Armada 370/XP family processors" + depends on ARCH_MVEBU + help + Select this to enable cpuidle on Armada 370/XP processors. config ARM_BIG_LITTLE_CPUIDLE bool "Support for ARM big.LITTLE processors" diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index f71ae1b373c5..9902d052bd87 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o ################################################################################## # ARM SoC drivers +obj-$(CONFIG_ARM_ARMADA_370_XP_CPUIDLE) += cpuidle-armada-370-xp.o obj-$(CONFIG_ARM_BIG_LITTLE_CPUIDLE) += cpuidle-big_little.o obj-$(CONFIG_ARM_HIGHBANK_CPUIDLE) += cpuidle-calxeda.o obj-$(CONFIG_ARM_KIRKWOOD_CPUIDLE) += cpuidle-kirkwood.o diff --git a/drivers/cpuidle/cpuidle-armada-370-xp.c b/drivers/cpuidle/cpuidle-armada-370-xp.c new file mode 100644 index 000000000000..6b98608c222e --- /dev/null +++ b/drivers/cpuidle/cpuidle-armada-370-xp.c @@ -0,0 +1,93 @@ +/* + * Marvell Armada 370 and Armada XP SoC cpuidle driver + * + * Copyright (C) 2013 Marvell + * + * Nadav Haklai + * Gregory CLEMENT + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + * Maintainer: Gregory CLEMENT + */ + +#include +#include +#include +#include +#include +#include +#include + +#define ARMADA_370_XP_MAX_STATES 3 +#define ARMADA_370_XP_FLAG_DEEP_IDLE 0x10000 + +static int (*armada_370_xp_cpu_suspend)(int); + +static int armada_370_xp_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + int ret; + bool deepidle = false; + cpu_pm_enter(); + + if (drv->states[index].flags & ARMADA_370_XP_FLAG_DEEP_IDLE) + deepidle = true; + + ret = armada_370_xp_cpu_suspend(deepidle); + if (ret) + return ret; + + cpu_pm_exit(); + + return index; +} + +static struct cpuidle_driver armada_370_xp_idle_driver = { + .name = "armada_370_xp_idle", + .states[0] = ARM_CPUIDLE_WFI_STATE, + .states[1] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 10, + .power_usage = 50, + .target_residency = 100, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "MV CPU IDLE", + .desc = "CPU power down", + }, + .states[2] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 100, + .power_usage = 5, + .target_residency = 1000, + .flags = CPUIDLE_FLAG_TIME_VALID | + ARMADA_370_XP_FLAG_DEEP_IDLE, + .name = "MV CPU DEEP IDLE", + .desc = "CPU and L2 Fabric power down", + }, + .state_count = ARMADA_370_XP_MAX_STATES, +}; + +static int armada_370_xp_cpuidle_probe(struct platform_device *pdev) +{ + + armada_370_xp_cpu_suspend = (void *)(pdev->dev.platform_data); + return cpuidle_register(&armada_370_xp_idle_driver, NULL); +} + +static struct platform_driver armada_370_xp_cpuidle_plat_driver = { + .driver = { + .name = "cpuidle-armada-370-xp", + .owner = THIS_MODULE, + }, + .probe = armada_370_xp_cpuidle_probe, +}; + +module_platform_driver(armada_370_xp_cpuidle_plat_driver); + +MODULE_AUTHOR("Gregory CLEMENT "); +MODULE_DESCRIPTION("Armada 370/XP cpu idle driver"); +MODULE_LICENSE("GPL");