From patchwork Tue Jan 24 04:37:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Lee X-Patchwork-Id: 137506 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:4978:20e::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 178DEB6F13 for ; Tue, 24 Jan 2012 15:42:15 +1100 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1RpYA5-0004sL-No; Tue, 24 Jan 2012 04:39:14 +0000 Received: from mail-gy0-f177.google.com ([209.85.160.177]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RpY8o-0004UI-Vw for linux-arm-kernel@lists.infradead.org; Tue, 24 Jan 2012 04:37:55 +0000 Received: by mail-gy0-f177.google.com with SMTP id z22so62399ghb.36 for ; Mon, 23 Jan 2012 20:37:54 -0800 (PST) MIME-Version: 1.0 Received: by 10.236.73.129 with SMTP id v1mr15744615yhd.129.1327379872976; Mon, 23 Jan 2012 20:37:52 -0800 (PST) Received: from b18647-20 ([23.19.172.97]) by mx.google.com with ESMTPS id h29sm14021831ann.16.2012.01.23.20.37.51 (version=SSLv3 cipher=OTHER); Mon, 23 Jan 2012 20:37:52 -0800 (PST) From: Robert Lee To: len.brown@intel.com, linux-pm@vger.kernel.org, s.hauer@pengutronix.de, amit.kucheria@linaro.org Subject: [PATCH v3 7/7] ARM: imx: Add imx5 cpuidle implementation Date: Mon, 23 Jan 2012 22:37:34 -0600 Message-Id: <1327379854-12403-8-git-send-email-rob.lee@linaro.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1327379854-12403-1-git-send-email-rob.lee@linaro.org> References: <1327379854-12403-1-git-send-email-rob.lee@linaro.org> X-Gm-Message-State: ALoCoQmoLCzH8odmIik2suSS87AUwmg3vHZwrwjzqLCVX2O57wmzVYoUP26koCEKmC+3LiqH1mBL X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.160.177 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: khilman@ti.com, deepthi@linux.vnet.ibm.com, kgene.kim@samsung.com, linux@arm.linux.org.uk, patches@linaro.org, magnus.damm@gmail.com, daniel.lezcano@linaro.org, nicolas.ferre@atmel.com, nsekhar@ti.com, vincent.guittot@linaro.org, amit.kachhap@linaro.org, nicolas.pitre@linaro.org, broonie@opensource.wolfsonmicro.com, mturquette@linaro.org, arnd.bergmann@linaro.org, linux@maxim.org.za, shawn.guo@freescale.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org Add imx5 cpuidle implementation using common cpuidle functionality. Signed-off-by: Robert Lee --- arch/arm/mach-mx5/Makefile | 3 +- arch/arm/mach-mx5/cpuidle.c | 64 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-mx5/cpuidle.c diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile index 0fc6080..2c348b4 100644 --- a/arch/arm/mach-mx5/Makefile +++ b/arch/arm/mach-mx5/Makefile @@ -3,8 +3,9 @@ # # Object file lists. -obj-y := cpu.o mm.o clock-mx51-mx53.o ehci.o system.o +obj-y := cpu.o mm.o clock-mx51-mx53.o ehci.o system.o +obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_PM) += pm-imx5.o obj-$(CONFIG_CPU_FREQ_IMX) += cpu_op-mx51.o obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o diff --git a/arch/arm/mach-mx5/cpuidle.c b/arch/arm/mach-mx5/cpuidle.c new file mode 100644 index 0000000..230d335 --- /dev/null +++ b/arch/arm/mach-mx5/cpuidle.c @@ -0,0 +1,64 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * Copyright 2011 Linaro Ltd. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include +#include +#include +#include +#include +#include + +int imx5_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + mx5_cpu_lp_set((unsigned int)dev->states_usage[index].driver_data); + cpu_do_idle(); + return index; +} + +static struct cpuidle_driver imx5_cpuidle_driver __initdata = { + .name = "imx5_cpuidle", + .owner = THIS_MODULE, + .states[0] = { + .enter = imx5_enter, + .exit_latency = 12, /* max latency at 160MHz */ + .target_residency = 1, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "IMX WFI", + .desc = "CPU and related clocks gated", + }, + .states[1] = { + .enter = imx5_enter, + .exit_latency = 20, /* max latency at 160MHz */ + .target_residency = 1, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "IMX SRPG", + .desc = "CPU state retained,powered off", + }, + .state_count = 2, +}; + +/* use driver_data field to hold the mx5 idle parameter */ +static void __init imx5_dd_init(struct cpuidle_device * dev) +{ + dev->states_usage[0].driver_data = (void *)WAIT_UNCLOCKED; + dev->states_usage[1].driver_data = (void *)WAIT_UNCLOCKED_POWER_OFF; +} + +static int __init imx5_init_cpuidle(void) +{ + return common_cpuidle_init(&imx5_cpuidle_driver, + true, + imx5_dd_init); +} +late_initcall(imx5_init_cpuidle);