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: Rob X-Patchwork-Id: 6363 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 9BF4723E0E for ; Tue, 24 Jan 2012 04:37:58 +0000 (UTC) Received: from mail-bk0-f52.google.com (mail-bk0-f52.google.com [209.85.214.52]) by fiordland.canonical.com (Postfix) with ESMTP id 857B8A180D2 for ; Tue, 24 Jan 2012 04:37:58 +0000 (UTC) Received: by mail-bk0-f52.google.com with SMTP id r19so3637941bka.11 for ; Mon, 23 Jan 2012 20:37:58 -0800 (PST) Received: by 10.204.10.82 with SMTP id o18mr4338641bko.20.1327379878341; Mon, 23 Jan 2012 20:37:58 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.204.130.220 with SMTP id u28cs90843bks; Mon, 23 Jan 2012 20:37:58 -0800 (PST) Received: by 10.236.146.4 with SMTP id q4mr15191637yhj.105.1327379876468; Mon, 23 Jan 2012 20:37:56 -0800 (PST) Received: from mail-yx0-f178.google.com (mail-yx0-f178.google.com [209.85.213.178]) by mx.google.com with ESMTPS id n61si15163405yhk.119.2012.01.23.20.37.54 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 23 Jan 2012 20:37:56 -0800 (PST) Received-SPF: neutral (google.com: 209.85.213.178 is neither permitted nor denied by best guess record for domain of rob.lee@linaro.org) client-ip=209.85.213.178; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.213.178 is neither permitted nor denied by best guess record for domain of rob.lee@linaro.org) smtp.mail=rob.lee@linaro.org Received: by mail-yx0-f178.google.com with SMTP id m12so1774605yen.37 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 Cc: linux@arm.linux.org.uk, shawn.guo@freescale.com, nicolas.ferre@atmel.com, linux@maxim.org.za, kgene.kim@samsung.com, amit.kachhap@linaro.org, magnus.damm@gmail.com, khilman@ti.com, nsekhar@ti.com, daniel.lezcano@linaro.org, mturquette@linaro.org, vincent.guittot@linaro.org, arnd.bergmann@linaro.org, linux-arm-kernel@lists.infradead.org, patches@linaro.org, deepthi@linux.vnet.ibm.com, broonie@opensource.wolfsonmicro.com, nicolas.pitre@linaro.org, robherring2@gmail.com 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: ALoCoQm3/MUSnzZcGTkvODG8URZpVa36//F3j8a1OPbW0fz595ObXBYI/Y2qGx5LNcWKYnHJh1nA 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);