From patchwork Tue Dec 6 04:38:11 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Lee X-Patchwork-Id: 129532 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 101C41007D6 for ; Tue, 6 Dec 2011 15:42:14 +1100 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1RXmoQ-0002tN-Hc; Tue, 06 Dec 2011 04:39:26 +0000 Received: from mail-qw0-f42.google.com ([209.85.216.42]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RXmnW-0002hv-53 for linux-arm-kernel@lists.infradead.org; Tue, 06 Dec 2011 04:38:31 +0000 Received: by mail-qw0-f42.google.com with SMTP id j40so1046266qab.15 for ; Mon, 05 Dec 2011 20:38:30 -0800 (PST) Received: by 10.224.72.131 with SMTP id m3mr10328642qaj.97.1323146309920; Mon, 05 Dec 2011 20:38:29 -0800 (PST) Received: from b18647-20 ([23.19.172.17]) by mx.google.com with ESMTPS id fm5sm29806936qab.20.2011.12.05.20.38.28 (version=SSLv3 cipher=OTHER); Mon, 05 Dec 2011 20:38:29 -0800 (PST) From: Robert Lee To: linux@arm.linux.org.uk, s.hauer@pengutronix.de Subject: [RFC PATCH 8/8] ARM: imx: Add mx5 cpuidle implmentation Date: Mon, 5 Dec 2011 22:38:11 -0600 Message-Id: <1323146291-10676-9-git-send-email-rob.lee@linaro.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1323146291-10676-1-git-send-email-rob.lee@linaro.org> References: <1323146291-10676-1-git-send-email-rob.lee@linaro.org> 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 [209.85.216.42 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: khilman@ti.com, kgene.kim@samsung.com, mturquette@linaro.org, patches@linaro.org, nicolas.ferre@atmel.com, daniel.lezcano@linaro.org, magnus.damm@gmail.com, nsekhar@ti.com, amit.kachhap@linaro.org, amit.kucheria@linaro.org, vincent.guittot@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: , MIME-Version: 1.0 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 mx5 cpuidle implmentation based upon the common ARM cpuidle initialization code. Signed-off-by: Robert Lee --- arch/arm/mach-mx5/Makefile | 3 +- arch/arm/mach-mx5/cpuidle.c | 59 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 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..3584df5 --- /dev/null +++ b/arch/arm/mach-mx5/cpuidle.c @@ -0,0 +1,59 @@ +/* + * 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 + +static struct cpuidle_driver imx5_cpuidle_driver = { + .name = "imx5_cpuidle", + .owner = THIS_MODULE, + .states[0] = { + .exit_latency = 12, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "WFI", + .desc = "idle cpu powered, unclocked.", + }, + .states[1] = { + .exit_latency = 20, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "WFI SRPG", + .desc = "idle cpu unpowered, unclocked.", + }, + .state_count = 2, +}; + +int imx5_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + if (likely(index)) + mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF); + else + mx5_cpu_lp_set(WAIT_UNCLOCKED); + cpu_do_idle(); + return index; +} + +static int __init imx5_init_cpuidle(void) +{ + int ret; + + ret = arm_cpuidle_init(&imx5_cpuidle_driver, + imx5_enter_idle, + NULL); + return ret; +} +late_initcall(imx5_init_cpuidle);