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: Rob X-Patchwork-Id: 5510 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 88DDB23E10 for ; Tue, 6 Dec 2011 04:38:34 +0000 (UTC) Received: from mail-lpp01m010-f52.google.com (mail-lpp01m010-f52.google.com [209.85.215.52]) by fiordland.canonical.com (Postfix) with ESMTP id 671CBA18643 for ; Tue, 6 Dec 2011 04:38:34 +0000 (UTC) Received: by mail-lpp01m010-f52.google.com with SMTP id m6so727409lag.11 for ; Mon, 05 Dec 2011 20:38:34 -0800 (PST) Received: by 10.152.106.115 with SMTP id gt19mr7924801lab.27.1323146313308; Mon, 05 Dec 2011 20:38:33 -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 10.152.41.198 with SMTP id h6cs296313lal; Mon, 5 Dec 2011 20:38:33 -0800 (PST) Received: by 10.224.197.73 with SMTP id ej9mr10573094qab.30.1323146311339; Mon, 05 Dec 2011 20:38:31 -0800 (PST) Received: from mail-qw0-f43.google.com (mail-qw0-f43.google.com [209.85.216.43]) by mx.google.com with ESMTPS id hp8si12279923qab.80.2011.12.05.20.38.30 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 05 Dec 2011 20:38:31 -0800 (PST) Received-SPF: neutral (google.com: 209.85.216.43 is neither permitted nor denied by best guess record for domain of rob.lee@linaro.org) client-ip=209.85.216.43; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.216.43 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-qw0-f43.google.com with SMTP id g27so824241qab.16 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 Cc: 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, amit.kucheria@linaro.org, linux-arm-kernel@lists.infradead.org, patches@linaro.org 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> 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);