From patchwork Fri Sep 21 15:11:57 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajagopal Venkat X-Patchwork-Id: 1491961 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id A0127DF28C for ; Fri, 21 Sep 2012 15:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756223Ab2IUPUM (ORCPT ); Fri, 21 Sep 2012 11:20:12 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:46630 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756222Ab2IUPUL (ORCPT ); Fri, 21 Sep 2012 11:20:11 -0400 Received: by pbbrr4 with SMTP id rr4so2840496pbb.19 for ; Fri, 21 Sep 2012 08:20:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=dM1N/2Ic26omjCIYsgOTc63fPMdU9zM9FV07iefaDIQ=; b=H4GlgfsymcOtToe1+8n62hCvVqluYKdGtQ86vCYTxf5Of5yK0gVPNJdTjo7pgXTf3d I89JwwDK0dk1oi3OJQtD8zynrI2cKpA5ot9KJAB2gQv0aX/cjUX4mB+GnI6HCmY+ggAn 7mkv3o8frXJhdcGkyRR86MpS9Wv7X6nlqzGlHGVwfj3Ed5W2jtDFAdJKcm80u6qUGjV7 6FurEuuKNCBNILE4KH9ROuwMgUTRn2bV/ZTO1CdIxpLo7TYViZ8LG+oki4cfcD6JW7Sh h7duW8zf6gdbWa5iwvt4WB+eD1Tk6thWU+/+OAgl9TOQ0iC/R+K872xG1iUGyx6tUvX0 zR+A== Received: by 10.68.218.72 with SMTP id pe8mr16681114pbc.33.1348240451270; Fri, 21 Sep 2012 08:14:11 -0700 (PDT) Received: from localhost.localdomain ([101.62.22.184]) by mx.google.com with ESMTPS id wn4sm5257991pbc.55.2012.09.21.08.14.05 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 21 Sep 2012 08:14:10 -0700 (PDT) From: Rajagopal Venkat To: mturquette@linaro.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, rjw@sisk.pl Cc: patches@linaro.org, linaro-dev@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Rajagopal Venkat Subject: [PATCH v3 2/3] devfreq: Add suspend and resume apis Date: Fri, 21 Sep 2012 20:41:57 +0530 Message-Id: <1348240318-2967-3-git-send-email-rajagopal.venkat@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1348240318-2967-1-git-send-email-rajagopal.venkat@linaro.org> References: <1348240318-2967-1-git-send-email-rajagopal.venkat@linaro.org> X-Gm-Message-State: ALoCoQm9/FLkWxNAxslqXgWLAQjumxc/HhWZ4bg43Y2ICEVRK82fYjUYD83FSmUJ4qD1nNQVMblg Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add devfreq suspend/resume apis for devfreq users. This patch supports suspend and resume of devfreq load monitoring, required for devices which can idle. Signed-off-by: Rajagopal Venkat --- drivers/devfreq/devfreq.c | 28 ++++++++++++++++++++++++++++ drivers/devfreq/governor.h | 2 ++ drivers/devfreq/governor_simpleondemand.c | 9 +++++++++ include/linux/devfreq.h | 12 ++++++++++++ 4 files changed, 51 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 8e9b5aa..edddb9e 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -416,6 +416,34 @@ int devfreq_remove_device(struct devfreq *devfreq) } EXPORT_SYMBOL(devfreq_remove_device); +/** + * devfreq_suspend_device() - Suspend devfreq of a device. + * @devfreq the devfreq instance to be suspended + */ +int devfreq_suspend_device(struct devfreq *devfreq) +{ + if (!devfreq) + return -EINVAL; + + return devfreq->governor->event_handler(devfreq, + DEVFREQ_GOV_SUSPEND, NULL); +} +EXPORT_SYMBOL(devfreq_suspend_device); + +/** + * devfreq_resume_device() - Resume devfreq of a device. + * @devfreq the devfreq instance to be resumed + */ +int devfreq_resume_device(struct devfreq *devfreq) +{ + if (!devfreq) + return -EINVAL; + + return devfreq->governor->event_handler(devfreq, + DEVFREQ_GOV_RESUME, NULL); +} +EXPORT_SYMBOL(devfreq_resume_device); + static ssize_t show_governor(struct device *dev, struct device_attribute *attr, char *buf) { diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h index bb3aff3..26432ac 100644 --- a/drivers/devfreq/governor.h +++ b/drivers/devfreq/governor.h @@ -22,6 +22,8 @@ #define DEVFREQ_GOV_START 0x1 #define DEVFREQ_GOV_STOP 0x2 #define DEVFREQ_GOV_INTERVAL 0x3 +#define DEVFREQ_GOV_SUSPEND 0x4 +#define DEVFREQ_GOV_RESUME 0x5 /* Caution: devfreq->lock must be locked before calling update_devfreq */ extern int update_devfreq(struct devfreq *devfreq); diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c index cf94218..a8ba78c 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -104,6 +104,15 @@ int devfreq_simple_ondemand_handler(struct devfreq *devfreq, case DEVFREQ_GOV_INTERVAL: devfreq_interval_update(devfreq, (unsigned int *)data); break; + + case DEVFREQ_GOV_SUSPEND: + devfreq_monitor_suspend(devfreq); + break; + + case DEVFREQ_GOV_RESUME: + devfreq_monitor_resume(devfreq); + break; + default: break; } diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 2ab70e3..18bd3b7 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -158,6 +158,8 @@ extern struct devfreq *devfreq_add_device(struct device *dev, const struct devfreq_governor *governor, void *data); extern int devfreq_remove_device(struct devfreq *devfreq); +extern int devfreq_suspend_device(struct devfreq *devfreq); +extern int devfreq_resume_device(struct devfreq *devfreq); /* Helper functions for devfreq user device driver with OPP. */ extern struct opp *devfreq_recommended_opp(struct device *dev, @@ -211,6 +213,16 @@ static int devfreq_remove_device(struct devfreq *devfreq) return 0; } +static int devfreq_suspend_device(struct devfreq *devfreq) +{ + return 0; +} + +static int devfreq_resume_device(struct devfreq *devfreq) +{ + return 0; +} + static struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq, u32 flags) {