From patchwork Thu Sep 13 13:55:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajagopal Venkat X-Patchwork-Id: 1452651 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 BC9A0DF24C for ; Thu, 13 Sep 2012 13:58:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755208Ab2IMN6i (ORCPT ); Thu, 13 Sep 2012 09:58:38 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:34264 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754743Ab2IMN6f (ORCPT ); Thu, 13 Sep 2012 09:58:35 -0400 Received: by mail-pb0-f46.google.com with SMTP id rr13so3988385pbb.19 for ; Thu, 13 Sep 2012 06:58:35 -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=/P1iqRAjokVuMl92TN6BzLql9rH/QYsceGCmdJklGKw=; b=IAr0jp+RA1ahtkDXPMHjUk1+OL0Neb6OiNuGNvgndko77vgxBxqyUyN6tXr30qaX11 BEG4svCUpoeGm/0QlJjmPlopl5jndwvVFOAOl/YlFth30GTa0S3bGIHinx5O9e/kA8Yv FwrLZLtwV9i5t3epb1D3R7QRmIuUAzCtj2xTSKq2TBQNt7qYdddUpz1HUbWJnNQcohjD mRCj3TeXoI7/BopeRnLNv5NwzYR2L5LSRs855gZZ0qubbh+wqPutS1K8QbCJ6i9C4pYJ l+ViQv6pzxVrwBpSH8UPzUI8dBe+6HIkYaiewD8a8cSNpK8ETh8hE1GnLFtaJnSRbnrl bY5w== Received: by 10.68.197.194 with SMTP id iw2mr4793701pbc.121.1347544715427; Thu, 13 Sep 2012 06:58:35 -0700 (PDT) Received: from localhost.localdomain ([115.242.164.208]) by mx.google.com with ESMTPS id gh7sm13126777pbc.29.2012.09.13.06.58.30 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 13 Sep 2012 06:58:34 -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 v2 2/3] devfreq: Add suspend and resume apis Date: Thu, 13 Sep 2012 19:25:34 +0530 Message-Id: <1347544535-2772-3-git-send-email-rajagopal.venkat@linaro.org> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1347544535-2772-1-git-send-email-rajagopal.venkat@linaro.org> References: <1347544535-2772-1-git-send-email-rajagopal.venkat@linaro.org> X-Gm-Message-State: ALoCoQmT7zrEPGMubr+sAvg8cFoF2bV843YxgQngi2Dt9RsKsTpbFki+N38GK+/6hAVq/qGg0wk4 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Rajagopal Venkat 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 | 26 ++++++++++++++++++++++++++ drivers/devfreq/governor.h | 2 ++ drivers/devfreq/governor_simpleondemand.c | 9 +++++++++ include/linux/devfreq.h | 12 ++++++++++++ 4 files changed, 49 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 9bf2b6a..309c46e 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -366,6 +366,32 @@ 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); +} +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); +} +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 fb621f8..4624607 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 7aed0ef..68ad7d7 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -111,6 +111,15 @@ int devfreq_simple_ondemand_handler(struct devfreq *devfreq, else devfreq_monitor_resume(devfreq); 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 7a11c3e..7c7e179 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -155,6 +155,8 @@ 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, @@ -208,6 +210,16 @@ 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) {