From patchwork Mon Sep 3 14:29:37 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajagopal Venkat X-Patchwork-Id: 1400211 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 205BEDF280 for ; Mon, 3 Sep 2012 14:32:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932277Ab2ICOcG (ORCPT ); Mon, 3 Sep 2012 10:32:06 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:56458 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932131Ab2ICOcA (ORCPT ); Mon, 3 Sep 2012 10:32:00 -0400 Received: by mail-pb0-f46.google.com with SMTP id rr13so8152699pbb.19 for ; Mon, 03 Sep 2012 07:32:00 -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=ncTPDnIuOScB6BbPMPF+vtEF8TtP73M1UN6HQsWuuow=; b=prNlkbYybCz7DgXHkBKte0Db6W3k/u6FzKZ9pm2irn9JvEN7HZhClds6rA9EDoXy2g Scf2DV9D0awZO1dBviogd1LqN1VbEHiKsXvfNg7TAawNCOqrm5aNLnE43tlbcIBJRWIA P8t27PUtUkzw9gjpIN/K8ugLaPR+NQ+iPBSATyiup/MyiU36z5HWqFqEOz1DRhmw949a m8+96sPJ8CEY6Z4OzxWjP4VNa97GpqYx+YMTsVw/O1Gkcaqk2xU46KCQyXdugnp3fJJB +JucGvX3lS7Z7LGHXCMwfT3LxwgvmQEwZMguCl8NS4oNcFgH3NaXLNrGlgnzm2CxG6ta Dp4g== Received: by 10.68.224.133 with SMTP id rc5mr38217130pbc.130.1346682720709; Mon, 03 Sep 2012 07:32:00 -0700 (PDT) Received: from localhost.localdomain ([101.63.135.0]) by mx.google.com with ESMTPS id kp3sm10029261pbc.64.2012.09.03.07.31.55 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 03 Sep 2012 07:32:00 -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 2/3] devfreq: Add suspend and resume apis Date: Mon, 3 Sep 2012 19:59:37 +0530 Message-Id: <1346682578-24312-3-git-send-email-rajagopal.venkat@linaro.org> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1346682578-24312-1-git-send-email-rajagopal.venkat@linaro.org> References: <1346682578-24312-1-git-send-email-rajagopal.venkat@linaro.org> X-Gm-Message-State: ALoCoQkWVn9rXzMxzFrgDtBBsDKm1j4Sf0U5xN7PDalobXmq/cffRWG+ntCnlvsq/S2pPw4jxCCa 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 | 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 be524c7..3a5f126 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -365,6 +365,32 @@ 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 4a86af7..7dbbdfc 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 9802bf9..35b8e8e 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -113,6 +113,15 @@ int devfreq_simple_ondemand_handler(struct devfreq *devfreq, else ret = devfreq_monitor_resume(devfreq); break; + + case DEVFREQ_GOV_SUSPEND: + ret = devfreq_monitor_suspend(devfreq); + break; + + case DEVFREQ_GOV_RESUME: + ret = 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) {