Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752250Ab2FMEnZ (ORCPT ); Wed, 13 Jun 2012 00:43:25 -0400 Received: from na3sys009aog129.obsmtp.com ([74.125.149.142]:41207 "HELO na3sys009aog129.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751417Ab2FMEnX (ORCPT ); Wed, 13 Jun 2012 00:43:23 -0400 From: Xiaoguang Chen To: linux-kernel@vger.kernel.org Cc: myungjoo.ham@samsung.com, kyungmin.park@samsung.com, Xiaoguang Chen Subject: [PATCH 2/2] PM: Devfreq: Add frequency get function in profile Date: Wed, 13 Jun 2012 12:39:39 +0800 Message-Id: <1339562379-17602-1-git-send-email-chenxg@marvell.com> X-Mailer: git-send-email 1.7.4.1 X-OriginalArrivalTime: 13 Jun 2012 04:39:41.0752 (UTC) FILETIME=[8C6EA380:01CD491E] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2377 Lines: 68 when devfreq set one frequency, the final frequency may not the same as the requested frequency. Add get function in profile to let devfreq driver return the final frequency. Signed-off-by: Xiaoguang Chen --- drivers/devfreq/devfreq.c | 12 +++++++++++- include/linux/devfreq.h | 2 ++ 2 files changed, 13 insertions(+), 1 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 2144200..50a4fc0 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -72,6 +72,16 @@ static struct devfreq *find_device_devfreq(struct device *dev) return ERR_PTR(-ENODEV); } +static unsigned long __devfreq_get(struct device *dev) +{ + struct devfreq *devfreq = to_devfreq(dev); + unsigned long ret_freq = devfreq->previous_freq; + if (!devfreq->profile->get) + return ret_freq; + ret_freq = devfreq->profile->get(devfreq->dev.parent); + return ret_freq; +} + /** * update_devfreq() - Reevaluate the device and configure frequency. * @devfreq: the devfreq instance. @@ -116,7 +126,7 @@ int update_devfreq(struct devfreq *devfreq) if (err) return err; - devfreq->previous_freq = freq; + devfreq->previous_freq = __devfreq_get(&devfreq->dev); return err; } diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index e5e4036..f789314 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -65,6 +65,7 @@ struct devfreq_frequency_table { * @initial_freq The operating frequency when devfreq_add_device() is * called. * @polling_ms The polling interval in ms. 0 disables polling. + * @get Get the devices's actual frequency * @target The device should set its operating frequency at * freq or lowest-upper-than-freq value. If freq is * higher than any operable frequency, set maximum. @@ -84,6 +85,7 @@ struct devfreq_dev_profile { unsigned long initial_freq; unsigned int polling_ms; + unsigned long (*get)(struct device *dev); int (*target)(struct device *dev, unsigned long *freq, u32 flags); int (*get_dev_status)(struct device *dev, struct devfreq_dev_status *stat); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/