Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752343Ab2FMEne (ORCPT ); Wed, 13 Jun 2012 00:43:34 -0400 Received: from na3sys009aog129.obsmtp.com ([74.125.149.142]:57805 "HELO na3sys009aog129.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752107Ab2FMEnY (ORCPT ); Wed, 13 Jun 2012 00:43:24 -0400 From: Xiaoguang Chen To: linux-kernel@vger.kernel.org Cc: myungjoo.ham@samsung.com, kyungmin.park@samsung.com, Xiaoguang Chen Subject: [PATCH 1/2] PM: devfreq: add freq table and available_freqs Date: Wed, 13 Jun 2012 12:39:09 +0800 Message-Id: <1339562349-17563-1-git-send-email-chenxg@marvell.com> X-Mailer: git-send-email 1.7.4.1 X-OriginalArrivalTime: 13 Jun 2012 04:39:14.0065 (UTC) FILETIME=[7BEDF010:01CD491E] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3812 Lines: 112 Devfreq framework don't have a frequency table, add it for easy use. Signed-off-by: Xiaoguang Chen --- drivers/devfreq/devfreq.c | 26 ++++++++++++++++++++++++++ include/linux/devfreq.h | 12 ++++++++++++ 2 files changed, 38 insertions(+), 0 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 70c31d4..2144200 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -460,6 +460,17 @@ int devfreq_remove_device(struct devfreq *devfreq) return 0; } +/* + * devfreq_set_freq_table()- Set frequency table for devfreq + * @devfreq The devfreq instance + * @table The frequency table that device supports + */ +void devfreq_set_freq_table(struct devfreq *devfreq, + struct devfreq_frequency_table *table) +{ + devfreq->freq_table = table; +} + static ssize_t show_governor(struct device *dev, struct device_attribute *attr, char *buf) { @@ -472,6 +483,20 @@ static ssize_t show_freq(struct device *dev, return sprintf(buf, "%lu\n", to_devfreq(dev)->previous_freq); } +static ssize_t show_avail_freq(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int len = 0, i; + struct devfreq *devfreq = to_devfreq(dev); + if (devfreq->freq_table) + for (i = 0; devfreq->freq_table[i].frequency != DEVFREQ_TABLE_END; i++) + len += sprintf(buf + len, "%lu\n", + devfreq->freq_table[i].frequency); + if (len == 0) + len += sprintf(buf + len, "No frequency table is provided\n"); + return len; +} + static ssize_t show_polling_interval(struct device *dev, struct device_attribute *attr, char *buf) { @@ -595,6 +620,7 @@ static struct device_attribute devfreq_attrs[] = { store_polling_interval), __ATTR(min_freq, S_IRUGO | S_IWUSR, show_min_freq, store_min_freq), __ATTR(max_freq, S_IRUGO | S_IWUSR, show_max_freq, store_max_freq), + __ATTR(available_freqs, S_IRUGO, show_avail_freq, NULL), { }, }; diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 281c72a..e5e4036 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -52,6 +52,14 @@ struct devfreq_dev_status { */ #define DEVFREQ_FLAG_LEAST_UPPER_BOUND 0x1 +#define DEVFREQ_ENTRY_INVALID (~0) +#define DEVFREQ_TABLE_END (~1) + +struct devfreq_frequency_table { + unsigned int index; + unsigned long frequency; +}; + /** * struct devfreq_dev_profile - Devfreq's user device profile * @initial_freq The operating frequency when devfreq_add_device() is @@ -130,6 +138,7 @@ struct devfreq_governor { * "devfreq_monitor" executions to reevaluate * frequency/voltage of the device. Set by * profile's polling_ms interval. + * @freq_table The frequency table that device supports * @data Private data of the governor. The devfreq framework does not * touch this. * @being_removed a flag to mark that this object is being removed in @@ -157,6 +166,7 @@ struct devfreq { unsigned long polling_jiffies; unsigned long previous_freq; unsigned int next_polling; + struct devfreq_frequency_table *freq_table; void *data; /* private data for governors */ @@ -180,6 +190,8 @@ extern int devfreq_register_opp_notifier(struct device *dev, struct devfreq *devfreq); extern int devfreq_unregister_opp_notifier(struct device *dev, struct devfreq *devfreq); +extern void devfreq_set_freq_table(struct devfreq *devfreq, + struct devfreq_frequency_table *table); #ifdef CONFIG_DEVFREQ_GOV_POWERSAVE extern const struct devfreq_governor devfreq_powersave; -- 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/