diff options
author | Rajagopal Venkat <rajagopal.venkat@linaro.org> | 2012-10-25 23:50:26 (GMT) |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-14 23:35:04 (GMT) |
commit | 7f98a905dca6e4f144cdd4462edeac00c2bdc379 (patch) | |
tree | 4841af3592cbd0b21f50a40f17900dfc9fc40804 /drivers/devfreq | |
parent | 206c30cfeb7c05dfb9fdfd81b1deb933627e43c1 (diff) | |
download | linux-7f98a905dca6e4f144cdd4462edeac00c2bdc379.tar.xz |
PM / devfreq: Add current freq callback in device profile
Devfreq returns governor predicted frequency as current frequency
via sysfs interface. But device may not support all frequencies
that governor predicts. So add a callback in device profile to get
current freq from driver. Also add a new sysfs node to expose
governor predicted next target frequency.
Signed-off-by: Rajagopal Venkat <rajagopal.venkat@linaro.org>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r-- | drivers/devfreq/devfreq.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 999600d..f2f8a97 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -464,6 +464,19 @@ static ssize_t show_governor(struct device *dev, static ssize_t show_freq(struct device *dev, struct device_attribute *attr, char *buf) { + unsigned long freq; + struct devfreq *devfreq = to_devfreq(dev); + + if (devfreq->profile->get_cur_freq && + !devfreq->profile->get_cur_freq(devfreq->dev.parent, &freq)) + return sprintf(buf, "%lu\n", freq); + + return sprintf(buf, "%lu\n", devfreq->previous_freq); +} + +static ssize_t show_target_freq(struct device *dev, + struct device_attribute *attr, char *buf) +{ return sprintf(buf, "%lu\n", to_devfreq(dev)->previous_freq); } @@ -563,6 +576,7 @@ static ssize_t show_max_freq(struct device *dev, struct device_attribute *attr, static struct device_attribute devfreq_attrs[] = { __ATTR(governor, S_IRUGO, show_governor, NULL), __ATTR(cur_freq, S_IRUGO, show_freq, NULL), + __ATTR(target_freq, S_IRUGO, show_target_freq, NULL), __ATTR(polling_interval, S_IRUGO | S_IWUSR, show_polling_interval, store_polling_interval), __ATTR(min_freq, S_IRUGO | S_IWUSR, show_min_freq, store_min_freq), |