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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/devfreq/devfreq.c
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/devfreq/devfreq.c')
-rw-r--r--drivers/devfreq/devfreq.c78
1 files changed, 62 insertions, 16 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index ca848cc6a..984c5e9e7 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -85,6 +85,46 @@ static int devfreq_get_freq_level(struct devfreq *devfreq, unsigned long freq)
}
/**
+ * devfreq_set_freq_table() - Initialize freq_table for the frequency
+ * @devfreq: the devfreq instance
+ */
+static void devfreq_set_freq_table(struct devfreq *devfreq)
+{
+ struct devfreq_dev_profile *profile = devfreq->profile;
+ struct dev_pm_opp *opp;
+ unsigned long freq;
+ int i, count;
+
+ /* Initialize the freq_table from OPP table */
+ count = dev_pm_opp_get_opp_count(devfreq->dev.parent);
+ if (count <= 0)
+ return;
+
+ profile->max_state = count;
+ profile->freq_table = devm_kcalloc(devfreq->dev.parent,
+ profile->max_state,
+ sizeof(*profile->freq_table),
+ GFP_KERNEL);
+ if (!profile->freq_table) {
+ profile->max_state = 0;
+ return;
+ }
+
+ rcu_read_lock();
+ for (i = 0, freq = 0; i < profile->max_state; i++, freq++) {
+ opp = dev_pm_opp_find_freq_ceil(devfreq->dev.parent, &freq);
+ if (IS_ERR(opp)) {
+ devm_kfree(devfreq->dev.parent, profile->freq_table);
+ profile->max_state = 0;
+ rcu_read_unlock();
+ return;
+ }
+ profile->freq_table[i] = freq;
+ }
+ rcu_read_unlock();
+}
+
+/**
* devfreq_update_status() - Update statistics of devfreq behavior
* @devfreq: the devfreq instance
* @freq: the update target frequency
@@ -478,6 +518,12 @@ struct devfreq *devfreq_add_device(struct device *dev,
devfreq->data = data;
devfreq->nb.notifier_call = devfreq_notifier_call;
+ if (!devfreq->profile->max_state && !devfreq->profile->freq_table) {
+ mutex_unlock(&devfreq->lock);
+ devfreq_set_freq_table(devfreq);
+ mutex_lock(&devfreq->lock);
+ }
+
devfreq->trans_table = devm_kzalloc(dev, sizeof(unsigned int) *
devfreq->profile->max_state *
devfreq->profile->max_state,
@@ -921,12 +967,6 @@ unlock:
return ret;
}
-static ssize_t min_freq_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%lu\n", to_devfreq(dev)->min_freq);
-}
-
static ssize_t max_freq_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
@@ -953,13 +993,17 @@ unlock:
mutex_unlock(&df->lock);
return ret;
}
-static DEVICE_ATTR_RW(min_freq);
-static ssize_t max_freq_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%lu\n", to_devfreq(dev)->max_freq);
+#define show_one(name) \
+static ssize_t name##_show \
+(struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ return sprintf(buf, "%lu\n", to_devfreq(dev)->name); \
}
+show_one(min_freq);
+show_one(max_freq);
+
+static DEVICE_ATTR_RW(min_freq);
static DEVICE_ATTR_RW(max_freq);
static ssize_t available_frequencies_show(struct device *d,
@@ -1005,11 +1049,13 @@ static ssize_t trans_stat_show(struct device *dev,
if (!devfreq->stop_polling &&
devfreq_update_status(devfreq, devfreq->previous_freq))
return 0;
+ if (max_state == 0)
+ return sprintf(buf, "Not Supported.\n");
- len = sprintf(buf, " From : To\n");
- len += sprintf(buf + len, " :");
+ len = sprintf(buf, " From : To\n");
+ len += sprintf(buf + len, " :");
for (i = 0; i < max_state; i++)
- len += sprintf(buf + len, "%8u",
+ len += sprintf(buf + len, "%10lu",
devfreq->profile->freq_table[i]);
len += sprintf(buf + len, " time(ms)\n");
@@ -1021,10 +1067,10 @@ static ssize_t trans_stat_show(struct device *dev,
} else {
len += sprintf(buf + len, " ");
}
- len += sprintf(buf + len, "%8u:",
+ len += sprintf(buf + len, "%10lu:",
devfreq->profile->freq_table[i]);
for (j = 0; j < max_state; j++)
- len += sprintf(buf + len, "%8u",
+ len += sprintf(buf + len, "%10u",
devfreq->trans_table[(i * max_state) + j]);
len += sprintf(buf + len, "%10u\n",
jiffies_to_msecs(devfreq->time_in_state[i]));