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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-10-13 01:18:36 -0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-10-13 01:18:36 -0400
commit4783f393de3077211c14675a0e57c8a02e9190b0 (patch)
tree6c37d8664eb072fd026db3706481d771da4495ca /drivers/hwmon/adm1031.c
parent9f5f9ffe50e90ed73040d2100db8bfc341cee352 (diff)
parent5b8544c38e6fde6968645afd46ff681492192b86 (diff)
Merge remote branch 'kumar/merge' into next
Diffstat (limited to 'drivers/hwmon/adm1031.c')
-rw-r--r--drivers/hwmon/adm1031.c43
1 files changed, 24 insertions, 19 deletions
diff --git a/drivers/hwmon/adm1031.c b/drivers/hwmon/adm1031.c
index 15c1a9616af3..0683e6be662c 100644
--- a/drivers/hwmon/adm1031.c
+++ b/drivers/hwmon/adm1031.c
@@ -79,7 +79,7 @@ struct adm1031_data {
79 int chip_type; 79 int chip_type;
80 char valid; /* !=0 if following fields are valid */ 80 char valid; /* !=0 if following fields are valid */
81 unsigned long last_updated; /* In jiffies */ 81 unsigned long last_updated; /* In jiffies */
82 unsigned int update_rate; /* In milliseconds */ 82 unsigned int update_interval; /* In milliseconds */
83 /* The chan_select_table contains the possible configurations for 83 /* The chan_select_table contains the possible configurations for
84 * auto fan control. 84 * auto fan control.
85 */ 85 */
@@ -743,23 +743,23 @@ static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
743static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 13); 743static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 13);
744static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14); 744static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
745 745
746/* Update Rate */ 746/* Update Interval */
747static const unsigned int update_rates[] = { 747static const unsigned int update_intervals[] = {
748 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 748 16000, 8000, 4000, 2000, 1000, 500, 250, 125,
749}; 749};
750 750
751static ssize_t show_update_rate(struct device *dev, 751static ssize_t show_update_interval(struct device *dev,
752 struct device_attribute *attr, char *buf) 752 struct device_attribute *attr, char *buf)
753{ 753{
754 struct i2c_client *client = to_i2c_client(dev); 754 struct i2c_client *client = to_i2c_client(dev);
755 struct adm1031_data *data = i2c_get_clientdata(client); 755 struct adm1031_data *data = i2c_get_clientdata(client);
756 756
757 return sprintf(buf, "%u\n", data->update_rate); 757 return sprintf(buf, "%u\n", data->update_interval);
758} 758}
759 759
760static ssize_t set_update_rate(struct device *dev, 760static ssize_t set_update_interval(struct device *dev,
761 struct device_attribute *attr, 761 struct device_attribute *attr,
762 const char *buf, size_t count) 762 const char *buf, size_t count)
763{ 763{
764 struct i2c_client *client = to_i2c_client(dev); 764 struct i2c_client *client = to_i2c_client(dev);
765 struct adm1031_data *data = i2c_get_clientdata(client); 765 struct adm1031_data *data = i2c_get_clientdata(client);
@@ -771,12 +771,15 @@ static ssize_t set_update_rate(struct device *dev,
771 if (err) 771 if (err)
772 return err; 772 return err;
773 773
774 /* find the nearest update rate from the table */ 774 /*
775 for (i = 0; i < ARRAY_SIZE(update_rates) - 1; i++) { 775 * Find the nearest update interval from the table.
776 if (val >= update_rates[i]) 776 * Use it to determine the matching update rate.
777 */
778 for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) {
779 if (val >= update_intervals[i])
777 break; 780 break;
778 } 781 }
779 /* if not found, we point to the last entry (lowest update rate) */ 782 /* if not found, we point to the last entry (lowest update interval) */
780 783
781 /* set the new update rate while preserving other settings */ 784 /* set the new update rate while preserving other settings */
782 reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER); 785 reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
@@ -785,14 +788,14 @@ static ssize_t set_update_rate(struct device *dev,
785 adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg); 788 adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg);
786 789
787 mutex_lock(&data->update_lock); 790 mutex_lock(&data->update_lock);
788 data->update_rate = update_rates[i]; 791 data->update_interval = update_intervals[i];
789 mutex_unlock(&data->update_lock); 792 mutex_unlock(&data->update_lock);
790 793
791 return count; 794 return count;
792} 795}
793 796
794static DEVICE_ATTR(update_rate, S_IRUGO | S_IWUSR, show_update_rate, 797static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
795 set_update_rate); 798 set_update_interval);
796 799
797static struct attribute *adm1031_attributes[] = { 800static struct attribute *adm1031_attributes[] = {
798 &sensor_dev_attr_fan1_input.dev_attr.attr, 801 &sensor_dev_attr_fan1_input.dev_attr.attr,
@@ -830,7 +833,7 @@ static struct attribute *adm1031_attributes[] = {
830 833
831 &sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr, 834 &sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr,
832 835
833 &dev_attr_update_rate.attr, 836 &dev_attr_update_interval.attr,
834 &dev_attr_alarms.attr, 837 &dev_attr_alarms.attr,
835 838
836 NULL 839 NULL
@@ -981,7 +984,8 @@ static void adm1031_init_client(struct i2c_client *client)
981 mask = ADM1031_UPDATE_RATE_MASK; 984 mask = ADM1031_UPDATE_RATE_MASK;
982 read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER); 985 read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
983 i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT; 986 i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT;
984 data->update_rate = update_rates[i]; 987 /* Save it as update interval */
988 data->update_interval = update_intervals[i];
985} 989}
986 990
987static struct adm1031_data *adm1031_update_device(struct device *dev) 991static struct adm1031_data *adm1031_update_device(struct device *dev)
@@ -993,7 +997,8 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
993 997
994 mutex_lock(&data->update_lock); 998 mutex_lock(&data->update_lock);
995 999
996 next_update = data->last_updated + msecs_to_jiffies(data->update_rate); 1000 next_update = data->last_updated
1001 + msecs_to_jiffies(data->update_interval);
997 if (time_after(jiffies, next_update) || !data->valid) { 1002 if (time_after(jiffies, next_update) || !data->valid) {
998 1003
999 dev_dbg(&client->dev, "Starting adm1031 update\n"); 1004 dev_dbg(&client->dev, "Starting adm1031 update\n");