diff options
Diffstat (limited to 'drivers/hwmon/adt7475.c')
| -rw-r--r-- | drivers/hwmon/adt7475.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c index fba2f016e4d..188ae428ccd 100644 --- a/drivers/hwmon/adt7475.c +++ b/drivers/hwmon/adt7475.c @@ -76,6 +76,9 @@ #define REG_EXTEND1 0x76 #define REG_EXTEND2 0x77 #define REG_CONFIG5 0x7C +#define REG_CONFIG4 0x7D + +#define CONFIG4_MAXDUTY 0x08 #define CONFIG5_TWOSCOMP 0x01 #define CONFIG5_TEMPOFFSET 0x02 @@ -132,6 +135,7 @@ struct adt7475_data { unsigned long limits_updated; char valid; + u8 config4; u8 config5; u16 alarms; u16 voltage[3][3]; @@ -779,6 +783,38 @@ static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr, return count; } +static ssize_t show_pwm_at_crit(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct adt7475_data *data = adt7475_update_device(dev); + return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY)); +} + +static ssize_t set_pwm_at_crit(struct device *dev, + struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adt7475_data *data = i2c_get_clientdata(client); + long val; + + if (strict_strtol(buf, 10, &val)) + return -EINVAL; + if (val != 0 && val != 1) + return -EINVAL; + + mutex_lock(&data->lock); + data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4); + if (val) + data->config4 |= CONFIG4_MAXDUTY; + else + data->config4 &= ~CONFIG4_MAXDUTY; + i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4); + mutex_unlock(&data->lock); + + return count; +} + static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 0); static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage, set_voltage, MAX, 0); @@ -894,6 +930,10 @@ static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm, static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm, set_pwm, MAX, 2); +/* Non-standard name, might need revisiting */ +static DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO, + show_pwm_at_crit, set_pwm_at_crit); + static struct attribute *adt7475_attrs[] = { &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, @@ -962,6 +1002,7 @@ static struct attribute *adt7475_attrs[] = { &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, + &dev_attr_pwm_use_point2_pwm_at_crit.attr, NULL, }; @@ -1160,6 +1201,7 @@ static struct adt7475_data *adt7475_update_device(struct device *dev) /* Limits and settings, should never change update every 60 seconds */ if (time_after(jiffies, data->limits_updated + HZ * 60) || !data->valid) { + data->config4 = adt7475_read(REG_CONFIG4); data->config5 = adt7475_read(REG_CONFIG5); for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) { |