diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/w83791d.c | 67 |
1 files changed, 66 insertions, 1 deletions
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c index 6b1cec9950ff..a8ff4e126713 100644 --- a/drivers/hwmon/w83791d.c +++ b/drivers/hwmon/w83791d.c @@ -23,7 +23,7 @@ Supports following chips: Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA - w83791d 10 5 3 3 0x71 0x5ca3 yes no + w83791d 10 5 5 3 0x71 0x5ca3 yes no The w83791d chip appears to be part way between the 83781d and the 83792d. Thus, this file is derived from both the w83792d.c and @@ -45,6 +45,7 @@ #define NUMBER_OF_VIN 10 #define NUMBER_OF_FANIN 5 #define NUMBER_OF_TEMPIN 3 +#define NUMBER_OF_PWM 5 /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, @@ -116,6 +117,14 @@ static const u8 W83791D_REG_FAN_MIN[NUMBER_OF_FANIN] = { 0xBD, /* FAN 5 Count Low Limit in DataSheet */ }; +static const u8 W83791D_REG_PWM[NUMBER_OF_PWM] = { + 0x81, /* PWM 1 duty cycle register in DataSheet */ + 0x83, /* PWM 2 duty cycle register in DataSheet */ + 0x94, /* PWM 3 duty cycle register in DataSheet */ + 0xA0, /* PWM 4 duty cycle register in DataSheet */ + 0xA1, /* PWM 5 duty cycle register in DataSheet */ +}; + static const u8 W83791D_REG_FAN_CFG[2] = { 0x84, /* FAN 1/2 configuration */ 0x95, /* FAN 3 configuration */ @@ -276,6 +285,9 @@ struct w83791d_data { two sensors with three values (cur, over, hyst) */ + /* PWMs */ + u8 pwm[5]; /* pwm duty cycle */ + /* Misc */ u32 alarms; /* realtime status register encoding,combined */ u8 beep_enable; /* Global beep enable */ @@ -653,6 +665,48 @@ static struct sensor_device_attribute sda_fan_alarm[] = { SENSOR_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22), }; +/* read/write PWMs */ +static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + int nr = sensor_attr->index; + struct w83791d_data *data = w83791d_update_device(dev); + return sprintf(buf, "%u\n", data->pwm[nr]); +} + +static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + struct i2c_client *client = to_i2c_client(dev); + struct w83791d_data *data = i2c_get_clientdata(client); + int nr = sensor_attr->index; + unsigned long val; + + if (strict_strtoul(buf, 10, &val)) + return -EINVAL; + + mutex_lock(&data->update_lock); + data->pwm[nr] = SENSORS_LIMIT(val, 0, 255); + w83791d_write(client, W83791D_REG_PWM[nr], data->pwm[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +static struct sensor_device_attribute sda_pwm[] = { + SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, + show_pwm, store_pwm, 0), + SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, + show_pwm, store_pwm, 1), + SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO, + show_pwm, store_pwm, 2), + SENSOR_ATTR(pwm4, S_IWUSR | S_IRUGO, + show_pwm, store_pwm, 3), + SENSOR_ATTR(pwm5, S_IWUSR | S_IRUGO, + show_pwm, store_pwm, 4), +}; + /* read/write the temperature1, includes measured value and limits */ static ssize_t show_temp1(struct device *dev, struct device_attribute *devattr, char *buf) @@ -917,6 +971,9 @@ static struct attribute *w83791d_attributes[] = { &sda_beep_ctrl[1].dev_attr.attr, &dev_attr_cpu0_vid.attr, &dev_attr_vrm.attr, + &sda_pwm[0].dev_attr.attr, + &sda_pwm[1].dev_attr.attr, + &sda_pwm[2].dev_attr.attr, NULL }; @@ -930,6 +987,8 @@ static const struct attribute_group w83791d_group = { static struct attribute *w83791d_attributes_fanpwm45[] = { FAN_UNIT_ATTRS(3), FAN_UNIT_ATTRS(4), + &sda_pwm[3].dev_attr.attr, + &sda_pwm[4].dev_attr.attr, NULL }; @@ -1260,6 +1319,12 @@ static struct w83791d_data *w83791d_update_device(struct device *dev) for (i = 0; i < 3; i++) data->fan_div[i] |= (vbat_reg >> (3 + i)) & 0x04; + /* Update PWM duty cycle */ + for (i = 0; i < NUMBER_OF_PWM; i++) { + data->pwm[i] = w83791d_read(client, + W83791D_REG_PWM[i]); + } + /* Update the first temperature sensor */ for (i = 0; i < 3; i++) { data->temp1[i] = w83791d_read(client, |