diff options
| -rw-r--r-- | drivers/hwmon/f71805f.c | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c index 6e65420..173e2d2 100644 --- a/drivers/hwmon/f71805f.c +++ b/drivers/hwmon/f71805f.c @@ -112,6 +112,7 @@ superio_exit(int base) #define F71805F_REG_FAN(nr) (0x20 + 2 * (nr)) #define F71805F_REG_FAN_LOW(nr) (0x28 + 2 * (nr)) #define F71805F_REG_FAN_CTRL(nr) (0x60 + 16 * (nr)) +#define F71805F_REG_PWM_FREQ(nr) (0x63 + 16 * (nr)) #define F71805F_REG_PWM_DUTY(nr) (0x6B + 16 * (nr)) /* temp nr from 0 to 2 (8-bit values) */ #define F71805F_REG_TEMP(nr) (0x1B + (nr)) @@ -153,6 +154,7 @@ struct f71805f_data { u16 fan_low[3]; u8 fan_ctrl[3]; u8 pwm[3]; + u8 pwm_freq[3]; u8 temp[3]; u8 temp_high[3]; u8 temp_hyst[3]; @@ -209,6 +211,28 @@ static inline u16 fan_to_reg(long rpm) return (1500000 / rpm); } +static inline unsigned long pwm_freq_from_reg(u8 reg) +{ + unsigned long clock = (reg & 0x80) ? 48000000UL : 1000000UL; + + reg &= 0x7f; + if (reg == 0) + reg++; + return clock / (reg << 8); +} + +static inline u8 pwm_freq_to_reg(unsigned long val) +{ + if (val >= 187500) /* The highest we can do */ + return 0x80; + if (val >= 1475) /* Use 48 MHz clock */ + return 0x80 | (48000000UL / (val << 8)); + if (val < 31) /* The lowest we can do */ + return 0x7f; + else /* Use 1 MHz clock */ + return 1000000UL / (val << 8); +} + static inline long temp_from_reg(u8 reg) { return (reg * 1000); @@ -294,6 +318,8 @@ static struct f71805f_data *f71805f_update_device(struct device *dev) continue; data->fan_low[nr] = f71805f_read16(data, F71805F_REG_FAN_LOW(nr)); + data->pwm_freq[nr] = f71805f_read8(data, + F71805F_REG_PWM_FREQ(nr)); } for (nr = 0; nr < 3; nr++) { data->temp_high[nr] = f71805f_read8(data, @@ -526,6 +552,16 @@ static ssize_t show_pwm_enable(struct device *dev, struct device_attribute return sprintf(buf, "%d\n", mode); } +static ssize_t show_pwm_freq(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct f71805f_data *data = f71805f_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + int nr = attr->index; + + return sprintf(buf, "%lu\n", pwm_freq_from_reg(data->pwm_freq[nr])); +} + static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { @@ -592,6 +628,22 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute return count; } +static ssize_t set_pwm_freq(struct device *dev, struct device_attribute + *devattr, const char *buf, size_t count) +{ + struct f71805f_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + int nr = attr->index; + unsigned long val = simple_strtoul(buf, NULL, 10); + + mutex_lock(&data->update_lock); + data->pwm_freq[nr] = pwm_freq_to_reg(val); + f71805f_write8(data, F71805F_REG_PWM_FREQ(nr), data->pwm_freq[nr]); + mutex_unlock(&data->update_lock); + + return count; +} + static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, char *buf) { @@ -785,12 +837,18 @@ static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2); static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, show_pwm, set_pwm, 0); static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable, set_pwm_enable, 0); +static SENSOR_DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, + show_pwm_freq, set_pwm_freq, 0); static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO, show_pwm, set_pwm, 1); static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable, set_pwm_enable, 1); +static SENSOR_DEVICE_ATTR(pwm2_freq, S_IRUGO | S_IWUSR, + show_pwm_freq, set_pwm_freq, 1); static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO, show_pwm, set_pwm, 2); static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable, set_pwm_enable, 2); +static SENSOR_DEVICE_ATTR(pwm3_freq, S_IRUGO | S_IWUSR, + show_pwm_freq, set_pwm_freq, 2); static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); @@ -879,13 +937,14 @@ static const struct attribute_group f71805f_group = { .attrs = f71805f_attributes, }; -static struct attribute *f71805f_attributes_fan[3][6] = { +static struct attribute *f71805f_attributes_fan[3][7] = { { &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan1_alarm.dev_attr.attr, &sensor_dev_attr_pwm1.dev_attr.attr, &sensor_dev_attr_pwm1_enable.dev_attr.attr, + &sensor_dev_attr_pwm1_freq.dev_attr.attr, NULL }, { &sensor_dev_attr_fan2_input.dev_attr.attr, @@ -893,6 +952,7 @@ static struct attribute *f71805f_attributes_fan[3][6] = { &sensor_dev_attr_fan2_alarm.dev_attr.attr, &sensor_dev_attr_pwm2.dev_attr.attr, &sensor_dev_attr_pwm2_enable.dev_attr.attr, + &sensor_dev_attr_pwm2_freq.dev_attr.attr, NULL }, { &sensor_dev_attr_fan3_input.dev_attr.attr, @@ -900,6 +960,7 @@ static struct attribute *f71805f_attributes_fan[3][6] = { &sensor_dev_attr_fan3_alarm.dev_attr.attr, &sensor_dev_attr_pwm3.dev_attr.attr, &sensor_dev_attr_pwm3_enable.dev_attr.attr, + &sensor_dev_attr_pwm3_freq.dev_attr.attr, NULL } }; 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