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hwmon: (nct6775) Add support for fanX_pulses sysfs attribute 

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
hifive-unleashed-5.1
Guenter Roeck 2012-12-11 07:29:06 -08:00
parent 1c65dc365e
commit 5c25d954d3
1 changed files with 64 additions and 0 deletions
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64
drivers/hwmon/nct6775.c
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@ -205,6 +205,7 @@ static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 };
static const u16 NCT6775_REG_FAN[] = { 0x630, 0x632, 0x634, 0x636, 0x638 };
static const u16 NCT6775_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d };
static const u16 NCT6775_REG_FAN_PULSES[] = { 0x641, 0x642, 0x643, 0x644, 0 };
static const u16 NCT6775_REG_TEMP[] = {
0x27, 0x150, 0x250, 0x62b, 0x62c, 0x62d };
@ -264,6 +265,7 @@ static const s8 NCT6776_ALARM_BITS[] = {
12, 9 }; /* intrusion0, intrusion1 */
static const u16 NCT6776_REG_FAN_MIN[] = { 0x63a, 0x63c, 0x63e, 0x640, 0x642 };
static const u16 NCT6776_REG_FAN_PULSES[] = { 0x644, 0x645, 0x646, 0, 0 };
static const u16 NCT6776_REG_TEMP_CONFIG[ARRAY_SIZE(NCT6775_REG_TEMP)] = {
0x18, 0x152, 0x252, 0x628, 0x629, 0x62A };
@ -319,6 +321,8 @@ static const s8 NCT6779_ALARM_BITS[] = {
12, 9 }; /* intrusion0, intrusion1 */
static const u16 NCT6779_REG_FAN[] = { 0x4b0, 0x4b2, 0x4b4, 0x4b6, 0x4b8 };
static const u16 NCT6779_REG_FAN_PULSES[] = {
0x644, 0x645, 0x646, 0x647, 0x648 };
static const u16 NCT6779_REG_TEMP[] = { 0x27, 0x150 };
static const u16 NCT6779_REG_TEMP_CONFIG[ARRAY_SIZE(NCT6779_REG_TEMP)] = {
@ -462,6 +466,7 @@ struct nct6775_data {
const u16 *REG_FAN;
const u16 *REG_FAN_MIN;
const u16 *REG_FAN_PULSES;
const u16 *REG_TEMP_SOURCE; /* temp register sources */
const u16 *REG_TEMP_OFFSET;
@ -481,6 +486,7 @@ struct nct6775_data {
u8 in[15][3]; /* [0]=in, [1]=in_max, [2]=in_min */
unsigned int rpm[5];
u16 fan_min[5];
u8 fan_pulses[5];
u8 fan_div[5];
u8 has_fan; /* some fan inputs can be disabled */
u8 has_fan_min; /* some fans don't have min register */
@ -802,6 +808,8 @@ static struct nct6775_data *nct6775_update_device(struct device *dev)
if (data->has_fan_min & (1 << i))
data->fan_min[i] = nct6775_read_value(data,
data->REG_FAN_MIN[i]);
data->fan_pulses[i] =
nct6775_read_value(data, data->REG_FAN_PULSES[i]);
nct6775_select_fan_div(dev, data, i, reg);
}
@ -1225,6 +1233,41 @@ write_min:
return count;
}
static ssize_t
show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6775_data *data = nct6775_update_device(dev);
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
int p = data->fan_pulses[sattr->index];
return sprintf(buf, "%d\n", p ? : 4);
}
static ssize_t
store_fan_pulses(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct nct6775_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
int nr = sattr->index;
unsigned long val;
int err;
err = kstrtoul(buf, 10, &val);
if (err < 0)
return err;
if (val > 4)
return -EINVAL;
mutex_lock(&data->update_lock);
data->fan_pulses[nr] = val & 3;
nct6775_write_value(data, data->REG_FAN_PULSES[nr], val & 3);
mutex_unlock(&data->update_lock);
return count;
}
static struct sensor_device_attribute sda_fan_input[] = {
SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0),
SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1),
@ -1254,6 +1297,19 @@ static struct sensor_device_attribute sda_fan_min[] = {
store_fan_min, 4),
};
static struct sensor_device_attribute sda_fan_pulses[] = {
SENSOR_ATTR(fan1_pulses, S_IWUSR | S_IRUGO, show_fan_pulses,
store_fan_pulses, 0),
SENSOR_ATTR(fan2_pulses, S_IWUSR | S_IRUGO, show_fan_pulses,
store_fan_pulses, 1),
SENSOR_ATTR(fan3_pulses, S_IWUSR | S_IRUGO, show_fan_pulses,
store_fan_pulses, 2),
SENSOR_ATTR(fan4_pulses, S_IWUSR | S_IRUGO, show_fan_pulses,
store_fan_pulses, 3),
SENSOR_ATTR(fan5_pulses, S_IWUSR | S_IRUGO, show_fan_pulses,
store_fan_pulses, 4),
};
static struct sensor_device_attribute sda_fan_div[] = {
SENSOR_ATTR(fan1_div, S_IRUGO, show_fan_div, NULL, 0),
SENSOR_ATTR(fan2_div, S_IRUGO, show_fan_div, NULL, 1),
@ -1621,6 +1677,7 @@ static void nct6775_device_remove_files(struct device *dev)
device_remove_file(dev, &sda_fan_alarm[i].dev_attr);
device_remove_file(dev, &sda_fan_div[i].dev_attr);
device_remove_file(dev, &sda_fan_min[i].dev_attr);
device_remove_file(dev, &sda_fan_pulses[i].dev_attr);
}
for (i = 0; i < NUM_TEMP; i++) {
if (!(data->have_temp & (1 << i)))
@ -1809,6 +1866,7 @@ static int nct6775_probe(struct platform_device *pdev)
data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX;
data->REG_FAN = NCT6775_REG_FAN;
data->REG_FAN_MIN = NCT6775_REG_FAN_MIN;
data->REG_FAN_PULSES = NCT6775_REG_FAN_PULSES;
data->REG_TEMP_OFFSET = NCT6775_REG_TEMP_OFFSET;
data->REG_TEMP_SOURCE = NCT6775_REG_TEMP_SOURCE;
data->REG_ALARM = NCT6775_REG_ALARM;
@ -1843,6 +1901,7 @@ static int nct6775_probe(struct platform_device *pdev)
data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX;
data->REG_FAN = NCT6775_REG_FAN;
data->REG_FAN_MIN = NCT6776_REG_FAN_MIN;
data->REG_FAN_PULSES = NCT6776_REG_FAN_PULSES;
data->REG_TEMP_OFFSET = NCT6775_REG_TEMP_OFFSET;
data->REG_TEMP_SOURCE = NCT6775_REG_TEMP_SOURCE;
data->REG_ALARM = NCT6775_REG_ALARM;
@ -1877,6 +1936,7 @@ static int nct6775_probe(struct platform_device *pdev)
data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX;
data->REG_FAN = NCT6779_REG_FAN;
data->REG_FAN_MIN = NCT6776_REG_FAN_MIN;
data->REG_FAN_PULSES = NCT6779_REG_FAN_PULSES;
data->REG_TEMP_OFFSET = NCT6779_REG_TEMP_OFFSET;
data->REG_TEMP_SOURCE = NCT6775_REG_TEMP_SOURCE;
data->REG_ALARM = NCT6779_REG_ALARM;
@ -2094,6 +2154,10 @@ static int nct6775_probe(struct platform_device *pdev)
if (err)
goto exit_remove;
}
err = device_create_file(dev,
&sda_fan_pulses[i].dev_attr);
if (err)
goto exit_remove;
}
}