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hwmon: (it87) Expose the PWM/temperature mappings

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Let the user read the PWM-to-temperature mappings. Until the trip
points are also exposed, this is essentially a way to know how the
BIOS has set things up. The ability to change the settings will be
added later, together with the trip points.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2010-03-05 22:17:16 +01:00
parent b99883dcd5
commit 94ac7ee616
1 changed files with 69 additions and 4 deletions
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73
drivers/hwmon/it87.c
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@ -751,6 +751,59 @@ static ssize_t set_pwm_freq(struct device *dev,
return count;
}
static ssize_t show_pwm_temp_map(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 it87_data *data = it87_update_device(dev);
int map;
if (data->pwm_temp_map[nr] < 3)
map = 1 << data->pwm_temp_map[nr];
else
map = 0; /* Should never happen */
return sprintf(buf, "%d\n", map);
}
static ssize_t set_pwm_temp_map(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct it87_data *data = dev_get_drvdata(dev);
long val;
u8 reg;
if (strict_strtol(buf, 10, &val) < 0)
return -EINVAL;
switch (val) {
case (1 << 0):
reg = 0x00;
break;
case (1 << 1):
reg = 0x01;
break;
case (1 << 2):
reg = 0x02;
break;
default:
return -EINVAL;
}
mutex_lock(&data->update_lock);
data->pwm_temp_map[nr] = reg;
/* If we are in automatic mode, write the temp mapping immediately;
* otherwise, just store it for later use. */
if (data->pwm_ctrl[nr] & 0x80) {
data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
}
mutex_unlock(&data->update_lock);
return count;
}
#define show_fan_offset(offset) \
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
@ -771,7 +824,10 @@ static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, offset - 1); \
static DEVICE_ATTR(pwm##offset##_freq, \
(offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
S_IRUGO, show_pwm_temp_map, set_pwm_temp_map, \
offset - 1);
show_pwm_offset(1);
show_pwm_offset(2);
@ -995,6 +1051,9 @@ static struct attribute *it87_attributes_opt[] = {
&dev_attr_pwm1_freq.attr,
&dev_attr_pwm2_freq.attr,
&dev_attr_pwm3_freq.attr,
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
&dev_attr_vrm.attr,
&dev_attr_cpu0_vid.attr,
@ -1268,7 +1327,9 @@ static int __devinit it87_probe(struct platform_device *pdev)
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm1.dev_attr))
|| (err = device_create_file(dev,
&dev_attr_pwm1_freq)))
&dev_attr_pwm1_freq))
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr)))
goto ERROR4;
}
if (!(sio_data->skip_pwm & (1 << 1))) {
@ -1277,7 +1338,9 @@ static int __devinit it87_probe(struct platform_device *pdev)
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm2.dev_attr))
|| (err = device_create_file(dev,
&dev_attr_pwm2_freq)))
&dev_attr_pwm2_freq))
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr)))
goto ERROR4;
}
if (!(sio_data->skip_pwm & (1 << 2))) {
@ -1286,7 +1349,9 @@ static int __devinit it87_probe(struct platform_device *pdev)
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm3.dev_attr))
|| (err = device_create_file(dev,
&dev_attr_pwm3_freq)))
&dev_attr_pwm3_freq))
|| (err = device_create_file(dev,
&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr)))
goto ERROR4;
}
}