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hwmon: (w83795) Expose fan control method 

Expose fan control method (DC vs. PWM) using the standard sysfs
attributes. I've made it read-only as the board should be wired for
a given mode, the BIOS should have set up the chip for this mode, and
you shouldn't have to change it. But it would be easy enough to make
it changeable if someone comes up with a use case.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
hifive-unleashed-5.1
Jean Delvare 2010-11-15 21:38:56 +01:00 committed by Jean Delvare
parent ae51cd9bcd
commit d5ab845a13
1 changed files with 18 additions and 1 deletions
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19
drivers/hwmon/w83795.c
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@ -915,6 +915,21 @@ store_pwm_enable(struct device *dev, struct device_attribute *attr,
return count;
}
static ssize_t
show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w83795_data *data = w83795_update_pwm_config(dev);
int index = to_sensor_dev_attr_2(attr)->index;
unsigned int mode;
if (data->pwm_fomc & (1 << index))
mode = 0; /* DC */
else
mode = 1; /* PWM */
return sprintf(buf, "%u\n", mode);
}
static ssize_t
show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
{
@ -1551,6 +1566,8 @@ store_sf_setup(struct device *dev, struct device_attribute *attr,
show_pwm, store_pwm, PWM_FREQ, index - 1), \
SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO, \
show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO, \
show_pwm_mode, NULL, NOT_USED, index - 1), \
SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
show_fanin, store_fanin, FANIN_TARGET, index - 1) }
@ -1698,7 +1715,7 @@ static const struct sensor_device_attribute_2 w83795_dts[][8] = {
SENSOR_ATTR_DTS(14),
};
static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
SENSOR_ATTR_PWM(1),
SENSOR_ATTR_PWM(2),
SENSOR_ATTR_PWM(3),