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hwmon/f71805f: Support DC fan speed control mode 

In DC mode, the pwmN_freq files are not created.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
hifive-unleashed-5.1
Jean Delvare 2006-12-12 18:18:27 +01:00 committed by Jean Delvare
parent 6e2bc17b07
commit e196783d54
1 changed files with 43 additions and 3 deletions
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46
drivers/hwmon/f71805f.c
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@ -126,6 +126,7 @@ superio_exit(int base)
/* individual register bits */
#define FAN_CTRL_SKIP 0x80
#define FAN_CTRL_DC_MODE 0x10
#define FAN_CTRL_MODE_MASK 0x03
#define FAN_CTRL_MODE_SPEED 0x00
#define FAN_CTRL_MODE_TEMPERATURE 0x01
@ -233,6 +234,11 @@ static inline u8 pwm_freq_to_reg(unsigned long val)
return 1000000UL / (val << 8);
}
static inline int pwm_mode_from_reg(u8 reg)
{
return !(reg & FAN_CTRL_DC_MODE);
}
static inline long temp_from_reg(u8 reg)
{
return (reg * 1000);
@ -562,6 +568,16 @@ static ssize_t show_pwm_freq(struct device *dev, struct device_attribute
return sprintf(buf, "%lu\n", pwm_freq_from_reg(data->pwm_freq[nr]));
}
static ssize_t show_pwm_mode(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, "%d\n", pwm_mode_from_reg(data->fan_ctrl[nr]));
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
@ -839,16 +855,19 @@ 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(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 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(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 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(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 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);
@ -944,7 +963,7 @@ static struct attribute *f71805f_attributes_fan[3][7] = {
&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,
&sensor_dev_attr_pwm1_mode.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_fan2_input.dev_attr.attr,
@ -952,7 +971,7 @@ static struct attribute *f71805f_attributes_fan[3][7] = {
&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,
&sensor_dev_attr_pwm2_mode.dev_attr.attr,
NULL
}, {
&sensor_dev_attr_fan3_input.dev_attr.attr,
@ -960,7 +979,7 @@ static struct attribute *f71805f_attributes_fan[3][7] = {
&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,
&sensor_dev_attr_pwm3_mode.dev_attr.attr,
NULL
}
};
@ -971,6 +990,19 @@ static const struct attribute_group f71805f_group_fan[3] = {
{ .attrs = f71805f_attributes_fan[2] },
};
/* We don't include pwm_freq files in the arrays above, because they must be
created conditionally (only if pwm_mode is 1 == PWM) */
static struct attribute *f71805f_attributes_pwm_freq[] = {
&sensor_dev_attr_pwm1_freq.dev_attr.attr,
&sensor_dev_attr_pwm2_freq.dev_attr.attr,
&sensor_dev_attr_pwm3_freq.dev_attr.attr,
NULL
};
static const struct attribute_group f71805f_group_pwm_freq = {
.attrs = f71805f_attributes_pwm_freq,
};
/* We also need an indexed access to pwmN files to toggle writability */
static struct attribute *f71805f_attr_pwm[] = {
&sensor_dev_attr_pwm1.dev_attr.attr,
@ -1034,6 +1066,12 @@ static int __devinit f71805f_probe(struct platform_device *pdev)
if ((err = sysfs_create_group(&pdev->dev.kobj,
&f71805f_group_fan[i])))
goto exit_remove_files;
/* If control mode is PWM, create pwm_freq file */
if (!(data->fan_ctrl[i] & FAN_CTRL_DC_MODE)) {
if ((err = sysfs_create_file(&pdev->dev.kobj,
f71805f_attributes_pwm_freq[i])))
goto exit_remove_files;
}
/* If PWM is in manual mode, add write permission */
if (data->fan_ctrl[i] & FAN_CTRL_MODE_MANUAL) {
if ((err = sysfs_chmod_file(&pdev->dev.kobj,
@ -1059,6 +1097,7 @@ exit_remove_files:
sysfs_remove_group(&pdev->dev.kobj, &f71805f_group);
for (i = 0; i < 3; i++)
sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_fan[i]);
sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);
exit_free:
platform_set_drvdata(pdev, NULL);
kfree(data);
@ -1076,6 +1115,7 @@ static int __devexit f71805f_remove(struct platform_device *pdev)
sysfs_remove_group(&pdev->dev.kobj, &f71805f_group);
for (i = 0; i < 3; i++)
sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_fan[i]);
sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);
kfree(data);
return 0;