Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

odroid_fan: expose temp_levels and fan_speeds via sysfs #71

Merged
merged 1 commit into from Jan 2, 2015
Merged

odroid_fan: expose temp_levels and fan_speeds via sysfs #71

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
85 changes: 84 additions & 1 deletion drivers/hardkernel/odroid_fan.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -86,10 +86,20 @@ static ssize_t set_pwm_duty (struct device *dev, struct device_attribute *attr,
static ssize_t show_pwm_duty (struct device *dev, struct device_attribute *attr, char *buf);
static DEVICE_ATTR(pwm_duty, S_IRWXUGO, show_pwm_duty, set_pwm_duty);

static ssize_t set_temp_levels (struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t show_temp_levels (struct device *dev, struct device_attribute *attr, char *buf);
static DEVICE_ATTR(temp_levels, S_IRWXUGO, show_temp_levels, set_temp_levels);

static ssize_t set_fan_speeds (struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t show_fan_speeds (struct device *dev, struct device_attribute *attr, char *buf);
static DEVICE_ATTR(fan_speeds, S_IRWXUGO, show_fan_speeds, set_fan_speeds);

static struct attribute *odroid_fan_sysfs_entries[] = {
&dev_attr_pwm_enable.attr,
&dev_attr_fan_mode.attr,
&dev_attr_pwm_duty.attr,
&dev_attr_temp_levels.attr,
&dev_attr_fan_speeds.attr,
NULL
};

Expand Down Expand Up @@ -210,6 +220,79 @@ static ssize_t show_pwm_duty (struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%d\n", fan->duty);
}

//[*]------------------------------------------------------------------------------------------------------------------
//[*]------------------------------------------------------------------------------------------------------------------
static ssize_t set_temp_levels (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct odroid_fan *fan = dev_get_drvdata(dev);
unsigned int level_0, level_1, level_2;

if(sscanf(buf, "%u %u %u\n", &level_0, &level_1, &level_2) != 3) return -EINVAL;

if(!(level_0 < level_1 && level_1 < level_2)){
printk("temperature levels must be increasing in value\n");
return count;
}

printk("temp_levels : %s [%d %d %d] \n",__FUNCTION__, level_0, level_1, level_2);

mutex_lock(&fan->mutex);
fan->tmu_level_0 = level_0;
fan->tmu_level_1 = level_1;
fan->tmu_level_2 = level_2;
mutex_unlock(&fan->mutex);

return count;
}

static ssize_t show_temp_levels (struct device *dev, struct device_attribute *attr, char *buf)
{
struct odroid_fan *fan = dev_get_drvdata(dev);
ssize_t result;

mutex_lock(&fan->mutex);
result = sprintf(buf, "%d %d %d\n", fan->tmu_level_0, fan->tmu_level_1, fan->tmu_level_2);
mutex_unlock(&fan->mutex);
return result;
}

//[*]------------------------------------------------------------------------------------------------------------------
//[*]------------------------------------------------------------------------------------------------------------------
static ssize_t set_fan_speeds (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct odroid_fan *fan = dev_get_drvdata(dev);
unsigned int speed_0, speed_1, speed_2, speed_3;

if(sscanf(buf, "%u %u %u %u\n", &speed_0, &speed_1, &speed_2, &speed_3) != 4) return -EINVAL;

if(!(speed_0 < speed_1 && speed_1 < speed_2 && speed_2 < speed_3)){
printk("fan speeds must be increasing in value\n");
return count;
}

printk("fan_speeds : %s [%d %d %d %d] \n",__FUNCTION__, speed_0, speed_1, speed_2, speed_3);

mutex_lock(&fan->mutex);
fan->fan_speed_0 = speed_0;
fan->fan_speed_1 = speed_1;
fan->fan_speed_2 = speed_2;
fan->fan_speed_3 = speed_3;
mutex_unlock(&fan->mutex);

return count;
}

static ssize_t show_fan_speeds (struct device *dev, struct device_attribute *attr, char *buf)
{
struct odroid_fan *fan = dev_get_drvdata(dev);
ssize_t result;

mutex_lock(&fan->mutex);
result = sprintf(buf, "%d %d %d %d\n", fan->fan_speed_0, fan->fan_speed_1, fan->fan_speed_2, fan->fan_speed_3);
mutex_unlock(&fan->mutex);
return result;
}

//[*]--------------------------------------------------------------------------------------------------[*]
//[*]--------------------------------------------------------------------------------------------------[*]
static void odroid_fan_work(struct work_struct *work)
Expand All @@ -222,14 +305,14 @@ static void odroid_fan_work(struct work_struct *work)

temp = exynos_thermal_get_value();

mutex_lock(&fan->mutex);
if(temp<fan->tmu_level_0) duty_percent=fan->fan_speed_0;
else if(temp<fan->tmu_level_1) duty_percent=fan->fan_speed_1;
else if(temp<fan->tmu_level_2) duty_percent=fan->fan_speed_2;
else duty_percent=fan->fan_speed_3;

fan->duty = (255 * duty_percent)/100;

mutex_lock(&fan->mutex);
if(fan->pwm_status){
pwm_disable(fan->pwm);
pwm_config(fan->pwm, fan->duty * fan->period / 255, fan->period);
Expand Down