static ssize_t store_request(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
int wanted;
int req_freq;
int err = 0;
req_freq = 0;
mutex_lock(&devfreq->lock);
data = devfreq->data;
sscanf(buf, "%d", &wanted);
if(data){
data->req_bw += wanted;
pr_debug("*** %s, request:%d, total request:%d ***\n",
__func__, wanted, data->req_bw);
if(data->req_bw < 0)
data->req_bw = 0;
if(data->convert_bw_to_freq)
req_freq = data->convert_bw_to_freq(wanted);
}
user_requests.req_sum += req_freq;
if(user_requests.req_sum < 0)
user_requests.req_sum = 0;
err = update_devfreq(devfreq);
if (err == 0)
err = count;
mutex_unlock(&devfreq->lock);
return err;
}
static ssize_t show_perf(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
int err = 0;
mutex_lock(&devfreq->lock);
data = devfreq->data;
if(data)
err = sprintf(buf, "%lu KHz \n", data->set_freq);
mutex_unlock(&devfreq->lock);
return err;
}
static ssize_t store_enable(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
unsigned long wanted;
mutex_lock(&devfreq->lock);
data = devfreq->data;
sscanf(buf, "%lu", &wanted);
if(data){
data->enable = wanted;
}
mutex_unlock(&devfreq->lock);
return count;
}
static ssize_t show_upthreshold(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
int err = 0;
mutex_lock(&devfreq->lock);
data = devfreq->data;
if(data){
err = sprintf(buf, "%lu\n", data->upthreshold);
}else
err = sprintf(buf, "%d\n", DFO_UPTHRESHOLD);
mutex_unlock(&devfreq->lock);
return err;
}
static ssize_t show_downdifferential(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
int err = 0;
mutex_lock(&devfreq->lock);
data = devfreq->data;
if(data){
err = sprintf(buf, "%lu\n", data->downdifferential);
}else{
err = sprintf(buf, "%d\n", DFO_DOWNDIFFERENCTIAL);
}
mutex_unlock(&devfreq->lock);
return err;
}
static ssize_t show_freq(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
int err = 0;
mutex_lock(&devfreq->lock);
data = devfreq->data;
if (data->valid)
err = sprintf(buf, "%lu\n", data->user_frequency);
else
err = sprintf(buf, "undefined\n");
mutex_unlock(&devfreq->lock);
return err;
}
static ssize_t store_freq(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct devfreq *devfreq = to_devfreq(dev);
struct userspace_data *data;
unsigned long wanted;
int err = 0;
mutex_lock(&devfreq->lock);
data = devfreq->data;
sscanf(buf, "%lu", &wanted);
data->user_frequency = wanted;
data->valid = true;
err = update_devfreq(devfreq);
if (err == 0)
err = count;
mutex_unlock(&devfreq->lock);
return err;
}