struct gpio_desc *wakeup;
int irq;
bool active;
+
+ struct mutex gdev_mutex;
+ bool open;
+
wait_queue_head_t power_wait;
};
struct serdev_device *serdev = data->serdev;
int ret;
+ mutex_lock(&data->gdev_mutex);
+ data->open = true;
+ mutex_unlock(&data->gdev_mutex);
+
ret = serdev_device_open(serdev);
- if (ret)
+ if (ret) {
+ mutex_lock(&data->gdev_mutex);
+ data->open = false;
+ mutex_unlock(&data->gdev_mutex);
return ret;
+ }
+
serdev_device_set_baudrate(serdev, data->speed);
serdev_device_set_flow_control(serdev, false);
err_close:
serdev_device_close(serdev);
+ mutex_lock(&data->gdev_mutex);
+ data->open = false;
+ mutex_unlock(&data->gdev_mutex);
+
return ret;
}
serdev_device_close(serdev);
pm_runtime_put(&serdev->dev);
+
+ mutex_lock(&data->gdev_mutex);
+ data->open = false;
+ mutex_unlock(&data->gdev_mutex);
}
static int sirf_write_raw(struct gnss_device *gdev, const unsigned char *buf,
{
struct sirf_data *data = serdev_device_get_drvdata(serdev);
struct gnss_device *gdev = data->gdev;
+ int ret = 0;
- return gnss_insert_raw(gdev, buf, count);
+ mutex_lock(&data->gdev_mutex);
+ if (data->open)
+ ret = gnss_insert_raw(gdev, buf, count);
+ mutex_unlock(&data->gdev_mutex);
+
+ return ret;
}
static const struct serdev_device_ops sirf_serdev_ops = {
data->serdev = serdev;
data->gdev = gdev;
+ mutex_init(&data->gdev_mutex);
init_waitqueue_head(&data->power_wait);
serdev_device_set_drvdata(serdev, data);