+
+/*
+ * Hwmon interface
+ */
+
+static ssize_t i8k_hwmon_show_temp(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ int cpu_temp;
+
+ cpu_temp = i8k_get_temp(0);
+ if (cpu_temp < 0)
+ return cpu_temp;
+ return sprintf(buf, "%d\n", cpu_temp * 1000);
+}
+
+static ssize_t i8k_hwmon_show_fan(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ int fan_speed;
+
+ fan_speed = i8k_get_fan_speed(index);
+ if (fan_speed < 0)
+ return fan_speed;
+ return sprintf(buf, "%d\n", fan_speed);
+}
+
+static ssize_t i8k_hwmon_show_label(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ static const char *labels[4] = {
+ "i8k",
+ "CPU",
+ "Left Fan",
+ "Right Fan",
+ };
+ int index = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%s\n", labels[index]);
+}
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL);
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
+ I8K_FAN_LEFT);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
+ I8K_FAN_RIGHT);
+static SENSOR_DEVICE_ATTR(name, S_IRUGO, i8k_hwmon_show_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 3);
+
+static void i8k_hwmon_remove_files(struct device *dev)
+{
+ device_remove_file(dev, &dev_attr_temp1_input);
+ device_remove_file(dev, &sensor_dev_attr_fan1_input.dev_attr);
+ device_remove_file(dev, &sensor_dev_attr_fan2_input.dev_attr);
+ device_remove_file(dev, &sensor_dev_attr_temp1_label.dev_attr);
+ device_remove_file(dev, &sensor_dev_attr_fan1_label.dev_attr);
+ device_remove_file(dev, &sensor_dev_attr_fan2_label.dev_attr);
+ device_remove_file(dev, &sensor_dev_attr_name.dev_attr);
+}
+
+static int __init i8k_init_hwmon(void)
+{
+ int err;
+
+ i8k_hwmon_dev = hwmon_device_register(NULL);
+ if (IS_ERR(i8k_hwmon_dev)) {
+ err = PTR_ERR(i8k_hwmon_dev);
+ i8k_hwmon_dev = NULL;
+ printk(KERN_ERR "i8k: hwmon registration failed (%d)\n", err);
+ return err;
+ }
+
+ /* Required name attribute */
+ err = device_create_file(i8k_hwmon_dev,
+ &sensor_dev_attr_name.dev_attr);
+ if (err)
+ goto exit_unregister;
+
+ /* CPU temperature attributes, if temperature reading is OK */
+ err = i8k_get_temp(0);
+ if (err < 0) {
+ dev_dbg(i8k_hwmon_dev,
+ "Not creating temperature attributes (%d)\n", err);
+ } else {
+ err = device_create_file(i8k_hwmon_dev, &dev_attr_temp1_input);
+ if (err)
+ goto exit_remove_files;
+ err = device_create_file(i8k_hwmon_dev,
+ &sensor_dev_attr_temp1_label.dev_attr);
+ if (err)
+ goto exit_remove_files;
+ }
+
+ /* Left fan attributes, if left fan is present */
+ err = i8k_get_fan_status(I8K_FAN_LEFT);
+ if (err < 0) {
+ dev_dbg(i8k_hwmon_dev,
+ "Not creating %s fan attributes (%d)\n", "left", err);
+ } else {
+ err = device_create_file(i8k_hwmon_dev,
+ &sensor_dev_attr_fan1_input.dev_attr);
+ if (err)
+ goto exit_remove_files;
+ err = device_create_file(i8k_hwmon_dev,
+ &sensor_dev_attr_fan1_label.dev_attr);
+ if (err)
+ goto exit_remove_files;
+ }
+
+ /* Right fan attributes, if right fan is present */
+ err = i8k_get_fan_status(I8K_FAN_RIGHT);
+ if (err < 0) {
+ dev_dbg(i8k_hwmon_dev,
+ "Not creating %s fan attributes (%d)\n", "right", err);
+ } else {
+ err = device_create_file(i8k_hwmon_dev,
+ &sensor_dev_attr_fan2_input.dev_attr);
+ if (err)
+ goto exit_remove_files;
+ err = device_create_file(i8k_hwmon_dev,
+ &sensor_dev_attr_fan2_label.dev_attr);
+ if (err)
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+ exit_remove_files:
+ i8k_hwmon_remove_files(i8k_hwmon_dev);
+ exit_unregister:
+ hwmon_device_unregister(i8k_hwmon_dev);
+ return err;
+}
+
+static void __exit i8k_exit_hwmon(void)
+{
+ i8k_hwmon_remove_files(i8k_hwmon_dev);
+ hwmon_device_unregister(i8k_hwmon_dev);
+}
+