+/*
+ * show_docked - read method for "docked" file in sysfs
+ */
+static ssize_t show_docked(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station));
+
+}
+DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL);
+
+/*
+ * write_undock - write method for "undock" file in sysfs
+ */
+static ssize_t write_undock(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+
+ if (!count)
+ return -EINVAL;
+
+ ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST);
+ return ret ? ret: count;
+}
+DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock);
+