+/**
+ * pnp_start_dev - low-level start of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * assumes that resources have alread been allocated
+ */
+
+int pnp_start_dev(struct pnp_dev *dev)
+{
+ if (!pnp_can_write(dev)) {
+ pnp_info("Device %s does not support activation.", dev->dev.bus_id);
+ return -EINVAL;
+ }
+
+ if (dev->protocol->set(dev, &dev->res)<0) {
+ pnp_err("Failed to activate device %s.", dev->dev.bus_id);
+ return -EIO;
+ }
+
+ pnp_info("Device %s activated.", dev->dev.bus_id);
+
+ return 0;
+}
+
+/**
+ * pnp_stop_dev - low-level disable of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * does not free resources
+ */
+
+int pnp_stop_dev(struct pnp_dev *dev)
+{
+ if (!pnp_can_disable(dev)) {
+ pnp_info("Device %s does not support disabling.", dev->dev.bus_id);
+ return -EINVAL;
+ }
+ if (dev->protocol->disable(dev)<0) {
+ pnp_err("Failed to disable device %s.", dev->dev.bus_id);
+ return -EIO;
+ }
+
+ pnp_info("Device %s disabled.", dev->dev.bus_id);
+
+ return 0;
+}
+