HID: ll_driver: Extend the interface with idle requests
Some drivers send the idle command directly to underlying device,
creating an unwanted dependency on the underlying transport layer.
This patch adds hid_hw_idle() to the interface, thereby removing
usbhid from the lion share of the drivers.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 7071eb3..863744c 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -664,6 +664,7 @@
* shouldn't allocate anything to not leak memory
* @request: send report request to device (e.g. feature report)
* @wait: wait for buffered io to complete (send/recv reports)
+ * @idle: send idle request to device
*/
struct hid_ll_driver {
int (*start)(struct hid_device *hdev);
@@ -683,6 +684,7 @@
struct hid_report *report, int reqtype);
int (*wait)(struct hid_device *hdev);
+ int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
};
@@ -907,6 +909,23 @@
}
/**
+ * hid_hw_idle - send idle request to device
+ *
+ * @hdev: hid device
+ * @report: report to control
+ * @idle: idle state
+ * @reqtype: hid request type
+ */
+static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
+ int reqtype)
+{
+ if (hdev->ll_driver->idle)
+ return hdev->ll_driver->idle(hdev, report, idle, reqtype);
+
+ return 0;
+}
+
+/**
* hid_hw_wait - wait for buffered io to complete
*
* @hdev: hid device