usb: gadget: hid: add configfs support

Make the hid function available for gadgets composed with configfs.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/usb/gadget_hid.txt b/Documentation/usb/gadget_hid.txt
index 12696c2e43fb..7a0fb8e16e27 100644
--- a/Documentation/usb/gadget_hid.txt
+++ b/Documentation/usb/gadget_hid.txt
@@ -74,6 +74,13 @@ static struct platform_device my_hid = {
         You can add as many HID functions as you want, only limited by
         the amount of interrupt endpoints your gadget driver supports.
 
+Configuration with configfs
+
+        Instead of adding fake platform devices and drivers in order to pass
+        some data to the kernel, if HID is a part of a gadget composed with
+        configfs the hidg_func_descriptor.report_desc is passed to the kernel
+        by writing the appropriate stream of bytes to a configfs attribute.
+
 Send and receive HID reports
 
         HID reports can be sent/received using read/write on the