Commit ed6fe1f5 authored Jun 23, 2016 by Johannes Berg Committed by Felipe Balbi Aug 25, 2016

usb: gadget: f_hid: add dev to configfs



Even if the /dev/hidg* chardev is automatically created, one
has to guess which one belongs to which function. In the case
of multiple HID functions, or maybe even multiple peripherals,
this becomes difficult.

Add the dev (with major and minor number) to configfs to allow
looking up (or even creating) the right device node for each
function. This file is read-only.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

parent 00af6233

drivers/usb/gadget/function/f_hid.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -809,11 +809,21 @@ static ssize_t f_hid_opts_report_desc_store(struct config_item *item,

		CONFIGFS_ATTR(f_hid_opts_, report_desc);

		static ssize_t f_hid_opts_dev_show(struct config_item item, char page)
		{
		struct f_hid_opts *opts = to_f_hid_opts(item);

		return sprintf(page, "%d:%d\n", major, opts->minor);
		}

		CONFIGFS_ATTR_RO(f_hid_opts_, dev);

		static struct configfs_attribute *hid_attrs[] = {
		&f_hid_opts_attr_subclass,
		&f_hid_opts_attr_protocol,
		&f_hid_opts_attr_report_length,
		&f_hid_opts_attr_report_desc,
		&f_hid_opts_attr_dev,
		NULL,
		};