From ed6fe1f50f0c0fdea674dfa739af50011034bdfa Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Jun 2016 22:28:54 +0200 Subject: [PATCH] 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 Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_hid.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c index 51980c50546d..4cd486600a9b 100644 --- a/drivers/usb/gadget/function/f_hid.c +++ b/drivers/usb/gadget/function/f_hid.c @@ -809,11 +809,21 @@ end: 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, }; -- 2.20.1