If an interface has an associated devicetree node with status disabled,
do not register the device. This is useful for boards with a built-in
multifunction USB device where some functions are broken or otherwise
undesired.
Signed-off-by: Mans Rullgard <m...@mansr.com>
---
Changed in v2:
- print message about skipped interfaces
---
drivers/usb/core/message.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index bfa5eda0cc26..46bf79bc03ad 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -2007,6 +2007,13 @@ int usb_set_configuration(struct usb_device *dev, int
configuration)
for (i = 0; i < nintf; ++i) {
struct usb_interface *intf = cp->interface[i];
+ if (intf->dev.of_node &&
+ !of_device_is_available(intf->dev.of_node)) {
+ dev_info(&dev->dev, "skipping disabled interface %d\n",
+ intf->cur_altsetting->desc.bInterfaceNumber);
+ continue;
+ }
+
dev_dbg(&dev->dev,
"adding %s (config #%d, interface %d)\n",
dev_name(&intf->dev), configuration,
--
2.20.1
