Currently all UDC drivers are calling
device_register() before calling
usb_add_gadget_udc(). In order to avoid
code duplication, we can allow udc-core.c
register that device.
However that would become a really large patch,
so to cope with the meanwhile and allow us
to write bite-sized patches, we're adding
a flag which will be set by UDC driver once
it removes the code for registering the
gadget device.
Once all are converted, the new flag will
be removed.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/gadget/udc-core.c | 23 +++++++++++++++++++----
include/linux/usb/gadget.h | 4 ++++
2 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index 2a9cd36..9195054 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -173,6 +173,14 @@ int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget)
if (!udc)
goto err1;
+ if (gadget->register_my_device) {
+ dev_set_name(&gadget->dev, "gadget");
+
+ ret = device_register(&gadget->dev);
+ if (ret)
+ goto err2;
+ }
+
device_initialize(&udc->dev);
udc->dev.release = usb_udc_release;
udc->dev.class = udc_class;
@@ -180,7 +188,7 @@ int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget)
udc->dev.parent = parent;
ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj));
if (ret)
- goto err2;
+ goto err3;
udc->gadget = gadget;
@@ -189,18 +197,22 @@ int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget)
ret = device_add(&udc->dev);
if (ret)
- goto err3;
+ goto err4;
mutex_unlock(&udc_lock);
return 0;
-err3:
+
+err4:
list_del(&udc->list);
mutex_unlock(&udc_lock);
-err2:
+err3:
put_device(&udc->dev);
+err2:
+ if (gadget->register_my_device)
+ put_device(&gadget->dev);
err1:
return ret;
}
@@ -254,6 +266,9 @@ found:
kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
device_unregister(&udc->dev);
+
+ if (gadget->register_my_device)
+ device_unregister(&gadget->dev);
}
EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 2e297e8..fcd9ef8 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -494,6 +494,9 @@ struct usb_gadget_ops {
* only supports HNP on a different root port.
* @b_hnp_enable: OTG device feature flag, indicating that the A-Host
* enabled HNP support.
+ * @register_my_device: Flag telling udc-core that UDC driver didn't
+ * register the gadget device to the driver model. Temporary until
+ * all UDC drivers are fixed up properly.
* @name: Identifies the controller hardware type. Used in diagnostics
* and sometimes configuration.
* @dev: Driver model state for this abstract device.
@@ -531,6 +534,7 @@ struct usb_gadget {
unsigned b_hnp_enable:1;
unsigned a_hnp_support:1;
unsigned a_alt_hnp_support:1;
+ unsigned register_my_device:1;
const char *name;
struct device dev;
unsigned out_epnum;
--
1.8.1.rc1.5.g7e0651a
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