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greybus: first framework for the es1 ap controller

This commit is contained in:
Greg Kroah-Hartman 2014-08-30 17:18:14 -07:00
parent 8bf23e84d7
commit f1eec30ac8
1 changed files with 23 additions and 0 deletions
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23
drivers/staging/greybus/es1-ap-usb.c
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@ -18,17 +18,40 @@ static const struct usb_device_id id_table[] = {
};
MODULE_DEVICE_TABLE(usb, id_table);
/*
* Hack, we "know" we will only have one of these at any one time, so only
* create one static structure pointer.
*/
struct es1_ap_dev {
struct usb_interface *usb_intf;
} *es1_ap_dev;
static int ap_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
if (es1_ap_dev) {
dev_err(&interface->dev, "Already have a es1_ap_dev???\n");
return -ENODEV;
}
es1_ap_dev = kzalloc(sizeof(*es1_ap_dev), GFP_KERNEL);
if (!es1_ap_dev)
return -ENOMEM;
es1_ap_dev->usb_intf = interface;
usb_set_intfdata(interface, es1_ap_dev);
return 0;
}
static void ap_disconnect(struct usb_interface *interface)
{
es1_ap_dev = usb_get_intfdata(interface);
/* Tear down everything! */
kfree(es1_ap_dev);
es1_ap_dev = NULL;
}