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usb: core: hub: Create platform devices for onboard hubs in hub_probe()

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Call onboard_hub_create/destroy_pdevs() from hub_probe/disconnect()
to create/destroy platform devices for onboard USB hubs that may be
connected to the hub. The onboard hubs must have nodes in the
device tree.

onboard_hub_create/destroy_pdevs() are NOPs unless
CONFIG_USB_ONBOARD_HUB=y/m.

Also add a field to struct usb_hub to keep track of the onboard hub
platform devices that are owned by the hub.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20220630123445.v24.4.Ic9dd36078f9d803de82ca01a6700c58b8e4de27e@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthias Kaehlcke 2022-06-30 12:35:30 -07:00 committed by Greg Kroah-Hartman
parent 8bc063641c
commit 3a6bf4a081
2 changed files with 9 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/usb/core/hub.c
View file

@ -23,6 +23,7 @@
#include <linux/usb.h>
#include <linux/usbdevice_fs.h>
#include <linux/usb/hcd.h>
#include <linux/usb/onboard_hub.h>
#include <linux/usb/otg.h>
#include <linux/usb/quirks.h>
#include <linux/workqueue.h>
@ -1752,6 +1753,8 @@ static void hub_disconnect(struct usb_interface *intf)
if (hub->quirk_disable_autosuspend)
usb_autopm_put_interface(intf);
onboard_hub_destroy_pdevs(&hub->onboard_hub_devs);
kref_put(&hub->kref, hub_release);
}
@ -1869,6 +1872,7 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
INIT_DELAYED_WORK(&hub->leds, led_work);
INIT_DELAYED_WORK(&hub->init_work, NULL);
INIT_WORK(&hub->events, hub_event);
INIT_LIST_HEAD(&hub->onboard_hub_devs);
spin_lock_init(&hub->irq_urb_lock);
timer_setup(&hub->irq_urb_retry, hub_retry_irq_urb, 0);
usb_get_intf(intf);
@ -1889,8 +1893,11 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
usb_autopm_get_interface_no_resume(intf);
}
if (hub_configure(hub, &desc->endpoint[0].desc) >= 0)
if (hub_configure(hub, &desc->endpoint[0].desc) >= 0) {
onboard_hub_create_pdevs(hdev, &hub->onboard_hub_devs);
return 0;
}
hub_disconnect(intf);
return -ENODEV;

1
drivers/usb/core/hub.h
View file

@ -73,6 +73,7 @@ struct usb_hub {
spinlock_t irq_urb_lock;
struct timer_list irq_urb_retry;
struct usb_port **ports;
struct list_head onboard_hub_devs;
};
/**