Commit c40b6221 authored by Matthias Kaehlcke's avatar Matthias Kaehlcke Committed by Greg Kroah-Hartman
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usb: core: hcd: Create platform devices for onboard hubs in probe() 



Call onboard_hub_create/destroy_pdevs() from usb_add/remove_hcd()
for primary HCDs to create/destroy platform devices for onboard
USB hubs that may be connected to the root hub of the controller.
These functions are a NOP unless CONFIG_USB_ONBOARD_HUB=y/m.

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

Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Signed-off-by: default avatarMatthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20220217104219.v21.3.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0298b4b9

drivers/usb/core/hcd.c

+6 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/phy/phy.h>

#include <linux/usb.h>

#include <linux/usb/hcd.h>

#include <linux/usb/onboard_hub.h>

#include <linux/usb/otg.h>



#include "usb.h"
@@ -2984,6 +2985,9 @@ int usb_add_hcd(struct usb_hcd *hcd, 
	if (hcd->uses_new_polling && HCD_POLL_RH(hcd))

		usb_hcd_poll_rh_status(hcd);



	if (usb_hcd_is_primary_hcd(hcd))

		onboard_hub_create_pdevs(hcd->self.root_hub, &hcd->onboard_hub_devs);



	return retval;



err_register_root_hub:
@@ -3062,6 +3066,8 @@ void usb_remove_hcd(struct usb_hcd *hcd) 
	if (usb_hcd_is_primary_hcd(hcd)) {

		if (hcd->irq > 0)

			free_irq(hcd->irq, hcd);



		onboard_hub_destroy_pdevs(&hcd->onboard_hub_devs);

	}



	usb_deregister_bus(&hcd->self);

include/linux/usb/hcd.h

+1 −0
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ struct usb_hcd { 
	struct usb_hcd		*shared_hcd;

	struct usb_hcd		*primary_hcd;



	struct list_head	onboard_hub_devs;



#define HCD_BUFFER_POOLS	4

	struct dma_pool		*pool[HCD_BUFFER_POOLS];