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usb: core: hcd: Create platform devices for onboard hubs in probe()

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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: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20220217104219.v21.3.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthias Kaehlcke 2022-02-17 10:42:54 -08:00 committed by Greg Kroah-Hartman
parent 0298b4b95c
commit c40b62216c
2 changed files with 7 additions and 0 deletions
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6
drivers/usb/core/hcd.c
View File

@ -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);

1
include/linux/usb/hcd.h
View File

@ -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];