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usb: host: xhci-plat: Create platform device for onboard hubs in probe()

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Call onboard_hub_create/destroy_pdevs() from  _probe()/_remove()
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 xhci_hcd to keep track of the onboard hub
platform devices that are owned by the xHCI.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20210609150159.v12.4.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthias Kaehlcke 2021-06-09 15:02:48 -07:00 committed by Greg Kroah-Hartman
parent 412981e062
commit c950686b38
3 changed files with 9 additions and 0 deletions
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1
drivers/usb/host/Kconfig
View file

@ -54,6 +54,7 @@ config USB_XHCI_PCI_RENESAS
config USB_XHCI_PLATFORM
tristate "Generic xHCI driver for a platform device"
select USB_XHCI_RCAR if ARCH_RENESAS
depends on USB_ONBOARD_HUB || !USB_ONBOARD_HUB
help
Adds an xHCI host driver for a generic platform device, which
provides a memory space and an irq.

6
drivers/usb/host/xhci-plat.c
View file

@ -15,6 +15,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/usb/onboard_hub.h>
#include <linux/usb/phy.h>
#include <linux/slab.h>
#include <linux/acpi.h>
@ -374,6 +375,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
*/
pm_runtime_forbid(&pdev->dev);
INIT_LIST_HEAD(&xhci->onboard_hub_devs);
onboard_hub_create_pdevs(hcd->self.root_hub, &xhci->onboard_hub_devs);
return 0;
@ -420,6 +424,8 @@ static int xhci_plat_remove(struct platform_device *dev)
usb_remove_hcd(hcd);
usb_put_hcd(shared_hcd);
onboard_hub_destroy_pdevs(&xhci->onboard_hub_devs);
clk_disable_unprepare(clk);
clk_disable_unprepare(reg_clk);
usb_put_hcd(hcd);

2
drivers/usb/host/xhci.h
View file

@ -1920,6 +1920,8 @@ struct xhci_hcd {
struct dentry *debugfs_slots;
struct list_head regset_list;
struct list_head onboard_hub_devs;
void *dbc;
/* platform-specific data -- must come last */
unsigned long priv[] __aligned(sizeof(s64));