Commit c950686b authored by Matthias Kaehlcke's avatar Matthias Kaehlcke Committed by Greg Kroah-Hartman
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usb: host: xhci-plat: Create platform device for onboard hubs in probe() 



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: default avatarMatthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20210609150159.v12.4.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 412981e0

drivers/usb/host/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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.

drivers/usb/host/xhci-plat.c

+6 −0
Original line number Diff line number Diff line
@@ -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);

drivers/usb/host/xhci.h

+2 −0
Original line number Diff line number Diff line
@@ -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));