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Commit e7113fbc authored by Hemant Kumar's avatar Hemant Kumar
Browse files

usb: host: Add support for usb core indexing 



Unique usb core id is used to differentiate between
different usb controllers.

Change-Id: Ibd886f704e7ecedfbf035b8e5adea2852ddf25bf
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent c70d827b

Documentation/devicetree/bindings/usb/dwc3.txt

+1 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ Optional properties: 
	gating. Default it is enabled.

 - snps,xhci-imod-value: Interrupt moderation interval for host mode

	(in increments of 250nsec).

 - usb-core-id: Differentiates between different controllers present on a device.



This is usually a subnode to DWC3 glue to which it is connected.

drivers/usb/host/xhci-plat.c

+3 −0
Original line number Diff line number Diff line
@@ -316,6 +316,9 @@ static int xhci_plat_probe(struct platform_device *pdev) 
	if (device_property_read_u32(sysdev, "snps,xhci-imod-value", &imod))

		imod = 0;



	if (device_property_read_u32(sysdev, "usb-core-id", &xhci->core_id))

		xhci->core_id = -EINVAL;



	hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);

	if (IS_ERR(hcd->usb_phy)) {

		ret = PTR_ERR(hcd->usb_phy);

drivers/usb/host/xhci.h

+2 −0
Original line number Diff line number Diff line
@@ -1538,6 +1538,8 @@ struct xhci_hcd { 
	/* secondary interrupter */

	struct	xhci_intr_reg __iomem **sec_ir_set;



	int		core_id;



	/* Cached register copies of read-only HC data */

	__u32		hcs_params1;

	__u32		hcs_params2;