Commit ae3a3e20 authored by Felipe Balbi's avatar Felipe Balbi Committed by Greg Kroah-Hartman
Browse files

usb: dwc3: host: pass quirk-broken-port-ped property for known broken revisions 



[ Upstream commit e42a5dbb ]

dwc3 revisions <=3.00a have a limitation where Port Disable command
doesn't work. Set the quirk-broken-port-ped property for such
controllers so XHCI core can do the necessary workaround.

[rogerq@ti.com] Updated code from platform data to device property.

Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7bdf7beb

drivers/usb/dwc3/host.c

+18 −3
Original line number Diff line number Diff line
@@ -21,11 +21,12 @@ 


int dwc3_host_init(struct dwc3 *dwc)

{

	struct property_entry	props[2];

	struct property_entry	props[3];

	struct platform_device	*xhci;

	int			ret, irq;

	struct resource		*res;

	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);

	int			prop_idx = 0;



	irq = platform_get_irq_byname(dwc3_pdev, "host");

	if (irq == -EPROBE_DEFER)
@@ -89,8 +90,22 @@ int dwc3_host_init(struct dwc3 *dwc) 


	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));



	if (dwc->usb3_lpm_capable) {

		props[0].name = "usb3-lpm-capable";

	if (dwc->usb3_lpm_capable)

		props[prop_idx++].name = "usb3-lpm-capable";



	/**

	 * WORKAROUND: dwc3 revisions <=3.00a have a limitation

	 * where Port Disable command doesn't work.

	 *

	 * The suggested workaround is that we avoid Port Disable

	 * completely.

	 *

	 * This following flag tells XHCI to do just that.

	 */

	if (dwc->revision <= DWC3_REVISION_300A)

		props[prop_idx++].name = "quirk-broken-port-ped";



	if (prop_idx) {

		ret = platform_device_add_properties(xhci, props);

		if (ret) {

			dev_err(dwc->dev, "failed to add properties to xHCI\n");