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path: root/drivers/usb/host/xhci-hub.c
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Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
-rw-r--r--drivers/usb/host/xhci-hub.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 7b01094d799..74bfc868b7a 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -544,12 +544,18 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
if (hcd->speed != HCD_USB3)
goto error;
+ /* Set the U1 and U2 exit latencies. */
memcpy(buf, &usb_bos_descriptor,
USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
buf[12] = HCS_U1_LATENCY(temp);
put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);
+ /* Indicate whether the host has LTM support. */
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+ if (HCC_LTC(temp))
+ buf[8] |= USB_LTM_SUPPORT;
+
spin_unlock_irqrestore(&xhci->lock, flags);
return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
case GetPortStatus: