usb: dwc3: enable hibernation if to be supported

It enables hibernation if the function is set in coreConsultant.

Suggested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index fa396fc..2f7aecc 100644 (file)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -449,6 +449,12 @@ static int dwc3_core_init(struct dwc3 *dwc)
        case DWC3_GHWPARAMS1_EN_PWROPT_HIB:
                /* enable hibernation here */
                dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4);
+
+               /*
+                * REVISIT Enabling this bit so that host-mode hibernation
+                * will work. Device-mode hibernation is not yet implemented.
+                */
+               reg |= DWC3_GCTL_GBLHIBERNATIONEN;
                break;
        default:
                dev_dbg(dwc->dev, "No power optimization available\n");