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>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index fa396fc57a85..2f7aecc620e7 100644
--- 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");