Linux Kernels

usb: dwc2: host: ignore wakeup interrupt if hibernation supported

This change “usb: dwc2: host: ignore wakeup interrupt if hibernation supported” (commit 6e74162) in Linux kernel is authored by Gregory Herrero <gregory.herrero [at] intel.com> on Tue Sep 22 15:16:43 2015 +0200.

Description of "usb: dwc2: host: ignore wakeup interrupt if hibernation supported"

The change “usb: dwc2: host: ignore wakeup interrupt if hibernation supported” introduces changes as follows.

usb: dwc2: host: ignore wakeup interrupt if hibernation supported

If hibernation is supported, resume of devices will be handled in
bus_resume callback.

Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Linux kernel releases containing commit 6e74162

The Linux kernel releases containing this commit are as follows.

Linux kernel code changes from "usb: dwc2: host: ignore wakeup interrupt if hibernation supported"

There are 4 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 drivers/usb/dwc2/core_intr.c | 4 ++++
 1 file changed, 4 insertions(+)
 
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 3275310a8fb3..d8a5400a2d2d 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -356,6 +356,10 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 		/* Change to L0 state */
 		hsotg->lx_state = DWC2_L0;
 	} else {
+		if (hsotg->core_params->hibernation) {
+			dwc2_writel(GINTSTS_WKUPINT, hsotg->regs + GINTSTS);
+			return;
+		}
 		if (hsotg->lx_state != DWC2_L1) {
 			u32 pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);
 

The commit for this change in Linux stable tree is 6e74162 (patch).

Last modified: 2020/01/11 09:48