From 649f5c842ba3acfe6a06a36229759f328e98508a Mon Sep 17 00:00:00 2001 From: Sandeep Maheswaram Date: Mon, 13 Jun 2022 10:00:51 +0530 Subject: [PATCH] usb: dwc3: core: Host wake up support from system suspend Check wakeup-source property for dwc3 core node to set the wakeup capability. Drop the device_init_wakeup call from runtime suspend and resume. If the dwc3 is wakeup capable, don't power down the USB PHY(s). The glue drivers are expected to take care of configuring the additional wakeup settings if needed based on the dwc3 wakeup capability status. In some SOC designs, powering off the PHY is resulting in higher leakage, so this patch save power on such boards. Reviewed-by: Pavankumar Kondeti Signed-off-by: Sandeep Maheswaram Signed-off-by: Krishna Kurapati Link: https://lore.kernel.org/r/1655094654-24052-3-git-send-email-quic_kriskura@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/core.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 3d716c7..050b2ba 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1817,6 +1817,7 @@ static int dwc3_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dwc); dwc3_cache_hwparams(dwc); + device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source")); spin_lock_init(&dwc->lock); mutex_init(&dwc->mutex); @@ -1978,7 +1979,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) dwc3_core_exit(dwc); break; case DWC3_GCTL_PRTCAP_HOST: - if (!PMSG_IS_AUTO(msg)) { + if (!PMSG_IS_AUTO(msg) && !device_can_wakeup(dwc->dev)) { dwc3_core_exit(dwc); break; } @@ -2039,7 +2040,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) spin_unlock_irqrestore(&dwc->lock, flags); break; case DWC3_GCTL_PRTCAP_HOST: - if (!PMSG_IS_AUTO(msg)) { + if (!PMSG_IS_AUTO(msg) && !device_can_wakeup(dwc->dev)) { ret = dwc3_core_init_for_resume(dwc); if (ret) return ret; @@ -2116,8 +2117,6 @@ static int dwc3_runtime_suspend(struct device *dev) if (ret) return ret; - device_init_wakeup(dev, true); - return 0; } @@ -2126,8 +2125,6 @@ static int dwc3_runtime_resume(struct device *dev) struct dwc3 *dwc = dev_get_drvdata(dev); int ret; - device_init_wakeup(dev, false); - ret = dwc3_resume_common(dwc, PMSG_AUTO_RESUME); if (ret) return ret; -- 2.7.4