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From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Felipe Balbi <balbi@kernel.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Doug Anderson <dianders@chromium.org>,
	Matthias Kaehlcke <mka@chromium.org>,
	Mathias Nyman <mathias.nyman@intel.com>
Cc: <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<quic_pkondeti@quicinc.com>, <quic_ppratap@quicinc.com>,
	Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Subject: [PATCH v4] usb: host: xhci-plat: Set XHCI_SKIP_PHY_INIT quirk for DWC3 controller
Date: Fri, 17 Dec 2021 12:39:57 +0530	[thread overview]
Message-ID: <1639724997-21809-1-git-send-email-quic_c_sanm@quicinc.com> (raw)

Set XHCI_SKIP_PHY_INIT quirk to avoid phy initialization twice.
Runtime suspend of phy drivers was failing from DWC3 driver as runtime
usage value is 2 because the phy is initialized from DWC3 and HCD core.
DWC3 manages phy in their core drivers. Set this quirk to avoid phy
initialization in HCD core.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
---
v4:
Changed pdev->dev.parent->of_node to sysdev->of_node

 drivers/usb/host/xhci-plat.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c1edcc9..1a57573 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -327,6 +327,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
 					 &xhci->imod_interval);
 	}
 
+	if (of_device_is_compatible(sysdev->of_node, "snps,dwc3"))
+		xhci->quirks |= XHCI_SKIP_PHY_INIT;
+
 	hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);
 	if (IS_ERR(hcd->usb_phy)) {
 		ret = PTR_ERR(hcd->usb_phy);
-- 
2.7.4


             reply	other threads:[~2021-12-17  7:10 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-17  7:09 Sandeep Maheswaram [this message]
2021-12-17  9:55 ` [PATCH v4] usb: host: xhci-plat: Set XHCI_SKIP_PHY_INIT quirk for DWC3 controller Greg Kroah-Hartman

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