linux-kernel - [PATCH 1/2] usb: host: xhci-plat: Add quirk-no-64-bit-support

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Date:   Tue, 31 Oct 2023 04:40:20 +0000
From:   Naveen Kumar <mnkumar@...gle.com>
To:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        royluo@...gle.com, Naveen Kumar M <mnkumar@...gle.com>
Subject: [PATCH 1/2] usb: host: xhci-plat: Add quirk-no-64-bit-support

From: Naveen Kumar M <mnkumar@...gle.com>

This patch exposes the existing quirk XHCI_NO_64BIT_SUPPORT so that dwc3
clients can also use this flag. Despite HCCPARAMS1 being set to 1 some
clients may not support 64 bit addressing.

Signed-off-by: Naveen Kumar M <mnkumar@...gle.com>
---
 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 b93161374293..d5f37decb7da 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -249,6 +249,9 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s
 		if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))
 			xhci->quirks |= XHCI_BROKEN_PORT_PED;
 
+		if (device_property_read_bool(tmpdev, "quirk-no-64-bit-support"))
+			xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
+
 		device_property_read_u32(tmpdev, "imod-interval-ns",
 					 &xhci->imod_interval);
 	}
-- 
2.42.0.820.g83a721a137-goog