linux-kernel - [PATCH 2/2] usb: dwc3-am62: support ti,lane-reverse property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250908162052.355341-3-richard.genoud@bootlin.com>
Date: Mon,  8 Sep 2025 18:20:52 +0200
From: Richard Genoud <richard.genoud@...tlin.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>
Cc: Aswath Govindraju <a-govindraju@...com>,
	linux-usb@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Richard Genoud <richard.genoud@...tlin.com>
Subject: [PATCH 2/2] usb: dwc3-am62: support ti,lane-reverse property

Support the ti,lane-reverse property by setting the
USBSS_PHY_LANE_REVERSE bit.
This way, D+ line become D- and vice and versa.

Tested on am625 SoC.

Signed-off-by: Richard Genoud <richard.genoud@...tlin.com>
---
 drivers/usb/dwc3/dwc3-am62.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c
index 9db8f3ca493d..9437d2246ee9 100644
--- a/drivers/usb/dwc3/dwc3-am62.c
+++ b/drivers/usb/dwc3/dwc3-am62.c
@@ -119,6 +119,7 @@ struct dwc3_am62 {
 	struct regmap *syscon;
 	unsigned int offset;
 	unsigned int vbus_divider;
+	unsigned int lane_reverse;
 	u32 wakeup_stat;
 	void __iomem *phy_regs;
 };
@@ -203,6 +204,9 @@ static int dwc3_ti_init(struct dwc3_am62 *am62)
 	if (am62->vbus_divider)
 		reg |= 1 << USBSS_PHY_VBUS_SEL_SHIFT;
 
+	if (am62->lane_reverse)
+		reg |= USBSS_PHY_LANE_REVERSE;
+
 	dwc3_ti_writel(am62, USBSS_PHY_CONFIG, reg);
 
 	clk_prepare_enable(am62->usb2_refclk);
@@ -264,6 +268,7 @@ static int dwc3_ti_probe(struct platform_device *pdev)
 	}
 
 	am62->vbus_divider = device_property_read_bool(dev, "ti,vbus-divider");
+	am62->lane_reverse = device_property_read_bool(dev, "ti,lane-reverse");
 
 	ret = dwc3_ti_init(am62);
 	if (ret)