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From: Roger Quadros <rogerq@kernel.org>
Date: Mon, 26 Feb 2024 14:03:10 +0200
Subject: [PATCH v6 4/4] arm64: dts: ti: k3-am62a: Disable USB LPM
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Message-Id: <20240226-b4-for-v6-5-am62-usb-typec-dt-v6-4-acf77fff4344@kernel.org>
References: <20240226-b4-for-v6-5-am62-usb-typec-dt-v6-0-acf77fff4344@kernel.org>
In-Reply-To: <20240226-b4-for-v6-5-am62-usb-typec-dt-v6-0-acf77fff4344@kernel.org>
To: Lee Jones <lee@kernel.org>, Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>, Nishanth Menon <nm@ti.com>, 
 Vignesh Raghavendra <vigneshr@ti.com>, Tero Kristo <kristo@kernel.org>
Cc: Andrew Davis <afd@ti.com>, b-liu@ti.com, srk@ti.com, 
 r-gunasekaran@ti.com, devicetree@vger.kernel.org, 
 linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
 Roger Quadros <rogerq@kernel.org>

As per AM62A TRM [1] USB Link Power Management (LPM)
feature is not supported. Disable it else it may
cause enumeration failure on some devices.

> 4.9.2.1 USB2SS Unsupported Features
> The following features are not supported on this family of devices:
> ...
> - USB 2.0 ECN: Link Power Management (LPM)
> ...

[1] - https://www.ti.com/lit/pdf/spruj16

Signed-off-by: Roger Quadros <rogerq@kernel.org>
---
Changelog:
v6 - Rebased on next-20240226
v5 - new patch
---
 arch/arm64/boot/dts/ti/k3-am62a-main.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
index a158df0d0ba6..adaf578280f9 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
@@ -621,6 +621,8 @@ usb0: usb@31000000 {
 			interrupt-names = "host", "peripheral";
 			maximum-speed = "high-speed";
 			dr_mode = "otg";
+			snps,usb2-gadget-lpm-disable;
+			snps,usb2-lpm-disable;
 		};
 	};
 
@@ -644,6 +646,8 @@ usb1: usb@31100000 {
 			interrupt-names = "host", "peripheral";
 			maximum-speed = "high-speed";
 			dr_mode = "otg";
+			snps,usb2-gadget-lpm-disable;
+			snps,usb2-lpm-disable;
 		};
 	};
 

-- 
2.34.1