arm64: dts: ti: k3-am62a: Disable USB LPM

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>
Reviewed-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
Link: https://lore.kernel.org/r/20240412-for-v6-10-am62-usb-typec-dt-v7-3-93b827adf97e@kernel.org
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
index 31fc59b02f21a957988c5ba4890b4c959af49007..3fd59283eafe25de6c2d5c987dd06ee611f42881 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
@@ -622,6 +622,8 @@
                        interrupt-names = "host", "peripheral";
                        maximum-speed = "high-speed";
                        dr_mode = "otg";
+                       snps,usb2-gadget-lpm-disable;
+                       snps,usb2-lpm-disable;
                };
        };
 
@@ -646,6 +648,8 @@
                        interrupt-names = "host", "peripheral";
                        maximum-speed = "high-speed";
                        dr_mode = "otg";
+                       snps,usb2-gadget-lpm-disable;
+                       snps,usb2-lpm-disable;
                };
        };