Configure maximum speed for the switch PHYs according to the electrical
connections from PHY to RJ45 connector.

Signed-off-by: Ian Ray <ian.ray@gehealthcare.com>
---
 arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi b/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi
index 1e2266a2368b..2c8d2ab8cda1 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi
@@ -124,24 +124,28 @@ switchphy0: switchphy@0 {
 					reg = <0>;
 					interrupt-parent = <&switch>;
 					interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy1: switchphy@1 {
 					reg = <1>;
 					interrupt-parent = <&switch>;
 					interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy2: switchphy@2 {
 					reg = <2>;
 					interrupt-parent = <&switch>;
 					interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy3: switchphy@3 {
 					reg = <3>;
 					interrupt-parent = <&switch>;
 					interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy4: switchphy@4 {
-- 
2.49.0

On Tue, Feb 17, 2026 at 02:59:48PM +0200, Ian Ray wrote:
> Configure maximum speed for the switch PHYs according to the electrical
> connections from PHY to RJ45 connector.

Are you saying only 2 of the 4 pairs are connected to the RJ45
connector? And i assume you are using a 1G capable PHY?

> +					max-speed = <100>; /* only 100Mbit/s lanes are routed */

lanes generally refer to SERDES interfaces. For twisted pairs we use
pairs.

	Andrew

On Tue, Feb 17, 2026 at 03:53:08PM +0100, Andrew Lunn wrote:
> CAUTION: This email originated from outside of GE HealthCare. Only open links or attachments if you trust the sender. Report suspicious emails using Outlook’s “Report” button.
> 
> On Tue, Feb 17, 2026 at 02:59:48PM +0200, Ian Ray wrote:
> > Configure maximum speed for the switch PHYs according to the electrical
> > connections from PHY to RJ45 connector.
> 
> Are you saying only 2 of the 4 pairs are connected to the RJ45
> connector? And i assume you are using a 1G capable PHY?

That's right.

> 
> > +                                     max-speed = <100>; /* only 100Mbit/s lanes are routed */
> 
> lanes generally refer to SERDES interfaces. For twisted pairs we use
> pairs.

Thanks for the clarification: I will send a V3 in two weeks time.

> 
>         Andrew