linux-kernel - [PATCH] ARM: dts: at91: ksz9477_evb: Add tx-internal-delay-ps property for port5

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Message-Id: <20230727080656.3828397-1-lukma@denx.de>
Date:   Thu, 27 Jul 2023 10:06:56 +0200
From:   Lukasz Majewski <lukma@...x.de>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Lukasz Majewski <lukma@...x.de>
Subject: [PATCH] ARM: dts: at91: ksz9477_evb: Add tx-internal-delay-ps property for port5

Without this change the KSZ9477 Evaluation board's Linux (v6.5-rc1) shows
following device warning:

'ksz-switch spi1.0: Port 5 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"'

This is not critical, as KSZ driver by itself assigns default value of
tx delay to 2000 ps (as 'rgmii-txid' is set as PHY mode).

However, to avoid extra warnings in logs - the missing 'tx-internal-delay-ps'
has been specified with the default value of 2000 ps.

Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
 arch/arm/boot/dts/microchip/at91-sama5d3_ksz9477_evb.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama5d3_ksz9477_evb.dts b/arch/arm/boot/dts/microchip/at91-sama5d3_ksz9477_evb.dts
index 99cd6d15998b..b66570080894 100644
--- a/arch/arm/boot/dts/microchip/at91-sama5d3_ksz9477_evb.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama5d3_ksz9477_evb.dts
@@ -152,6 +152,7 @@
 				label = "cpu";
 				ethernet = <&macb0>;
 				phy-mode = "rgmii-txid";
+				tx-internal-delay-ps = <2000>;
 
 				fixed-link {
 					speed = <1000>;
-- 
2.20.1