linux-kernel - [PATCH] ARM: dts: at91-sama5d27

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Date:   Wed, 17 Feb 2021 12:38:08 +0100
From:   <nicolas.ferre@...rochip.com>
To:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>
CC:     Claudiu Beznea <claudiu.beznea@...rochip.com>,
        <stable@...r.kernel.org>
Subject: [PATCH] ARM: dts: at91-sama5d27_som1: fix phy address to 7

From: Claudiu Beznea <claudiu.beznea@...rochip.com>

Fix the phy address to 7 for Ethernet PHY on SAMA5D27 SOM1. No
connection established if phy address 0 is used.

The board uses the 24 pins version of the KSZ8081RNA part, KSZ8081RNA
pin 16 REFCLK as PHYAD bit [2] has weak internal pull-down.  But at
reset, connected to PD09 of the MPU it's connected with an internal
pull-up forming PHYAD[2:0] = 7.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Fixes: 2f61929eb10a ("ARM: dts: at91: at91-sama5d27_som1: fix PHY ID")
Cc: Ludovic Desroches <ludovic.desroches@...rochip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
Cc: <stable@...r.kernel.org> # 4.14+
---
 arch/arm/boot/dts/at91-sama5d27_som1.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
index 1b1163858b1d..e3251f3e3eaa 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
+++ b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
@@ -84,8 +84,8 @@ macb0: ethernet@...08000 {
 				pinctrl-0 = <&pinctrl_macb0_default>;
 				phy-mode = "rmii";
 
-				ethernet-phy@0 {
-					reg = <0x0>;
+				ethernet-phy@7 {
+					reg = <0x7>;
 					interrupt-parent = <&pioA>;
 					interrupts = <PIN_PD31 IRQ_TYPE_LEVEL_LOW>;
 					pinctrl-names = "default";
-- 
2.30.0