linux-kernel - [PATCH] arm64: dts: ti: k3-am642-phyboard-electra: Fix PRU-ICSSG Ethernet ports

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Message-ID: <20250521053339.1751844-1-w.egorov@phytec.de>
Date: Wed, 21 May 2025 07:33:39 +0200
From: Wadim Egorov <w.egorov@...tec.de>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <upstream@...ts.phytec.de>
Subject: [PATCH] arm64: dts: ti: k3-am642-phyboard-electra: Fix PRU-ICSSG Ethernet ports

For the ICSSG PHYs to operate correctly, a 25 MHz reference clock must
be supplied on CLKOUT0. Previously, our bootloader configured this
clock, which is why the PRU Ethernet ports appeared to work, but the
change never made it into the device tree.

Add clock properties to make EXT_REFCLK1.CLKOUT0 output a 25MHz clock.

Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
---
 arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
index f63c101b7d61..129524eb5b91 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
@@ -322,6 +322,8 @@ AM64X_IOPAD(0x0040, PIN_OUTPUT, 7)	/* (U21) GPMC0_AD1.GPIO0_16 */
 &icssg0_mdio {
 	pinctrl-names = "default";
 	pinctrl-0 = <&icssg0_mdio_pins_default &clkout0_pins_default>;
+	assigned-clocks = <&k3_clks 157 123>;
+	assigned-clock-parents = <&k3_clks 157 125>;
 	status = "okay";
 
 	icssg0_phy1: ethernet-phy@1 {
-- 
2.34.1