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

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Message-ID: <eae561e2-a600-4d68-994d-6f619a7c86b6@phytec.de>
Date: Mon, 26 May 2025 17:03:08 +0300
From: Wadim Egorov <w.egorov@...tec.de>
To: Vignesh Raghavendra <vigneshr@...com>, nm@...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: Re: [PATCH] arm64: dts: ti: k3-am642-phyboard-electra: Fix PRU-ICSSG
 Ethernet ports

Am 26.05.25 um 08:32 schrieb Vignesh Raghavendra:
> 
> 
> On 21/05/25 11:03, Wadim Egorov wrote:
>> 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.
>>
> 
> Should this patch have a Fixes tag then?

Yes,

Fixes: 87adfd1ab03a ("arm64: dts: ti: am642-phyboard-electra: Add 
PRU-ICSSG nodes")

> 
>> 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 {
>