[PATCH] ARM: imx: imx8mn-ddr4-evk: Add ethernet support

[Marek Vasut]

On 2/27/21 8:54 AM, Jagan Teki wrote:
> Hi Marek,
> 
> On Sat, Feb 27, 2021 at 3:44 AM Marek Vasut <marex at denx.de> wrote:
>>
>> Add support for ethernet on the imx8mn-ddr4-evk.
>>
>> Signed-off-by: Marek Vasut <marex at denx.de>
>> Cc: Fabio Estevam <festevam at gmail.com>
>> Cc: Peng Fan <peng.fan at nxp.com>
>> Cc: Stefano Babic <sbabic at denx.de>
>> ---
>>   arch/arm/dts/imx8mn-evk.dtsi            |  1 +
>>   board/freescale/imx8mn_evk/imx8mn_evk.c | 41 +++++++++++++++++++++++--
>>   configs/imx8mn_ddr4_evk_defconfig       |  8 +++++
>>   3 files changed, 47 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm/dts/imx8mn-evk.dtsi b/arch/arm/dts/imx8mn-evk.dtsi
>> index 76d042a4cf0..416fadb22b1 100644
>> --- a/arch/arm/dts/imx8mn-evk.dtsi
>> +++ b/arch/arm/dts/imx8mn-evk.dtsi
>> @@ -53,6 +53,7 @@
>>          pinctrl-0 = <&pinctrl_fec1>;
>>          phy-mode = "rgmii-id";
>>          phy-handle = <&ethphy0>;
>> +       phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
> 
> I believe this is phy reset-gpio to be part of mdio child node. any
> idea why it added in fec1 node?

Try $ git grep phy-reset drivers/net/ , that should clarify it all.
In short, FEC in U-Boot still uses legacy bindings.