linux-kernel - Re: [PATCH] arm64: dts: meson-g12a-x96-max: Add Gigabit Ethernet Support

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Message-ID: <90bad489-4186-08c9-8073-b3eafce273e4@baylibre.com>
Date:   Tue, 21 May 2019 10:35:00 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     khilman@...libre.com, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: dts: meson-g12a-x96-max: Add Gigabit Ethernet
 Support

Hi,

On 20/05/2019 19:49, Martin Blumenstingl wrote:
> Hi Neil,
> 
> On Mon, May 20, 2019 at 3:43 PM Neil Armstrong <narmstrong@...libre.com> wrote:
>>
>> Enable the network interface of the X96 Mac using an external
>> Realtek RTL8211F gigabit PHY, needing the same broken-eee properties
>> as the previous Amlogic SoC generations.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> ---
>>  .../boot/dts/amlogic/meson-g12a-x96-max.dts   | 22 +++++++++++++++++++
>>  1 file changed, 22 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a-x96-max.dts b/arch/arm64/boot/dts/amlogic/meson-g12a-x96-max.dts
>> index 5cdc263b03e6..5ca79109c250 100644
>> --- a/arch/arm64/boot/dts/amlogic/meson-g12a-x96-max.dts
>> +++ b/arch/arm64/boot/dts/amlogic/meson-g12a-x96-max.dts
>> @@ -15,6 +15,7 @@
>>
>>         aliases {
>>                 serial0 = &uart_AO;
>> +               ethernet0 = &ethmac;
>>         };
>>         chosen {
>>                 stdout-path = "serial0:115200n8";
>> @@ -150,6 +151,27 @@
>>         pinctrl-names = "default";
>>  };
>>
>> +&ext_mdio {
>> +       external_phy: ethernet-phy@0 {
>> +               /* Realtek RTL8211F (0x001cc916) */
>> +               reg = <0>;
>> +               max-speed = <1000>;
>> +               eee-broken-1000t;
> do we still need eee-broken-1000t? there are only 2 boards left which
> set it and I'm not sure whether those still need it after Carlo's
> fixes

In our tests, this boards really needs it... otherwise the network stalls
pretty quickly. I'd prefer to avoid it but seems it's necessary.

> 
>> +       };
>> +};
>> +
>> +&ethmac {
>> +       pinctrl-0 = <&eth_rmii_pins>, <&eth_rgmii_pins>;
> Jerome renamed "eth_rmii_pins" to "eth_pins" in v2 of his Ethernet
> pinctrl patch: [0]
> you missed his update only by a few minutes


Damn...
Thx.

Neil

> 
> 
> Martin
> 
> 
> [0] https://patchwork.kernel.org/patch/10951103/
>