linux-kernel - Re: [PATCH 1/1] ARM:dts:aspeed: Initial device tree for AMD Onyx Platform

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Date: Fri, 1 Mar 2024 14:57:13 -0600
From: Supreeth Venkatesh <supvenka@....com>
To: Andrew Jeffery <andrew@...econstruct.com.au>,
 Supreeth Venkatesh <supreeth.venkatesh@....com>, joel@....id.au,
 andrew@...id.au, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org,
 linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org, robh+dt@...nel.org
Subject: Re: [PATCH 1/1] ARM:dts:aspeed: Initial device tree for AMD Onyx
 Platform


On 2/26/24 00:55, Andrew Jeffery wrote:
> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
>
>
> On Tue, 2024-01-09 at 21:35 -0600, Supreeth Venkatesh wrote:
>> This patch adds initial device tree and makefile updates for
>> AMD Onyx platform.
>>
>> AMD Onyx platform is an AMD customer reference board with an Aspeed
>> ast2600 BMC manufactured by AMD.
>> It describes I2c devices, Fans, Kcs devices, Uarts, Mac, LEDs, etc.
>> present on AMD Onyx platform.
>>
>> Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@....com>
>> ---
>>   arch/arm/boot/dts/aspeed/Makefile             |  1 +
>>   .../boot/dts/aspeed/aspeed-bmc-amd-onyx.dts   | 98 +++++++++++++++++++
>>   2 files changed, 99 insertions(+)
>>   create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-amd-onyx.dts
>>
>> diff --git a/arch/arm/boot/dts/aspeed/Makefile b/arch/arm/boot/dts/aspeed/Makefile
>> index fb9cc95f1b60..2b27d377aae2 100644
>> --- a/arch/arm/boot/dts/aspeed/Makefile
>> +++ b/arch/arm/boot/dts/aspeed/Makefile
>> @@ -5,6 +5,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
>>        aspeed-ast2600-evb.dtb \
>>        aspeed-bmc-amd-daytonax.dtb \
>>        aspeed-bmc-amd-ethanolx.dtb \
>> +     aspeed-bmc-amd-onyx.dtb \
>>        aspeed-bmc-ampere-mtjade.dtb \
>>        aspeed-bmc-ampere-mtmitchell.dtb \
>>        aspeed-bmc-arm-stardragon4800-rep2.dtb \
>> diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-amd-onyx.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-amd-onyx.dts
>> new file mode 100644
>> index 000000000000..a7056cd29553
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-amd-onyx.dts
>> @@ -0,0 +1,98 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>> +// Copyright (c) 2021 - 2024 AMD Inc.
>> +// Author: Supreeth Venkatesh <supreeth.venkatesh@....com>
>> +
>> +/dts-v1/;
>> +
>> +#include "aspeed-g6.dtsi"
>> +#include <dt-bindings/gpio/aspeed-gpio.h>
>> +
>> +/ {
>> +       model = "AMD Onyx BMC";
>> +       compatible = "amd,onyx-bmc", "aspeed,ast2600";
>> +
>> +       aliases {
>> +               serial0 = &uart1;
>> +               serial4 = &uart5;
>> +      };
>> +
>> +       chosen {
>> +               stdout-path = &uart5;
>> +               bootargs = "console=ttyS4,115200 earlyprintk vmalloc=512MB";
> Why `vmalloc=512MB`? Can you add a comment explaining the need for
> that?
>
> That said, setting bootargs in the devicetree is generally discouraged.
>
Thank you. will remove in v2.
>> +       };
>> +
>> +       memory@...00000 {
>> +               device_type = "memory";
>> +               reg = <0x80000000 0x80000000>;
>> +       };
>> +
>> +};
>> +
>> +&mdio0 {
>> +       status = "okay";
>> +
>> +       ethphy0: ethernet-phy@0 {
>> +               compatible = "ethernet-phy-ieee802.3-c22";
>> +               reg = <0>;
>> +       };
>> +};
>> +
>> +&mac3 {
>> +       status = "okay";
>> +       phy-mode = "rgmii";
>> +       phy-handle = <&ethphy0>;
>> +
>> +       pinctrl-names = "default";
>> +       pinctrl-0 = <&pinctrl_rgmii4_default>;
>> +};
>> +
>> +
>> +
>> +&fmc {
>> +       status = "okay";
>> +       flash@0 {
>> +               compatible = "jedec,spi-nor";
>> +               status = "okay";
>> +               #include "openbmc-flash-layout-128.dtsi"
>> +       };
>> +};
>> +
>> +//Host Console
>> +&uart1 {
>> +       status = "okay";
>> +};
> How are you managing the host console? Enabling UART1 for that on the
> BMC piques my interest :)
UART1 [BMC side] <-> UART 4 [Host side].
>
> Apologies for the delay in reviewing.
No problem. Thanks for reviewing. Sending v2 shortly.
>
> Andrew
>