Ask a few questions about openbmc, please help me to answer, thank you.

Ask a few questions about openbmc, please help me to answer, thank you.

[zhouyuanqing8]

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Hi,

    My name is Harley, and I am from China. I am currently developing an openbmc project based on the AST2500 chip. This is my first time doing openbmc. I used to understand uboot, kernel and bmc.
    Regarding the openbmc project, I would like to ask a few questions, and there will be many questions to consult everyone in the future, thank you very much.

1、About RGMII mode setting of MAC0
The current openbmc project and uboot code support 2 modes: MAC0 uses NCSI, MAC2 uses RGMII, but my board uses MAC0 RGMII. How can I simply configure this to complete this work, or do I have to modify aspeednic.c through the patch file.
uboot:
[cid:7975c2e4-572c-448b-a67d-484b1b670cca]

[cid:ec505265-25e1-4eaf-b5ac-5871001463ce]
meta-phosphor/aspeed-layer/recipes-bsp/u-boot/files:
[cid:526d3cd9-0259-463b-ab2d-8393f9ba3153]

2、There are lot of recipes, How does bitbake choose specific recipes? I read the manual of bitbake and the project of openbmc, and I didn't find a way to choose. openbmc has many recipes, we can't use them all。
openbmc/openbmc/meta-phosphor
[cid:071845c5-c628-406f-b7af-5078f5a08f69]
openbmc/meta-phosphor/recipes-phosphor
[cid:d45256e4-84ee-4223-b5f9-5778c3befac0]

3、There are many common recipes under openbmc / meta-phosphor, is there any documentation about the architecture and detailed implementation principles of each recipe? For example, chassis power control.

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