kernelconfig_penguin
CONFIG_ARCH_BITMAIN is not available for the default architecture x86.
Result is shown for architecture arm64
is selected by
CONFIG_PINCTRL_BM1880

Bitmain SoC Platforms

configname: CONFIG_ARCH_BITMAIN

Linux Kernel Configuration
└─> Platform selection
└─> Bitmain SoC Platforms

This enables support for the Bitmain SoC Family.