Cross-compiling the kernel to include usb-serial support

VisionFive 2 （English Forum)
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FYI: You may also be able to access the running kernel config on a system (but only if the kernel was compiled with CONFIG_IKCONFIG and CONFIG_IKCONFIG_PROC), by using something like the following:

mzs@tock:~ $ zcat /proc/config.gz | grep PPS
gzip: /proc/config.gz: No such file or directory
mzs@tock:~ $ sudo modprobe configs
mzs@tock:~ $ zcat /proc/config.gz | grep PPS
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set
# PPS clients support
# CONFIG_PPS_CLIENT_KTIMER is not set
CONFIG_PPS_CLIENT_LDISC=m
CONFIG_PPS_CLIENT_GPIO=m
# PPS generators support
mzs@tock:~ $ sudo modprobe -r configs

(can also be accessed as /proc/.config)

Some distributions put copy of the config used in /boot

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