增加支持hp & spk 自动切换

hc

2024-03-22 619f0f87159c5dbd2755b1b0a0eb35784be84e7a

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baudrate=115200
bootargs=root=/dev/mmcblk0p2 rootwait
bootcmd=fatload mmc 0:1; bootm
bootdelay=2
bootfile=uImage
loadaddr=0x82000000
stderr=serial0@f0005000
stdin=serial0@f0005000
stdout=serial0@f0005000