嵌入式 bootargs mtd自动分区的设置
内核mtd子模块 需要开启 cmdline partition parse的支持

bootargs 要配置正确的分区表
uboot#
setenv bootargs console=ttyS0,115200 root=/dev/mtdblock2 rootfstype=jffs2 init=/init mem=64M mtdparts=spi0.0:704k(boot),2048k(kernel),2432k(rootfs),1664k(drv),-(app)
uboot#
sa
uboot#
reset
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