你好，
下面是启动的log：
DRA722-GP ES2.1
config start...
Card did not respond to voltage select!
Firmware loading failed
[arch/arm/mach-omap2/boot-common.c|spl_boot_ipu:287]
Card did not respond to voltage select!
Firmware loading failed
[arch/arm/mach-omap2/boot-common.c|spl_boot_ipu:320]
Trying to boot from MMC1
Card did not respond to voltage select!
spl: mmc init failed with error: -95
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###
请问这个问题是怎么出现的，该怎么解决呢？
