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LS1043A blow fuse from u-boot

Question asked by Alexandre BERDERY on Mar 27, 2018
Latest reply on Mar 30, 2018 by alexander.yakovlev



I'm currently working with a LS1043a based platform (miriac™ MPX-LS1043A ) with no possibility today to solder a JTAG connector. As far as I understand different documentations I read (QorIQ LS1043A Reference Manual and QorIQ SDK V2.0-1703 Documentation) only Code Warrior usage through JTAG is documented for fuse blowing. 


I correctly managed to write and check SFP mirror registers from U-boot during a shell runtime session, but I guess I'm missing PROG_SFP signal handling (aka POVDD ?) so that after platform reset , SFP mirror is logically back to previous original state.


Is there any way to manage enabling of fuse programming with U-boot ? Any "software" way to set PROG_SFP high during U-boot operation or is it expected to be board manufacturer providing explicit h/w switches to do so ?


Thanks in advance,