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→eFuses programming
u-boot=>
==== eFuses eFuse programming ====U-Boot uses the <code>fuse prog</code> command for writing the MAC address into the eFuse. The MAC address should be divided in high 16 bit and low 32 bits, for example MAC address <code>AB:CD:12:34:56:78</code>:
* (in case of presence) clear the <code>ethaddr</code> u-boot variable
<pre class="workstation-terminal">
* program the MAC address in the OPTs with the following commands:
<pre class="workstation-terminal">
u-boot=> fuse prog 9 0 C21EAFCDc21eafcd
Programming bank 9 word 0x00000000 to 0xc21eafcd...
Warning: Programming fuses is an irreversible operation!
y
u-boot=>
</pre>
If you want to write the eFuse value '''directly''' without confirmation, uses the <code>-y</code> parameter with the <code>fuse prog</code> command, as per the previous example:
<pre>
u-boot=> fuse prog -y 9 0 c21eafcd
u-boot=> fuse prog -y 9 1 0050
</pre>
