I note that Device::BCM2835 has many functions with fully-qualifed names that aren't exported. You've shown use of one of these:

Device::BCM2835::gpio_fsel(...);
[download]

and I showed how to create an alias:

*gpio_fsel = \&Device::BCM2835::gpio_fsel;
[download]

If you're actually using a number of these subroutines, you can make aliases for all in a similar fashion to ++ikegami's "Taken a step further". For example, if you're using Device::BCM2835::gpio_fsel(...), Device::BCM2835::gpio_set(...) and Device::BCM2835::gpio_clr(...), you could write:

for my $sub (qw{gpio_fsel gpio_set gpio_clr}) {
    no strict 'refs';
    *$sub = \&{"Device::BCM2835::$sub"};
}
[download]

and subsequently call:

gpio_fsel(...);
gpio_set(...);
gpio_clr(...);
[download]

Update (typo fix): I had written "(...}" instead of "(...)"; then, with the power of copy-paste, propagated that typo two more times. I've fixed all three instances.