The default DokuWiki template includes an accesskey attribute for the home page of the wiki in tpl_logo():
... accesskey="h" title="[ALT+H]" ...
It may be useful, but it can conflict with other useful keyboard shortcuts, e.g. Help:
There isn't much of a solution, but it is recommended that numbers be used for accesskey attributes to reduce the problem. There is a government standard that recommends a standard for access keys, which sets "home" as the number 1: