You can request your father to make a Will of his property in favour of a beneficiary, other than you
He can also create a trust of his property whose income can then be applied for pious purposes
Even if father makes a Will and makes you a legatee/sole beneficiary, you are always at liberty to submit the property inherited by you for charitable purposes
Even you can create a trust of the property inherited by you
Till your father is alive, you do not have any right in his property legally. So technically you cannot even make any document whereby you can release or relinquish the property to be inherited by you in future
It is very pleasing to come across a person who is not wanting to claim any right in his parents property
Majority of the queries which i answer here are from people who claim share and right in their parents property and quarrel over it