Activate a pinmux without driver at an Overlay

I just want to do a pinmux setting. I don’t need a bone-pinmux-helper or something like.

I would usually just edit the dtb-rebuilder “&am33xx_pinmux” section and add my code:

&am33xx_pinmux {
pinctrl-names = “default”;
pinctrl-0 = <&clkout2_pin &my_pins>;

my_pins: pinmux_my_pins {
pinctrl-single,pins = <
0x040 0x37


Is there a solution to add “my_pins” to “pinctrl-0” with a overlay, since it already is defined with clkout2_pin?