Using Device Tree Overlay to Remove GPIO Pin Bias

Community
1

I am trying to develop a device tree overlay to remove the bias on a GPIO pin. This is the device tree overlay I have thus far:

dts-v1/;                                                                                                                               
  2 /plugin/;
  3  
  4 / {
  5     compatible = "rockchip,rk3308";
  6  
  7     fragment@0 {
  8         target = <&gpio0>;
  9         __overlay__ {
 10             pinctrl-names = "default";
 11             pinctrl-0 = <&my_gpio_pin>;
 12  
 13             my_gpio_pin: my-gpio-pin {
 14                 pins = <23>;
 15                 function = "gpio_in";
 16                 bias-disable;
 17             };
 18         };
 19     };
 20 };

I can do it with ‘gpioset’ utility but I want it done via DT overlay. Is there guidance as to how to accomplish this with DT overlay and rockchip devices?