[U-Boot] Modifying the Device tree fields

[Kamaraj P]

Hello All,

In my device tree blob, i would like to add some interrupt to the
protected-source list dynamically in the u-boot before launching the linux
kernel.

 mpic: pic at 40000 {
            interrupt-controller;
            #address-cells = <0>;
            #interrupt-cells = <2>;
            reg = <0x40000 0x40000>;
            compatible = "chrp,open-pic";
            device_type = "open-pic";
            protected-sources = <
            16
             >

In the above DTS file,  i would like to add the other interrupts to the
 protected-sources dynamically.
I hope we need to use the device fdt APIs.  Could you please any pointers
or  reference for how to use those APIs in the u-boot ?


Thanks,
Kamaraj