Function fdt_overlay_target_offset 

pub unsafe extern "C" fn fdt_overlay_target_offset(
    fdt: *const c_void,
    fdto: *const c_void,
    fragment_offset: c_int,
    pathp: *mut *const c_char,
) -> c_int

fdt_overlay_target_offset - retrieves the offset of a fragment’s target @fdt: Base device tree blob @fdto: Device tree overlay blob @fragment_offset: node offset of the fragment in the overlay @pathp: pointer which receives the path of the target (or NULL)

fdt_overlay_target_offset() retrieves the target offset in the base device tree of a fragment, no matter how the actual targeting is done (through a phandle or a path)

returns: the targeted node offset in the base device tree Negative error code on error