rk3399 single channel lpddr4 setup

Has anyone worked with an rk3399 based board with a single channel RAM setup? I've looked at the current code and made some changes for only setting up a single channel which basically consists of altering the loops down to one channel, however u-boot is hanging while checking for a successful frequency change here:

   /* change freq */
   writel((((0x3 << 4) | (1 << 2) | 1) << 16) |
          (fn << 4) | (1 << 2) | 1, &dram->cic->cic_ctrl0);
   while (!(readl(&dram->cic->cic_status0) & (1 << 2)))
           ;

I believe this is due to waiting for both channels to switch frequency which will never happen as there is only a single channel setup.

Has anyone worked with a similar setup, or have any further documentation as the TRM only has a fairly basic register listing.

Regards, Jack.