On Tue, Apr 21, 2020 at 7:54 PM Jack Mitchell <m...@embed.me.uk> wrote: > > 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.
I have tried single-channel with DDR3 which is present on NOE4, I believe the existing code does handle single channel for LPDDR4, can you enable debugs and check on existing code. Usually the code cannot go and try channel 1. Jagan.
