[U-Boot] ODROID dynamic memory initialization

Daniel Drake drake at endlessm.com
Tue Jul 22 15:08:36 CEST 2014


Hi Przemyslaw,

While looking at the old uboot from hardkernel, I'm curious about
CONFIG_CLK_BUS_DMC_220_440, which is set by default. This appears to
run the memory at a high speed, by writing certain registers in the
Dynamic Memory Controller (e.g. TIMINGROW), and clocking MPLL to
880MHz.

Your uboot patches don't seem to touch DMC regs like TIMINGROW, and
also clock the MPLL at 800MHz.

I'm wondering if there is any reason for this? Wouldn't it be better
to run at the faster speed like the vendor code does?

Thanks
Daniel


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