[U-Boot] [PATCH] arm: socfpga: move gen5 SDR driver to DM

[Dalon L Westergreen <dalon.westergreen@linux.intel.com>]

On Sat, 2019-02-09 at 11:02 +0100, Marek Vasut wrote:
> On 2/8/19 11:51 PM, Dalon L Westergreen wrote:
> > On Fri, 2019-02-08 at 21:36 +0100, Simon Goldschmidt wrote:
> > > 
> > > Am Fr., 8. Feb. 2019, 21:28 hat Dalon L Westergreen <
> > > dalon.westergreen at linux.intel.com> geschrieben:
> > > > On Thu, 2019-02-07 at 22:23 +0100, Simon Goldschmidt wrote:
...
> > 
> > All you need is to have the h2f bridge enabled during the boot.  We used to
> > do
> > this for you if spl found that the FPGA was already configured.  On the FPGA
> > side, a nios in the ddr controller runs the ddr calibration code.
> 
> This is stratix10 you're talking about, isn't it ? I recall S10 has
> nios2 hard block to start up the DRAM, but Gen5 and A10 do not have
> that, do they ?
> 
S10 and A10 both have a hard nios for ddr callibration, in cv / av for
the soc emif, the A9 performs this functions, but for FPGA only DDR
controllers there is a soft nios included in the FPGA ddr RTL that
does the ddr callibration.  The cv/av code that does this is based
on the soft nios core code that performs this function for fpga ddr
controllers.

--dalon