On Wed, Nov 12, 2014 at 03:14:35PM -0700, Simon Glass wrote:
[snip, and sorry for the late reply]
What I am talking about here is the memory for U-Boot - i.e. how does U-Boot know how much memory is available. The scheme here is that you can have a board ID which controls this, with the U-Boot device tree allowing the options to be specified (i.e. the mapping from board ID to SDRAM banks)
OK. So what I'm getting at is how is this different from other boards where we say "Oh, this is $FOO, it has $X LPDRR2 RAM" and "Oh, this is $BAR, it has $Y DDR3 RAM" ? The only thing I'm able to think of is that we cannot call get_ram_size() to see the _size_ of the RAM after doing $whatever to see what board we're on and doing the right configuration for the DDR controller or whatever.