[U-Boot] [PATCH v4 07/11] mpc8xxx: set x2 DDR3 refresh rate if SPD config requires it

York Sun yorksun at freescale.com
Fri Oct 18 20:34:58 CEST 2013


On 10/18/2013 02:47 AM, Valentin Longchamp wrote:
> If the DDR3 module supports industrial temperature range and requires
> the x2 refresh rate for that temp range, the refresh period must be
> 3.9us instead of 7.8 us.
> 
> This was successfuly tested on kmp204x board with some MT41K128M16 DDR3
> RAM chips (no module used, chips directly soldered on board with an SPD
> EEPROM).
> 
> Signed-off-by: Valentin Longchamp <valentin.longchamp at keymile.com>
> 
> ---
> Changes in v4: None
> Changes in v3: None
> Changes in v2:
> - when refresh rate gets halved for extended range temperature
>   operations, the srt bit in the mode register 2 is set.
> 

Applied to 85xx/next, pending merge to 85xx/master.

York



More information about the U-Boot mailing list