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mpc8xxx: set x2 DDR3 refresh rate if SPD config requires it

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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@keymile.com>
[York Sun: fix minor conflicts in fsl_ddr_dimm_params.h,
	   lc_common_dimm_params.c, common_timing_params.h]
Acked-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Valentin Longchamp
2013-10-18 11:47:20 +02:00
committed by York Sun
parent 0778bbe2d4
commit 7e157b0ade
5 changed files with 17 additions and 1 deletions
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1
arch/powerpc/include/asm/fsl_ddr_dimm_params.h
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@@ -78,6 +78,7 @@ typedef struct dimm_params_s {
unsigned int trc_ps; /* maximum = 254 ns + .75 ns = 254750 ps */
unsigned int refresh_rate_ps;
unsigned int extended_op_srt;
/* DDR3 doesn't need these as below */
unsigned int tis_ps; /* byte 32, spd->ca_setup */