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authorYork Sun <yorksun@freescale.com>2011-08-24 09:40:26 -0700
committerKumar Gala <galak@kernel.crashing.org>2011-09-29 19:01:06 -0500
commitcda1de21ded801306e05c0e2ee17ca9c60a87872 (patch)
tree30f597aa3591c24fc50cf9cfb38fd3c37beb3b79 /arch/powerpc/cpu
parent2bba85f41246d2bc1db00f2b0cce831b5efd4dfe (diff)
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powerpc/mpc8xxx: Move DDR RCW overriding to common code
DDR RCW varies at different speeds. It is common for all platform. Move it out from corenet_ds. Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu')
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/options.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/options.c b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
index bd9c466..89dc479 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/options.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
@@ -272,6 +272,7 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
char buffer[HWCONFIG_BUFFER_SIZE];
char *buf = NULL;
const dynamic_odt_t *pdodt = odt_unknown;
+ ulong ddr_freq;
/*
* Extract hwconfig from environment since we have not properly setup
@@ -716,6 +717,20 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
if (pdimm[0].n_ranks == 4)
popts->quad_rank_present = 1;
+ ddr_freq = get_ddr_freq(0) / 1000000;
+ if (popts->registered_dimm_en) {
+ popts->rcw_override = 1;
+ popts->rcw_1 = 0x000a5a00;
+ if (ddr_freq <= 800)
+ popts->rcw_2 = 0x00000000;
+ else if (ddr_freq <= 1066)
+ popts->rcw_2 = 0x00100000;
+ else if (ddr_freq <= 1333)
+ popts->rcw_2 = 0x00200000;
+ else
+ popts->rcw_2 = 0x00300000;
+ }
+
fsl_ddr_board_options(popts, pdimm, ctrl_num);
return 0;