diff options
Diffstat (limited to 'include/configs/sbc8548.h')
| -rw-r--r-- | include/configs/sbc8548.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/configs/sbc8548.h b/include/configs/sbc8548.h index 1df2225..44c7526 100644 --- a/include/configs/sbc8548.h +++ b/include/configs/sbc8548.h @@ -119,9 +119,15 @@ /* DDR Setup */ #define CONFIG_FSL_DDR2 #undef CONFIG_FSL_DDR_INTERACTIVE +#undef CONFIG_DDR_ECC /* only for ECC DDR module */ +/* + * A hardware errata caused the LBC SDRAM SPD and the DDR2 SPD + * to collide, meaning you couldn't reliably read either. So + * physically remove the LBC PC100 SDRAM module from the board + * before enabling the two SPD options below. + */ #undef CONFIG_SPD_EEPROM /* Use SPD EEPROM for DDR setup */ #undef CONFIG_DDR_SPD -#undef CONFIG_DDR_ECC /* only for ECC DDR module */ #define CONFIG_ECC_INIT_VIA_DDRCONTROLLER /* DDR controller or DMA? */ #define CONFIG_MEM_INIT_VALUE 0xDeadBeef @@ -283,9 +289,14 @@ /* * SDRAM on the Local Bus (CS3 and CS4) + * Note that most boards have a hardware errata where both the + * LBC SDRAM and the DDR2 SDRAM decode at 0x51, making it impossible + * to use CONFIG_DDR_SPD unless you physically remove the LBC DIMM. */ +#ifndef CONFIG_DDR_SPD #define CONFIG_SYS_LBC_SDRAM_BASE 0xf0000000 /* Localbus SDRAM */ #define CONFIG_SYS_LBC_SDRAM_SIZE 128 /* LBC SDRAM is 128MB */ +#endif /* * Base Register 3 and Option Register 3 configure the 1st 1/2 SDRAM. |