From a994b3deb00bf3177cdf9f92060baec4f640f466 Mon Sep 17 00:00:00 2001 From: Shengzhou Liu Date: Wed, 16 Dec 2015 16:45:41 +0800 Subject: driver/ddr/fsl: Add workaround for A009663 Erratum A-009663 workaround requires to set DDR_INTERVAL[BSTOPRE] to 0 before setting DDR_SDRAM_CFG[MEM_EN] and set DDR_INTERVAL[BSTOPRE] to the desired value after DDR initialization has completed. When DDR controller is configured to operate in auto-precharge mode(DDR_INTERVAL[BSTOPRE]=0), this workaround is not needed. Signed-off-by: Shengzhou Liu Reviewed-by: York Sun --- include/fsl_ddr_sdram.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/fsl_ddr_sdram.h') diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h index 9ea8b63779..3699c0408a 100644 --- a/include/fsl_ddr_sdram.h +++ b/include/fsl_ddr_sdram.h @@ -129,6 +129,7 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t; #define SDRAM_CFG2_ODT_ONLY_READ 2 #define SDRAM_CFG2_ODT_ALWAYS 3 +#define SDRAM_INTERVAL_BSTOPRE 0x3FFF #define TIMING_CFG_2_CPO_MASK 0x0F800000 #if defined(CONFIG_SYS_FSL_DDR_VER) && \ -- cgit v1.2.1