From: Haiying Wang Haiying.Wang@freescale.com
Enable half drive strength, set RTT to 60Ohm and set write leveling override.
Signed-off-by: Haiying Wang Haiying.Wang@freescale.com --- board/freescale/mpc8569mds/ddr.c | 16 +++++++++++++--- 1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/board/freescale/mpc8569mds/ddr.c b/board/freescale/mpc8569mds/ddr.c index e938788..e3f5b4a 100644 --- a/board/freescale/mpc8569mds/ddr.c +++ b/board/freescale/mpc8569mds/ddr.c @@ -77,8 +77,18 @@ void fsl_ddr_board_options(memctl_options_t *popts, popts->write_data_delay = 2;
/* - * Factors to consider for half-strength driver enable: - * - number of DIMMs installed + * Enable half drive strength */ - popts->half_strength_driver_enable = 0; + popts->half_strength_driver_enable = 1; + + /* Write leveling override */ + popts->wrlvl_en = 1; + popts->wrlvl_override = 1; + popts->wrlvl_sample = 0xa; + popts->wrlvl_start = 0x4; + + /* Rtt and Rtt_W override */ + popts->rtt_override = 1; + popts->rtt_override_value = DDR3_RTT_60_OHM; + popts->rtt_wr_override_value = 0; /* Rtt_WR= dynamic ODT off */ }