diff options
Diffstat (limited to 'board/xes/xpedite550x/ddr.c')
| -rw-r--r-- | board/xes/xpedite550x/ddr.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/board/xes/xpedite550x/ddr.c b/board/xes/xpedite550x/ddr.c index 718cd98..38a4597 100644 --- a/board/xes/xpedite550x/ddr.c +++ b/board/xes/xpedite550x/ddr.c @@ -55,16 +55,16 @@ unsigned int fsl_ddr_get_mem_data_rate(void) * There are traditionally three board-specific SDRAM timing parameters * which must be calculated based on the particular PCB artwork. These are: * 1.) CPO (Read Capture Delay) - * - TIMING_CFG_2 register - * Source: Calculation based on board trace lengths and - * chip-specific internal delays. + * - TIMING_CFG_2 register + * Source: Calculation based on board trace lengths and + * chip-specific internal delays. * 2.) CLK_ADJUST (Clock and Addr/Cmd alignment control) - * - DDR_SDRAM_CLK_CNTL register - * Source: Signal Integrity Simulations + * - DDR_SDRAM_CLK_CNTL register + * Source: Signal Integrity Simulations * 3.) 2T Timing on Addr/Ctl - * - TIMING_CFG_2 register - * Source: Signal Integrity Simulations - * Usually only needed with heavy load/very high speed (>DDR2-800) + * - TIMING_CFG_2 register + * Source: Signal Integrity Simulations + * Usually only needed with heavy load/very high speed (>DDR2-800) * * ====== XPedite550x DDR3-800 read delay calculations ====== * @@ -82,14 +82,14 @@ typedef struct { const board_specific_parameters_t board_specific_parameters[][20] = { { /* Controller 0 */ - { + { /* DDR3-600/667 */ .datarate_mhz_low = 500, .datarate_mhz_high = 750, .clk_adjust = 5, .cpo = 31, }, - { + { /* DDR3-800 */ .datarate_mhz_low = 750, .datarate_mhz_high = 850, @@ -162,4 +162,3 @@ void fsl_ddr_board_options(memctl_options_t *popts, popts->rtt_override = 1; popts->rtt_override_value = 3; } - |