driver/ddr/fsl: Add address parity support for DDR4 UDIMM/discrete
Add support of address parity for DDR4 UDIMM or discrete memory.
It requires to configurate corresponding MR5[2:0] and
TIMING_CFG_7[PAR_LAT]. Parity can be turned on by hwconfig,
e.g. hwconfig=fsl_ddr:parity=on.
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/drivers/ddr/fsl/options.c b/drivers/ddr/fsl/options.c
index 791d644..d0075ff 100644
--- a/drivers/ddr/fsl/options.c
+++ b/drivers/ddr/fsl/options.c
@@ -1002,8 +1002,19 @@
popts->twot_en = 0;
popts->threet_en = 0;
- /* for RDIMM, address parity enable */
- popts->ap_en = 1;
+ /* for RDIMM and DDR4 UDIMM/discrete memory, address parity enable */
+ if (popts->registered_dimm_en)
+ popts->ap_en = 1; /* 0 = disable, 1 = enable */
+ else
+ popts->ap_en = 0; /* disabled for DDR4 UDIMM/discrete default */
+
+ if (hwconfig_sub_f("fsl_ddr", "parity", buf)) {
+ if (hwconfig_subarg_cmp_f("fsl_ddr", "parity", "on", buf)) {
+ if (popts->registered_dimm_en ||
+ (CONFIG_FSL_SDRAM_TYPE == SDRAM_TYPE_DDR4))
+ popts->ap_en = 1;
+ }
+ }
/*
* BSTTOPRE precharge interval