LSB in debug_28 register is cleared here so previous setting by errata A009942 is lost. Save and restore LSB in debug_28
Signed-off-by: Joakim Tjernlund joakim.tjernlund@infinera.com --- drivers/ddr/fsl/fsl_ddr_gen4.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index 31c58d9a8e..1f8ff87a8b 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -477,6 +477,8 @@ step2: #ifdef CONFIG_SYS_FSL_ERRATUM_A009942 ddr_freq = get_ddr_freq(ctrl_num) / 1000000; val32 = ddr_in32(&ddr->debug[28]); + temp32 = val32 & 0xff; + debug("cpo_sample:%x\n", temp32); val32 &= 0xff0fff00; if (ddr_freq <= 1333) val32 |= 0x0080006a; @@ -487,6 +489,8 @@ step2: else if (ddr_freq <= 2133) val32 |= 0x0060007b;
+ if (temp32) + val32 = (val32 & ~0xff) | temp32; ddr_out32(&ddr->debug[28], val32); debug("Applied errata CONFIG_SYS_FSL_ERRATUM_A009942\n"); #endif