powerpc/mpc8548: Add workaround for erratum NMG_DDR120
Erratum NMG_DDR120 (DDR19 in MPC8548 errata document) applies to some
early version silicons. The default settings of the DDR IO receiver
biasing may not work at cold temperature. When a failure occurs,
a DDR input latches an incorrect value. The workaround will set the
receiver to an acceptable bias point.
Signed-off-by: Gong Chen
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index 0478ec1..f0fa0f5 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -96,6 +96,10 @@
#ifdef CONFIG_SYS_FSL_ERRATUM_IFC_A003399
puts("Work-around for Erratum IFC A-003399 enabled\n");
#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_DDR120
+ if ((SVR_MAJ(svr) == 1) || IS_SVR_REV(svr, 2, 0))
+ puts("Work-around for Erratum NMG DDR120 enabled\n");
+#endif
return 0;
}