[U-Boot] [Patch v2, batch 2 12/23] powerpc/mpc8xxx: Fix DDR 3-way interleaving

[York Sun]

Should check if interleaving is enabled before using interleaving mode.

Signed-off-by: York Sun <yorksun at freescale.com>
---
 arch/powerpc/cpu/mpc8xxx/ddr/main.c |   19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/main.c b/arch/powerpc/cpu/mpc8xxx/ddr/main.c
index 5311a26..1a8d593 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/main.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/main.c
@@ -541,14 +541,17 @@ phys_size_t fsl_ddr_sdram(void)
 		total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 0);
 
 	/* setup 3-way interleaving before enabling DDRC */
-	switch (info.memctl_opts[0].memctl_interleaving_mode) {
-	case FSL_DDR_3WAY_1KB_INTERLEAVING:
-	case FSL_DDR_3WAY_4KB_INTERLEAVING:
-	case FSL_DDR_3WAY_8KB_INTERLEAVING:
-		fsl_ddr_set_intl3r(info.memctl_opts[0].memctl_interleaving_mode);
-		break;
-	default:
-		break;
+	if (info.memctl_opts[0].memctl_interleaving) {
+		switch (info.memctl_opts[0].memctl_interleaving_mode) {
+		case FSL_DDR_3WAY_1KB_INTERLEAVING:
+		case FSL_DDR_3WAY_4KB_INTERLEAVING:
+		case FSL_DDR_3WAY_8KB_INTERLEAVING:
+			fsl_ddr_set_intl3r(
+				info.memctl_opts[0].memctl_interleaving_mode);
+			break;
+		default:
+			break;
+		}
 	}
 
 	/* Program configuration registers. */
-- 
1.7.9.5