diff --git a/drivers/spi/spi-aspeed-smc.c b/drivers/spi/spi-aspeed-smc.c
index 808659a1f460..027caa2eeb5c 100644
--- a/drivers/spi/spi-aspeed-smc.c
+++ b/drivers/spi/spi-aspeed-smc.c
@@ -1467,8 +1467,7 @@ static int aspeed_spi_do_calibration(struct aspeed_spi_chip *chip)
  * must contains the highest number of consecutive "pass"
  * results and not span across multiple rows.
  */
-static u32 aspeed_spi_ast2600_optimized_timing(u32 rows, u32 cols,
-					       u8 buf[rows][cols])
+static u32 aspeed_spi_ast2600_optimized_timing(u32 rows, u32 cols, u8 *buf)
 {
 	int r = 0, c = 0;
 	int max = 0;
@@ -1478,7 +1477,7 @@ static u32 aspeed_spi_ast2600_optimized_timing(u32 rows, u32 cols,
 		for (j = 0; j < cols;) {
 			int k = j;
 
-			while (k < cols && buf[i][k])
+			while (k < cols && buf[(i * cols) + k])
 				k++;
 
 			if (k - j > max) {
@@ -1541,7 +1540,7 @@ static int aspeed_spi_ast2600_calibrate(struct aspeed_spi_chip *chip, u32 hdiv,
 		}
 	}
 
-	calib_point = aspeed_spi_ast2600_optimized_timing(6, 17, calib_res);
+	calib_point = aspeed_spi_ast2600_optimized_timing(6, 17, &calib_res[0][0]);
 	/* No good setting for this frequency */
 	if (calib_point == 0)
 		return -1;