if (ctrl & NAND_CTRL_CHANGE) {
                unsigned long bits;
 
-               bits = (~ctrl & NAND_NCE) << 2;
-               bits |= (ctrl & NAND_CLE) << 7;
-               bits |= (ctrl & NAND_ALE) << 6;
+               bits = (~ctrl & NAND_NCE) ? AMS_DELTA_LATCH2_NAND_NCE : 0;
+               bits |= (ctrl & NAND_CLE) ? AMS_DELTA_LATCH2_NAND_CLE : 0;
+               bits |= (ctrl & NAND_ALE) ? AMS_DELTA_LATCH2_NAND_ALE : 0;
 
-               ams_delta_latch2_write(0xC2, bits);
+               ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_CLE |
+                               AMS_DELTA_LATCH2_NAND_ALE |
+                               AMS_DELTA_LATCH2_NAND_NCE, bits);
        }
 
        if (cmd != NAND_CMD_NONE)