-#define PCI1724_DAC_CTRL_MODE_GAIN (1 << 14)
-#define PCI1724_DAC_CTRL_MODE_OFFSET (2 << 14)
-#define PCI1724_DAC_CTRL_MODE_NORMAL (3 << 14)
-#define PCI1724_DAC_CTRL_MODE_MASK (3 << 14)
+#define PCI1724_DAC_CTRL_MODE(x) (((x) & 0x3) << 14)
+#define PCI1724_DAC_CTRL_MODE_GAIN PCI1724_DAC_CTRL_MODE(1)
+#define PCI1724_DAC_CTRL_MODE_OFFSET PCI1724_DAC_CTRL_MODE(2)
+#define PCI1724_DAC_CTRL_MODE_NORMAL PCI1724_DAC_CTRL_MODE(3)
+#define PCI1724_DAC_CTRL_MODE_MASK PCI1724_DAC_CTRL_MODE(3)