return -ENOTSUPP;
 
        bits = ni_readl(dev, NI_M_PFI_FILTER_REG);
-       bits &= ~MSeries_PFI_Filter_Select_Mask(pfi_channel);
-       bits |= MSeries_PFI_Filter_Select_Bits(pfi_channel, filter);
+       bits &= ~NI_M_PFI_FILTER_SEL_MASK(pfi_channel);
+       bits |= NI_M_PFI_FILTER_SEL(pfi_channel, filter);
        ni_writel(dev, bits, NI_M_PFI_FILTER_REG);
        return 0;
 }
 
 #define NI_M_AO_CALIB_REG              0x0a3
 #define NI_M_AO_FIFO_DATA_REG          0x0a4
 #define NI_M_PFI_FILTER_REG            0x0b0
+#define NI_M_PFI_FILTER_SEL(_c, _f)    (((_f) & 0x3) << ((_c) * 2))
+#define NI_M_PFI_FILTER_SEL_MASK(_c)   NI_M_PFI_FILTER_SEL((_c), 0x3)
 #define NI_M_RTSI_FILTER_REG           0x0b4
 #define NI_M_SCXI_LEGACY_COMPAT_REG    0x0bc
 #define NI_M_DAC_DIRECT_DATA_REG(x)    (0x0c0 + ((x) * 4))
 #define NI_M_AO_REF_ATTENUATION_REG(x) (0x264 + (x))
 #define NI_M_AO_REF_ATTENUATION_X5     BIT(0)
 
-static inline unsigned MSeries_PFI_Filter_Select_Mask(unsigned channel)
-{
-       return 0x3 << (channel * 2);
-}
-
-static inline unsigned MSeries_PFI_Filter_Select_Bits(unsigned channel,
-                                                     unsigned filter)
-{
-       return (filter << (channel *
-                          2)) & MSeries_PFI_Filter_Select_Mask(channel);
-}
-
 enum CDIO_DMA_Select_Bits {
        CDI_DMA_Select_Shift = 0,
        CDI_DMA_Select_Mask = 0xf,