Hi Steen, On Wed, 8 May 2024 08:08:30 +0000 <Steen.Hegelund@xxxxxxxxxxxxx> wrote: ... > > +/* Mapping of source to destination interrupts (_n = 0..8) */ > > Are the indices really needed on LAN966X_OIC_DST_INTR_MAP* and _IDENT* > You do not appear to be using them? > > > > +#define LAN966X_OIC_DST_INTR_MAP(_n) 0x78 Indeed, I missed them. These registers are defined from 0 to 8 in the document: https://microchip-ung.github.io/lan9662_reginfo/reginfo_LAN9662.html?select=cpu,intr The code use only the indice 0. In the next iteration, I will keep indices and update the definition of registers like that: #define LAN966X_OIC_DST_INTR_MAP(_n) (0x78 + (_n) * 4) Best regards Hervé