On Tue, Nov 26, 2024 at 08:04:38AM +0100, Krzysztof Kozlowski wrote: > On Mon, Nov 25, 2024 at 05:58:17PM +0000, Valentina Fernandez wrote: > > +properties: > > + compatible: > > + oneOf: > > + - description: > > + Intended for use by software running in supervisor privileged > > + mode (s-mode). This SBI interface is compatible with the Mi-V > > + Inter-hart Communication (IHC) IP. > > + const: microchip,sbi-ipc > > + > > + - description: > > + Intended for use by the SBI implementation in machine mode > > + (m-mode), this compatible string is for the MIV_IHC Soft-IP. > > + const: microchip,miv-ihc-rtl-v2 > > +allOf: > > + - if: > > + properties: > > + compatible: > > + contains: > > + const: microchip,sbi-ipc > > + then: > > + properties: > > + reg: false > > What does this mean in reality? Device does not have IO address space? > Then it is completely different programming model, isn't it? Ye, different programming models. Two compatibles for the same hardware, but one represents the m-mode/firmware programming model that has MMIO access and is the SBI implementation and the other the s-mode/OS programming model that uses ecalls provided by the SBI implementation. > > + microchip,ihc-chan-disabled-mask: false > > + else: > > + required: > > + - reg > > + - microchip,ihc-chan-disabled-mask
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