On Thu, Mar 16, 2023 at 09:06:32AM +0100, Krzysztof Kozlowski wrote:
> On 13/03/2023 23:50, Serge Semin wrote:
> > Currently none of the AXI-bus non-boolean DT-properties have constraints
> > defined meanwhile they can be specified at least based on the
> > corresponding device configs. Let's do that:
> > + snps,wr_osr_lm/snps,rd_osr_lmt - maximum number of outstanding AXI-bus
> > read/write requests is limited with the IP-core synthesize parameter
> > AXI_MAX_{RD,WR}_REQ. DW MAC/GMAC: <= 16, DW Eth QoS: <= 32, DW xGMAC: <=
> > 64. The least restrictive constraint is defined since the DT-schema is
> > common for all IP-cores.
> > + snps,blen - array of the burst lengths supported by the AXI-bus. Values
> > are limited by the AXI3/4 bus standard, available AXI/System bus CSR flags
> > and the AXI-bus IP-core synthesize config . All DW *MACs support setting
> > the burst length within the set: 4, 8, 16, 32, 64, 128, 256. If some burst
> > length is unsupported a zero value can be specified instead in the array.
> >
> > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
>
>
> >
> > snps,kbbe:
> > $ref: /schemas/types.yaml#/definitions/uint32
> > @@ -501,6 +507,8 @@ properties:
> > this is a vector of supported burst length.
> > minItems: 7
> > maxItems: 7
> > + items:
> > + enum: [256, 128, 64, 32, 16, 8, 4, 0]
>
> Increasing order.
Ok.
-Serge(y)
>
> Best regards,
> Krzysztof
>
