Hi Krzysztof, On 01/05/24 3:58 pm, Krzysztof Kozlowski wrote: > On 30/04/2024 14:19, MD Danish Anwar wrote: >> Add documentation for pa-stats node which is syscon regmap for >> PA_STATS register. This will be used to dump statistics maintained by >> ICSSG firmware. >> >> Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx> >> --- >> .../devicetree/bindings/soc/ti/ti,pruss.yaml | 17 +++++++++++++++++ >> 1 file changed, 17 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml b/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml >> index c402cb2928e8..cb6f41660847 100644 >> --- a/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml >> +++ b/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml >> @@ -278,6 +278,23 @@ patternProperties: >> >> additionalProperties: false >> >> + pa-stats@[a-f0-9]+$: > > Missing ^ > Sure, I will add that. >> + description: | >> + PA-STATS sub-module represented as a SysCon. >> + >> + type: object >> + >> + properties: >> + compatible: >> + items: >> + - const: ti,pruss-pa-st >> + - const: syscon >> + > > No resources? So you use it just to instantiate Linux driver? That's not > the purpose of DT. Just squash it into parent node? > I am trying to module pa-stats as a regmap just like mii-rt and mii-g-rt. ICSSG has different segments for storing different types of registers. mii-rt, starting at 0x32000 have registers that stores mainly TX and RX configurations. mii-g-rt, starting at 0x33000 have registers that stores hardware statistics counters (TX RX good frame, drop etc). Similarly pa-stats starting at 0x2c000 have registers that stores some diagnostic counters which is maintained by firmware. ICSSG firmware stores statistics other than hadrware statistics like if the packet was pushed to dma or not. Why was the packet dropped etc. This is very helpful in debugging failures. Also ICSSG firmware maintains all TSN related statistics in this memory only, which will be needed to be dumped from driver once TSN support is enabled (the patches for that are still under review). More or less the functionality of pa-stats here is same as mii-rt and mii-g-rt and that is why I am trying to describe the node in exactly the same way as the other two nodes. >> + reg: >> + maxItems: 1 >> + >> + additionalProperties: false > > Put it after type:object. > Sure, will move it. >> + >> interrupt-controller@[a-f0-9]+$: >> description: | >> PRUSS INTC Node. Each PRUSS has a single interrupt controller instance > > Best regards, > Krzysztof > -- Thanks and Regards, Danish
