On 18:17-20231003, Ayush Singh wrote: > > > + > > > + reset-gpios: > > > + maxItems: 1 > > > + > > > + power-gpios: > > > + maxItems: 3 > > > + description: > > > + The device has three power rails that are exposed on external pins VDDS, > > > + VDDR and DCOUPL. > > Shouldn't these be regulators? The power rails are input to the MCU, > > correct? > > The properties should be something like: > > vdds-supply > > vddr-supply > > dcoupl-supply ? (not sure what dcoupl is, but description should provide > > that info). > > > > the gpio controls for those can be modelled by regulator-gpio ? > > I picked up power lines from "CC13xx/CC26xx Hardware Configuration and PCB > Design Considerations Application Report" present under "8.14 Network > Processor" of CC1352P7 data sheet. > > But now looking closer, it doesn't seem like DCOUPL can be supplied > externally for CC1352P7 and thus should probably be removed. > > Also, it seems like for CC1352P7, VDDR must always be supplied internally > (The data sheet states: "Internal supply, must be powered from the internal > DC/DC converter or the internal LDO"). Thus, it should be safe to remove > VDDR as well. >From Figure 3-1. CC1312R 7x7 RF Part Schematic Overview (app report you point out below) Typical usage is vdds-supply supplying: VDDS (pin 44) VDDS2 (pin 13) VDDS3 (pin 22) VDDS_DCDC (pin 34) And DCDC_SW (pin 33) supplies vddr supplying: VDDR(pin 45) VDDR_RF (Pin 48) > > > That means only VDDS needs to be present for power line. I agree that that would be the typical supply model. So, just vdds-supply > > > CC13xx/CC26xx Hardware Configuration and PCB Design Considerations > Application Report: https://www.ti.com/lit/pdf/swra640 > > CC1352P7 Data sheet: https://www.ti.com/lit/gpn/CC1352P7 -- Regards, Nishanth Menon Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D _______________________________________________ greybus-dev mailing list -- greybus-dev@xxxxxxxxxxxxxxxx To unsubscribe send an email to greybus-dev-leave@xxxxxxxxxxxxxxxx
|