On 10/04/2024 04:20, Ondřej Jirman wrote: > On Mon, Apr 08, 2024 at 10:12:30PM GMT, Krzysztof Kozlowski wrote: >> On 08/04/2024 17:17, Ondřej Jirman wrote: >>> >>> Now for things to not fail during suspend/resume based on PM callbacks >>> invocation order, anx7688 driver needs to enable this regulator too, as long >>> as it needs it. >> >> No, the I2C bus driver needs to manage it. Not one individual I2C >> device. Again, why anx7688 is specific? If you next phone has anx8867, >> using different driver, you also add there i2c-supply? And if it is >> nxp,ptn5100 as well? > > Yes, that could work, if I2C core would manage this.
Either I don't understand about which I2C regulator you speak or this is not I2C core regulator. This is a regulator to be managed by the I2C controller, not by I2C core. > >>> >>> I can put bus-supply to I2C controller node, and read it from the ANX7688 >>> driver >>> I guess, by going up a DT node. Whether that's going to be acceptable, I >>> don't >>> know. >>> >>> >>> VCONN regulator I don't know where else to put either. It doesn't seem to >>> belong >>> anywhere. It's not something directly connected to Type-C connector, so >>> not part of connector bindings, and there's nothing else I can see, other >>> than anx7688 device which needs it for core functionality. >> >> That sounds like a GPIO, not regulator. anx7688 has GPIOs, right? On >> Pinephone they go to regulator, but on FooPhone also using anx7688 they >> go somewhere else, so why this anx7688 assumes this is a regulator? > > CC1/CC2_VCONN control pins are "GPIO" of anx7688, sort of. They have fixed > purpose of switching external 5V regulator output to one of the CC pins > on type-c port. I don't care what other purpose with some other firmware > someone puts to those pins. It's irrelevant to the use case of anx7688 > as a type-c controller/HDMI bridge, which we're describing here. > > VCONN regulator is an actual GPIO controlled regulator on the board, and > needs to be controlled by the anx7688 driver. So that CC1/CC2_VCONN control > pins driven by the firmware actually do what they're supposed to do. > > Not sure why it would be a business of anything else but anx7688 driver > enabling this regulator, because only this driver knows and cares about this. > If some other board doesn't have the need to manually enable the regulator, or > doesn't have the regulator, it can simply be optional. > > There are also some other funky supplies in the bindings, that are not > connected > to the chip in any way, but need to be controlled by the driver: > > + vbus-supply: true > + vbus-in-supply: true Yeah, the vconn looks reasonable. Just provide description of the supply, so it will be obvious. > Best regards, Krzysztof
