On Thu, May 27, 2021 at 01:32:57PM +0530, Anuj Deshpande wrote: > Hi > > I was looking at the Zephyr for Greybus > <https://github.com/cfriedt/greybus-for-zephyr/> work, and realized that > the actual spec for greybus doesn't actually have support for ADC. My > usecase is to use the ADCs on an attached microcontroller as if they are > native ADCs on a Linux machine. > > I understand this is more complicated than it looks - because unlike a > GPIO, or I2C, there's no such thing as a native ADC for the Linux side of > things. Have I understood that correctly? > > I stumbled into the IIO subsystem for such requirements where there's some > analog sensor that would need to be read - but that would not work through > a microcontroller like my use case. > > If one were to look at adding such support, what would they need? Is this > something that's been discussed before? Would love to understand this a bit > more, and potentially contribute. This was talked about unofficially when we were creating the protocol and we considered making an IIO driver, or maybe a IIO-HID driver (for the types that HID supports), but it never got very far. You could always just use the serial class and talk to the device like a "fake serial device" if that works, but then you loose all of the IIO user/kernel api functionality. So, sorry, there isn't a solution for this yet, but if you wanted to work on creating such a class device, I know I would not object :) thanks, greg k-h _______________________________________________ greybus-dev mailing list greybus-dev@xxxxxxxxxxxxxxxx https://lists.linaro.org/mailman/listinfo/greybus-dev
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