i2c-gpio slave support

i2c-gpio slave support

[Ido Reis]

Hi i2c Experts,

I want to implement a slave device using gpio on my DragonBoard
410c/RaspberryPi.
As a start, I intend to use the i2c-slave-eeprom as the slave device
itself, and wanted to use the i2c-gpio as the bus device.
It looks like that the i2c-gpio does not support slave functionalities
(actually I was wondering why as it should be pretty much straight
forward).
Is there such implementation (couldn't find any in the list history)?
Are there any restrictions to implement one?

Thanks,
Ido

Re: i2c-gpio slave support

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 432 bytes --]


> Is there such implementation (couldn't find any in the list history)?

Nope.

> Are there any restrictions to implement one?

Honestly, I don't think this is feasible. Even at a kind of slow bus
speed of 100 kHz, you'd probably create quite some load. And since you
don't have any guarantee of interrupt latency being below your desired
threshold, you have no guarantee to keep up with the timing of the
master. Which you must.


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 819 bytes --]