On Tue, Apr 12, 2022 at 10:50:45AM +0200, Vincent Whitchurch wrote: > When drivers with ->detect callbacks are loaded, the I2C core does a > bunch of transactions to try to probe for these devices, regardless of > whether they are specified in the devicetree or not. (This only happens > on I2C controllers whose drivers enable the I2C_CLASS* flags, but this > is the case for generic drivers like i2c-gpio.) > > These kinds of transactions are unnecessary on systems where the > devicetree specifies all the devices on the I2C bus, so add a property > to indicate that the devicetree description of the hardware is complete > and thus allow this discovery to be disabled. Hmm, I don't think the name is fitting. "no-detect" is the desired behaviour but a proper description is more like "bus-complete" or something? That aside, I am not sure we should handle this at DT level. Maybe we should better change the GPIO driver to not populate a class if we have a firmware node?
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