> Do you know the I2C repeated start feature [1]? This allows to batch together > multiple I2C read/writes in a single transfer. And in the best case, this > transfer is executed in one go without a delay in between. At least in the > kernel it's guaranteed that no other driver can go in between with another > transfer. If the HW does rep_start properly, it is even guaranteed on the bus because the bus is never seen as free by other participants. Check "START and STOP" conditions in the I2C specs.
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