Hi Bryan, others, On Tue, Jan 20, 2026 at 12:44:24PM +0000, Bryan O'Donoghue wrote: > I think reset should be asserted before regulators and power are switched > on. i.e. before you try to switch the chip on, you should establish that the > reset pin is in the state that the timing diagram calls for.
Indeed. The xshutdown pin, as it is typically called labelled as "reset" in this case, functions as both hardware reset and hardware standby mode control. It should be asserted (i.e. be set to low level) whenever the sensor is expected to be powered off. Typically deasserting it is the last step in the sensor's power-up sequence. This applies to nearly all CSI-2 and DVP (parallel) camera sensors. (There are some exceptions that use explicitly two GPIOs for similar functions but there are very few of them.) -- Regards, Sakari Ailus
