On Mon, Aug 20, 2018 at 07:54:30AM -0700, Tony Lindgren wrote: > Hi, > > * Stefan Lengfeld <contact@xxxxxxxxxxxxxxx> [180813 21:19]: > > Making I2C transfers in atomic context is sometimes needed, e.g. for > > reboot handlers. > > Just a generic comment related to where this might be needed. > Let's try to avoid the slippery slope of making i2c work super > early.. That will just make the race to the bottom initcall > level and defferd probe situation worse :) > > It's best to initialize everything late instead of trying to > initialize something early except for what's needed for system > timers and interrupts. > > So from that point of view I don't have any issues limiting > atomic i2c to shutdown time only. I buy this. There was only one occasion I recall where early, irqless I2C access was desired and I can't even find the discussion now. The use case which came back repeatedly is shutdown/reboot via PMIC. Let's stick to that unless someone speaks up now having a good reason for the early case.
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