On Fri, Aug 02, 2019 at 09:32:17AM +0100, Thomas Preston wrote: > On 02/08/2019 00:42, Mark Brown wrote: > > Yes, that's definitely doable - we've got some other drivers with > > similar things like calibration triggers exposed that way. > One problem with using a kcontrol as a trigger for the turn-on diagnostic > is that the diagnostic routine has a "return value". You can use a read only control for the readback, or just have it be triggered by overwriting the readback value. You can cache the result. > Hm, maybe a better idea is to have the turn on diagnostic only run on > device probe (as its name suggests!), and print something to dmesg: > modprobe tda7802 turn_on_diagnostic=1 > tda7802-codec i2c-TDA7802:00: Turn on diagnostic 04 04 04 04 > Kirill Marinushkin mentioned this in the first review [0], it just didn't > really sink in until now! You could do that too, yeah. Depends on what this is diagnosing and if that'd be useful.
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