* Mark Brown <broonie@xxxxxxxxxx> [190129 17:15]: > On Tue, Jan 29, 2019 at 09:11:51AM -0800, Tony Lindgren wrote: > > > OK. Let's see if Sebastian spots where pwm_vibrator_start() > > and pwm_vibrator_stop() might get called multiple times > > or something similar. > > Given that nobody has noticed that the driver stops working entirely > it's possible that the pattern is something like: > > > pwm_vibrator_start() > pwm_vibrator_stop() > pwm_vibrator_stop() > pwm_vibrator_start() > > so it's a temporary underflow that gets corrected (or it could be that > not many people are using mainline kernels on these systems). On your > system it's the dummy driver but presumably some other users have it > connected to actual regulators. Yeah that makes sense. Regards, Tony
