Hi Mark, On Fri, Mar 25, 2016 at 11:17:57AM +0000, Mark Brown wrote: > On Wed, Mar 23, 2016 at 09:22:36PM +0200, Ivaylo Dimitrov wrote: > > > Assigning a device group to a regulator does not change its state. To > > change the state of a regulator a message over the powerbus is required. > > Also, the check for the current state of a regulator should not count on > > a device group being assigned, but on the current resource state. > > How did this driver ever work then? It sounds like there must be > something else going on here. From my understanding of the twl4030 TRM assigning a device group means "<device group> wants this regulator enabled". It does not change the regulator mode (sleep vs normal or in regulator-framework terms: REGULATOR_STATUS_NORMAL vs REGULATOR_STATUS_STANDBY). It usually works, since the default state is normal. If the system is rebooted from a non-mainline kernel, which left the regulator in sleep/standby, nothing in the kernel switches it to normal. -- Sebastian
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