[alsa-devel] How should SGTL5000 codec driver adapt to dummy regulator change?

Mark,

The sgtl5000_enable_regulators() function in SGTL5000 codec driver makes the decision whether an external VDDD supply is available by checking the return of regulator_bulk_get() call. It used to work because dummy regulator did not play in there, and if regulator_bulk_get() fails, most likely it's only because there is no external VDDD supply. But with commit 4ddfebd (regulator: core: Provide a dummy regulator with full constraints) merged, the regulator_bulk_get() will always succeed. It breaks the driver's assumption. What's your suggestion to the problem?

Shawn