This fixes an integration issue with the regulator device tree bindings

which shook out in -rc.  The bindings were overly enthusiatic when
 deciding to set a voltage on a regulator and would try to set zero volts
 on an unconfigured regulator which isn't supported.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

This fixes an integration issue with the regulator device tree bindings
which shook out in -rc.  The bindings were overly enthusiatic when
deciding to set a voltage on a regulator and would try to set zero volts
on an unconfigured regulator which isn't supported.

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: Set apply_uV only when min and max voltages are defined

drivers/regulator/of_regulator.c

@@ -35,7 +35,7 @@ static void of_get_regulation_constraints(struct device_node *np,
 	if (constraints->min_uV != constraints->max_uV)
 		constraints->valid_ops_mask |= REGULATOR_CHANGE_VOLTAGE;
 	/* Only one voltage?  Then make sure it's set. */
-	if (constraints->min_uV == constraints->max_uV)
+	if (min_uV && max_uV && constraints->min_uV == constraints->max_uV)
 		constraints->apply_uV = true;
 
 	uV_offset = of_get_property(np, "regulator-microvolt-offset", NULL);