diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index cf02e971467..0bf5ec2d581 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -33,6 +33,7 @@
 #include <linux/proc_fs.h>
 #include <linux/acpi.h>
 #include <linux/slab.h>
+#include <linux/regulator/machine.h>
 #ifdef CONFIG_X86
 #include <asm/mpspec.h>
 #endif
@@ -921,6 +922,14 @@ void __init acpi_early_init(void)
 		goto error0;
 	}
 
+	/*
+	 * If the system is using ACPI then we can be reasonably
+	 * confident that any regulators are managed by the firmware
+	 * so tell the regulator core it has everything it needs to
+	 * know.
+	 */
+	regulator_has_full_constraints();
+
 	return;
 
       error0: