regulator: Refactor supply implementation to work as regular consumers

Currently the regulator supply implementation is somewhat complex and
fragile as it doesn't look like standard consumers but is instead a
parallel implementation. This causes issues with locking and reference
counting.

Move the implementation over to using standard consumers to address this.
Rather than only notifying the supply on the first enable/disable we do so
every time the regulator is enabled or disabled, simplifying locking as we
don't need to hold a lock on the consumer we are about to enable.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 1 insertions, 3 deletions

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 6c433b89c80d..1a80bc77517d 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -188,18 +188,16 @@ struct regulator_dev {
 
         /* lists we belong to */
         struct list_head list; /* list of all regulators */
-        struct list_head slist; /* list of supplied regulators */
 
         /* lists we own */
         struct list_head consumer_list; /* consumers we supply */
-        struct list_head supply_list; /* regulators we supply */
 
         struct blocking_notifier_head notifier;
         struct mutex mutex; /* consumer lock */
         struct module *owner;
         struct device dev;
         struct regulation_constraints *constraints;
-        struct regulator_dev *supply;   /* for tree */
+        struct regulator *supply;       /* for tree */
 
         void *reg_data;         /* regulator_dev data */