[PATCH 2/3] regulator: core: Link consumer with regulator driver

From: Pascal PAILLET-LME
Date: Thu Jul 05 2018 - 10:26:30 EST


From: pascal paillet <p.paillet@xxxxxx>

Add a device link between the consumer and the driver so that
the consumer is not suspended before the driver. The goal is to avoid
implementing suspend_late ops in regulator drivers.

Signed-off-by: pascal paillet <p.paillet@xxxxxx>
---
drivers/regulator/core.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 6ed568b..607ec47 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1740,6 +1740,8 @@ struct regulator *_regulator_get(struct device *dev, const char *id,
rdev->use_count = 0;
}

+ device_link_add(dev, &rdev->dev, DL_FLAG_STATELESS);
+
return regulator;
}

@@ -1829,9 +1831,21 @@ static void _regulator_put(struct regulator *regulator)

debugfs_remove_recursive(regulator->debugfs);

- /* remove any sysfs entries */
- if (regulator->dev)
+ if (regulator->dev) {
+ int count = 0;
+ struct regulator *r;
+
+ list_for_each_entry(r, &rdev->consumer_list, list)
+ if (r->dev == regulator->dev)
+ count++;
+
+ if (count == 1)
+ device_link_remove(regulator->dev, &rdev->dev);
+
+ /* remove any sysfs entries */
sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
+ }
+
regulator_lock(rdev);
list_del(&regulator->list);

--
1.9.1