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regulator: core: Prioritise consumer mappings over regulator name

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Currently, when looking up a regulator supply, the regulator name
takes priority over the consumer mappings. As there are a lot of
regulator names that are in fairly common use (VDD, MICVDD, etc.) this
can easily lead to obtaining the wrong supply, when a system contains
two regulators that share a name.

The explicit consumer mappings contain much less ambiguity as they
specify both a name and a consumer device. As such prioritise those if
one exists and only fall back to the regulator name if there are no
matching explicit mappings.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2017-06-13 16:12:47 +01:00 committed by Mark Brown
parent 2ea659a9ef
commit 062171973e
1 changed files with 5 additions and 5 deletions
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10
drivers/regulator/core.c
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@ -1462,7 +1462,7 @@ static struct regulator_dev *regulator_lookup_by_name(const char *name)
static struct regulator_dev *regulator_dev_lookup(struct device *dev,
const char *supply)
{
struct regulator_dev *r;
struct regulator_dev *r = NULL;
struct device_node *node;
struct regulator_map *map;
const char *devname = NULL;
@ -1489,10 +1489,6 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
if (dev)
devname = dev_name(dev);
r = regulator_lookup_by_name(supply);
if (r)
return r;
mutex_lock(&regulator_list_mutex);
list_for_each_entry(map, &regulator_map_list, list) {
/* If the mapping has a device set up it must match */
@ -1508,6 +1504,10 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
}
mutex_unlock(&regulator_list_mutex);
if (r)
return r;
r = regulator_lookup_by_name(supply);
if (r)
return r;