Merge branch 'topic/debugfs' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-core
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 0ea0a01..cd0ca07 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1316,6 +1316,54 @@
return NULL;
}
+static int regulator_resolve_supply(struct regulator_dev *rdev)
+{
+ struct regulator_dev *r;
+ struct device *dev = rdev->dev.parent;
+ int ret;
+
+ /* No supply to resovle? */
+ if (!rdev->supply_name)
+ return 0;
+
+ /* Supply already resolved? */
+ if (rdev->supply)
+ return 0;
+
+ r = regulator_dev_lookup(dev, rdev->supply_name, &ret);
+ if (ret == -ENODEV) {
+ /*
+ * No supply was specified for this regulator and
+ * there will never be one.
+ */
+ return 0;
+ }
+
+ if (!r) {
+ dev_err(dev, "Failed to resolve %s-supply for %s\n",
+ rdev->supply_name, rdev->desc->name);
+ return -EPROBE_DEFER;
+ }
+
+ /* Recursively resolve the supply of the supply */
+ ret = regulator_resolve_supply(r);
+ if (ret < 0)
+ return ret;
+
+ ret = set_supply(rdev, r);
+ if (ret < 0)
+ return ret;
+
+ /* Cascade always-on state to supply */
+ if (_regulator_is_enabled(rdev)) {
+ ret = regulator_enable(rdev->supply);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
/* Internal regulator request function */
static struct regulator *_regulator_get(struct device *dev, const char *id,
bool exclusive, bool allow_dummy)
@@ -1385,6 +1433,12 @@
goto out;
}
+ ret = regulator_resolve_supply(rdev);
+ if (ret < 0) {
+ regulator = ERR_PTR(ret);
+ goto out;
+ }
+
if (!try_module_get(rdev->owner))
goto out;
@@ -3547,7 +3601,6 @@
struct regulator_dev *rdev;
struct device *dev;
int ret, i;
- const char *supply = NULL;
if (regulator_desc == NULL || cfg == NULL)
return ERR_PTR(-EINVAL);
@@ -3661,41 +3714,10 @@
goto scrub;
if (init_data && init_data->supply_regulator)
- supply = init_data->supply_regulator;
+ rdev->supply_name = init_data->supply_regulator;
else if (regulator_desc->supply_name)
- supply = regulator_desc->supply_name;
+ rdev->supply_name = regulator_desc->supply_name;
- if (supply) {
- struct regulator_dev *r;
-
- r = regulator_dev_lookup(dev, supply, &ret);
-
- if (ret == -ENODEV) {
- /*
- * No supply was specified for this regulator and
- * there will never be one.
- */
- ret = 0;
- goto add_dev;
- } else if (!r) {
- dev_err(dev, "Failed to find supply %s\n", supply);
- ret = -EPROBE_DEFER;
- goto scrub;
- }
-
- ret = set_supply(rdev, r);
- if (ret < 0)
- goto scrub;
-
- /* Enable supply if rail is enabled */
- if (_regulator_is_enabled(rdev)) {
- ret = regulator_enable(rdev->supply);
- if (ret < 0)
- goto scrub;
- }
- }
-
-add_dev:
/* add consumers devices */
if (init_data) {
for (i = 0; i < init_data->num_consumer_supplies; i++) {
@@ -3722,8 +3744,6 @@
unset_regulator_supplies(rdev);
scrub:
- if (rdev->supply)
- _regulator_put(rdev->supply);
regulator_ena_gpio_free(rdev);
kfree(rdev->constraints);
wash:
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index d17e1ff..aeacd62 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -114,7 +114,7 @@
#define REGULATOR_EVENT_OVER_TEMP 0x10
#define REGULATOR_EVENT_FORCE_DISABLE 0x20
#define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40
-#define REGULATOR_EVENT_DISABLE 0x80
+#define REGULATOR_EVENT_DISABLE 0x80
#define REGULATOR_EVENT_PRE_VOLTAGE_CHANGE 0x100
#define REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE 0x200
#define REGULATOR_EVENT_PRE_DISABLE 0x400
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index d4ad5b5..6d9fcd0 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -367,6 +367,7 @@
struct device dev;
struct regulation_constraints *constraints;
struct regulator *supply; /* for tree */
+ const char *supply_name;
struct regmap *regmap;
struct delayed_work disable_work;
