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-rw-r--r--drivers/regulator/core.c212
-rw-r--r--include/linux/regulator/consumer.h2
-rw-r--r--include/linux/regulator/driver.h1
3 files changed, 177 insertions, 38 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index a4a8a6dc60c4..669418bc99aa 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1316,6 +1316,54 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
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 @@ found:
goto out;
}
+ ret = regulator_resolve_supply(rdev);
+ if (ret < 0) {
+ regulator = ERR_PTR(ret);
+ goto out;
+ }
+
if (!try_module_get(rdev->owner))
goto out;
@@ -3499,7 +3553,18 @@ static struct class regulator_class = {
static void rdev_init_debugfs(struct regulator_dev *rdev)
{
- rdev->debugfs = debugfs_create_dir(rdev_get_name(rdev), debugfs_root);
+ struct device *parent = rdev->dev.parent;
+ const char *rname = rdev_get_name(rdev);
+ char name[NAME_MAX];
+
+ /* Avoid duplicate debugfs directory names */
+ if (parent && rname == rdev->desc->name) {
+ snprintf(name, sizeof(name), "%s-%s", dev_name(parent),
+ rname);
+ rname = name;
+ }
+
+ rdev->debugfs = debugfs_create_dir(rname, debugfs_root);
if (!rdev->debugfs) {
rdev_warn(rdev, "Failed to create debugfs directory\n");
return;
@@ -3533,7 +3598,6 @@ regulator_register(const struct regulator_desc *regulator_desc,
struct regulator_dev *rdev;
struct device *dev;
int ret, i;
- const char *supply = NULL;
if (regulator_desc == NULL || cfg == NULL)
return ERR_PTR(-EINVAL);
@@ -3641,41 +3705,10 @@ regulator_register(const struct regulator_desc *regulator_desc,
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;
-
- if (supply) {
- struct regulator_dev *r;
-
- r = regulator_dev_lookup(dev, supply, &ret);
+ rdev->supply_name = regulator_desc->supply_name;
- 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++) {
@@ -3702,8 +3735,6 @@ unset_supplies:
unset_regulator_supplies(rdev);
scrub:
- if (rdev->supply)
- _regulator_put(rdev->supply);
regulator_ena_gpio_free(rdev);
kfree(rdev->constraints);
wash:
@@ -3936,6 +3967,110 @@ static const struct file_operations supply_map_fops = {
#endif
};
+#ifdef CONFIG_DEBUG_FS
+static void regulator_summary_show_subtree(struct seq_file *s,
+ struct regulator_dev *rdev,
+ int level)
+{
+ struct list_head *list = s->private;
+ struct regulator_dev *child;
+ struct regulation_constraints *c;
+ struct regulator *consumer;
+
+ if (!rdev)
+ return;
+
+ seq_printf(s, "%*s%-*s %3d %4d %6d ",
+ level * 3 + 1, "",
+ 30 - level * 3, rdev_get_name(rdev),
+ rdev->use_count, rdev->open_count, rdev->bypass_count);
+
+ seq_printf(s, "%5dmV ", _regulator_get_voltage(rdev) / 1000);
+ seq_printf(s, "%5dmA ", _regulator_get_current_limit(rdev) / 1000);
+
+ c = rdev->constraints;
+ if (c) {
+ switch (rdev->desc->type) {
+ case REGULATOR_VOLTAGE:
+ seq_printf(s, "%5dmV %5dmV ",
+ c->min_uV / 1000, c->max_uV / 1000);
+ break;
+ case REGULATOR_CURRENT:
+ seq_printf(s, "%5dmA %5dmA ",
+ c->min_uA / 1000, c->max_uA / 1000);
+ break;
+ }
+ }
+
+ seq_puts(s, "\n");
+
+ list_for_each_entry(consumer, &rdev->consumer_list, list) {
+ if (consumer->dev->class == &regulator_class)
+ continue;
+
+ seq_printf(s, "%*s%-*s ",
+ (level + 1) * 3 + 1, "",
+ 30 - (level + 1) * 3, dev_name(consumer->dev));
+
+ switch (rdev->desc->type) {
+ case REGULATOR_VOLTAGE:
+ seq_printf(s, "%37dmV %5dmV",
+ consumer->min_uV / 1000,
+ consumer->max_uV / 1000);
+ break;
+ case REGULATOR_CURRENT:
+ break;
+ }
+
+ seq_puts(s, "\n");
+ }
+
+ list_for_each_entry(child, list, list) {
+ /* handle only non-root regulators supplied by current rdev */
+ if (!child->supply || child->supply->rdev != rdev)
+ continue;
+
+ regulator_summary_show_subtree(s, child, level + 1);
+ }
+}
+
+static int regulator_summary_show(struct seq_file *s, void *data)
+{
+ struct list_head *list = s->private;
+ struct regulator_dev *rdev;
+
+ seq_puts(s, " regulator use open bypass voltage current min max\n");
+ seq_puts(s, "-------------------------------------------------------------------------------\n");
+
+ mutex_lock(&regulator_list_mutex);
+
+ list_for_each_entry(rdev, list, list) {
+ if (rdev->supply)
+ continue;
+
+ regulator_summary_show_subtree(s, rdev, 0);
+ }
+
+ mutex_unlock(&regulator_list_mutex);
+
+ return 0;
+}
+
+static int regulator_summary_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, regulator_summary_show, inode->i_private);
+}
+#endif
+
+static const struct file_operations regulator_summary_fops = {
+#ifdef CONFIG_DEBUG_FS
+ .open = regulator_summary_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+#endif
+};
+
static int __init regulator_init(void)
{
int ret;
@@ -3949,6 +4084,9 @@ static int __init regulator_init(void)
debugfs_create_file("supply_map", 0444, debugfs_root, NULL,
&supply_map_fops);
+ debugfs_create_file("regulator_summary", 0444, debugfs_root,
+ &regulator_list, &regulator_summary_fops);
+
regulator_dummy_init();
return ret;
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index d17e1ff7ad01..aeacd624a794 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -114,7 +114,7 @@ struct regmap;
#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 045f709cb89b..3429e81beca0 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -367,6 +367,7 @@ struct regulator_dev {
struct device dev;
struct regulation_constraints *constraints;
struct regulator *supply; /* for tree */
+ const char *supply_name;
struct regmap *regmap;
struct delayed_work disable_work;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 23:13:06 +0000