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authorMark Brown <broonie@kernel.org>2015-02-08 11:16:22 +0800
committerMark Brown <broonie@kernel.org>2015-02-08 11:16:22 +0800
commitfca8e13f50e604436951ce59736046a79258ec20 (patch)
tree710bcf636a9ca0efafefffcae2009e3a3c107483
parenta9877b606ceb40e5b7e08b62d5f10c65b761dcff (diff)
parentf47531b1aa86e0bef898c1ff810f8486f469b111 (diff)
Merge remote-tracking branch 'regulator/topic/dt-cb' into regulator-next
-rw-r--r--drivers/regulator/core.c22
-rw-r--r--drivers/regulator/internal.h2
-rw-r--r--drivers/regulator/of_regulator.c11
-rw-r--r--include/linux/regulator/driver.h13
4 files changed, 43 insertions, 5 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 43644ba52aae..e607bafa7c09 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3561,7 +3561,7 @@ static void rdev_init_debugfs(struct regulator_dev *rdev)
/**
* regulator_register - register regulator
* @regulator_desc: regulator to register
- * @config: runtime configuration for regulator
+ * @cfg: runtime configuration for regulator
*
* Called by regulator drivers to register a regulator.
* Returns a valid pointer to struct regulator_dev on success
@@ -3569,20 +3569,21 @@ static void rdev_init_debugfs(struct regulator_dev *rdev)
*/
struct regulator_dev *
regulator_register(const struct regulator_desc *regulator_desc,
- const struct regulator_config *config)
+ const struct regulator_config *cfg)
{
const struct regulation_constraints *constraints = NULL;
const struct regulator_init_data *init_data;
+ struct regulator_config *config = NULL;
static atomic_t regulator_no = ATOMIC_INIT(-1);
struct regulator_dev *rdev;
struct device *dev;
int ret, i;
const char *supply = NULL;
- if (regulator_desc == NULL || config == NULL)
+ if (regulator_desc == NULL || cfg == NULL)
return ERR_PTR(-EINVAL);
- dev = config->dev;
+ dev = cfg->dev;
WARN_ON(!dev);
if (regulator_desc->name == NULL || regulator_desc->ops == NULL)
@@ -3612,7 +3613,17 @@ regulator_register(const struct regulator_desc *regulator_desc,
if (rdev == NULL)
return ERR_PTR(-ENOMEM);
- init_data = regulator_of_get_init_data(dev, regulator_desc,
+ /*
+ * Duplicate the config so the driver could override it after
+ * parsing init data.
+ */
+ config = kmemdup(cfg, sizeof(*cfg), GFP_KERNEL);
+ if (config == NULL) {
+ kfree(rdev);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ init_data = regulator_of_get_init_data(dev, regulator_desc, config,
&rdev->dev.of_node);
if (!init_data) {
init_data = config->init_data;
@@ -3735,6 +3746,7 @@ add_dev:
rdev_init_debugfs(rdev);
out:
mutex_unlock(&regulator_list_mutex);
+ kfree(config);
return rdev;
unset_supplies:
diff --git a/drivers/regulator/internal.h b/drivers/regulator/internal.h
index 80ba2a35a04b..c74ac8734023 100644
--- a/drivers/regulator/internal.h
+++ b/drivers/regulator/internal.h
@@ -38,11 +38,13 @@ struct regulator {
#ifdef CONFIG_OF
struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
+ struct regulator_config *config,
struct device_node **node);
#else
static inline struct regulator_init_data *
regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
+ struct regulator_config *config,
struct device_node **node)
{
return NULL;
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
index 91eaaf010524..24e812c48d93 100644
--- a/drivers/regulator/of_regulator.c
+++ b/drivers/regulator/of_regulator.c
@@ -270,6 +270,7 @@ EXPORT_SYMBOL_GPL(of_regulator_match);
struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
const struct regulator_desc *desc,
+ struct regulator_config *config,
struct device_node **node)
{
struct device_node *search, *child;
@@ -307,6 +308,16 @@ struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
break;
}
+ if (desc->of_parse_cb) {
+ if (desc->of_parse_cb(child, desc, config)) {
+ dev_err(dev,
+ "driver callback failed to parse DT for regulator %s\n",
+ child->name);
+ init_data = NULL;
+ break;
+ }
+ }
+
of_node_get(child);
*node = child;
break;
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 5f1e9ca47417..d4ad5b5a02bb 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -21,6 +21,7 @@
struct regmap;
struct regulator_dev;
+struct regulator_config;
struct regulator_init_data;
struct regulator_enable_gpio;
@@ -205,6 +206,15 @@ enum regulator_type {
* @supply_name: Identifying the regulator supply
* @of_match: Name used to identify regulator in DT.
* @regulators_node: Name of node containing regulator definitions in DT.
+ * @of_parse_cb: Optional callback called only if of_match is present.
+ * Will be called for each regulator parsed from DT, during
+ * init_data parsing.
+ * The regulator_config passed as argument to the callback will
+ * be a copy of config passed to regulator_register, valid only
+ * for this particular call. Callback may freely change the
+ * config but it cannot store it for later usage.
+ * Callback should return 0 on success or negative ERRNO
+ * indicating failure.
* @id: Numerical identifier for the regulator.
* @ops: Regulator operations table.
* @irq: Interrupt number for the regulator.
@@ -251,6 +261,9 @@ struct regulator_desc {
const char *supply_name;
const char *of_match;
const char *regulators_node;
+ int (*of_parse_cb)(struct device_node *,
+ const struct regulator_desc *,
+ struct regulator_config *);
int id;
bool continuous_voltage_range;
unsigned n_voltages;