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path: root/drivers/regulator/virtual.c
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Diffstat (limited to 'drivers/regulator/virtual.c')
-rw-r--r--drivers/regulator/virtual.c169
1 files changed, 87 insertions, 82 deletions
diff --git a/drivers/regulator/virtual.c b/drivers/regulator/virtual.c
index 5ddb464b1c3..6ff95b04598 100644
--- a/drivers/regulator/virtual.c
+++ b/drivers/regulator/virtual.c
@@ -15,11 +15,13 @@
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/module.h>
struct virtual_consumer_data {
struct mutex lock;
struct regulator *regulator;
- int enabled;
+ bool enabled;
int min_uV;
int max_uV;
int min_uA;
@@ -27,71 +29,81 @@ struct virtual_consumer_data {
unsigned int mode;
};
-static void update_voltage_constraints(struct virtual_consumer_data *data)
+static void update_voltage_constraints(struct device *dev,
+ struct virtual_consumer_data *data)
{
int ret;
if (data->min_uV && data->max_uV
&& data->min_uV <= data->max_uV) {
+ dev_dbg(dev, "Requesting %d-%duV\n",
+ data->min_uV, data->max_uV);
ret = regulator_set_voltage(data->regulator,
- data->min_uV, data->max_uV);
+ data->min_uV, data->max_uV);
if (ret != 0) {
- printk(KERN_ERR "regulator_set_voltage() failed: %d\n",
- ret);
+ dev_err(dev,
+ "regulator_set_voltage() failed: %d\n", ret);
return;
}
}
if (data->min_uV && data->max_uV && !data->enabled) {
+ dev_dbg(dev, "Enabling regulator\n");
ret = regulator_enable(data->regulator);
if (ret == 0)
- data->enabled = 1;
+ data->enabled = true;
else
- printk(KERN_ERR "regulator_enable() failed: %d\n",
+ dev_err(dev, "regulator_enable() failed: %d\n",
ret);
}
if (!(data->min_uV && data->max_uV) && data->enabled) {
+ dev_dbg(dev, "Disabling regulator\n");
ret = regulator_disable(data->regulator);
if (ret == 0)
- data->enabled = 0;
+ data->enabled = false;
else
- printk(KERN_ERR "regulator_disable() failed: %d\n",
+ dev_err(dev, "regulator_disable() failed: %d\n",
ret);
}
}
-static void update_current_limit_constraints(struct virtual_consumer_data
- *data)
+static void update_current_limit_constraints(struct device *dev,
+ struct virtual_consumer_data *data)
{
int ret;
if (data->max_uA
&& data->min_uA <= data->max_uA) {
+ dev_dbg(dev, "Requesting %d-%duA\n",
+ data->min_uA, data->max_uA);
ret = regulator_set_current_limit(data->regulator,
data->min_uA, data->max_uA);
if (ret != 0) {
- pr_err("regulator_set_current_limit() failed: %d\n",
- ret);
+ dev_err(dev,
+ "regulator_set_current_limit() failed: %d\n",
+ ret);
return;
}
}
if (data->max_uA && !data->enabled) {
+ dev_dbg(dev, "Enabling regulator\n");
ret = regulator_enable(data->regulator);
if (ret == 0)
- data->enabled = 1;
+ data->enabled = true;
else
- printk(KERN_ERR "regulator_enable() failed: %d\n",
+ dev_err(dev, "regulator_enable() failed: %d\n",
ret);
}
if (!(data->min_uA && data->max_uA) && data->enabled) {
+ dev_dbg(dev, "Disabling regulator\n");
ret = regulator_disable(data->regulator);
if (ret == 0)
- data->enabled = 0;
+ data->enabled = false;
else
- printk(KERN_ERR "regulator_disable() failed: %d\n",
+ dev_err(dev, "regulator_disable() failed: %d\n",
ret);
}
}
@@ -109,13 +121,13 @@ static ssize_t set_min_uV(struct device *dev, struct device_attribute *attr,
struct virtual_consumer_data *data = dev_get_drvdata(dev);
long val;
- if (strict_strtol(buf, 10, &val) != 0)
+ if (kstrtol(buf, 10, &val) != 0)
return count;
mutex_lock(&data->lock);
data->min_uV = val;
- update_voltage_constraints(data);
+ update_voltage_constraints(dev, data);
mutex_unlock(&data->lock);
@@ -135,13 +147,13 @@ static ssize_t set_max_uV(struct device *dev, struct device_attribute *attr,
struct virtual_consumer_data *data = dev_get_drvdata(dev);
long val;
- if (strict_strtol(buf, 10, &val) != 0)
+ if (kstrtol(buf, 10, &val) != 0)
return count;
mutex_lock(&data->lock);
data->max_uV = val;
- update_voltage_constraints(data);
+ update_voltage_constraints(dev, data);
mutex_unlock(&data->lock);
@@ -161,13 +173,13 @@ static ssize_t set_min_uA(struct device *dev, struct device_attribute *attr,
struct virtual_consumer_data *data = dev_get_drvdata(dev);
long val;
- if (strict_strtol(buf, 10, &val) != 0)
+ if (kstrtol(buf, 10, &val) != 0)
return count;
mutex_lock(&data->lock);
data->min_uA = val;
- update_current_limit_constraints(data);
+ update_current_limit_constraints(dev, data);
mutex_unlock(&data->lock);
@@ -187,13 +199,13 @@ static ssize_t set_max_uA(struct device *dev, struct device_attribute *attr,
struct virtual_consumer_data *data = dev_get_drvdata(dev);
long val;
- if (strict_strtol(buf, 10, &val) != 0)
+ if (kstrtol(buf, 10, &val) != 0)
return count;
mutex_lock(&data->lock);
data->max_uA = val;
- update_current_limit_constraints(data);
+ update_current_limit_constraints(dev, data);
mutex_unlock(&data->lock);
@@ -226,13 +238,17 @@ static ssize_t set_mode(struct device *dev, struct device_attribute *attr,
unsigned int mode;
int ret;
- if (strncmp(buf, "fast", strlen("fast")) == 0)
+ /*
+ * sysfs_streq() doesn't need the \n's, but we add them so the strings
+ * will be shared with show_mode(), above.
+ */
+ if (sysfs_streq(buf, "fast\n"))
mode = REGULATOR_MODE_FAST;
- else if (strncmp(buf, "normal", strlen("normal")) == 0)
+ else if (sysfs_streq(buf, "normal\n"))
mode = REGULATOR_MODE_NORMAL;
- else if (strncmp(buf, "idle", strlen("idle")) == 0)
+ else if (sysfs_streq(buf, "idle\n"))
mode = REGULATOR_MODE_IDLE;
- else if (strncmp(buf, "standby", strlen("standby")) == 0)
+ else if (sysfs_streq(buf, "standby\n"))
mode = REGULATOR_MODE_STANDBY;
else {
dev_err(dev, "Configuring invalid mode\n");
@@ -250,44 +266,52 @@ static ssize_t set_mode(struct device *dev, struct device_attribute *attr,
return count;
}
-static DEVICE_ATTR(min_microvolts, 0666, show_min_uV, set_min_uV);
-static DEVICE_ATTR(max_microvolts, 0666, show_max_uV, set_max_uV);
-static DEVICE_ATTR(min_microamps, 0666, show_min_uA, set_min_uA);
-static DEVICE_ATTR(max_microamps, 0666, show_max_uA, set_max_uA);
-static DEVICE_ATTR(mode, 0666, show_mode, set_mode);
-
-struct device_attribute *attributes[] = {
- &dev_attr_min_microvolts,
- &dev_attr_max_microvolts,
- &dev_attr_min_microamps,
- &dev_attr_max_microamps,
- &dev_attr_mode,
+static DEVICE_ATTR(min_microvolts, 0664, show_min_uV, set_min_uV);
+static DEVICE_ATTR(max_microvolts, 0664, show_max_uV, set_max_uV);
+static DEVICE_ATTR(min_microamps, 0664, show_min_uA, set_min_uA);
+static DEVICE_ATTR(max_microamps, 0664, show_max_uA, set_max_uA);
+static DEVICE_ATTR(mode, 0664, show_mode, set_mode);
+
+static struct attribute *regulator_virtual_attributes[] = {
+ &dev_attr_min_microvolts.attr,
+ &dev_attr_max_microvolts.attr,
+ &dev_attr_min_microamps.attr,
+ &dev_attr_max_microamps.attr,
+ &dev_attr_mode.attr,
+ NULL
+};
+
+static const struct attribute_group regulator_virtual_attr_group = {
+ .attrs = regulator_virtual_attributes,
};
-static int regulator_virtual_consumer_probe(struct platform_device *pdev)
+static int regulator_virtual_probe(struct platform_device *pdev)
{
- char *reg_id = pdev->dev.platform_data;
+ char *reg_id = dev_get_platdata(&pdev->dev);
struct virtual_consumer_data *drvdata;
- int ret, i;
+ int ret;
- drvdata = kzalloc(sizeof(struct virtual_consumer_data), GFP_KERNEL);
- if (drvdata == NULL) {
- ret = -ENOMEM;
- goto err;
- }
+ drvdata = devm_kzalloc(&pdev->dev, sizeof(struct virtual_consumer_data),
+ GFP_KERNEL);
+ if (drvdata == NULL)
+ return -ENOMEM;
mutex_init(&drvdata->lock);
- drvdata->regulator = regulator_get(&pdev->dev, reg_id);
+ drvdata->regulator = devm_regulator_get(&pdev->dev, reg_id);
if (IS_ERR(drvdata->regulator)) {
ret = PTR_ERR(drvdata->regulator);
- goto err;
+ dev_err(&pdev->dev, "Failed to obtain supply '%s': %d\n",
+ reg_id, ret);
+ return ret;
}
- for (i = 0; i < ARRAY_SIZE(attributes); i++) {
- ret = device_create_file(&pdev->dev, attributes[i]);
- if (ret != 0)
- goto err;
+ ret = sysfs_create_group(&pdev->dev.kobj,
+ &regulator_virtual_attr_group);
+ if (ret != 0) {
+ dev_err(&pdev->dev,
+ "Failed to create attribute group: %d\n", ret);
+ return ret;
}
drvdata->mode = regulator_get_mode(drvdata->regulator);
@@ -295,51 +319,32 @@ static int regulator_virtual_consumer_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, drvdata);
return 0;
-
-err:
- for (i = 0; i < ARRAY_SIZE(attributes); i++)
- device_remove_file(&pdev->dev, attributes[i]);
- kfree(drvdata);
- return ret;
}
-static int regulator_virtual_consumer_remove(struct platform_device *pdev)
+static int regulator_virtual_remove(struct platform_device *pdev)
{
struct virtual_consumer_data *drvdata = platform_get_drvdata(pdev);
- int i;
- for (i = 0; i < ARRAY_SIZE(attributes); i++)
- device_remove_file(&pdev->dev, attributes[i]);
+ sysfs_remove_group(&pdev->dev.kobj, &regulator_virtual_attr_group);
+
if (drvdata->enabled)
regulator_disable(drvdata->regulator);
- regulator_put(drvdata->regulator);
-
- kfree(drvdata);
return 0;
}
static struct platform_driver regulator_virtual_consumer_driver = {
- .probe = regulator_virtual_consumer_probe,
- .remove = regulator_virtual_consumer_remove,
+ .probe = regulator_virtual_probe,
+ .remove = regulator_virtual_remove,
.driver = {
.name = "reg-virt-consumer",
+ .owner = THIS_MODULE,
},
};
-
-static int __init regulator_virtual_consumer_init(void)
-{
- return platform_driver_register(&regulator_virtual_consumer_driver);
-}
-module_init(regulator_virtual_consumer_init);
-
-static void __exit regulator_virtual_consumer_exit(void)
-{
- platform_driver_unregister(&regulator_virtual_consumer_driver);
-}
-module_exit(regulator_virtual_consumer_exit);
+module_platform_driver(regulator_virtual_consumer_driver);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Virtual regulator consumer");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:reg-virt-consumer");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:51:20 +0000