regulator: tps80031: adjust tolerance if req minuV > dev minuV
[linux-2.6.git] / drivers / regulator / virtual.c
index addc032..ee0b161 100644 (file)
 #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;
@@ -49,7 +51,7 @@ static void update_voltage_constraints(struct device *dev,
                dev_dbg(dev, "Enabling regulator\n");
                ret = regulator_enable(data->regulator);
                if (ret == 0)
-                       data->enabled = 1;
+                       data->enabled = true;
                else
                        dev_err(dev, "regulator_enable() failed: %d\n",
                                ret);
@@ -59,7 +61,7 @@ static void update_voltage_constraints(struct device *dev,
                dev_dbg(dev, "Disabling regulator\n");
                ret = regulator_disable(data->regulator);
                if (ret == 0)
-                       data->enabled = 0;
+                       data->enabled = false;
                else
                        dev_err(dev, "regulator_disable() failed: %d\n",
                                ret);
@@ -89,7 +91,7 @@ static void update_current_limit_constraints(struct device *dev,
                dev_dbg(dev, "Enabling regulator\n");
                ret = regulator_enable(data->regulator);
                if (ret == 0)
-                       data->enabled = 1;
+                       data->enabled = true;
                else
                        dev_err(dev, "regulator_enable() failed: %d\n",
                                ret);
@@ -99,7 +101,7 @@ static void update_current_limit_constraints(struct device *dev,
                dev_dbg(dev, "Disabling regulator\n");
                ret = regulator_disable(data->regulator);
                if (ret == 0)
-                       data->enabled = 0;
+                       data->enabled = false;
                else
                        dev_err(dev, "regulator_disable() failed: %d\n",
                                ret);
@@ -270,24 +272,28 @@ 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);
 
-static struct device_attribute *attributes[] = {
-       &dev_attr_min_microvolts,
-       &dev_attr_max_microvolts,
-       &dev_attr_min_microamps,
-       &dev_attr_max_microamps,
-       &dev_attr_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 int regulator_virtual_consumer_probe(struct platform_device *pdev)
+static const struct attribute_group regulator_virtual_attr_group = {
+       .attrs  = regulator_virtual_attributes,
+};
+
+static int __devinit regulator_virtual_probe(struct platform_device *pdev)
 {
        char *reg_id = pdev->dev.platform_data;
        struct virtual_consumer_data *drvdata;
-       int ret, i;
+       int ret;
 
        drvdata = kzalloc(sizeof(struct virtual_consumer_data), GFP_KERNEL);
-       if (drvdata == NULL) {
+       if (drvdata == NULL)
                return -ENOMEM;
-       }
 
        mutex_init(&drvdata->lock);
 
@@ -299,13 +305,12 @@ static int regulator_virtual_consumer_probe(struct platform_device *pdev)
                goto err;
        }
 
-       for (i = 0; i < ARRAY_SIZE(attributes); i++) {
-               ret = device_create_file(&pdev->dev, attributes[i]);
-               if (ret != 0) {
-                       dev_err(&pdev->dev, "Failed to create attr %d: %d\n",
-                               i, ret);
-                       goto err_regulator;
-               }
+       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);
+               goto err_regulator;
        }
 
        drvdata->mode = regulator_get_mode(drvdata->regulator);
@@ -317,48 +322,37 @@ static int regulator_virtual_consumer_probe(struct platform_device *pdev)
 err_regulator:
        regulator_put(drvdata->regulator);
 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 __devexit 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);
 
+       platform_set_drvdata(pdev, NULL);
+
        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         = __devexit_p(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");