1 files changed, 47 insertions, 83 deletions

diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
index 36509ae3208..2566c43dd1e 100644
--- a/drivers/hwmon/gpio-fan.c
+++ b/drivers/hwmon/gpio-fan.c
@@ -31,6 +31,7 @@
 #include <linux/hwmon.h>
 #include <linux/gpio.h>
 #include <linux/gpio-fan.h>
+#include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/of_gpio.h>
 
@@ -105,10 +106,6 @@ static int fan_alarm_init(struct gpio_fan_data *fan_data,
 	if (err)
 		return err;
 
-	err = device_create_file(&pdev->dev, &dev_attr_fan1_alarm);
-	if (err)
-		return err;
-
 	/*
 	 * If the alarm GPIO don't support interrupts, just leave
 	 * without initializing the fail notification support.
@@ -121,23 +118,9 @@ static int fan_alarm_init(struct gpio_fan_data *fan_data,
 	irq_set_irq_type(alarm_irq, IRQ_TYPE_EDGE_BOTH);
 	err = devm_request_irq(&pdev->dev, alarm_irq, fan_alarm_irq_handler,
 			       IRQF_SHARED, "GPIO fan alarm", fan_data);
-	if (err)
-		goto err_free_sysfs;
-
-	return 0;
-
-err_free_sysfs:
-	device_remove_file(&pdev->dev, &dev_attr_fan1_alarm);
 	return err;
 }
 
-static void fan_alarm_free(struct gpio_fan_data *fan_data)
-{
-	struct platform_device *pdev = fan_data->pdev;
-
-	device_remove_file(&pdev->dev, &dev_attr_fan1_alarm);
-}
-
 /*
  * Control GPIOs.
  */
@@ -187,7 +170,7 @@ static int get_fan_speed_index(struct gpio_fan_data *fan_data)
 	dev_warn(&fan_data->pdev->dev,
 		 "missing speed array entry for GPIO value 0x%x\n", ctrl_val);
 
-	return -EINVAL;
+	return -ENODEV;
 }
 
 static int rpm_to_speed_index(struct gpio_fan_data *fan_data, int rpm)
@@ -336,8 +319,23 @@ static DEVICE_ATTR(fan1_max, S_IRUGO, show_rpm_max, NULL);
 static DEVICE_ATTR(fan1_input, S_IRUGO, show_rpm, NULL);
 static DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, show_rpm, set_rpm);
 
-static struct attribute *gpio_fan_ctrl_attributes[] = {
-	&dev_attr_pwm1.attr,
+static umode_t gpio_fan_is_visible(struct kobject *kobj,
+				   struct attribute *attr, int index)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct gpio_fan_data *data = dev_get_drvdata(dev);
+
+	if (index == 0 && !data->alarm)
+		return 0;
+	if (index > 0 && !data->ctrl)
+		return 0;
+
+	return attr->mode;
+}
+
+static struct attribute *gpio_fan_attributes[] = {
+	&dev_attr_fan1_alarm.attr,		/* 0 */
+	&dev_attr_pwm1.attr,			/* 1 */
 	&dev_attr_pwm1_enable.attr,
 	&dev_attr_pwm1_mode.attr,
 	&dev_attr_fan1_input.attr,
@@ -347,8 +345,14 @@ static struct attribute *gpio_fan_ctrl_attributes[] = {
 	NULL
 };
 
-static const struct attribute_group gpio_fan_ctrl_group = {
-	.attrs = gpio_fan_ctrl_attributes,
+static const struct attribute_group gpio_fan_group = {
+	.attrs = gpio_fan_attributes,
+	.is_visible = gpio_fan_is_visible,
+};
+
+static const struct attribute_group *gpio_fan_groups[] = {
+	&gpio_fan_group,
+	NULL
 };
 
 static int fan_ctrl_init(struct gpio_fan_data *fan_data,
@@ -377,32 +381,11 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
 	fan_data->pwm_enable = true; /* Enable manual fan speed control. */
 	fan_data->speed_index = get_fan_speed_index(fan_data);
 	if (fan_data->speed_index < 0)
-		return -ENODEV;
-
-	err = sysfs_create_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
-	return err;
-}
-
-static void fan_ctrl_free(struct gpio_fan_data *fan_data)
-{
-	struct platform_device *pdev = fan_data->pdev;
-
-	sysfs_remove_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
-}
-
-/*
- * Platform driver.
- */
+		return fan_data->speed_index;
 
-static ssize_t show_name(struct device *dev,
-			 struct device_attribute *attr, char *buf)
-{
-	return sprintf(buf, "gpio-fan\n");
+	return 0;
 }
 
-static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
-
-
 #ifdef CONFIG_OF_GPIO
 /*
  * Translate OpenFirmware node properties into platform_data
@@ -422,7 +405,7 @@ static int gpio_fan_get_of_pdata(struct device *dev,
 
 	/* Fill GPIO pin array */
 	pdata->num_ctrl = of_gpio_count(node);
-	if (!pdata->num_ctrl) {
+	if (pdata->num_ctrl <= 0) {
 		dev_err(dev, "gpios DT property empty / missing");
 		return -ENODEV;
 	}
@@ -477,7 +460,7 @@ static int gpio_fan_get_of_pdata(struct device *dev,
 	pdata->speed = speed;
 
 	/* Alarm GPIO if one exists */
-	if (of_gpio_named_count(node, "alarm-gpios")) {
+	if (of_gpio_named_count(node, "alarm-gpios") > 0) {
 		struct gpio_fan_alarm *alarm;
 		int val;
 		enum of_gpio_flags flags;
@@ -499,17 +482,17 @@ static int gpio_fan_get_of_pdata(struct device *dev,
 	return 0;
 }
 
-static struct of_device_id of_gpio_fan_match[] __devinitdata = {
+static const struct of_device_id of_gpio_fan_match[] = {
 	{ .compatible = "gpio-fan", },
 	{},
 };
 #endif /* CONFIG_OF_GPIO */
 
-static int __devinit gpio_fan_probe(struct platform_device *pdev)
+static int gpio_fan_probe(struct platform_device *pdev)
 {
 	int err;
 	struct gpio_fan_data *fan_data;
-	struct gpio_fan_platform_data *pdata = pdev->dev.platform_data;
+	struct gpio_fan_platform_data *pdata = dev_get_platdata(&pdev->dev);
 
 #ifdef CONFIG_OF_GPIO
 	if (!pdata) {
@@ -546,51 +529,30 @@ static int __devinit gpio_fan_probe(struct platform_device *pdev)
 
 	/* Configure control GPIOs if available. */
 	if (pdata->ctrl && pdata->num_ctrl > 0) {
-		if (!pdata->speed || pdata->num_speed <= 1) {
-			err = -EINVAL;
-			goto err_free_alarm;
-		}
+		if (!pdata->speed || pdata->num_speed <= 1)
+			return -EINVAL;
 		err = fan_ctrl_init(fan_data, pdata);
 		if (err)
-			goto err_free_alarm;
+			return err;
 	}
 
-	err = device_create_file(&pdev->dev, &dev_attr_name);
-	if (err)
-		goto err_free_ctrl;
-
 	/* Make this driver part of hwmon class. */
-	fan_data->hwmon_dev = hwmon_device_register(&pdev->dev);
-	if (IS_ERR(fan_data->hwmon_dev)) {
-		err = PTR_ERR(fan_data->hwmon_dev);
-		goto err_remove_name;
-	}
+	fan_data->hwmon_dev = hwmon_device_register_with_groups(&pdev->dev,
+						"gpio_fan", fan_data,
+						gpio_fan_groups);
+	if (IS_ERR(fan_data->hwmon_dev))
+		return PTR_ERR(fan_data->hwmon_dev);
 
 	dev_info(&pdev->dev, "GPIO fan initialized\n");
 
 	return 0;
-
-err_remove_name:
-	device_remove_file(&pdev->dev, &dev_attr_name);
-err_free_ctrl:
-	if (fan_data->ctrl)
-		fan_ctrl_free(fan_data);
-err_free_alarm:
-	if (fan_data->alarm)
-		fan_alarm_free(fan_data);
-	return err;
 }
 
-static int __devexit gpio_fan_remove(struct platform_device *pdev)
+static int gpio_fan_remove(struct platform_device *pdev)
 {
 	struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
 
 	hwmon_device_unregister(fan_data->hwmon_dev);
-	device_remove_file(&pdev->dev, &dev_attr_name);
-	if (fan_data->alarm)
-		fan_alarm_free(fan_data);
-	if (fan_data->ctrl)
-		fan_ctrl_free(fan_data);
 
 	return 0;
 }
@@ -619,18 +581,20 @@ static int gpio_fan_resume(struct device *dev)
 }
 
 static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);
-#define GPIO_FAN_PM	&gpio_fan_pm
+#define GPIO_FAN_PM	(&gpio_fan_pm)
 #else
 #define GPIO_FAN_PM	NULL
 #endif
 
 static struct platform_driver gpio_fan_driver = {
 	.probe		= gpio_fan_probe,
-	.remove		= __devexit_p(gpio_fan_remove),
+	.remove		= gpio_fan_remove,
 	.driver	= {
 		.name	= "gpio-fan",
 		.pm	= GPIO_FAN_PM,
+#ifdef CONFIG_OF_GPIO
 		.of_match_table = of_match_ptr(of_gpio_fan_match),
+#endif
 	},
 };