1 files changed, 163 insertions, 67 deletions

diff --git a/drivers/hwmon/pc87360.c b/drivers/hwmon/pc87360.c
index 236f9f29c624..3b8b81984ad4 100644
--- a/drivers/hwmon/pc87360.c
+++ b/drivers/hwmon/pc87360.c
@@ -328,6 +328,12 @@ static struct sensor_device_attribute fan_min[] = {
         SENSOR_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, set_fan_min, 2),
 };
 
+#define FAN_UNIT_ATTRS(X)       \
+        &fan_input[X].dev_attr.attr,    \
+        &fan_status[X].dev_attr.attr,   \
+        &fan_div[X].dev_attr.attr,      \
+        &fan_min[X].dev_attr.attr
+
 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr, char *buf)
 {
         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
@@ -360,6 +366,19 @@ static struct sensor_device_attribute pwm[] = {
         SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2),
 };
 
+static struct attribute * pc8736x_fan_attr_array[] = {
+        FAN_UNIT_ATTRS(0),
+        FAN_UNIT_ATTRS(1),
+        FAN_UNIT_ATTRS(2),
+        &pwm[0].dev_attr.attr,
+        &pwm[1].dev_attr.attr,
+        &pwm[2].dev_attr.attr,
+        NULL
+};
+static const struct attribute_group pc8736x_fan_group = {
+        .attrs = pc8736x_fan_attr_array,
+};
+
 static ssize_t show_in_input(struct device *dev, struct device_attribute *devattr, char *buf)
 {
         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
@@ -472,6 +491,61 @@ static struct sensor_device_attribute in_max[] = {
         SENSOR_ATTR(in10_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 10),
 };
 
+#define VIN_UNIT_ATTRS(X) \
+        &in_input[X].dev_attr.attr,     \
+        &in_status[X].dev_attr.attr,    \
+        &in_min[X].dev_attr.attr,       \
+        &in_max[X].dev_attr.attr
+
+static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct pc87360_data *data = pc87360_update_device(dev);
+        return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+
+static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct pc87360_data *data = pc87360_update_device(dev);
+        return sprintf(buf, "%u\n", data->vrm);
+}
+static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct pc87360_data *data = i2c_get_clientdata(client);
+        data->vrm = simple_strtoul(buf, NULL, 10);
+        return count;
+}
+static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
+
+static ssize_t show_in_alarms(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct pc87360_data *data = pc87360_update_device(dev);
+        return sprintf(buf, "%u\n", data->in_alarms);
+}
+static DEVICE_ATTR(alarms_in, S_IRUGO, show_in_alarms, NULL);
+
+static struct attribute *pc8736x_vin_attr_array[] = {
+        VIN_UNIT_ATTRS(0),
+        VIN_UNIT_ATTRS(1),
+        VIN_UNIT_ATTRS(2),
+        VIN_UNIT_ATTRS(3),
+        VIN_UNIT_ATTRS(4),
+        VIN_UNIT_ATTRS(5),
+        VIN_UNIT_ATTRS(6),
+        VIN_UNIT_ATTRS(7),
+        VIN_UNIT_ATTRS(8),
+        VIN_UNIT_ATTRS(9),
+        VIN_UNIT_ATTRS(10),
+        &dev_attr_cpu0_vid.attr,
+        &dev_attr_vrm.attr,
+        &dev_attr_alarms_in.attr,
+        NULL
+};
+static const struct attribute_group pc8736x_vin_group = {
+        .attrs = pc8736x_vin_attr_array,
+};
+
 static ssize_t show_therm_input(struct device *dev, struct device_attribute *devattr, char *buf)
 {
         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
@@ -590,33 +664,22 @@ static struct sensor_device_attribute therm_crit[] = {
                     show_therm_crit, set_therm_crit, 2+11),
 };
 
-static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
-{
-        struct pc87360_data *data = pc87360_update_device(dev);
-        return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
-}
-static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
-
-static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
-{
-        struct pc87360_data *data = pc87360_update_device(dev);
-        return sprintf(buf, "%u\n", data->vrm);
-}
-static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-        struct i2c_client *client = to_i2c_client(dev);
-        struct pc87360_data *data = i2c_get_clientdata(client);
-        data->vrm = simple_strtoul(buf, NULL, 10);
-        return count;
-}
-static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
-
-static ssize_t show_in_alarms(struct device *dev, struct device_attribute *attr, char *buf)
-{
-        struct pc87360_data *data = pc87360_update_device(dev);
-        return sprintf(buf, "%u\n", data->in_alarms);
-}
-static DEVICE_ATTR(alarms_in, S_IRUGO, show_in_alarms, NULL);
+#define THERM_UNIT_ATTRS(X) \
+        &therm_input[X].dev_attr.attr,  \
+        &therm_status[X].dev_attr.attr, \
+        &therm_min[X].dev_attr.attr,    \
+        &therm_max[X].dev_attr.attr,    \
+        &therm_crit[X].dev_attr.attr
+
+static struct attribute * pc8736x_therm_attr_array[] = {
+        THERM_UNIT_ATTRS(0),
+        THERM_UNIT_ATTRS(1),
+        THERM_UNIT_ATTRS(2),
+        NULL
+};
+static const struct attribute_group pc8736x_therm_group = {
+        .attrs = pc8736x_therm_attr_array,
+};
 
 static ssize_t show_temp_input(struct device *dev, struct device_attribute *devattr, char *buf)
 {
@@ -736,6 +799,25 @@ static ssize_t show_temp_alarms(struct device *dev, struct device_attribute *att
 }
 static DEVICE_ATTR(alarms_temp, S_IRUGO, show_temp_alarms, NULL);
 
+#define TEMP_UNIT_ATTRS(X) \
+        &temp_input[X].dev_attr.attr,   \
+        &temp_status[X].dev_attr.attr,  \
+        &temp_min[X].dev_attr.attr,     \
+        &temp_max[X].dev_attr.attr,     \
+        &temp_crit[X].dev_attr.attr
+
+static struct attribute * pc8736x_temp_attr_array[] = {
+        TEMP_UNIT_ATTRS(0),
+        TEMP_UNIT_ATTRS(1),
+        TEMP_UNIT_ATTRS(2),
+        /* include the few miscellaneous atts here */
+        &dev_attr_alarms_temp.attr,
+        NULL
+};
+static const struct attribute_group pc8736x_temp_group = {
+        .attrs = pc8736x_temp_attr_array,
+};
+
 /*
  * Device detection, registration and update
  */
@@ -936,60 +1018,69 @@ static int pc87360_detect(struct i2c_adapter *adapter)
                 pc87360_init_client(client, use_thermistors);
         }
 
-        /* Register sysfs hooks */
-        data->class_dev = hwmon_device_register(&client->dev);
-        if (IS_ERR(data->class_dev)) {
-                err = PTR_ERR(data->class_dev);
+        /* Register all-or-nothing sysfs groups */
+
+        if (data->innr &&
+            (err = sysfs_create_group(&client->dev.kobj,
+                                      &pc8736x_vin_group)))
                 goto ERROR3;
-        }
 
-        if (data->innr) {
-                for (i = 0; i < 11; i++) {
-                        device_create_file(dev, &in_input[i].dev_attr);
-                        device_create_file(dev, &in_min[i].dev_attr);
-                        device_create_file(dev, &in_max[i].dev_attr);
-                        device_create_file(dev, &in_status[i].dev_attr);
-                }
-                device_create_file(dev, &dev_attr_cpu0_vid);
-                device_create_file(dev, &dev_attr_vrm);
-                device_create_file(dev, &dev_attr_alarms_in);
-        }
+        if (data->innr == 14 &&
+            (err = sysfs_create_group(&client->dev.kobj,
+                                      &pc8736x_therm_group)))
+                goto ERROR3;
+
+        /* create device attr-files for varying sysfs groups */
 
         if (data->tempnr) {
                 for (i = 0; i < data->tempnr; i++) {
-                        device_create_file(dev, &temp_input[i].dev_attr);
-                        device_create_file(dev, &temp_min[i].dev_attr);
-                        device_create_file(dev, &temp_max[i].dev_attr);
-                        device_create_file(dev, &temp_crit[i].dev_attr);
-                        device_create_file(dev, &temp_status[i].dev_attr);
-                }
-                device_create_file(dev, &dev_attr_alarms_temp);
-        }
-
-        if (data->innr == 14) {
-                for (i = 0; i < 3; i++) {
-                        device_create_file(dev, &therm_input[i].dev_attr);
-                        device_create_file(dev, &therm_min[i].dev_attr);
-                        device_create_file(dev, &therm_max[i].dev_attr);
-                        device_create_file(dev, &therm_crit[i].dev_attr);
-                        device_create_file(dev, &therm_status[i].dev_attr);
+                        if ((err = device_create_file(dev,
+                                        &temp_input[i].dev_attr))
+                            || (err = device_create_file(dev,
+                                        &temp_min[i].dev_attr))
+                            || (err = device_create_file(dev,
+                                        &temp_max[i].dev_attr))
+                            || (err = device_create_file(dev,
+                                        &temp_crit[i].dev_attr))
+                            || (err = device_create_file(dev,
+                                        &temp_status[i].dev_attr)))
+                                goto ERROR3;
                 }
+                if ((err = device_create_file(dev, &dev_attr_alarms_temp)))
+                        goto ERROR3;
         }
 
         for (i = 0; i < data->fannr; i++) {
-                if (FAN_CONFIG_MONITOR(data->fan_conf, i)) {
-                        device_create_file(dev, &fan_input[i].dev_attr);
-                        device_create_file(dev, &fan_min[i].dev_attr);
-                        device_create_file(dev, &fan_div[i].dev_attr);
-                        device_create_file(dev, &fan_status[i].dev_attr);
-                }
-                if (FAN_CONFIG_CONTROL(data->fan_conf, i))
-                        device_create_file(dev, &pwm[i].dev_attr);
+                if (FAN_CONFIG_MONITOR(data->fan_conf, i)
+                    && ((err = device_create_file(dev,
+                                        &fan_input[i].dev_attr))
+                        || (err = device_create_file(dev,
+                                        &fan_min[i].dev_attr))
+                        || (err = device_create_file(dev,
+                                        &fan_div[i].dev_attr))
+                        || (err = device_create_file(dev,
+                                        &fan_status[i].dev_attr))))
+                        goto ERROR3;
+
+                if (FAN_CONFIG_CONTROL(data->fan_conf, i)
+                    && (err = device_create_file(dev, &pwm[i].dev_attr)))
+                        goto ERROR3;
         }
 
+        data->class_dev = hwmon_device_register(&client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto ERROR3;
+        }
         return 0;
 
 ERROR3:
+        /* can still remove groups whose members were added individually */
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_temp_group);
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_fan_group);
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_therm_group);
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_vin_group);
+
         i2c_detach_client(client);
 ERROR2:
         for (i = 0; i < 3; i++) {
@@ -1009,6 +1100,11 @@ static int pc87360_detach_client(struct i2c_client *client)
 
         hwmon_device_unregister(data->class_dev);
 
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_temp_group);
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_fan_group);
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_therm_group);
+        sysfs_remove_group(&client->dev.kobj, &pc8736x_vin_group);
+
         if ((i = i2c_detach_client(client)))
                 return i;