[ARM] 4601/1: KS8695: PCI support

[linux-2.6-omap-h63xx.git] / drivers / hwmon / lm90.c

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 48833fff492004e740b228ad89d585da6b95943e..960df9fa75afe16cc4d0ecad7bf6130f4cb665e4 100644 (file)
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -41,7 +41,8 @@
  *   http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
  * Note that there is no easy way to differentiate between the three
  * variants. The extra address and features of the MAX6659 are not
- * supported by this driver.
+ * supported by this driver. These chips lack the remote temperature
+ * offset feature.
  *
  * This driver also supports the MAX6680 and MAX6681, two other sensor
  * chips made by Maxim. These are quite similar to the other Maxim
@@ -214,7 +215,7 @@ static struct i2c_driver lm90_driver = {
 
 struct lm90_data {
        struct i2c_client client;
-       struct class_device *class_dev;
+       struct device *hwmon_dev;
        struct mutex update_lock;
        char valid; /* zero until following fields are valid */
        unsigned long last_updated; /* in jiffies */
@@ -226,9 +227,10 @@ struct lm90_data {
                           2: local high limit
                           3: local critical limit
                           4: remote critical limit */
-       s16 temp11[3];  /* 0: remote input
+       s16 temp11[4];  /* 0: remote input
                           1: remote low limit
-                          2: remote high limit */
+                          2: remote high limit
+                          3: remote offset (except max6657) */
        u8 temp_hyst;
        u8 alarms; /* bitvector */
 };
@@ -282,11 +284,13 @@ static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
                          const char *buf, size_t count)
 {
-       static const u8 reg[4] = {
+       static const u8 reg[6] = {
                LM90_REG_W_REMOTE_LOWH,
                LM90_REG_W_REMOTE_LOWL,
                LM90_REG_W_REMOTE_HIGHH,
                LM90_REG_W_REMOTE_HIGHL,
+               LM90_REG_W_REMOTE_OFFSH,
+               LM90_REG_W_REMOTE_OFFSL,
        };
 
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
@@ -367,6 +371,8 @@ static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
        set_temphyst, 3);
 static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
+       set_temp11, 3);
 
 /* Individual alarm files */
 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
@@ -585,7 +591,7 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
                         * those of the man_id register.
                         */
                        if (chip_id == man_id
-                        && (address == 0x4F || address == 0x4D)
+                        && (address == 0x4C || address == 0x4D)
                         && (reg_config1 & 0x1F) == (man_id & 0x0F)
                         && reg_convrate <= 0x09) {
                                kind = max6657;
@@ -652,10 +658,15 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
                                              &dev_attr_pec)))
                        goto exit_remove_files;
        }
+       if (data->kind != max6657) {
+               if ((err = device_create_file(&new_client->dev,
+                               &sensor_dev_attr_temp2_offset.dev_attr)))
+                       goto exit_remove_files;
+       }
 
-       data->class_dev = hwmon_device_register(&new_client->dev);
-       if (IS_ERR(data->class_dev)) {
-               err = PTR_ERR(data->class_dev);
+       data->hwmon_dev = hwmon_device_register(&new_client->dev);
+       if (IS_ERR(data->hwmon_dev)) {
+               err = PTR_ERR(data->hwmon_dev);
                goto exit_remove_files;
        }
 
@@ -707,9 +718,12 @@ static int lm90_detach_client(struct i2c_client *client)
        struct lm90_data *data = i2c_get_clientdata(client);
        int err;
 
-       hwmon_device_unregister(data->class_dev);
+       hwmon_device_unregister(data->hwmon_dev);
        sysfs_remove_group(&client->dev.kobj, &lm90_group);
        device_remove_file(&client->dev, &dev_attr_pec);
+       if (data->kind != max6657)
+               device_remove_file(&client->dev,
+                                  &sensor_dev_attr_temp2_offset.dev_attr);
 
        if ((err = i2c_detach_client(client)))
                return err;
@@ -763,6 +777,13 @@ static struct lm90_data *lm90_update_device(struct device *dev)
                if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &newh) == 0
                 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, &l) == 0)
                        data->temp11[2] = (newh << 8) | l;
+               if (data->kind != max6657) {
+                       if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
+                                         &newh) == 0
+                        && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
+                                         &l) == 0)
+                               data->temp11[3] = (newh << 8) | l;
+               }
                lm90_read_reg(client, LM90_REG_R_STATUS, &data->alarms);
 
                data->last_updated = jiffies;