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authorJean Delvare <khali@linux-fr.org>2011-05-25 20:43:32 +0200
committerJean Delvare <khali@endymion.delvare>2011-05-25 20:43:32 +0200
commit9c084dae5dc7ae0039e330230e70f2a5956e566a (patch)
tree1d0bb268081342ca1dee7a6c819cd459f409939d
parent67b670ff04cdff1c9584ecdb22e297956664c9b5 (diff)
hwmon: (max6650) Properly support the MAX6650
The MAX6650 has only one fan input. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: "Hans J. Koch" <hjk@hansjkoch.de> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
-rw-r--r--Documentation/hwmon/max665012
-rw-r--r--drivers/hwmon/max6650.c34
2 files changed, 36 insertions, 10 deletions
diff --git a/Documentation/hwmon/max6650 b/Documentation/hwmon/max6650
index b26fef5f950e..58d9644a2bde 100644
--- a/Documentation/hwmon/max6650
+++ b/Documentation/hwmon/max6650
@@ -2,10 +2,14 @@ Kernel driver max6650
=====================
Supported chips:
- * Maxim 6650 / 6651
+ * Maxim MAX6650
Prefix: 'max6650'
Addresses scanned: none
Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
+ * Maxim MAX6651
+ Prefix: 'max6651'
+ Addresses scanned: none
+ Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
Authors:
Hans J. Koch <hjk@hansjkoch.de>
@@ -15,10 +19,10 @@ Authors:
Description
-----------
-This driver implements support for the Maxim 6650/6651
+This driver implements support for the Maxim MAX6650 and MAX6651.
-The 2 devices are very similar, but the Maxim 6550 has a reduced feature
-set, e.g. only one fan-input, instead of 4 for the 6651.
+The 2 devices are very similar, but the MAX6550 has a reduced feature
+set, e.g. only one fan-input, instead of 4 for the MAX6651.
The driver is not able to distinguish between the 2 devices.
diff --git a/drivers/hwmon/max6650.c b/drivers/hwmon/max6650.c
index cced18626174..ece3aafa54b3 100644
--- a/drivers/hwmon/max6650.c
+++ b/drivers/hwmon/max6650.c
@@ -116,7 +116,8 @@ static struct max6650_data *max6650_update_device(struct device *dev);
*/
static const struct i2c_device_id max6650_id[] = {
- { "max6650", 0 },
+ { "max6650", 1 },
+ { "max6651", 4 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max6650_id);
@@ -138,6 +139,7 @@ struct max6650_data
{
struct device *hwmon_dev;
struct mutex update_lock;
+ int nr_fans;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
@@ -489,9 +491,6 @@ static mode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
static struct attribute *max6650_attrs[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
- &sensor_dev_attr_fan2_input.dev_attr.attr,
- &sensor_dev_attr_fan3_input.dev_attr.attr,
- &sensor_dev_attr_fan4_input.dev_attr.attr,
&dev_attr_fan1_target.attr,
&dev_attr_fan1_div.attr,
&dev_attr_pwm1_enable.attr,
@@ -509,6 +508,17 @@ static struct attribute_group max6650_attr_grp = {
.is_visible = max6650_attrs_visible,
};
+static struct attribute *max6651_attrs[] = {
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan4_input.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group max6651_attr_grp = {
+ .attrs = max6651_attrs,
+};
+
/*
* Real code
*/
@@ -526,6 +536,7 @@ static int max6650_probe(struct i2c_client *client,
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
+ data->nr_fans = id->driver_data;
/*
* Initialize the max6650 chip
@@ -537,6 +548,12 @@ static int max6650_probe(struct i2c_client *client,
err = sysfs_create_group(&client->dev.kobj, &max6650_attr_grp);
if (err)
goto err_free;
+ /* 3 additional fan inputs for the MAX6651 */
+ if (data->nr_fans == 4) {
+ err = sysfs_create_group(&client->dev.kobj, &max6651_attr_grp);
+ if (err)
+ goto err_remove;
+ }
data->hwmon_dev = hwmon_device_register(&client->dev);
if (!IS_ERR(data->hwmon_dev))
@@ -544,6 +561,9 @@ static int max6650_probe(struct i2c_client *client,
err = PTR_ERR(data->hwmon_dev);
dev_err(&client->dev, "error registering hwmon device.\n");
+ if (data->nr_fans == 4)
+ sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
+err_remove:
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
err_free:
kfree(data);
@@ -554,8 +574,10 @@ static int max6650_remove(struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
- sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
hwmon_device_unregister(data->hwmon_dev);
+ if (data->nr_fans == 4)
+ sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
+ sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
kfree(data);
return 0;
}
@@ -668,7 +690,7 @@ static struct max6650_data *max6650_update_device(struct device *dev)
MAX6650_REG_SPEED);
data->config = i2c_smbus_read_byte_data(client,
MAX6650_REG_CONFIG);
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < data->nr_fans; i++) {
data->tach[i] = i2c_smbus_read_byte_data(client,
tach_reg[i]);
}