* also work with the MAX6651. It does not distinguish max6650 and max6651
* chips.
*
- * Tha datasheet was last seen at:
+ * The datasheet was last seen at:
*
* http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
*
* Addresses to scan. There are four disjoint possibilities, by pin config.
*/
-static unsigned short normal_i2c[] = {0x1b, 0x1f, 0x48, 0x4b, I2C_CLIENT_END};
+static const unsigned short normal_i2c[] = {0x1b, 0x1f, 0x48, 0x4b,
+ I2C_CLIENT_END};
/*
* Insmod parameters
#define MAX6650_CFG_MODE_OPEN_LOOP 0x30
#define MAX6650_COUNT_MASK 0x03
+/*
+ * Alarm status register bits
+ */
+
+#define MAX6650_ALRM_MAX 0x01
+#define MAX6650_ALRM_MIN 0x02
+#define MAX6650_ALRM_TACH 0x04
+#define MAX6650_ALRM_GPIO1 0x08
+#define MAX6650_ALRM_GPIO2 0x10
+
/* Minimum and maximum values of the FAN-RPM */
#define FAN_RPM_MIN 240
#define FAN_RPM_MAX 30000
#define DIV_FROM_REG(reg) (1 << (reg & 7))
-static int max6650_attach_adapter(struct i2c_adapter *adapter);
-static int max6650_detect(struct i2c_adapter *adapter, int address, int kind);
+static int max6650_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int max6650_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static int max6650_init_client(struct i2c_client *client);
-static int max6650_detach_client(struct i2c_client *client);
+static int max6650_remove(struct i2c_client *client);
static struct max6650_data *max6650_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id max6650_id[] = {
+ { "max6650", max6650 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max6650_id);
+
static struct i2c_driver max6650_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "max6650",
},
- .attach_adapter = max6650_attach_adapter,
- .detach_client = max6650_detach_client,
+ .probe = max6650_probe,
+ .remove = max6650_remove,
+ .id_table = max6650_id,
+ .detect = max6650_detect,
+ .address_data = &addr_data,
};
/*
struct max6650_data
{
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
u8 tach[4];
u8 count;
u8 dac;
+ u8 alarm;
};
static ssize_t get_fan(struct device *dev, struct device_attribute *devattr,
data->count = 3;
break;
default:
+ mutex_unlock(&data->update_lock);
dev_err(&client->dev,
"illegal value for fan divider (%d)\n", div);
return -EINVAL;
return count;
}
+/*
+ * Get alarm stati:
+ * Possible values:
+ * 0 = no alarm
+ * 1 = alarm
+ */
+
+static ssize_t get_alarm(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct max6650_data *data = max6650_update_device(dev);
+ struct i2c_client *client = to_i2c_client(dev);
+ int alarm = 0;
+
+ if (data->alarm & attr->index) {
+ mutex_lock(&data->update_lock);
+ alarm = 1;
+ data->alarm &= ~attr->index;
+ data->alarm |= i2c_smbus_read_byte_data(client,
+ MAX6650_REG_ALARM);
+ mutex_unlock(&data->update_lock);
+ }
+
+ return sprintf(buf, "%d\n", alarm);
+}
+
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, get_fan, NULL, 2);
static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, get_div, set_div);
static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, get_enable, set_enable);
static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm, set_pwm);
+static SENSOR_DEVICE_ATTR(fan1_max_alarm, S_IRUGO, get_alarm, NULL,
+ MAX6650_ALRM_MAX);
+static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, get_alarm, NULL,
+ MAX6650_ALRM_MIN);
+static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_alarm, NULL,
+ MAX6650_ALRM_TACH);
+static SENSOR_DEVICE_ATTR(gpio1_alarm, S_IRUGO, get_alarm, NULL,
+ MAX6650_ALRM_GPIO1);
+static SENSOR_DEVICE_ATTR(gpio2_alarm, S_IRUGO, get_alarm, NULL,
+ MAX6650_ALRM_GPIO2);
+
+static mode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
+ int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct i2c_client *client = to_i2c_client(dev);
+ u8 alarm_en = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN);
+ struct device_attribute *devattr;
+ /*
+ * Hide the alarms that have not been enabled by the firmware
+ */
+
+ devattr = container_of(a, struct device_attribute, attr);
+ if (devattr == &sensor_dev_attr_fan1_max_alarm.dev_attr
+ || devattr == &sensor_dev_attr_fan1_min_alarm.dev_attr
+ || devattr == &sensor_dev_attr_fan1_fault.dev_attr
+ || devattr == &sensor_dev_attr_gpio1_alarm.dev_attr
+ || devattr == &sensor_dev_attr_gpio2_alarm.dev_attr) {
+ if (!(alarm_en & to_sensor_dev_attr(devattr)->index))
+ return 0;
+ }
+
+ return a->mode;
+}
static struct attribute *max6650_attrs[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
&dev_attr_fan1_div.attr,
&dev_attr_pwm1_enable.attr,
&dev_attr_pwm1.attr,
+ &sensor_dev_attr_fan1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_fault.dev_attr.attr,
+ &sensor_dev_attr_gpio1_alarm.dev_attr.attr,
+ &sensor_dev_attr_gpio2_alarm.dev_attr.attr,
NULL
};
static struct attribute_group max6650_attr_grp = {
.attrs = max6650_attrs,
+ .is_visible = max6650_attrs_visible,
};
/*
* Real code
*/
-static int max6650_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON)) {
- dev_dbg(&adapter->dev,
- "FATAL: max6650_attach_adapter class HWMON not set\n");
- return 0;
- }
-
- return i2c_probe(adapter, &addr_data, max6650_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-
-static int max6650_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max6650_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- struct i2c_client *client;
- struct max6650_data *data;
- int err = -ENODEV;
+ struct i2c_adapter *adapter = client->adapter;
+ int address = client->addr;
dev_dbg(&adapter->dev, "max6650_detect called, kind = %d\n", kind);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_dbg(&adapter->dev, "max6650: I2C bus doesn't support "
"byte read mode, skipping.\n");
- return 0;
- }
-
- if (!(data = kzalloc(sizeof(struct max6650_data), GFP_KERNEL))) {
- dev_err(&adapter->dev, "max6650: out of memory.\n");
- return -ENOMEM;
+ return -ENODEV;
}
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &max6650_driver;
-
/*
* Now we do the remaining detection. A negative kind means that
* the driver was loaded with no force parameter (default), so we
||(i2c_smbus_read_byte_data(client, MAX6650_REG_COUNT) & 0xFC))) {
dev_dbg(&adapter->dev,
"max6650: detection failed at 0x%02x.\n", address);
- goto err_free;
+ return -ENODEV;
}
dev_info(&adapter->dev, "max6650: chip found at 0x%02x.\n", address);
- strlcpy(client->name, "max6650", I2C_NAME_SIZE);
- mutex_init(&data->update_lock);
+ strlcpy(info->type, "max6650", I2C_NAME_SIZE);
- if ((err = i2c_attach_client(client))) {
- dev_err(&adapter->dev, "max6650: failed to attach client.\n");
- goto err_free;
+ return 0;
+}
+
+static int max6650_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max6650_data *data;
+ int err;
+
+ if (!(data = kzalloc(sizeof(struct max6650_data), GFP_KERNEL))) {
+ dev_err(&client->dev, "out of memory.\n");
+ return -ENOMEM;
}
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
/*
* Initialize the max6650 chip
*/
- if (max6650_init_client(client))
- goto err_detach;
+ err = max6650_init_client(client);
+ if (err)
+ goto err_free;
err = sysfs_create_group(&client->dev.kobj, &max6650_attr_grp);
if (err)
- goto err_detach;
+ goto err_free;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (!IS_ERR(data->hwmon_dev))
err = PTR_ERR(data->hwmon_dev);
dev_err(&client->dev, "error registering hwmon device.\n");
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
-err_detach:
- i2c_detach_client(client);
err_free:
kfree(data);
return err;
}
-static int max6650_detach_client(struct i2c_client *client)
+static int max6650_remove(struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
- int err;
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
hwmon_device_unregister(data->hwmon_dev);
- err = i2c_detach_client(client);
- if (!err)
- kfree(data);
- return err;
+ kfree(data);
+ return 0;
}
static int max6650_init_client(struct i2c_client *client)
MAX6650_REG_COUNT);
data->dac = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
+ /* Alarms are cleared on read in case the condition that
+ * caused the alarm is removed. Keep the value latched here
+ * for providing the register through different alarm files. */
+ data->alarm |= i2c_smbus_read_byte_data(client,
+ MAX6650_REG_ALARM);
+
data->last_updated = jiffies;
data->valid = 1;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff