#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
-#include <linux/i2c-sensor.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
-
-static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
- 0x29, 0x2a, 0x2b,
- 0x4c, 0x4d, 0x4e,
- I2C_CLIENT_END };
-static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
+static const unsigned short normal_i2c[] = {
+ 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
/*
* Insmod parameters
*/
-SENSORS_INSMOD_1(max1619);
+I2C_CLIENT_INSMOD_1(max1619);
/*
* The MAX1619 registers
#define MAX1619_REG_W_TCRIT_HYST 0x13
/*
- * Conversions and various macros
+ * Conversions
*/
-#define TEMP_FROM_REG(val) ((val & 0x80 ? val-0x100 : val) * 1000)
-#define TEMP_TO_REG(val) ((val < 0 ? val+0x100*1000 : val) / 1000)
+static int temp_from_reg(int val)
+{
+ return (val & 0x80 ? val-0x100 : val) * 1000;
+}
+
+static int temp_to_reg(int val)
+{
+ return (val < 0 ? val+0x100*1000 : val) / 1000;
+}
/*
* Functions declaration
*/
-static int max1619_attach_adapter(struct i2c_adapter *adapter);
-static int max1619_detect(struct i2c_adapter *adapter, int address,
- int kind);
+static int max1619_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int max1619_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
static void max1619_init_client(struct i2c_client *client);
-static int max1619_detach_client(struct i2c_client *client);
+static int max1619_remove(struct i2c_client *client);
static struct max1619_data *max1619_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id max1619_id[] = {
+ { "max1619", max1619 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max1619_id);
+
static struct i2c_driver max1619_driver = {
- .owner = THIS_MODULE,
- .name = "max1619",
- .flags = I2C_DF_NOTIFY,
- .attach_adapter = max1619_attach_adapter,
- .detach_client = max1619_detach_client,
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "max1619",
+ },
+ .probe = max1619_probe,
+ .remove = max1619_remove,
+ .id_table = max1619_id,
+ .detect = max1619_detect,
+ .address_data = &addr_data,
};
/*
*/
struct max1619_data {
- struct i2c_client client;
- struct semaphore update_lock;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct max1619_data *data = max1619_update_device(dev); \
- return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
+ return sprintf(buf, "%d\n", temp_from_reg(data->value)); \
}
show_temp(temp_input1);
show_temp(temp_input2);
struct max1619_data *data = i2c_get_clientdata(client); \
long val = simple_strtol(buf, NULL, 10); \
\
- down(&data->update_lock); \
- data->value = TEMP_TO_REG(val); \
+ mutex_lock(&data->update_lock); \
+ data->value = temp_to_reg(val); \
i2c_smbus_write_byte_data(client, reg, data->value); \
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
return sprintf(buf, "%d\n", data->alarms);
}
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct max1619_data *data = max1619_update_device(dev);
+ return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
+}
+
static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL);
static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_low2,
static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp_hyst2,
set_temp_hyst2);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
+
+static struct attribute *max1619_attributes[] = {
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp2_input.attr,
+ &dev_attr_temp2_min.attr,
+ &dev_attr_temp2_max.attr,
+ &dev_attr_temp2_crit.attr,
+ &dev_attr_temp2_crit_hyst.attr,
+
+ &dev_attr_alarms.attr,
+ &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+ &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group max1619_group = {
+ .attrs = max1619_attributes,
+};
/*
* Real code
*/
-static int max1619_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_detect(adapter, &addr_data, max1619_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int max1619_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max1619_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info)
{
- struct i2c_client *new_client;
- struct max1619_data *data;
- int err = 0;
- const char *name = "";
+ struct i2c_adapter *adapter = new_client->adapter;
u8 reg_config=0, reg_convrate=0, reg_status=0;
- u8 man_id, chip_id;
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kmalloc(sizeof(struct max1619_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
- memset(data, 0, sizeof(struct max1619_data));
- /* The common I2C client data is placed right before the
- MAX1619-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &max1619_driver;
- new_client->flags = 0;
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
/*
* Now we do the remaining detection. A negative kind means that
|| reg_convrate > 0x07 || (reg_status & 0x61 ) !=0x00) {
dev_dbg(&adapter->dev,
"MAX1619 detection failed at 0x%02x.\n",
- address);
- goto exit_free;
+ new_client->addr);
+ return -ENODEV;
}
}
if (kind <= 0) { /* identification */
+ u8 man_id, chip_id;
man_id = i2c_smbus_read_byte_data(new_client,
MAX1619_REG_R_MAN_ID);
chip_id = i2c_smbus_read_byte_data(new_client,
MAX1619_REG_R_CHIP_ID);
- if ((man_id == 0x4D) && (chip_id == 0x04)){
- kind = max1619;
- }
- }
+ if ((man_id == 0x4D) && (chip_id == 0x04))
+ kind = max1619;
if (kind <= 0) { /* identification failed */
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X).\n", man_id, chip_id);
- goto exit_free;
+ return -ENODEV;
}
-
+ }
+
+ strlcpy(info->type, "max1619", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int max1619_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct max1619_data *data;
+ int err;
- if (kind == max1619){
- name = "max1619";
+ data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
}
- /* We can fill in the remaining client fields */
- strlcpy(new_client->name, name, I2C_NAME_SIZE);
+ i2c_set_clientdata(new_client, data);
data->valid = 0;
- init_MUTEX(&data->update_lock);
-
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
+ mutex_init(&data->update_lock);
/* Initialize the MAX1619 chip */
max1619_init_client(new_client);
/* Register sysfs hooks */
- device_create_file(&new_client->dev, &dev_attr_temp1_input);
- device_create_file(&new_client->dev, &dev_attr_temp2_input);
- device_create_file(&new_client->dev, &dev_attr_temp2_min);
- device_create_file(&new_client->dev, &dev_attr_temp2_max);
- device_create_file(&new_client->dev, &dev_attr_temp2_crit);
- device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst);
- device_create_file(&new_client->dev, &dev_attr_alarms);
+ if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group)))
+ goto exit_free;
+
+ 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;
+ }
return 0;
+exit_remove_files:
+ sysfs_remove_group(&new_client->dev.kobj, &max1619_group);
exit_free:
kfree(data);
exit:
config & 0xBF); /* run */
}
-static int max1619_detach_client(struct i2c_client *client)
+static int max1619_remove(struct i2c_client *client)
{
- int err;
+ struct max1619_data *data = i2c_get_clientdata(client);
- if ((err = i2c_detach_client(client))) {
- dev_err(&client->dev, "Client deregistration failed, "
- "client not detached.\n");
- return err;
- }
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &max1619_group);
- kfree(i2c_get_clientdata(client));
+ kfree(data);
return 0;
}
struct i2c_client *client = to_i2c_client(dev);
struct max1619_data *data = i2c_get_clientdata(client);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
dev_dbg(&client->dev, "Updating max1619 data.\n");
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff