hwmon: (w83793) Convert to a new-style i2c driver
The new-style w83793 driver implements the optional detect()
callback to cover the use cases of the legacy driver.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index ed3c019..0a739f1 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -179,7 +179,6 @@
}
struct w83793_data {
- struct i2c_client client;
struct i2c_client *lm75[2];
struct device *hwmon_dev;
struct mutex update_lock;
@@ -226,19 +225,31 @@
static u8 w83793_read_value(struct i2c_client *client, u16 reg);
static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
-static int w83793_attach_adapter(struct i2c_adapter *adapter);
-static int w83793_detect(struct i2c_adapter *adapter, int address, int kind);
-static int w83793_detach_client(struct i2c_client *client);
+static int w83793_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int w83793_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int w83793_remove(struct i2c_client *client);
static void w83793_init_client(struct i2c_client *client);
static void w83793_update_nonvolatile(struct device *dev);
static struct w83793_data *w83793_update_device(struct device *dev);
+static const struct i2c_device_id w83793_id[] = {
+ { "w83793", w83793 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, w83793_id);
+
static struct i2c_driver w83793_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "w83793",
},
- .attach_adapter = w83793_attach_adapter,
- .detach_client = w83793_detach_client,
+ .probe = w83793_probe,
+ .remove = w83793_remove,
+ .id_table = w83793_id,
+ .detect = w83793_detect,
+ .address_data = &addr_data,
};
static ssize_t
@@ -1053,89 +1064,51 @@
}
-static int w83793_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, w83793_detect);
-}
-
-static int w83793_detach_client(struct i2c_client *client)
+static int w83793_remove(struct i2c_client *client)
{
struct w83793_data *data = i2c_get_clientdata(client);
struct device *dev = &client->dev;
- int err, i;
+ int i;
- /* main client */
- if (data) {
- hwmon_device_unregister(data->hwmon_dev);
+ hwmon_device_unregister(data->hwmon_dev);
- for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
- device_remove_file(dev,
- &w83793_sensor_attr_2[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
+ device_remove_file(dev,
+ &w83793_sensor_attr_2[i].dev_attr);
- for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
- device_remove_file(dev, &sda_single_files[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
+ device_remove_file(dev, &sda_single_files[i].dev_attr);
- for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
- device_remove_file(dev, &w83793_vid[i].dev_attr);
- device_remove_file(dev, &dev_attr_vrm);
+ for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
+ device_remove_file(dev, &w83793_vid[i].dev_attr);
+ device_remove_file(dev, &dev_attr_vrm);
- for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
- device_remove_file(dev, &w83793_left_fan[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
+ device_remove_file(dev, &w83793_left_fan[i].dev_attr);
- for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
- device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
+ device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
- for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
- device_remove_file(dev, &w83793_temp[i].dev_attr);
- }
+ for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
+ device_remove_file(dev, &w83793_temp[i].dev_attr);
- if ((err = i2c_detach_client(client)))
- return err;
+ if (data->lm75[0] != NULL)
+ i2c_unregister_device(data->lm75[0]);
+ if (data->lm75[1] != NULL)
+ i2c_unregister_device(data->lm75[1]);
- /* main client */
- if (data)
- kfree(data);
- /* subclient */
- else
- kfree(client);
+ kfree(data);
return 0;
}
static int
-w83793_create_subclient(struct i2c_adapter *adapter,
- struct i2c_client *client, int addr,
- struct i2c_client **sub_cli)
-{
- int err = 0;
- struct i2c_client *sub_client;
-
- (*sub_cli) = sub_client =
- kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (!(sub_client)) {
- return -ENOMEM;
- }
- sub_client->addr = 0x48 + addr;
- i2c_set_clientdata(sub_client, NULL);
- sub_client->adapter = adapter;
- sub_client->driver = &w83793_driver;
- strlcpy(sub_client->name, "w83793 subclient", I2C_NAME_SIZE);
- if ((err = i2c_attach_client(sub_client))) {
- dev_err(&client->dev, "subclient registration "
- "at address 0x%x failed\n", sub_client->addr);
- kfree(sub_client);
- }
- return err;
-}
-
-static int
-w83793_detect_subclients(struct i2c_adapter *adapter, int address,
- int kind, struct i2c_client *client)
+w83793_detect_subclients(struct i2c_client *client)
{
int i, id, err;
+ int address = client->addr;
u8 tmp;
+ struct i2c_adapter *adapter = client->adapter;
struct w83793_data *data = i2c_get_clientdata(client);
id = i2c_adapter_id(adapter);
@@ -1158,11 +1131,7 @@
tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
if (!(tmp & 0x08)) {
- err =
- w83793_create_subclient(adapter, client, tmp & 0x7,
- &data->lm75[0]);
- if (err < 0)
- goto ERROR_SC_0;
+ data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
}
if (!(tmp & 0x80)) {
if ((data->lm75[0] != NULL)
@@ -1173,10 +1142,8 @@
err = -ENODEV;
goto ERROR_SC_1;
}
- err = w83793_create_subclient(adapter, client,
- (tmp >> 4) & 0x7, &data->lm75[1]);
- if (err < 0)
- goto ERROR_SC_1;
+ data->lm75[1] = i2c_new_dummy(adapter,
+ 0x48 + ((tmp >> 4) & 0x7));
}
return 0;
@@ -1184,69 +1151,44 @@
/* Undo inits in case of errors */
ERROR_SC_1:
- if (data->lm75[0] != NULL) {
- i2c_detach_client(data->lm75[0]);
- kfree(data->lm75[0]);
- }
+ if (data->lm75[0] != NULL)
+ i2c_unregister_device(data->lm75[0]);
ERROR_SC_0:
return err;
}
-static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int w83793_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- int i;
- u8 tmp, val;
- struct i2c_client *client;
- struct device *dev;
- struct w83793_data *data;
- int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
- int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
- int files_temp = ARRAY_SIZE(w83793_temp) / 6;
- int err = 0;
+ u8 tmp, bank;
+ struct i2c_adapter *adapter = client->adapter;
+ unsigned short address = client->addr;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- goto exit;
+ return -ENODEV;
}
- /* OK. For now, we presume we have a valid client. We now create the
- client structure, even though we cannot fill it completely yet.
- But it allows us to access w83793_{read,write}_value. */
+ bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
- if (!(data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- dev = &client->dev;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &w83793_driver;
-
- data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
-
- /* Now, we do the remaining detection. */
if (kind < 0) {
- tmp = data->bank & 0x80 ? 0x5c : 0xa3;
+ tmp = bank & 0x80 ? 0x5c : 0xa3;
/* Check Winbond vendor ID */
if (tmp != i2c_smbus_read_byte_data(client,
W83793_REG_VENDORID)) {
pr_debug("w83793: Detection failed at check "
"vendor id\n");
- err = -ENODEV;
- goto free_mem;
+ return -ENODEV;
}
/* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
should match */
- if ((data->bank & 0x07) == 0
+ if ((bank & 0x07) == 0
&& i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
(address << 1)) {
pr_debug("w83793: Detection failed at check "
"i2c addr\n");
- err = -ENODEV;
- goto free_mem;
+ return -ENODEV;
}
}
@@ -1255,30 +1197,47 @@
Winbond. Determine the chip type now */
if (kind <= 0) {
- if (0x7b == w83793_read_value(client, W83793_REG_CHIPID)) {
+ if (0x7b == i2c_smbus_read_byte_data(client,
+ W83793_REG_CHIPID)) {
kind = w83793;
} else {
if (kind == 0)
dev_warn(&adapter->dev, "w83793: Ignoring "
"'force' parameter for unknown chip "
"at address 0x%02x\n", address);
- err = -ENODEV;
- goto free_mem;
+ return -ENODEV;
}
}
- /* Fill in the remaining client fields and put into the global list */
- strlcpy(client->name, "w83793", I2C_NAME_SIZE);
+ strlcpy(info->type, "w83793", I2C_NAME_SIZE);
+ return 0;
+}
+
+static int w83793_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct w83793_data *data;
+ int i, tmp, val, err;
+ int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
+ int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
+ int files_temp = ARRAY_SIZE(w83793_temp) / 6;
+
+ data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
+ err = w83793_detect_subclients(client);
+ if (err)
goto free_mem;
- if ((err = w83793_detect_subclients(adapter, address, kind, client)))
- goto detach_client;
-
/* Initialize the chip */
w83793_init_client(client);
@@ -1459,16 +1418,10 @@
for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
device_remove_file(dev, &w83793_temp[i].dev_attr);
- if (data->lm75[0] != NULL) {
- i2c_detach_client(data->lm75[0]);
- kfree(data->lm75[0]);
- }
- if (data->lm75[1] != NULL) {
- i2c_detach_client(data->lm75[1]);
- kfree(data->lm75[1]);
- }
-detach_client:
- i2c_detach_client(client);
+ if (data->lm75[0] != NULL)
+ i2c_unregister_device(data->lm75[0]);
+ if (data->lm75[1] != NULL)
+ i2c_unregister_device(data->lm75[1]);
free_mem:
kfree(data);
exit: