hwmon: (asb100) Convert to a new-style i2c driver
The new-style asb100 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/asb100.c b/drivers/hwmon/asb100.c
index fe2eea4..8a45a2e 100644
--- a/drivers/hwmon/asb100.c
+++ b/drivers/hwmon/asb100.c
@@ -176,10 +176,8 @@
data is pointed to by client->data. The structure itself is
dynamically allocated, at the same time the client itself is allocated. */
struct asb100_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex lock;
- enum chips type;
struct mutex update_lock;
unsigned long last_updated; /* In jiffies */
@@ -206,18 +204,30 @@
static int asb100_read_value(struct i2c_client *client, u16 reg);
static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
-static int asb100_attach_adapter(struct i2c_adapter *adapter);
-static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
-static int asb100_detach_client(struct i2c_client *client);
+static int asb100_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int asb100_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int asb100_remove(struct i2c_client *client);
static struct asb100_data *asb100_update_device(struct device *dev);
static void asb100_init_client(struct i2c_client *client);
+static const struct i2c_device_id asb100_id[] = {
+ { "asb100", asb100 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, asb100_id);
+
static struct i2c_driver asb100_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "asb100",
},
- .attach_adapter = asb100_attach_adapter,
- .detach_client = asb100_detach_client,
+ .probe = asb100_probe,
+ .remove = asb100_remove,
+ .id_table = asb100_id,
+ .detect = asb100_detect,
+ .address_data = &addr_data,
};
/* 7 Voltages */
@@ -619,35 +629,13 @@
.attrs = asb100_attributes,
};
-/* This function is called when:
- asb100_driver is inserted (when this module is loaded), for each
- available adapter
- when a new adapter is inserted (and asb100_driver is still present)
- */
-static int asb100_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, asb100_detect);
-}
-
-static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
- int kind, struct i2c_client *client)
+static int asb100_detect_subclients(struct i2c_client *client)
{
int i, id, err;
+ int address = client->addr;
+ unsigned short sc_addr[2];
struct asb100_data *data = i2c_get_clientdata(client);
-
- data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (!(data->lm75[0])) {
- err = -ENOMEM;
- goto ERROR_SC_0;
- }
-
- data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (!(data->lm75[1])) {
- err = -ENOMEM;
- goto ERROR_SC_1;
- }
+ struct i2c_adapter *adapter = client->adapter;
id = i2c_adapter_id(adapter);
@@ -665,37 +653,34 @@
asb100_write_value(client, ASB100_REG_I2C_SUBADDR,
(force_subclients[2] & 0x07) |
((force_subclients[3] & 0x07) << 4));
- data->lm75[0]->addr = force_subclients[2];
- data->lm75[1]->addr = force_subclients[3];
+ sc_addr[0] = force_subclients[2];
+ sc_addr[1] = force_subclients[3];
} else {
int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);
- data->lm75[0]->addr = 0x48 + (val & 0x07);
- data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
+ sc_addr[0] = 0x48 + (val & 0x07);
+ sc_addr[1] = 0x48 + ((val >> 4) & 0x07);
}
- if (data->lm75[0]->addr == data->lm75[1]->addr) {
+ if (sc_addr[0] == sc_addr[1]) {
dev_err(&client->dev, "duplicate addresses 0x%x "
- "for subclients\n", data->lm75[0]->addr);
+ "for subclients\n", sc_addr[0]);
err = -ENODEV;
goto ERROR_SC_2;
}
- for (i = 0; i <= 1; i++) {
- i2c_set_clientdata(data->lm75[i], NULL);
- data->lm75[i]->adapter = adapter;
- data->lm75[i]->driver = &asb100_driver;
- strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
- }
-
- if ((err = i2c_attach_client(data->lm75[0]))) {
+ data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]);
+ if (!data->lm75[0]) {
dev_err(&client->dev, "subclient %d registration "
- "at address 0x%x failed.\n", i, data->lm75[0]->addr);
+ "at address 0x%x failed.\n", 1, sc_addr[0]);
+ err = -ENOMEM;
goto ERROR_SC_2;
}
- if ((err = i2c_attach_client(data->lm75[1]))) {
+ data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]);
+ if (!data->lm75[1]) {
dev_err(&client->dev, "subclient %d registration "
- "at address 0x%x failed.\n", i, data->lm75[1]->addr);
+ "at address 0x%x failed.\n", 2, sc_addr[1]);
+ err = -ENOMEM;
goto ERROR_SC_3;
}
@@ -703,55 +688,31 @@
/* Undo inits in case of errors */
ERROR_SC_3:
- i2c_detach_client(data->lm75[0]);
+ i2c_unregister_device(data->lm75[0]);
ERROR_SC_2:
- kfree(data->lm75[1]);
-ERROR_SC_1:
- kfree(data->lm75[0]);
-ERROR_SC_0:
return err;
}
-static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int asb100_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- int err;
- struct i2c_client *client;
- struct asb100_data *data;
+ struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
pr_debug("asb100.o: detect failed, "
"smbus byte data not supported!\n");
- err = -ENODEV;
- goto ERROR0;
+ 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 asb100_{read,write}_value. */
-
- if (!(data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
- pr_debug("asb100.o: detect failed, kzalloc failed!\n");
- err = -ENOMEM;
- goto ERROR0;
- }
-
- client = &data->client;
- mutex_init(&data->lock);
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &asb100_driver;
-
- /* Now, we do the remaining detection. */
-
/* The chip may be stuck in some other bank than bank 0. This may
make reading other information impossible. Specify a force=... or
force_*=... parameter, and the chip will be reset to the right
bank. */
if (kind < 0) {
- int val1 = asb100_read_value(client, ASB100_REG_BANK);
- int val2 = asb100_read_value(client, ASB100_REG_CHIPMAN);
+ int val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK);
+ int val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
/* If we're in bank 0 */
if ((!(val1 & 0x07)) &&
@@ -761,48 +722,60 @@
((val1 & 0x80) && (val2 != 0x06)))) {
pr_debug("asb100.o: detect failed, "
"bad chip id 0x%02x!\n", val2);
- err = -ENODEV;
- goto ERROR1;
+ return -ENODEV;
}
} /* kind < 0 */
/* We have either had a force parameter, or we have already detected
Winbond. Put it now into bank 0 and Vendor ID High Byte */
- asb100_write_value(client, ASB100_REG_BANK,
- (asb100_read_value(client, ASB100_REG_BANK) & 0x78) | 0x80);
+ i2c_smbus_write_byte_data(client, ASB100_REG_BANK,
+ (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78)
+ | 0x80);
/* Determine the chip type. */
if (kind <= 0) {
- int val1 = asb100_read_value(client, ASB100_REG_WCHIPID);
- int val2 = asb100_read_value(client, ASB100_REG_CHIPMAN);
+ int val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID);
+ int val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
if ((val1 == 0x31) && (val2 == 0x06))
kind = asb100;
else {
if (kind == 0)
- dev_warn(&client->dev, "ignoring "
+ dev_warn(&adapter->dev, "ignoring "
"'force' parameter for unknown chip "
"at adapter %d, address 0x%02x.\n",
- i2c_adapter_id(adapter), address);
- err = -ENODEV;
- goto ERROR1;
+ i2c_adapter_id(adapter), client->addr);
+ return -ENODEV;
}
}
- /* Fill in remaining client fields and put it into the global list */
- strlcpy(client->name, "asb100", I2C_NAME_SIZE);
- data->type = kind;
+ strlcpy(info->type, "asb100", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int asb100_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int err;
+ struct asb100_data *data;
+
+ data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL);
+ if (!data) {
+ pr_debug("asb100.o: probe failed, kzalloc failed!\n");
+ err = -ENOMEM;
+ goto ERROR0;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->lock);
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto ERROR1;
-
/* Attach secondary lm75 clients */
- if ((err = asb100_detect_subclients(adapter, address, kind,
- client)))
- goto ERROR2;
+ err = asb100_detect_subclients(client);
+ if (err)
+ goto ERROR1;
/* Initialize the chip */
asb100_init_client(client);
@@ -827,39 +800,25 @@
ERROR4:
sysfs_remove_group(&client->dev.kobj, &asb100_group);
ERROR3:
- i2c_detach_client(data->lm75[1]);
- i2c_detach_client(data->lm75[0]);
- kfree(data->lm75[1]);
- kfree(data->lm75[0]);
-ERROR2:
- i2c_detach_client(client);
+ i2c_unregister_device(data->lm75[1]);
+ i2c_unregister_device(data->lm75[0]);
ERROR1:
kfree(data);
ERROR0:
return err;
}
-static int asb100_detach_client(struct i2c_client *client)
+static int asb100_remove(struct i2c_client *client)
{
struct asb100_data *data = i2c_get_clientdata(client);
- int err;
- /* main client */
- if (data) {
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &asb100_group);
- }
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &asb100_group);
- if ((err = i2c_detach_client(client)))
- return err;
+ i2c_unregister_device(data->lm75[1]);
+ i2c_unregister_device(data->lm75[0]);
- /* main client */
- if (data)
- kfree(data);
-
- /* subclient */
- else
- kfree(client);
+ kfree(data);
return 0;
}