mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 11:46:19 +00:00
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>
This commit is contained in:
Jean Delvare
Jean Delvare
parent
eea54766c6
commit
063675b156
1 changed files with 83 additions and 124 deletions
|
|
@ -176,10 +176,8 @@ static u8 DIV_TO_REG(long val)
|
|||
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 @@ struct asb100_data {
|
|||
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 @@ static const struct attribute_group asb100_group = {
|
|||
.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 @@ static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
|
|||
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 @@ static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
|
|||
|
||||
/* 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 @@ static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
|
|||
((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 @@ static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
|
|||
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;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue