From 9b0e85269275159a1f9c3e4a5d254caf5211950b Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 16 Jul 2008 19:30:15 +0200 Subject: [PATCH] hwmon: (lm90) Convert to a new-style i2c driver The new-style lm90 driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare --- drivers/hwmon/lm90.c | 119 +++++++++++++++++++++++-------------------- 1 file changed, 63 insertions(+), 56 deletions(-) diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index d1a3da3dd8e0..c24fe36ac787 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -187,23 +187,44 @@ I2C_CLIENT_INSMOD_7(lm90, adm1032, lm99, lm86, max6657, adt7461, max6680); * Functions declaration */ -static int lm90_attach_adapter(struct i2c_adapter *adapter); -static int lm90_detect(struct i2c_adapter *adapter, int address, - int kind); +static int lm90_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info); +static int lm90_probe(struct i2c_client *client, + const struct i2c_device_id *id); static void lm90_init_client(struct i2c_client *client); -static int lm90_detach_client(struct i2c_client *client); +static int lm90_remove(struct i2c_client *client); static struct lm90_data *lm90_update_device(struct device *dev); /* * Driver data (common to all clients) */ +static const struct i2c_device_id lm90_id[] = { + { "adm1032", adm1032 }, + { "adt7461", adt7461 }, + { "lm90", lm90 }, + { "lm86", lm86 }, + { "lm89", lm99 }, + { "lm99", lm99 }, /* Missing temperature offset */ + { "max6657", max6657 }, + { "max6658", max6657 }, + { "max6659", max6657 }, + { "max6680", max6680 }, + { "max6681", max6680 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm90_id); + static struct i2c_driver lm90_driver = { + .class = I2C_CLASS_HWMON, .driver = { .name = "lm90", }, - .attach_adapter = lm90_attach_adapter, - .detach_client = lm90_detach_client, + .probe = lm90_probe, + .remove = lm90_remove, + .id_table = lm90_id, + .detect = lm90_detect, + .address_data = &addr_data, }; /* @@ -211,7 +232,6 @@ static struct i2c_driver lm90_driver = { */ struct lm90_data { - struct i2c_client client; struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ @@ -477,40 +497,16 @@ static int lm90_read_reg(struct i2c_client* client, u8 reg, u8 *value) return 0; } -static int lm90_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_probe(adapter, &addr_data, lm90_detect); -} - -/* - * The following function does more than just detection. If detection - * succeeds, it also registers the new chip. - */ -static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int lm90_detect(struct i2c_client *new_client, int kind, + struct i2c_board_info *info) { - struct i2c_client *new_client; - struct lm90_data *data; - int err = 0; + struct i2c_adapter *adapter = new_client->adapter; + int address = new_client->addr; const char *name = ""; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - goto exit; - - if (!(data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - - /* The common I2C client data is placed right before the - LM90-specific data. */ - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &lm90_driver; - new_client->flags = 0; + return -ENODEV; /* * Now we do the remaining detection. A negative kind means that @@ -538,7 +534,7 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) LM90_REG_R_CONFIG1)) < 0 || (reg_convrate = i2c_smbus_read_byte_data(new_client, LM90_REG_R_CONVRATE)) < 0) - goto exit_free; + return -ENODEV; if ((address == 0x4C || address == 0x4D) && man_id == 0x01) { /* National Semiconductor */ @@ -546,7 +542,7 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) if ((reg_config2 = i2c_smbus_read_byte_data(new_client, LM90_REG_R_CONFIG2)) < 0) - goto exit_free; + return -ENODEV; if ((reg_config1 & 0x2A) == 0x00 && (reg_config2 & 0xF8) == 0x00 @@ -610,10 +606,11 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) dev_info(&adapter->dev, "Unsupported chip (man_id=0x%02X, " "chip_id=0x%02X).\n", man_id, chip_id); - goto exit_free; + return -ENODEV; } } + /* Fill the i2c board info */ if (kind == lm90) { name = "lm90"; } else if (kind == adm1032) { @@ -621,7 +618,7 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) /* The ADM1032 supports PEC, but only if combined transactions are not used. */ if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) - new_client->flags |= I2C_CLIENT_PEC; + info->flags |= I2C_CLIENT_PEC; } else if (kind == lm99) { name = "lm99"; } else if (kind == lm86) { @@ -633,23 +630,39 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) } else if (kind == adt7461) { name = "adt7461"; } + strlcpy(info->type, name, I2C_NAME_SIZE); + + return 0; +} + +static int lm90_probe(struct i2c_client *new_client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent); + struct lm90_data *data; + int err; - /* We can fill in the remaining client fields */ - strlcpy(new_client->name, name, I2C_NAME_SIZE); - data->valid = 0; - data->kind = kind; + data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit; + } + i2c_set_clientdata(new_client, data); mutex_init(&data->update_lock); - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(new_client))) - goto exit_free; + /* Set the device type */ + data->kind = id->driver_data; + if (data->kind == adm1032) { + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) + new_client->flags &= ~I2C_CLIENT_PEC; + } /* Initialize the LM90 chip */ lm90_init_client(new_client); /* Register sysfs hooks */ if ((err = sysfs_create_group(&new_client->dev.kobj, &lm90_group))) - goto exit_detach; + goto exit_free; if (new_client->flags & I2C_CLIENT_PEC) { if ((err = device_create_file(&new_client->dev, &dev_attr_pec))) @@ -672,8 +685,6 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) exit_remove_files: sysfs_remove_group(&new_client->dev.kobj, &lm90_group); device_remove_file(&new_client->dev, &dev_attr_pec); -exit_detach: - i2c_detach_client(new_client); exit_free: kfree(data); exit: @@ -710,10 +721,9 @@ static void lm90_init_client(struct i2c_client *client) i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); } -static int lm90_detach_client(struct i2c_client *client) +static int lm90_remove(struct i2c_client *client) { struct lm90_data *data = i2c_get_clientdata(client); - int err; hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &lm90_group); @@ -722,9 +732,6 @@ static int lm90_detach_client(struct i2c_client *client) device_remove_file(&client->dev, &sensor_dev_attr_temp2_offset.dev_attr); - if ((err = i2c_detach_client(client))) - return err; - kfree(data); return 0; } -- 2.34.1