From: Jean Delvare Date: Wed, 16 Jul 2008 17:30:12 +0000 (+0200) Subject: hwmon: (fschmd) Convert to a new-style i2c driver X-Git-Tag: v4.14-rc1~28952^2~20 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=40ac1994bf988dac05434f856c2a4fa24e22b2ea;p=platform%2Fkernel%2Flinux-rpi.git hwmon: (fschmd) Convert to a new-style i2c driver The new-style fschmd driver implements the optional detect() callback to cover the use cases of the legacy driver. Signed-off-by: Jean Delvare Cc: Hans de Goede --- diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c index bd89d270a5ed..967170368933 100644 --- a/drivers/hwmon/fschmd.c +++ b/drivers/hwmon/fschmd.c @@ -171,20 +171,37 @@ static const int FSCHMD_NO_TEMP_SENSORS[5] = { 3, 3, 4, 3, 5 }; * Functions declarations */ -static int fschmd_attach_adapter(struct i2c_adapter *adapter); -static int fschmd_detach_client(struct i2c_client *client); +static int fschmd_probe(struct i2c_client *client, + const struct i2c_device_id *id); +static int fschmd_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info); +static int fschmd_remove(struct i2c_client *client); static struct fschmd_data *fschmd_update_device(struct device *dev); /* * Driver data (common to all clients) */ +static const struct i2c_device_id fschmd_id[] = { + { "fscpos", fscpos }, + { "fscher", fscher }, + { "fscscy", fscscy }, + { "fschrc", fschrc }, + { "fschmd", fschmd }, + { } +}; +MODULE_DEVICE_TABLE(i2c, fschmd_id); + static struct i2c_driver fschmd_driver = { + .class = I2C_CLASS_HWMON, .driver = { .name = FSCHMD_NAME, }, - .attach_adapter = fschmd_attach_adapter, - .detach_client = fschmd_detach_client, + .probe = fschmd_probe, + .remove = fschmd_remove, + .id_table = fschmd_id, + .detect = fschmd_detect, + .address_data = &addr_data, }; /* @@ -192,7 +209,6 @@ static struct i2c_driver fschmd_driver = { */ struct fschmd_data { - struct i2c_client client; struct device *hwmon_dev; struct mutex update_lock; int kind; @@ -269,7 +285,7 @@ static ssize_t store_temp_max(struct device *dev, struct device_attribute v = SENSORS_LIMIT(v, -128, 127) + 128; mutex_lock(&data->update_lock); - i2c_smbus_write_byte_data(&data->client, + i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_TEMP_LIMIT[data->kind][index], v); data->temp_max[index] = v; mutex_unlock(&data->update_lock); @@ -346,14 +362,14 @@ static ssize_t store_fan_div(struct device *dev, struct device_attribute mutex_lock(&data->update_lock); - reg = i2c_smbus_read_byte_data(&data->client, + reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_FAN_RIPPLE[data->kind][index]); /* bits 2..7 reserved => mask with 0x03 */ reg &= ~0x03; reg |= v; - i2c_smbus_write_byte_data(&data->client, + i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg); data->fan_ripple[index] = reg; @@ -416,7 +432,7 @@ static ssize_t store_pwm_auto_point1_pwm(struct device *dev, mutex_lock(&data->update_lock); - i2c_smbus_write_byte_data(&data->client, + i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_FAN_MIN[data->kind][index], v); data->fan_min[index] = v; @@ -448,14 +464,14 @@ static ssize_t store_alert_led(struct device *dev, mutex_lock(&data->update_lock); - reg = i2c_smbus_read_byte_data(&data->client, FSCHMD_REG_CONTROL); + reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL); if (v) reg |= FSCHMD_CONTROL_ALERT_LED_MASK; else reg &= ~FSCHMD_CONTROL_ALERT_LED_MASK; - i2c_smbus_write_byte_data(&data->client, FSCHMD_REG_CONTROL, reg); + i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg); data->global_control = reg; @@ -600,32 +616,15 @@ static void fschmd_dmi_decode(const struct dmi_header *header) } } -static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind) +static int fschmd_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { - struct i2c_client *client; - struct fschmd_data *data; - u8 revision; - const char * const names[5] = { "Poseidon", "Hermes", "Scylla", - "Heracles", "Heimdall" }; + struct i2c_adapter *adapter = client->adapter; const char * const client_names[5] = { "fscpos", "fscher", "fscscy", "fschrc", "fschmd" }; - int i, err = 0; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - return 0; - - /* 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 i2c_smbus_read_byte_data. */ - if (!(data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL))) - return -ENOMEM; - - client = &data->client; - i2c_set_clientdata(client, data); - client->addr = address; - client->adapter = adapter; - client->driver = &fschmd_driver; - mutex_init(&data->update_lock); + return -ENODEV; /* Detect & Identify the chip */ if (kind <= 0) { @@ -650,9 +649,31 @@ static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind) else if (!strcmp(id, "HMD")) kind = fschmd; else - goto exit_free; + return -ENODEV; } + strlcpy(info->type, client_names[kind - 1], I2C_NAME_SIZE); + + return 0; +} + +static int fschmd_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct fschmd_data *data; + u8 revision; + const char * const names[5] = { "Poseidon", "Hermes", "Scylla", + "Heracles", "Heimdall" }; + int i, err; + enum chips kind = id->driver_data; + + data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + i2c_set_clientdata(client, data); + mutex_init(&data->update_lock); + if (kind == fscpos) { /* The Poseidon has hardwired temp limits, fill these in for the alarm resetting code */ @@ -674,11 +695,6 @@ static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind) /* i2c kind goes from 1-5, we want from 0-4 to address arrays */ data->kind = kind - 1; - strlcpy(client->name, client_names[data->kind], I2C_NAME_SIZE); - - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(client))) - goto exit_free; for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++) { err = device_create_file(&client->dev, @@ -726,25 +742,14 @@ static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind) return 0; exit_detach: - fschmd_detach_client(client); /* will also free data for us */ - return err; - -exit_free: - kfree(data); + fschmd_remove(client); /* will also free data for us */ return err; } -static int fschmd_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_probe(adapter, &addr_data, fschmd_detect); -} - -static int fschmd_detach_client(struct i2c_client *client) +static int fschmd_remove(struct i2c_client *client) { struct fschmd_data *data = i2c_get_clientdata(client); - int i, err; + int i; /* Check if registered in case we're called from fschmd_detect to cleanup after an error */ @@ -760,9 +765,6 @@ static int fschmd_detach_client(struct i2c_client *client) device_remove_file(&client->dev, &fschmd_fan_attr[i].dev_attr); - if ((err = i2c_detach_client(client))) - return err; - kfree(data); return 0; }