static int mma8452_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
mma8452_trigger_cleanup(indio_dev);
mma8452_standby(iio_priv(indio_dev));
return 0;
}
static int mma8452_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
iio_triggered_buffer_cleanup(indio_dev);
mma8452_trigger_cleanup(indio_dev);
mma8452_standby(iio_priv(indio_dev));
return 0;
}
static int mma8452_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mma8452_data *data;
struct iio_dev *indio_dev;
int ret;
const struct of_device_id *match;
match = of_match_device(mma8452_dt_ids, &client->dev);
if (!match) {
dev_err(&client->dev, "unknown device model\n");
return -ENODEV;
}
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;
data = iio_priv(indio_dev);
data->client = client;
mutex_init(&data->lock);
data->chip_info = match->data;
ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
if (ret < 0)
return ret;
switch (ret) {
case MMA8452_DEVICE_ID:
case MMA8453_DEVICE_ID:
case MMA8652_DEVICE_ID:
case MMA8653_DEVICE_ID:
if (ret == data->chip_info->chip_id)
break;
default:
return -ENODEV;
}
dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n",
match->compatible, data->chip_info->chip_id);
i2c_set_clientdata(client, indio_dev);
indio_dev->info = &mma8452_info;
indio_dev->name = id->name;
indio_dev->dev.parent = &client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = data->chip_info->channels;
indio_dev->num_channels = data->chip_info->num_channels;
indio_dev->available_scan_masks = mma8452_scan_masks;
ret = mma8452_reset(client);
if (ret < 0)
return ret;
data->data_cfg = MMA8452_DATA_CFG_FS_2G;
ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG,
data->data_cfg);
if (ret < 0)
return ret;
/*
* By default set transient threshold to max to avoid events if
* enabling without configuring threshold.
*/
ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS,
MMA8452_TRANSIENT_THS_MASK);
if (ret < 0)
return ret;
if (client->irq) {
/*
* Although we enable the interrupt sources once and for
* all here the event detection itself is not enabled until
* userspace asks for it by mma8452_write_event_config()
*/
int supported_interrupts = MMA8452_INT_DRDY |
MMA8452_INT_TRANS |
MMA8452_INT_FF_MT;
int enabled_interrupts = MMA8452_INT_TRANS |
MMA8452_INT_FF_MT;
int irq2;
irq2 = of_irq_get_byname(client->dev.of_node, "INT2");
if (irq2 == client->irq) {
dev_dbg(&client->dev, "using interrupt line INT2\n");
} else {
ret = i2c_smbus_write_byte_data(client,
MMA8452_CTRL_REG5,
supported_interrupts);
if (ret < 0)
return ret;
dev_dbg(&client->dev, "using interrupt line INT1\n");
}
ret = i2c_smbus_write_byte_data(client,
MMA8452_CTRL_REG4,
enabled_interrupts);
if (ret < 0)
return ret;
ret = mma8452_trigger_setup(indio_dev);
if (ret < 0)
return ret;
}
data->ctrl_reg1 = MMA8452_CTRL_ACTIVE |
(MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT);
ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,
data->ctrl_reg1);
if (ret < 0)
goto trigger_cleanup;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
mma8452_trigger_handler, NULL);
if (ret < 0)
goto trigger_cleanup;
if (client->irq) {
ret = devm_request_threaded_irq(&client->dev,
client->irq,
NULL, mma8452_interrupt,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, indio_dev);
if (ret)
goto buffer_cleanup;
}
ret = iio_device_register(indio_dev);
if (ret < 0)
goto buffer_cleanup;
return 0;
buffer_cleanup:
iio_triggered_buffer_cleanup(indio_dev);
trigger_cleanup:
mma8452_trigger_cleanup(indio_dev);
return ret;
}
static int mma8452_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mma8452_data *data;
struct iio_dev *indio_dev;
int ret;
ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
if (ret < 0)
return ret;
if (ret != MMA8452_DEVICE_ID)
return -ENODEV;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;
data = iio_priv(indio_dev);
data->client = client;
mutex_init(&data->lock);
i2c_set_clientdata(client, indio_dev);
indio_dev->info = &mma8452_info;
indio_dev->name = id->name;
indio_dev->dev.parent = &client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = mma8452_channels;
indio_dev->num_channels = ARRAY_SIZE(mma8452_channels);
indio_dev->available_scan_masks = mma8452_scan_masks;
ret = mma8452_reset(client);
if (ret < 0)
return ret;
data->data_cfg = MMA8452_DATA_CFG_FS_2G;
ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG,
data->data_cfg);
if (ret < 0)
return ret;
/*
* By default set transient threshold to max to avoid events if
* enabling without configuring threshold.
*/
ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS,
MMA8452_TRANSIENT_THS_MASK);
if (ret < 0)
return ret;
if (client->irq) {
/*
* Although we enable the transient interrupt source once and
* for all here the transient event detection itself is not
* enabled until userspace asks for it by
* mma8452_write_event_config()
*/
int supported_interrupts = MMA8452_INT_DRDY | MMA8452_INT_TRANS;
int enabled_interrupts = MMA8452_INT_TRANS;
/* Assume wired to INT1 pin */
ret = i2c_smbus_write_byte_data(client,
MMA8452_CTRL_REG5,
supported_interrupts);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client,
MMA8452_CTRL_REG4,
enabled_interrupts);
if (ret < 0)
return ret;
ret = mma8452_trigger_setup(indio_dev);
if (ret < 0)
return ret;
}
data->ctrl_reg1 = MMA8452_CTRL_ACTIVE |
(MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT);
ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,
data->ctrl_reg1);
if (ret < 0)
goto trigger_cleanup;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
mma8452_trigger_handler, NULL);
if (ret < 0)
goto trigger_cleanup;
if (client->irq) {
ret = devm_request_threaded_irq(&client->dev,
client->irq,
NULL, mma8452_interrupt,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, indio_dev);
if (ret)
goto buffer_cleanup;
}
ret = iio_device_register(indio_dev);
if (ret < 0)
goto buffer_cleanup;
return 0;
buffer_cleanup:
iio_triggered_buffer_cleanup(indio_dev);
trigger_cleanup:
mma8452_trigger_cleanup(indio_dev);
return ret;
}
