int lis3l02dq_initialize_ring(struct iio_ring_buffer *ring)
{
return iio_ring_buffer_register(ring, 0);
}
int adis16209_initialize_ring(struct iio_ring_buffer *ring)
{
return iio_ring_buffer_register(ring, 0);
}
int max1363_initialize_ring(struct iio_ring_buffer *ring)
{
return iio_ring_buffer_register(ring);
};
static int __devinit ad7887_probe(struct spi_device *spi)
{
struct ad7887_platform_data *pdata = spi->dev.platform_data;
struct ad7887_state *st;
int ret, voltage_uv = 0;
st = kzalloc(sizeof(*st), GFP_KERNEL);
if (st == NULL) {
ret = -ENOMEM;
goto error_ret;
}
st->reg = regulator_get(&spi->dev, "vcc");
if (!IS_ERR(st->reg)) {
ret = regulator_enable(st->reg);
if (ret)
goto error_put_reg;
voltage_uv = regulator_get_voltage(st->reg);
}
st->chip_info =
&ad7887_chip_info_tbl[spi_get_device_id(spi)->driver_data];
spi_set_drvdata(spi, st);
atomic_set(&st->protect_ring, 0);
st->spi = spi;
st->indio_dev = iio_allocate_device();
if (st->indio_dev == NULL) {
ret = -ENOMEM;
goto error_disable_reg;
}
/* Estabilish that the iio_dev is a child of the spi device */
st->indio_dev->dev.parent = &spi->dev;
st->indio_dev->attrs = &ad7887_attribute_group;
st->indio_dev->dev_data = (void *)(st);
st->indio_dev->driver_module = THIS_MODULE;
st->indio_dev->modes = INDIO_DIRECT_MODE;
/* Setup default message */
st->tx_cmd_buf[0] = AD7887_CH_AIN0 | AD7887_PM_MODE4 |
((pdata && pdata->use_onchip_ref) ?
0 : AD7887_REF_DIS);
st->xfer[0].rx_buf = &st->data[0];
st->xfer[0].tx_buf = &st->tx_cmd_buf[0];
st->xfer[0].len = 2;
spi_message_init(&st->msg[AD7887_CH0]);
spi_message_add_tail(&st->xfer[0], &st->msg[AD7887_CH0]);
if (pdata && pdata->en_dual) {
st->tx_cmd_buf[0] |= AD7887_DUAL | AD7887_REF_DIS;
st->tx_cmd_buf[2] = AD7887_CH_AIN1 | AD7887_DUAL |
AD7887_REF_DIS | AD7887_PM_MODE4;
st->tx_cmd_buf[4] = AD7887_CH_AIN0 | AD7887_DUAL |
AD7887_REF_DIS | AD7887_PM_MODE4;
st->tx_cmd_buf[6] = AD7887_CH_AIN1 | AD7887_DUAL |
AD7887_REF_DIS | AD7887_PM_MODE4;
st->xfer[1].rx_buf = &st->data[0];
st->xfer[1].tx_buf = &st->tx_cmd_buf[2];
st->xfer[1].len = 2;
st->xfer[2].rx_buf = &st->data[2];
st->xfer[2].tx_buf = &st->tx_cmd_buf[4];
st->xfer[2].len = 2;
spi_message_init(&st->msg[AD7887_CH0_CH1]);
spi_message_add_tail(&st->xfer[1], &st->msg[AD7887_CH0_CH1]);
spi_message_add_tail(&st->xfer[2], &st->msg[AD7887_CH0_CH1]);
st->xfer[3].rx_buf = &st->data[0];
st->xfer[3].tx_buf = &st->tx_cmd_buf[6];
st->xfer[3].len = 2;
spi_message_init(&st->msg[AD7887_CH1]);
spi_message_add_tail(&st->xfer[3], &st->msg[AD7887_CH1]);
st->en_dual = true;
if (pdata && pdata->vref_mv)
st->int_vref_mv = pdata->vref_mv;
else if (voltage_uv)
st->int_vref_mv = voltage_uv / 1000;
else
dev_warn(&spi->dev, "reference voltage unspecified\n");
} else {
if (pdata && pdata->vref_mv)
st->int_vref_mv = pdata->vref_mv;
else if (pdata && pdata->use_onchip_ref)
st->int_vref_mv = st->chip_info->int_vref_mv;
else
dev_warn(&spi->dev, "reference voltage unspecified\n");
}
ret = ad7887_register_ring_funcs_and_init(st->indio_dev);
if (ret)
goto error_free_device;
ret = iio_device_register(st->indio_dev);
if (ret)
goto error_free_device;
ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
if (ret)
goto error_cleanup_ring;
return 0;
error_cleanup_ring:
ad7887_ring_cleanup(st->indio_dev);
iio_device_unregister(st->indio_dev);
error_free_device:
iio_free_device(st->indio_dev);
error_disable_reg:
if (!IS_ERR(st->reg))
regulator_disable(st->reg);
error_put_reg:
if (!IS_ERR(st->reg))
regulator_put(st->reg);
kfree(st);
error_ret:
return ret;
}
