2 * AD7606 SPI ADC driver
4 * Copyright 2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
9 #include <linux/module.h>
10 #include <linux/spi/spi.h>
11 #include <linux/types.h>
12 #include <linux/err.h>
14 #include <linux/iio/iio.h>
17 #define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */
19 static int ad7606_spi_read_block(struct device *dev,
22 struct spi_device *spi = to_spi_device(dev);
24 unsigned short *data = buf;
27 ret = spi_read(spi, buf, count * 2);
29 dev_err(&spi->dev, "SPI read error\n");
33 for (i = 0; i < count; i++)
34 data[i] = be16_to_cpu(bdata[i]);
39 static const struct ad7606_bus_ops ad7606_spi_bops = {
40 .read_block = ad7606_spi_read_block,
43 static int ad7606_spi_probe(struct spi_device *spi)
45 const struct spi_device_id *id = spi_get_device_id(spi);
46 struct iio_dev *indio_dev;
48 indio_dev = ad7606_probe(&spi->dev, spi->irq, NULL,
49 id->name, id->driver_data,
52 if (IS_ERR(indio_dev))
53 return PTR_ERR(indio_dev);
58 static int ad7606_spi_remove(struct spi_device *spi)
60 struct iio_dev *indio_dev = dev_get_drvdata(&spi->dev);
62 return ad7606_remove(indio_dev, spi->irq);
65 static const struct spi_device_id ad7606_id[] = {
66 {"ad7606-8", ID_AD7606_8},
67 {"ad7606-6", ID_AD7606_6},
68 {"ad7606-4", ID_AD7606_4},
71 MODULE_DEVICE_TABLE(spi, ad7606_id);
73 static struct spi_driver ad7606_driver = {
78 .probe = ad7606_spi_probe,
79 .remove = ad7606_spi_remove,
80 .id_table = ad7606_id,
82 module_spi_driver(ad7606_driver);
84 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
85 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
86 MODULE_LICENSE("GPL v2");