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;
26 ret = spi_read(spi, buf, count * 2);
28 dev_err(&spi->dev, "SPI read error\n");
32 for (i = 0; i < count; i++)
33 data[i] = be16_to_cpu(data[i]);
38 static const struct ad7606_bus_ops ad7606_spi_bops = {
39 .read_block = ad7606_spi_read_block,
42 static int ad7606_spi_probe(struct spi_device *spi)
44 struct iio_dev *indio_dev;
46 indio_dev = ad7606_probe(&spi->dev, spi->irq, NULL,
47 spi_get_device_id(spi)->driver_data,
50 if (IS_ERR(indio_dev))
51 return PTR_ERR(indio_dev);
53 spi_set_drvdata(spi, 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);
66 static int ad7606_spi_suspend(struct device *dev)
68 struct iio_dev *indio_dev = dev_get_drvdata(dev);
70 ad7606_suspend(indio_dev);
75 static int ad7606_spi_resume(struct device *dev)
77 struct iio_dev *indio_dev = dev_get_drvdata(dev);
79 ad7606_resume(indio_dev);
84 static const struct dev_pm_ops ad7606_pm_ops = {
85 .suspend = ad7606_spi_suspend,
86 .resume = ad7606_spi_resume,
88 #define AD7606_SPI_PM_OPS (&ad7606_pm_ops)
91 #define AD7606_SPI_PM_OPS NULL
94 static const struct spi_device_id ad7606_id[] = {
95 {"ad7606-8", ID_AD7606_8},
96 {"ad7606-6", ID_AD7606_6},
97 {"ad7606-4", ID_AD7606_4},
100 MODULE_DEVICE_TABLE(spi, ad7606_id);
102 static struct spi_driver ad7606_driver = {
105 .owner = THIS_MODULE,
106 .pm = AD7606_SPI_PM_OPS,
108 .probe = ad7606_spi_probe,
109 .remove = ad7606_spi_remove,
110 .id_table = ad7606_id,
112 module_spi_driver(ad7606_driver);
114 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
115 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
116 MODULE_LICENSE("GPL v2");