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- /*
- * AD7606 SPI ADC driver
- *
- * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
- #include <linux/module.h>
- #include <linux/spi/spi.h>
- #include <linux/types.h>
- #include <linux/err.h>
- #include <linux/iio/iio.h>
- #include "ad7606.h"
- #define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */
- static int ad7606_spi_read_block(struct device *dev,
- int count, void *buf)
- {
- struct spi_device *spi = to_spi_device(dev);
- int i, ret;
- unsigned short *data = buf;
- ret = spi_read(spi, buf, count * 2);
- if (ret < 0) {
- dev_err(&spi->dev, "SPI read error\n");
- return ret;
- }
- for (i = 0; i < count; i++)
- data[i] = be16_to_cpu(data[i]);
- return 0;
- }
- static const struct ad7606_bus_ops ad7606_spi_bops = {
- .read_block = ad7606_spi_read_block,
- };
- static int ad7606_spi_probe(struct spi_device *spi)
- {
- struct iio_dev *indio_dev;
- indio_dev = ad7606_probe(&spi->dev, spi->irq, NULL,
- spi_get_device_id(spi)->driver_data,
- &ad7606_spi_bops);
- if (IS_ERR(indio_dev))
- return PTR_ERR(indio_dev);
- spi_set_drvdata(spi, indio_dev);
- return 0;
- }
- static int ad7606_spi_remove(struct spi_device *spi)
- {
- struct iio_dev *indio_dev = dev_get_drvdata(&spi->dev);
- return ad7606_remove(indio_dev, spi->irq);
- }
- #ifdef CONFIG_PM
- static int ad7606_spi_suspend(struct device *dev)
- {
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- ad7606_suspend(indio_dev);
- return 0;
- }
- static int ad7606_spi_resume(struct device *dev)
- {
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- ad7606_resume(indio_dev);
- return 0;
- }
- static const struct dev_pm_ops ad7606_pm_ops = {
- .suspend = ad7606_spi_suspend,
- .resume = ad7606_spi_resume,
- };
- #define AD7606_SPI_PM_OPS (&ad7606_pm_ops)
- #else
- #define AD7606_SPI_PM_OPS NULL
- #endif
- static const struct spi_device_id ad7606_id[] = {
- {"ad7606-8", ID_AD7606_8},
- {"ad7606-6", ID_AD7606_6},
- {"ad7606-4", ID_AD7606_4},
- {}
- };
- MODULE_DEVICE_TABLE(spi, ad7606_id);
- static struct spi_driver ad7606_driver = {
- .driver = {
- .name = "ad7606",
- .pm = AD7606_SPI_PM_OPS,
- },
- .probe = ad7606_spi_probe,
- .remove = ad7606_spi_remove,
- .id_table = ad7606_id,
- };
- module_spi_driver(ad7606_driver);
- MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
- MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
- MODULE_LICENSE("GPL v2");
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