85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* AD7606 SPI ADC driver
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*
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* Copyright 2011 Analog Devices Inc.
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*/
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/iio/iio.h>
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#include "ad7606.h"
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#define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */
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static int ad7606_spi_read_block(struct device *dev,
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int count, void *buf)
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{
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struct spi_device *spi = to_spi_device(dev);
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int i, ret;
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unsigned short *data = buf;
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__be16 *bdata = buf;
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ret = spi_read(spi, buf, count * 2);
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if (ret < 0) {
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dev_err(&spi->dev, "SPI read error\n");
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return ret;
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}
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for (i = 0; i < count; i++)
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data[i] = be16_to_cpu(bdata[i]);
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return 0;
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}
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static const struct ad7606_bus_ops ad7606_spi_bops = {
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.read_block = ad7606_spi_read_block,
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};
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static int ad7606_spi_probe(struct spi_device *spi)
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{
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const struct spi_device_id *id = spi_get_device_id(spi);
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return ad7606_probe(&spi->dev, spi->irq, NULL,
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id->name, id->driver_data,
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&ad7606_spi_bops);
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}
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static const struct spi_device_id ad7606_id_table[] = {
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{ "ad7605-4", ID_AD7605_4 },
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{ "ad7606-4", ID_AD7606_4 },
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{ "ad7606-6", ID_AD7606_6 },
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{ "ad7606-8", ID_AD7606_8 },
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{ "ad7616", ID_AD7616 },
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{}
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};
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MODULE_DEVICE_TABLE(spi, ad7606_id_table);
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static const struct of_device_id ad7606_of_match[] = {
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{ .compatible = "adi,ad7605-4" },
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{ .compatible = "adi,ad7606-4" },
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{ .compatible = "adi,ad7606-6" },
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{ .compatible = "adi,ad7606-8" },
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{ .compatible = "adi,ad7616" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, ad7606_of_match);
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static struct spi_driver ad7606_driver = {
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.driver = {
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.name = "ad7606",
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.of_match_table = ad7606_of_match,
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.pm = AD7606_PM_OPS,
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},
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.probe = ad7606_spi_probe,
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.id_table = ad7606_id_table,
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};
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module_spi_driver(ad7606_driver);
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MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
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MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
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MODULE_LICENSE("GPL v2");
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