forked from mirrors/linux
2985a5d884
Move ad7606 ADC driver out of staging and into the mainline. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* AD7606 Parallel Interface 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/platform_device.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/iio/iio.h>
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#include "ad7606.h"
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static int ad7606_par16_read_block(struct device *dev,
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int count, void *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad7606_state *st = iio_priv(indio_dev);
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insw((unsigned long)st->base_address, buf, count);
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return 0;
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}
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static const struct ad7606_bus_ops ad7606_par16_bops = {
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.read_block = ad7606_par16_read_block,
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};
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static int ad7606_par8_read_block(struct device *dev,
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int count, void *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad7606_state *st = iio_priv(indio_dev);
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insb((unsigned long)st->base_address, buf, count * 2);
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return 0;
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}
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static const struct ad7606_bus_ops ad7606_par8_bops = {
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.read_block = ad7606_par8_read_block,
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};
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static int ad7606_par_probe(struct platform_device *pdev)
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{
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const struct platform_device_id *id = platform_get_device_id(pdev);
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struct resource *res;
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void __iomem *addr;
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resource_size_t remap_size;
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int irq;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "no irq: %d\n", irq);
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return irq;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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addr = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(addr))
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return PTR_ERR(addr);
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remap_size = resource_size(res);
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return ad7606_probe(&pdev->dev, irq, addr,
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id->name, id->driver_data,
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remap_size > 1 ? &ad7606_par16_bops :
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&ad7606_par8_bops);
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}
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static const struct platform_device_id ad7606_driver_ids[] = {
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{ .name = "ad7605-4", .driver_data = ID_AD7605_4, },
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{ .name = "ad7606-4", .driver_data = ID_AD7606_4, },
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{ .name = "ad7606-6", .driver_data = ID_AD7606_6, },
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{ .name = "ad7606-8", .driver_data = ID_AD7606_8, },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
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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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{ },
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};
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MODULE_DEVICE_TABLE(of, ad7606_of_match);
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static struct platform_driver ad7606_driver = {
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.probe = ad7606_par_probe,
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.id_table = ad7606_driver_ids,
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.driver = {
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.name = "ad7606",
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.pm = AD7606_PM_OPS,
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.of_match_table = ad7606_of_match,
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},
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};
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module_platform_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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