1// SPDX-License-Identifier: GPL-2.0
2/*
3 * AD7606 Parallel Interface ADC driver
4 *
5 * Copyright 2011 Analog Devices Inc.
6 */
7
8#include <linux/mod_devicetable.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/types.h>
12#include <linux/err.h>
13#include <linux/io.h>
14
15#include <linux/iio/iio.h>
16#include "ad7606.h"
17
18static int ad7606_par16_read_block(struct device *dev,
19 int count, void *buf)
20{
21 struct iio_dev *indio_dev = dev_get_drvdata(dev);
22 struct ad7606_state *st = iio_priv(indio_dev);
23
24 insw(port: (unsigned long)st->base_address, addr: buf, count);
25
26 return 0;
27}
28
29static const struct ad7606_bus_ops ad7606_par16_bops = {
30 .read_block = ad7606_par16_read_block,
31};
32
33static int ad7606_par8_read_block(struct device *dev,
34 int count, void *buf)
35{
36 struct iio_dev *indio_dev = dev_get_drvdata(dev);
37 struct ad7606_state *st = iio_priv(indio_dev);
38
39 insb(port: (unsigned long)st->base_address, addr: buf, count: count * 2);
40
41 return 0;
42}
43
44static const struct ad7606_bus_ops ad7606_par8_bops = {
45 .read_block = ad7606_par8_read_block,
46};
47
48static int ad7606_par_probe(struct platform_device *pdev)
49{
50 const struct platform_device_id *id = platform_get_device_id(pdev);
51 struct resource *res;
52 void __iomem *addr;
53 resource_size_t remap_size;
54 int irq;
55
56 irq = platform_get_irq(pdev, 0);
57 if (irq < 0)
58 return irq;
59
60 addr = devm_platform_get_and_ioremap_resource(pdev, index: 0, res: &res);
61 if (IS_ERR(ptr: addr))
62 return PTR_ERR(ptr: addr);
63
64 remap_size = resource_size(res);
65
66 return ad7606_probe(dev: &pdev->dev, irq, base_address: addr,
67 name: id->name, id: id->driver_data,
68 bops: remap_size > 1 ? &ad7606_par16_bops :
69 &ad7606_par8_bops);
70}
71
72static const struct platform_device_id ad7606_driver_ids[] = {
73 { .name = "ad7605-4", .driver_data = ID_AD7605_4, },
74 { .name = "ad7606-4", .driver_data = ID_AD7606_4, },
75 { .name = "ad7606-6", .driver_data = ID_AD7606_6, },
76 { .name = "ad7606-8", .driver_data = ID_AD7606_8, },
77 { }
78};
79MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
80
81static const struct of_device_id ad7606_of_match[] = {
82 { .compatible = "adi,ad7605-4" },
83 { .compatible = "adi,ad7606-4" },
84 { .compatible = "adi,ad7606-6" },
85 { .compatible = "adi,ad7606-8" },
86 { },
87};
88MODULE_DEVICE_TABLE(of, ad7606_of_match);
89
90static struct platform_driver ad7606_driver = {
91 .probe = ad7606_par_probe,
92 .id_table = ad7606_driver_ids,
93 .driver = {
94 .name = "ad7606",
95 .pm = AD7606_PM_OPS,
96 .of_match_table = ad7606_of_match,
97 },
98};
99module_platform_driver(ad7606_driver);
100
101MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
102MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
103MODULE_LICENSE("GPL v2");
104MODULE_IMPORT_NS(IIO_AD7606);
105

source code of linux/drivers/iio/adc/ad7606_par.c