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
ad7606_par16_read_block(struct device * dev,int count,void * buf)18 static 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((unsigned long)st->base_address, buf, count);
25
26 return 0;
27 }
28
29 static const struct ad7606_bus_ops ad7606_par16_bops = {
30 .read_block = ad7606_par16_read_block,
31 };
32
ad7606_par8_read_block(struct device * dev,int count,void * buf)33 static 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((unsigned long)st->base_address, buf, count * 2);
40
41 return 0;
42 }
43
44 static const struct ad7606_bus_ops ad7606_par8_bops = {
45 .read_block = ad7606_par8_read_block,
46 };
47
ad7606_par_probe(struct platform_device * pdev)48 static 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, 0, &res);
61 if (IS_ERR(addr))
62 return PTR_ERR(addr);
63
64 remap_size = resource_size(res);
65
66 return ad7606_probe(&pdev->dev, irq, addr,
67 id->name, id->driver_data,
68 remap_size > 1 ? &ad7606_par16_bops :
69 &ad7606_par8_bops);
70 }
71
72 static 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 };
79 MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
80
81 static 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 };
88 MODULE_DEVICE_TABLE(of, ad7606_of_match);
89
90 static 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 };
99 module_platform_driver(ad7606_driver);
100
101 MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
102 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
103 MODULE_LICENSE("GPL v2");
104 MODULE_IMPORT_NS(IIO_AD7606);
105