1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * AD7606 Parallel Interface ADC driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2011 Analog Devices Inc.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/platform_device.h>
10*4882a593Smuzhiyun #include <linux/types.h>
11*4882a593Smuzhiyun #include <linux/err.h>
12*4882a593Smuzhiyun #include <linux/io.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <linux/iio/iio.h>
15*4882a593Smuzhiyun #include "ad7606.h"
16*4882a593Smuzhiyun
ad7606_par16_read_block(struct device * dev,int count,void * buf)17*4882a593Smuzhiyun static int ad7606_par16_read_block(struct device *dev,
18*4882a593Smuzhiyun int count, void *buf)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun struct iio_dev *indio_dev = dev_get_drvdata(dev);
21*4882a593Smuzhiyun struct ad7606_state *st = iio_priv(indio_dev);
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun insw((unsigned long)st->base_address, buf, count);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun return 0;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static const struct ad7606_bus_ops ad7606_par16_bops = {
29*4882a593Smuzhiyun .read_block = ad7606_par16_read_block,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
ad7606_par8_read_block(struct device * dev,int count,void * buf)32*4882a593Smuzhiyun static int ad7606_par8_read_block(struct device *dev,
33*4882a593Smuzhiyun int count, void *buf)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun struct iio_dev *indio_dev = dev_get_drvdata(dev);
36*4882a593Smuzhiyun struct ad7606_state *st = iio_priv(indio_dev);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun insb((unsigned long)st->base_address, buf, count * 2);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun return 0;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun static const struct ad7606_bus_ops ad7606_par8_bops = {
44*4882a593Smuzhiyun .read_block = ad7606_par8_read_block,
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun
ad7606_par_probe(struct platform_device * pdev)47*4882a593Smuzhiyun static int ad7606_par_probe(struct platform_device *pdev)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun const struct platform_device_id *id = platform_get_device_id(pdev);
50*4882a593Smuzhiyun struct resource *res;
51*4882a593Smuzhiyun void __iomem *addr;
52*4882a593Smuzhiyun resource_size_t remap_size;
53*4882a593Smuzhiyun int irq;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun irq = platform_get_irq(pdev, 0);
56*4882a593Smuzhiyun if (irq < 0)
57*4882a593Smuzhiyun return irq;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
60*4882a593Smuzhiyun addr = devm_ioremap_resource(&pdev->dev, res);
61*4882a593Smuzhiyun if (IS_ERR(addr))
62*4882a593Smuzhiyun return PTR_ERR(addr);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun remap_size = resource_size(res);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun return ad7606_probe(&pdev->dev, irq, addr,
67*4882a593Smuzhiyun id->name, id->driver_data,
68*4882a593Smuzhiyun remap_size > 1 ? &ad7606_par16_bops :
69*4882a593Smuzhiyun &ad7606_par8_bops);
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun static const struct platform_device_id ad7606_driver_ids[] = {
73*4882a593Smuzhiyun { .name = "ad7605-4", .driver_data = ID_AD7605_4, },
74*4882a593Smuzhiyun { .name = "ad7606-4", .driver_data = ID_AD7606_4, },
75*4882a593Smuzhiyun { .name = "ad7606-6", .driver_data = ID_AD7606_6, },
76*4882a593Smuzhiyun { .name = "ad7606-8", .driver_data = ID_AD7606_8, },
77*4882a593Smuzhiyun { }
78*4882a593Smuzhiyun };
79*4882a593Smuzhiyun MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun static const struct of_device_id ad7606_of_match[] = {
82*4882a593Smuzhiyun { .compatible = "adi,ad7605-4" },
83*4882a593Smuzhiyun { .compatible = "adi,ad7606-4" },
84*4882a593Smuzhiyun { .compatible = "adi,ad7606-6" },
85*4882a593Smuzhiyun { .compatible = "adi,ad7606-8" },
86*4882a593Smuzhiyun { },
87*4882a593Smuzhiyun };
88*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, ad7606_of_match);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun static struct platform_driver ad7606_driver = {
91*4882a593Smuzhiyun .probe = ad7606_par_probe,
92*4882a593Smuzhiyun .id_table = ad7606_driver_ids,
93*4882a593Smuzhiyun .driver = {
94*4882a593Smuzhiyun .name = "ad7606",
95*4882a593Smuzhiyun .pm = AD7606_PM_OPS,
96*4882a593Smuzhiyun .of_match_table = ad7606_of_match,
97*4882a593Smuzhiyun },
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun module_platform_driver(ad7606_driver);
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
102*4882a593Smuzhiyun MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
103*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
104