2 * AD7606 Parallel Interface ADC driver
4 * Copyright 2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/types.h>
12 #include <linux/err.h>
18 static int ad7606_par16_read_block(struct device *dev,
21 struct platform_device *pdev = to_platform_device(dev);
22 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
23 struct ad7606_state *st = iio_priv(indio_dev);
25 insw((unsigned long) st->base_address, buf, count);
30 static const struct ad7606_bus_ops ad7606_par16_bops = {
31 .read_block = ad7606_par16_read_block,
34 static int ad7606_par8_read_block(struct device *dev,
37 struct platform_device *pdev = to_platform_device(dev);
38 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
39 struct ad7606_state *st = iio_priv(indio_dev);
41 insb((unsigned long) st->base_address, buf, count * 2);
46 static const struct ad7606_bus_ops ad7606_par8_bops = {
47 .read_block = ad7606_par8_read_block,
50 static int __devinit ad7606_par_probe(struct platform_device *pdev)
53 struct iio_dev *indio_dev;
55 resource_size_t remap_size;
58 irq = platform_get_irq(pdev, 0);
60 dev_err(&pdev->dev, "no irq\n");
64 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
68 remap_size = resource_size(res);
70 /* Request the regions */
71 if (!request_mem_region(res->start, remap_size, "iio-ad7606")) {
75 addr = ioremap(res->start, remap_size);
81 indio_dev = ad7606_probe(&pdev->dev, irq, addr,
82 platform_get_device_id(pdev)->driver_data,
83 remap_size > 1 ? &ad7606_par16_bops :
86 if (IS_ERR(indio_dev)) {
87 ret = PTR_ERR(indio_dev);
91 platform_set_drvdata(pdev, indio_dev);
98 release_mem_region(res->start, remap_size);
103 static int __devexit ad7606_par_remove(struct platform_device *pdev)
105 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
106 struct resource *res;
107 struct ad7606_state *st = iio_priv(indio_dev);
109 ad7606_remove(indio_dev, platform_get_irq(pdev, 0));
111 iounmap(st->base_address);
112 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
113 release_mem_region(res->start, resource_size(res));
115 platform_set_drvdata(pdev, NULL);
121 static int ad7606_par_suspend(struct device *dev)
123 struct iio_dev *indio_dev = dev_get_drvdata(dev);
125 ad7606_suspend(indio_dev);
130 static int ad7606_par_resume(struct device *dev)
132 struct iio_dev *indio_dev = dev_get_drvdata(dev);
134 ad7606_resume(indio_dev);
139 static const struct dev_pm_ops ad7606_pm_ops = {
140 .suspend = ad7606_par_suspend,
141 .resume = ad7606_par_resume,
143 #define AD7606_PAR_PM_OPS (&ad7606_pm_ops)
146 #define AD7606_PAR_PM_OPS NULL
147 #endif /* CONFIG_PM */
149 static struct platform_device_id ad7606_driver_ids[] = {
152 .driver_data = ID_AD7606_8,
155 .driver_data = ID_AD7606_6,
158 .driver_data = ID_AD7606_4,
163 MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
165 static struct platform_driver ad7606_driver = {
166 .probe = ad7606_par_probe,
167 .remove = __devexit_p(ad7606_par_remove),
168 .id_table = ad7606_driver_ids,
171 .owner = THIS_MODULE,
172 .pm = AD7606_PAR_PM_OPS,
176 static int __init ad7606_init(void)
178 return platform_driver_register(&ad7606_driver);
181 static void __exit ad7606_cleanup(void)
183 platform_driver_unregister(&ad7606_driver);
186 module_init(ad7606_init);
187 module_exit(ad7606_cleanup);
189 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
190 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
191 MODULE_LICENSE("GPL v2");
192 MODULE_ALIAS("platform:ad7606_par");