Commit | Line | Data |
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b9618c0c MH |
1 | /* |
2 | * AD7606 SPI ADC driver | |
3 | * | |
4 | * Copyright 2011 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/spi/spi.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/err.h> | |
e61181d0 | 13 | |
06458e27 | 14 | #include <linux/iio/iio.h> |
b9618c0c MH |
15 | #include "ad7606.h" |
16 | ||
17 | #define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */ | |
18 | ||
19 | static int ad7606_spi_read_block(struct device *dev, | |
20 | int count, void *buf) | |
21 | { | |
22 | struct spi_device *spi = to_spi_device(dev); | |
23 | int i, ret; | |
7e982555 | 24 | unsigned short *data = buf; |
87787e5e | 25 | __be16 *bdata = buf; |
b9618c0c | 26 | |
31f8f066 | 27 | ret = spi_read(spi, buf, count * 2); |
b9618c0c MH |
28 | if (ret < 0) { |
29 | dev_err(&spi->dev, "SPI read error\n"); | |
30 | return ret; | |
31 | } | |
32 | ||
33 | for (i = 0; i < count; i++) | |
87787e5e | 34 | data[i] = be16_to_cpu(bdata[i]); |
b9618c0c MH |
35 | |
36 | return 0; | |
37 | } | |
38 | ||
39 | static const struct ad7606_bus_ops ad7606_spi_bops = { | |
40 | .read_block = ad7606_spi_read_block, | |
41 | }; | |
42 | ||
4ae1c61f | 43 | static int ad7606_spi_probe(struct spi_device *spi) |
b9618c0c | 44 | { |
e61181d0 | 45 | struct iio_dev *indio_dev; |
b9618c0c | 46 | |
e61181d0 | 47 | indio_dev = ad7606_probe(&spi->dev, spi->irq, NULL, |
e8ef49f0 IC |
48 | spi_get_device_id(spi)->driver_data, |
49 | &ad7606_spi_bops); | |
b9618c0c | 50 | |
e61181d0 MH |
51 | if (IS_ERR(indio_dev)) |
52 | return PTR_ERR(indio_dev); | |
b9618c0c | 53 | |
e61181d0 | 54 | spi_set_drvdata(spi, indio_dev); |
b9618c0c MH |
55 | |
56 | return 0; | |
57 | } | |
58 | ||
447d4f29 | 59 | static int ad7606_spi_remove(struct spi_device *spi) |
b9618c0c | 60 | { |
e61181d0 | 61 | struct iio_dev *indio_dev = dev_get_drvdata(&spi->dev); |
b9618c0c | 62 | |
8cbb36a0 | 63 | return ad7606_remove(indio_dev, spi->irq); |
b9618c0c MH |
64 | } |
65 | ||
b9618c0c MH |
66 | static const struct spi_device_id ad7606_id[] = { |
67 | {"ad7606-8", ID_AD7606_8}, | |
68 | {"ad7606-6", ID_AD7606_6}, | |
69 | {"ad7606-4", ID_AD7606_4}, | |
70 | {} | |
71 | }; | |
55e4390c | 72 | MODULE_DEVICE_TABLE(spi, ad7606_id); |
b9618c0c MH |
73 | |
74 | static struct spi_driver ad7606_driver = { | |
75 | .driver = { | |
76 | .name = "ad7606", | |
2c3a5236 | 77 | .pm = AD7606_PM_OPS, |
b9618c0c MH |
78 | }, |
79 | .probe = ad7606_spi_probe, | |
e543acf0 | 80 | .remove = ad7606_spi_remove, |
b9618c0c MH |
81 | .id_table = ad7606_id, |
82 | }; | |
ae6ae6fe | 83 | module_spi_driver(ad7606_driver); |
b9618c0c MH |
84 | |
85 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
86 | MODULE_DESCRIPTION("Analog Devices AD7606 ADC"); | |
87 | MODULE_LICENSE("GPL v2"); |