ad714x-spi.c (c0409feb86893f5ccf73964c7b2b47ca64bdb014) ad714x-spi.c (9eff794b777ac9ca034129a1b637204000c8fb29)
1/*
2 * AD714X CapTouch Programmable Controller driver (SPI bus)
3 *
1/*
2 * AD714X CapTouch Programmable Controller driver (SPI bus)
3 *
4 * Copyright 2009 Analog Devices Inc.
4 * Copyright 2009-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/input.h> /* BUS_SPI */
10#include <linux/module.h>
11#include <linux/spi/spi.h>
12#include <linux/pm.h>

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26{
27 return ad714x_enable(spi_get_drvdata(to_spi_device(dev)));
28}
29#endif
30
31static SIMPLE_DEV_PM_OPS(ad714x_spi_pm, ad714x_spi_suspend, ad714x_spi_resume);
32
33static int ad714x_spi_read(struct ad714x_chip *chip,
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/input.h> /* BUS_SPI */
10#include <linux/module.h>
11#include <linux/spi/spi.h>
12#include <linux/pm.h>

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26{
27 return ad714x_enable(spi_get_drvdata(to_spi_device(dev)));
28}
29#endif
30
31static SIMPLE_DEV_PM_OPS(ad714x_spi_pm, ad714x_spi_suspend, ad714x_spi_resume);
32
33static int ad714x_spi_read(struct ad714x_chip *chip,
34 unsigned short reg, unsigned short *data)
34 unsigned short reg, unsigned short *data, size_t len)
35{
36 struct spi_device *spi = to_spi_device(chip->dev);
37 struct spi_message message;
38 struct spi_transfer xfer[2];
35{
36 struct spi_device *spi = to_spi_device(chip->dev);
37 struct spi_message message;
38 struct spi_transfer xfer[2];
39 int i;
39 int error;
40
41 spi_message_init(&message);
42 memset(xfer, 0, sizeof(xfer));
43
44 chip->xfer_buf[0] = cpu_to_be16(AD714x_SPI_CMD_PREFIX |
45 AD714x_SPI_READ | reg);
46 xfer[0].tx_buf = &chip->xfer_buf[0];
47 xfer[0].len = sizeof(chip->xfer_buf[0]);
48 spi_message_add_tail(&xfer[0], &message);
49
50 xfer[1].rx_buf = &chip->xfer_buf[1];
40 int error;
41
42 spi_message_init(&message);
43 memset(xfer, 0, sizeof(xfer));
44
45 chip->xfer_buf[0] = cpu_to_be16(AD714x_SPI_CMD_PREFIX |
46 AD714x_SPI_READ | reg);
47 xfer[0].tx_buf = &chip->xfer_buf[0];
48 xfer[0].len = sizeof(chip->xfer_buf[0]);
49 spi_message_add_tail(&xfer[0], &message);
50
51 xfer[1].rx_buf = &chip->xfer_buf[1];
51 xfer[1].len = sizeof(chip->xfer_buf[1]);
52 xfer[1].len = sizeof(chip->xfer_buf[1]) * len;
52 spi_message_add_tail(&xfer[1], &message);
53
54 error = spi_sync(spi, &message);
55 if (unlikely(error)) {
56 dev_err(chip->dev, "SPI read error: %d\n", error);
57 return error;
58 }
59
53 spi_message_add_tail(&xfer[1], &message);
54
55 error = spi_sync(spi, &message);
56 if (unlikely(error)) {
57 dev_err(chip->dev, "SPI read error: %d\n", error);
58 return error;
59 }
60
60 *data = be16_to_cpu(chip->xfer_buf[1]);
61 for (i = 0; i < len; i++)
62 data[i] = be16_to_cpu(chip->xfer_buf[i + 1]);
63
61 return 0;
62}
63
64static int ad714x_spi_write(struct ad714x_chip *chip,
65 unsigned short reg, unsigned short data)
66{
67 struct spi_device *spi = to_spi_device(chip->dev);
68 int error;

--- 69 unchanged lines hidden --- 		64 return 0;
65}
66
67static int ad714x_spi_write(struct ad714x_chip *chip,
68 unsigned short reg, unsigned short data)
69{
70 struct spi_device *spi = to_spi_device(chip->dev);
71 int error;

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