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| 2 | |
| 3 | * TSC2005 touchscreen driver
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| 4 | *
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| 5 | * Copyright (C) 2006-2010 Nokia Corporation
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| 6 | * Copyright (C) 2015 QWERTY Embedded Design
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| 7 | * Copyright (C) 2015 EMAC Inc.
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| 8 | *
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| 9 | * Based on original tsc2005.c by Lauri Leukkunen <[email protected]>
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| 10 |
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| 11 |
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| 12 | #include <linux/input.h>
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| 13 | #include <linux/module.h>
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| 14 | #include <linux/of.h>
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| 15 | #include <linux/spi/spi.h>
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| 16 | #include <linux/regmap.h>
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| 17 | #include "tsc200x-core.h"
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| 18 |
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| 19 | static const struct input_id tsc2005_input_id = {
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| 20 | .bustype = BUS_SPI,
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| 21 | .product = 2005,
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| 22 | };
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| 23 |
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| 24 | static int tsc2005_cmd(struct device *dev, u8 cmd)
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| 25 | {
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| 26 | u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
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| 27 | struct spi_transfer xfer = {
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| 28 | .tx_buf = &tx,
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| 29 | .len = 1,
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| 30 | .bits_per_word = 8,
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| 31 | };
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| 32 | struct spi_message msg;
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| 33 | struct spi_device *spi = to_spi_device(dev);
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| 34 | int error;
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| 35 |
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| 36 | spi_message_init(&msg);
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| 37 | spi_message_add_tail(&xfer, &msg);
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| 38 |
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| 39 | error = spi_sync(spi, &msg);
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| 40 | if (error) {
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| 41 | dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
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| 42 | __func__, cmd, error);
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| 43 | return error;
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| 44 | }
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| 45 |
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| 46 | return 0;
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| 47 | }
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| 48 |
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| 49 | static int tsc2005_probe(struct spi_device *spi)
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| 50 | {
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| 51 | int error;
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| 52 |
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| 53 | spi->mode = SPI_MODE_0;
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| 54 | spi->bits_per_word = 8;
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| 55 | if (!spi->max_speed_hz)
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| 56 | spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
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| 57 |
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| 58 | error = spi_setup(spi);
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| 59 | if (error)
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| 60 | return error;
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| 61 |
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| 62 | return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
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| 63 | devm_regmap_init_spi(spi, &tsc200x_regmap_config),
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| 64 | tsc2005_cmd);
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| 65 | }
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| 66 |
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| 67 | #ifdef CONFIG_OF
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| 68 | static const struct of_device_id tsc2005_of_match[] = {
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| 69 | { .compatible = "ti,tsc2005" },
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| 70 | { }
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| 71 | };
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| 72 | MODULE_DEVICE_TABLE(of, tsc2005_of_match);
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| 73 | #endif
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| 74 |
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| 75 | static struct spi_driver tsc2005_driver = {
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| 76 | .driver = {
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| 77 | .name = "tsc2005",
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| 78 | .dev_groups = tsc200x_groups,
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| 79 | .of_match_table = of_match_ptr(tsc2005_of_match),
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| 80 | .pm = pm_sleep_ptr(&tsc200x_pm_ops),
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| 81 | },
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| 82 | .probe = tsc2005_probe,
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| 83 | };
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| 84 | module_spi_driver(tsc2005_driver);
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| 85 |
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| 86 | MODULE_AUTHOR("Michael Welling <[email protected]>");
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| 87 | MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
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| 88 | MODULE_LICENSE("GPL");
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| 89 | MODULE_ALIAS("spi:tsc2005");
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