projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 37bd4469 LL |
2 | /* |
| 3 | * TSC2005 touchscreen driver | |
| 4 | * | |
| 5 | * Copyright (C) 2006-2010 Nokia Corporation | |
| 6ac24381 MW |
6 | * Copyright (C) 2015 QWERTY Embedded Design |
| 7 | * Copyright (C) 2015 EMAC Inc. | |
| 37bd4469 | 8 | * |
| 6ac24381 | 9 | * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com> |
| 37bd4469 LL |
10 | */ |
| 11 | ||
| 37bd4469 | 12 | #include <linux/input.h> |
| 449aa83e DT |
13 | #include <linux/module.h> |
| 14 | #include <linux/of.h> | |
| 37bd4469 | 15 | #include <linux/spi/spi.h> |
| 273cf48a | 16 | #include <linux/regmap.h> |
| 6ac24381 | 17 | #include "tsc200x-core.h" |
| 37bd4469 | 18 | |
| e9003c9c MW |
19 | static const struct input_id tsc2005_input_id = { |
| 20 | .bustype = BUS_SPI, | |
| 21 | .product = 2005, | |
| 22 | }; | |
| 23 | ||
| 6ac24381 | 24 | static int tsc2005_cmd(struct device *dev, u8 cmd) |
| 37bd4469 | 25 | { |
| ef3b98c2 | 26 | u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd; |
| 9a6e180a | 27 | struct spi_transfer xfer = { |
| 6ac24381 MW |
28 | .tx_buf = &tx, |
| 29 | .len = 1, | |
| 30 | .bits_per_word = 8, | |
| 9a6e180a | 31 | }; |
| 37bd4469 | 32 | struct spi_message msg; |
| 6ac24381 | 33 | struct spi_device *spi = to_spi_device(dev); |
| 71f80045 | 34 | int error; |
| 37bd4469 LL |
35 | |
| 36 | spi_message_init(&msg); | |
| 37 | spi_message_add_tail(&xfer, &msg); | |
| 71f80045 | 38 | |
| 6ac24381 | 39 | error = spi_sync(spi, &msg); |
| 71f80045 | 40 | if (error) { |
| 6ac24381 | 41 | dev_err(dev, "%s: failed, command: %x, spi error: %d\n", |
| 71f80045 DT |
42 | __func__, cmd, error); |
| 43 | return error; | |
| 44 | } | |
| 45 | ||
| 46 | return 0; | |
| 37bd4469 LL |
47 | } |
| 48 | ||
| 5298cc4c | 49 | static int tsc2005_probe(struct spi_device *spi) |
| 37bd4469 | 50 | { |
| 99bb892d | 51 | int error; |
| 37bd4469 | 52 | |
| 99bb892d DT |
53 | spi->mode = SPI_MODE_0; |
| 54 | spi->bits_per_word = 8; | |
| 55 | if (!spi->max_speed_hz) | |
| 56 | spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ; | |
| 37bd4469 | 57 | |
| 99bb892d DT |
58 | error = spi_setup(spi); |
| 59 | if (error) | |
| 60 | return error; | |
| 37bd4469 | 61 | |
| e9003c9c | 62 | return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id, |
| 6ac24381 MW |
63 | devm_regmap_init_spi(spi, &tsc200x_regmap_config), |
| 64 | tsc2005_cmd); | |
| 37bd4469 LL |
65 | } |
| 66 | ||
| 449aa83e DT |
67 | #ifdef CONFIG_OF |
| 68 | static const struct of_device_id tsc2005_of_match[] = { | |
| 69 | { .compatible = "ti,tsc2005" }, | |
| 70 | { /* sentinel */ } | |
| 71 | }; | |
| 72 | MODULE_DEVICE_TABLE(of, tsc2005_of_match); | |
| 73 | #endif | |
| 74 | ||
| 37bd4469 | 75 | static struct spi_driver tsc2005_driver = { |
| 3ff8ff53 | 76 | .driver = { |
| 97f2bedb DT |
77 | .name = "tsc2005", |
| 78 | .dev_groups = tsc200x_groups, | |
| 79 | .of_match_table = of_match_ptr(tsc2005_of_match), | |
| 80 | .pm = pm_sleep_ptr(&tsc200x_pm_ops), | |
| 37bd4469 | 81 | }, |
| 3ff8ff53 | 82 | .probe = tsc2005_probe, |
| 37bd4469 | 83 | }; |
| ca83922e | 84 | module_spi_driver(tsc2005_driver); |
| 37bd4469 | 85 | |
| 6ac24381 | 86 | MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>"); |
| b88aa494 | 87 | MODULE_DESCRIPTION("TSC2005 Touchscreen Driver"); |
| 37bd4469 | 88 | MODULE_LICENSE("GPL"); |
| 938789fe | 89 | MODULE_ALIAS("spi:tsc2005"); |