Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (C) 2021 |
| 4 | * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com> |
| 5 | */ |
| 6 | |
| 7 | #include <linux/delay.h> |
| 8 | #include <linux/gpio/consumer.h> |
| 9 | #include <linux/i2c.h> |
| 10 | #include <linux/interrupt.h> |
| 11 | #include <linux/input.h> |
| 12 | #include <linux/input/mt.h> |
| 13 | #include <linux/input/touchscreen.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/regulator/consumer.h> |
| 16 | #include <linux/regmap.h> |
| 17 | |
| 18 | #include <asm/unaligned.h> |
| 19 | |
| 20 | #define HY46XX_CHKSUM_CODE 0x1 |
| 21 | #define HY46XX_FINGER_NUM 0x2 |
| 22 | #define HY46XX_CHKSUM_LEN 0x7 |
| 23 | #define HY46XX_THRESHOLD 0x80 |
| 24 | #define HY46XX_GLOVE_EN 0x84 |
| 25 | #define HY46XX_REPORT_SPEED 0x88 |
| 26 | #define HY46XX_PWR_NOISE_EN 0x89 |
| 27 | #define HY46XX_FILTER_DATA 0x8A |
| 28 | #define HY46XX_GAIN 0x92 |
| 29 | #define HY46XX_EDGE_OFFSET 0x93 |
| 30 | #define HY46XX_RX_NR_USED 0x94 |
| 31 | #define HY46XX_TX_NR_USED 0x95 |
| 32 | #define HY46XX_PWR_MODE 0xA5 |
| 33 | #define HY46XX_FW_VERSION 0xA6 |
| 34 | #define HY46XX_LIB_VERSION 0xA7 |
| 35 | #define HY46XX_TP_INFO 0xA8 |
| 36 | #define HY46XX_TP_CHIP_ID 0xA9 |
| 37 | #define HY46XX_BOOT_VER 0xB0 |
| 38 | |
| 39 | #define HY46XX_TPLEN 0x6 |
| 40 | #define HY46XX_REPORT_PKT_LEN 0x44 |
| 41 | |
| 42 | #define HY46XX_MAX_SUPPORTED_POINTS 11 |
| 43 | |
| 44 | #define TOUCH_EVENT_DOWN 0x00 |
| 45 | #define TOUCH_EVENT_UP 0x01 |
| 46 | #define TOUCH_EVENT_CONTACT 0x02 |
| 47 | #define TOUCH_EVENT_RESERVED 0x03 |
| 48 | |
| 49 | struct hycon_hy46xx_data { |
| 50 | struct i2c_client *client; |
| 51 | struct input_dev *input; |
| 52 | struct touchscreen_properties prop; |
| 53 | struct regulator *vcc; |
| 54 | |
| 55 | struct gpio_desc *reset_gpio; |
| 56 | |
| 57 | struct mutex mutex; |
| 58 | struct regmap *regmap; |
| 59 | |
| 60 | int threshold; |
| 61 | bool glove_enable; |
| 62 | int report_speed; |
| 63 | bool noise_filter_enable; |
| 64 | int filter_data; |
| 65 | int gain; |
| 66 | int edge_offset; |
| 67 | int rx_number_used; |
| 68 | int tx_number_used; |
| 69 | int power_mode; |
| 70 | int fw_version; |
| 71 | int lib_version; |
| 72 | int tp_information; |
| 73 | int tp_chip_id; |
| 74 | int bootloader_version; |
| 75 | }; |
| 76 | |
| 77 | static const struct regmap_config hycon_hy46xx_i2c_regmap_config = { |
| 78 | .reg_bits = 8, |
| 79 | .val_bits = 8, |
| 80 | }; |
| 81 | |
| 82 | static bool hycon_hy46xx_check_checksum(struct hycon_hy46xx_data *tsdata, u8 *buf) |
| 83 | { |
| 84 | u8 chksum = 0; |
| 85 | int i; |
| 86 | |
| 87 | for (i = 2; i < buf[HY46XX_CHKSUM_LEN]; i++) |
| 88 | chksum += buf[i]; |
| 89 | |
| 90 | if (chksum == buf[HY46XX_CHKSUM_CODE]) |
| 91 | return true; |
| 92 | |
| 93 | dev_err_ratelimited(&tsdata->client->dev, |
| 94 | "checksum error: 0x%02x expected, got 0x%02x\n", |
| 95 | chksum, buf[HY46XX_CHKSUM_CODE]); |
| 96 | |
| 97 | return false; |
| 98 | } |
| 99 | |
| 100 | static irqreturn_t hycon_hy46xx_isr(int irq, void *dev_id) |
| 101 | { |
| 102 | struct hycon_hy46xx_data *tsdata = dev_id; |
| 103 | struct device *dev = &tsdata->client->dev; |
| 104 | u8 rdbuf[HY46XX_REPORT_PKT_LEN]; |
| 105 | int i, x, y, id; |
| 106 | int error; |
| 107 | |
| 108 | memset(rdbuf, 0, sizeof(rdbuf)); |
| 109 | |
| 110 | error = regmap_bulk_read(tsdata->regmap, 0, rdbuf, sizeof(rdbuf)); |
| 111 | if (error) { |
| 112 | dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", |
| 113 | error); |
| 114 | goto out; |
| 115 | } |
| 116 | |
| 117 | if (!hycon_hy46xx_check_checksum(tsdata, rdbuf)) |
| 118 | goto out; |
| 119 | |
| 120 | for (i = 0; i < HY46XX_MAX_SUPPORTED_POINTS; i++) { |
| 121 | u8 *buf = &rdbuf[3 + (HY46XX_TPLEN * i)]; |
| 122 | int type = buf[0] >> 6; |
| 123 | |
| 124 | if (type == TOUCH_EVENT_RESERVED) |
| 125 | continue; |
| 126 | |
| 127 | x = get_unaligned_be16(buf) & 0x0fff; |
| 128 | y = get_unaligned_be16(buf + 2) & 0x0fff; |
| 129 | |
| 130 | id = buf[2] >> 4; |
| 131 | |
| 132 | input_mt_slot(tsdata->input, id); |
| 133 | if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, |
| 134 | type != TOUCH_EVENT_UP)) |
| 135 | touchscreen_report_pos(tsdata->input, &tsdata->prop, |
| 136 | x, y, true); |
| 137 | } |
| 138 | |
| 139 | input_mt_report_pointer_emulation(tsdata->input, false); |
| 140 | input_sync(tsdata->input); |
| 141 | |
| 142 | out: |
| 143 | return IRQ_HANDLED; |
| 144 | } |
| 145 | |
| 146 | struct hycon_hy46xx_attribute { |
| 147 | struct device_attribute dattr; |
| 148 | size_t field_offset; |
| 149 | u8 address; |
| 150 | u8 limit_low; |
| 151 | u8 limit_high; |
| 152 | }; |
| 153 | |
| 154 | #define HYCON_ATTR_U8(_field, _mode, _address, _limit_low, _limit_high) \ |
| 155 | struct hycon_hy46xx_attribute hycon_hy46xx_attr_##_field = { \ |
| 156 | .dattr = __ATTR(_field, _mode, \ |
| 157 | hycon_hy46xx_setting_show, \ |
| 158 | hycon_hy46xx_setting_store), \ |
| 159 | .field_offset = offsetof(struct hycon_hy46xx_data, _field), \ |
| 160 | .address = _address, \ |
| 161 | .limit_low = _limit_low, \ |
| 162 | .limit_high = _limit_high, \ |
| 163 | } |
| 164 | |
| 165 | #define HYCON_ATTR_BOOL(_field, _mode, _address) \ |
| 166 | struct hycon_hy46xx_attribute hycon_hy46xx_attr_##_field = { \ |
| 167 | .dattr = __ATTR(_field, _mode, \ |
| 168 | hycon_hy46xx_setting_show, \ |
| 169 | hycon_hy46xx_setting_store), \ |
| 170 | .field_offset = offsetof(struct hycon_hy46xx_data, _field), \ |
| 171 | .address = _address, \ |
| 172 | .limit_low = false, \ |
| 173 | .limit_high = true, \ |
| 174 | } |
| 175 | |
| 176 | static ssize_t hycon_hy46xx_setting_show(struct device *dev, |
| 177 | struct device_attribute *dattr, char *buf) |
| 178 | { |
| 179 | struct i2c_client *client = to_i2c_client(dev); |
| 180 | struct hycon_hy46xx_data *tsdata = i2c_get_clientdata(client); |
| 181 | struct hycon_hy46xx_attribute *attr = |
| 182 | container_of(dattr, struct hycon_hy46xx_attribute, dattr); |
| 183 | u8 *field = (u8 *)tsdata + attr->field_offset; |
| 184 | size_t count = 0; |
| 185 | int error = 0; |
| 186 | int val; |
| 187 | |
| 188 | mutex_lock(&tsdata->mutex); |
| 189 | |
| 190 | error = regmap_read(tsdata->regmap, attr->address, &val); |
| 191 | if (error < 0) { |
| 192 | dev_err(&tsdata->client->dev, |
| 193 | "Failed to fetch attribute %s, error %d\n", |
| 194 | dattr->attr.name, error); |
| 195 | goto out; |
| 196 | } |
| 197 | |
| 198 | if (val != *field) { |
| 199 | dev_warn(&tsdata->client->dev, |
| 200 | "%s: read (%d) and stored value (%d) differ\n", |
| 201 | dattr->attr.name, val, *field); |
| 202 | *field = val; |
| 203 | } |
| 204 | |
ye xingchen | e50389f | 2023-12-12 21:53:40 -0800 | [diff] [blame] | 205 | count = sysfs_emit(buf, "%d\n", val); |
Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 206 | |
| 207 | out: |
| 208 | mutex_unlock(&tsdata->mutex); |
| 209 | return error ?: count; |
| 210 | } |
| 211 | |
| 212 | static ssize_t hycon_hy46xx_setting_store(struct device *dev, |
| 213 | struct device_attribute *dattr, |
| 214 | const char *buf, size_t count) |
| 215 | { |
| 216 | struct i2c_client *client = to_i2c_client(dev); |
| 217 | struct hycon_hy46xx_data *tsdata = i2c_get_clientdata(client); |
| 218 | struct hycon_hy46xx_attribute *attr = |
| 219 | container_of(dattr, struct hycon_hy46xx_attribute, dattr); |
| 220 | u8 *field = (u8 *)tsdata + attr->field_offset; |
| 221 | unsigned int val; |
| 222 | int error; |
| 223 | |
| 224 | mutex_lock(&tsdata->mutex); |
| 225 | |
| 226 | error = kstrtouint(buf, 0, &val); |
| 227 | if (error) |
| 228 | goto out; |
| 229 | |
| 230 | if (val < attr->limit_low || val > attr->limit_high) { |
| 231 | error = -ERANGE; |
| 232 | goto out; |
| 233 | } |
| 234 | |
| 235 | error = regmap_write(tsdata->regmap, attr->address, val); |
| 236 | if (error < 0) { |
| 237 | dev_err(&tsdata->client->dev, |
| 238 | "Failed to update attribute %s, error: %d\n", |
| 239 | dattr->attr.name, error); |
| 240 | goto out; |
| 241 | } |
| 242 | *field = val; |
| 243 | |
| 244 | out: |
| 245 | mutex_unlock(&tsdata->mutex); |
| 246 | return error ?: count; |
| 247 | } |
| 248 | |
| 249 | static HYCON_ATTR_U8(threshold, 0644, HY46XX_THRESHOLD, 0, 255); |
| 250 | static HYCON_ATTR_BOOL(glove_enable, 0644, HY46XX_GLOVE_EN); |
| 251 | static HYCON_ATTR_U8(report_speed, 0644, HY46XX_REPORT_SPEED, 0, 255); |
| 252 | static HYCON_ATTR_BOOL(noise_filter_enable, 0644, HY46XX_PWR_NOISE_EN); |
| 253 | static HYCON_ATTR_U8(filter_data, 0644, HY46XX_FILTER_DATA, 0, 5); |
| 254 | static HYCON_ATTR_U8(gain, 0644, HY46XX_GAIN, 0, 5); |
| 255 | static HYCON_ATTR_U8(edge_offset, 0644, HY46XX_EDGE_OFFSET, 0, 5); |
| 256 | static HYCON_ATTR_U8(fw_version, 0444, HY46XX_FW_VERSION, 0, 255); |
| 257 | static HYCON_ATTR_U8(lib_version, 0444, HY46XX_LIB_VERSION, 0, 255); |
| 258 | static HYCON_ATTR_U8(tp_information, 0444, HY46XX_TP_INFO, 0, 255); |
| 259 | static HYCON_ATTR_U8(tp_chip_id, 0444, HY46XX_TP_CHIP_ID, 0, 255); |
| 260 | static HYCON_ATTR_U8(bootloader_version, 0444, HY46XX_BOOT_VER, 0, 255); |
| 261 | |
| 262 | static struct attribute *hycon_hy46xx_attrs[] = { |
| 263 | &hycon_hy46xx_attr_threshold.dattr.attr, |
| 264 | &hycon_hy46xx_attr_glove_enable.dattr.attr, |
| 265 | &hycon_hy46xx_attr_report_speed.dattr.attr, |
| 266 | &hycon_hy46xx_attr_noise_filter_enable.dattr.attr, |
| 267 | &hycon_hy46xx_attr_filter_data.dattr.attr, |
| 268 | &hycon_hy46xx_attr_gain.dattr.attr, |
| 269 | &hycon_hy46xx_attr_edge_offset.dattr.attr, |
| 270 | &hycon_hy46xx_attr_fw_version.dattr.attr, |
| 271 | &hycon_hy46xx_attr_lib_version.dattr.attr, |
| 272 | &hycon_hy46xx_attr_tp_information.dattr.attr, |
| 273 | &hycon_hy46xx_attr_tp_chip_id.dattr.attr, |
| 274 | &hycon_hy46xx_attr_bootloader_version.dattr.attr, |
| 275 | NULL |
| 276 | }; |
Dmitry Torokhov | d9d538c | 2023-07-28 17:51:21 -0700 | [diff] [blame] | 277 | ATTRIBUTE_GROUPS(hycon_hy46xx); |
Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 278 | |
| 279 | static void hycon_hy46xx_get_defaults(struct device *dev, struct hycon_hy46xx_data *tsdata) |
| 280 | { |
| 281 | bool val_bool; |
| 282 | int error; |
| 283 | u32 val; |
| 284 | |
| 285 | error = device_property_read_u32(dev, "hycon,threshold", &val); |
| 286 | if (!error) { |
| 287 | error = regmap_write(tsdata->regmap, HY46XX_THRESHOLD, val); |
| 288 | if (error < 0) |
| 289 | goto out; |
| 290 | |
| 291 | tsdata->threshold = val; |
| 292 | } |
| 293 | |
| 294 | val_bool = device_property_read_bool(dev, "hycon,glove-enable"); |
| 295 | error = regmap_write(tsdata->regmap, HY46XX_GLOVE_EN, val_bool); |
| 296 | if (error < 0) |
| 297 | goto out; |
| 298 | tsdata->glove_enable = val_bool; |
| 299 | |
| 300 | error = device_property_read_u32(dev, "hycon,report-speed-hz", &val); |
| 301 | if (!error) { |
| 302 | error = regmap_write(tsdata->regmap, HY46XX_REPORT_SPEED, val); |
| 303 | if (error < 0) |
| 304 | goto out; |
| 305 | |
| 306 | tsdata->report_speed = val; |
| 307 | } |
| 308 | |
| 309 | val_bool = device_property_read_bool(dev, "hycon,noise-filter-enable"); |
| 310 | error = regmap_write(tsdata->regmap, HY46XX_PWR_NOISE_EN, val_bool); |
| 311 | if (error < 0) |
| 312 | goto out; |
| 313 | tsdata->noise_filter_enable = val_bool; |
| 314 | |
| 315 | error = device_property_read_u32(dev, "hycon,filter-data", &val); |
| 316 | if (!error) { |
| 317 | error = regmap_write(tsdata->regmap, HY46XX_FILTER_DATA, val); |
| 318 | if (error < 0) |
| 319 | goto out; |
| 320 | |
| 321 | tsdata->filter_data = val; |
| 322 | } |
| 323 | |
| 324 | error = device_property_read_u32(dev, "hycon,gain", &val); |
| 325 | if (!error) { |
| 326 | error = regmap_write(tsdata->regmap, HY46XX_GAIN, val); |
| 327 | if (error < 0) |
| 328 | goto out; |
| 329 | |
| 330 | tsdata->gain = val; |
| 331 | } |
| 332 | |
| 333 | error = device_property_read_u32(dev, "hycon,edge-offset", &val); |
| 334 | if (!error) { |
| 335 | error = regmap_write(tsdata->regmap, HY46XX_EDGE_OFFSET, val); |
| 336 | if (error < 0) |
| 337 | goto out; |
| 338 | |
| 339 | tsdata->edge_offset = val; |
| 340 | } |
| 341 | |
| 342 | return; |
| 343 | out: |
| 344 | dev_err(&tsdata->client->dev, "Failed to set default settings"); |
| 345 | } |
| 346 | |
| 347 | static void hycon_hy46xx_get_parameters(struct hycon_hy46xx_data *tsdata) |
| 348 | { |
| 349 | int error; |
| 350 | u32 val; |
| 351 | |
| 352 | error = regmap_read(tsdata->regmap, HY46XX_THRESHOLD, &val); |
| 353 | if (error < 0) |
| 354 | goto out; |
| 355 | tsdata->threshold = val; |
| 356 | |
| 357 | error = regmap_read(tsdata->regmap, HY46XX_GLOVE_EN, &val); |
| 358 | if (error < 0) |
| 359 | goto out; |
| 360 | tsdata->glove_enable = val; |
| 361 | |
| 362 | error = regmap_read(tsdata->regmap, HY46XX_REPORT_SPEED, &val); |
| 363 | if (error < 0) |
| 364 | goto out; |
| 365 | tsdata->report_speed = val; |
| 366 | |
| 367 | error = regmap_read(tsdata->regmap, HY46XX_PWR_NOISE_EN, &val); |
| 368 | if (error < 0) |
| 369 | goto out; |
| 370 | tsdata->noise_filter_enable = val; |
| 371 | |
| 372 | error = regmap_read(tsdata->regmap, HY46XX_FILTER_DATA, &val); |
| 373 | if (error < 0) |
| 374 | goto out; |
| 375 | tsdata->filter_data = val; |
| 376 | |
| 377 | error = regmap_read(tsdata->regmap, HY46XX_GAIN, &val); |
| 378 | if (error < 0) |
| 379 | goto out; |
| 380 | tsdata->gain = val; |
| 381 | |
| 382 | error = regmap_read(tsdata->regmap, HY46XX_EDGE_OFFSET, &val); |
| 383 | if (error < 0) |
| 384 | goto out; |
| 385 | tsdata->edge_offset = val; |
| 386 | |
| 387 | error = regmap_read(tsdata->regmap, HY46XX_RX_NR_USED, &val); |
| 388 | if (error < 0) |
| 389 | goto out; |
| 390 | tsdata->rx_number_used = val; |
| 391 | |
| 392 | error = regmap_read(tsdata->regmap, HY46XX_TX_NR_USED, &val); |
| 393 | if (error < 0) |
| 394 | goto out; |
| 395 | tsdata->tx_number_used = val; |
| 396 | |
| 397 | error = regmap_read(tsdata->regmap, HY46XX_PWR_MODE, &val); |
| 398 | if (error < 0) |
| 399 | goto out; |
| 400 | tsdata->power_mode = val; |
| 401 | |
| 402 | error = regmap_read(tsdata->regmap, HY46XX_FW_VERSION, &val); |
| 403 | if (error < 0) |
| 404 | goto out; |
| 405 | tsdata->fw_version = val; |
| 406 | |
| 407 | error = regmap_read(tsdata->regmap, HY46XX_LIB_VERSION, &val); |
| 408 | if (error < 0) |
| 409 | goto out; |
| 410 | tsdata->lib_version = val; |
| 411 | |
| 412 | error = regmap_read(tsdata->regmap, HY46XX_TP_INFO, &val); |
| 413 | if (error < 0) |
| 414 | goto out; |
| 415 | tsdata->tp_information = val; |
| 416 | |
| 417 | error = regmap_read(tsdata->regmap, HY46XX_TP_CHIP_ID, &val); |
| 418 | if (error < 0) |
| 419 | goto out; |
| 420 | tsdata->tp_chip_id = val; |
| 421 | |
| 422 | error = regmap_read(tsdata->regmap, HY46XX_BOOT_VER, &val); |
| 423 | if (error < 0) |
| 424 | goto out; |
| 425 | tsdata->bootloader_version = val; |
| 426 | |
| 427 | return; |
| 428 | out: |
| 429 | dev_err(&tsdata->client->dev, "Failed to read default settings"); |
| 430 | } |
| 431 | |
| 432 | static void hycon_hy46xx_disable_regulator(void *arg) |
| 433 | { |
| 434 | struct hycon_hy46xx_data *data = arg; |
| 435 | |
| 436 | regulator_disable(data->vcc); |
| 437 | } |
| 438 | |
Uwe Kleine-König | cb812d3 | 2022-11-18 23:39:38 +0100 | [diff] [blame] | 439 | static int hycon_hy46xx_probe(struct i2c_client *client) |
Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 440 | { |
| 441 | struct hycon_hy46xx_data *tsdata; |
| 442 | struct input_dev *input; |
| 443 | int error; |
| 444 | |
| 445 | dev_dbg(&client->dev, "probing for HYCON HY46XX I2C\n"); |
| 446 | |
| 447 | tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); |
| 448 | if (!tsdata) |
| 449 | return -ENOMEM; |
| 450 | |
| 451 | tsdata->vcc = devm_regulator_get(&client->dev, "vcc"); |
| 452 | if (IS_ERR(tsdata->vcc)) { |
| 453 | error = PTR_ERR(tsdata->vcc); |
| 454 | if (error != -EPROBE_DEFER) |
| 455 | dev_err(&client->dev, |
| 456 | "failed to request regulator: %d\n", error); |
| 457 | return error; |
| 458 | } |
| 459 | |
| 460 | error = regulator_enable(tsdata->vcc); |
| 461 | if (error < 0) { |
| 462 | dev_err(&client->dev, "failed to enable vcc: %d\n", error); |
| 463 | return error; |
| 464 | } |
| 465 | |
| 466 | error = devm_add_action_or_reset(&client->dev, |
| 467 | hycon_hy46xx_disable_regulator, |
| 468 | tsdata); |
| 469 | if (error) |
| 470 | return error; |
| 471 | |
| 472 | tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, |
| 473 | "reset", GPIOD_OUT_LOW); |
| 474 | if (IS_ERR(tsdata->reset_gpio)) { |
| 475 | error = PTR_ERR(tsdata->reset_gpio); |
| 476 | dev_err(&client->dev, |
| 477 | "Failed to request GPIO reset pin, error %d\n", error); |
| 478 | return error; |
| 479 | } |
| 480 | |
| 481 | if (tsdata->reset_gpio) { |
| 482 | usleep_range(5000, 6000); |
| 483 | gpiod_set_value_cansleep(tsdata->reset_gpio, 1); |
| 484 | usleep_range(5000, 6000); |
| 485 | gpiod_set_value_cansleep(tsdata->reset_gpio, 0); |
| 486 | msleep(1000); |
| 487 | } |
| 488 | |
| 489 | input = devm_input_allocate_device(&client->dev); |
| 490 | if (!input) { |
| 491 | dev_err(&client->dev, "failed to allocate input device.\n"); |
| 492 | return -ENOMEM; |
| 493 | } |
| 494 | |
| 495 | mutex_init(&tsdata->mutex); |
| 496 | tsdata->client = client; |
| 497 | tsdata->input = input; |
| 498 | |
| 499 | tsdata->regmap = devm_regmap_init_i2c(client, |
| 500 | &hycon_hy46xx_i2c_regmap_config); |
| 501 | if (IS_ERR(tsdata->regmap)) { |
| 502 | dev_err(&client->dev, "regmap allocation failed\n"); |
| 503 | return PTR_ERR(tsdata->regmap); |
| 504 | } |
| 505 | |
| 506 | hycon_hy46xx_get_defaults(&client->dev, tsdata); |
| 507 | hycon_hy46xx_get_parameters(tsdata); |
| 508 | |
| 509 | input->name = "Hycon Capacitive Touch"; |
| 510 | input->id.bustype = BUS_I2C; |
| 511 | input->dev.parent = &client->dev; |
| 512 | |
| 513 | input_set_abs_params(input, ABS_MT_POSITION_X, 0, -1, 0, 0); |
| 514 | input_set_abs_params(input, ABS_MT_POSITION_Y, 0, -1, 0, 0); |
| 515 | |
| 516 | touchscreen_parse_properties(input, true, &tsdata->prop); |
| 517 | |
| 518 | error = input_mt_init_slots(input, HY46XX_MAX_SUPPORTED_POINTS, |
| 519 | INPUT_MT_DIRECT); |
| 520 | if (error) { |
| 521 | dev_err(&client->dev, "Unable to init MT slots.\n"); |
| 522 | return error; |
| 523 | } |
| 524 | |
| 525 | i2c_set_clientdata(client, tsdata); |
| 526 | |
| 527 | error = devm_request_threaded_irq(&client->dev, client->irq, |
| 528 | NULL, hycon_hy46xx_isr, IRQF_ONESHOT, |
| 529 | client->name, tsdata); |
| 530 | if (error) { |
| 531 | dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); |
| 532 | return error; |
| 533 | } |
| 534 | |
Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 535 | error = input_register_device(input); |
| 536 | if (error) |
| 537 | return error; |
| 538 | |
| 539 | dev_dbg(&client->dev, |
| 540 | "HYCON HY46XX initialized: IRQ %d, Reset pin %d.\n", |
| 541 | client->irq, |
| 542 | tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); |
| 543 | |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | static const struct i2c_device_id hycon_hy46xx_id[] = { |
| 548 | { .name = "hy4613" }, |
| 549 | { .name = "hy4614" }, |
| 550 | { .name = "hy4621" }, |
| 551 | { .name = "hy4623" }, |
| 552 | { .name = "hy4633" }, |
| 553 | { .name = "hy4635" }, |
| 554 | { /* sentinel */ } |
| 555 | }; |
| 556 | MODULE_DEVICE_TABLE(i2c, hycon_hy46xx_id); |
| 557 | |
| 558 | static const struct of_device_id hycon_hy46xx_of_match[] = { |
| 559 | { .compatible = "hycon,hy4613" }, |
| 560 | { .compatible = "hycon,hy4614" }, |
| 561 | { .compatible = "hycon,hy4621" }, |
| 562 | { .compatible = "hycon,hy4623" }, |
| 563 | { .compatible = "hycon,hy4633" }, |
| 564 | { .compatible = "hycon,hy4635" }, |
| 565 | { /* sentinel */ } |
| 566 | }; |
| 567 | MODULE_DEVICE_TABLE(of, hycon_hy46xx_of_match); |
| 568 | |
| 569 | static struct i2c_driver hycon_hy46xx_driver = { |
| 570 | .driver = { |
| 571 | .name = "hycon_hy46xx", |
Dmitry Torokhov | d9d538c | 2023-07-28 17:51:21 -0700 | [diff] [blame] | 572 | .dev_groups = hycon_hy46xx_groups, |
Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 573 | .of_match_table = hycon_hy46xx_of_match, |
| 574 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
| 575 | }, |
| 576 | .id_table = hycon_hy46xx_id, |
Uwe Kleine-König | d8bde56 | 2023-05-17 09:55:42 -0700 | [diff] [blame] | 577 | .probe = hycon_hy46xx_probe, |
Giulio Benetti | aa2f62c | 2021-04-13 18:46:53 -0700 | [diff] [blame] | 578 | }; |
| 579 | |
| 580 | module_i2c_driver(hycon_hy46xx_driver); |
| 581 | |
| 582 | MODULE_AUTHOR("Giulio Benetti <giulio.benetti@benettiengineering.com>"); |
| 583 | MODULE_DESCRIPTION("HYCON HY46XX I2C Touchscreen Driver"); |
| 584 | MODULE_LICENSE("GPL v2"); |