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(map: tsdata->regmap, reg: 0, val: rdbuf, val_count: 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, buf: 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(p: buf) & 0x0fff; |
128 | y = get_unaligned_be16(p: buf + 2) & 0x0fff; |
129 | |
130 | id = buf[2] >> 4; |
131 | |
132 | input_mt_slot(dev: tsdata->input, slot: id); |
133 | if (input_mt_report_slot_state(dev: tsdata->input, MT_TOOL_FINGER, |
134 | active: type != TOUCH_EVENT_UP)) |
135 | touchscreen_report_pos(input: tsdata->input, prop: &tsdata->prop, |
136 | x, y, multitouch: true); |
137 | } |
138 | |
139 | input_mt_report_pointer_emulation(dev: tsdata->input, use_count: false); |
140 | input_sync(dev: 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(map: tsdata->regmap, reg: attr->address, val: &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 | |
205 | count = sysfs_emit(buf, fmt: "%d\n" , val); |
206 | |
207 | out: |
208 | mutex_unlock(lock: &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(s: buf, base: 0, res: &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(map: tsdata->regmap, reg: 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(lock: &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 | }; |
277 | ATTRIBUTE_GROUPS(hycon_hy46xx); |
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, propname: "hycon,threshold" , val: &val); |
286 | if (!error) { |
287 | error = regmap_write(map: 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, propname: "hycon,glove-enable" ); |
295 | error = regmap_write(map: tsdata->regmap, HY46XX_GLOVE_EN, val: val_bool); |
296 | if (error < 0) |
297 | goto out; |
298 | tsdata->glove_enable = val_bool; |
299 | |
300 | error = device_property_read_u32(dev, propname: "hycon,report-speed-hz" , val: &val); |
301 | if (!error) { |
302 | error = regmap_write(map: 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, propname: "hycon,noise-filter-enable" ); |
310 | error = regmap_write(map: tsdata->regmap, HY46XX_PWR_NOISE_EN, val: val_bool); |
311 | if (error < 0) |
312 | goto out; |
313 | tsdata->noise_filter_enable = val_bool; |
314 | |
315 | error = device_property_read_u32(dev, propname: "hycon,filter-data" , val: &val); |
316 | if (!error) { |
317 | error = regmap_write(map: 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, propname: "hycon,gain" , val: &val); |
325 | if (!error) { |
326 | error = regmap_write(map: 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, propname: "hycon,edge-offset" , val: &val); |
334 | if (!error) { |
335 | error = regmap_write(map: 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(map: tsdata->regmap, HY46XX_THRESHOLD, val: &val); |
353 | if (error < 0) |
354 | goto out; |
355 | tsdata->threshold = val; |
356 | |
357 | error = regmap_read(map: tsdata->regmap, HY46XX_GLOVE_EN, val: &val); |
358 | if (error < 0) |
359 | goto out; |
360 | tsdata->glove_enable = val; |
361 | |
362 | error = regmap_read(map: tsdata->regmap, HY46XX_REPORT_SPEED, val: &val); |
363 | if (error < 0) |
364 | goto out; |
365 | tsdata->report_speed = val; |
366 | |
367 | error = regmap_read(map: tsdata->regmap, HY46XX_PWR_NOISE_EN, val: &val); |
368 | if (error < 0) |
369 | goto out; |
370 | tsdata->noise_filter_enable = val; |
371 | |
372 | error = regmap_read(map: tsdata->regmap, HY46XX_FILTER_DATA, val: &val); |
373 | if (error < 0) |
374 | goto out; |
375 | tsdata->filter_data = val; |
376 | |
377 | error = regmap_read(map: tsdata->regmap, HY46XX_GAIN, val: &val); |
378 | if (error < 0) |
379 | goto out; |
380 | tsdata->gain = val; |
381 | |
382 | error = regmap_read(map: tsdata->regmap, HY46XX_EDGE_OFFSET, val: &val); |
383 | if (error < 0) |
384 | goto out; |
385 | tsdata->edge_offset = val; |
386 | |
387 | error = regmap_read(map: tsdata->regmap, HY46XX_RX_NR_USED, val: &val); |
388 | if (error < 0) |
389 | goto out; |
390 | tsdata->rx_number_used = val; |
391 | |
392 | error = regmap_read(map: tsdata->regmap, HY46XX_TX_NR_USED, val: &val); |
393 | if (error < 0) |
394 | goto out; |
395 | tsdata->tx_number_used = val; |
396 | |
397 | error = regmap_read(map: tsdata->regmap, HY46XX_PWR_MODE, val: &val); |
398 | if (error < 0) |
399 | goto out; |
400 | tsdata->power_mode = val; |
401 | |
402 | error = regmap_read(map: tsdata->regmap, HY46XX_FW_VERSION, val: &val); |
403 | if (error < 0) |
404 | goto out; |
405 | tsdata->fw_version = val; |
406 | |
407 | error = regmap_read(map: tsdata->regmap, HY46XX_LIB_VERSION, val: &val); |
408 | if (error < 0) |
409 | goto out; |
410 | tsdata->lib_version = val; |
411 | |
412 | error = regmap_read(map: tsdata->regmap, HY46XX_TP_INFO, val: &val); |
413 | if (error < 0) |
414 | goto out; |
415 | tsdata->tp_information = val; |
416 | |
417 | error = regmap_read(map: tsdata->regmap, HY46XX_TP_CHIP_ID, val: &val); |
418 | if (error < 0) |
419 | goto out; |
420 | tsdata->tp_chip_id = val; |
421 | |
422 | error = regmap_read(map: tsdata->regmap, HY46XX_BOOT_VER, val: &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(regulator: data->vcc); |
437 | } |
438 | |
439 | static int hycon_hy46xx_probe(struct i2c_client *client) |
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(dev: &client->dev, size: sizeof(*tsdata), GFP_KERNEL); |
448 | if (!tsdata) |
449 | return -ENOMEM; |
450 | |
451 | tsdata->vcc = devm_regulator_get(dev: &client->dev, id: "vcc" ); |
452 | if (IS_ERR(ptr: tsdata->vcc)) { |
453 | error = PTR_ERR(ptr: 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(regulator: 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(dev: &client->dev, |
473 | con_id: "reset" , flags: GPIOD_OUT_LOW); |
474 | if (IS_ERR(ptr: tsdata->reset_gpio)) { |
475 | error = PTR_ERR(ptr: 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(min: 5000, max: 6000); |
483 | gpiod_set_value_cansleep(desc: tsdata->reset_gpio, value: 1); |
484 | usleep_range(min: 5000, max: 6000); |
485 | gpiod_set_value_cansleep(desc: tsdata->reset_gpio, value: 0); |
486 | msleep(msecs: 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(ptr: tsdata->regmap)) { |
502 | dev_err(&client->dev, "regmap allocation failed\n" ); |
503 | return PTR_ERR(ptr: tsdata->regmap); |
504 | } |
505 | |
506 | hycon_hy46xx_get_defaults(dev: &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(dev: input, ABS_MT_POSITION_X, min: 0, max: -1, fuzz: 0, flat: 0); |
514 | input_set_abs_params(dev: input, ABS_MT_POSITION_Y, min: 0, max: -1, fuzz: 0, flat: 0); |
515 | |
516 | touchscreen_parse_properties(input, multitouch: true, prop: &tsdata->prop); |
517 | |
518 | error = input_mt_init_slots(dev: 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, data: tsdata); |
526 | |
527 | error = devm_request_threaded_irq(dev: &client->dev, irq: client->irq, |
528 | NULL, thread_fn: hycon_hy46xx_isr, IRQF_ONESHOT, |
529 | devname: client->name, dev_id: tsdata); |
530 | if (error) { |
531 | dev_err(&client->dev, "Unable to request touchscreen IRQ.\n" ); |
532 | return error; |
533 | } |
534 | |
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" , |
572 | .dev_groups = hycon_hy46xx_groups, |
573 | .of_match_table = hycon_hy46xx_of_match, |
574 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
575 | }, |
576 | .id_table = hycon_hy46xx_id, |
577 | .probe = hycon_hy46xx_probe, |
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" ); |
585 | |