19c92ab61SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2a485cb03SMika Penttilä /*
3a485cb03SMika Penttilä * Touch Screen driver for SiS 9200 family I2C Touch panels
4a485cb03SMika Penttilä *
5a485cb03SMika Penttilä * Copyright (C) 2015 SiS, Inc.
6a485cb03SMika Penttilä * Copyright (C) 2016 Nextfour Group
7a485cb03SMika Penttilä */
8a485cb03SMika Penttilä
9a485cb03SMika Penttilä #include <linux/crc-itu-t.h>
10a485cb03SMika Penttilä #include <linux/delay.h>
11a485cb03SMika Penttilä #include <linux/i2c.h>
12a485cb03SMika Penttilä #include <linux/input.h>
13a485cb03SMika Penttilä #include <linux/input/mt.h>
14a485cb03SMika Penttilä #include <linux/interrupt.h>
15a485cb03SMika Penttilä #include <linux/gpio/consumer.h>
16a485cb03SMika Penttilä #include <linux/module.h>
17a485cb03SMika Penttilä #include <linux/slab.h>
18a485cb03SMika Penttilä #include <asm/unaligned.h>
19a485cb03SMika Penttilä
20a485cb03SMika Penttilä #define SIS_I2C_NAME "sis_i2c_ts"
21a485cb03SMika Penttilä
22a485cb03SMika Penttilä /*
23a485cb03SMika Penttilä * The I2C packet format:
24a485cb03SMika Penttilä * le16 byte count
25a485cb03SMika Penttilä * u8 Report ID
26a485cb03SMika Penttilä * <contact data - variable length>
27a485cb03SMika Penttilä * u8 Number of contacts
28a485cb03SMika Penttilä * le16 Scan Time (optional)
29a485cb03SMika Penttilä * le16 CRC
30a485cb03SMika Penttilä *
31a485cb03SMika Penttilä * One touch point information consists of 6+ bytes, the order is:
32a485cb03SMika Penttilä * u8 contact state
33a485cb03SMika Penttilä * u8 finger id
34a485cb03SMika Penttilä * le16 x axis
35a485cb03SMika Penttilä * le16 y axis
36a485cb03SMika Penttilä * u8 contact width (optional)
37a485cb03SMika Penttilä * u8 contact height (optional)
38a485cb03SMika Penttilä * u8 pressure (optional)
39a485cb03SMika Penttilä *
40a485cb03SMika Penttilä * Maximum amount of data transmitted in one shot is 64 bytes, if controller
41a485cb03SMika Penttilä * needs to report more contacts than fit in one packet it will send true
42a485cb03SMika Penttilä * number of contacts in first packet and 0 as number of contacts in second
43a485cb03SMika Penttilä * packet.
44a485cb03SMika Penttilä */
45a485cb03SMika Penttilä
46a485cb03SMika Penttilä #define SIS_MAX_PACKET_SIZE 64
47a485cb03SMika Penttilä
48a485cb03SMika Penttilä #define SIS_PKT_LEN_OFFSET 0
49a485cb03SMika Penttilä #define SIS_PKT_REPORT_OFFSET 2 /* Report ID/type */
50a485cb03SMika Penttilä #define SIS_PKT_CONTACT_OFFSET 3 /* First contact */
51a485cb03SMika Penttilä
52a485cb03SMika Penttilä #define SIS_SCAN_TIME_LEN 2
53a485cb03SMika Penttilä
54a485cb03SMika Penttilä /* Supported report types */
55a485cb03SMika Penttilä #define SIS_ALL_IN_ONE_PACKAGE 0x10
56a485cb03SMika Penttilä #define SIS_PKT_IS_TOUCH(x) (((x) & 0x0f) == 0x01)
57a485cb03SMika Penttilä #define SIS_PKT_IS_HIDI2C(x) (((x) & 0x0f) == 0x06)
58a485cb03SMika Penttilä
59a485cb03SMika Penttilä /* Contact properties within report */
60a485cb03SMika Penttilä #define SIS_PKT_HAS_AREA(x) ((x) & BIT(4))
61a485cb03SMika Penttilä #define SIS_PKT_HAS_PRESSURE(x) ((x) & BIT(5))
62a485cb03SMika Penttilä #define SIS_PKT_HAS_SCANTIME(x) ((x) & BIT(6))
63a485cb03SMika Penttilä
64a485cb03SMika Penttilä /* Contact size */
65a485cb03SMika Penttilä #define SIS_BASE_LEN_PER_CONTACT 6
66a485cb03SMika Penttilä #define SIS_AREA_LEN_PER_CONTACT 2
67a485cb03SMika Penttilä #define SIS_PRESSURE_LEN_PER_CONTACT 1
68a485cb03SMika Penttilä
69a485cb03SMika Penttilä /* Offsets within contact data */
70a485cb03SMika Penttilä #define SIS_CONTACT_STATUS_OFFSET 0
71a485cb03SMika Penttilä #define SIS_CONTACT_ID_OFFSET 1 /* Contact ID */
72a485cb03SMika Penttilä #define SIS_CONTACT_X_OFFSET 2
73a485cb03SMika Penttilä #define SIS_CONTACT_Y_OFFSET 4
74a485cb03SMika Penttilä #define SIS_CONTACT_WIDTH_OFFSET 6
75a485cb03SMika Penttilä #define SIS_CONTACT_HEIGHT_OFFSET 7
76a485cb03SMika Penttilä #define SIS_CONTACT_PRESSURE_OFFSET(id) (SIS_PKT_HAS_AREA(id) ? 8 : 6)
77a485cb03SMika Penttilä
78a485cb03SMika Penttilä /* Individual contact state */
79a485cb03SMika Penttilä #define SIS_STATUS_UP 0x0
80a485cb03SMika Penttilä #define SIS_STATUS_DOWN 0x3
81a485cb03SMika Penttilä
82a485cb03SMika Penttilä /* Touchscreen parameters */
83a485cb03SMika Penttilä #define SIS_MAX_FINGERS 10
84a485cb03SMika Penttilä #define SIS_MAX_X 4095
85a485cb03SMika Penttilä #define SIS_MAX_Y 4095
86a485cb03SMika Penttilä #define SIS_MAX_PRESSURE 255
87a485cb03SMika Penttilä
88a485cb03SMika Penttilä /* Resolution diagonal */
89a485cb03SMika Penttilä #define SIS_AREA_LENGTH_LONGER 5792
90a485cb03SMika Penttilä /*((SIS_MAX_X^2) + (SIS_MAX_Y^2))^0.5*/
91a485cb03SMika Penttilä #define SIS_AREA_LENGTH_SHORT 5792
92a485cb03SMika Penttilä #define SIS_AREA_UNIT (5792 / 32)
93a485cb03SMika Penttilä
94a485cb03SMika Penttilä struct sis_ts_data {
95a485cb03SMika Penttilä struct i2c_client *client;
96a485cb03SMika Penttilä struct input_dev *input;
97a485cb03SMika Penttilä
98a485cb03SMika Penttilä struct gpio_desc *attn_gpio;
99a485cb03SMika Penttilä struct gpio_desc *reset_gpio;
100a485cb03SMika Penttilä
101a485cb03SMika Penttilä u8 packet[SIS_MAX_PACKET_SIZE];
102a485cb03SMika Penttilä };
103a485cb03SMika Penttilä
sis_read_packet(struct i2c_client * client,u8 * buf,unsigned int * num_contacts,unsigned int * contact_size)104a485cb03SMika Penttilä static int sis_read_packet(struct i2c_client *client, u8 *buf,
105a485cb03SMika Penttilä unsigned int *num_contacts,
106a485cb03SMika Penttilä unsigned int *contact_size)
107a485cb03SMika Penttilä {
108a485cb03SMika Penttilä int count_idx;
109a485cb03SMika Penttilä int ret;
110a485cb03SMika Penttilä u16 len;
111a485cb03SMika Penttilä u16 crc, pkg_crc;
112a485cb03SMika Penttilä u8 report_id;
113a485cb03SMika Penttilä
114a485cb03SMika Penttilä ret = i2c_master_recv(client, buf, SIS_MAX_PACKET_SIZE);
115a485cb03SMika Penttilä if (ret <= 0)
116a485cb03SMika Penttilä return -EIO;
117a485cb03SMika Penttilä
118a485cb03SMika Penttilä len = get_unaligned_le16(&buf[SIS_PKT_LEN_OFFSET]);
119a485cb03SMika Penttilä if (len > SIS_MAX_PACKET_SIZE) {
120a485cb03SMika Penttilä dev_err(&client->dev,
121a485cb03SMika Penttilä "%s: invalid packet length (%d vs %d)\n",
122a485cb03SMika Penttilä __func__, len, SIS_MAX_PACKET_SIZE);
123a485cb03SMika Penttilä return -E2BIG;
124a485cb03SMika Penttilä }
125a485cb03SMika Penttilä
126a485cb03SMika Penttilä if (len < 10)
127a485cb03SMika Penttilä return -EINVAL;
128a485cb03SMika Penttilä
129a485cb03SMika Penttilä report_id = buf[SIS_PKT_REPORT_OFFSET];
130a485cb03SMika Penttilä count_idx = len - 1;
131a485cb03SMika Penttilä *contact_size = SIS_BASE_LEN_PER_CONTACT;
132a485cb03SMika Penttilä
133a485cb03SMika Penttilä if (report_id != SIS_ALL_IN_ONE_PACKAGE) {
134a485cb03SMika Penttilä if (SIS_PKT_IS_TOUCH(report_id)) {
135a485cb03SMika Penttilä /*
136a485cb03SMika Penttilä * Calculate CRC ignoring packet length
137a485cb03SMika Penttilä * in the beginning and CRC transmitted
138a485cb03SMika Penttilä * at the end of the packet.
139a485cb03SMika Penttilä */
140a485cb03SMika Penttilä crc = crc_itu_t(0, buf + 2, len - 2 - 2);
141a485cb03SMika Penttilä pkg_crc = get_unaligned_le16(&buf[len - 2]);
142a485cb03SMika Penttilä
143a485cb03SMika Penttilä if (crc != pkg_crc) {
144a485cb03SMika Penttilä dev_err(&client->dev,
145a485cb03SMika Penttilä "%s: CRC Error (%d vs %d)\n",
146a485cb03SMika Penttilä __func__, crc, pkg_crc);
147a485cb03SMika Penttilä return -EINVAL;
148a485cb03SMika Penttilä }
149a485cb03SMika Penttilä
150a485cb03SMika Penttilä count_idx -= 2;
151a485cb03SMika Penttilä
152a485cb03SMika Penttilä } else if (!SIS_PKT_IS_HIDI2C(report_id)) {
153a485cb03SMika Penttilä dev_err(&client->dev,
154a485cb03SMika Penttilä "%s: invalid packet ID %#02x\n",
155a485cb03SMika Penttilä __func__, report_id);
156a485cb03SMika Penttilä return -EINVAL;
157a485cb03SMika Penttilä }
158a485cb03SMika Penttilä
159a485cb03SMika Penttilä if (SIS_PKT_HAS_SCANTIME(report_id))
160a485cb03SMika Penttilä count_idx -= SIS_SCAN_TIME_LEN;
161a485cb03SMika Penttilä
162a485cb03SMika Penttilä if (SIS_PKT_HAS_AREA(report_id))
163a485cb03SMika Penttilä *contact_size += SIS_AREA_LEN_PER_CONTACT;
164a485cb03SMika Penttilä if (SIS_PKT_HAS_PRESSURE(report_id))
165a485cb03SMika Penttilä *contact_size += SIS_PRESSURE_LEN_PER_CONTACT;
166a485cb03SMika Penttilä }
167a485cb03SMika Penttilä
168a485cb03SMika Penttilä *num_contacts = buf[count_idx];
169a485cb03SMika Penttilä return 0;
170a485cb03SMika Penttilä }
171a485cb03SMika Penttilä
sis_ts_report_contact(struct sis_ts_data * ts,const u8 * data,u8 id)172a485cb03SMika Penttilä static int sis_ts_report_contact(struct sis_ts_data *ts, const u8 *data, u8 id)
173a485cb03SMika Penttilä {
174a485cb03SMika Penttilä struct input_dev *input = ts->input;
175a485cb03SMika Penttilä int slot;
176a485cb03SMika Penttilä u8 status = data[SIS_CONTACT_STATUS_OFFSET];
177a485cb03SMika Penttilä u8 pressure;
178a485cb03SMika Penttilä u8 height, width;
179a485cb03SMika Penttilä u16 x, y;
180a485cb03SMika Penttilä
181a485cb03SMika Penttilä if (status != SIS_STATUS_DOWN && status != SIS_STATUS_UP) {
182a485cb03SMika Penttilä dev_err(&ts->client->dev, "Unexpected touch status: %#02x\n",
183a485cb03SMika Penttilä data[SIS_CONTACT_STATUS_OFFSET]);
184a485cb03SMika Penttilä return -EINVAL;
185a485cb03SMika Penttilä }
186a485cb03SMika Penttilä
187a485cb03SMika Penttilä slot = input_mt_get_slot_by_key(input, data[SIS_CONTACT_ID_OFFSET]);
188a485cb03SMika Penttilä if (slot < 0)
189a485cb03SMika Penttilä return -ENOENT;
190a485cb03SMika Penttilä
191a485cb03SMika Penttilä input_mt_slot(input, slot);
192a485cb03SMika Penttilä input_mt_report_slot_state(input, MT_TOOL_FINGER,
193a485cb03SMika Penttilä status == SIS_STATUS_DOWN);
194a485cb03SMika Penttilä
195a485cb03SMika Penttilä if (status == SIS_STATUS_DOWN) {
196a485cb03SMika Penttilä pressure = height = width = 1;
197a485cb03SMika Penttilä if (id != SIS_ALL_IN_ONE_PACKAGE) {
198a485cb03SMika Penttilä if (SIS_PKT_HAS_AREA(id)) {
199a485cb03SMika Penttilä width = data[SIS_CONTACT_WIDTH_OFFSET];
200a485cb03SMika Penttilä height = data[SIS_CONTACT_HEIGHT_OFFSET];
201a485cb03SMika Penttilä }
202a485cb03SMika Penttilä
203a485cb03SMika Penttilä if (SIS_PKT_HAS_PRESSURE(id))
204a485cb03SMika Penttilä pressure =
205a485cb03SMika Penttilä data[SIS_CONTACT_PRESSURE_OFFSET(id)];
206a485cb03SMika Penttilä }
207a485cb03SMika Penttilä
208a485cb03SMika Penttilä x = get_unaligned_le16(&data[SIS_CONTACT_X_OFFSET]);
209a485cb03SMika Penttilä y = get_unaligned_le16(&data[SIS_CONTACT_Y_OFFSET]);
210a485cb03SMika Penttilä
211a485cb03SMika Penttilä input_report_abs(input, ABS_MT_TOUCH_MAJOR,
212a485cb03SMika Penttilä width * SIS_AREA_UNIT);
213a485cb03SMika Penttilä input_report_abs(input, ABS_MT_TOUCH_MINOR,
214a485cb03SMika Penttilä height * SIS_AREA_UNIT);
215a485cb03SMika Penttilä input_report_abs(input, ABS_MT_PRESSURE, pressure);
216a485cb03SMika Penttilä input_report_abs(input, ABS_MT_POSITION_X, x);
217a485cb03SMika Penttilä input_report_abs(input, ABS_MT_POSITION_Y, y);
218a485cb03SMika Penttilä }
219a485cb03SMika Penttilä
220a485cb03SMika Penttilä return 0;
221a485cb03SMika Penttilä }
222a485cb03SMika Penttilä
sis_ts_handle_packet(struct sis_ts_data * ts)223a485cb03SMika Penttilä static void sis_ts_handle_packet(struct sis_ts_data *ts)
224a485cb03SMika Penttilä {
225a485cb03SMika Penttilä const u8 *contact;
226a485cb03SMika Penttilä unsigned int num_to_report = 0;
227a485cb03SMika Penttilä unsigned int num_contacts;
228a485cb03SMika Penttilä unsigned int num_reported;
229a485cb03SMika Penttilä unsigned int contact_size;
230a485cb03SMika Penttilä int error;
231a485cb03SMika Penttilä u8 report_id;
232a485cb03SMika Penttilä
233a485cb03SMika Penttilä do {
234a485cb03SMika Penttilä error = sis_read_packet(ts->client, ts->packet,
235a485cb03SMika Penttilä &num_contacts, &contact_size);
236a485cb03SMika Penttilä if (error)
237a485cb03SMika Penttilä break;
238a485cb03SMika Penttilä
239a485cb03SMika Penttilä if (num_to_report == 0) {
240a485cb03SMika Penttilä num_to_report = num_contacts;
241a485cb03SMika Penttilä } else if (num_contacts != 0) {
242a485cb03SMika Penttilä dev_err(&ts->client->dev,
243a485cb03SMika Penttilä "%s: nonzero (%d) point count in tail packet\n",
244a485cb03SMika Penttilä __func__, num_contacts);
245a485cb03SMika Penttilä break;
246a485cb03SMika Penttilä }
247a485cb03SMika Penttilä
248a485cb03SMika Penttilä report_id = ts->packet[SIS_PKT_REPORT_OFFSET];
249a485cb03SMika Penttilä contact = &ts->packet[SIS_PKT_CONTACT_OFFSET];
250a485cb03SMika Penttilä num_reported = 0;
251a485cb03SMika Penttilä
252a485cb03SMika Penttilä while (num_to_report > 0) {
253a485cb03SMika Penttilä error = sis_ts_report_contact(ts, contact, report_id);
254a485cb03SMika Penttilä if (error)
255a485cb03SMika Penttilä break;
256a485cb03SMika Penttilä
257a485cb03SMika Penttilä contact += contact_size;
258a485cb03SMika Penttilä num_to_report--;
259a485cb03SMika Penttilä num_reported++;
260a485cb03SMika Penttilä
261a485cb03SMika Penttilä if (report_id != SIS_ALL_IN_ONE_PACKAGE &&
262a485cb03SMika Penttilä num_reported >= 5) {
263a485cb03SMika Penttilä /*
264a485cb03SMika Penttilä * The remainder of contacts is sent
265a485cb03SMika Penttilä * in the 2nd packet.
266a485cb03SMika Penttilä */
267a485cb03SMika Penttilä break;
268a485cb03SMika Penttilä }
269a485cb03SMika Penttilä }
270a485cb03SMika Penttilä } while (num_to_report > 0);
271a485cb03SMika Penttilä
272a485cb03SMika Penttilä input_mt_sync_frame(ts->input);
273a485cb03SMika Penttilä input_sync(ts->input);
274a485cb03SMika Penttilä }
275a485cb03SMika Penttilä
sis_ts_irq_handler(int irq,void * dev_id)276a485cb03SMika Penttilä static irqreturn_t sis_ts_irq_handler(int irq, void *dev_id)
277a485cb03SMika Penttilä {
278a485cb03SMika Penttilä struct sis_ts_data *ts = dev_id;
279a485cb03SMika Penttilä
280a485cb03SMika Penttilä do {
281a485cb03SMika Penttilä sis_ts_handle_packet(ts);
282a485cb03SMika Penttilä } while (ts->attn_gpio && gpiod_get_value_cansleep(ts->attn_gpio));
283a485cb03SMika Penttilä
284a485cb03SMika Penttilä return IRQ_HANDLED;
285a485cb03SMika Penttilä }
286a485cb03SMika Penttilä
sis_ts_reset(struct sis_ts_data * ts)287a485cb03SMika Penttilä static void sis_ts_reset(struct sis_ts_data *ts)
288a485cb03SMika Penttilä {
289a485cb03SMika Penttilä if (ts->reset_gpio) {
290a485cb03SMika Penttilä /* Get out of reset */
291a485cb03SMika Penttilä usleep_range(1000, 2000);
292a485cb03SMika Penttilä gpiod_set_value(ts->reset_gpio, 1);
293a485cb03SMika Penttilä usleep_range(1000, 2000);
294a485cb03SMika Penttilä gpiod_set_value(ts->reset_gpio, 0);
295a485cb03SMika Penttilä msleep(100);
296a485cb03SMika Penttilä }
297a485cb03SMika Penttilä }
298a485cb03SMika Penttilä
sis_ts_probe(struct i2c_client * client)2996440fab2SUwe Kleine-König static int sis_ts_probe(struct i2c_client *client)
300a485cb03SMika Penttilä {
301a485cb03SMika Penttilä struct sis_ts_data *ts;
302a485cb03SMika Penttilä struct input_dev *input;
303a485cb03SMika Penttilä int error;
304a485cb03SMika Penttilä
305a485cb03SMika Penttilä ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
306a485cb03SMika Penttilä if (!ts)
307a485cb03SMika Penttilä return -ENOMEM;
308a485cb03SMika Penttilä
309a485cb03SMika Penttilä ts->client = client;
310a485cb03SMika Penttilä
311a485cb03SMika Penttilä ts->attn_gpio = devm_gpiod_get_optional(&client->dev,
312a485cb03SMika Penttilä "attn", GPIOD_IN);
313*d3aeb44cSKrzysztof Kozlowski if (IS_ERR(ts->attn_gpio))
314*d3aeb44cSKrzysztof Kozlowski return dev_err_probe(&client->dev, PTR_ERR(ts->attn_gpio),
315*d3aeb44cSKrzysztof Kozlowski "Failed to get attention GPIO\n");
316a485cb03SMika Penttilä
317a485cb03SMika Penttilä ts->reset_gpio = devm_gpiod_get_optional(&client->dev,
318a485cb03SMika Penttilä "reset", GPIOD_OUT_LOW);
319*d3aeb44cSKrzysztof Kozlowski if (IS_ERR(ts->reset_gpio))
320*d3aeb44cSKrzysztof Kozlowski return dev_err_probe(&client->dev, PTR_ERR(ts->reset_gpio),
321*d3aeb44cSKrzysztof Kozlowski "Failed to get reset GPIO\n");
322a485cb03SMika Penttilä
323a485cb03SMika Penttilä sis_ts_reset(ts);
324a485cb03SMika Penttilä
325a485cb03SMika Penttilä ts->input = input = devm_input_allocate_device(&client->dev);
326a485cb03SMika Penttilä if (!input) {
327a485cb03SMika Penttilä dev_err(&client->dev, "Failed to allocate input device\n");
328a485cb03SMika Penttilä return -ENOMEM;
329a485cb03SMika Penttilä }
330a485cb03SMika Penttilä
331a485cb03SMika Penttilä input->name = "SiS Touchscreen";
332a485cb03SMika Penttilä input->id.bustype = BUS_I2C;
333a485cb03SMika Penttilä
334a485cb03SMika Penttilä input_set_abs_params(input, ABS_MT_POSITION_X, 0, SIS_MAX_X, 0, 0);
335a485cb03SMika Penttilä input_set_abs_params(input, ABS_MT_POSITION_Y, 0, SIS_MAX_Y, 0, 0);
336a485cb03SMika Penttilä input_set_abs_params(input, ABS_MT_PRESSURE, 0, SIS_MAX_PRESSURE, 0, 0);
337a485cb03SMika Penttilä input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
338a485cb03SMika Penttilä 0, SIS_AREA_LENGTH_LONGER, 0, 0);
339a485cb03SMika Penttilä input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
340a485cb03SMika Penttilä 0, SIS_AREA_LENGTH_SHORT, 0, 0);
341a485cb03SMika Penttilä
342a485cb03SMika Penttilä error = input_mt_init_slots(input, SIS_MAX_FINGERS, INPUT_MT_DIRECT);
343a485cb03SMika Penttilä if (error) {
344a485cb03SMika Penttilä dev_err(&client->dev,
345a485cb03SMika Penttilä "Failed to initialize MT slots: %d\n", error);
346a485cb03SMika Penttilä return error;
347a485cb03SMika Penttilä }
348a485cb03SMika Penttilä
349a485cb03SMika Penttilä error = devm_request_threaded_irq(&client->dev, client->irq,
350a485cb03SMika Penttilä NULL, sis_ts_irq_handler,
351a485cb03SMika Penttilä IRQF_ONESHOT,
352a485cb03SMika Penttilä client->name, ts);
353a485cb03SMika Penttilä if (error) {
354a485cb03SMika Penttilä dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
355a485cb03SMika Penttilä return error;
356a485cb03SMika Penttilä }
357a485cb03SMika Penttilä
358a485cb03SMika Penttilä error = input_register_device(ts->input);
359a485cb03SMika Penttilä if (error) {
360a485cb03SMika Penttilä dev_err(&client->dev,
361a485cb03SMika Penttilä "Failed to register input device: %d\n", error);
362a485cb03SMika Penttilä return error;
363a485cb03SMika Penttilä }
364a485cb03SMika Penttilä
365a485cb03SMika Penttilä return 0;
366a485cb03SMika Penttilä }
367a485cb03SMika Penttilä
368a485cb03SMika Penttilä #ifdef CONFIG_OF
369a485cb03SMika Penttilä static const struct of_device_id sis_ts_dt_ids[] = {
370a485cb03SMika Penttilä { .compatible = "sis,9200-ts" },
371a485cb03SMika Penttilä { /* sentinel */ }
372a485cb03SMika Penttilä };
373a485cb03SMika Penttilä MODULE_DEVICE_TABLE(of, sis_ts_dt_ids);
374a485cb03SMika Penttilä #endif
375a485cb03SMika Penttilä
376a485cb03SMika Penttilä static const struct i2c_device_id sis_ts_id[] = {
377a485cb03SMika Penttilä { SIS_I2C_NAME, 0 },
378a485cb03SMika Penttilä { "9200-ts", 0 },
379a485cb03SMika Penttilä { /* sentinel */ }
380a485cb03SMika Penttilä };
381a485cb03SMika Penttilä MODULE_DEVICE_TABLE(i2c, sis_ts_id);
382a485cb03SMika Penttilä
383a485cb03SMika Penttilä static struct i2c_driver sis_ts_driver = {
384a485cb03SMika Penttilä .driver = {
385a485cb03SMika Penttilä .name = SIS_I2C_NAME,
386a485cb03SMika Penttilä .of_match_table = of_match_ptr(sis_ts_dt_ids),
387a485cb03SMika Penttilä },
388d8bde56dSUwe Kleine-König .probe = sis_ts_probe,
389a485cb03SMika Penttilä .id_table = sis_ts_id,
390a485cb03SMika Penttilä };
391a485cb03SMika Penttilä module_i2c_driver(sis_ts_driver);
392a485cb03SMika Penttilä
393a485cb03SMika Penttilä MODULE_DESCRIPTION("SiS 9200 Family Touchscreen Driver");
394a485cb03SMika Penttilä MODULE_LICENSE("GPL v2");
395a485cb03SMika Penttilä MODULE_AUTHOR("Mika Penttilä <mika.penttila@nextfour.com>");
396