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1#include <linux/module.h>
2#include <linux/i2c.h>
3#include <linux/interrupt.h>
4#include <linux/slab.h>
5#include <linux/input.h>
6#include <linux/input/mt.h>
7#include <linux/delay.h>
8#include <linux/workqueue.h>
9#include <linux/input/ili210x.h>
10
11#define MAX_TOUCHES 2
12#define DEFAULT_POLL_PERIOD 20
13
14/* Touchscreen commands */
15#define REG_TOUCHDATA 0x10
16#define REG_PANEL_INFO 0x20
17#define REG_FIRMWARE_VERSION 0x40
18#define REG_CALIBRATE 0xcc
19
20struct finger {
21 u8 x_low;
22 u8 x_high;
23 u8 y_low;
24 u8 y_high;
25} __packed;
26
27struct touchdata {
28 u8 status;
29 struct finger finger[MAX_TOUCHES];
30} __packed;
31
32struct panel_info {
33 struct finger finger_max;
34 u8 xchannel_num;
35 u8 ychannel_num;
36} __packed;
37
38struct firmware_version {
39 u8 id;
40 u8 major;
41 u8 minor;
42} __packed;
43
44struct ili210x {
45 struct i2c_client *client;
46 struct input_dev *input;
47 bool (*get_pendown_state)(void);
48 unsigned int poll_period;
49 struct delayed_work dwork;
50};
51
52static int ili210x_read_reg(struct i2c_client *client, u8 reg, void *buf,
53 size_t len)
54{
55 struct i2c_msg msg[2] = {
56 {
57 .addr = client->addr,
58 .flags = 0,
59 .len = 1,
60 .buf = ®,
61 },
62 {
63 .addr = client->addr,
64 .flags = I2C_M_RD,
65 .len = len,
66 .buf = buf,
67 }
68 };
69
70 if (i2c_transfer(client->adapter, msg, 2) != 2) {
71 dev_err(&client->dev, "i2c transfer failed\n");
72 return -EIO;
73 }
74
75 return 0;
76}
77
78static void ili210x_report_events(struct input_dev *input,
79 const struct touchdata *touchdata)
80{
81 int i;
82 bool touch;
83 unsigned int x, y;
84 const struct finger *finger;
85
86 for (i = 0; i < MAX_TOUCHES; i++) {
87 input_mt_slot(input, i);
88
89 finger = &touchdata->finger[i];
90
91 touch = touchdata->status & (1 << i);
92 input_mt_report_slot_state(input, MT_TOOL_FINGER, touch);
93 if (touch) {
94 x = finger->x_low | (finger->x_high << 8);
95 y = finger->y_low | (finger->y_high << 8);
96
97 input_report_abs(input, ABS_MT_POSITION_X, x);
98 input_report_abs(input, ABS_MT_POSITION_Y, y);
99 }
100 }
101
102 input_mt_report_pointer_emulation(input, false);
103 input_sync(input);
104}
105
106static bool get_pendown_state(const struct ili210x *priv)
107{
108 bool state = false;
109
110 if (priv->get_pendown_state)
111 state = priv->get_pendown_state();
112
113 return state;
114}
115
116static void ili210x_work(struct work_struct *work)
117{
118 struct ili210x *priv = container_of(work, struct ili210x,
119 dwork.work);
120 struct i2c_client *client = priv->client;
121 struct touchdata touchdata;
122 int error;
123
124 error = ili210x_read_reg(client, REG_TOUCHDATA,
125 &touchdata, sizeof(touchdata));
126 if (error) {
127 dev_err(&client->dev,
128 "Unable to get touchdata, err = %d\n", error);
129 return;
130 }
131
132 ili210x_report_events(priv->input, &touchdata);
133
134 if ((touchdata.status & 0xf3) || get_pendown_state(priv))
135 schedule_delayed_work(&priv->dwork,
136 msecs_to_jiffies(priv->poll_period));
137}
138
139static irqreturn_t ili210x_irq(int irq, void *irq_data)
140{
141 struct ili210x *priv = irq_data;
142
143 schedule_delayed_work(&priv->dwork, 0);
144
145 return IRQ_HANDLED;
146}
147
148static ssize_t ili210x_calibrate(struct device *dev,
149 struct device_attribute *attr,
150 const char *buf, size_t count)
151{
152 struct i2c_client *client = to_i2c_client(dev);
153 struct ili210x *priv = i2c_get_clientdata(client);
154 unsigned long calibrate;
155 int rc;
156 u8 cmd = REG_CALIBRATE;
157
158 if (kstrtoul(buf, 10, &calibrate))
159 return -EINVAL;
160
161 if (calibrate > 1)
162 return -EINVAL;
163
164 if (calibrate) {
165 rc = i2c_master_send(priv->client, &cmd, sizeof(cmd));
166 if (rc != sizeof(cmd))
167 return -EIO;
168 }
169
170 return count;
171}
172static DEVICE_ATTR(calibrate, 0644, NULL, ili210x_calibrate);
173
174static struct attribute *ili210x_attributes[] = {
175 &dev_attr_calibrate.attr,
176 NULL,
177};
178
179static const struct attribute_group ili210x_attr_group = {
180 .attrs = ili210x_attributes,
181};
182
183static int ili210x_i2c_probe(struct i2c_client *client,
184 const struct i2c_device_id *id)
185{
186 struct device *dev = &client->dev;
187 const struct ili210x_platform_data *pdata = dev_get_platdata(dev);
188 struct ili210x *priv;
189 struct input_dev *input;
190 struct panel_info panel;
191 struct firmware_version firmware;
192 int xmax, ymax;
193 int error;
194
195 dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");
196
197 if (!pdata) {
198 dev_err(dev, "No platform data!\n");
199 return -EINVAL;
200 }
201
202 if (client->irq <= 0) {
203 dev_err(dev, "No IRQ!\n");
204 return -EINVAL;
205 }
206
207 /* Get firmware version */
208 error = ili210x_read_reg(client, REG_FIRMWARE_VERSION,
209 &firmware, sizeof(firmware));
210 if (error) {
211 dev_err(dev, "Failed to get firmware version, err: %d\n",
212 error);
213 return error;
214 }
215
216 /* get panel info */
217 error = ili210x_read_reg(client, REG_PANEL_INFO, &panel, sizeof(panel));
218 if (error) {
219 dev_err(dev, "Failed to get panel informations, err: %d\n",
220 error);
221 return error;
222 }
223
224 xmax = panel.finger_max.x_low | (panel.finger_max.x_high << 8);
225 ymax = panel.finger_max.y_low | (panel.finger_max.y_high << 8);
226
227 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
228 input = input_allocate_device();
229 if (!priv || !input) {
230 error = -ENOMEM;
231 goto err_free_mem;
232 }
233
234 priv->client = client;
235 priv->input = input;
236 priv->get_pendown_state = pdata->get_pendown_state;
237 priv->poll_period = pdata->poll_period ? : DEFAULT_POLL_PERIOD;
238 INIT_DELAYED_WORK(&priv->dwork, ili210x_work);
239
240 /* Setup input device */
241 input->name = "ILI210x Touchscreen";
242 input->id.bustype = BUS_I2C;
243 input->dev.parent = dev;
244
245 __set_bit(EV_SYN, input->evbit);
246 __set_bit(EV_KEY, input->evbit);
247 __set_bit(EV_ABS, input->evbit);
248 __set_bit(BTN_TOUCH, input->keybit);
249
250 /* Single touch */
251 input_set_abs_params(input, ABS_X, 0, xmax, 0, 0);
252 input_set_abs_params(input, ABS_Y, 0, ymax, 0, 0);
253
254 /* Multi touch */
255 input_mt_init_slots(input, MAX_TOUCHES, 0);
256 input_set_abs_params(input, ABS_MT_POSITION_X, 0, xmax, 0, 0);
257 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ymax, 0, 0);
258
259 input_set_drvdata(input, priv);
260 i2c_set_clientdata(client, priv);
261
262 error = request_irq(client->irq, ili210x_irq, pdata->irq_flags,
263 client->name, priv);
264 if (error) {
265 dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
266 error);
267 goto err_free_mem;
268 }
269
270 error = sysfs_create_group(&dev->kobj, &ili210x_attr_group);
271 if (error) {
272 dev_err(dev, "Unable to create sysfs attributes, err: %d\n",
273 error);
274 goto err_free_irq;
275 }
276
277 error = input_register_device(priv->input);
278 if (error) {
279 dev_err(dev, "Cannot regiser input device, err: %d\n", error);
280 goto err_remove_sysfs;
281 }
282
283 device_init_wakeup(&client->dev, 1);
284
285 dev_dbg(dev,
286 "ILI210x initialized (IRQ: %d), firmware version %d.%d.%d",
287 client->irq, firmware.id, firmware.major, firmware.minor);
288
289 return 0;
290
291err_remove_sysfs:
292 sysfs_remove_group(&dev->kobj, &ili210x_attr_group);
293err_free_irq:
294 free_irq(client->irq, priv);
295err_free_mem:
296 input_free_device(input);
297 kfree(priv);
298 return error;
299}
300
301static int ili210x_i2c_remove(struct i2c_client *client)
302{
303 struct ili210x *priv = i2c_get_clientdata(client);
304
305 sysfs_remove_group(&client->dev.kobj, &ili210x_attr_group);
306 free_irq(priv->client->irq, priv);
307 cancel_delayed_work_sync(&priv->dwork);
308 input_unregister_device(priv->input);
309 kfree(priv);
310
311 return 0;
312}
313
314#ifdef CONFIG_PM_SLEEP
315static int ili210x_i2c_suspend(struct device *dev)
316{
317 struct i2c_client *client = to_i2c_client(dev);
318
319 if (device_may_wakeup(&client->dev))
320 enable_irq_wake(client->irq);
321
322 return 0;
323}
324
325static int ili210x_i2c_resume(struct device *dev)
326{
327 struct i2c_client *client = to_i2c_client(dev);
328
329 if (device_may_wakeup(&client->dev))
330 disable_irq_wake(client->irq);
331
332 return 0;
333}
334#endif
335
336static SIMPLE_DEV_PM_OPS(ili210x_i2c_pm,
337 ili210x_i2c_suspend, ili210x_i2c_resume);
338
339static const struct i2c_device_id ili210x_i2c_id[] = {
340 { "ili210x", 0 },
341 { }
342};
343MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);
344
345static struct i2c_driver ili210x_ts_driver = {
346 .driver = {
347 .name = "ili210x_i2c",
348 .owner = THIS_MODULE,
349 .pm = &ili210x_i2c_pm,
350 },
351 .id_table = ili210x_i2c_id,
352 .probe = ili210x_i2c_probe,
353 .remove = ili210x_i2c_remove,
354};
355
356module_i2c_driver(ili210x_ts_driver);
357
358MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
359MODULE_DESCRIPTION("ILI210X I2C Touchscreen Driver");
360MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2#include <linux/delay.h>
3#include <linux/gpio/consumer.h>
4#include <linux/i2c.h>
5#include <linux/input.h>
6#include <linux/input/mt.h>
7#include <linux/input/touchscreen.h>
8#include <linux/interrupt.h>
9#include <linux/module.h>
10#include <linux/of_device.h>
11#include <linux/sizes.h>
12#include <linux/slab.h>
13#include <asm/unaligned.h>
14
15#define ILI2XXX_POLL_PERIOD 20
16
17#define ILI210X_DATA_SIZE 64
18#define ILI211X_DATA_SIZE 43
19#define ILI251X_DATA_SIZE1 31
20#define ILI251X_DATA_SIZE2 20
21
22/* Touchscreen commands */
23#define REG_TOUCHDATA 0x10
24#define REG_PANEL_INFO 0x20
25#define REG_CALIBRATE 0xcc
26
27struct ili2xxx_chip {
28 int (*read_reg)(struct i2c_client *client, u8 reg,
29 void *buf, size_t len);
30 int (*get_touch_data)(struct i2c_client *client, u8 *data);
31 bool (*parse_touch_data)(const u8 *data, unsigned int finger,
32 unsigned int *x, unsigned int *y);
33 bool (*continue_polling)(const u8 *data, bool touch);
34 unsigned int max_touches;
35 unsigned int resolution;
36 bool has_calibrate_reg;
37};
38
39struct ili210x {
40 struct i2c_client *client;
41 struct input_dev *input;
42 struct gpio_desc *reset_gpio;
43 struct touchscreen_properties prop;
44 const struct ili2xxx_chip *chip;
45 bool stop;
46};
47
48static int ili210x_read_reg(struct i2c_client *client,
49 u8 reg, void *buf, size_t len)
50{
51 struct i2c_msg msg[] = {
52 {
53 .addr = client->addr,
54 .flags = 0,
55 .len = 1,
56 .buf = ®,
57 },
58 {
59 .addr = client->addr,
60 .flags = I2C_M_RD,
61 .len = len,
62 .buf = buf,
63 }
64 };
65 int error, ret;
66
67 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
68 if (ret != ARRAY_SIZE(msg)) {
69 error = ret < 0 ? ret : -EIO;
70 dev_err(&client->dev, "%s failed: %d\n", __func__, error);
71 return error;
72 }
73
74 return 0;
75}
76
77static int ili210x_read_touch_data(struct i2c_client *client, u8 *data)
78{
79 return ili210x_read_reg(client, REG_TOUCHDATA,
80 data, ILI210X_DATA_SIZE);
81}
82
83static bool ili210x_touchdata_to_coords(const u8 *touchdata,
84 unsigned int finger,
85 unsigned int *x, unsigned int *y)
86{
87 if (touchdata[0] & BIT(finger))
88 return false;
89
90 *x = get_unaligned_be16(touchdata + 1 + (finger * 4) + 0);
91 *y = get_unaligned_be16(touchdata + 1 + (finger * 4) + 2);
92
93 return true;
94}
95
96static bool ili210x_check_continue_polling(const u8 *data, bool touch)
97{
98 return data[0] & 0xf3;
99}
100
101static const struct ili2xxx_chip ili210x_chip = {
102 .read_reg = ili210x_read_reg,
103 .get_touch_data = ili210x_read_touch_data,
104 .parse_touch_data = ili210x_touchdata_to_coords,
105 .continue_polling = ili210x_check_continue_polling,
106 .max_touches = 2,
107 .has_calibrate_reg = true,
108};
109
110static int ili211x_read_touch_data(struct i2c_client *client, u8 *data)
111{
112 s16 sum = 0;
113 int error;
114 int ret;
115 int i;
116
117 ret = i2c_master_recv(client, data, ILI211X_DATA_SIZE);
118 if (ret != ILI211X_DATA_SIZE) {
119 error = ret < 0 ? ret : -EIO;
120 dev_err(&client->dev, "%s failed: %d\n", __func__, error);
121 return error;
122 }
123
124 /* This chip uses custom checksum at the end of data */
125 for (i = 0; i < ILI211X_DATA_SIZE - 1; i++)
126 sum = (sum + data[i]) & 0xff;
127
128 if ((-sum & 0xff) != data[ILI211X_DATA_SIZE - 1]) {
129 dev_err(&client->dev,
130 "CRC error (crc=0x%02x expected=0x%02x)\n",
131 sum, data[ILI211X_DATA_SIZE - 1]);
132 return -EIO;
133 }
134
135 return 0;
136}
137
138static bool ili211x_touchdata_to_coords(const u8 *touchdata,
139 unsigned int finger,
140 unsigned int *x, unsigned int *y)
141{
142 u32 data;
143
144 data = get_unaligned_be32(touchdata + 1 + (finger * 4) + 0);
145 if (data == 0xffffffff) /* Finger up */
146 return false;
147
148 *x = ((touchdata[1 + (finger * 4) + 0] & 0xf0) << 4) |
149 touchdata[1 + (finger * 4) + 1];
150 *y = ((touchdata[1 + (finger * 4) + 0] & 0x0f) << 8) |
151 touchdata[1 + (finger * 4) + 2];
152
153 return true;
154}
155
156static bool ili211x_decline_polling(const u8 *data, bool touch)
157{
158 return false;
159}
160
161static const struct ili2xxx_chip ili211x_chip = {
162 .read_reg = ili210x_read_reg,
163 .get_touch_data = ili211x_read_touch_data,
164 .parse_touch_data = ili211x_touchdata_to_coords,
165 .continue_polling = ili211x_decline_polling,
166 .max_touches = 10,
167 .resolution = 2048,
168};
169
170static bool ili212x_touchdata_to_coords(const u8 *touchdata,
171 unsigned int finger,
172 unsigned int *x, unsigned int *y)
173{
174 u16 val;
175
176 val = get_unaligned_be16(touchdata + 3 + (finger * 5) + 0);
177 if (!(val & BIT(15))) /* Touch indication */
178 return false;
179
180 *x = val & 0x3fff;
181 *y = get_unaligned_be16(touchdata + 3 + (finger * 5) + 2);
182
183 return true;
184}
185
186static bool ili212x_check_continue_polling(const u8 *data, bool touch)
187{
188 return touch;
189}
190
191static const struct ili2xxx_chip ili212x_chip = {
192 .read_reg = ili210x_read_reg,
193 .get_touch_data = ili210x_read_touch_data,
194 .parse_touch_data = ili212x_touchdata_to_coords,
195 .continue_polling = ili212x_check_continue_polling,
196 .max_touches = 10,
197 .has_calibrate_reg = true,
198};
199
200static int ili251x_read_reg(struct i2c_client *client,
201 u8 reg, void *buf, size_t len)
202{
203 int error;
204 int ret;
205
206 ret = i2c_master_send(client, ®, 1);
207 if (ret == 1) {
208 usleep_range(5000, 5500);
209
210 ret = i2c_master_recv(client, buf, len);
211 if (ret == len)
212 return 0;
213 }
214
215 error = ret < 0 ? ret : -EIO;
216 dev_err(&client->dev, "%s failed: %d\n", __func__, error);
217 return ret;
218}
219
220static int ili251x_read_touch_data(struct i2c_client *client, u8 *data)
221{
222 int error;
223
224 error = ili251x_read_reg(client, REG_TOUCHDATA,
225 data, ILI251X_DATA_SIZE1);
226 if (!error && data[0] == 2) {
227 error = i2c_master_recv(client, data + ILI251X_DATA_SIZE1,
228 ILI251X_DATA_SIZE2);
229 if (error >= 0 && error != ILI251X_DATA_SIZE2)
230 error = -EIO;
231 }
232
233 return error;
234}
235
236static bool ili251x_touchdata_to_coords(const u8 *touchdata,
237 unsigned int finger,
238 unsigned int *x, unsigned int *y)
239{
240 u16 val;
241
242 val = get_unaligned_be16(touchdata + 1 + (finger * 5) + 0);
243 if (!(val & BIT(15))) /* Touch indication */
244 return false;
245
246 *x = val & 0x3fff;
247 *y = get_unaligned_be16(touchdata + 1 + (finger * 5) + 2);
248
249 return true;
250}
251
252static bool ili251x_check_continue_polling(const u8 *data, bool touch)
253{
254 return touch;
255}
256
257static const struct ili2xxx_chip ili251x_chip = {
258 .read_reg = ili251x_read_reg,
259 .get_touch_data = ili251x_read_touch_data,
260 .parse_touch_data = ili251x_touchdata_to_coords,
261 .continue_polling = ili251x_check_continue_polling,
262 .max_touches = 10,
263 .has_calibrate_reg = true,
264};
265
266static bool ili210x_report_events(struct ili210x *priv, u8 *touchdata)
267{
268 struct input_dev *input = priv->input;
269 int i;
270 bool contact = false, touch;
271 unsigned int x = 0, y = 0;
272
273 for (i = 0; i < priv->chip->max_touches; i++) {
274 touch = priv->chip->parse_touch_data(touchdata, i, &x, &y);
275
276 input_mt_slot(input, i);
277 if (input_mt_report_slot_state(input, MT_TOOL_FINGER, touch)) {
278 touchscreen_report_pos(input, &priv->prop, x, y, true);
279 contact = true;
280 }
281 }
282
283 input_mt_report_pointer_emulation(input, false);
284 input_sync(input);
285
286 return contact;
287}
288
289static irqreturn_t ili210x_irq(int irq, void *irq_data)
290{
291 struct ili210x *priv = irq_data;
292 struct i2c_client *client = priv->client;
293 const struct ili2xxx_chip *chip = priv->chip;
294 u8 touchdata[ILI210X_DATA_SIZE] = { 0 };
295 bool keep_polling;
296 bool touch;
297 int error;
298
299 do {
300 error = chip->get_touch_data(client, touchdata);
301 if (error) {
302 dev_err(&client->dev,
303 "Unable to get touch data: %d\n", error);
304 break;
305 }
306
307 touch = ili210x_report_events(priv, touchdata);
308 keep_polling = chip->continue_polling(touchdata, touch);
309 if (keep_polling)
310 msleep(ILI2XXX_POLL_PERIOD);
311 } while (!priv->stop && keep_polling);
312
313 return IRQ_HANDLED;
314}
315
316static ssize_t ili210x_calibrate(struct device *dev,
317 struct device_attribute *attr,
318 const char *buf, size_t count)
319{
320 struct i2c_client *client = to_i2c_client(dev);
321 struct ili210x *priv = i2c_get_clientdata(client);
322 unsigned long calibrate;
323 int rc;
324 u8 cmd = REG_CALIBRATE;
325
326 if (kstrtoul(buf, 10, &calibrate))
327 return -EINVAL;
328
329 if (calibrate > 1)
330 return -EINVAL;
331
332 if (calibrate) {
333 rc = i2c_master_send(priv->client, &cmd, sizeof(cmd));
334 if (rc != sizeof(cmd))
335 return -EIO;
336 }
337
338 return count;
339}
340static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate);
341
342static struct attribute *ili210x_attributes[] = {
343 &dev_attr_calibrate.attr,
344 NULL,
345};
346
347static umode_t ili210x_calibrate_visible(struct kobject *kobj,
348 struct attribute *attr, int index)
349{
350 struct device *dev = kobj_to_dev(kobj);
351 struct i2c_client *client = to_i2c_client(dev);
352 struct ili210x *priv = i2c_get_clientdata(client);
353
354 return priv->chip->has_calibrate_reg ? attr->mode : 0;
355}
356
357static const struct attribute_group ili210x_attr_group = {
358 .attrs = ili210x_attributes,
359 .is_visible = ili210x_calibrate_visible,
360};
361
362static void ili210x_power_down(void *data)
363{
364 struct gpio_desc *reset_gpio = data;
365
366 gpiod_set_value_cansleep(reset_gpio, 1);
367}
368
369static void ili210x_stop(void *data)
370{
371 struct ili210x *priv = data;
372
373 /* Tell ISR to quit even if there is a contact. */
374 priv->stop = true;
375}
376
377static int ili210x_i2c_probe(struct i2c_client *client,
378 const struct i2c_device_id *id)
379{
380 struct device *dev = &client->dev;
381 const struct ili2xxx_chip *chip;
382 struct ili210x *priv;
383 struct gpio_desc *reset_gpio;
384 struct input_dev *input;
385 int error;
386 unsigned int max_xy;
387
388 dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");
389
390 chip = device_get_match_data(dev);
391 if (!chip && id)
392 chip = (const struct ili2xxx_chip *)id->driver_data;
393 if (!chip) {
394 dev_err(&client->dev, "unknown device model\n");
395 return -ENODEV;
396 }
397
398 if (client->irq <= 0) {
399 dev_err(dev, "No IRQ!\n");
400 return -EINVAL;
401 }
402
403 reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
404 if (IS_ERR(reset_gpio))
405 return PTR_ERR(reset_gpio);
406
407 if (reset_gpio) {
408 error = devm_add_action_or_reset(dev, ili210x_power_down,
409 reset_gpio);
410 if (error)
411 return error;
412
413 usleep_range(50, 100);
414 gpiod_set_value_cansleep(reset_gpio, 0);
415 msleep(100);
416 }
417
418 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
419 if (!priv)
420 return -ENOMEM;
421
422 input = devm_input_allocate_device(dev);
423 if (!input)
424 return -ENOMEM;
425
426 priv->client = client;
427 priv->input = input;
428 priv->reset_gpio = reset_gpio;
429 priv->chip = chip;
430 i2c_set_clientdata(client, priv);
431
432 /* Setup input device */
433 input->name = "ILI210x Touchscreen";
434 input->id.bustype = BUS_I2C;
435
436 /* Multi touch */
437 max_xy = (chip->resolution ?: SZ_64K) - 1;
438 input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_xy, 0, 0);
439 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_xy, 0, 0);
440 touchscreen_parse_properties(input, true, &priv->prop);
441
442 error = input_mt_init_slots(input, priv->chip->max_touches,
443 INPUT_MT_DIRECT);
444 if (error) {
445 dev_err(dev, "Unable to set up slots, err: %d\n", error);
446 return error;
447 }
448
449 error = devm_request_threaded_irq(dev, client->irq, NULL, ili210x_irq,
450 IRQF_ONESHOT, client->name, priv);
451 if (error) {
452 dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
453 error);
454 return error;
455 }
456
457 error = devm_add_action_or_reset(dev, ili210x_stop, priv);
458 if (error)
459 return error;
460
461 error = devm_device_add_group(dev, &ili210x_attr_group);
462 if (error) {
463 dev_err(dev, "Unable to create sysfs attributes, err: %d\n",
464 error);
465 return error;
466 }
467
468 error = input_register_device(priv->input);
469 if (error) {
470 dev_err(dev, "Cannot register input device, err: %d\n", error);
471 return error;
472 }
473
474 return 0;
475}
476
477static const struct i2c_device_id ili210x_i2c_id[] = {
478 { "ili210x", (long)&ili210x_chip },
479 { "ili2117", (long)&ili211x_chip },
480 { "ili2120", (long)&ili212x_chip },
481 { "ili251x", (long)&ili251x_chip },
482 { }
483};
484MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);
485
486static const struct of_device_id ili210x_dt_ids[] = {
487 { .compatible = "ilitek,ili210x", .data = &ili210x_chip },
488 { .compatible = "ilitek,ili2117", .data = &ili211x_chip },
489 { .compatible = "ilitek,ili2120", .data = &ili212x_chip },
490 { .compatible = "ilitek,ili251x", .data = &ili251x_chip },
491 { }
492};
493MODULE_DEVICE_TABLE(of, ili210x_dt_ids);
494
495static struct i2c_driver ili210x_ts_driver = {
496 .driver = {
497 .name = "ili210x_i2c",
498 .of_match_table = ili210x_dt_ids,
499 },
500 .id_table = ili210x_i2c_id,
501 .probe = ili210x_i2c_probe,
502};
503
504module_i2c_driver(ili210x_ts_driver);
505
506MODULE_AUTHOR("Olivier Sobrie <olivier@sobrie.be>");
507MODULE_DESCRIPTION("ILI210X I2C Touchscreen Driver");
508MODULE_LICENSE("GPL");