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1/*
2 * MAX8997-haptic controller driver
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * Donggeun Kim <dg77.kim@samsung.com>
6 *
7 * This program is not provided / owned by Maxim Integrated Products.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25#include <linux/module.h>
26#include <linux/slab.h>
27#include <linux/platform_device.h>
28#include <linux/err.h>
29#include <linux/pwm.h>
30#include <linux/input.h>
31#include <linux/mfd/max8997-private.h>
32#include <linux/mfd/max8997.h>
33#include <linux/regulator/consumer.h>
34
35/* Haptic configuration 2 register */
36#define MAX8997_MOTOR_TYPE_SHIFT 7
37#define MAX8997_ENABLE_SHIFT 6
38#define MAX8997_MODE_SHIFT 5
39
40/* Haptic driver configuration register */
41#define MAX8997_CYCLE_SHIFT 6
42#define MAX8997_SIG_PERIOD_SHIFT 4
43#define MAX8997_SIG_DUTY_SHIFT 2
44#define MAX8997_PWM_DUTY_SHIFT 0
45
46struct max8997_haptic {
47 struct device *dev;
48 struct i2c_client *client;
49 struct input_dev *input_dev;
50 struct regulator *regulator;
51
52 struct work_struct work;
53 struct mutex mutex;
54
55 bool enabled;
56 unsigned int level;
57
58 struct pwm_device *pwm;
59 unsigned int pwm_period;
60 enum max8997_haptic_pwm_divisor pwm_divisor;
61
62 enum max8997_haptic_motor_type type;
63 enum max8997_haptic_pulse_mode mode;
64
65 unsigned int internal_mode_pattern;
66 unsigned int pattern_cycle;
67 unsigned int pattern_signal_period;
68};
69
70static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip)
71{
72 int ret = 0;
73
74 if (chip->mode == MAX8997_EXTERNAL_MODE) {
75 unsigned int duty = chip->pwm_period * chip->level / 100;
76 ret = pwm_config(chip->pwm, duty, chip->pwm_period);
77 } else {
78 int i;
79 u8 duty_index = 0;
80
81 for (i = 0; i <= 64; i++) {
82 if (chip->level <= i * 100 / 64) {
83 duty_index = i;
84 break;
85 }
86 }
87 switch (chip->internal_mode_pattern) {
88 case 0:
89 max8997_write_reg(chip->client,
90 MAX8997_HAPTIC_REG_SIGPWMDC1, duty_index);
91 break;
92 case 1:
93 max8997_write_reg(chip->client,
94 MAX8997_HAPTIC_REG_SIGPWMDC2, duty_index);
95 break;
96 case 2:
97 max8997_write_reg(chip->client,
98 MAX8997_HAPTIC_REG_SIGPWMDC3, duty_index);
99 break;
100 case 3:
101 max8997_write_reg(chip->client,
102 MAX8997_HAPTIC_REG_SIGPWMDC4, duty_index);
103 break;
104 default:
105 break;
106 }
107 }
108 return ret;
109}
110
111static void max8997_haptic_configure(struct max8997_haptic *chip)
112{
113 u8 value;
114
115 value = chip->type << MAX8997_MOTOR_TYPE_SHIFT |
116 chip->enabled << MAX8997_ENABLE_SHIFT |
117 chip->mode << MAX8997_MODE_SHIFT | chip->pwm_divisor;
118 max8997_write_reg(chip->client, MAX8997_HAPTIC_REG_CONF2, value);
119
120 if (chip->mode == MAX8997_INTERNAL_MODE && chip->enabled) {
121 value = chip->internal_mode_pattern << MAX8997_CYCLE_SHIFT |
122 chip->internal_mode_pattern << MAX8997_SIG_PERIOD_SHIFT |
123 chip->internal_mode_pattern << MAX8997_SIG_DUTY_SHIFT |
124 chip->internal_mode_pattern << MAX8997_PWM_DUTY_SHIFT;
125 max8997_write_reg(chip->client,
126 MAX8997_HAPTIC_REG_DRVCONF, value);
127
128 switch (chip->internal_mode_pattern) {
129 case 0:
130 value = chip->pattern_cycle << 4;
131 max8997_write_reg(chip->client,
132 MAX8997_HAPTIC_REG_CYCLECONF1, value);
133 value = chip->pattern_signal_period;
134 max8997_write_reg(chip->client,
135 MAX8997_HAPTIC_REG_SIGCONF1, value);
136 break;
137
138 case 1:
139 value = chip->pattern_cycle;
140 max8997_write_reg(chip->client,
141 MAX8997_HAPTIC_REG_CYCLECONF1, value);
142 value = chip->pattern_signal_period;
143 max8997_write_reg(chip->client,
144 MAX8997_HAPTIC_REG_SIGCONF2, value);
145 break;
146
147 case 2:
148 value = chip->pattern_cycle << 4;
149 max8997_write_reg(chip->client,
150 MAX8997_HAPTIC_REG_CYCLECONF2, value);
151 value = chip->pattern_signal_period;
152 max8997_write_reg(chip->client,
153 MAX8997_HAPTIC_REG_SIGCONF3, value);
154 break;
155
156 case 3:
157 value = chip->pattern_cycle;
158 max8997_write_reg(chip->client,
159 MAX8997_HAPTIC_REG_CYCLECONF2, value);
160 value = chip->pattern_signal_period;
161 max8997_write_reg(chip->client,
162 MAX8997_HAPTIC_REG_SIGCONF4, value);
163 break;
164
165 default:
166 break;
167 }
168 }
169}
170
171static void max8997_haptic_enable(struct max8997_haptic *chip)
172{
173 int error;
174
175 mutex_lock(&chip->mutex);
176
177 error = max8997_haptic_set_duty_cycle(chip);
178 if (error) {
179 dev_err(chip->dev, "set_pwm_cycle failed, error: %d\n", error);
180 goto out;
181 }
182
183 if (!chip->enabled) {
184 error = regulator_enable(chip->regulator);
185 if (error) {
186 dev_err(chip->dev, "Failed to enable regulator\n");
187 goto out;
188 }
189 max8997_haptic_configure(chip);
190 if (chip->mode == MAX8997_EXTERNAL_MODE) {
191 error = pwm_enable(chip->pwm);
192 if (error) {
193 dev_err(chip->dev, "Failed to enable PWM\n");
194 regulator_disable(chip->regulator);
195 goto out;
196 }
197 }
198 chip->enabled = true;
199 }
200
201out:
202 mutex_unlock(&chip->mutex);
203}
204
205static void max8997_haptic_disable(struct max8997_haptic *chip)
206{
207 mutex_lock(&chip->mutex);
208
209 if (chip->enabled) {
210 chip->enabled = false;
211 max8997_haptic_configure(chip);
212 if (chip->mode == MAX8997_EXTERNAL_MODE)
213 pwm_disable(chip->pwm);
214 regulator_disable(chip->regulator);
215 }
216
217 mutex_unlock(&chip->mutex);
218}
219
220static void max8997_haptic_play_effect_work(struct work_struct *work)
221{
222 struct max8997_haptic *chip =
223 container_of(work, struct max8997_haptic, work);
224
225 if (chip->level)
226 max8997_haptic_enable(chip);
227 else
228 max8997_haptic_disable(chip);
229}
230
231static int max8997_haptic_play_effect(struct input_dev *dev, void *data,
232 struct ff_effect *effect)
233{
234 struct max8997_haptic *chip = input_get_drvdata(dev);
235
236 chip->level = effect->u.rumble.strong_magnitude;
237 if (!chip->level)
238 chip->level = effect->u.rumble.weak_magnitude;
239
240 schedule_work(&chip->work);
241
242 return 0;
243}
244
245static void max8997_haptic_close(struct input_dev *dev)
246{
247 struct max8997_haptic *chip = input_get_drvdata(dev);
248
249 cancel_work_sync(&chip->work);
250 max8997_haptic_disable(chip);
251}
252
253static int max8997_haptic_probe(struct platform_device *pdev)
254{
255 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
256 const struct max8997_platform_data *pdata =
257 dev_get_platdata(iodev->dev);
258 const struct max8997_haptic_platform_data *haptic_pdata = NULL;
259 struct max8997_haptic *chip;
260 struct input_dev *input_dev;
261 int error;
262
263 if (pdata)
264 haptic_pdata = pdata->haptic_pdata;
265
266 if (!haptic_pdata) {
267 dev_err(&pdev->dev, "no haptic platform data\n");
268 return -EINVAL;
269 }
270
271 chip = kzalloc(sizeof(struct max8997_haptic), GFP_KERNEL);
272 input_dev = input_allocate_device();
273 if (!chip || !input_dev) {
274 dev_err(&pdev->dev, "unable to allocate memory\n");
275 error = -ENOMEM;
276 goto err_free_mem;
277 }
278
279 INIT_WORK(&chip->work, max8997_haptic_play_effect_work);
280 mutex_init(&chip->mutex);
281
282 chip->client = iodev->haptic;
283 chip->dev = &pdev->dev;
284 chip->input_dev = input_dev;
285 chip->pwm_period = haptic_pdata->pwm_period;
286 chip->type = haptic_pdata->type;
287 chip->mode = haptic_pdata->mode;
288 chip->pwm_divisor = haptic_pdata->pwm_divisor;
289
290 switch (chip->mode) {
291 case MAX8997_INTERNAL_MODE:
292 chip->internal_mode_pattern =
293 haptic_pdata->internal_mode_pattern;
294 chip->pattern_cycle = haptic_pdata->pattern_cycle;
295 chip->pattern_signal_period =
296 haptic_pdata->pattern_signal_period;
297 break;
298
299 case MAX8997_EXTERNAL_MODE:
300 chip->pwm = pwm_request(haptic_pdata->pwm_channel_id,
301 "max8997-haptic");
302 if (IS_ERR(chip->pwm)) {
303 error = PTR_ERR(chip->pwm);
304 dev_err(&pdev->dev,
305 "unable to request PWM for haptic, error: %d\n",
306 error);
307 goto err_free_mem;
308 }
309 break;
310
311 default:
312 dev_err(&pdev->dev,
313 "Invalid chip mode specified (%d)\n", chip->mode);
314 error = -EINVAL;
315 goto err_free_mem;
316 }
317
318 chip->regulator = regulator_get(&pdev->dev, "inmotor");
319 if (IS_ERR(chip->regulator)) {
320 error = PTR_ERR(chip->regulator);
321 dev_err(&pdev->dev,
322 "unable to get regulator, error: %d\n",
323 error);
324 goto err_free_pwm;
325 }
326
327 input_dev->name = "max8997-haptic";
328 input_dev->id.version = 1;
329 input_dev->dev.parent = &pdev->dev;
330 input_dev->close = max8997_haptic_close;
331 input_set_drvdata(input_dev, chip);
332 input_set_capability(input_dev, EV_FF, FF_RUMBLE);
333
334 error = input_ff_create_memless(input_dev, NULL,
335 max8997_haptic_play_effect);
336 if (error) {
337 dev_err(&pdev->dev,
338 "unable to create FF device, error: %d\n",
339 error);
340 goto err_put_regulator;
341 }
342
343 error = input_register_device(input_dev);
344 if (error) {
345 dev_err(&pdev->dev,
346 "unable to register input device, error: %d\n",
347 error);
348 goto err_destroy_ff;
349 }
350
351 platform_set_drvdata(pdev, chip);
352 return 0;
353
354err_destroy_ff:
355 input_ff_destroy(input_dev);
356err_put_regulator:
357 regulator_put(chip->regulator);
358err_free_pwm:
359 if (chip->mode == MAX8997_EXTERNAL_MODE)
360 pwm_free(chip->pwm);
361err_free_mem:
362 input_free_device(input_dev);
363 kfree(chip);
364
365 return error;
366}
367
368static int max8997_haptic_remove(struct platform_device *pdev)
369{
370 struct max8997_haptic *chip = platform_get_drvdata(pdev);
371
372 input_unregister_device(chip->input_dev);
373 regulator_put(chip->regulator);
374
375 if (chip->mode == MAX8997_EXTERNAL_MODE)
376 pwm_free(chip->pwm);
377
378 kfree(chip);
379
380 return 0;
381}
382
383static int __maybe_unused max8997_haptic_suspend(struct device *dev)
384{
385 struct platform_device *pdev = to_platform_device(dev);
386 struct max8997_haptic *chip = platform_get_drvdata(pdev);
387
388 max8997_haptic_disable(chip);
389
390 return 0;
391}
392
393static SIMPLE_DEV_PM_OPS(max8997_haptic_pm_ops, max8997_haptic_suspend, NULL);
394
395static const struct platform_device_id max8997_haptic_id[] = {
396 { "max8997-haptic", 0 },
397 { },
398};
399MODULE_DEVICE_TABLE(platform, max8997_haptic_id);
400
401static struct platform_driver max8997_haptic_driver = {
402 .driver = {
403 .name = "max8997-haptic",
404 .pm = &max8997_haptic_pm_ops,
405 },
406 .probe = max8997_haptic_probe,
407 .remove = max8997_haptic_remove,
408 .id_table = max8997_haptic_id,
409};
410module_platform_driver(max8997_haptic_driver);
411
412MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
413MODULE_DESCRIPTION("max8997_haptic driver");
414MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * MAX8997-haptic controller driver
4 *
5 * Copyright (C) 2012 Samsung Electronics
6 * Donggeun Kim <dg77.kim@samsung.com>
7 *
8 * This program is not provided / owned by Maxim Integrated Products.
9 */
10
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/platform_device.h>
14#include <linux/err.h>
15#include <linux/pwm.h>
16#include <linux/input.h>
17#include <linux/mfd/max8997-private.h>
18#include <linux/mfd/max8997.h>
19#include <linux/regulator/consumer.h>
20
21/* Haptic configuration 2 register */
22#define MAX8997_MOTOR_TYPE_SHIFT 7
23#define MAX8997_ENABLE_SHIFT 6
24#define MAX8997_MODE_SHIFT 5
25
26/* Haptic driver configuration register */
27#define MAX8997_CYCLE_SHIFT 6
28#define MAX8997_SIG_PERIOD_SHIFT 4
29#define MAX8997_SIG_DUTY_SHIFT 2
30#define MAX8997_PWM_DUTY_SHIFT 0
31
32struct max8997_haptic {
33 struct device *dev;
34 struct i2c_client *client;
35 struct input_dev *input_dev;
36 struct regulator *regulator;
37
38 struct work_struct work;
39 struct mutex mutex;
40
41 bool enabled;
42 unsigned int level;
43
44 struct pwm_device *pwm;
45 unsigned int pwm_period;
46 enum max8997_haptic_pwm_divisor pwm_divisor;
47
48 enum max8997_haptic_motor_type type;
49 enum max8997_haptic_pulse_mode mode;
50
51 unsigned int internal_mode_pattern;
52 unsigned int pattern_cycle;
53 unsigned int pattern_signal_period;
54};
55
56static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip)
57{
58 int ret = 0;
59
60 if (chip->mode == MAX8997_EXTERNAL_MODE) {
61 unsigned int duty = chip->pwm_period * chip->level / 100;
62 ret = pwm_config(chip->pwm, duty, chip->pwm_period);
63 } else {
64 u8 duty_index = 0;
65
66 duty_index = DIV_ROUND_UP(chip->level * 64, 100);
67
68 switch (chip->internal_mode_pattern) {
69 case 0:
70 max8997_write_reg(chip->client,
71 MAX8997_HAPTIC_REG_SIGPWMDC1, duty_index);
72 break;
73 case 1:
74 max8997_write_reg(chip->client,
75 MAX8997_HAPTIC_REG_SIGPWMDC2, duty_index);
76 break;
77 case 2:
78 max8997_write_reg(chip->client,
79 MAX8997_HAPTIC_REG_SIGPWMDC3, duty_index);
80 break;
81 case 3:
82 max8997_write_reg(chip->client,
83 MAX8997_HAPTIC_REG_SIGPWMDC4, duty_index);
84 break;
85 default:
86 break;
87 }
88 }
89 return ret;
90}
91
92static void max8997_haptic_configure(struct max8997_haptic *chip)
93{
94 u8 value;
95
96 value = chip->type << MAX8997_MOTOR_TYPE_SHIFT |
97 chip->enabled << MAX8997_ENABLE_SHIFT |
98 chip->mode << MAX8997_MODE_SHIFT | chip->pwm_divisor;
99 max8997_write_reg(chip->client, MAX8997_HAPTIC_REG_CONF2, value);
100
101 if (chip->mode == MAX8997_INTERNAL_MODE && chip->enabled) {
102 value = chip->internal_mode_pattern << MAX8997_CYCLE_SHIFT |
103 chip->internal_mode_pattern << MAX8997_SIG_PERIOD_SHIFT |
104 chip->internal_mode_pattern << MAX8997_SIG_DUTY_SHIFT |
105 chip->internal_mode_pattern << MAX8997_PWM_DUTY_SHIFT;
106 max8997_write_reg(chip->client,
107 MAX8997_HAPTIC_REG_DRVCONF, value);
108
109 switch (chip->internal_mode_pattern) {
110 case 0:
111 value = chip->pattern_cycle << 4;
112 max8997_write_reg(chip->client,
113 MAX8997_HAPTIC_REG_CYCLECONF1, value);
114 value = chip->pattern_signal_period;
115 max8997_write_reg(chip->client,
116 MAX8997_HAPTIC_REG_SIGCONF1, value);
117 break;
118
119 case 1:
120 value = chip->pattern_cycle;
121 max8997_write_reg(chip->client,
122 MAX8997_HAPTIC_REG_CYCLECONF1, value);
123 value = chip->pattern_signal_period;
124 max8997_write_reg(chip->client,
125 MAX8997_HAPTIC_REG_SIGCONF2, value);
126 break;
127
128 case 2:
129 value = chip->pattern_cycle << 4;
130 max8997_write_reg(chip->client,
131 MAX8997_HAPTIC_REG_CYCLECONF2, value);
132 value = chip->pattern_signal_period;
133 max8997_write_reg(chip->client,
134 MAX8997_HAPTIC_REG_SIGCONF3, value);
135 break;
136
137 case 3:
138 value = chip->pattern_cycle;
139 max8997_write_reg(chip->client,
140 MAX8997_HAPTIC_REG_CYCLECONF2, value);
141 value = chip->pattern_signal_period;
142 max8997_write_reg(chip->client,
143 MAX8997_HAPTIC_REG_SIGCONF4, value);
144 break;
145
146 default:
147 break;
148 }
149 }
150}
151
152static void max8997_haptic_enable(struct max8997_haptic *chip)
153{
154 int error;
155
156 mutex_lock(&chip->mutex);
157
158 error = max8997_haptic_set_duty_cycle(chip);
159 if (error) {
160 dev_err(chip->dev, "set_pwm_cycle failed, error: %d\n", error);
161 goto out;
162 }
163
164 if (!chip->enabled) {
165 error = regulator_enable(chip->regulator);
166 if (error) {
167 dev_err(chip->dev, "Failed to enable regulator\n");
168 goto out;
169 }
170 max8997_haptic_configure(chip);
171 if (chip->mode == MAX8997_EXTERNAL_MODE) {
172 error = pwm_enable(chip->pwm);
173 if (error) {
174 dev_err(chip->dev, "Failed to enable PWM\n");
175 regulator_disable(chip->regulator);
176 goto out;
177 }
178 }
179 chip->enabled = true;
180 }
181
182out:
183 mutex_unlock(&chip->mutex);
184}
185
186static void max8997_haptic_disable(struct max8997_haptic *chip)
187{
188 mutex_lock(&chip->mutex);
189
190 if (chip->enabled) {
191 chip->enabled = false;
192 max8997_haptic_configure(chip);
193 if (chip->mode == MAX8997_EXTERNAL_MODE)
194 pwm_disable(chip->pwm);
195 regulator_disable(chip->regulator);
196 }
197
198 mutex_unlock(&chip->mutex);
199}
200
201static void max8997_haptic_play_effect_work(struct work_struct *work)
202{
203 struct max8997_haptic *chip =
204 container_of(work, struct max8997_haptic, work);
205
206 if (chip->level)
207 max8997_haptic_enable(chip);
208 else
209 max8997_haptic_disable(chip);
210}
211
212static int max8997_haptic_play_effect(struct input_dev *dev, void *data,
213 struct ff_effect *effect)
214{
215 struct max8997_haptic *chip = input_get_drvdata(dev);
216
217 chip->level = effect->u.rumble.strong_magnitude;
218 if (!chip->level)
219 chip->level = effect->u.rumble.weak_magnitude;
220
221 schedule_work(&chip->work);
222
223 return 0;
224}
225
226static void max8997_haptic_close(struct input_dev *dev)
227{
228 struct max8997_haptic *chip = input_get_drvdata(dev);
229
230 cancel_work_sync(&chip->work);
231 max8997_haptic_disable(chip);
232}
233
234static int max8997_haptic_probe(struct platform_device *pdev)
235{
236 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
237 const struct max8997_platform_data *pdata =
238 dev_get_platdata(iodev->dev);
239 const struct max8997_haptic_platform_data *haptic_pdata = NULL;
240 struct max8997_haptic *chip;
241 struct input_dev *input_dev;
242 int error;
243
244 if (pdata)
245 haptic_pdata = pdata->haptic_pdata;
246
247 if (!haptic_pdata) {
248 dev_err(&pdev->dev, "no haptic platform data\n");
249 return -EINVAL;
250 }
251
252 chip = kzalloc(sizeof(struct max8997_haptic), GFP_KERNEL);
253 input_dev = input_allocate_device();
254 if (!chip || !input_dev) {
255 dev_err(&pdev->dev, "unable to allocate memory\n");
256 error = -ENOMEM;
257 goto err_free_mem;
258 }
259
260 INIT_WORK(&chip->work, max8997_haptic_play_effect_work);
261 mutex_init(&chip->mutex);
262
263 chip->client = iodev->haptic;
264 chip->dev = &pdev->dev;
265 chip->input_dev = input_dev;
266 chip->pwm_period = haptic_pdata->pwm_period;
267 chip->type = haptic_pdata->type;
268 chip->mode = haptic_pdata->mode;
269 chip->pwm_divisor = haptic_pdata->pwm_divisor;
270
271 switch (chip->mode) {
272 case MAX8997_INTERNAL_MODE:
273 chip->internal_mode_pattern =
274 haptic_pdata->internal_mode_pattern;
275 chip->pattern_cycle = haptic_pdata->pattern_cycle;
276 chip->pattern_signal_period =
277 haptic_pdata->pattern_signal_period;
278 break;
279
280 case MAX8997_EXTERNAL_MODE:
281 chip->pwm = pwm_get(&pdev->dev, NULL);
282 if (IS_ERR(chip->pwm)) {
283 error = PTR_ERR(chip->pwm);
284 dev_err(&pdev->dev,
285 "unable to request PWM for haptic, error: %d\n",
286 error);
287 goto err_free_mem;
288 }
289
290 /*
291 * FIXME: pwm_apply_args() should be removed when switching to
292 * the atomic PWM API.
293 */
294 pwm_apply_args(chip->pwm);
295 break;
296
297 default:
298 dev_err(&pdev->dev,
299 "Invalid chip mode specified (%d)\n", chip->mode);
300 error = -EINVAL;
301 goto err_free_mem;
302 }
303
304 chip->regulator = regulator_get(&pdev->dev, "inmotor");
305 if (IS_ERR(chip->regulator)) {
306 error = PTR_ERR(chip->regulator);
307 dev_err(&pdev->dev,
308 "unable to get regulator, error: %d\n",
309 error);
310 goto err_free_pwm;
311 }
312
313 input_dev->name = "max8997-haptic";
314 input_dev->id.version = 1;
315 input_dev->dev.parent = &pdev->dev;
316 input_dev->close = max8997_haptic_close;
317 input_set_drvdata(input_dev, chip);
318 input_set_capability(input_dev, EV_FF, FF_RUMBLE);
319
320 error = input_ff_create_memless(input_dev, NULL,
321 max8997_haptic_play_effect);
322 if (error) {
323 dev_err(&pdev->dev,
324 "unable to create FF device, error: %d\n",
325 error);
326 goto err_put_regulator;
327 }
328
329 error = input_register_device(input_dev);
330 if (error) {
331 dev_err(&pdev->dev,
332 "unable to register input device, error: %d\n",
333 error);
334 goto err_destroy_ff;
335 }
336
337 platform_set_drvdata(pdev, chip);
338 return 0;
339
340err_destroy_ff:
341 input_ff_destroy(input_dev);
342err_put_regulator:
343 regulator_put(chip->regulator);
344err_free_pwm:
345 if (chip->mode == MAX8997_EXTERNAL_MODE)
346 pwm_put(chip->pwm);
347err_free_mem:
348 input_free_device(input_dev);
349 kfree(chip);
350
351 return error;
352}
353
354static void max8997_haptic_remove(struct platform_device *pdev)
355{
356 struct max8997_haptic *chip = platform_get_drvdata(pdev);
357
358 input_unregister_device(chip->input_dev);
359 regulator_put(chip->regulator);
360
361 if (chip->mode == MAX8997_EXTERNAL_MODE)
362 pwm_put(chip->pwm);
363
364 kfree(chip);
365}
366
367static int max8997_haptic_suspend(struct device *dev)
368{
369 struct platform_device *pdev = to_platform_device(dev);
370 struct max8997_haptic *chip = platform_get_drvdata(pdev);
371
372 max8997_haptic_disable(chip);
373
374 return 0;
375}
376
377static DEFINE_SIMPLE_DEV_PM_OPS(max8997_haptic_pm_ops,
378 max8997_haptic_suspend, NULL);
379
380static const struct platform_device_id max8997_haptic_id[] = {
381 { "max8997-haptic", 0 },
382 { },
383};
384MODULE_DEVICE_TABLE(platform, max8997_haptic_id);
385
386static struct platform_driver max8997_haptic_driver = {
387 .driver = {
388 .name = "max8997-haptic",
389 .pm = pm_sleep_ptr(&max8997_haptic_pm_ops),
390 },
391 .probe = max8997_haptic_probe,
392 .remove_new = max8997_haptic_remove,
393 .id_table = max8997_haptic_id,
394};
395module_platform_driver(max8997_haptic_driver);
396
397MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
398MODULE_DESCRIPTION("max8997_haptic driver");
399MODULE_LICENSE("GPL");