Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 14 | |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/hrtimer.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/leds.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/mutex.h> |
| 22 | #include <linux/of_device.h> |
| 23 | #include <linux/regmap.h> |
| 24 | #include <linux/workqueue.h> |
| 25 | |
| 26 | /* Vibrator-LDO register definitions */ |
| 27 | #define QPNP_VIB_LDO_REG_STATUS1 0x08 |
| 28 | #define QPNP_VIB_LDO_VREG_READY BIT(7) |
| 29 | |
| 30 | #define QPNP_VIB_LDO_REG_VSET_LB 0x40 |
| 31 | |
| 32 | #define QPNP_VIB_LDO_REG_EN_CTL 0x46 |
| 33 | #define QPNP_VIB_LDO_EN BIT(7) |
| 34 | |
| 35 | /* Vibrator-LDO voltage settings */ |
| 36 | #define QPNP_VIB_LDO_VMIN_UV 1504000 |
| 37 | #define QPNP_VIB_LDO_VMAX_UV 3544000 |
| 38 | #define QPNP_VIB_LDO_VOLT_STEP_UV 8000 |
| 39 | |
| 40 | /* |
| 41 | * Define vibration periods: default(5sec), min(50ms), max(15sec) and |
| 42 | * overdrive(30ms). |
| 43 | */ |
| 44 | #define QPNP_VIB_MIN_PLAY_MS 50 |
| 45 | #define QPNP_VIB_PLAY_MS 5000 |
| 46 | #define QPNP_VIB_MAX_PLAY_MS 15000 |
| 47 | #define QPNP_VIB_OVERDRIVE_PLAY_MS 30 |
| 48 | |
| 49 | struct vib_ldo_chip { |
| 50 | struct led_classdev cdev; |
| 51 | struct regmap *regmap; |
| 52 | struct mutex lock; |
| 53 | struct hrtimer stop_timer; |
| 54 | struct hrtimer overdrive_timer; |
| 55 | struct work_struct vib_work; |
| 56 | struct work_struct overdrive_work; |
| 57 | |
| 58 | u16 base; |
| 59 | int vmax_uV; |
| 60 | int overdrive_volt_uV; |
| 61 | int ldo_uV; |
| 62 | int state; |
| 63 | u64 vib_play_ms; |
| 64 | bool vib_enabled; |
| 65 | bool disable_overdrive; |
| 66 | }; |
| 67 | |
Tirupathi Reddy | 638d5f0 | 2018-06-12 09:11:27 +0530 | [diff] [blame] | 68 | static inline int qpnp_vib_ldo_poll_status(struct vib_ldo_chip *chip) |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 69 | { |
| 70 | unsigned int val; |
Tirupathi Reddy | 638d5f0 | 2018-06-12 09:11:27 +0530 | [diff] [blame] | 71 | int ret; |
| 72 | |
| 73 | ret = regmap_read_poll_timeout(chip->regmap, |
| 74 | chip->base + QPNP_VIB_LDO_REG_STATUS1, val, |
| 75 | val & QPNP_VIB_LDO_VREG_READY, 100, 1000); |
| 76 | if (ret < 0) { |
| 77 | pr_err("Vibrator LDO vreg_ready timeout, status=0x%02x, ret=%d\n", |
| 78 | val, ret); |
| 79 | |
| 80 | /* Keep VIB_LDO disabled */ |
| 81 | regmap_update_bits(chip->regmap, |
| 82 | chip->base + QPNP_VIB_LDO_REG_EN_CTL, |
| 83 | QPNP_VIB_LDO_EN, 0); |
| 84 | } |
| 85 | |
| 86 | return ret; |
| 87 | } |
| 88 | |
| 89 | static int qpnp_vib_ldo_set_voltage(struct vib_ldo_chip *chip, int new_uV) |
| 90 | { |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 91 | u32 vlevel; |
| 92 | u8 reg[2]; |
| 93 | int ret; |
| 94 | |
| 95 | if (chip->ldo_uV == new_uV) |
| 96 | return 0; |
| 97 | |
| 98 | vlevel = roundup(new_uV, QPNP_VIB_LDO_VOLT_STEP_UV) / 1000; |
| 99 | reg[0] = vlevel & 0xff; |
| 100 | reg[1] = (vlevel & 0xff00) >> 8; |
| 101 | ret = regmap_bulk_write(chip->regmap, |
| 102 | chip->base + QPNP_VIB_LDO_REG_VSET_LB, reg, 2); |
| 103 | if (ret < 0) { |
| 104 | pr_err("regmap write failed, ret=%d\n", ret); |
| 105 | return ret; |
| 106 | } |
| 107 | |
| 108 | if (chip->vib_enabled) { |
Tirupathi Reddy | 638d5f0 | 2018-06-12 09:11:27 +0530 | [diff] [blame] | 109 | ret = qpnp_vib_ldo_poll_status(chip); |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 110 | if (ret < 0) { |
Tirupathi Reddy | 638d5f0 | 2018-06-12 09:11:27 +0530 | [diff] [blame] | 111 | pr_err("Vibrator LDO status polling timedout\n"); |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 112 | return ret; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | chip->ldo_uV = new_uV; |
| 117 | return ret; |
| 118 | } |
| 119 | |
| 120 | static inline int qpnp_vib_ldo_enable(struct vib_ldo_chip *chip, bool enable) |
| 121 | { |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 122 | int ret; |
| 123 | |
| 124 | if (chip->vib_enabled == enable) |
| 125 | return 0; |
| 126 | |
| 127 | ret = regmap_update_bits(chip->regmap, |
| 128 | chip->base + QPNP_VIB_LDO_REG_EN_CTL, |
| 129 | QPNP_VIB_LDO_EN, |
| 130 | enable ? QPNP_VIB_LDO_EN : 0); |
| 131 | if (ret < 0) { |
| 132 | pr_err("Program Vibrator LDO %s is failed, ret=%d\n", |
| 133 | enable ? "enable" : "disable", ret); |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | if (enable) { |
Tirupathi Reddy | 638d5f0 | 2018-06-12 09:11:27 +0530 | [diff] [blame] | 138 | ret = qpnp_vib_ldo_poll_status(chip); |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 139 | if (ret < 0) { |
Tirupathi Reddy | 638d5f0 | 2018-06-12 09:11:27 +0530 | [diff] [blame] | 140 | pr_err("Vibrator LDO status polling timedout\n"); |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 141 | return ret; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | chip->vib_enabled = enable; |
| 146 | |
| 147 | return ret; |
| 148 | } |
| 149 | |
| 150 | static int qpnp_vibrator_play_on(struct vib_ldo_chip *chip) |
| 151 | { |
| 152 | int volt_uV; |
| 153 | int ret; |
| 154 | |
| 155 | volt_uV = chip->vmax_uV; |
| 156 | if (!chip->disable_overdrive) |
| 157 | volt_uV = chip->overdrive_volt_uV ? chip->overdrive_volt_uV |
| 158 | : min(chip->vmax_uV * 2, QPNP_VIB_LDO_VMAX_UV); |
| 159 | |
| 160 | ret = qpnp_vib_ldo_set_voltage(chip, volt_uV); |
| 161 | if (ret < 0) { |
| 162 | pr_err("set voltage = %duV failed, ret=%d\n", volt_uV, ret); |
| 163 | return ret; |
| 164 | } |
| 165 | pr_debug("voltage set to %d uV\n", volt_uV); |
| 166 | |
| 167 | ret = qpnp_vib_ldo_enable(chip, true); |
| 168 | if (ret < 0) { |
| 169 | pr_err("vibration enable failed, ret=%d\n", ret); |
| 170 | return ret; |
| 171 | } |
| 172 | |
| 173 | if (!chip->disable_overdrive) |
| 174 | hrtimer_start(&chip->overdrive_timer, |
| 175 | ms_to_ktime(QPNP_VIB_OVERDRIVE_PLAY_MS), |
| 176 | HRTIMER_MODE_REL); |
| 177 | |
| 178 | return ret; |
| 179 | } |
| 180 | |
| 181 | static void qpnp_vib_work(struct work_struct *work) |
| 182 | { |
| 183 | struct vib_ldo_chip *chip = container_of(work, struct vib_ldo_chip, |
| 184 | vib_work); |
| 185 | int ret = 0; |
| 186 | |
| 187 | if (chip->state) { |
| 188 | if (!chip->vib_enabled) |
| 189 | ret = qpnp_vibrator_play_on(chip); |
| 190 | |
| 191 | if (ret == 0) |
| 192 | hrtimer_start(&chip->stop_timer, |
| 193 | ms_to_ktime(chip->vib_play_ms), |
| 194 | HRTIMER_MODE_REL); |
| 195 | } else { |
| 196 | if (!chip->disable_overdrive) { |
| 197 | hrtimer_cancel(&chip->overdrive_timer); |
| 198 | cancel_work_sync(&chip->overdrive_work); |
| 199 | } |
| 200 | qpnp_vib_ldo_enable(chip, false); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | static enum hrtimer_restart vib_stop_timer(struct hrtimer *timer) |
| 205 | { |
| 206 | struct vib_ldo_chip *chip = container_of(timer, struct vib_ldo_chip, |
| 207 | stop_timer); |
| 208 | |
| 209 | chip->state = 0; |
| 210 | schedule_work(&chip->vib_work); |
| 211 | return HRTIMER_NORESTART; |
| 212 | } |
| 213 | |
| 214 | static void qpnp_vib_overdrive_work(struct work_struct *work) |
| 215 | { |
| 216 | struct vib_ldo_chip *chip = container_of(work, struct vib_ldo_chip, |
| 217 | overdrive_work); |
| 218 | int ret; |
| 219 | |
| 220 | mutex_lock(&chip->lock); |
| 221 | |
| 222 | /* LDO voltage update not required if Vibration disabled */ |
| 223 | if (!chip->vib_enabled) |
| 224 | goto unlock; |
| 225 | |
| 226 | ret = qpnp_vib_ldo_set_voltage(chip, chip->vmax_uV); |
| 227 | if (ret < 0) { |
| 228 | pr_err("set vibration voltage = %duV failed, ret=%d\n", |
| 229 | chip->vmax_uV, ret); |
| 230 | qpnp_vib_ldo_enable(chip, false); |
| 231 | goto unlock; |
| 232 | } |
| 233 | pr_debug("voltage set to %d\n", chip->vmax_uV); |
| 234 | |
| 235 | unlock: |
| 236 | mutex_unlock(&chip->lock); |
| 237 | } |
| 238 | |
| 239 | static enum hrtimer_restart vib_overdrive_timer(struct hrtimer *timer) |
| 240 | { |
| 241 | struct vib_ldo_chip *chip = container_of(timer, struct vib_ldo_chip, |
| 242 | overdrive_timer); |
| 243 | schedule_work(&chip->overdrive_work); |
| 244 | pr_debug("overdrive timer expired\n"); |
| 245 | return HRTIMER_NORESTART; |
| 246 | } |
| 247 | |
| 248 | static ssize_t qpnp_vib_show_state(struct device *dev, |
| 249 | struct device_attribute *attr, char *buf) |
| 250 | { |
| 251 | struct led_classdev *cdev = dev_get_drvdata(dev); |
| 252 | struct vib_ldo_chip *chip = container_of(cdev, struct vib_ldo_chip, |
| 253 | cdev); |
| 254 | |
| 255 | return snprintf(buf, PAGE_SIZE, "%d\n", chip->vib_enabled); |
| 256 | } |
| 257 | |
| 258 | static ssize_t qpnp_vib_store_state(struct device *dev, |
| 259 | struct device_attribute *attr, const char *buf, size_t count) |
| 260 | { |
| 261 | /* At present, nothing to do with setting state */ |
| 262 | return count; |
| 263 | } |
| 264 | |
| 265 | static ssize_t qpnp_vib_show_duration(struct device *dev, |
| 266 | struct device_attribute *attr, char *buf) |
| 267 | { |
| 268 | struct led_classdev *cdev = dev_get_drvdata(dev); |
| 269 | struct vib_ldo_chip *chip = container_of(cdev, struct vib_ldo_chip, |
| 270 | cdev); |
| 271 | ktime_t time_rem; |
| 272 | s64 time_ms = 0; |
| 273 | |
| 274 | if (hrtimer_active(&chip->stop_timer)) { |
| 275 | time_rem = hrtimer_get_remaining(&chip->stop_timer); |
| 276 | time_ms = ktime_to_ms(time_rem); |
| 277 | } |
| 278 | |
| 279 | return snprintf(buf, PAGE_SIZE, "%lld\n", time_ms); |
| 280 | } |
| 281 | |
| 282 | static ssize_t qpnp_vib_store_duration(struct device *dev, |
| 283 | struct device_attribute *attr, const char *buf, size_t count) |
| 284 | { |
| 285 | struct led_classdev *cdev = dev_get_drvdata(dev); |
| 286 | struct vib_ldo_chip *chip = container_of(cdev, struct vib_ldo_chip, |
| 287 | cdev); |
| 288 | u32 val; |
| 289 | int ret; |
| 290 | |
| 291 | ret = kstrtouint(buf, 0, &val); |
| 292 | if (ret < 0) |
| 293 | return ret; |
| 294 | |
| 295 | /* setting 0 on duration is NOP for now */ |
| 296 | if (val <= 0) |
| 297 | return count; |
| 298 | |
| 299 | if (val < QPNP_VIB_MIN_PLAY_MS) |
| 300 | val = QPNP_VIB_MIN_PLAY_MS; |
| 301 | |
| 302 | if (val > QPNP_VIB_MAX_PLAY_MS) |
| 303 | val = QPNP_VIB_MAX_PLAY_MS; |
| 304 | |
| 305 | mutex_lock(&chip->lock); |
| 306 | chip->vib_play_ms = val; |
| 307 | mutex_unlock(&chip->lock); |
| 308 | |
| 309 | return count; |
| 310 | } |
| 311 | |
| 312 | static ssize_t qpnp_vib_show_activate(struct device *dev, |
| 313 | struct device_attribute *attr, char *buf) |
| 314 | { |
| 315 | /* For now nothing to show */ |
| 316 | return snprintf(buf, PAGE_SIZE, "%d\n", 0); |
| 317 | } |
| 318 | |
| 319 | static ssize_t qpnp_vib_store_activate(struct device *dev, |
| 320 | struct device_attribute *attr, const char *buf, size_t count) |
| 321 | { |
| 322 | struct led_classdev *cdev = dev_get_drvdata(dev); |
| 323 | struct vib_ldo_chip *chip = container_of(cdev, struct vib_ldo_chip, |
| 324 | cdev); |
| 325 | u32 val; |
| 326 | int ret; |
| 327 | |
| 328 | ret = kstrtouint(buf, 0, &val); |
| 329 | if (ret < 0) |
| 330 | return ret; |
| 331 | |
| 332 | if (val != 0 && val != 1) |
| 333 | return count; |
| 334 | |
| 335 | mutex_lock(&chip->lock); |
| 336 | hrtimer_cancel(&chip->stop_timer); |
| 337 | chip->state = val; |
| 338 | pr_debug("state = %d, time = %llums\n", chip->state, chip->vib_play_ms); |
| 339 | mutex_unlock(&chip->lock); |
| 340 | schedule_work(&chip->vib_work); |
| 341 | |
| 342 | return count; |
| 343 | } |
| 344 | |
| 345 | static ssize_t qpnp_vib_show_vmax(struct device *dev, |
| 346 | struct device_attribute *attr, char *buf) |
| 347 | { |
| 348 | struct led_classdev *cdev = dev_get_drvdata(dev); |
| 349 | struct vib_ldo_chip *chip = container_of(cdev, struct vib_ldo_chip, |
| 350 | cdev); |
| 351 | |
| 352 | return snprintf(buf, PAGE_SIZE, "%d\n", chip->vmax_uV / 1000); |
| 353 | } |
| 354 | |
| 355 | static ssize_t qpnp_vib_store_vmax(struct device *dev, |
| 356 | struct device_attribute *attr, const char *buf, size_t count) |
| 357 | { |
| 358 | struct led_classdev *cdev = dev_get_drvdata(dev); |
| 359 | struct vib_ldo_chip *chip = container_of(cdev, struct vib_ldo_chip, |
| 360 | cdev); |
| 361 | int data, ret; |
| 362 | |
| 363 | ret = kstrtoint(buf, 10, &data); |
| 364 | if (ret < 0) |
| 365 | return ret; |
| 366 | |
| 367 | data = data * 1000; /* Convert to microvolts */ |
| 368 | |
| 369 | /* check against vibrator ldo min/max voltage limits */ |
| 370 | data = min(data, QPNP_VIB_LDO_VMAX_UV); |
| 371 | data = max(data, QPNP_VIB_LDO_VMIN_UV); |
| 372 | |
| 373 | mutex_lock(&chip->lock); |
| 374 | chip->vmax_uV = data; |
| 375 | mutex_unlock(&chip->lock); |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | static struct device_attribute qpnp_vib_attrs[] = { |
| 380 | __ATTR(state, 0664, qpnp_vib_show_state, qpnp_vib_store_state), |
| 381 | __ATTR(duration, 0664, qpnp_vib_show_duration, qpnp_vib_store_duration), |
| 382 | __ATTR(activate, 0664, qpnp_vib_show_activate, qpnp_vib_store_activate), |
| 383 | __ATTR(vmax_mv, 0664, qpnp_vib_show_vmax, qpnp_vib_store_vmax), |
| 384 | }; |
| 385 | |
| 386 | static int qpnp_vib_parse_dt(struct device *dev, struct vib_ldo_chip *chip) |
| 387 | { |
| 388 | int ret; |
| 389 | |
| 390 | ret = of_property_read_u32(dev->of_node, "qcom,vib-ldo-volt-uv", |
| 391 | &chip->vmax_uV); |
| 392 | if (ret < 0) { |
| 393 | pr_err("qcom,vib-ldo-volt-uv property read failed, ret=%d\n", |
| 394 | ret); |
| 395 | return ret; |
| 396 | } |
| 397 | |
| 398 | chip->disable_overdrive = of_property_read_bool(dev->of_node, |
| 399 | "qcom,disable-overdrive"); |
| 400 | |
| 401 | if (of_find_property(dev->of_node, "qcom,vib-overdrive-volt-uv", |
| 402 | NULL)) { |
| 403 | ret = of_property_read_u32(dev->of_node, |
| 404 | "qcom,vib-overdrive-volt-uv", |
| 405 | &chip->overdrive_volt_uV); |
| 406 | if (ret < 0) { |
| 407 | pr_err("qcom,vib-overdrive-volt-uv property read failed, ret=%d\n", |
| 408 | ret); |
| 409 | return ret; |
| 410 | } |
| 411 | |
| 412 | /* check against vibrator ldo min/max voltage limits */ |
| 413 | chip->overdrive_volt_uV = min(chip->overdrive_volt_uV, |
| 414 | QPNP_VIB_LDO_VMAX_UV); |
| 415 | chip->overdrive_volt_uV = max(chip->overdrive_volt_uV, |
| 416 | QPNP_VIB_LDO_VMIN_UV); |
| 417 | } |
| 418 | |
| 419 | return ret; |
| 420 | } |
| 421 | |
| 422 | /* Dummy functions for brightness */ |
| 423 | static enum led_brightness qpnp_vib_brightness_get(struct led_classdev *cdev) |
| 424 | { |
| 425 | return 0; |
| 426 | } |
| 427 | |
| 428 | static void qpnp_vib_brightness_set(struct led_classdev *cdev, |
| 429 | enum led_brightness level) |
| 430 | { |
| 431 | } |
| 432 | |
| 433 | static int qpnp_vibrator_ldo_suspend(struct device *dev) |
| 434 | { |
| 435 | struct vib_ldo_chip *chip = dev_get_drvdata(dev); |
| 436 | |
| 437 | mutex_lock(&chip->lock); |
| 438 | if (!chip->disable_overdrive) { |
| 439 | hrtimer_cancel(&chip->overdrive_timer); |
| 440 | cancel_work_sync(&chip->overdrive_work); |
| 441 | } |
| 442 | hrtimer_cancel(&chip->stop_timer); |
| 443 | cancel_work_sync(&chip->vib_work); |
Tirupathi Reddy | d2c8b93 | 2018-06-18 13:10:55 +0530 | [diff] [blame] | 444 | qpnp_vib_ldo_enable(chip, false); |
Tirupathi Reddy | 9722c56 | 2017-11-28 12:41:59 +0530 | [diff] [blame] | 445 | mutex_unlock(&chip->lock); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | static SIMPLE_DEV_PM_OPS(qpnp_vibrator_ldo_pm_ops, qpnp_vibrator_ldo_suspend, |
| 450 | NULL); |
| 451 | |
| 452 | static int qpnp_vibrator_ldo_probe(struct platform_device *pdev) |
| 453 | { |
| 454 | struct device_node *of_node = pdev->dev.of_node; |
| 455 | struct vib_ldo_chip *chip; |
| 456 | int i, ret; |
| 457 | u32 base; |
| 458 | |
| 459 | ret = of_property_read_u32(of_node, "reg", &base); |
| 460 | if (ret < 0) { |
| 461 | pr_err("reg property reading failed, ret=%d\n", ret); |
| 462 | return ret; |
| 463 | } |
| 464 | |
| 465 | chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); |
| 466 | if (!chip) |
| 467 | return -ENOMEM; |
| 468 | |
| 469 | chip->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
| 470 | if (!chip->regmap) { |
| 471 | pr_err("couldn't get parent's regmap\n"); |
| 472 | return -EINVAL; |
| 473 | } |
| 474 | |
| 475 | ret = qpnp_vib_parse_dt(&pdev->dev, chip); |
| 476 | if (ret < 0) { |
| 477 | pr_err("couldn't parse device tree, ret=%d\n", ret); |
| 478 | return ret; |
| 479 | } |
| 480 | |
| 481 | chip->base = (uint16_t)base; |
| 482 | chip->vib_play_ms = QPNP_VIB_PLAY_MS; |
| 483 | mutex_init(&chip->lock); |
| 484 | INIT_WORK(&chip->vib_work, qpnp_vib_work); |
| 485 | INIT_WORK(&chip->overdrive_work, qpnp_vib_overdrive_work); |
| 486 | |
| 487 | hrtimer_init(&chip->stop_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 488 | chip->stop_timer.function = vib_stop_timer; |
| 489 | hrtimer_init(&chip->overdrive_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 490 | chip->overdrive_timer.function = vib_overdrive_timer; |
| 491 | dev_set_drvdata(&pdev->dev, chip); |
| 492 | |
| 493 | chip->cdev.name = "vibrator"; |
| 494 | chip->cdev.brightness_get = qpnp_vib_brightness_get; |
| 495 | chip->cdev.brightness_set = qpnp_vib_brightness_set; |
| 496 | chip->cdev.max_brightness = 100; |
| 497 | ret = devm_led_classdev_register(&pdev->dev, &chip->cdev); |
| 498 | if (ret < 0) { |
| 499 | pr_err("Error in registering led class device, ret=%d\n", ret); |
| 500 | goto fail; |
| 501 | } |
| 502 | |
| 503 | for (i = 0; i < ARRAY_SIZE(qpnp_vib_attrs); i++) { |
| 504 | ret = sysfs_create_file(&chip->cdev.dev->kobj, |
| 505 | &qpnp_vib_attrs[i].attr); |
| 506 | if (ret < 0) { |
| 507 | dev_err(&pdev->dev, "Error in creating sysfs file, ret=%d\n", |
| 508 | ret); |
| 509 | goto sysfs_fail; |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | pr_info("Vibrator LDO successfully registered: uV = %d, overdrive = %s\n", |
| 514 | chip->vmax_uV, |
| 515 | chip->disable_overdrive ? "disabled" : "enabled"); |
| 516 | return 0; |
| 517 | |
| 518 | sysfs_fail: |
| 519 | for (--i; i >= 0; i--) |
| 520 | sysfs_remove_file(&chip->cdev.dev->kobj, |
| 521 | &qpnp_vib_attrs[i].attr); |
| 522 | fail: |
| 523 | mutex_destroy(&chip->lock); |
| 524 | dev_set_drvdata(&pdev->dev, NULL); |
| 525 | return ret; |
| 526 | } |
| 527 | |
| 528 | static int qpnp_vibrator_ldo_remove(struct platform_device *pdev) |
| 529 | { |
| 530 | struct vib_ldo_chip *chip = dev_get_drvdata(&pdev->dev); |
| 531 | |
| 532 | if (!chip->disable_overdrive) { |
| 533 | hrtimer_cancel(&chip->overdrive_timer); |
| 534 | cancel_work_sync(&chip->overdrive_work); |
| 535 | } |
| 536 | hrtimer_cancel(&chip->stop_timer); |
| 537 | cancel_work_sync(&chip->vib_work); |
| 538 | mutex_destroy(&chip->lock); |
| 539 | dev_set_drvdata(&pdev->dev, NULL); |
| 540 | |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | static const struct of_device_id vibrator_ldo_match_table[] = { |
| 545 | { .compatible = "qcom,qpnp-vibrator-ldo" }, |
| 546 | { /* sentinel */ }, |
| 547 | }; |
| 548 | MODULE_DEVICE_TABLE(of, vibrator_ldo_match_table); |
| 549 | |
| 550 | static struct platform_driver qpnp_vibrator_ldo_driver = { |
| 551 | .driver = { |
| 552 | .name = "qcom,qpnp-vibrator-ldo", |
| 553 | .of_match_table = vibrator_ldo_match_table, |
| 554 | .pm = &qpnp_vibrator_ldo_pm_ops, |
| 555 | }, |
| 556 | .probe = qpnp_vibrator_ldo_probe, |
| 557 | .remove = qpnp_vibrator_ldo_remove, |
| 558 | }; |
| 559 | module_platform_driver(qpnp_vibrator_ldo_driver); |
| 560 | |
| 561 | MODULE_DESCRIPTION("QCOM QPNP Vibrator-LDO driver"); |
| 562 | MODULE_LICENSE("GPL v2"); |