Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 1 | /* Copyright (c) 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 | #include <linux/bitops.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/leds.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/mutex.h> |
| 21 | #include <linux/of.h> |
| 22 | #include <linux/of_address.h> |
| 23 | #include <linux/platform_device.h> |
| 24 | #include <linux/pwm.h> |
| 25 | #include <linux/regmap.h> |
| 26 | #include <linux/types.h> |
| 27 | |
| 28 | #define TRILED_REG_TYPE 0x04 |
| 29 | #define TRILED_REG_SUBTYPE 0x05 |
| 30 | #define TRILED_REG_EN_CTL 0x46 |
| 31 | |
| 32 | /* TRILED_REG_EN_CTL */ |
| 33 | #define TRILED_EN_CTL_MASK GENMASK(7, 5) |
| 34 | #define TRILED_EN_CTL_MAX_BIT 7 |
| 35 | |
| 36 | #define TRILED_TYPE 0x19 |
| 37 | #define TRILED_SUBTYPE_LED3H0L12 0x02 |
| 38 | #define TRILED_SUBTYPE_LED2H0L12 0x03 |
| 39 | #define TRILED_SUBTYPE_LED1H2L12 0x04 |
| 40 | |
| 41 | #define TRILED_NUM_MAX 3 |
| 42 | |
| 43 | #define PWM_PERIOD_DEFAULT_NS 1000000 |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 44 | |
| 45 | struct pwm_setting { |
Fenglin Wu | 5898366 | 2018-09-10 10:36:57 +0800 | [diff] [blame] | 46 | u64 pre_period_ns; |
| 47 | u64 period_ns; |
| 48 | u64 duty_ns; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 49 | }; |
| 50 | |
| 51 | struct led_setting { |
Fenglin Wu | 5898366 | 2018-09-10 10:36:57 +0800 | [diff] [blame] | 52 | u64 on_ms; |
| 53 | u64 off_ms; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 54 | enum led_brightness brightness; |
| 55 | bool blink; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 56 | bool breath; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | struct qpnp_led_dev { |
| 60 | struct led_classdev cdev; |
| 61 | struct pwm_device *pwm_dev; |
| 62 | struct pwm_setting pwm_setting; |
| 63 | struct led_setting led_setting; |
| 64 | struct qpnp_tri_led_chip *chip; |
| 65 | struct mutex lock; |
| 66 | const char *label; |
| 67 | const char *default_trigger; |
| 68 | u8 id; |
| 69 | bool blinking; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 70 | bool breathing; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 71 | }; |
| 72 | |
| 73 | struct qpnp_tri_led_chip { |
| 74 | struct device *dev; |
| 75 | struct regmap *regmap; |
| 76 | struct qpnp_led_dev *leds; |
| 77 | struct mutex bus_lock; |
| 78 | int num_leds; |
| 79 | u16 reg_base; |
| 80 | u8 subtype; |
| 81 | }; |
| 82 | |
| 83 | static int qpnp_tri_led_read(struct qpnp_tri_led_chip *chip, u16 addr, u8 *val) |
| 84 | { |
| 85 | int rc; |
| 86 | unsigned int tmp; |
| 87 | |
| 88 | mutex_lock(&chip->bus_lock); |
| 89 | rc = regmap_read(chip->regmap, chip->reg_base + addr, &tmp); |
| 90 | if (rc < 0) |
| 91 | dev_err(chip->dev, "Read addr 0x%x failed, rc=%d\n", addr, rc); |
| 92 | else |
| 93 | *val = (u8)tmp; |
| 94 | mutex_unlock(&chip->bus_lock); |
| 95 | |
| 96 | return rc; |
| 97 | } |
| 98 | |
| 99 | static int qpnp_tri_led_masked_write(struct qpnp_tri_led_chip *chip, |
| 100 | u16 addr, u8 mask, u8 val) |
| 101 | { |
| 102 | int rc; |
| 103 | |
| 104 | mutex_lock(&chip->bus_lock); |
| 105 | rc = regmap_update_bits(chip->regmap, chip->reg_base + addr, mask, val); |
| 106 | if (rc < 0) |
| 107 | dev_err(chip->dev, "Update addr 0x%x to val 0x%x with mask 0x%x failed, rc=%d\n", |
| 108 | addr, val, mask, rc); |
| 109 | mutex_unlock(&chip->bus_lock); |
| 110 | |
| 111 | return rc; |
| 112 | } |
| 113 | |
| 114 | static int __tri_led_config_pwm(struct qpnp_led_dev *led, |
| 115 | struct pwm_setting *pwm) |
| 116 | { |
| 117 | struct pwm_state pstate; |
| 118 | int rc; |
| 119 | |
| 120 | pwm_get_state(led->pwm_dev, &pstate); |
| 121 | pstate.enabled = !!(pwm->duty_ns != 0); |
| 122 | pstate.period = pwm->period_ns; |
| 123 | pstate.duty_cycle = pwm->duty_ns; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 124 | pstate.output_type = led->led_setting.breath ? |
| 125 | PWM_OUTPUT_MODULATED : PWM_OUTPUT_FIXED; |
| 126 | /* Use default pattern in PWM device */ |
| 127 | pstate.output_pattern = NULL; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 128 | rc = pwm_apply_state(led->pwm_dev, &pstate); |
| 129 | |
| 130 | if (rc < 0) |
| 131 | dev_err(led->chip->dev, "Apply PWM state for %s led failed, rc=%d\n", |
| 132 | led->cdev.name, rc); |
| 133 | |
| 134 | return rc; |
| 135 | } |
| 136 | |
| 137 | static int __tri_led_set(struct qpnp_led_dev *led) |
| 138 | { |
| 139 | int rc = 0; |
| 140 | u8 val = 0, mask = 0; |
| 141 | |
| 142 | rc = __tri_led_config_pwm(led, &led->pwm_setting); |
| 143 | if (rc < 0) { |
| 144 | dev_err(led->chip->dev, "Configure PWM for %s led failed, rc=%d\n", |
| 145 | led->cdev.name, rc); |
| 146 | return rc; |
| 147 | } |
| 148 | |
| 149 | mask |= 1 << (TRILED_EN_CTL_MAX_BIT - led->id); |
| 150 | |
| 151 | if (led->pwm_setting.duty_ns == 0) |
| 152 | val = 0; |
| 153 | else |
| 154 | val = mask; |
| 155 | |
| 156 | rc = qpnp_tri_led_masked_write(led->chip, TRILED_REG_EN_CTL, |
| 157 | mask, val); |
| 158 | if (rc < 0) |
| 159 | dev_err(led->chip->dev, "Update addr 0x%x failed, rc=%d\n", |
| 160 | TRILED_REG_EN_CTL, rc); |
| 161 | |
| 162 | return rc; |
| 163 | } |
| 164 | |
| 165 | static int qpnp_tri_led_set(struct qpnp_led_dev *led) |
| 166 | { |
Fenglin Wu | 5898366 | 2018-09-10 10:36:57 +0800 | [diff] [blame] | 167 | u64 on_ms, off_ms, period_ns, duty_ns; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 168 | enum led_brightness brightness = led->led_setting.brightness; |
| 169 | int rc = 0; |
| 170 | |
| 171 | if (led->led_setting.blink) { |
| 172 | on_ms = led->led_setting.on_ms; |
| 173 | off_ms = led->led_setting.off_ms; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 174 | |
Fenglin Wu | 5898366 | 2018-09-10 10:36:57 +0800 | [diff] [blame] | 175 | duty_ns = on_ms * NSEC_PER_MSEC; |
| 176 | period_ns = (on_ms + off_ms) * NSEC_PER_MSEC; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 177 | |
| 178 | if (period_ns < duty_ns && duty_ns != 0) |
| 179 | period_ns = duty_ns + 1; |
| 180 | } else { |
| 181 | /* Use initial period if no blinking is required */ |
| 182 | period_ns = led->pwm_setting.pre_period_ns; |
| 183 | |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 184 | if (brightness == LED_OFF) |
| 185 | duty_ns = 0; |
Fenglin Wu | 5898366 | 2018-09-10 10:36:57 +0800 | [diff] [blame] | 186 | |
| 187 | duty_ns = period_ns * brightness; |
| 188 | do_div(duty_ns, LED_FULL); |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 189 | |
| 190 | if (period_ns < duty_ns && duty_ns != 0) |
| 191 | period_ns = duty_ns + 1; |
| 192 | } |
Fenglin Wu | 5898366 | 2018-09-10 10:36:57 +0800 | [diff] [blame] | 193 | dev_dbg(led->chip->dev, "PWM settings for %s led: period = %lluns, duty = %lluns\n", |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 194 | led->cdev.name, period_ns, duty_ns); |
| 195 | |
| 196 | led->pwm_setting.duty_ns = duty_ns; |
| 197 | led->pwm_setting.period_ns = period_ns; |
| 198 | |
| 199 | rc = __tri_led_set(led); |
| 200 | if (rc < 0) { |
| 201 | dev_err(led->chip->dev, "__tri_led_set %s failed, rc=%d\n", |
| 202 | led->cdev.name, rc); |
| 203 | return rc; |
| 204 | } |
| 205 | |
| 206 | if (led->led_setting.blink) { |
| 207 | led->cdev.brightness = LED_FULL; |
| 208 | led->blinking = true; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 209 | led->breathing = false; |
| 210 | } else if (led->led_setting.breath) { |
| 211 | led->cdev.brightness = LED_FULL; |
| 212 | led->blinking = false; |
| 213 | led->breathing = true; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 214 | } else { |
| 215 | led->cdev.brightness = led->led_setting.brightness; |
| 216 | led->blinking = false; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 217 | led->breathing = false; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | return rc; |
| 221 | } |
| 222 | |
| 223 | static int qpnp_tri_led_set_brightness(struct led_classdev *led_cdev, |
| 224 | enum led_brightness brightness) |
| 225 | { |
| 226 | struct qpnp_led_dev *led = |
| 227 | container_of(led_cdev, struct qpnp_led_dev, cdev); |
| 228 | int rc = 0; |
| 229 | |
| 230 | mutex_lock(&led->lock); |
| 231 | if (brightness > LED_FULL) |
| 232 | brightness = LED_FULL; |
| 233 | |
| 234 | if (brightness == led->led_setting.brightness && |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 235 | !led->blinking && !led->breathing) { |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 236 | mutex_unlock(&led->lock); |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | led->led_setting.brightness = brightness; |
| 241 | if (!!brightness) |
| 242 | led->led_setting.off_ms = 0; |
| 243 | else |
| 244 | led->led_setting.on_ms = 0; |
| 245 | led->led_setting.blink = false; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 246 | led->led_setting.breath = false; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 247 | |
| 248 | rc = qpnp_tri_led_set(led); |
| 249 | if (rc) |
| 250 | dev_err(led->chip->dev, "Set led failed for %s, rc=%d\n", |
| 251 | led->label, rc); |
| 252 | |
| 253 | mutex_unlock(&led->lock); |
| 254 | |
| 255 | return rc; |
| 256 | } |
| 257 | |
| 258 | static enum led_brightness qpnp_tri_led_get_brightness( |
| 259 | struct led_classdev *led_cdev) |
| 260 | { |
| 261 | return led_cdev->brightness; |
| 262 | } |
| 263 | |
| 264 | static int qpnp_tri_led_set_blink(struct led_classdev *led_cdev, |
| 265 | unsigned long *on_ms, unsigned long *off_ms) |
| 266 | { |
| 267 | struct qpnp_led_dev *led = |
| 268 | container_of(led_cdev, struct qpnp_led_dev, cdev); |
| 269 | int rc = 0; |
| 270 | |
| 271 | mutex_lock(&led->lock); |
| 272 | if (led->blinking && *on_ms == led->led_setting.on_ms && |
| 273 | *off_ms == led->led_setting.off_ms) { |
| 274 | dev_dbg(led_cdev->dev, "Ignore, on/off setting is not changed: on %lums, off %lums\n", |
| 275 | *on_ms, *off_ms); |
| 276 | mutex_unlock(&led->lock); |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | if (*on_ms == 0) { |
| 281 | led->led_setting.blink = false; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 282 | led->led_setting.breath = false; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 283 | led->led_setting.brightness = LED_OFF; |
| 284 | } else if (*off_ms == 0) { |
| 285 | led->led_setting.blink = false; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 286 | led->led_setting.breath = false; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 287 | led->led_setting.brightness = led->cdev.brightness; |
| 288 | } else { |
| 289 | led->led_setting.on_ms = *on_ms; |
| 290 | led->led_setting.off_ms = *off_ms; |
| 291 | led->led_setting.blink = true; |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 292 | led->led_setting.breath = false; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | rc = qpnp_tri_led_set(led); |
| 296 | if (rc) |
| 297 | dev_err(led->chip->dev, "Set led failed for %s, rc=%d\n", |
| 298 | led->label, rc); |
| 299 | |
| 300 | mutex_unlock(&led->lock); |
| 301 | return rc; |
| 302 | } |
| 303 | |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 304 | static ssize_t breath_show(struct device *dev, struct device_attribute *attr, |
| 305 | char *buf) |
| 306 | { |
| 307 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
| 308 | struct qpnp_led_dev *led = |
| 309 | container_of(led_cdev, struct qpnp_led_dev, cdev); |
| 310 | |
| 311 | return snprintf(buf, PAGE_SIZE, "%d\n", led->led_setting.breath); |
| 312 | } |
| 313 | |
| 314 | static ssize_t breath_store(struct device *dev, struct device_attribute *attr, |
| 315 | const char *buf, size_t count) |
| 316 | { |
| 317 | int rc; |
| 318 | bool breath; |
| 319 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
| 320 | struct qpnp_led_dev *led = |
| 321 | container_of(led_cdev, struct qpnp_led_dev, cdev); |
| 322 | |
| 323 | rc = kstrtobool(buf, &breath); |
| 324 | if (rc < 0) |
| 325 | return rc; |
| 326 | |
| 327 | mutex_lock(&led->lock); |
| 328 | if (led->breathing == breath) |
| 329 | goto unlock; |
| 330 | |
| 331 | led->led_setting.blink = false; |
| 332 | led->led_setting.breath = breath; |
| 333 | led->led_setting.brightness = breath ? LED_FULL : LED_OFF; |
| 334 | rc = qpnp_tri_led_set(led); |
| 335 | if (rc < 0) |
| 336 | dev_err(led->chip->dev, "Set led failed for %s, rc=%d\n", |
| 337 | led->label, rc); |
| 338 | |
| 339 | unlock: |
| 340 | mutex_unlock(&led->lock); |
| 341 | return (rc < 0) ? rc : count; |
| 342 | } |
| 343 | |
| 344 | static DEVICE_ATTR(breath, 0644, breath_show, breath_store); |
| 345 | static const struct attribute *breath_attrs[] = { |
| 346 | &dev_attr_breath.attr, |
| 347 | NULL |
| 348 | }; |
| 349 | |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 350 | static int qpnp_tri_led_register(struct qpnp_tri_led_chip *chip) |
| 351 | { |
| 352 | struct qpnp_led_dev *led; |
| 353 | int rc, i, j; |
| 354 | |
| 355 | for (i = 0; i < chip->num_leds; i++) { |
| 356 | led = &chip->leds[i]; |
| 357 | mutex_init(&led->lock); |
| 358 | led->cdev.name = led->label; |
| 359 | led->cdev.max_brightness = LED_FULL; |
| 360 | led->cdev.brightness_set_blocking = qpnp_tri_led_set_brightness; |
| 361 | led->cdev.brightness_get = qpnp_tri_led_get_brightness; |
| 362 | led->cdev.blink_set = qpnp_tri_led_set_blink; |
| 363 | led->cdev.default_trigger = led->default_trigger; |
| 364 | led->cdev.brightness = LED_OFF; |
Fenglin Wu | 0069945 | 2018-02-28 09:21:38 +0800 | [diff] [blame] | 365 | led->cdev.flags |= LED_KEEP_TRIGGER; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 366 | |
| 367 | rc = devm_led_classdev_register(chip->dev, &led->cdev); |
| 368 | if (rc < 0) { |
| 369 | dev_err(chip->dev, "%s led class device registering failed, rc=%d\n", |
| 370 | led->label, rc); |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 371 | goto err_out; |
| 372 | } |
| 373 | |
| 374 | if (pwm_get_output_type_supported(led->pwm_dev) |
| 375 | & PWM_OUTPUT_MODULATED) { |
| 376 | rc = sysfs_create_files(&led->cdev.dev->kobj, |
| 377 | breath_attrs); |
| 378 | if (rc < 0) { |
| 379 | dev_err(chip->dev, "Create breath file for %s led failed, rc=%d\n", |
| 380 | led->label, rc); |
| 381 | goto err_out; |
| 382 | } |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 383 | } |
| 384 | } |
| 385 | |
| 386 | return 0; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 387 | |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 388 | err_out: |
| 389 | for (j = 0; j <= i; j++) { |
| 390 | if (j < i) |
| 391 | sysfs_remove_files(&chip->leds[j].cdev.dev->kobj, |
| 392 | breath_attrs); |
| 393 | mutex_destroy(&chip->leds[j].lock); |
| 394 | } |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 395 | return rc; |
| 396 | } |
| 397 | |
| 398 | static int qpnp_tri_led_hw_init(struct qpnp_tri_led_chip *chip) |
| 399 | { |
| 400 | int rc = 0; |
| 401 | u8 val; |
| 402 | |
| 403 | rc = qpnp_tri_led_read(chip, TRILED_REG_TYPE, &val); |
| 404 | if (rc < 0) { |
| 405 | dev_err(chip->dev, "Read REG_TYPE failed, rc=%d\n", rc); |
| 406 | return rc; |
| 407 | } |
| 408 | |
| 409 | if (val != TRILED_TYPE) { |
| 410 | dev_err(chip->dev, "invalid subtype(%d)\n", val); |
| 411 | return -ENODEV; |
| 412 | } |
| 413 | |
| 414 | rc = qpnp_tri_led_read(chip, TRILED_REG_SUBTYPE, &val); |
| 415 | if (rc < 0) { |
| 416 | dev_err(chip->dev, "Read REG_SUBTYPE failed, rc=%d\n", rc); |
| 417 | return rc; |
| 418 | } |
| 419 | |
| 420 | chip->subtype = val; |
| 421 | |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | static int qpnp_tri_led_parse_dt(struct qpnp_tri_led_chip *chip) |
| 426 | { |
| 427 | struct device_node *node = chip->dev->of_node, *child_node; |
| 428 | struct qpnp_led_dev *led; |
| 429 | struct pwm_args pargs; |
| 430 | const __be32 *addr; |
Kiran Gunda | 84d7c9e | 2018-03-15 18:03:06 +0530 | [diff] [blame] | 431 | int rc = 0, id, i = 0; |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 432 | |
| 433 | addr = of_get_address(chip->dev->of_node, 0, NULL, NULL); |
| 434 | if (!addr) { |
| 435 | dev_err(chip->dev, "Getting address failed\n"); |
| 436 | return -EINVAL; |
| 437 | } |
| 438 | chip->reg_base = be32_to_cpu(addr[0]); |
| 439 | |
| 440 | chip->num_leds = of_get_available_child_count(node); |
| 441 | if (chip->num_leds == 0) { |
| 442 | dev_err(chip->dev, "No led child node defined\n"); |
| 443 | return -ENODEV; |
| 444 | } |
| 445 | |
| 446 | if (chip->num_leds > TRILED_NUM_MAX) { |
| 447 | dev_err(chip->dev, "can't support %d leds(max %d)\n", |
| 448 | chip->num_leds, TRILED_NUM_MAX); |
| 449 | return -EINVAL; |
| 450 | } |
| 451 | |
| 452 | chip->leds = devm_kcalloc(chip->dev, chip->num_leds, |
| 453 | sizeof(struct qpnp_led_dev), GFP_KERNEL); |
| 454 | if (!chip->leds) |
| 455 | return -ENOMEM; |
| 456 | |
| 457 | for_each_available_child_of_node(node, child_node) { |
| 458 | rc = of_property_read_u32(child_node, "led-sources", &id); |
| 459 | if (rc) { |
| 460 | dev_err(chip->dev, "Get led-sources failed, rc=%d\n", |
| 461 | rc); |
| 462 | return rc; |
| 463 | } |
| 464 | |
| 465 | if (id >= TRILED_NUM_MAX) { |
| 466 | dev_err(chip->dev, "only support 0~%d current source\n", |
| 467 | TRILED_NUM_MAX - 1); |
| 468 | return -EINVAL; |
| 469 | } |
| 470 | |
| 471 | led = &chip->leds[i++]; |
| 472 | led->chip = chip; |
| 473 | led->id = id; |
| 474 | led->label = |
| 475 | of_get_property(child_node, "label", NULL) ? : |
| 476 | child_node->name; |
| 477 | |
yutingshih | 81a7351 | 2020-04-21 16:03:55 +0800 | [diff] [blame^] | 478 | //<2020/04/21-Yuting Shih.[FAIRPHONE-Q][MISC][COMMON][LED][][]Add for flag initial. |
| 479 | led->pwm_setting.pre_period_ns = 0; |
| 480 | led->pwm_setting.period_ns = 0; |
| 481 | led->pwm_setting.duty_ns = 0; |
| 482 | |
| 483 | led->led_setting.on_ms = 0; |
| 484 | led->led_setting.off_ms = 0; |
| 485 | led->led_setting.brightness = LED_OFF; |
| 486 | led->led_setting.blink = false; |
| 487 | led->led_setting.breath = false; |
| 488 | |
| 489 | led->blinking = false; |
| 490 | led->breathing = false; |
| 491 | //>2020/04/21-Yuting Shih.[FAIRPHONE-Q][MISC][COMMON][LED][][]. |
| 492 | |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 493 | led->pwm_dev = |
| 494 | devm_of_pwm_get(chip->dev, child_node, NULL); |
| 495 | if (IS_ERR(led->pwm_dev)) { |
| 496 | rc = PTR_ERR(led->pwm_dev); |
| 497 | if (rc != -EPROBE_DEFER) |
| 498 | dev_err(chip->dev, "Get pwm device for %s led failed, rc=%d\n", |
| 499 | led->label, rc); |
| 500 | return rc; |
| 501 | } |
| 502 | |
| 503 | pwm_get_args(led->pwm_dev, &pargs); |
| 504 | if (pargs.period == 0) |
| 505 | led->pwm_setting.pre_period_ns = PWM_PERIOD_DEFAULT_NS; |
| 506 | else |
| 507 | led->pwm_setting.pre_period_ns = pargs.period; |
| 508 | |
| 509 | led->default_trigger = of_get_property(child_node, |
| 510 | "linux,default-trigger", NULL); |
| 511 | } |
| 512 | |
| 513 | return rc; |
| 514 | } |
| 515 | |
| 516 | static int qpnp_tri_led_probe(struct platform_device *pdev) |
| 517 | { |
| 518 | struct qpnp_tri_led_chip *chip; |
| 519 | int rc = 0; |
| 520 | |
| 521 | chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); |
| 522 | if (!chip) |
| 523 | return -ENOMEM; |
| 524 | |
| 525 | chip->dev = &pdev->dev; |
| 526 | chip->regmap = dev_get_regmap(chip->dev->parent, NULL); |
| 527 | if (!chip->regmap) { |
| 528 | dev_err(chip->dev, "Getting regmap failed\n"); |
| 529 | return -EINVAL; |
| 530 | } |
| 531 | |
| 532 | rc = qpnp_tri_led_parse_dt(chip); |
| 533 | if (rc < 0) { |
| 534 | dev_err(chip->dev, "Devicetree properties parsing failed, rc=%d\n", |
| 535 | rc); |
| 536 | return rc; |
| 537 | } |
| 538 | |
| 539 | mutex_init(&chip->bus_lock); |
| 540 | |
| 541 | rc = qpnp_tri_led_hw_init(chip); |
| 542 | if (rc) { |
| 543 | dev_err(chip->dev, "HW initialization failed, rc=%d\n", rc); |
| 544 | goto destroy; |
| 545 | } |
| 546 | |
| 547 | dev_set_drvdata(chip->dev, chip); |
| 548 | rc = qpnp_tri_led_register(chip); |
| 549 | if (rc < 0) { |
| 550 | dev_err(chip->dev, "Registering LED class devices failed, rc=%d\n", |
| 551 | rc); |
| 552 | goto destroy; |
| 553 | } |
| 554 | |
| 555 | dev_dbg(chip->dev, "Tri-led module with subtype 0x%x is detected\n", |
| 556 | chip->subtype); |
| 557 | return 0; |
| 558 | destroy: |
| 559 | mutex_destroy(&chip->bus_lock); |
| 560 | dev_set_drvdata(chip->dev, NULL); |
| 561 | |
| 562 | return rc; |
| 563 | } |
| 564 | |
| 565 | static int qpnp_tri_led_remove(struct platform_device *pdev) |
| 566 | { |
| 567 | int i; |
| 568 | struct qpnp_tri_led_chip *chip = dev_get_drvdata(&pdev->dev); |
| 569 | |
| 570 | mutex_destroy(&chip->bus_lock); |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 571 | for (i = 0; i < chip->num_leds; i++) { |
| 572 | sysfs_remove_files(&chip->leds[i].cdev.dev->kobj, breath_attrs); |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 573 | mutex_destroy(&chip->leds[i].lock); |
Fenglin Wu | c9c06e0 | 2018-01-28 13:57:43 +0800 | [diff] [blame] | 574 | } |
Fenglin Wu | 3b507ad | 2017-11-13 10:46:02 +0800 | [diff] [blame] | 575 | dev_set_drvdata(chip->dev, NULL); |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static const struct of_device_id qpnp_tri_led_of_match[] = { |
| 580 | { .compatible = "qcom,tri-led",}, |
| 581 | { }, |
| 582 | }; |
| 583 | |
| 584 | static struct platform_driver qpnp_tri_led_driver = { |
| 585 | .driver = { |
| 586 | .name = "qcom,tri-led", |
| 587 | .of_match_table = qpnp_tri_led_of_match, |
| 588 | }, |
| 589 | .probe = qpnp_tri_led_probe, |
| 590 | .remove = qpnp_tri_led_remove, |
| 591 | }; |
| 592 | module_platform_driver(qpnp_tri_led_driver); |
| 593 | |
| 594 | MODULE_DESCRIPTION("QTI TRI_LED driver"); |
| 595 | MODULE_LICENSE("GPL v2"); |
| 596 | MODULE_ALIAS("leds:qpnp-tri-led"); |