Shilpa Suresh | 68c62ad | 2020-03-20 17:39:55 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2013-2014, 2017, 2020, 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/clk.h> |
| 14 | #include <linux/clkdev.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/leds.h> |
| 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/of_gpio.h> |
| 21 | #include <linux/gpio.h> |
| 22 | #include <linux/of.h> |
| 23 | #include <linux/printk.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/clk/msm-clk.h> |
| 26 | #include <linux/clk/msm-clk-provider.h> |
| 27 | #include <linux/pinctrl/consumer.h> |
| 28 | |
| 29 | /* #define CONFIG_GPIO_FLASH_DEBUG */ |
| 30 | #undef CDBG |
| 31 | #ifdef CONFIG_GPIO_FLASH_DEBUG |
| 32 | #define CDBG(fmt, args...) pr_err(fmt, ##args) |
| 33 | #else |
| 34 | #define CDBG(fmt, args...) do { } while (0) |
| 35 | #endif |
| 36 | |
| 37 | #define LED_GPIO_FLASH_DRIVER_NAME "qcom,leds-gpio-flash" |
| 38 | #define LED_TRIGGER_DEFAULT "none" |
| 39 | |
| 40 | #define GPIO_OUT_LOW (0 << 1) |
| 41 | #define GPIO_OUT_HIGH (1 << 1) |
| 42 | |
| 43 | #define DUTY_CYCLE_BASE 100 |
| 44 | |
| 45 | enum msm_flash_seq_type_t { |
| 46 | FLASH_EN, |
| 47 | FLASH_NOW, |
| 48 | }; |
| 49 | |
| 50 | enum msm_flash_gpio_type_t { |
| 51 | NORMAL_GPIO, |
| 52 | CLK_GPIO, |
| 53 | }; |
| 54 | |
| 55 | struct msm_flash_ctrl_seq { |
| 56 | enum msm_flash_seq_type_t seq_type; |
| 57 | uint8_t flash_on_val; |
| 58 | uint8_t torch_on_val; |
| 59 | }; |
| 60 | |
| 61 | struct led_gpio_flash_data { |
| 62 | int flash_en; |
| 63 | int flash_now; |
| 64 | struct clk *flash_en_clk; |
| 65 | struct clk *flash_now_clk; |
| 66 | int brightness; |
| 67 | atomic_t clk_enabled[2]; |
| 68 | uint32_t clk_freq[2]; |
| 69 | uint32_t duty_cycle[2]; |
| 70 | enum msm_flash_gpio_type_t gpio_type[2]; |
| 71 | struct led_classdev cdev; |
| 72 | struct pinctrl *pinctrl; |
| 73 | struct pinctrl_state *gpio_state_default; |
| 74 | struct msm_flash_ctrl_seq ctrl_seq[2]; |
| 75 | }; |
| 76 | |
| 77 | static const struct of_device_id led_gpio_flash_of_match[] = { |
| 78 | {.compatible = LED_GPIO_FLASH_DRIVER_NAME,}, |
| 79 | {}, |
| 80 | }; |
| 81 | |
| 82 | static void led_gpio_brightness_set(struct led_classdev *led_cdev, |
| 83 | enum led_brightness value) |
| 84 | { |
| 85 | int rc = 0; |
| 86 | int brightness = value; |
| 87 | int flash_en = 0; |
| 88 | int flash_now = 0; |
| 89 | struct led_gpio_flash_data *flash_led = |
| 90 | container_of(led_cdev, struct led_gpio_flash_data, cdev); |
| 91 | |
| 92 | if (brightness > LED_HALF) { |
| 93 | flash_en = |
| 94 | flash_led->ctrl_seq[FLASH_EN].flash_on_val; |
| 95 | flash_now = |
| 96 | flash_led->ctrl_seq[FLASH_NOW].flash_on_val; |
| 97 | } else if (brightness > LED_OFF) { |
| 98 | flash_en = |
| 99 | flash_led->ctrl_seq[FLASH_EN].torch_on_val; |
| 100 | flash_now = |
| 101 | flash_led->ctrl_seq[FLASH_NOW].torch_on_val; |
| 102 | } else { |
| 103 | flash_en = 0; |
| 104 | flash_now = 0; |
| 105 | } |
| 106 | |
| 107 | CDBG("%s:flash_en=%d, flash_now=%d\n", __func__, flash_en, flash_now); |
| 108 | |
| 109 | if (flash_led->gpio_type[FLASH_EN] == NORMAL_GPIO) { |
| 110 | rc = gpio_direction_output(flash_led->flash_en, flash_en); |
| 111 | } else { |
| 112 | if (flash_en == GPIO_OUT_HIGH && |
| 113 | !atomic_read(&flash_led->clk_enabled[FLASH_EN])) { |
| 114 | rc = clk_prepare_enable(flash_led->flash_en_clk); |
| 115 | atomic_set(&flash_led->clk_enabled[FLASH_EN], 1); |
| 116 | } else if (flash_en == GPIO_OUT_LOW && |
| 117 | atomic_read(&flash_led->clk_enabled[FLASH_EN])) { |
| 118 | clk_disable_unprepare(flash_led->flash_en_clk); |
| 119 | atomic_set(&flash_led->clk_enabled[FLASH_EN], 0); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | if (rc) { |
| 124 | pr_err("%s: Failed to set flash en.\n", __func__); |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | if (flash_led->gpio_type[FLASH_NOW] == NORMAL_GPIO) { |
| 129 | rc = gpio_direction_output(flash_led->flash_now, flash_now); |
| 130 | } else { |
| 131 | if (flash_now == GPIO_OUT_HIGH && |
| 132 | !atomic_read(&flash_led->clk_enabled[FLASH_NOW])) { |
| 133 | rc = clk_prepare_enable(flash_led->flash_now_clk); |
| 134 | atomic_set(&flash_led->clk_enabled[FLASH_NOW], 1); |
| 135 | } else if (flash_now == GPIO_OUT_LOW && |
| 136 | atomic_read(&flash_led->clk_enabled[FLASH_NOW])) { |
| 137 | clk_disable_unprepare(flash_led->flash_now_clk); |
| 138 | atomic_set(&flash_led->clk_enabled[FLASH_NOW], 0); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | if (rc) { |
| 143 | pr_err("%s: Failed to set flash now.\n", __func__); |
| 144 | return; |
| 145 | } |
| 146 | |
| 147 | flash_led->brightness = brightness; |
| 148 | } |
| 149 | |
| 150 | static enum led_brightness led_gpio_brightness_get(struct led_classdev |
| 151 | *led_cdev) |
| 152 | { |
| 153 | struct led_gpio_flash_data *flash_led = |
| 154 | container_of(led_cdev, struct led_gpio_flash_data, cdev); |
| 155 | return flash_led->brightness; |
| 156 | } |
| 157 | |
| 158 | static int led_gpio_get_dt_data(struct device *dev, |
| 159 | struct led_gpio_flash_data *flash_led) |
| 160 | { |
| 161 | int rc = 0; |
| 162 | int i = 0; |
| 163 | const char *temp_str = NULL; |
| 164 | const char *seq_name = NULL; |
| 165 | uint32_t array_flash_seq[2]; |
| 166 | uint32_t array_torch_seq[2]; |
| 167 | struct device_node *node = dev->of_node; |
| 168 | |
| 169 | flash_led->cdev.default_trigger = LED_TRIGGER_DEFAULT; |
| 170 | rc = of_property_read_string(node, "linux,default-trigger", |
| 171 | &temp_str); |
| 172 | if (!rc) |
| 173 | flash_led->cdev.default_trigger = temp_str; |
| 174 | |
| 175 | rc = of_property_read_string(node, "linux,name", &flash_led->cdev.name); |
| 176 | if (rc) { |
| 177 | pr_err("Failed to read linux name. rc = %d\n", rc); |
| 178 | return rc; |
| 179 | } |
| 180 | |
| 181 | /* Configure the gpio type as NORMAL_GPIO by default, |
| 182 | * the gpio type should be CLK_GPIO if the frequency |
| 183 | * is not 0. |
| 184 | */ |
| 185 | flash_led->gpio_type[FLASH_EN] = NORMAL_GPIO; |
| 186 | flash_led->gpio_type[FLASH_NOW] = NORMAL_GPIO; |
| 187 | rc = of_property_read_u32_array(node, "qcom,clk-freq", |
| 188 | flash_led->clk_freq, 2); |
| 189 | if (!rc) { |
| 190 | if (flash_led->clk_freq[FLASH_EN]) |
| 191 | flash_led->gpio_type[FLASH_EN] = CLK_GPIO; |
| 192 | |
| 193 | if (flash_led->clk_freq[FLASH_NOW]) |
| 194 | flash_led->gpio_type[FLASH_NOW] = CLK_GPIO; |
| 195 | } |
| 196 | |
| 197 | if (flash_led->gpio_type[FLASH_EN] == NORMAL_GPIO) { |
| 198 | flash_led->flash_en = |
| 199 | of_get_named_gpio(node, "qcom,flash-en", 0); |
| 200 | if (flash_led->flash_en < 0) { |
| 201 | pr_err("Read flash-en property failed. rc = %d\n", |
| 202 | flash_led->flash_en); |
| 203 | return -EINVAL; |
| 204 | } |
| 205 | rc = gpio_request(flash_led->flash_en, "FLASH_EN"); |
| 206 | if (rc) { |
| 207 | pr_err("%s: Failed to request gpio %d,rc = %d\n", |
| 208 | __func__, flash_led->flash_en, rc); |
| 209 | return rc; |
| 210 | } |
| 211 | } else { |
| 212 | flash_led->flash_en_clk = |
| 213 | devm_clk_get(dev, "flash_en_clk"); |
| 214 | if (IS_ERR(flash_led->flash_en_clk)) { |
| 215 | pr_err("Failed to get flash-en clk.\n"); |
| 216 | return -EINVAL; |
| 217 | } |
| 218 | |
| 219 | flash_led->clk_freq[FLASH_EN] = |
| 220 | clk_round_rate(flash_led->flash_en_clk, |
| 221 | flash_led->clk_freq[FLASH_EN]); |
| 222 | rc = clk_set_rate(flash_led->flash_en_clk, |
| 223 | flash_led->clk_freq[FLASH_EN]); |
| 224 | if (rc) { |
| 225 | pr_err("%s: Failed to set rate for flash en.\n", |
| 226 | __func__); |
| 227 | return rc; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | if (flash_led->gpio_type[FLASH_NOW] == NORMAL_GPIO) { |
| 232 | flash_led->flash_now = |
| 233 | of_get_named_gpio(node, "qcom,flash-now", 0); |
| 234 | if (flash_led->flash_now < 0) { |
| 235 | pr_err("Read flash-now property failed. rc = %d\n", |
| 236 | flash_led->flash_now); |
| 237 | return -EINVAL; |
| 238 | } |
| 239 | rc = gpio_request(flash_led->flash_now, "FLASH_NOW"); |
| 240 | if (rc) { |
| 241 | pr_err("%s: Failed to request gpio %d,rc = %d\n", |
| 242 | __func__, flash_led->flash_now, rc); |
| 243 | return rc; |
| 244 | } |
| 245 | } else { |
| 246 | flash_led->flash_now_clk = |
| 247 | devm_clk_get(dev, "flash_now_clk"); |
| 248 | if (IS_ERR(flash_led->flash_now_clk)) { |
| 249 | pr_err("Failed to get flash-now clk.\n"); |
| 250 | return -EINVAL; |
| 251 | } |
| 252 | |
| 253 | flash_led->clk_freq[FLASH_NOW] = |
| 254 | clk_round_rate(flash_led->flash_now_clk, |
| 255 | flash_led->clk_freq[FLASH_NOW]); |
| 256 | rc = clk_set_rate(flash_led->flash_now_clk, |
| 257 | flash_led->clk_freq[FLASH_NOW]); |
| 258 | if (rc) { |
| 259 | pr_err("%s: Failed to set rate for flash now.\n", |
| 260 | __func__); |
| 261 | return rc; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /* Configure the duty cycle if need. */ |
| 266 | if (flash_led->gpio_type[FLASH_EN] == CLK_GPIO || |
| 267 | flash_led->gpio_type[FLASH_NOW] == CLK_GPIO) { |
| 268 | rc = of_property_read_u32_array(node, "qcom,duty-cycle", |
| 269 | flash_led->duty_cycle, 2); |
| 270 | if (!rc && |
| 271 | flash_led->duty_cycle[FLASH_EN] >= DUTY_CYCLE_BASE && |
| 272 | flash_led->duty_cycle[FLASH_NOW] >= DUTY_CYCLE_BASE) { |
| 273 | pr_err("%s: the duty cycle value is invalid.\n", |
| 274 | __func__); |
| 275 | return -EINVAL; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | /* Based on clk protocol, only RCG clks support duty cycle |
| 280 | * configuration, so if the used clk doesn't support set duty |
| 281 | * cycle, we use the clk's parent rcg clk to configure the |
| 282 | * duty cycle. |
| 283 | */ |
| 284 | if (flash_led->duty_cycle[FLASH_EN]) { |
| 285 | struct clk *flash_en_duty_cycle_clk = NULL; |
| 286 | |
| 287 | flash_en_duty_cycle_clk = devm_clk_get(dev, |
| 288 | "flash_en_duty_cycle_clk"); |
| 289 | if (!IS_ERR(flash_en_duty_cycle_clk)) { |
| 290 | rc = clk_set_duty_cycle(flash_en_duty_cycle_clk, |
| 291 | flash_led->duty_cycle[FLASH_EN], |
| 292 | DUTY_CYCLE_BASE); |
| 293 | clk_put(flash_en_duty_cycle_clk); |
| 294 | } else { |
| 295 | rc = clk_set_duty_cycle(flash_led->flash_en_clk, |
| 296 | flash_led->duty_cycle[FLASH_EN], |
| 297 | DUTY_CYCLE_BASE); |
| 298 | } |
| 299 | |
| 300 | if (rc) { |
| 301 | pr_err("Failed to set duty cycle for flash en.\n"); |
| 302 | return rc; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | if (flash_led->duty_cycle[FLASH_NOW]) { |
| 307 | struct clk *flash_now_duty_cycle_clk = NULL; |
| 308 | |
| 309 | flash_now_duty_cycle_clk = devm_clk_get(dev, |
| 310 | "flash_now_duty_cycle_clk"); |
| 311 | if (!IS_ERR(flash_now_duty_cycle_clk)) { |
| 312 | rc = clk_set_duty_cycle(flash_now_duty_cycle_clk, |
| 313 | flash_led->duty_cycle[FLASH_NOW], |
| 314 | DUTY_CYCLE_BASE); |
| 315 | clk_put(flash_now_duty_cycle_clk); |
| 316 | } else { |
| 317 | rc = clk_set_duty_cycle(flash_led->flash_now_clk, |
| 318 | flash_led->duty_cycle[FLASH_NOW], |
| 319 | DUTY_CYCLE_BASE); |
| 320 | } |
| 321 | |
| 322 | if (rc) { |
| 323 | pr_err("Failed to set duty cycle for flash now.\n"); |
| 324 | return rc; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | rc = of_property_read_u32_array(node, "qcom,flash-seq-val", |
| 329 | array_flash_seq, 2); |
| 330 | if (rc < 0) { |
| 331 | pr_err("Failed to get flash op seq, rc = %d\n", rc); |
| 332 | return rc; |
| 333 | } |
| 334 | |
| 335 | rc = of_property_read_u32_array(node, "qcom,torch-seq-val", |
| 336 | array_torch_seq, 2); |
| 337 | if (rc < 0) { |
| 338 | pr_err("Failed to get torch op seq, rc = %d\n", rc); |
| 339 | return rc; |
| 340 | } |
| 341 | |
| 342 | pr_debug("%s: seq: flash: %d, %d torch:%d, %d\n", __func__, |
| 343 | array_flash_seq[0], array_flash_seq[1], |
| 344 | array_torch_seq[0], array_torch_seq[1]); |
| 345 | |
| 346 | for (i = 0; i < 2; i++) { |
| 347 | rc = of_property_read_string_index(node, |
| 348 | "qcom,op-seq", i, |
| 349 | &seq_name); |
| 350 | CDBG("%s seq_name[%d] = %s\n", __func__, i, |
| 351 | seq_name); |
| 352 | if (rc < 0) { |
| 353 | pr_err("%s failed %d\n", __func__, __LINE__); |
| 354 | return rc; |
| 355 | } |
| 356 | |
| 357 | if (!strcmp(seq_name, "flash_en")) { |
| 358 | flash_led->ctrl_seq[FLASH_EN].seq_type = |
| 359 | FLASH_EN; |
| 360 | CDBG("%s:%d seq_type[%d] %d\n", __func__, __LINE__, |
| 361 | i, flash_led->ctrl_seq[FLASH_EN].seq_type); |
| 362 | if (array_flash_seq[i] == 0) |
| 363 | flash_led->ctrl_seq[FLASH_EN].flash_on_val = |
| 364 | GPIO_OUT_LOW; |
| 365 | else |
| 366 | flash_led->ctrl_seq[FLASH_EN].flash_on_val = |
| 367 | GPIO_OUT_HIGH; |
| 368 | |
| 369 | if (array_torch_seq[i] == 0) |
| 370 | flash_led->ctrl_seq[FLASH_EN].torch_on_val = |
| 371 | GPIO_OUT_LOW; |
| 372 | else |
| 373 | flash_led->ctrl_seq[FLASH_EN].torch_on_val = |
| 374 | GPIO_OUT_HIGH; |
| 375 | } else if (!strcmp(seq_name, "flash_now")) { |
| 376 | flash_led->ctrl_seq[FLASH_NOW].seq_type = |
| 377 | FLASH_NOW; |
| 378 | CDBG("%s:%d seq_type[%d] %d\n", __func__, __LINE__, |
| 379 | i, flash_led->ctrl_seq[FLASH_NOW].seq_type); |
| 380 | if (array_flash_seq[i] == 0) |
| 381 | flash_led->ctrl_seq[FLASH_NOW].flash_on_val = |
| 382 | GPIO_OUT_LOW; |
| 383 | else |
| 384 | flash_led->ctrl_seq[FLASH_NOW].flash_on_val = |
| 385 | GPIO_OUT_HIGH; |
| 386 | |
| 387 | if (array_torch_seq[i] == 0) |
| 388 | flash_led->ctrl_seq[FLASH_NOW].torch_on_val = |
| 389 | GPIO_OUT_LOW; |
| 390 | else |
| 391 | flash_led->ctrl_seq[FLASH_NOW].torch_on_val = |
| 392 | GPIO_OUT_HIGH; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | return rc; |
| 397 | } |
| 398 | |
| 399 | static int led_gpio_flash_probe(struct platform_device *pdev) |
| 400 | { |
| 401 | int rc = 0; |
| 402 | struct led_gpio_flash_data *flash_led = NULL; |
| 403 | |
| 404 | flash_led = devm_kzalloc(&pdev->dev, sizeof(struct led_gpio_flash_data), |
| 405 | GFP_KERNEL); |
| 406 | if (flash_led == NULL) |
| 407 | return -ENOMEM; |
| 408 | |
| 409 | flash_led->pinctrl = devm_pinctrl_get(&pdev->dev); |
| 410 | if (IS_ERR(flash_led->pinctrl)) { |
| 411 | pr_err("%s:failed to get pinctrl\n", __func__); |
| 412 | rc = PTR_ERR(flash_led->pinctrl); |
| 413 | goto error; |
| 414 | } |
| 415 | |
| 416 | flash_led->gpio_state_default = pinctrl_lookup_state(flash_led->pinctrl, |
| 417 | "flash_default"); |
| 418 | if (IS_ERR(flash_led->gpio_state_default)) { |
| 419 | pr_err("%s:can not get active pinstate\n", __func__); |
| 420 | rc = -EINVAL; |
| 421 | goto error; |
| 422 | } |
| 423 | |
| 424 | rc = pinctrl_select_state(flash_led->pinctrl, |
| 425 | flash_led->gpio_state_default); |
| 426 | if (rc) { |
| 427 | pr_err("%s:set state failed!\n", __func__); |
| 428 | goto error; |
| 429 | } |
| 430 | |
| 431 | rc = led_gpio_get_dt_data(&pdev->dev, flash_led); |
| 432 | if (rc) { |
| 433 | pr_err("%s: get device tree data failed.\n", |
| 434 | __func__); |
| 435 | goto error; |
| 436 | } |
| 437 | |
| 438 | /* Add these atomic variables to make sure clk is disabled |
| 439 | * just after the clk has been enabled. |
| 440 | */ |
| 441 | atomic_set(&flash_led->clk_enabled[FLASH_EN], 0); |
| 442 | atomic_set(&flash_led->clk_enabled[FLASH_NOW], 0); |
| 443 | |
| 444 | platform_set_drvdata(pdev, flash_led); |
| 445 | flash_led->cdev.max_brightness = LED_FULL; |
| 446 | flash_led->cdev.brightness_set = led_gpio_brightness_set; |
| 447 | flash_led->cdev.brightness_get = led_gpio_brightness_get; |
| 448 | |
| 449 | rc = led_classdev_register(&pdev->dev, &flash_led->cdev); |
| 450 | if (rc) { |
| 451 | pr_err("%s: Failed to register led dev. rc = %d\n", |
| 452 | __func__, rc); |
| 453 | goto error; |
| 454 | } |
| 455 | pr_err("%s:probe successfully!\n", __func__); |
| 456 | return 0; |
| 457 | |
| 458 | error: |
| 459 | if (flash_led->gpio_type[FLASH_EN] == CLK_GPIO && |
| 460 | IS_ERR(flash_led->flash_en_clk)) |
| 461 | devm_clk_put(&pdev->dev, flash_led->flash_en_clk); |
| 462 | else if (flash_led->gpio_type[FLASH_EN] == NORMAL_GPIO && |
| 463 | flash_led->flash_en) |
| 464 | gpio_free(flash_led->flash_en); |
| 465 | |
| 466 | if (flash_led->gpio_type[FLASH_NOW] == CLK_GPIO && |
| 467 | IS_ERR(flash_led->flash_now_clk)) |
| 468 | devm_clk_put(&pdev->dev, flash_led->flash_now_clk); |
| 469 | else if (flash_led->gpio_type[FLASH_NOW] == NORMAL_GPIO && |
| 470 | flash_led->flash_now) |
| 471 | gpio_free(flash_led->flash_now); |
| 472 | |
| 473 | if (IS_ERR(flash_led->pinctrl)) |
| 474 | devm_pinctrl_put(flash_led->pinctrl); |
| 475 | |
| 476 | devm_kfree(&pdev->dev, flash_led); |
| 477 | return rc; |
| 478 | } |
| 479 | |
| 480 | static int led_gpio_flash_remove(struct platform_device *pdev) |
| 481 | { |
| 482 | struct led_gpio_flash_data *flash_led = |
| 483 | (struct led_gpio_flash_data *)platform_get_drvdata(pdev); |
| 484 | if (IS_ERR(flash_led->pinctrl)) |
| 485 | devm_pinctrl_put(flash_led->pinctrl); |
| 486 | led_classdev_unregister(&flash_led->cdev); |
| 487 | devm_kfree(&pdev->dev, flash_led); |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static struct platform_driver led_gpio_flash_driver = { |
| 492 | .probe = led_gpio_flash_probe, |
| 493 | .remove = led_gpio_flash_remove, |
| 494 | .driver = { |
| 495 | .name = LED_GPIO_FLASH_DRIVER_NAME, |
| 496 | .owner = THIS_MODULE, |
| 497 | .of_match_table = led_gpio_flash_of_match, |
| 498 | } |
| 499 | }; |
| 500 | |
| 501 | static int __init led_gpio_flash_init(void) |
| 502 | { |
| 503 | return platform_driver_register(&led_gpio_flash_driver); |
| 504 | } |
| 505 | |
| 506 | static void __exit led_gpio_flash_exit(void) |
| 507 | { |
| 508 | return platform_driver_unregister(&led_gpio_flash_driver); |
| 509 | } |
| 510 | |
| 511 | late_initcall(led_gpio_flash_init); |
| 512 | module_exit(led_gpio_flash_exit); |
| 513 | |
| 514 | MODULE_DESCRIPTION("QTI GPIO LEDs driver"); |
| 515 | MODULE_LICENSE("GPL v2"); |
| 516 | MODULE_ALIAS("leds:leds-msm-gpio-flash"); |