Amy Maloche | f3d5a06 | 2012-08-16 19:14:11 -0700 | [diff] [blame^] | 1 | |
| 2 | /* Copyright (c) 2012, Code Aurora Forum. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/leds.h> |
| 19 | #include <linux/err.h> |
| 20 | #include <linux/of_platform.h> |
| 21 | #include <linux/of_device.h> |
| 22 | #include <linux/spmi.h> |
| 23 | |
| 24 | #define WLED_MOD_EN_REG(base, n) (base + 0x60 + n*0x10) |
| 25 | #define WLED_IDAC_DLY_REG(base, n) (WLED_MOD_EN_REG(base, n) + 0x01) |
| 26 | #define WLED_FULL_SCALE_REG(base, n) (WLED_IDAC_DLY_REG(base, n) + 0x01) |
| 27 | |
| 28 | /* wled control registers */ |
| 29 | #define WLED_BRIGHTNESS_CNTL_LSB(base, n) (base + 0x40 + 2*n) |
| 30 | #define WLED_BRIGHTNESS_CNTL_MSB(base, n) (base + 0x41 + 2*n) |
| 31 | #define WLED_MOD_CTRL_REG(base) (base + 0x46) |
| 32 | #define WLED_SYNC_REG(base) (base + 0x47) |
| 33 | #define WLED_FDBCK_CTRL_REG(base) (base + 0x48) |
| 34 | #define WLED_SWITCHING_FREQ_REG(base) (base + 0x4C) |
| 35 | #define WLED_OVP_CFG_REG(base) (base + 0x4D) |
| 36 | #define WLED_BOOST_LIMIT_REG(base) (base + 0x4E) |
| 37 | #define WLED_CURR_SINK_REG(base) (base + 0x4F) |
| 38 | #define WLED_HIGH_POLE_CAP_REG(base) (base + 0x58) |
| 39 | #define WLED_CURR_SINK_MASK 0xE0 |
| 40 | #define WLED_CURR_SINK_SHFT 0x05 |
| 41 | #define WLED_SWITCH_FREQ_MASK 0x02 |
| 42 | #define WLED_OVP_VAL_MASK 0x03 |
| 43 | #define WLED_OVP_VAL_BIT_SHFT 0x00 |
| 44 | #define WLED_BOOST_LIMIT_MASK 0x07 |
| 45 | #define WLED_BOOST_LIMIT_BIT_SHFT 0x00 |
| 46 | #define WLED_BOOST_ON 0x80 |
| 47 | #define WLED_BOOST_OFF 0x00 |
| 48 | #define WLED_EN_MASK 0x80 |
| 49 | #define WLED_NO_MASK 0x00 |
| 50 | #define WLED_CP_SELECT_MAX 0x03 |
| 51 | #define WLED_CP_SELECT_MASK 0x02 |
| 52 | #define WLED_USE_EXT_GEN_MOD_SRC 0x01 |
| 53 | #define WLED_CTL_DLY_STEP 200 |
| 54 | #define WLED_CTL_DLY_MAX 1400 |
| 55 | #define WLED_MAX_CURR 25 |
| 56 | #define WLED_MSB_MASK 0x0F |
| 57 | #define WLED_MAX_CURR_MASK 0x19 |
| 58 | #define WLED_OP_FDBCK_MASK 0x07 |
| 59 | #define WLED_OP_FDBCK_BIT_SHFT 0x00 |
| 60 | |
| 61 | #define WLED_MAX_LEVEL 255 |
| 62 | #define WLED_8_BIT_MASK 0xFF |
| 63 | #define WLED_4_BIT_MASK 0x0F |
| 64 | #define WLED_8_BIT_SHFT 0x08 |
| 65 | #define WLED_MAX_DUTY_CYCLE 0xFFF |
| 66 | |
| 67 | #define WLED_SYNC_VAL 0x07 |
| 68 | #define WLED_SYNC_RESET_VAL 0x00 |
| 69 | |
| 70 | #define WLED_TRIGGER_DEFAULT "none" |
| 71 | #define WLED_FLAGS_DEFAULT 0x00 |
| 72 | #define WLED_DEFAULT_STRINGS 0x01 |
| 73 | #define WLED_DEFAULT_OVP_VAL 0x02 |
| 74 | #define WLED_BOOST_LIM_DEFAULT 0x03 |
| 75 | #define WLED_CP_SEL_DEFAULT 0x00 |
| 76 | #define WLED_CTRL_DLY_DEFAULT 0x00 |
| 77 | #define WLED_SWITCH_FREQ_DEFAULT 0x02 |
| 78 | |
| 79 | /** |
| 80 | * enum qpnp_leds - QPNP supported led ids |
| 81 | * @QPNP_ID_WLED - White led backlight |
| 82 | */ |
| 83 | enum qpnp_leds { |
| 84 | QPNP_ID_WLED, |
| 85 | }; |
| 86 | |
| 87 | /* current boost limit */ |
| 88 | enum wled_current_boost_limit { |
| 89 | WLED_CURR_LIMIT_105mA, |
| 90 | WLED_CURR_LIMIT_385mA, |
| 91 | WLED_CURR_LIMIT_525mA, |
| 92 | WLED_CURR_LIMIT_805mA, |
| 93 | WLED_CURR_LIMIT_980mA, |
| 94 | WLED_CURR_LIMIT_1260mA, |
| 95 | WLED_CURR_LIMIT_1400mA, |
| 96 | WLED_CURR_LIMIT_1680mA, |
| 97 | }; |
| 98 | |
| 99 | /* over voltage protection threshold */ |
| 100 | enum wled_ovp_threshold { |
| 101 | WLED_OVP_35V, |
| 102 | WLED_OVP_32V, |
| 103 | WLED_OVP_29V, |
| 104 | WLED_OVP_37V, |
| 105 | }; |
| 106 | |
| 107 | /* switch frquency */ |
| 108 | enum wled_switch_freq { |
| 109 | WLED_800kHz = 0, |
| 110 | WLED_960kHz, |
| 111 | WLED_1600kHz, |
| 112 | WLED_3200kHz, |
| 113 | }; |
| 114 | |
| 115 | static u8 wled_debug_regs[] = { |
| 116 | /* common registers */ |
| 117 | 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4d, 0x4e, 0x4f, |
| 118 | 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
| 119 | /* LED1 */ |
| 120 | 0x60, 0x61, 0x62, 0x63, 0x66, |
| 121 | /* LED1 */ |
| 122 | 0x70, 0x71, 0x72, 0x73, 0x76, |
| 123 | /* LED1 */ |
| 124 | 0x80, 0x81, 0x82, 0x83, 0x86, |
| 125 | }; |
| 126 | |
| 127 | /** |
| 128 | * wled_config_data - wled configuration data |
| 129 | * @num_strings - number of wled strings supported |
| 130 | * @ovp_val - over voltage protection threshold |
| 131 | * @boost_curr_lim - boot current limit |
| 132 | * @cp_select - high pole capacitance |
| 133 | * @ctrl_delay_us - delay in activation of led |
| 134 | * @dig_mod_gen_en - digital module generator |
| 135 | * @cs_out_en - current sink output enable |
| 136 | * @op_fdbck - selection of output as feedback for the boost |
| 137 | */ |
| 138 | struct wled_config_data { |
| 139 | u8 num_strings; |
| 140 | u8 ovp_val; |
| 141 | u8 boost_curr_lim; |
| 142 | u8 cp_select; |
| 143 | u8 ctrl_delay_us; |
| 144 | u8 switch_freq; |
| 145 | bool dig_mod_gen_en; |
| 146 | bool cs_out_en; |
| 147 | bool op_fdbck; |
| 148 | }; |
| 149 | |
| 150 | /** |
| 151 | * struct qpnp_led_data - internal led data structure |
| 152 | * @led_classdev - led class device |
| 153 | * @id - led index |
| 154 | * @base_reg - base register given in device tree |
| 155 | * @lock - to protect the transactions |
| 156 | * @reg - cached value of led register |
| 157 | * @max_current - maximum current supported by LED |
| 158 | * @default_on - true: default state max, false, default state 0 |
| 159 | */ |
| 160 | struct qpnp_led_data { |
| 161 | struct led_classdev cdev; |
| 162 | struct spmi_device *spmi_dev; |
| 163 | int id; |
| 164 | u16 base; |
| 165 | u8 reg; |
| 166 | struct mutex lock; |
| 167 | struct wled_config_data *wled_cfg; |
| 168 | int max_current; |
| 169 | bool default_on; |
| 170 | }; |
| 171 | |
| 172 | static int |
| 173 | qpnp_led_masked_write(struct qpnp_led_data *led, u16 addr, u8 mask, u8 val) |
| 174 | { |
| 175 | int rc; |
| 176 | u8 reg; |
| 177 | |
| 178 | rc = spmi_ext_register_readl(led->spmi_dev->ctrl, led->spmi_dev->sid, |
| 179 | addr, ®, 1); |
| 180 | if (rc) { |
| 181 | dev_err(&led->spmi_dev->dev, |
| 182 | "Unable to read from addr=%x, rc(%d)\n", addr, rc); |
| 183 | } |
| 184 | |
| 185 | reg &= ~mask; |
| 186 | reg |= val; |
| 187 | |
| 188 | rc = spmi_ext_register_writel(led->spmi_dev->ctrl, led->spmi_dev->sid, |
| 189 | addr, ®, 1); |
| 190 | if (rc) |
| 191 | dev_err(&led->spmi_dev->dev, |
| 192 | "Unable to write to addr=%x, rc(%d)\n", addr, rc); |
| 193 | return rc; |
| 194 | } |
| 195 | |
| 196 | static int qpnp_wled_set(struct qpnp_led_data *led) |
| 197 | { |
| 198 | int rc, duty; |
| 199 | u8 level, val, i, num_wled_strings; |
| 200 | |
| 201 | level = led->cdev.brightness; |
| 202 | |
| 203 | if (level > WLED_MAX_LEVEL) |
| 204 | level = WLED_MAX_LEVEL; |
| 205 | if (level == 0) { |
| 206 | val = WLED_BOOST_OFF; |
| 207 | rc = spmi_ext_register_writel(led->spmi_dev->ctrl, |
| 208 | led->spmi_dev->sid, WLED_MOD_CTRL_REG(led->base), |
| 209 | &val, 1); |
| 210 | if (rc) { |
| 211 | dev_err(&led->spmi_dev->dev, |
| 212 | "WLED write ctrl reg failed(%d)\n", rc); |
| 213 | return rc; |
| 214 | } |
| 215 | } else { |
| 216 | val = WLED_BOOST_ON; |
| 217 | rc = spmi_ext_register_writel(led->spmi_dev->ctrl, |
| 218 | led->spmi_dev->sid, WLED_MOD_CTRL_REG(led->base), |
| 219 | &val, 1); |
| 220 | if (rc) { |
| 221 | dev_err(&led->spmi_dev->dev, |
| 222 | "WLED write ctrl reg failed(%d)\n", rc); |
| 223 | return rc; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | duty = (WLED_MAX_DUTY_CYCLE * level) / WLED_MAX_LEVEL; |
| 228 | |
| 229 | num_wled_strings = led->wled_cfg->num_strings; |
| 230 | |
| 231 | /* program brightness control registers */ |
| 232 | for (i = 0; i < num_wled_strings; i++) { |
| 233 | rc = qpnp_led_masked_write(led, |
| 234 | WLED_BRIGHTNESS_CNTL_MSB(led->base, i), WLED_MSB_MASK, |
| 235 | (duty >> WLED_8_BIT_SHFT) & WLED_4_BIT_MASK); |
| 236 | if (rc) { |
| 237 | dev_err(&led->spmi_dev->dev, |
| 238 | "WLED set brightness MSB failed(%d)\n", rc); |
| 239 | return rc; |
| 240 | } |
| 241 | val = duty & WLED_8_BIT_MASK; |
| 242 | rc = spmi_ext_register_writel(led->spmi_dev->ctrl, |
| 243 | led->spmi_dev->sid, |
| 244 | WLED_BRIGHTNESS_CNTL_LSB(led->base, i), &val, 1); |
| 245 | if (rc) { |
| 246 | dev_err(&led->spmi_dev->dev, |
| 247 | "WLED set brightness LSB failed(%d)\n", rc); |
| 248 | return rc; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | /* sync */ |
| 253 | val = WLED_SYNC_VAL; |
| 254 | rc = spmi_ext_register_writel(led->spmi_dev->ctrl, led->spmi_dev->sid, |
| 255 | WLED_SYNC_REG(led->base), &val, 1); |
| 256 | if (rc) { |
| 257 | dev_err(&led->spmi_dev->dev, |
| 258 | "WLED set sync reg failed(%d)\n", rc); |
| 259 | return rc; |
| 260 | } |
| 261 | |
| 262 | val = WLED_SYNC_RESET_VAL; |
| 263 | rc = spmi_ext_register_writel(led->spmi_dev->ctrl, led->spmi_dev->sid, |
| 264 | WLED_SYNC_REG(led->base), &val, 1); |
| 265 | if (rc) { |
| 266 | dev_err(&led->spmi_dev->dev, |
| 267 | "WLED reset sync reg failed(%d)\n", rc); |
| 268 | return rc; |
| 269 | } |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static void qpnp_wled_dump_regs(struct qpnp_led_data *led) |
| 274 | { |
| 275 | int i; |
| 276 | u8 val; |
| 277 | |
| 278 | pr_debug("===== WLED register dump start =====\n"); |
| 279 | for (i = 0; i < ARRAY_SIZE(wled_debug_regs); i++) { |
| 280 | spmi_ext_register_readl(led->spmi_dev->ctrl, |
| 281 | led->spmi_dev->sid, |
| 282 | led->base + wled_debug_regs[i], |
| 283 | &val, sizeof(val)); |
| 284 | pr_debug("0x%x = 0x%x\n", led->base + wled_debug_regs[i], val); |
| 285 | } |
| 286 | pr_debug("===== WLED register dump end =====\n"); |
| 287 | } |
| 288 | |
| 289 | static void qpnp_led_set(struct led_classdev *led_cdev, |
| 290 | enum led_brightness value) |
| 291 | { |
| 292 | int rc; |
| 293 | struct qpnp_led_data *led; |
| 294 | |
| 295 | led = container_of(led_cdev, struct qpnp_led_data, cdev); |
| 296 | |
| 297 | if (value < LED_OFF || value > led->cdev.max_brightness) { |
| 298 | dev_err(led->cdev.dev, "Invalid brightness value\n"); |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | mutex_lock(&led->lock); |
| 303 | led->cdev.brightness = value; |
| 304 | |
| 305 | switch (led->id) { |
| 306 | case QPNP_ID_WLED: |
| 307 | rc = qpnp_wled_set(led); |
| 308 | if (rc < 0) |
| 309 | dev_err(led->cdev.dev, |
| 310 | "WLED set brightness failed (%d)\n", rc); |
| 311 | break; |
| 312 | default: |
| 313 | dev_err(led->cdev.dev, "Invalid LED(%d)\n", led->id); |
| 314 | break; |
| 315 | } |
| 316 | mutex_unlock(&led->lock); |
| 317 | } |
| 318 | |
| 319 | static int __devinit qpnp_led_set_max_brightness(struct qpnp_led_data *led) |
| 320 | { |
| 321 | switch (led->id) { |
| 322 | case QPNP_ID_WLED: |
| 323 | led->cdev.max_brightness = WLED_MAX_LEVEL; |
| 324 | break; |
| 325 | default: |
| 326 | dev_err(led->cdev.dev, "Invalid LED(%d)\n", led->id); |
| 327 | return -EINVAL; |
| 328 | } |
| 329 | |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static enum led_brightness qpnp_led_get(struct led_classdev *led_cdev) |
| 334 | { |
| 335 | struct qpnp_led_data *led; |
| 336 | |
| 337 | led = container_of(led_cdev, struct qpnp_led_data, cdev); |
| 338 | |
| 339 | return led->cdev.brightness; |
| 340 | } |
| 341 | |
| 342 | static int __devinit qpnp_wled_init(struct qpnp_led_data *led) |
| 343 | { |
| 344 | int rc, i; |
| 345 | u8 num_wled_strings; |
| 346 | |
| 347 | num_wled_strings = led->wled_cfg->num_strings; |
| 348 | |
| 349 | /* verify ranges */ |
| 350 | if (led->wled_cfg->ovp_val > WLED_OVP_37V) { |
| 351 | dev_err(&led->spmi_dev->dev, "Invalid ovp value\n"); |
| 352 | return -EINVAL; |
| 353 | } |
| 354 | |
| 355 | if (led->wled_cfg->boost_curr_lim > WLED_CURR_LIMIT_1680mA) { |
| 356 | dev_err(&led->spmi_dev->dev, "Invalid boost current limit\n"); |
| 357 | return -EINVAL; |
| 358 | } |
| 359 | |
| 360 | if (led->wled_cfg->cp_select > WLED_CP_SELECT_MAX) { |
| 361 | dev_err(&led->spmi_dev->dev, "Invalid pole capacitance\n"); |
| 362 | return -EINVAL; |
| 363 | } |
| 364 | |
| 365 | if ((led->max_current > WLED_MAX_CURR)) { |
| 366 | dev_err(&led->spmi_dev->dev, "Invalid max current\n"); |
| 367 | return -EINVAL; |
| 368 | } |
| 369 | |
| 370 | if ((led->wled_cfg->ctrl_delay_us % WLED_CTL_DLY_STEP) || |
| 371 | (led->wled_cfg->ctrl_delay_us > WLED_CTL_DLY_MAX)) { |
| 372 | dev_err(&led->spmi_dev->dev, "Invalid control delay\n"); |
| 373 | return -EINVAL; |
| 374 | } |
| 375 | |
| 376 | /* program over voltage protection threshold */ |
| 377 | rc = qpnp_led_masked_write(led, WLED_OVP_CFG_REG(led->base), |
| 378 | WLED_OVP_VAL_MASK, |
| 379 | (led->wled_cfg->ovp_val << WLED_OVP_VAL_BIT_SHFT)); |
| 380 | if (rc) { |
| 381 | dev_err(&led->spmi_dev->dev, |
| 382 | "WLED OVP reg write failed(%d)\n", rc); |
| 383 | return rc; |
| 384 | } |
| 385 | |
| 386 | /* program current boost limit */ |
| 387 | rc = qpnp_led_masked_write(led, WLED_BOOST_LIMIT_REG(led->base), |
| 388 | WLED_BOOST_LIMIT_MASK, led->wled_cfg->boost_curr_lim); |
| 389 | if (rc) { |
| 390 | dev_err(&led->spmi_dev->dev, |
| 391 | "WLED boost limit reg write failed(%d)\n", rc); |
| 392 | return rc; |
| 393 | } |
| 394 | |
| 395 | /* program output feedback */ |
| 396 | rc = qpnp_led_masked_write(led, WLED_FDBCK_CTRL_REG(led->base), |
| 397 | WLED_OP_FDBCK_MASK, |
| 398 | (led->wled_cfg->op_fdbck << WLED_OP_FDBCK_BIT_SHFT)); |
| 399 | if (rc) { |
| 400 | dev_err(&led->spmi_dev->dev, |
| 401 | "WLED fdbck ctrl reg write failed(%d)\n", rc); |
| 402 | return rc; |
| 403 | } |
| 404 | |
| 405 | /* program switch frequency */ |
| 406 | rc = qpnp_led_masked_write(led, WLED_SWITCHING_FREQ_REG(led->base), |
| 407 | WLED_SWITCH_FREQ_MASK, led->wled_cfg->switch_freq); |
| 408 | if (rc) { |
| 409 | dev_err(&led->spmi_dev->dev, |
| 410 | "WLED switch freq reg write failed(%d)\n", rc); |
| 411 | return rc; |
| 412 | } |
| 413 | |
| 414 | /* program current sink */ |
| 415 | if (led->wled_cfg->cs_out_en) { |
| 416 | rc = qpnp_led_masked_write(led, WLED_CURR_SINK_REG(led->base), |
| 417 | WLED_CURR_SINK_MASK, |
| 418 | (led->wled_cfg->num_strings << WLED_CURR_SINK_SHFT)); |
| 419 | if (rc) { |
| 420 | dev_err(&led->spmi_dev->dev, |
| 421 | "WLED curr sink reg write failed(%d)\n", rc); |
| 422 | return rc; |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | /* program high pole capacitance */ |
| 427 | rc = qpnp_led_masked_write(led, WLED_HIGH_POLE_CAP_REG(led->base), |
| 428 | WLED_CP_SELECT_MASK, led->wled_cfg->cp_select); |
| 429 | if (rc) { |
| 430 | dev_err(&led->spmi_dev->dev, |
| 431 | "WLED pole cap reg write failed(%d)\n", rc); |
| 432 | return rc; |
| 433 | } |
| 434 | |
| 435 | /* program modulator, current mod src and cabc */ |
| 436 | for (i = 0; i < num_wled_strings; i++) { |
| 437 | rc = qpnp_led_masked_write(led, WLED_MOD_EN_REG(led->base, i), |
| 438 | WLED_NO_MASK, WLED_EN_MASK); |
| 439 | if (rc) { |
| 440 | dev_err(&led->spmi_dev->dev, |
| 441 | "WLED mod enable reg write failed(%d)\n", rc); |
| 442 | return rc; |
| 443 | } |
| 444 | |
| 445 | if (led->wled_cfg->dig_mod_gen_en) { |
| 446 | rc = qpnp_led_masked_write(led, |
| 447 | WLED_MOD_EN_REG(led->base, i), |
| 448 | WLED_NO_MASK, WLED_USE_EXT_GEN_MOD_SRC); |
| 449 | if (rc) { |
| 450 | dev_err(&led->spmi_dev->dev, |
| 451 | "WLED dig mod en reg write failed(%d)\n", rc); |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | rc = qpnp_led_masked_write(led, |
| 456 | WLED_FULL_SCALE_REG(led->base, i), WLED_MAX_CURR_MASK, |
| 457 | led->max_current); |
| 458 | if (rc) { |
| 459 | dev_err(&led->spmi_dev->dev, |
| 460 | "WLED max current reg write failed(%d)\n", rc); |
| 461 | return rc; |
| 462 | } |
| 463 | |
| 464 | } |
| 465 | |
| 466 | /* dump wled registers */ |
| 467 | qpnp_wled_dump_regs(led); |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | static int __devinit qpnp_led_initialize(struct qpnp_led_data *led) |
| 473 | { |
| 474 | int rc; |
| 475 | |
| 476 | switch (led->id) { |
| 477 | case QPNP_ID_WLED: |
| 478 | rc = qpnp_wled_init(led); |
| 479 | if (rc) |
| 480 | dev_err(led->cdev.dev, |
| 481 | "WLED initialize failed(%d)\n", rc); |
| 482 | break; |
| 483 | default: |
| 484 | dev_err(led->cdev.dev, "Invalid LED(%d)\n", led->id); |
| 485 | rc = -EINVAL; |
| 486 | } |
| 487 | |
| 488 | return rc; |
| 489 | } |
| 490 | |
| 491 | /* |
| 492 | * Handlers for alternative sources of platform_data |
| 493 | */ |
| 494 | static int __devinit qpnp_get_config_wled(struct qpnp_led_data *led, |
| 495 | struct device_node *node) |
| 496 | { |
| 497 | u32 val; |
| 498 | int rc; |
| 499 | const char *temp_string; |
| 500 | |
| 501 | led->id = QPNP_ID_WLED; |
| 502 | |
| 503 | led->wled_cfg = devm_kzalloc(&led->spmi_dev->dev, |
| 504 | sizeof(struct wled_config_data), GFP_KERNEL); |
| 505 | if (!led->wled_cfg) { |
| 506 | dev_err(&led->spmi_dev->dev, "Unable to allocate memory\n"); |
| 507 | return -ENOMEM; |
| 508 | } |
| 509 | |
| 510 | led->cdev.default_trigger = WLED_TRIGGER_DEFAULT; |
| 511 | rc = of_property_read_string(node, "linux,default-trigger", |
| 512 | &temp_string); |
| 513 | if (!rc) |
| 514 | led->cdev.default_trigger = temp_string; |
| 515 | else if (rc != -EINVAL) |
| 516 | return rc; |
| 517 | |
| 518 | |
| 519 | led->cdev.flags = WLED_FLAGS_DEFAULT; |
| 520 | rc = of_property_read_u32(node, "qcom,flags", &val); |
| 521 | if (!rc) |
| 522 | led->cdev.flags = (int) val; |
| 523 | else if (rc != -EINVAL) |
| 524 | return rc; |
| 525 | |
| 526 | led->default_on = true; |
| 527 | rc = of_property_read_string(node, "qcom,default-state", |
| 528 | &temp_string); |
| 529 | if (!rc) { |
| 530 | if (!strncmp(temp_string, "off", sizeof("off"))) |
| 531 | led->default_on = false; |
| 532 | } else if (rc != -EINVAL) |
| 533 | return rc; |
| 534 | |
| 535 | led->wled_cfg->num_strings = WLED_DEFAULT_STRINGS; |
| 536 | rc = of_property_read_u32(node, "qcom,num-strings", &val); |
| 537 | if (!rc) |
| 538 | led->wled_cfg->num_strings = (u8) val; |
| 539 | else if (rc != -EINVAL) |
| 540 | return rc; |
| 541 | |
| 542 | led->wled_cfg->ovp_val = WLED_DEFAULT_OVP_VAL; |
| 543 | rc = of_property_read_u32(node, "qcom,ovp-val", &val); |
| 544 | if (!rc) |
| 545 | led->wled_cfg->ovp_val = (u8) val; |
| 546 | else if (rc != -EINVAL) |
| 547 | return rc; |
| 548 | |
| 549 | led->wled_cfg->boost_curr_lim = WLED_BOOST_LIM_DEFAULT; |
| 550 | rc = of_property_read_u32(node, "qcom,boost-curr-lim", &val); |
| 551 | if (!rc) |
| 552 | led->wled_cfg->boost_curr_lim = (u8) val; |
| 553 | else if (rc != -EINVAL) |
| 554 | return rc; |
| 555 | |
| 556 | led->wled_cfg->cp_select = WLED_CP_SEL_DEFAULT; |
| 557 | rc = of_property_read_u32(node, "qcom,cp-sel", &val); |
| 558 | if (!rc) |
| 559 | led->wled_cfg->cp_select = (u8) val; |
| 560 | else if (rc != -EINVAL) |
| 561 | return rc; |
| 562 | |
| 563 | led->wled_cfg->ctrl_delay_us = WLED_CTRL_DLY_DEFAULT; |
| 564 | rc = of_property_read_u32(node, "qcom,ctrl-delay-us", &val); |
| 565 | if (!rc) |
| 566 | led->wled_cfg->ctrl_delay_us = (u8) val; |
| 567 | else if (rc != -EINVAL) |
| 568 | return rc; |
| 569 | |
| 570 | led->wled_cfg->switch_freq = WLED_SWITCH_FREQ_DEFAULT; |
| 571 | rc = of_property_read_u32(node, "qcom,switch-freq", &val); |
| 572 | if (!rc) |
| 573 | led->wled_cfg->switch_freq = (u8) val; |
| 574 | else if (rc != -EINVAL) |
| 575 | return rc; |
| 576 | |
| 577 | led->wled_cfg->dig_mod_gen_en = |
| 578 | of_property_read_bool(node, "qcom,dig-mod-gen-en"); |
| 579 | |
| 580 | led->wled_cfg->cs_out_en = |
| 581 | of_property_read_bool(node, "qcom,cs-out-en"); |
| 582 | |
| 583 | led->wled_cfg->op_fdbck = |
| 584 | of_property_read_bool(node, "qcom,op-fdbck"); |
| 585 | |
| 586 | return 0; |
| 587 | } |
| 588 | |
| 589 | static int __devinit qpnp_leds_probe(struct spmi_device *spmi) |
| 590 | { |
| 591 | struct qpnp_led_data *led; |
| 592 | struct resource *led_resource; |
| 593 | struct device_node *node; |
| 594 | int rc; |
| 595 | const char *led_label; |
| 596 | |
| 597 | led = devm_kzalloc(&spmi->dev, (sizeof(struct qpnp_led_data)), |
| 598 | GFP_KERNEL); |
| 599 | if (!led) { |
| 600 | dev_err(&spmi->dev, "Unable to allocate memory\n"); |
| 601 | return -ENOMEM; |
| 602 | } |
| 603 | |
| 604 | led->spmi_dev = spmi; |
| 605 | |
| 606 | led_resource = spmi_get_resource(spmi, NULL, IORESOURCE_MEM, 0); |
| 607 | if (!led_resource) { |
| 608 | dev_err(&spmi->dev, "Unable to get LED base address\n"); |
| 609 | return -ENXIO; |
| 610 | } |
| 611 | led->base = led_resource->start; |
| 612 | |
| 613 | dev_set_drvdata(&spmi->dev, led); |
| 614 | |
| 615 | node = led->spmi_dev->dev.of_node; |
| 616 | if (node == NULL) |
| 617 | return -ENODEV; |
| 618 | |
| 619 | rc = of_property_read_string(node, "qcom,label", &led_label); |
| 620 | if (rc < 0) { |
| 621 | dev_err(&led->spmi_dev->dev, |
| 622 | "Failure reading label, rc = %d\n", rc); |
| 623 | return rc; |
| 624 | } |
| 625 | |
| 626 | rc = of_property_read_string(node, "qcom,name", &led->cdev.name); |
| 627 | if (rc < 0) { |
| 628 | dev_err(&led->spmi_dev->dev, |
| 629 | "Failure reading led name, rc = %d\n", rc); |
| 630 | return rc; |
| 631 | } |
| 632 | |
| 633 | rc = of_property_read_u32(node, "qcom,max-current", &led->max_current); |
| 634 | if (rc < 0) { |
| 635 | dev_err(&led->spmi_dev->dev, |
| 636 | "Failure reading max_current, rc = %d\n", rc); |
| 637 | return rc; |
| 638 | } |
| 639 | |
| 640 | led->cdev.brightness_set = qpnp_led_set; |
| 641 | led->cdev.brightness_get = qpnp_led_get; |
| 642 | led->cdev.brightness = LED_OFF; |
| 643 | |
| 644 | if (strncmp(led_label, "wled", sizeof("wled")) == 0) { |
| 645 | rc = qpnp_get_config_wled(led, node); |
| 646 | if (rc < 0) { |
| 647 | dev_err(&led->spmi_dev->dev, |
| 648 | "Unable to read wled config data\n"); |
| 649 | return rc; |
| 650 | } |
| 651 | } else { |
| 652 | dev_err(&led->spmi_dev->dev, "No LED matching label\n"); |
| 653 | return -EINVAL; |
| 654 | } |
| 655 | |
| 656 | mutex_init(&led->lock); |
| 657 | |
| 658 | rc = qpnp_led_initialize(led); |
| 659 | if (rc < 0) |
| 660 | goto fail_id_check; |
| 661 | |
| 662 | rc = qpnp_led_set_max_brightness(led); |
| 663 | if (rc < 0) |
| 664 | goto fail_id_check; |
| 665 | |
| 666 | |
| 667 | rc = led_classdev_register(&spmi->dev, &led->cdev); |
| 668 | if (rc) { |
| 669 | dev_err(&spmi->dev, "unable to register led %d,rc=%d\n", |
| 670 | led->id, rc); |
| 671 | goto fail_id_check; |
| 672 | } |
| 673 | |
| 674 | /* configure default state */ |
| 675 | if (led->default_on) |
| 676 | led->cdev.brightness = led->cdev.max_brightness; |
| 677 | |
| 678 | qpnp_led_set(&led->cdev, led->cdev.brightness); |
| 679 | |
| 680 | return 0; |
| 681 | |
| 682 | fail_id_check: |
| 683 | mutex_destroy(&led->lock); |
| 684 | led_classdev_unregister(&led->cdev); |
| 685 | return rc; |
| 686 | } |
| 687 | |
| 688 | static int __devexit qpnp_leds_remove(struct spmi_device *spmi) |
| 689 | { |
| 690 | struct qpnp_led_data *led = dev_get_drvdata(&spmi->dev); |
| 691 | |
| 692 | mutex_destroy(&led->lock); |
| 693 | led_classdev_unregister(&led->cdev); |
| 694 | |
| 695 | return 0; |
| 696 | } |
| 697 | static struct of_device_id spmi_match_table[] = { |
| 698 | { .compatible = "qcom,leds-qpnp", |
| 699 | } |
| 700 | }; |
| 701 | |
| 702 | static struct spmi_driver qpnp_leds_driver = { |
| 703 | .driver = { |
| 704 | .name = "qcom,leds-qpnp", |
| 705 | .of_match_table = spmi_match_table, |
| 706 | }, |
| 707 | .probe = qpnp_leds_probe, |
| 708 | .remove = __devexit_p(qpnp_leds_remove), |
| 709 | }; |
| 710 | |
| 711 | static int __init qpnp_led_init(void) |
| 712 | { |
| 713 | return spmi_driver_register(&qpnp_leds_driver); |
| 714 | } |
| 715 | module_init(qpnp_led_init); |
| 716 | |
| 717 | static void __exit qpnp_led_exit(void) |
| 718 | { |
| 719 | spmi_driver_unregister(&qpnp_leds_driver); |
| 720 | } |
| 721 | module_exit(qpnp_led_exit); |
| 722 | |
| 723 | MODULE_DESCRIPTION("QPNP LEDs driver"); |
| 724 | MODULE_LICENSE("GPL v2"); |
| 725 | MODULE_ALIAS("leds:leds-qpnp"); |