drivers/mfd/palmas.c

   1 /*
   2  * TI Palmas MFD Driver
   3  *
   4  * Copyright 2011-2012 Texas Instruments Inc.
   5  *
   6  * Author: Graeme Gregory <gg@slimlogic.co.uk>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify it
   9  *  under  the terms of the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the License, or (at your
  11  *  option) any later version.
  12  *
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/slab.h>
  19 #include <linux/i2c.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/irq.h>
  22 #include <linux/regmap.h>
  23 #include <linux/err.h>
  24 #include <linux/mfd/core.h>
  25 #include <linux/mfd/palmas.h>
  26
  27 enum palmas_ids {
  28         PALMAS_PMIC_ID,
  29         PALMAS_GPIO_ID,
  30         PALMAS_LEDS_ID,
  31         PALMAS_WDT_ID,
  32         PALMAS_RTC_ID,
  33         PALMAS_PWRBUTTON_ID,
  34         PALMAS_GPADC_ID,
  35         PALMAS_RESOURCE_ID,
  36         PALMAS_CLK_ID,
  37         PALMAS_PWM_ID,
  38         PALMAS_USB_ID,
  39 };
  40
  41 static const struct mfd_cell palmas_children[] = {
  42         {
  43                 .name = "palmas-pmic",
  44                 .id = PALMAS_PMIC_ID,
  45         },
  46         {
  47                 .name = "palmas-gpio",
  48                 .id = PALMAS_GPIO_ID,
  49         },
  50         {
  51                 .name = "palmas-leds",
  52                 .id = PALMAS_LEDS_ID,
  53         },
  54         {
  55                 .name = "palmas-wdt",
  56                 .id = PALMAS_WDT_ID,
  57         },
  58         {
  59                 .name = "palmas-rtc",
  60                 .id = PALMAS_RTC_ID,
  61         },
  62         {
  63                 .name = "palmas-pwrbutton",
  64                 .id = PALMAS_PWRBUTTON_ID,
  65         },
  66         {
  67                 .name = "palmas-gpadc",
  68                 .id = PALMAS_GPADC_ID,
  69         },
  70         {
  71                 .name = "palmas-resource",
  72                 .id = PALMAS_RESOURCE_ID,
  73         },
  74         {
  75                 .name = "palmas-clk",
  76                 .id = PALMAS_CLK_ID,
  77         },
  78         {
  79                 .name = "palmas-pwm",
  80                 .id = PALMAS_PWM_ID,
  81         },
  82         {
  83                 .name = "palmas-usb",
  84                 .id = PALMAS_USB_ID,
  85         }
  86 };
  87
  88 static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
  89         {
  90                 .reg_bits = 8,
  91                 .val_bits = 8,
  92                 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
  93                                         PALMAS_PRIMARY_SECONDARY_PAD3),
  94         },
  95         {
  96                 .reg_bits = 8,
  97                 .val_bits = 8,
  98                 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
  99                                         PALMAS_GPADC_SMPS_VSEL_MONITORING),
 100         },
 101         {
 102                 .reg_bits = 8,
 103                 .val_bits = 8,
 104                 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
 105                                         PALMAS_GPADC_TRIM16),
 106         },
 107 };
 108
 109 static const struct regmap_irq palmas_irqs[] = {
 110         /* INT1 IRQs */
 111         [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
 112                 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
 113         },
 114         [PALMAS_PWRON_IRQ] = {
 115                 .mask = PALMAS_INT1_STATUS_PWRON,
 116         },
 117         [PALMAS_LONG_PRESS_KEY_IRQ] = {
 118                 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
 119         },
 120         [PALMAS_RPWRON_IRQ] = {
 121                 .mask = PALMAS_INT1_STATUS_RPWRON,
 122         },
 123         [PALMAS_PWRDOWN_IRQ] = {
 124                 .mask = PALMAS_INT1_STATUS_PWRDOWN,
 125         },
 126         [PALMAS_HOTDIE_IRQ] = {
 127                 .mask = PALMAS_INT1_STATUS_HOTDIE,
 128         },
 129         [PALMAS_VSYS_MON_IRQ] = {
 130                 .mask = PALMAS_INT1_STATUS_VSYS_MON,
 131         },
 132         [PALMAS_VBAT_MON_IRQ] = {
 133                 .mask = PALMAS_INT1_STATUS_VBAT_MON,
 134         },
 135         /* INT2 IRQs*/
 136         [PALMAS_RTC_ALARM_IRQ] = {
 137                 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
 138                 .reg_offset = 1,
 139         },
 140         [PALMAS_RTC_TIMER_IRQ] = {
 141                 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
 142                 .reg_offset = 1,
 143         },
 144         [PALMAS_WDT_IRQ] = {
 145                 .mask = PALMAS_INT2_STATUS_WDT,
 146                 .reg_offset = 1,
 147         },
 148         [PALMAS_BATREMOVAL_IRQ] = {
 149                 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
 150                 .reg_offset = 1,
 151         },
 152         [PALMAS_RESET_IN_IRQ] = {
 153                 .mask = PALMAS_INT2_STATUS_RESET_IN,
 154                 .reg_offset = 1,
 155         },
 156         [PALMAS_FBI_BB_IRQ] = {
 157                 .mask = PALMAS_INT2_STATUS_FBI_BB,
 158                 .reg_offset = 1,
 159         },
 160         [PALMAS_SHORT_IRQ] = {
 161                 .mask = PALMAS_INT2_STATUS_SHORT,
 162                 .reg_offset = 1,
 163         },
 164         [PALMAS_VAC_ACOK_IRQ] = {
 165                 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
 166                 .reg_offset = 1,
 167         },
 168         /* INT3 IRQs */
 169         [PALMAS_GPADC_AUTO_0_IRQ] = {
 170                 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
 171                 .reg_offset = 2,
 172         },
 173         [PALMAS_GPADC_AUTO_1_IRQ] = {
 174                 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
 175                 .reg_offset = 2,
 176         },
 177         [PALMAS_GPADC_EOC_SW_IRQ] = {
 178                 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
 179                 .reg_offset = 2,
 180         },
 181         [PALMAS_GPADC_EOC_RT_IRQ] = {
 182                 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
 183                 .reg_offset = 2,
 184         },
 185         [PALMAS_ID_OTG_IRQ] = {
 186                 .mask = PALMAS_INT3_STATUS_ID_OTG,
 187                 .reg_offset = 2,
 188         },
 189         [PALMAS_ID_IRQ] = {
 190                 .mask = PALMAS_INT3_STATUS_ID,
 191                 .reg_offset = 2,
 192         },
 193         [PALMAS_VBUS_OTG_IRQ] = {
 194                 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
 195                 .reg_offset = 2,
 196         },
 197         [PALMAS_VBUS_IRQ] = {
 198                 .mask = PALMAS_INT3_STATUS_VBUS,
 199                 .reg_offset = 2,
 200         },
 201         /* INT4 IRQs */
 202         [PALMAS_GPIO_0_IRQ] = {
 203                 .mask = PALMAS_INT4_STATUS_GPIO_0,
 204                 .reg_offset = 3,
 205         },
 206         [PALMAS_GPIO_1_IRQ] = {
 207                 .mask = PALMAS_INT4_STATUS_GPIO_1,
 208                 .reg_offset = 3,
 209         },
 210         [PALMAS_GPIO_2_IRQ] = {
 211                 .mask = PALMAS_INT4_STATUS_GPIO_2,
 212                 .reg_offset = 3,
 213         },
 214         [PALMAS_GPIO_3_IRQ] = {
 215                 .mask = PALMAS_INT4_STATUS_GPIO_3,
 216                 .reg_offset = 3,
 217         },
 218         [PALMAS_GPIO_4_IRQ] = {
 219                 .mask = PALMAS_INT4_STATUS_GPIO_4,
 220                 .reg_offset = 3,
 221         },
 222         [PALMAS_GPIO_5_IRQ] = {
 223                 .mask = PALMAS_INT4_STATUS_GPIO_5,
 224                 .reg_offset = 3,
 225         },
 226         [PALMAS_GPIO_6_IRQ] = {
 227                 .mask = PALMAS_INT4_STATUS_GPIO_6,
 228                 .reg_offset = 3,
 229         },
 230         [PALMAS_GPIO_7_IRQ] = {
 231                 .mask = PALMAS_INT4_STATUS_GPIO_7,
 232                 .reg_offset = 3,
 233         },
 234 };
 235
 236 static struct regmap_irq_chip palmas_irq_chip = {
 237         .name = "palmas",
 238         .irqs = palmas_irqs,
 239         .num_irqs = ARRAY_SIZE(palmas_irqs),
 240
 241         .num_regs = 4,
 242         .irq_reg_stride = 5,
 243         .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 244                         PALMAS_INT1_STATUS),
 245         .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 246                         PALMAS_INT1_MASK),
 247 };
 248
 249 static int __devinit palmas_i2c_probe(struct i2c_client *i2c,
 250                             const struct i2c_device_id *id)
 251 {
 252         struct palmas *palmas;
 253         struct palmas_platform_data *pdata;
 254         int ret = 0, i;
 255         unsigned int reg, addr;
 256         int slave;
 257         struct mfd_cell *children;
 258
 259         pdata = dev_get_platdata(&i2c->dev);
 260         if (!pdata)
 261                 return -EINVAL;
 262
 263         palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
 264         if (palmas == NULL)
 265                 return -ENOMEM;
 266
 267         i2c_set_clientdata(i2c, palmas);
 268         palmas->dev = &i2c->dev;
 269         palmas->id = id->driver_data;
 270         palmas->irq = i2c->irq;
 271
 272         for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
 273                 if (i == 0)
 274                         palmas->i2c_clients[i] = i2c;
 275                 else {
 276                         palmas->i2c_clients[i] =
 277                                         i2c_new_dummy(i2c->adapter,
 278                                                         i2c->addr + i);
 279                         if (!palmas->i2c_clients[i]) {
 280                                 dev_err(palmas->dev,
 281                                         "can't attach client %d\n", i);
 282                                 ret = -ENOMEM;
 283                                 goto err;
 284                         }
 285                 }
 286                 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
 287                                 &palmas_regmap_config[i]);
 288                 if (IS_ERR(palmas->regmap[i])) {
 289                         ret = PTR_ERR(palmas->regmap[i]);
 290                         dev_err(palmas->dev,
 291                                 "Failed to allocate regmap %d, err: %d\n",
 292                                 i, ret);
 293                         goto err;
 294                 }
 295         }
 296
 297         /* Change IRQ into clear on read mode for efficiency */
 298         slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
 299         addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
 300         reg = PALMAS_INT_CTRL_INT_CLEAR;
 301
 302         regmap_write(palmas->regmap[slave], addr, reg);
 303
 304         ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
 305                         IRQF_ONESHOT | IRQF_TRIGGER_LOW, 0, &palmas_irq_chip,
 306                         &palmas->irq_data);
 307         if (ret < 0)
 308                 goto err;
 309
 310         slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
 311         addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 312                         PALMAS_PRIMARY_SECONDARY_PAD1);
 313
 314         if (pdata->mux_from_pdata) {
 315                 reg = pdata->pad1;
 316                 ret = regmap_write(palmas->regmap[slave], addr, reg);
 317                 if (ret)
 318                         goto err_irq;
 319         } else {
 320                 ret = regmap_read(palmas->regmap[slave], addr, &reg);
 321                 if (ret)
 322                         goto err_irq;
 323         }
 324
 325         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
 326                 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
 327         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
 328                 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
 329         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 330                         (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 331                 palmas->led_muxed |= PALMAS_LED1_MUXED;
 332         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 333                         (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 334                 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
 335         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
 336                 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
 337         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 338                         (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 339                 palmas->led_muxed |= PALMAS_LED2_MUXED;
 340         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 341                         (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 342                 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
 343         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
 344                 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
 345
 346         addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 347                         PALMAS_PRIMARY_SECONDARY_PAD2);
 348
 349         if (pdata->mux_from_pdata) {
 350                 reg = pdata->pad2;
 351                 ret = regmap_write(palmas->regmap[slave], addr, reg);
 352                 if (ret)
 353                         goto err_irq;
 354         } else {
 355                 ret = regmap_read(palmas->regmap[slave], addr, &reg);
 356                 if (ret)
 357                         goto err_irq;
 358         }
 359
 360         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
 361                 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
 362         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
 363                 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
 364         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
 365                 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
 366         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
 367                 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
 368
 369         dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
 370                         palmas->gpio_muxed, palmas->pwm_muxed,
 371                         palmas->led_muxed);
 372
 373         reg = pdata->power_ctrl;
 374
 375         slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
 376         addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
 377
 378         ret = regmap_write(palmas->regmap[slave], addr, reg);
 379         if (ret)
 380                 goto err_irq;
 381
 382         children = kmemdup(palmas_children, sizeof(palmas_children),
 383                            GFP_KERNEL);
 384         if (!children) {
 385                 ret = -ENOMEM;
 386                 goto err_irq;
 387         }
 388
 389         children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
 390         children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
 391
 392         children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
 393         children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
 394
 395         children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
 396         children[PALMAS_RESOURCE_ID].pdata_size =
 397                         sizeof(*pdata->resource_pdata);
 398
 399         children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
 400         children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
 401
 402         children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
 403         children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
 404
 405         ret = mfd_add_devices(palmas->dev, -1,
 406                               children, ARRAY_SIZE(palmas_children),
 407                               NULL, regmap_irq_chip_get_base(palmas->irq_data),
 408                               NULL);
 409         kfree(children);
 410
 411         if (ret < 0)
 412                 goto err_devices;
 413
 414         return ret;
 415
 416 err_devices:
 417         mfd_remove_devices(palmas->dev);
 418 err_irq:
 419         regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 420 err:
 421         return ret;
 422 }
 423
 424 static int palmas_i2c_remove(struct i2c_client *i2c)
 425 {
 426         struct palmas *palmas = i2c_get_clientdata(i2c);
 427
 428         mfd_remove_devices(palmas->dev);
 429         regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 430
 431         return 0;
 432 }
 433
 434 static const struct i2c_device_id palmas_i2c_id[] = {
 435         { "palmas", },
 436         { "twl6035", },
 437         { "twl6037", },
 438         { "tps65913", },
 439         { /* end */ }
 440 };
 441 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 442
 443 static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
 444         { .compatible = "ti,palmas", },
 445         { /* end */ }
 446 };
 447
 448 static struct i2c_driver palmas_i2c_driver = {
 449         .driver = {
 450                    .name = "palmas",
 451                    .of_match_table = of_palmas_match_tbl,
 452                    .owner = THIS_MODULE,
 453         },
 454         .probe = palmas_i2c_probe,
 455         .remove = palmas_i2c_remove,
 456         .id_table = palmas_i2c_id,
 457 };
 458
 459 static int __init palmas_i2c_init(void)
 460 {
 461         return i2c_add_driver(&palmas_i2c_driver);
 462 }
 463 /* init early so consumer devices can complete system boot */
 464 subsys_initcall(palmas_i2c_init);
 465
 466 static void __exit palmas_i2c_exit(void)
 467 {
 468         i2c_del_driver(&palmas_i2c_driver);
 469 }
 470 module_exit(palmas_i2c_exit);
 471
 472 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 473 MODULE_DESCRIPTION("Palmas chip family multi-function driver");
 474 MODULE_LICENSE("GPL");