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 #include <linux/of_platform.h>
  27
  28 enum palmas_ids {
  29         PALMAS_PMIC_ID,
  30         PALMAS_GPIO_ID,
  31         PALMAS_LEDS_ID,
  32         PALMAS_WDT_ID,
  33         PALMAS_RTC_ID,
  34         PALMAS_PWRBUTTON_ID,
  35         PALMAS_GPADC_ID,
  36         PALMAS_RESOURCE_ID,
  37         PALMAS_CLK_ID,
  38         PALMAS_PWM_ID,
  39         PALMAS_USB_ID,
  40 };
  41
  42 static const struct mfd_cell palmas_children[] = {
  43         {
  44                 .name = "palmas-pmic",
  45                 .id = PALMAS_PMIC_ID,
  46         },
  47         {
  48                 .name = "palmas-gpio",
  49                 .id = PALMAS_GPIO_ID,
  50         },
  51         {
  52                 .name = "palmas-leds",
  53                 .id = PALMAS_LEDS_ID,
  54         },
  55         {
  56                 .name = "palmas-wdt",
  57                 .id = PALMAS_WDT_ID,
  58         },
  59         {
  60                 .name = "palmas-rtc",
  61                 .id = PALMAS_RTC_ID,
  62         },
  63         {
  64                 .name = "palmas-pwrbutton",
  65                 .id = PALMAS_PWRBUTTON_ID,
  66         },
  67         {
  68                 .name = "palmas-gpadc",
  69                 .id = PALMAS_GPADC_ID,
  70         },
  71         {
  72                 .name = "palmas-resource",
  73                 .id = PALMAS_RESOURCE_ID,
  74         },
  75         {
  76                 .name = "palmas-clk",
  77                 .id = PALMAS_CLK_ID,
  78         },
  79         {
  80                 .name = "palmas-pwm",
  81                 .id = PALMAS_PWM_ID,
  82         },
  83         {
  84                 .name = "palmas-usb",
  85                 .id = PALMAS_USB_ID,
  86         }
  87 };
  88
  89 static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
  90         {
  91                 .reg_bits = 8,
  92                 .val_bits = 8,
  93                 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
  94                                         PALMAS_PRIMARY_SECONDARY_PAD3),
  95         },
  96         {
  97                 .reg_bits = 8,
  98                 .val_bits = 8,
  99                 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
 100                                         PALMAS_GPADC_SMPS_VSEL_MONITORING),
 101         },
 102         {
 103                 .reg_bits = 8,
 104                 .val_bits = 8,
 105                 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
 106                                         PALMAS_GPADC_TRIM16),
 107         },
 108 };
 109
 110 static const struct regmap_irq palmas_irqs[] = {
 111         /* INT1 IRQs */
 112         [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
 113                 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
 114         },
 115         [PALMAS_PWRON_IRQ] = {
 116                 .mask = PALMAS_INT1_STATUS_PWRON,
 117         },
 118         [PALMAS_LONG_PRESS_KEY_IRQ] = {
 119                 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
 120         },
 121         [PALMAS_RPWRON_IRQ] = {
 122                 .mask = PALMAS_INT1_STATUS_RPWRON,
 123         },
 124         [PALMAS_PWRDOWN_IRQ] = {
 125                 .mask = PALMAS_INT1_STATUS_PWRDOWN,
 126         },
 127         [PALMAS_HOTDIE_IRQ] = {
 128                 .mask = PALMAS_INT1_STATUS_HOTDIE,
 129         },
 130         [PALMAS_VSYS_MON_IRQ] = {
 131                 .mask = PALMAS_INT1_STATUS_VSYS_MON,
 132         },
 133         [PALMAS_VBAT_MON_IRQ] = {
 134                 .mask = PALMAS_INT1_STATUS_VBAT_MON,
 135         },
 136         /* INT2 IRQs*/
 137         [PALMAS_RTC_ALARM_IRQ] = {
 138                 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
 139                 .reg_offset = 1,
 140         },
 141         [PALMAS_RTC_TIMER_IRQ] = {
 142                 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
 143                 .reg_offset = 1,
 144         },
 145         [PALMAS_WDT_IRQ] = {
 146                 .mask = PALMAS_INT2_STATUS_WDT,
 147                 .reg_offset = 1,
 148         },
 149         [PALMAS_BATREMOVAL_IRQ] = {
 150                 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
 151                 .reg_offset = 1,
 152         },
 153         [PALMAS_RESET_IN_IRQ] = {
 154                 .mask = PALMAS_INT2_STATUS_RESET_IN,
 155                 .reg_offset = 1,
 156         },
 157         [PALMAS_FBI_BB_IRQ] = {
 158                 .mask = PALMAS_INT2_STATUS_FBI_BB,
 159                 .reg_offset = 1,
 160         },
 161         [PALMAS_SHORT_IRQ] = {
 162                 .mask = PALMAS_INT2_STATUS_SHORT,
 163                 .reg_offset = 1,
 164         },
 165         [PALMAS_VAC_ACOK_IRQ] = {
 166                 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
 167                 .reg_offset = 1,
 168         },
 169         /* INT3 IRQs */
 170         [PALMAS_GPADC_AUTO_0_IRQ] = {
 171                 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
 172                 .reg_offset = 2,
 173         },
 174         [PALMAS_GPADC_AUTO_1_IRQ] = {
 175                 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
 176                 .reg_offset = 2,
 177         },
 178         [PALMAS_GPADC_EOC_SW_IRQ] = {
 179                 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
 180                 .reg_offset = 2,
 181         },
 182         [PALMAS_GPADC_EOC_RT_IRQ] = {
 183                 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
 184                 .reg_offset = 2,
 185         },
 186         [PALMAS_ID_OTG_IRQ] = {
 187                 .mask = PALMAS_INT3_STATUS_ID_OTG,
 188                 .reg_offset = 2,
 189         },
 190         [PALMAS_ID_IRQ] = {
 191                 .mask = PALMAS_INT3_STATUS_ID,
 192                 .reg_offset = 2,
 193         },
 194         [PALMAS_VBUS_OTG_IRQ] = {
 195                 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
 196                 .reg_offset = 2,
 197         },
 198         [PALMAS_VBUS_IRQ] = {
 199                 .mask = PALMAS_INT3_STATUS_VBUS,
 200                 .reg_offset = 2,
 201         },
 202         /* INT4 IRQs */
 203         [PALMAS_GPIO_0_IRQ] = {
 204                 .mask = PALMAS_INT4_STATUS_GPIO_0,
 205                 .reg_offset = 3,
 206         },
 207         [PALMAS_GPIO_1_IRQ] = {
 208                 .mask = PALMAS_INT4_STATUS_GPIO_1,
 209                 .reg_offset = 3,
 210         },
 211         [PALMAS_GPIO_2_IRQ] = {
 212                 .mask = PALMAS_INT4_STATUS_GPIO_2,
 213                 .reg_offset = 3,
 214         },
 215         [PALMAS_GPIO_3_IRQ] = {
 216                 .mask = PALMAS_INT4_STATUS_GPIO_3,
 217                 .reg_offset = 3,
 218         },
 219         [PALMAS_GPIO_4_IRQ] = {
 220                 .mask = PALMAS_INT4_STATUS_GPIO_4,
 221                 .reg_offset = 3,
 222         },
 223         [PALMAS_GPIO_5_IRQ] = {
 224                 .mask = PALMAS_INT4_STATUS_GPIO_5,
 225                 .reg_offset = 3,
 226         },
 227         [PALMAS_GPIO_6_IRQ] = {
 228                 .mask = PALMAS_INT4_STATUS_GPIO_6,
 229                 .reg_offset = 3,
 230         },
 231         [PALMAS_GPIO_7_IRQ] = {
 232                 .mask = PALMAS_INT4_STATUS_GPIO_7,
 233                 .reg_offset = 3,
 234         },
 235 };
 236
 237 static struct regmap_irq_chip palmas_irq_chip = {
 238         .name = "palmas",
 239         .irqs = palmas_irqs,
 240         .num_irqs = ARRAY_SIZE(palmas_irqs),
 241
 242         .num_regs = 4,
 243         .irq_reg_stride = 5,
 244         .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 245                         PALMAS_INT1_STATUS),
 246         .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 247                         PALMAS_INT1_MASK),
 248 };
 249
 250 static void palmas_dt_to_pdata(struct device_node *node,
 251                 struct palmas_platform_data *pdata)
 252 {
 253         int ret;
 254         u32 prop;
 255
 256         ret = of_property_read_u32(node, "ti,mux_pad1", &prop);
 257         if (!ret) {
 258                 pdata->mux_from_pdata = 1;
 259                 pdata->pad1 = prop;
 260         }
 261
 262         ret = of_property_read_u32(node, "ti,mux_pad2", &prop);
 263         if (!ret) {
 264                 pdata->mux_from_pdata = 1;
 265                 pdata->pad2 = prop;
 266         }
 267
 268         /* The default for this register is all masked */
 269         ret = of_property_read_u32(node, "ti,power_ctrl", &prop);
 270         if (!ret)
 271                 pdata->power_ctrl = prop;
 272         else
 273                 pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
 274                                         PALMAS_POWER_CTRL_ENABLE1_MASK |
 275                                         PALMAS_POWER_CTRL_ENABLE2_MASK;
 276 }
 277
 278 static int palmas_i2c_probe(struct i2c_client *i2c,
 279                             const struct i2c_device_id *id)
 280 {
 281         struct palmas *palmas;
 282         struct palmas_platform_data *pdata;
 283         struct device_node *node = i2c->dev.of_node;
 284         int ret = 0, i;
 285         unsigned int reg, addr;
 286         int slave;
 287         struct mfd_cell *children;
 288
 289         pdata = dev_get_platdata(&i2c->dev);
 290
 291         if (node && !pdata) {
 292                 pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
 293
 294                 if (!pdata)
 295                         return -ENOMEM;
 296
 297                 palmas_dt_to_pdata(node, pdata);
 298         }
 299
 300         if (!pdata)
 301                 return -EINVAL;
 302
 303         palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
 304         if (palmas == NULL)
 305                 return -ENOMEM;
 306
 307         i2c_set_clientdata(i2c, palmas);
 308         palmas->dev = &i2c->dev;
 309         palmas->id = id->driver_data;
 310         palmas->irq = i2c->irq;
 311
 312         for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
 313                 if (i == 0)
 314                         palmas->i2c_clients[i] = i2c;
 315                 else {
 316                         palmas->i2c_clients[i] =
 317                                         i2c_new_dummy(i2c->adapter,
 318                                                         i2c->addr + i);
 319                         if (!palmas->i2c_clients[i]) {
 320                                 dev_err(palmas->dev,
 321                                         "can't attach client %d\n", i);
 322                                 ret = -ENOMEM;
 323                                 goto err;
 324                         }
 325                 }
 326                 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
 327                                 &palmas_regmap_config[i]);
 328                 if (IS_ERR(palmas->regmap[i])) {
 329                         ret = PTR_ERR(palmas->regmap[i]);
 330                         dev_err(palmas->dev,
 331                                 "Failed to allocate regmap %d, err: %d\n",
 332                                 i, ret);
 333                         goto err;
 334                 }
 335         }
 336
 337         /* Change IRQ into clear on read mode for efficiency */
 338         slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
 339         addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
 340         reg = PALMAS_INT_CTRL_INT_CLEAR;
 341
 342         regmap_write(palmas->regmap[slave], addr, reg);
 343
 344         ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
 345                         IRQF_ONESHOT | IRQF_TRIGGER_LOW, 0, &palmas_irq_chip,
 346                         &palmas->irq_data);
 347         if (ret < 0)
 348                 goto err;
 349
 350         slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
 351         addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 352                         PALMAS_PRIMARY_SECONDARY_PAD1);
 353
 354         if (pdata->mux_from_pdata) {
 355                 reg = pdata->pad1;
 356                 ret = regmap_write(palmas->regmap[slave], addr, reg);
 357                 if (ret)
 358                         goto err_irq;
 359         } else {
 360                 ret = regmap_read(palmas->regmap[slave], addr, &reg);
 361                 if (ret)
 362                         goto err_irq;
 363         }
 364
 365         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
 366                 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
 367         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
 368                 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
 369         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 370                         (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 371                 palmas->led_muxed |= PALMAS_LED1_MUXED;
 372         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 373                         (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 374                 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
 375         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
 376                 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
 377         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 378                         (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 379                 palmas->led_muxed |= PALMAS_LED2_MUXED;
 380         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 381                         (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 382                 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
 383         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
 384                 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
 385
 386         addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 387                         PALMAS_PRIMARY_SECONDARY_PAD2);
 388
 389         if (pdata->mux_from_pdata) {
 390                 reg = pdata->pad2;
 391                 ret = regmap_write(palmas->regmap[slave], addr, reg);
 392                 if (ret)
 393                         goto err_irq;
 394         } else {
 395                 ret = regmap_read(palmas->regmap[slave], addr, &reg);
 396                 if (ret)
 397                         goto err_irq;
 398         }
 399
 400         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
 401                 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
 402         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
 403                 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
 404         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
 405                 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
 406         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
 407                 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
 408
 409         dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
 410                         palmas->gpio_muxed, palmas->pwm_muxed,
 411                         palmas->led_muxed);
 412
 413         reg = pdata->power_ctrl;
 414
 415         slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
 416         addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
 417
 418         ret = regmap_write(palmas->regmap[slave], addr, reg);
 419         if (ret)
 420                 goto err_irq;
 421
 422         /*
 423          * If we are probing with DT do this the DT way and return here
 424          * otherwise continue and add devices using mfd helpers.
 425          */
 426         if (node) {
 427                 ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
 428                 if (ret < 0)
 429                         goto err_irq;
 430                 else
 431                         return ret;
 432         }
 433
 434         children = kmemdup(palmas_children, sizeof(palmas_children),
 435                            GFP_KERNEL);
 436         if (!children) {
 437                 ret = -ENOMEM;
 438                 goto err_irq;
 439         }
 440
 441         children[PALMAS_PMIC_ID].platform_data = pdata->pmic_pdata;
 442         children[PALMAS_PMIC_ID].pdata_size = sizeof(*pdata->pmic_pdata);
 443
 444         children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
 445         children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
 446
 447         children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
 448         children[PALMAS_RESOURCE_ID].pdata_size =
 449                         sizeof(*pdata->resource_pdata);
 450
 451         children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
 452         children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
 453
 454         children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
 455         children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
 456
 457         ret = mfd_add_devices(palmas->dev, -1,
 458                               children, ARRAY_SIZE(palmas_children),
 459                               NULL, regmap_irq_chip_get_base(palmas->irq_data),
 460                               NULL);
 461         kfree(children);
 462
 463         if (ret < 0)
 464                 goto err_devices;
 465
 466         return ret;
 467
 468 err_devices:
 469         mfd_remove_devices(palmas->dev);
 470 err_irq:
 471         regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 472 err:
 473         return ret;
 474 }
 475
 476 static int palmas_i2c_remove(struct i2c_client *i2c)
 477 {
 478         struct palmas *palmas = i2c_get_clientdata(i2c);
 479
 480         mfd_remove_devices(palmas->dev);
 481         regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 482
 483         return 0;
 484 }
 485
 486 static const struct i2c_device_id palmas_i2c_id[] = {
 487         { "palmas", },
 488         { "twl6035", },
 489         { "twl6037", },
 490         { "tps65913", },
 491         { /* end */ }
 492 };
 493 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 494
 495 static struct of_device_id of_palmas_match_tbl[] = {
 496         { .compatible = "ti,palmas", },
 497         { /* end */ }
 498 };
 499
 500 static struct i2c_driver palmas_i2c_driver = {
 501         .driver = {
 502                    .name = "palmas",
 503                    .of_match_table = of_palmas_match_tbl,
 504                    .owner = THIS_MODULE,
 505         },
 506         .probe = palmas_i2c_probe,
 507         .remove = palmas_i2c_remove,
 508         .id_table = palmas_i2c_id,
 509 };
 510
 511 static int __init palmas_i2c_init(void)
 512 {
 513         return i2c_add_driver(&palmas_i2c_driver);
 514 }
 515 /* init early so consumer devices can complete system boot */
 516 subsys_initcall(palmas_i2c_init);
 517
 518 static void __exit palmas_i2c_exit(void)
 519 {
 520         i2c_del_driver(&palmas_i2c_driver);
 521 }
 522 module_exit(palmas_i2c_exit);
 523
 524 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 525 MODULE_DESCRIPTION("Palmas chip family multi-function driver");
 526 MODULE_LICENSE("GPL");