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