Pileus Git - ~andy/linux/blob - 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 struct resource palmas_rtc_resources[] = {
  43         {
  44                 .start  = PALMAS_RTC_ALARM_IRQ,
  45                 .end    = PALMAS_RTC_ALARM_IRQ,
  46                 .flags  = IORESOURCE_IRQ,
  47         },
  48 };
  49
  50 static const struct mfd_cell palmas_children[] = {
  51         {
  52                 .name = "palmas-pmic",
  53                 .id = PALMAS_PMIC_ID,
  54         },
  55         {
  56                 .name = "palmas-gpio",
  57                 .id = PALMAS_GPIO_ID,
  58         },
  59         {
  60                 .name = "palmas-leds",
  61                 .id = PALMAS_LEDS_ID,
  62         },
  63         {
  64                 .name = "palmas-wdt",
  65                 .id = PALMAS_WDT_ID,
  66         },
  67         {
  68                 .name = "palmas-rtc",
  69                 .id = PALMAS_RTC_ID,
  70                 .resources = &palmas_rtc_resources[0],
  71                 .num_resources = ARRAY_SIZE(palmas_rtc_resources),
  72         },
  73         {
  74                 .name = "palmas-pwrbutton",
  75                 .id = PALMAS_PWRBUTTON_ID,
  76         },
  77         {
  78                 .name = "palmas-gpadc",
  79                 .id = PALMAS_GPADC_ID,
  80         },
  81         {
  82                 .name = "palmas-resource",
  83                 .id = PALMAS_RESOURCE_ID,
  84         },
  85         {
  86                 .name = "palmas-clk",
  87                 .id = PALMAS_CLK_ID,
  88         },
  89         {
  90                 .name = "palmas-pwm",
  91                 .id = PALMAS_PWM_ID,
  92         },
  93         {
  94                 .name = "palmas-usb",
  95                 .id = PALMAS_USB_ID,
  96         }
  97 };
  98
  99 static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
 100         {
 101                 .reg_bits = 8,
 102                 .val_bits = 8,
 103                 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 104                                         PALMAS_PRIMARY_SECONDARY_PAD3),
 105         },
 106         {
 107                 .reg_bits = 8,
 108                 .val_bits = 8,
 109                 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
 110                                         PALMAS_GPADC_SMPS_VSEL_MONITORING),
 111         },
 112         {
 113                 .reg_bits = 8,
 114                 .val_bits = 8,
 115                 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
 116                                         PALMAS_GPADC_TRIM16),
 117         },
 118 };
 119
 120 static const struct regmap_irq palmas_irqs[] = {
 121         /* INT1 IRQs */
 122         [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
 123                 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
 124         },
 125         [PALMAS_PWRON_IRQ] = {
 126                 .mask = PALMAS_INT1_STATUS_PWRON,
 127         },
 128         [PALMAS_LONG_PRESS_KEY_IRQ] = {
 129                 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
 130         },
 131         [PALMAS_RPWRON_IRQ] = {
 132                 .mask = PALMAS_INT1_STATUS_RPWRON,
 133         },
 134         [PALMAS_PWRDOWN_IRQ] = {
 135                 .mask = PALMAS_INT1_STATUS_PWRDOWN,
 136         },
 137         [PALMAS_HOTDIE_IRQ] = {
 138                 .mask = PALMAS_INT1_STATUS_HOTDIE,
 139         },
 140         [PALMAS_VSYS_MON_IRQ] = {
 141                 .mask = PALMAS_INT1_STATUS_VSYS_MON,
 142         },
 143         [PALMAS_VBAT_MON_IRQ] = {
 144                 .mask = PALMAS_INT1_STATUS_VBAT_MON,
 145         },
 146         /* INT2 IRQs*/
 147         [PALMAS_RTC_ALARM_IRQ] = {
 148                 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
 149                 .reg_offset = 1,
 150         },
 151         [PALMAS_RTC_TIMER_IRQ] = {
 152                 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
 153                 .reg_offset = 1,
 154         },
 155         [PALMAS_WDT_IRQ] = {
 156                 .mask = PALMAS_INT2_STATUS_WDT,
 157                 .reg_offset = 1,
 158         },
 159         [PALMAS_BATREMOVAL_IRQ] = {
 160                 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
 161                 .reg_offset = 1,
 162         },
 163         [PALMAS_RESET_IN_IRQ] = {
 164                 .mask = PALMAS_INT2_STATUS_RESET_IN,
 165                 .reg_offset = 1,
 166         },
 167         [PALMAS_FBI_BB_IRQ] = {
 168                 .mask = PALMAS_INT2_STATUS_FBI_BB,
 169                 .reg_offset = 1,
 170         },
 171         [PALMAS_SHORT_IRQ] = {
 172                 .mask = PALMAS_INT2_STATUS_SHORT,
 173                 .reg_offset = 1,
 174         },
 175         [PALMAS_VAC_ACOK_IRQ] = {
 176                 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
 177                 .reg_offset = 1,
 178         },
 179         /* INT3 IRQs */
 180         [PALMAS_GPADC_AUTO_0_IRQ] = {
 181                 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
 182                 .reg_offset = 2,
 183         },
 184         [PALMAS_GPADC_AUTO_1_IRQ] = {
 185                 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
 186                 .reg_offset = 2,
 187         },
 188         [PALMAS_GPADC_EOC_SW_IRQ] = {
 189                 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
 190                 .reg_offset = 2,
 191         },
 192         [PALMAS_GPADC_EOC_RT_IRQ] = {
 193                 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
 194                 .reg_offset = 2,
 195         },
 196         [PALMAS_ID_OTG_IRQ] = {
 197                 .mask = PALMAS_INT3_STATUS_ID_OTG,
 198                 .reg_offset = 2,
 199         },
 200         [PALMAS_ID_IRQ] = {
 201                 .mask = PALMAS_INT3_STATUS_ID,
 202                 .reg_offset = 2,
 203         },
 204         [PALMAS_VBUS_OTG_IRQ] = {
 205                 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
 206                 .reg_offset = 2,
 207         },
 208         [PALMAS_VBUS_IRQ] = {
 209                 .mask = PALMAS_INT3_STATUS_VBUS,
 210                 .reg_offset = 2,
 211         },
 212         /* INT4 IRQs */
 213         [PALMAS_GPIO_0_IRQ] = {
 214                 .mask = PALMAS_INT4_STATUS_GPIO_0,
 215                 .reg_offset = 3,
 216         },
 217         [PALMAS_GPIO_1_IRQ] = {
 218                 .mask = PALMAS_INT4_STATUS_GPIO_1,
 219                 .reg_offset = 3,
 220         },
 221         [PALMAS_GPIO_2_IRQ] = {
 222                 .mask = PALMAS_INT4_STATUS_GPIO_2,
 223                 .reg_offset = 3,
 224         },
 225         [PALMAS_GPIO_3_IRQ] = {
 226                 .mask = PALMAS_INT4_STATUS_GPIO_3,
 227                 .reg_offset = 3,
 228         },
 229         [PALMAS_GPIO_4_IRQ] = {
 230                 .mask = PALMAS_INT4_STATUS_GPIO_4,
 231                 .reg_offset = 3,
 232         },
 233         [PALMAS_GPIO_5_IRQ] = {
 234                 .mask = PALMAS_INT4_STATUS_GPIO_5,
 235                 .reg_offset = 3,
 236         },
 237         [PALMAS_GPIO_6_IRQ] = {
 238                 .mask = PALMAS_INT4_STATUS_GPIO_6,
 239                 .reg_offset = 3,
 240         },
 241         [PALMAS_GPIO_7_IRQ] = {
 242                 .mask = PALMAS_INT4_STATUS_GPIO_7,
 243                 .reg_offset = 3,
 244         },
 245 };
 246
 247 static struct regmap_irq_chip palmas_irq_chip = {
 248         .name = "palmas",
 249         .irqs = palmas_irqs,
 250         .num_irqs = ARRAY_SIZE(palmas_irqs),
 251
 252         .num_regs = 4,
 253         .irq_reg_stride = 5,
 254         .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 255                         PALMAS_INT1_STATUS),
 256         .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 257                         PALMAS_INT1_MASK),
 258 };
 259
 260 static void palmas_dt_to_pdata(struct device_node *node,
 261                 struct palmas_platform_data *pdata)
 262 {
 263         int ret;
 264         u32 prop;
 265
 266         ret = of_property_read_u32(node, "ti,mux_pad1", &prop);
 267         if (!ret) {
 268                 pdata->mux_from_pdata = 1;
 269                 pdata->pad1 = prop;
 270         }
 271
 272         ret = of_property_read_u32(node, "ti,mux_pad2", &prop);
 273         if (!ret) {
 274                 pdata->mux_from_pdata = 1;
 275                 pdata->pad2 = prop;
 276         }
 277
 278         /* The default for this register is all masked */
 279         ret = of_property_read_u32(node, "ti,power_ctrl", &prop);
 280         if (!ret)
 281                 pdata->power_ctrl = prop;
 282         else
 283                 pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
 284                                         PALMAS_POWER_CTRL_ENABLE1_MASK |
 285                                         PALMAS_POWER_CTRL_ENABLE2_MASK;
 286 }
 287
 288 static int palmas_i2c_probe(struct i2c_client *i2c,
 289                             const struct i2c_device_id *id)
 290 {
 291         struct palmas *palmas;
 292         struct palmas_platform_data *pdata;
 293         struct device_node *node = i2c->dev.of_node;
 294         int ret = 0, i;
 295         unsigned int reg, addr;
 296         int slave;
 297         struct mfd_cell *children;
 298
 299         pdata = dev_get_platdata(&i2c->dev);
 300
 301         if (node && !pdata) {
 302                 pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
 303
 304                 if (!pdata)
 305                         return -ENOMEM;
 306
 307                 palmas_dt_to_pdata(node, pdata);
 308         }
 309
 310         if (!pdata)
 311                 return -EINVAL;
 312
 313         palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
 314         if (palmas == NULL)
 315                 return -ENOMEM;
 316
 317         i2c_set_clientdata(i2c, palmas);
 318         palmas->dev = &i2c->dev;
 319         palmas->id = id->driver_data;
 320         palmas->irq = i2c->irq;
 321
 322         for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
 323                 if (i == 0)
 324                         palmas->i2c_clients[i] = i2c;
 325                 else {
 326                         palmas->i2c_clients[i] =
 327                                         i2c_new_dummy(i2c->adapter,
 328                                                         i2c->addr + i);
 329                         if (!palmas->i2c_clients[i]) {
 330                                 dev_err(palmas->dev,
 331                                         "can't attach client %d\n", i);
 332                                 ret = -ENOMEM;
 333                                 goto err;
 334                         }
 335                 }
 336                 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
 337                                 &palmas_regmap_config[i]);
 338                 if (IS_ERR(palmas->regmap[i])) {
 339                         ret = PTR_ERR(palmas->regmap[i]);
 340                         dev_err(palmas->dev,
 341                                 "Failed to allocate regmap %d, err: %d\n",
 342                                 i, ret);
 343                         goto err;
 344                 }
 345         }
 346
 347         /* Change IRQ into clear on read mode for efficiency */
 348         slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
 349         addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
 350         reg = PALMAS_INT_CTRL_INT_CLEAR;
 351
 352         regmap_write(palmas->regmap[slave], addr, reg);
 353
 354         ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
 355                         IRQF_ONESHOT | IRQF_TRIGGER_LOW, 0, &palmas_irq_chip,
 356                         &palmas->irq_data);
 357         if (ret < 0)
 358                 goto err;
 359
 360         slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
 361         addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 362                         PALMAS_PRIMARY_SECONDARY_PAD1);
 363
 364         if (pdata->mux_from_pdata) {
 365                 reg = pdata->pad1;
 366                 ret = regmap_write(palmas->regmap[slave], addr, reg);
 367                 if (ret)
 368                         goto err_irq;
 369         } else {
 370                 ret = regmap_read(palmas->regmap[slave], addr, &reg);
 371                 if (ret)
 372                         goto err_irq;
 373         }
 374
 375         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
 376                 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
 377         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
 378                 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
 379         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 380                         (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 381                 palmas->led_muxed |= PALMAS_LED1_MUXED;
 382         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 383                         (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 384                 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
 385         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
 386                 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
 387         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 388                         (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 389                 palmas->led_muxed |= PALMAS_LED2_MUXED;
 390         else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 391                         (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 392                 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
 393         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
 394                 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
 395
 396         addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 397                         PALMAS_PRIMARY_SECONDARY_PAD2);
 398
 399         if (pdata->mux_from_pdata) {
 400                 reg = pdata->pad2;
 401                 ret = regmap_write(palmas->regmap[slave], addr, reg);
 402                 if (ret)
 403                         goto err_irq;
 404         } else {
 405                 ret = regmap_read(palmas->regmap[slave], addr, &reg);
 406                 if (ret)
 407                         goto err_irq;
 408         }
 409
 410         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
 411                 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
 412         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
 413                 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
 414         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
 415                 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
 416         if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
 417                 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
 418
 419         dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
 420                         palmas->gpio_muxed, palmas->pwm_muxed,
 421                         palmas->led_muxed);
 422
 423         reg = pdata->power_ctrl;
 424
 425         slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
 426         addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
 427
 428         ret = regmap_write(palmas->regmap[slave], addr, reg);
 429         if (ret)
 430                 goto err_irq;
 431
 432         /*
 433          * If we are probing with DT do this the DT way and return here
 434          * otherwise continue and add devices using mfd helpers.
 435          */
 436         if (node) {
 437                 ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
 438                 if (ret < 0)
 439                         goto err_irq;
 440                 else
 441                         return ret;
 442         }
 443
 444         children = kmemdup(palmas_children, sizeof(palmas_children),
 445                            GFP_KERNEL);
 446         if (!children) {
 447                 ret = -ENOMEM;
 448                 goto err_irq;
 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         children[PALMAS_GPADC_ID].platform_data = pdata->gpadc_pdata;
 455         children[PALMAS_GPADC_ID].pdata_size = sizeof(*pdata->gpadc_pdata);
 456
 457         children[PALMAS_RESOURCE_ID].platform_data = pdata->resource_pdata;
 458         children[PALMAS_RESOURCE_ID].pdata_size =
 459                         sizeof(*pdata->resource_pdata);
 460
 461         children[PALMAS_USB_ID].platform_data = pdata->usb_pdata;
 462         children[PALMAS_USB_ID].pdata_size = sizeof(*pdata->usb_pdata);
 463
 464         children[PALMAS_CLK_ID].platform_data = pdata->clk_pdata;
 465         children[PALMAS_CLK_ID].pdata_size = sizeof(*pdata->clk_pdata);
 466
 467         ret = mfd_add_devices(palmas->dev, -1,
 468                               children, ARRAY_SIZE(palmas_children),
 469                               NULL, 0,
 470                               regmap_irq_get_domain(palmas->irq_data));
 471         kfree(children);
 472
 473         if (ret < 0)
 474                 goto err_devices;
 475
 476         return ret;
 477
 478 err_devices:
 479         mfd_remove_devices(palmas->dev);
 480 err_irq:
 481         regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 482 err:
 483         return ret;
 484 }
 485
 486 static int palmas_i2c_remove(struct i2c_client *i2c)
 487 {
 488         struct palmas *palmas = i2c_get_clientdata(i2c);
 489
 490         mfd_remove_devices(palmas->dev);
 491         regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 492
 493         return 0;
 494 }
 495
 496 static const struct i2c_device_id palmas_i2c_id[] = {
 497         { "palmas", },
 498         { "twl6035", },
 499         { "twl6037", },
 500         { "tps65913", },
 501         { /* end */ }
 502 };
 503 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 504
 505 static struct of_device_id of_palmas_match_tbl[] = {
 506         { .compatible = "ti,palmas", },
 507         { /* end */ }
 508 };
 509
 510 static struct i2c_driver palmas_i2c_driver = {
 511         .driver = {
 512                    .name = "palmas",
 513                    .of_match_table = of_palmas_match_tbl,
 514                    .owner = THIS_MODULE,
 515         },
 516         .probe = palmas_i2c_probe,
 517         .remove = palmas_i2c_remove,
 518         .id_table = palmas_i2c_id,
 519 };
 520
 521 static int __init palmas_i2c_init(void)
 522 {
 523         return i2c_add_driver(&palmas_i2c_driver);
 524 }
 525 /* init early so consumer devices can complete system boot */
 526 subsys_initcall(palmas_i2c_init);
 527
 528 static void __exit palmas_i2c_exit(void)
 529 {
 530         i2c_del_driver(&palmas_i2c_driver);
 531 }
 532 module_exit(palmas_i2c_exit);
 533
 534 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 535 MODULE_DESCRIPTION("Palmas chip family multi-function driver");
 536 MODULE_LICENSE("GPL");