linux/drivers/mfd/palmas.c
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   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
  27static 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
  36static 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
  63static 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
  72static 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
  81enum 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
  95static 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
 150static 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
 171static 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
 298static 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
 311static 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                              NULL);
 458        kfree(children);
 459
 460        if (ret < 0)
 461                goto err;
 462
 463        return ret;
 464
 465err:
 466        mfd_remove_devices(palmas->dev);
 467        kfree(palmas);
 468        return ret;
 469}
 470
 471static int palmas_i2c_remove(struct i2c_client *i2c)
 472{
 473        struct palmas *palmas = i2c_get_clientdata(i2c);
 474
 475        mfd_remove_devices(palmas->dev);
 476        regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 477
 478        return 0;
 479}
 480
 481static const struct i2c_device_id palmas_i2c_id[] = {
 482        { "palmas", },
 483        { "twl6035", },
 484        { "twl6037", },
 485        { "tps65913", },
 486        { /* end */ }
 487};
 488MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 489
 490static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
 491        { .compatible = "ti,palmas", },
 492        { /* end */ }
 493};
 494
 495static struct i2c_driver palmas_i2c_driver = {
 496        .driver = {
 497                   .name = "palmas",
 498                   .of_match_table = of_palmas_match_tbl,
 499                   .owner = THIS_MODULE,
 500        },
 501        .probe = palmas_i2c_probe,
 502        .remove = palmas_i2c_remove,
 503        .id_table = palmas_i2c_id,
 504};
 505
 506static int __init palmas_i2c_init(void)
 507{
 508        return i2c_add_driver(&palmas_i2c_driver);
 509}
 510/* init early so consumer devices can complete system boot */
 511subsys_initcall(palmas_i2c_init);
 512
 513static void __exit palmas_i2c_exit(void)
 514{
 515        i2c_del_driver(&palmas_i2c_driver);
 516}
 517module_exit(palmas_i2c_exit);
 518
 519MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 520MODULE_DESCRIPTION("Palmas chip family multi-function driver");
 521MODULE_LICENSE("GPL");
 522
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