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#include <linux/of_platform.h>
  27
  28enum 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
  42static 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
  89static 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
 110static 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
 237static 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
 250static void __devinit 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
 278static int __devinit 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
 468err_devices:
 469        mfd_remove_devices(palmas->dev);
 470err_irq:
 471        regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 472err:
 473        return ret;
 474}
 475
 476static 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
 486static const struct i2c_device_id palmas_i2c_id[] = {
 487        { "palmas", },
 488        { "twl6035", },
 489        { "twl6037", },
 490        { "tps65913", },
 491        { /* end */ }
 492};
 493MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 494
 495static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
 496        { .compatible = "ti,palmas", },
 497        { /* end */ }
 498};
 499
 500static 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
 511static 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 */
 516subsys_initcall(palmas_i2c_init);
 517
 518static void __exit palmas_i2c_exit(void)
 519{
 520        i2c_del_driver(&palmas_i2c_driver);
 521}
 522module_exit(palmas_i2c_exit);
 523
 524MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 525MODULE_DESCRIPTION("Palmas chip family multi-function driver");
 526MODULE_LICENSE("GPL");
 527
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