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_device.h>
  27
  28static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
  29        {
  30                .reg_bits = 8,
  31                .val_bits = 8,
  32                .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
  33                                        PALMAS_PRIMARY_SECONDARY_PAD3),
  34        },
  35        {
  36                .reg_bits = 8,
  37                .val_bits = 8,
  38                .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
  39                                        PALMAS_GPADC_SMPS_VSEL_MONITORING),
  40        },
  41        {
  42                .reg_bits = 8,
  43                .val_bits = 8,
  44                .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
  45                                        PALMAS_GPADC_TRIM16),
  46        },
  47};
  48
  49static const struct regmap_irq palmas_irqs[] = {
  50        /* INT1 IRQs */
  51        [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
  52                .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
  53        },
  54        [PALMAS_PWRON_IRQ] = {
  55                .mask = PALMAS_INT1_STATUS_PWRON,
  56        },
  57        [PALMAS_LONG_PRESS_KEY_IRQ] = {
  58                .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
  59        },
  60        [PALMAS_RPWRON_IRQ] = {
  61                .mask = PALMAS_INT1_STATUS_RPWRON,
  62        },
  63        [PALMAS_PWRDOWN_IRQ] = {
  64                .mask = PALMAS_INT1_STATUS_PWRDOWN,
  65        },
  66        [PALMAS_HOTDIE_IRQ] = {
  67                .mask = PALMAS_INT1_STATUS_HOTDIE,
  68        },
  69        [PALMAS_VSYS_MON_IRQ] = {
  70                .mask = PALMAS_INT1_STATUS_VSYS_MON,
  71        },
  72        [PALMAS_VBAT_MON_IRQ] = {
  73                .mask = PALMAS_INT1_STATUS_VBAT_MON,
  74        },
  75        /* INT2 IRQs*/
  76        [PALMAS_RTC_ALARM_IRQ] = {
  77                .mask = PALMAS_INT2_STATUS_RTC_ALARM,
  78                .reg_offset = 1,
  79        },
  80        [PALMAS_RTC_TIMER_IRQ] = {
  81                .mask = PALMAS_INT2_STATUS_RTC_TIMER,
  82                .reg_offset = 1,
  83        },
  84        [PALMAS_WDT_IRQ] = {
  85                .mask = PALMAS_INT2_STATUS_WDT,
  86                .reg_offset = 1,
  87        },
  88        [PALMAS_BATREMOVAL_IRQ] = {
  89                .mask = PALMAS_INT2_STATUS_BATREMOVAL,
  90                .reg_offset = 1,
  91        },
  92        [PALMAS_RESET_IN_IRQ] = {
  93                .mask = PALMAS_INT2_STATUS_RESET_IN,
  94                .reg_offset = 1,
  95        },
  96        [PALMAS_FBI_BB_IRQ] = {
  97                .mask = PALMAS_INT2_STATUS_FBI_BB,
  98                .reg_offset = 1,
  99        },
 100        [PALMAS_SHORT_IRQ] = {
 101                .mask = PALMAS_INT2_STATUS_SHORT,
 102                .reg_offset = 1,
 103        },
 104        [PALMAS_VAC_ACOK_IRQ] = {
 105                .mask = PALMAS_INT2_STATUS_VAC_ACOK,
 106                .reg_offset = 1,
 107        },
 108        /* INT3 IRQs */
 109        [PALMAS_GPADC_AUTO_0_IRQ] = {
 110                .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
 111                .reg_offset = 2,
 112        },
 113        [PALMAS_GPADC_AUTO_1_IRQ] = {
 114                .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
 115                .reg_offset = 2,
 116        },
 117        [PALMAS_GPADC_EOC_SW_IRQ] = {
 118                .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
 119                .reg_offset = 2,
 120        },
 121        [PALMAS_GPADC_EOC_RT_IRQ] = {
 122                .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
 123                .reg_offset = 2,
 124        },
 125        [PALMAS_ID_OTG_IRQ] = {
 126                .mask = PALMAS_INT3_STATUS_ID_OTG,
 127                .reg_offset = 2,
 128        },
 129        [PALMAS_ID_IRQ] = {
 130                .mask = PALMAS_INT3_STATUS_ID,
 131                .reg_offset = 2,
 132        },
 133        [PALMAS_VBUS_OTG_IRQ] = {
 134                .mask = PALMAS_INT3_STATUS_VBUS_OTG,
 135                .reg_offset = 2,
 136        },
 137        [PALMAS_VBUS_IRQ] = {
 138                .mask = PALMAS_INT3_STATUS_VBUS,
 139                .reg_offset = 2,
 140        },
 141        /* INT4 IRQs */
 142        [PALMAS_GPIO_0_IRQ] = {
 143                .mask = PALMAS_INT4_STATUS_GPIO_0,
 144                .reg_offset = 3,
 145        },
 146        [PALMAS_GPIO_1_IRQ] = {
 147                .mask = PALMAS_INT4_STATUS_GPIO_1,
 148                .reg_offset = 3,
 149        },
 150        [PALMAS_GPIO_2_IRQ] = {
 151                .mask = PALMAS_INT4_STATUS_GPIO_2,
 152                .reg_offset = 3,
 153        },
 154        [PALMAS_GPIO_3_IRQ] = {
 155                .mask = PALMAS_INT4_STATUS_GPIO_3,
 156                .reg_offset = 3,
 157        },
 158        [PALMAS_GPIO_4_IRQ] = {
 159                .mask = PALMAS_INT4_STATUS_GPIO_4,
 160                .reg_offset = 3,
 161        },
 162        [PALMAS_GPIO_5_IRQ] = {
 163                .mask = PALMAS_INT4_STATUS_GPIO_5,
 164                .reg_offset = 3,
 165        },
 166        [PALMAS_GPIO_6_IRQ] = {
 167                .mask = PALMAS_INT4_STATUS_GPIO_6,
 168                .reg_offset = 3,
 169        },
 170        [PALMAS_GPIO_7_IRQ] = {
 171                .mask = PALMAS_INT4_STATUS_GPIO_7,
 172                .reg_offset = 3,
 173        },
 174};
 175
 176static struct regmap_irq_chip palmas_irq_chip = {
 177        .name = "palmas",
 178        .irqs = palmas_irqs,
 179        .num_irqs = ARRAY_SIZE(palmas_irqs),
 180
 181        .num_regs = 4,
 182        .irq_reg_stride = 5,
 183        .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 184                        PALMAS_INT1_STATUS),
 185        .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
 186                        PALMAS_INT1_MASK),
 187};
 188
 189static int palmas_set_pdata_irq_flag(struct i2c_client *i2c,
 190                struct palmas_platform_data *pdata)
 191{
 192        struct irq_data *irq_data = irq_get_irq_data(i2c->irq);
 193        if (!irq_data) {
 194                dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
 195                return -EINVAL;
 196        }
 197
 198        pdata->irq_flags = irqd_get_trigger_type(irq_data);
 199        dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags);
 200        return 0;
 201}
 202
 203static void palmas_dt_to_pdata(struct i2c_client *i2c,
 204                struct palmas_platform_data *pdata)
 205{
 206        struct device_node *node = i2c->dev.of_node;
 207        int ret;
 208        u32 prop;
 209
 210        ret = of_property_read_u32(node, "ti,mux-pad1", &prop);
 211        if (!ret) {
 212                pdata->mux_from_pdata = 1;
 213                pdata->pad1 = prop;
 214        }
 215
 216        ret = of_property_read_u32(node, "ti,mux-pad2", &prop);
 217        if (!ret) {
 218                pdata->mux_from_pdata = 1;
 219                pdata->pad2 = prop;
 220        }
 221
 222        /* The default for this register is all masked */
 223        ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
 224        if (!ret)
 225                pdata->power_ctrl = prop;
 226        else
 227                pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
 228                                        PALMAS_POWER_CTRL_ENABLE1_MASK |
 229                                        PALMAS_POWER_CTRL_ENABLE2_MASK;
 230        if (i2c->irq)
 231                palmas_set_pdata_irq_flag(i2c, pdata);
 232}
 233
 234static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST;
 235static unsigned int tps659038_features;
 236
 237static const struct of_device_id of_palmas_match_tbl[] = {
 238        {
 239                .compatible = "ti,palmas",
 240                .data = &palmas_features,
 241        },
 242        {
 243                .compatible = "ti,tps659038",
 244                .data = &tps659038_features,
 245        },
 246        { },
 247};
 248
 249static int palmas_i2c_probe(struct i2c_client *i2c,
 250                            const struct i2c_device_id *id)
 251{
 252        struct palmas *palmas;
 253        struct palmas_platform_data *pdata;
 254        struct device_node *node = i2c->dev.of_node;
 255        int ret = 0, i;
 256        unsigned int reg, addr, *features;
 257        int slave;
 258        const struct of_device_id *match;
 259
 260        pdata = dev_get_platdata(&i2c->dev);
 261
 262        if (node && !pdata) {
 263                pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
 264
 265                if (!pdata)
 266                        return -ENOMEM;
 267
 268                palmas_dt_to_pdata(i2c, pdata);
 269        }
 270
 271        if (!pdata)
 272                return -EINVAL;
 273
 274        palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
 275        if (palmas == NULL)
 276                return -ENOMEM;
 277
 278        i2c_set_clientdata(i2c, palmas);
 279        palmas->dev = &i2c->dev;
 280        palmas->irq = i2c->irq;
 281
 282        match = of_match_device(of_match_ptr(of_palmas_match_tbl), &i2c->dev);
 283
 284        if (!match)
 285                return -ENODATA;
 286
 287        features = (unsigned int *)match->data;
 288        palmas->features = *features;
 289
 290        for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
 291                if (i == 0)
 292                        palmas->i2c_clients[i] = i2c;
 293                else {
 294                        palmas->i2c_clients[i] =
 295                                        i2c_new_dummy(i2c->adapter,
 296                                                        i2c->addr + i);
 297                        if (!palmas->i2c_clients[i]) {
 298                                dev_err(palmas->dev,
 299                                        "can't attach client %d\n", i);
 300                                ret = -ENOMEM;
 301                                goto err;
 302                        }
 303                        palmas->i2c_clients[i]->dev.of_node = of_node_get(node);
 304                }
 305                palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
 306                                &palmas_regmap_config[i]);
 307                if (IS_ERR(palmas->regmap[i])) {
 308                        ret = PTR_ERR(palmas->regmap[i]);
 309                        dev_err(palmas->dev,
 310                                "Failed to allocate regmap %d, err: %d\n",
 311                                i, ret);
 312                        goto err;
 313                }
 314        }
 315
 316        if (!palmas->irq) {
 317                dev_warn(palmas->dev, "IRQ missing: skipping irq request\n");
 318                goto no_irq;
 319        }
 320
 321        /* Change interrupt line output polarity */
 322        if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
 323                reg = PALMAS_POLARITY_CTRL_INT_POLARITY;
 324        else
 325                reg = 0;
 326        ret = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE,
 327                        PALMAS_POLARITY_CTRL, PALMAS_POLARITY_CTRL_INT_POLARITY,
 328                        reg);
 329        if (ret < 0) {
 330                dev_err(palmas->dev, "POLARITY_CTRL updat failed: %d\n", ret);
 331                goto err;
 332        }
 333
 334        /* Change IRQ into clear on read mode for efficiency */
 335        slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
 336        addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
 337        reg = PALMAS_INT_CTRL_INT_CLEAR;
 338
 339        regmap_write(palmas->regmap[slave], addr, reg);
 340
 341        ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
 342                        IRQF_ONESHOT | pdata->irq_flags, 0, &palmas_irq_chip,
 343                        &palmas->irq_data);
 344        if (ret < 0)
 345                goto err;
 346
 347no_irq:
 348        slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
 349        addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 350                        PALMAS_PRIMARY_SECONDARY_PAD1);
 351
 352        if (pdata->mux_from_pdata) {
 353                reg = pdata->pad1;
 354                ret = regmap_write(palmas->regmap[slave], addr, reg);
 355                if (ret)
 356                        goto err_irq;
 357        } else {
 358                ret = regmap_read(palmas->regmap[slave], addr, &reg);
 359                if (ret)
 360                        goto err_irq;
 361        }
 362
 363        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
 364                palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
 365        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
 366                palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
 367        else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 368                        (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 369                palmas->led_muxed |= PALMAS_LED1_MUXED;
 370        else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
 371                        (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
 372                palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
 373        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
 374                palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
 375        else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 376                        (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 377                palmas->led_muxed |= PALMAS_LED2_MUXED;
 378        else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
 379                        (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
 380                palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
 381        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
 382                palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
 383
 384        addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
 385                        PALMAS_PRIMARY_SECONDARY_PAD2);
 386
 387        if (pdata->mux_from_pdata) {
 388                reg = pdata->pad2;
 389                ret = regmap_write(palmas->regmap[slave], addr, reg);
 390                if (ret)
 391                        goto err_irq;
 392        } else {
 393                ret = regmap_read(palmas->regmap[slave], addr, &reg);
 394                if (ret)
 395                        goto err_irq;
 396        }
 397
 398        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
 399                palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
 400        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
 401                palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
 402        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
 403                palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
 404        if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
 405                palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
 406
 407        dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
 408                        palmas->gpio_muxed, palmas->pwm_muxed,
 409                        palmas->led_muxed);
 410
 411        reg = pdata->power_ctrl;
 412
 413        slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
 414        addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
 415
 416        ret = regmap_write(palmas->regmap[slave], addr, reg);
 417        if (ret)
 418                goto err_irq;
 419
 420        /*
 421         * If we are probing with DT do this the DT way and return here
 422         * otherwise continue and add devices using mfd helpers.
 423         */
 424        if (node) {
 425                ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
 426                if (ret < 0)
 427                        goto err_irq;
 428                else
 429                        return ret;
 430        }
 431
 432        return ret;
 433
 434err_irq:
 435        regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 436err:
 437        return ret;
 438}
 439
 440static int palmas_i2c_remove(struct i2c_client *i2c)
 441{
 442        struct palmas *palmas = i2c_get_clientdata(i2c);
 443
 444        mfd_remove_devices(palmas->dev);
 445        regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 446
 447        return 0;
 448}
 449
 450static const struct i2c_device_id palmas_i2c_id[] = {
 451        { "palmas", },
 452        { "twl6035", },
 453        { "twl6037", },
 454        { "tps65913", },
 455        { /* end */ }
 456};
 457MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
 458
 459static struct i2c_driver palmas_i2c_driver = {
 460        .driver = {
 461                   .name = "palmas",
 462                   .of_match_table = of_palmas_match_tbl,
 463                   .owner = THIS_MODULE,
 464        },
 465        .probe = palmas_i2c_probe,
 466        .remove = palmas_i2c_remove,
 467        .id_table = palmas_i2c_id,
 468};
 469
 470static int __init palmas_i2c_init(void)
 471{
 472        return i2c_add_driver(&palmas_i2c_driver);
 473}
 474/* init early so consumer devices can complete system boot */
 475subsys_initcall(palmas_i2c_init);
 476
 477static void __exit palmas_i2c_exit(void)
 478{
 479        i2c_del_driver(&palmas_i2c_driver);
 480}
 481module_exit(palmas_i2c_exit);
 482
 483MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 484MODULE_DESCRIPTION("Palmas chip family multi-function driver");
 485MODULE_LICENSE("GPL");
 486
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