linux/drivers/mfd/menelaus.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (C) 2004 Texas Instruments, Inc.
   4 *
   5 * Some parts based tps65010.c:
   6 * Copyright (C) 2004 Texas Instruments and
   7 * Copyright (C) 2004-2005 David Brownell
   8 *
   9 * Some parts based on tlv320aic24.c:
  10 * Copyright (C) by Kai Svahn <kai.svahn@nokia.com>
  11 *
  12 * Changes for interrupt handling and clean-up by
  13 * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com>
  14 * Cleanup and generalized support for voltage setting by
  15 * Juha Yrjola
  16 * Added support for controlling VCORE and regulator sleep states,
  17 * Amit Kucheria <amit.kucheria@nokia.com>
  18 * Copyright (C) 2005, 2006 Nokia Corporation
  19 */
  20
  21#include <linux/module.h>
  22#include <linux/i2c.h>
  23#include <linux/interrupt.h>
  24#include <linux/sched.h>
  25#include <linux/mutex.h>
  26#include <linux/workqueue.h>
  27#include <linux/delay.h>
  28#include <linux/rtc.h>
  29#include <linux/bcd.h>
  30#include <linux/slab.h>
  31#include <linux/mfd/menelaus.h>
  32#include <linux/gpio.h>
  33
  34#include <asm/mach/irq.h>
  35
  36
  37#define DRIVER_NAME                     "menelaus"
  38
  39#define MENELAUS_I2C_ADDRESS            0x72
  40
  41#define MENELAUS_REV                    0x01
  42#define MENELAUS_VCORE_CTRL1            0x02
  43#define MENELAUS_VCORE_CTRL2            0x03
  44#define MENELAUS_VCORE_CTRL3            0x04
  45#define MENELAUS_VCORE_CTRL4            0x05
  46#define MENELAUS_VCORE_CTRL5            0x06
  47#define MENELAUS_DCDC_CTRL1             0x07
  48#define MENELAUS_DCDC_CTRL2             0x08
  49#define MENELAUS_DCDC_CTRL3             0x09
  50#define MENELAUS_LDO_CTRL1              0x0A
  51#define MENELAUS_LDO_CTRL2              0x0B
  52#define MENELAUS_LDO_CTRL3              0x0C
  53#define MENELAUS_LDO_CTRL4              0x0D
  54#define MENELAUS_LDO_CTRL5              0x0E
  55#define MENELAUS_LDO_CTRL6              0x0F
  56#define MENELAUS_LDO_CTRL7              0x10
  57#define MENELAUS_LDO_CTRL8              0x11
  58#define MENELAUS_SLEEP_CTRL1            0x12
  59#define MENELAUS_SLEEP_CTRL2            0x13
  60#define MENELAUS_DEVICE_OFF             0x14
  61#define MENELAUS_OSC_CTRL               0x15
  62#define MENELAUS_DETECT_CTRL            0x16
  63#define MENELAUS_INT_MASK1              0x17
  64#define MENELAUS_INT_MASK2              0x18
  65#define MENELAUS_INT_STATUS1            0x19
  66#define MENELAUS_INT_STATUS2            0x1A
  67#define MENELAUS_INT_ACK1               0x1B
  68#define MENELAUS_INT_ACK2               0x1C
  69#define MENELAUS_GPIO_CTRL              0x1D
  70#define MENELAUS_GPIO_IN                0x1E
  71#define MENELAUS_GPIO_OUT               0x1F
  72#define MENELAUS_BBSMS                  0x20
  73#define MENELAUS_RTC_CTRL               0x21
  74#define MENELAUS_RTC_UPDATE             0x22
  75#define MENELAUS_RTC_SEC                0x23
  76#define MENELAUS_RTC_MIN                0x24
  77#define MENELAUS_RTC_HR                 0x25
  78#define MENELAUS_RTC_DAY                0x26
  79#define MENELAUS_RTC_MON                0x27
  80#define MENELAUS_RTC_YR                 0x28
  81#define MENELAUS_RTC_WKDAY              0x29
  82#define MENELAUS_RTC_AL_SEC             0x2A
  83#define MENELAUS_RTC_AL_MIN             0x2B
  84#define MENELAUS_RTC_AL_HR              0x2C
  85#define MENELAUS_RTC_AL_DAY             0x2D
  86#define MENELAUS_RTC_AL_MON             0x2E
  87#define MENELAUS_RTC_AL_YR              0x2F
  88#define MENELAUS_RTC_COMP_MSB           0x30
  89#define MENELAUS_RTC_COMP_LSB           0x31
  90#define MENELAUS_S1_PULL_EN             0x32
  91#define MENELAUS_S1_PULL_DIR            0x33
  92#define MENELAUS_S2_PULL_EN             0x34
  93#define MENELAUS_S2_PULL_DIR            0x35
  94#define MENELAUS_MCT_CTRL1              0x36
  95#define MENELAUS_MCT_CTRL2              0x37
  96#define MENELAUS_MCT_CTRL3              0x38
  97#define MENELAUS_MCT_PIN_ST             0x39
  98#define MENELAUS_DEBOUNCE1              0x3A
  99
 100#define IH_MENELAUS_IRQS                12
 101#define MENELAUS_MMC_S1CD_IRQ           0       /* MMC slot 1 card change */
 102#define MENELAUS_MMC_S2CD_IRQ           1       /* MMC slot 2 card change */
 103#define MENELAUS_MMC_S1D1_IRQ           2       /* MMC DAT1 low in slot 1 */
 104#define MENELAUS_MMC_S2D1_IRQ           3       /* MMC DAT1 low in slot 2 */
 105#define MENELAUS_LOWBAT_IRQ             4       /* Low battery */
 106#define MENELAUS_HOTDIE_IRQ             5       /* Hot die detect */
 107#define MENELAUS_UVLO_IRQ               6       /* UVLO detect */
 108#define MENELAUS_TSHUT_IRQ              7       /* Thermal shutdown */
 109#define MENELAUS_RTCTMR_IRQ             8       /* RTC timer */
 110#define MENELAUS_RTCALM_IRQ             9       /* RTC alarm */
 111#define MENELAUS_RTCERR_IRQ             10      /* RTC error */
 112#define MENELAUS_PSHBTN_IRQ             11      /* Push button */
 113#define MENELAUS_RESERVED12_IRQ         12      /* Reserved */
 114#define MENELAUS_RESERVED13_IRQ         13      /* Reserved */
 115#define MENELAUS_RESERVED14_IRQ         14      /* Reserved */
 116#define MENELAUS_RESERVED15_IRQ         15      /* Reserved */
 117
 118/* VCORE_CTRL1 register */
 119#define VCORE_CTRL1_BYP_COMP            (1 << 5)
 120#define VCORE_CTRL1_HW_NSW              (1 << 7)
 121
 122/* GPIO_CTRL register */
 123#define GPIO_CTRL_SLOTSELEN             (1 << 5)
 124#define GPIO_CTRL_SLPCTLEN              (1 << 6)
 125#define GPIO1_DIR_INPUT                 (1 << 0)
 126#define GPIO2_DIR_INPUT                 (1 << 1)
 127#define GPIO3_DIR_INPUT                 (1 << 2)
 128
 129/* MCT_CTRL1 register */
 130#define MCT_CTRL1_S1_CMD_OD             (1 << 2)
 131#define MCT_CTRL1_S2_CMD_OD             (1 << 3)
 132
 133/* MCT_CTRL2 register */
 134#define MCT_CTRL2_VS2_SEL_D0            (1 << 0)
 135#define MCT_CTRL2_VS2_SEL_D1            (1 << 1)
 136#define MCT_CTRL2_S1CD_BUFEN            (1 << 4)
 137#define MCT_CTRL2_S2CD_BUFEN            (1 << 5)
 138#define MCT_CTRL2_S1CD_DBEN             (1 << 6)
 139#define MCT_CTRL2_S2CD_BEN              (1 << 7)
 140
 141/* MCT_CTRL3 register */
 142#define MCT_CTRL3_SLOT1_EN              (1 << 0)
 143#define MCT_CTRL3_SLOT2_EN              (1 << 1)
 144#define MCT_CTRL3_S1_AUTO_EN            (1 << 2)
 145#define MCT_CTRL3_S2_AUTO_EN            (1 << 3)
 146
 147/* MCT_PIN_ST register */
 148#define MCT_PIN_ST_S1_CD_ST             (1 << 0)
 149#define MCT_PIN_ST_S2_CD_ST             (1 << 1)
 150
 151static void menelaus_work(struct work_struct *_menelaus);
 152
 153struct menelaus_chip {
 154        struct mutex            lock;
 155        struct i2c_client       *client;
 156        struct work_struct      work;
 157#ifdef CONFIG_RTC_DRV_TWL92330
 158        struct rtc_device       *rtc;
 159        u8                      rtc_control;
 160        unsigned                uie:1;
 161#endif
 162        unsigned                vcore_hw_mode:1;
 163        u8                      mask1, mask2;
 164        void                    (*handlers[16])(struct menelaus_chip *);
 165        void                    (*mmc_callback)(void *data, u8 mask);
 166        void                    *mmc_callback_data;
 167};
 168
 169static struct menelaus_chip *the_menelaus;
 170
 171static int menelaus_write_reg(int reg, u8 value)
 172{
 173        int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
 174
 175        if (val < 0) {
 176                pr_err(DRIVER_NAME ": write error");
 177                return val;
 178        }
 179
 180        return 0;
 181}
 182
 183static int menelaus_read_reg(int reg)
 184{
 185        int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
 186
 187        if (val < 0)
 188                pr_err(DRIVER_NAME ": read error");
 189
 190        return val;
 191}
 192
 193static int menelaus_enable_irq(int irq)
 194{
 195        if (irq > 7) {
 196                irq -= 8;
 197                the_menelaus->mask2 &= ~(1 << irq);
 198                return menelaus_write_reg(MENELAUS_INT_MASK2,
 199                                the_menelaus->mask2);
 200        } else {
 201                the_menelaus->mask1 &= ~(1 << irq);
 202                return menelaus_write_reg(MENELAUS_INT_MASK1,
 203                                the_menelaus->mask1);
 204        }
 205}
 206
 207static int menelaus_disable_irq(int irq)
 208{
 209        if (irq > 7) {
 210                irq -= 8;
 211                the_menelaus->mask2 |= (1 << irq);
 212                return menelaus_write_reg(MENELAUS_INT_MASK2,
 213                                the_menelaus->mask2);
 214        } else {
 215                the_menelaus->mask1 |= (1 << irq);
 216                return menelaus_write_reg(MENELAUS_INT_MASK1,
 217                                the_menelaus->mask1);
 218        }
 219}
 220
 221static int menelaus_ack_irq(int irq)
 222{
 223        if (irq > 7)
 224                return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
 225        else
 226                return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
 227}
 228
 229/* Adds a handler for an interrupt. Does not run in interrupt context */
 230static int menelaus_add_irq_work(int irq,
 231                void (*handler)(struct menelaus_chip *))
 232{
 233        int ret = 0;
 234
 235        mutex_lock(&the_menelaus->lock);
 236        the_menelaus->handlers[irq] = handler;
 237        ret = menelaus_enable_irq(irq);
 238        mutex_unlock(&the_menelaus->lock);
 239
 240        return ret;
 241}
 242
 243/* Removes handler for an interrupt */
 244static int menelaus_remove_irq_work(int irq)
 245{
 246        int ret = 0;
 247
 248        mutex_lock(&the_menelaus->lock);
 249        ret = menelaus_disable_irq(irq);
 250        the_menelaus->handlers[irq] = NULL;
 251        mutex_unlock(&the_menelaus->lock);
 252
 253        return ret;
 254}
 255
 256/*
 257 * Gets scheduled when a card detect interrupt happens. Note that in some cases
 258 * this line is wired to card cover switch rather than the card detect switch
 259 * in each slot. In this case the cards are not seen by menelaus.
 260 * FIXME: Add handling for D1 too
 261 */
 262static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
 263{
 264        int reg;
 265        unsigned char card_mask = 0;
 266
 267        reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
 268        if (reg < 0)
 269                return;
 270
 271        if (!(reg & 0x1))
 272                card_mask |= MCT_PIN_ST_S1_CD_ST;
 273
 274        if (!(reg & 0x2))
 275                card_mask |= MCT_PIN_ST_S2_CD_ST;
 276
 277        if (menelaus_hw->mmc_callback)
 278                menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
 279                                          card_mask);
 280}
 281
 282/*
 283 * Toggles the MMC slots between open-drain and push-pull mode.
 284 */
 285int menelaus_set_mmc_opendrain(int slot, int enable)
 286{
 287        int ret, val;
 288
 289        if (slot != 1 && slot != 2)
 290                return -EINVAL;
 291        mutex_lock(&the_menelaus->lock);
 292        ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
 293        if (ret < 0) {
 294                mutex_unlock(&the_menelaus->lock);
 295                return ret;
 296        }
 297        val = ret;
 298        if (slot == 1) {
 299                if (enable)
 300                        val |= MCT_CTRL1_S1_CMD_OD;
 301                else
 302                        val &= ~MCT_CTRL1_S1_CMD_OD;
 303        } else {
 304                if (enable)
 305                        val |= MCT_CTRL1_S2_CMD_OD;
 306                else
 307                        val &= ~MCT_CTRL1_S2_CMD_OD;
 308        }
 309        ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
 310        mutex_unlock(&the_menelaus->lock);
 311
 312        return ret;
 313}
 314EXPORT_SYMBOL(menelaus_set_mmc_opendrain);
 315
 316int menelaus_set_slot_sel(int enable)
 317{
 318        int ret;
 319
 320        mutex_lock(&the_menelaus->lock);
 321        ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
 322        if (ret < 0)
 323                goto out;
 324        ret |= GPIO2_DIR_INPUT;
 325        if (enable)
 326                ret |= GPIO_CTRL_SLOTSELEN;
 327        else
 328                ret &= ~GPIO_CTRL_SLOTSELEN;
 329        ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
 330out:
 331        mutex_unlock(&the_menelaus->lock);
 332        return ret;
 333}
 334EXPORT_SYMBOL(menelaus_set_slot_sel);
 335
 336int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)
 337{
 338        int ret, val;
 339
 340        if (slot != 1 && slot != 2)
 341                return -EINVAL;
 342        if (power >= 3)
 343                return -EINVAL;
 344
 345        mutex_lock(&the_menelaus->lock);
 346
 347        ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
 348        if (ret < 0)
 349                goto out;
 350        val = ret;
 351        if (slot == 1) {
 352                if (cd_en)
 353                        val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;
 354                else
 355                        val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);
 356        } else {
 357                if (cd_en)
 358                        val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;
 359                else
 360                        val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);
 361        }
 362        ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);
 363        if (ret < 0)
 364                goto out;
 365
 366        ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);
 367        if (ret < 0)
 368                goto out;
 369        val = ret;
 370        if (slot == 1) {
 371                if (enable)
 372                        val |= MCT_CTRL3_SLOT1_EN;
 373                else
 374                        val &= ~MCT_CTRL3_SLOT1_EN;
 375        } else {
 376                int b;
 377
 378                if (enable)
 379                        val |= MCT_CTRL3_SLOT2_EN;
 380                else
 381                        val &= ~MCT_CTRL3_SLOT2_EN;
 382                b = menelaus_read_reg(MENELAUS_MCT_CTRL2);
 383                b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1);
 384                b |= power;
 385                ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);
 386                if (ret < 0)
 387                        goto out;
 388        }
 389        /* Disable autonomous shutdown */
 390        val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN);
 391        ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
 392out:
 393        mutex_unlock(&the_menelaus->lock);
 394        return ret;
 395}
 396EXPORT_SYMBOL(menelaus_set_mmc_slot);
 397
 398int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
 399                                   void *data)
 400{
 401        int ret = 0;
 402
 403        the_menelaus->mmc_callback_data = data;
 404        the_menelaus->mmc_callback = callback;
 405        ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
 406                                    menelaus_mmc_cd_work);
 407        if (ret < 0)
 408                return ret;
 409        ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,
 410                                    menelaus_mmc_cd_work);
 411        if (ret < 0)
 412                return ret;
 413        ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,
 414                                    menelaus_mmc_cd_work);
 415        if (ret < 0)
 416                return ret;
 417        ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,
 418                                    menelaus_mmc_cd_work);
 419
 420        return ret;
 421}
 422EXPORT_SYMBOL(menelaus_register_mmc_callback);
 423
 424void menelaus_unregister_mmc_callback(void)
 425{
 426        menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);
 427        menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);
 428        menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
 429        menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
 430
 431        the_menelaus->mmc_callback = NULL;
 432        the_menelaus->mmc_callback_data = NULL;
 433}
 434EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
 435
 436struct menelaus_vtg {
 437        const char *name;
 438        u8 vtg_reg;
 439        u8 vtg_shift;
 440        u8 vtg_bits;
 441        u8 mode_reg;
 442};
 443
 444struct menelaus_vtg_value {
 445        u16 vtg;
 446        u16 val;
 447};
 448
 449static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
 450                                int vtg_val, int mode)
 451{
 452        int val, ret;
 453        struct i2c_client *c = the_menelaus->client;
 454
 455        mutex_lock(&the_menelaus->lock);
 456
 457        ret = menelaus_read_reg(vtg->vtg_reg);
 458        if (ret < 0)
 459                goto out;
 460        val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
 461        val |= vtg_val << vtg->vtg_shift;
 462
 463        dev_dbg(&c->dev, "Setting voltage '%s'"
 464                         "to %d mV (reg 0x%02x, val 0x%02x)\n",
 465                        vtg->name, mV, vtg->vtg_reg, val);
 466
 467        ret = menelaus_write_reg(vtg->vtg_reg, val);
 468        if (ret < 0)
 469                goto out;
 470        ret = menelaus_write_reg(vtg->mode_reg, mode);
 471out:
 472        mutex_unlock(&the_menelaus->lock);
 473        if (ret == 0) {
 474                /* Wait for voltage to stabilize */
 475                msleep(1);
 476        }
 477        return ret;
 478}
 479
 480static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,
 481                                  int n)
 482{
 483        int i;
 484
 485        for (i = 0; i < n; i++, tbl++)
 486                if (tbl->vtg == vtg)
 487                        return tbl->val;
 488        return -EINVAL;
 489}
 490
 491/*
 492 * Vcore can be programmed in two ways:
 493 * SW-controlled: Required voltage is programmed into VCORE_CTRL1
 494 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
 495 * and VCORE_CTRL4
 496 *
 497 * Call correct 'set' function accordingly
 498 */
 499
 500static const struct menelaus_vtg_value vcore_values[] = {
 501        { 1000, 0 },
 502        { 1025, 1 },
 503        { 1050, 2 },
 504        { 1075, 3 },
 505        { 1100, 4 },
 506        { 1125, 5 },
 507        { 1150, 6 },
 508        { 1175, 7 },
 509        { 1200, 8 },
 510        { 1225, 9 },
 511        { 1250, 10 },
 512        { 1275, 11 },
 513        { 1300, 12 },
 514        { 1325, 13 },
 515        { 1350, 14 },
 516        { 1375, 15 },
 517        { 1400, 16 },
 518        { 1425, 17 },
 519        { 1450, 18 },
 520};
 521
 522int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
 523{
 524        int fval, rval, val, ret;
 525        struct i2c_client *c = the_menelaus->client;
 526
 527        rval = menelaus_get_vtg_value(roof_mV, vcore_values,
 528                                      ARRAY_SIZE(vcore_values));
 529        if (rval < 0)
 530                return -EINVAL;
 531        fval = menelaus_get_vtg_value(floor_mV, vcore_values,
 532                                      ARRAY_SIZE(vcore_values));
 533        if (fval < 0)
 534                return -EINVAL;
 535
 536        dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
 537               floor_mV, roof_mV);
 538
 539        mutex_lock(&the_menelaus->lock);
 540        ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
 541        if (ret < 0)
 542                goto out;
 543        ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
 544        if (ret < 0)
 545                goto out;
 546        if (!the_menelaus->vcore_hw_mode) {
 547                val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
 548                /* HW mode, turn OFF byte comparator */
 549                val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP);
 550                ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
 551                the_menelaus->vcore_hw_mode = 1;
 552        }
 553        msleep(1);
 554out:
 555        mutex_unlock(&the_menelaus->lock);
 556        return ret;
 557}
 558
 559static const struct menelaus_vtg vmem_vtg = {
 560        .name = "VMEM",
 561        .vtg_reg = MENELAUS_LDO_CTRL1,
 562        .vtg_shift = 0,
 563        .vtg_bits = 2,
 564        .mode_reg = MENELAUS_LDO_CTRL3,
 565};
 566
 567static const struct menelaus_vtg_value vmem_values[] = {
 568        { 1500, 0 },
 569        { 1800, 1 },
 570        { 1900, 2 },
 571        { 2500, 3 },
 572};
 573
 574int menelaus_set_vmem(unsigned int mV)
 575{
 576        int val;
 577
 578        if (mV == 0)
 579                return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);
 580
 581        val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));
 582        if (val < 0)
 583                return -EINVAL;
 584        return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);
 585}
 586EXPORT_SYMBOL(menelaus_set_vmem);
 587
 588static const struct menelaus_vtg vio_vtg = {
 589        .name = "VIO",
 590        .vtg_reg = MENELAUS_LDO_CTRL1,
 591        .vtg_shift = 2,
 592        .vtg_bits = 2,
 593        .mode_reg = MENELAUS_LDO_CTRL4,
 594};
 595
 596static const struct menelaus_vtg_value vio_values[] = {
 597        { 1500, 0 },
 598        { 1800, 1 },
 599        { 2500, 2 },
 600        { 2800, 3 },
 601};
 602
 603int menelaus_set_vio(unsigned int mV)
 604{
 605        int val;
 606
 607        if (mV == 0)
 608                return menelaus_set_voltage(&vio_vtg, 0, 0, 0);
 609
 610        val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));
 611        if (val < 0)
 612                return -EINVAL;
 613        return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);
 614}
 615EXPORT_SYMBOL(menelaus_set_vio);
 616
 617static const struct menelaus_vtg_value vdcdc_values[] = {
 618        { 1500, 0 },
 619        { 1800, 1 },
 620        { 2000, 2 },
 621        { 2200, 3 },
 622        { 2400, 4 },
 623        { 2800, 5 },
 624        { 3000, 6 },
 625        { 3300, 7 },
 626};
 627
 628static const struct menelaus_vtg vdcdc2_vtg = {
 629        .name = "VDCDC2",
 630        .vtg_reg = MENELAUS_DCDC_CTRL1,
 631        .vtg_shift = 0,
 632        .vtg_bits = 3,
 633        .mode_reg = MENELAUS_DCDC_CTRL2,
 634};
 635
 636static const struct menelaus_vtg vdcdc3_vtg = {
 637        .name = "VDCDC3",
 638        .vtg_reg = MENELAUS_DCDC_CTRL1,
 639        .vtg_shift = 3,
 640        .vtg_bits = 3,
 641        .mode_reg = MENELAUS_DCDC_CTRL3,
 642};
 643
 644int menelaus_set_vdcdc(int dcdc, unsigned int mV)
 645{
 646        const struct menelaus_vtg *vtg;
 647        int val;
 648
 649        if (dcdc != 2 && dcdc != 3)
 650                return -EINVAL;
 651        if (dcdc == 2)
 652                vtg = &vdcdc2_vtg;
 653        else
 654                vtg = &vdcdc3_vtg;
 655
 656        if (mV == 0)
 657                return menelaus_set_voltage(vtg, 0, 0, 0);
 658
 659        val = menelaus_get_vtg_value(mV, vdcdc_values,
 660                                     ARRAY_SIZE(vdcdc_values));
 661        if (val < 0)
 662                return -EINVAL;
 663        return menelaus_set_voltage(vtg, mV, val, 0x03);
 664}
 665
 666static const struct menelaus_vtg_value vmmc_values[] = {
 667        { 1850, 0 },
 668        { 2800, 1 },
 669        { 3000, 2 },
 670        { 3100, 3 },
 671};
 672
 673static const struct menelaus_vtg vmmc_vtg = {
 674        .name = "VMMC",
 675        .vtg_reg = MENELAUS_LDO_CTRL1,
 676        .vtg_shift = 6,
 677        .vtg_bits = 2,
 678        .mode_reg = MENELAUS_LDO_CTRL7,
 679};
 680
 681int menelaus_set_vmmc(unsigned int mV)
 682{
 683        int val;
 684
 685        if (mV == 0)
 686                return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);
 687
 688        val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));
 689        if (val < 0)
 690                return -EINVAL;
 691        return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);
 692}
 693EXPORT_SYMBOL(menelaus_set_vmmc);
 694
 695
 696static const struct menelaus_vtg_value vaux_values[] = {
 697        { 1500, 0 },
 698        { 1800, 1 },
 699        { 2500, 2 },
 700        { 2800, 3 },
 701};
 702
 703static const struct menelaus_vtg vaux_vtg = {
 704        .name = "VAUX",
 705        .vtg_reg = MENELAUS_LDO_CTRL1,
 706        .vtg_shift = 4,
 707        .vtg_bits = 2,
 708        .mode_reg = MENELAUS_LDO_CTRL6,
 709};
 710
 711int menelaus_set_vaux(unsigned int mV)
 712{
 713        int val;
 714
 715        if (mV == 0)
 716                return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);
 717
 718        val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));
 719        if (val < 0)
 720                return -EINVAL;
 721        return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);
 722}
 723EXPORT_SYMBOL(menelaus_set_vaux);
 724
 725int menelaus_get_slot_pin_states(void)
 726{
 727        return menelaus_read_reg(MENELAUS_MCT_PIN_ST);
 728}
 729EXPORT_SYMBOL(menelaus_get_slot_pin_states);
 730
 731int menelaus_set_regulator_sleep(int enable, u32 val)
 732{
 733        int t, ret;
 734        struct i2c_client *c = the_menelaus->client;
 735
 736        mutex_lock(&the_menelaus->lock);
 737        ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
 738        if (ret < 0)
 739                goto out;
 740
 741        dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
 742
 743        ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
 744        if (ret < 0)
 745                goto out;
 746        t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);
 747        if (enable)
 748                ret |= t;
 749        else
 750                ret &= ~t;
 751        ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
 752out:
 753        mutex_unlock(&the_menelaus->lock);
 754        return ret;
 755}
 756
 757/*-----------------------------------------------------------------------*/
 758
 759/* Handles Menelaus interrupts. Does not run in interrupt context */
 760static void menelaus_work(struct work_struct *_menelaus)
 761{
 762        struct menelaus_chip *menelaus =
 763                        container_of(_menelaus, struct menelaus_chip, work);
 764        void (*handler)(struct menelaus_chip *menelaus);
 765
 766        while (1) {
 767                unsigned isr;
 768
 769                isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
 770                                & ~menelaus->mask2) << 8;
 771                isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
 772                                & ~menelaus->mask1;
 773                if (!isr)
 774                        break;
 775
 776                while (isr) {
 777                        int irq = fls(isr) - 1;
 778                        isr &= ~(1 << irq);
 779
 780                        mutex_lock(&menelaus->lock);
 781                        menelaus_disable_irq(irq);
 782                        menelaus_ack_irq(irq);
 783                        handler = menelaus->handlers[irq];
 784                        if (handler)
 785                                handler(menelaus);
 786                        menelaus_enable_irq(irq);
 787                        mutex_unlock(&menelaus->lock);
 788                }
 789        }
 790        enable_irq(menelaus->client->irq);
 791}
 792
 793/*
 794 * We cannot use I2C in interrupt context, so we just schedule work.
 795 */
 796static irqreturn_t menelaus_irq(int irq, void *_menelaus)
 797{
 798        struct menelaus_chip *menelaus = _menelaus;
 799
 800        disable_irq_nosync(irq);
 801        (void)schedule_work(&menelaus->work);
 802
 803        return IRQ_HANDLED;
 804}
 805
 806/*-----------------------------------------------------------------------*/
 807
 808/*
 809 * The RTC needs to be set once, then it runs on backup battery power.
 810 * It supports alarms, including system wake alarms (from some modes);
 811 * and 1/second IRQs if requested.
 812 */
 813#ifdef CONFIG_RTC_DRV_TWL92330
 814
 815#define RTC_CTRL_RTC_EN         (1 << 0)
 816#define RTC_CTRL_AL_EN          (1 << 1)
 817#define RTC_CTRL_MODE12         (1 << 2)
 818#define RTC_CTRL_EVERY_MASK     (3 << 3)
 819#define RTC_CTRL_EVERY_SEC      (0 << 3)
 820#define RTC_CTRL_EVERY_MIN      (1 << 3)
 821#define RTC_CTRL_EVERY_HR       (2 << 3)
 822#define RTC_CTRL_EVERY_DAY      (3 << 3)
 823
 824#define RTC_UPDATE_EVERY        0x08
 825
 826#define RTC_HR_PM               (1 << 7)
 827
 828static void menelaus_to_time(char *regs, struct rtc_time *t)
 829{
 830        t->tm_sec = bcd2bin(regs[0]);
 831        t->tm_min = bcd2bin(regs[1]);
 832        if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
 833                t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1;
 834                if (regs[2] & RTC_HR_PM)
 835                        t->tm_hour += 12;
 836        } else
 837                t->tm_hour = bcd2bin(regs[2] & 0x3f);
 838        t->tm_mday = bcd2bin(regs[3]);
 839        t->tm_mon = bcd2bin(regs[4]) - 1;
 840        t->tm_year = bcd2bin(regs[5]) + 100;
 841}
 842
 843static int time_to_menelaus(struct rtc_time *t, int regnum)
 844{
 845        int     hour, status;
 846
 847        status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));
 848        if (status < 0)
 849                goto fail;
 850
 851        status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));
 852        if (status < 0)
 853                goto fail;
 854
 855        if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
 856                hour = t->tm_hour + 1;
 857                if (hour > 12)
 858                        hour = RTC_HR_PM | bin2bcd(hour - 12);
 859                else
 860                        hour = bin2bcd(hour);
 861        } else
 862                hour = bin2bcd(t->tm_hour);
 863        status = menelaus_write_reg(regnum++, hour);
 864        if (status < 0)
 865                goto fail;
 866
 867        status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));
 868        if (status < 0)
 869                goto fail;
 870
 871        status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));
 872        if (status < 0)
 873                goto fail;
 874
 875        status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));
 876        if (status < 0)
 877                goto fail;
 878
 879        return 0;
 880fail:
 881        dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
 882                        --regnum, status);
 883        return status;
 884}
 885
 886static int menelaus_read_time(struct device *dev, struct rtc_time *t)
 887{
 888        struct i2c_msg  msg[2];
 889        char            regs[7];
 890        int             status;
 891
 892        /* block read date and time registers */
 893        regs[0] = MENELAUS_RTC_SEC;
 894
 895        msg[0].addr = MENELAUS_I2C_ADDRESS;
 896        msg[0].flags = 0;
 897        msg[0].len = 1;
 898        msg[0].buf = regs;
 899
 900        msg[1].addr = MENELAUS_I2C_ADDRESS;
 901        msg[1].flags = I2C_M_RD;
 902        msg[1].len = sizeof(regs);
 903        msg[1].buf = regs;
 904
 905        status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
 906        if (status != 2) {
 907                dev_err(dev, "%s error %d\n", "read", status);
 908                return -EIO;
 909        }
 910
 911        menelaus_to_time(regs, t);
 912        t->tm_wday = bcd2bin(regs[6]);
 913
 914        return 0;
 915}
 916
 917static int menelaus_set_time(struct device *dev, struct rtc_time *t)
 918{
 919        int             status;
 920
 921        /* write date and time registers */
 922        status = time_to_menelaus(t, MENELAUS_RTC_SEC);
 923        if (status < 0)
 924                return status;
 925        status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));
 926        if (status < 0) {
 927                dev_err(&the_menelaus->client->dev, "rtc write reg %02x "
 928                                "err %d\n", MENELAUS_RTC_WKDAY, status);
 929                return status;
 930        }
 931
 932        /* now commit the write */
 933        status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
 934        if (status < 0)
 935                dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
 936                                status);
 937
 938        return 0;
 939}
 940
 941static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
 942{
 943        struct i2c_msg  msg[2];
 944        char            regs[6];
 945        int             status;
 946
 947        /* block read alarm registers */
 948        regs[0] = MENELAUS_RTC_AL_SEC;
 949
 950        msg[0].addr = MENELAUS_I2C_ADDRESS;
 951        msg[0].flags = 0;
 952        msg[0].len = 1;
 953        msg[0].buf = regs;
 954
 955        msg[1].addr = MENELAUS_I2C_ADDRESS;
 956        msg[1].flags = I2C_M_RD;
 957        msg[1].len = sizeof(regs);
 958        msg[1].buf = regs;
 959
 960        status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
 961        if (status != 2) {
 962                dev_err(dev, "%s error %d\n", "alarm read", status);
 963                return -EIO;
 964        }
 965
 966        menelaus_to_time(regs, &w->time);
 967
 968        w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
 969
 970        /* NOTE we *could* check if actually pending... */
 971        w->pending = 0;
 972
 973        return 0;
 974}
 975
 976static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
 977{
 978        int             status;
 979
 980        if (the_menelaus->client->irq <= 0 && w->enabled)
 981                return -ENODEV;
 982
 983        /* clear previous alarm enable */
 984        if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
 985                the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
 986                status = menelaus_write_reg(MENELAUS_RTC_CTRL,
 987                                the_menelaus->rtc_control);
 988                if (status < 0)
 989                        return status;
 990        }
 991
 992        /* write alarm registers */
 993        status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
 994        if (status < 0)
 995                return status;
 996
 997        /* enable alarm if requested */
 998        if (w->enabled) {
 999                the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1000                status = menelaus_write_reg(MENELAUS_RTC_CTRL,
1001                                the_menelaus->rtc_control);
1002        }
1003
1004        return status;
1005}
1006
1007#ifdef CONFIG_RTC_INTF_DEV
1008
1009static void menelaus_rtc_update_work(struct menelaus_chip *m)
1010{
1011        /* report 1/sec update */
1012        rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
1013}
1014
1015static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
1016{
1017        int     status;
1018
1019        if (the_menelaus->client->irq <= 0)
1020                return -ENOIOCTLCMD;
1021
1022        switch (cmd) {
1023        /* alarm IRQ */
1024        case RTC_AIE_ON:
1025                if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
1026                        return 0;
1027                the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
1028                break;
1029        case RTC_AIE_OFF:
1030                if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
1031                        return 0;
1032                the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1033                break;
1034        /* 1/second "update" IRQ */
1035        case RTC_UIE_ON:
1036                if (the_menelaus->uie)
1037                        return 0;
1038                status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1039                status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
1040                                menelaus_rtc_update_work);
1041                if (status == 0)
1042                        the_menelaus->uie = 1;
1043                return status;
1044        case RTC_UIE_OFF:
1045                if (!the_menelaus->uie)
1046                        return 0;
1047                status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
1048                if (status == 0)
1049                        the_menelaus->uie = 0;
1050                return status;
1051        default:
1052                return -ENOIOCTLCMD;
1053        }
1054        return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1055}
1056
1057#else
1058#define menelaus_ioctl  NULL
1059#endif
1060
1061/* REVISIT no compensation register support ... */
1062
1063static const struct rtc_class_ops menelaus_rtc_ops = {
1064        .ioctl                  = menelaus_ioctl,
1065        .read_time              = menelaus_read_time,
1066        .set_time               = menelaus_set_time,
1067        .read_alarm             = menelaus_read_alarm,
1068        .set_alarm              = menelaus_set_alarm,
1069};
1070
1071static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
1072{
1073        /* report alarm */
1074        rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
1075
1076        /* then disable it; alarms are oneshot */
1077        the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
1078        menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
1079}
1080
1081static inline void menelaus_rtc_init(struct menelaus_chip *m)
1082{
1083        int     alarm = (m->client->irq > 0);
1084        int     err;
1085
1086        /* assume 32KDETEN pin is pulled high */
1087        if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
1088                dev_dbg(&m->client->dev, "no 32k oscillator\n");
1089                return;
1090        }
1091
1092        m->rtc = devm_rtc_allocate_device(&m->client->dev);
1093        if (IS_ERR(m->rtc))
1094                return;
1095
1096        m->rtc->ops = &menelaus_rtc_ops;
1097
1098        /* support RTC alarm; it can issue wakeups */
1099        if (alarm) {
1100                if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
1101                                menelaus_rtc_alarm_work) < 0) {
1102                        dev_err(&m->client->dev, "can't handle RTC alarm\n");
1103                        return;
1104                }
1105                device_init_wakeup(&m->client->dev, 1);
1106        }
1107
1108        /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
1109        m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
1110        if (!(m->rtc_control & RTC_CTRL_RTC_EN)
1111                        || (m->rtc_control & RTC_CTRL_AL_EN)
1112                        || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
1113                if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
1114                        dev_warn(&m->client->dev, "rtc clock needs setting\n");
1115                        m->rtc_control |= RTC_CTRL_RTC_EN;
1116                }
1117                m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
1118                m->rtc_control &= ~RTC_CTRL_AL_EN;
1119                menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
1120        }
1121
1122        err = devm_rtc_register_device(m->rtc);
1123        if (err) {
1124                if (alarm) {
1125                        menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
1126                        device_init_wakeup(&m->client->dev, 0);
1127                }
1128                the_menelaus->rtc = NULL;
1129        }
1130}
1131
1132#else
1133
1134static inline void menelaus_rtc_init(struct menelaus_chip *m)
1135{
1136        /* nothing */
1137}
1138
1139#endif
1140
1141/*-----------------------------------------------------------------------*/
1142
1143static struct i2c_driver menelaus_i2c_driver;
1144
1145static int menelaus_probe(struct i2c_client *client,
1146                          const struct i2c_device_id *id)
1147{
1148        struct menelaus_chip    *menelaus;
1149        int                     rev = 0;
1150        int                     err = 0;
1151        struct menelaus_platform_data *menelaus_pdata =
1152                                        dev_get_platdata(&client->dev);
1153
1154        if (the_menelaus) {
1155                dev_dbg(&client->dev, "only one %s for now\n",
1156                                DRIVER_NAME);
1157                return -ENODEV;
1158        }
1159
1160        menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL);
1161        if (!menelaus)
1162                return -ENOMEM;
1163
1164        i2c_set_clientdata(client, menelaus);
1165
1166        the_menelaus = menelaus;
1167        menelaus->client = client;
1168
1169        /* If a true probe check the device */
1170        rev = menelaus_read_reg(MENELAUS_REV);
1171        if (rev < 0) {
1172                pr_err(DRIVER_NAME ": device not found");
1173                return -ENODEV;
1174        }
1175
1176        /* Ack and disable all Menelaus interrupts */
1177        menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
1178        menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
1179        menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
1180        menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
1181        menelaus->mask1 = 0xff;
1182        menelaus->mask2 = 0xff;
1183
1184        /* Set output buffer strengths */
1185        menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
1186
1187        if (client->irq > 0) {
1188                err = request_irq(client->irq, menelaus_irq, 0,
1189                                  DRIVER_NAME, menelaus);
1190                if (err) {
1191                        dev_dbg(&client->dev,  "can't get IRQ %d, err %d\n",
1192                                        client->irq, err);
1193                        return err;
1194                }
1195        }
1196
1197        mutex_init(&menelaus->lock);
1198        INIT_WORK(&menelaus->work, menelaus_work);
1199
1200        pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
1201
1202        err = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
1203        if (err < 0)
1204                goto fail;
1205        if (err & VCORE_CTRL1_HW_NSW)
1206                menelaus->vcore_hw_mode = 1;
1207        else
1208                menelaus->vcore_hw_mode = 0;
1209
1210        if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
1211                err = menelaus_pdata->late_init(&client->dev);
1212                if (err < 0)
1213                        goto fail;
1214        }
1215
1216        menelaus_rtc_init(menelaus);
1217
1218        return 0;
1219fail:
1220        free_irq(client->irq, menelaus);
1221        flush_work(&menelaus->work);
1222        return err;
1223}
1224
1225static int menelaus_remove(struct i2c_client *client)
1226{
1227        struct menelaus_chip    *menelaus = i2c_get_clientdata(client);
1228
1229        free_irq(client->irq, menelaus);
1230        flush_work(&menelaus->work);
1231        the_menelaus = NULL;
1232        return 0;
1233}
1234
1235static const struct i2c_device_id menelaus_id[] = {
1236        { "menelaus", 0 },
1237        { }
1238};
1239MODULE_DEVICE_TABLE(i2c, menelaus_id);
1240
1241static struct i2c_driver menelaus_i2c_driver = {
1242        .driver = {
1243                .name           = DRIVER_NAME,
1244        },
1245        .probe          = menelaus_probe,
1246        .remove         = menelaus_remove,
1247        .id_table       = menelaus_id,
1248};
1249
1250module_i2c_driver(menelaus_i2c_driver);
1251
1252MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
1253MODULE_DESCRIPTION("I2C interface for Menelaus.");
1254MODULE_LICENSE("GPL");
1255