drivers/power/bq25700_charger.c

   1 /*
   2  * TI BQ257000 charger driver
   3  *
   4  * Copyright (C) 2016 Rockchip Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <linux/power/bq25700-charge.h>
  19 #include <linux/i2c.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/irq.h>
  22 #include <linux/mfd/core.h>
  23 #include <linux/module.h>
  24 #include <linux/regmap.h>
  25 #include <linux/of_device.h>
  26 #include <linux/delay.h>
  27 #include <linux/usb/phy.h>
  28 #include <linux/power/rk_usbbc.h>
  29 #include <linux/extcon.h>
  30 #include <linux/delay.h>
  31 #include <linux/power_supply.h>
  32 #include <linux/gpio.h>
  33 #include <linux/of_gpio.h>
  34 #include <linux/rk_keys.h>
  35
  36 static int dbg_enable;
  37 module_param_named(dbg_level, dbg_enable, int, 0644);
  38
  39 #define DBG(args...) \
  40         do { \
  41                 if (dbg_enable) { \
  42                         pr_info(args); \
  43                 } \
  44         } while (0)
  45
  46 #define bq25700_info(fmt, args...) pr_info("bq25700: "fmt, ##args)
  47
  48 #define BQ25700_MANUFACTURER            "Texas Instruments"
  49 #define BQ25700_ID                      0x59
  50
  51 #define DEFAULT_INPUTVOL                ((5000 - 1280) * 1000)
  52 #define MAX_INPUTVOLTAGE                24000000
  53 #define MAX_INPUTCURRENT                6350000
  54 #define MAX_CHARGEVOLTAGE               16800000
  55 #define MAX_CHARGECURRETNT              8128000
  56 #define MAX_OTGVOLTAGE                  20800000
  57 #define MAX_OTGCURRENT                  6350000
  58
  59 enum bq25700_fields {
  60         EN_LWPWR, WDTWR_ADJ, IDPM_AUTO_DISABLE,
  61         EN_OOA, PWM_FREQ, EN_LEARN, IADP_GAIN, IBAT_GAIN,
  62         EN_LDO, EN_IDPM, CHRG_INHIBIT,/*reg12h*/
  63         CHARGE_CURRENT,/*reg14h*/
  64         MAX_CHARGE_VOLTAGE,/*reg15h*/
  65
  66         AC_STAT, ICO_DONE, IN_VINDPM, IN_IINDPM, IN_FCHRG, IN_PCHRG, IN_OTG,
  67         F_ACOV, F_BATOC, F_ACOC, SYSOVP_STAT, F_LATCHOFF, F_OTG_OVP, F_OTG_OCP,
  68         /*reg20h*/
  69         STAT_COMP, STAT_ICRIT, STAT_INOM, STAT_IDCHG, STAT_VSYS, STAT_BAT_REMOV,
  70         STAT_ADP_REMOV,/*reg21h*/
  71         INPUT_CURRENT_DPM,/*reg22h*/
  72         OUTPUT_INPUT_VOL, OUTPUT_SYS_POWER,/*reg23h*/
  73         OUTPUT_DSG_CUR, OUTPUT_CHG_CUR,/*reg24h*/
  74         OUTPUT_INPUT_CUR, OUTPUT_CMPIN_VOL,/*reg25h*/
  75         OUTPUT_SYS_VOL, OUTPUT_BAT_VOL,/*reg26h*/
  76
  77         EN_IBAT, EN_PROCHOT_LPWR, EN_PSYS, RSNS_RAC, RSNS_RSR,
  78         PSYS_RATIO, CMP_REF,    CMP_POL, CMP_DEG, FORCE_LATCHOFF,
  79         EN_SHIP_DCHG, AUTO_WAKEUP_EN, /*reg30h*/
  80         PKPWR_TOVLD_REG, EN_PKPWR_IDPM, EN_PKPWR_VSYS, PKPWER_OVLD_STAT,
  81         PKPWR_RELAX_STAT, PKPWER_TMAX,  EN_EXTILIM, EN_ICHG_IDCHG, Q2_OCP,
  82         ACX_OCP, EN_ACOC, ACOC_VTH, EN_BATOC, BATCOC_VTH,/*reg31h*/
  83         EN_HIZ, RESET_REG, RESET_VINDPM, EN_OTG, EN_ICO_MODE, BATFETOFF_HIZ,
  84         PSYS_OTG_IDCHG,/*reg32h*/
  85         ILIM2_VTH, ICRIT_DEG, VSYS_VTH, EN_PROCHOT_EXT, PROCHOT_WIDTH,
  86         PROCHOT_CLEAR, INOM_DEG,/*reg33h*/
  87         IDCHG_VTH, IDCHG_DEG, PROCHOT_PROFILE_COMP, PROCHOT_PROFILE_ICRIT,
  88         PROCHOT_PROFILE_INOM, PROCHOT_PROFILE_IDCHG,
  89         PROCHOT_PROFILE_VSYS, PROCHOT_PROFILE_BATPRES, PROCHOT_PROFILE_ACOK,
  90         /*reg34h*/
  91         ADC_CONV, ADC_START, ADC_FULLSCALE, EN_ADC_CMPIN, EN_ADC_VBUS,
  92         EN_ADC_PSYS, EN_ADC_IIN, EN_ADC_IDCHG, EN_ADC_ICHG, EN_ADC_VSYS,
  93         EN_ADC_VBAT,/*reg35h*/
  94
  95         OTG_VOLTAGE,/*reg3bh*/
  96         OTG_CURRENT,/*reg3ch*/
  97         INPUT_VOLTAGE,/*reg3dh*/
  98         MIN_SYS_VOTAGE,/*reg3eh*/
  99         INPUT_CURRENT,/*reg3fh*/
 100
 101         MANUFACTURE_ID,/*regfeh*/
 102         DEVICE_ID,/*regffh*/
 103
 104         F_MAX_FIELDS
 105 };
 106
 107 enum charger_t {
 108         USB_TYPE_UNKNOWN_CHARGER,
 109         USB_TYPE_NONE_CHARGER,
 110         USB_TYPE_USB_CHARGER,
 111         USB_TYPE_AC_CHARGER,
 112         USB_TYPE_CDP_CHARGER,
 113         DC_TYPE_DC_CHARGER,
 114         DC_TYPE_NONE_CHARGER,
 115 };
 116
 117 enum usb_status_t {
 118         USB_STATUS_NONE,
 119         USB_STATUS_USB,
 120         USB_STATUS_AC,
 121         USB_STATUS_PD,
 122         USB_STATUS_OTG,
 123 };
 124
 125 enum tpyec_port_t {
 126         USB_TYPEC_0,
 127         USB_TYPEC_1,
 128 };
 129
 130 /* initial field values, converted to register values */
 131 struct bq25700_init_data {
 132         u32 ichg;       /* charge current               */
 133         u32 max_chg_vol;        /*max charge voltage*/
 134         u32 input_voltage;      /*input voltage*/
 135         u32 input_current;      /*input current*/
 136         u32 input_current_sdp;
 137         u32 input_current_dcp;
 138         u32 input_current_cdp;
 139         u32 sys_min_voltage;    /*mininum system voltage*/
 140         u32 otg_voltage;        /*OTG voltage*/
 141         u32 otg_current;        /*OTG current*/
 142 };
 143
 144 struct bq25700_state {
 145         u8 ac_stat;
 146         u8 ico_done;
 147         u8 in_vindpm;
 148         u8 in_iindpm;
 149         u8 in_fchrg;
 150         u8 in_pchrg;
 151         u8 in_otg;
 152         u8 fault_acov;
 153         u8 fault_batoc;
 154         u8 fault_acoc;
 155         u8 sysovp_stat;
 156         u8 fault_latchoff;
 157         u8 fault_otg_ovp;
 158         u8 fault_otg_ocp;
 159 };
 160
 161 struct bq25700_device {
 162         struct i2c_client                       *client;
 163         struct device                           *dev;
 164         struct power_supply                     *supply_charger;
 165         char                            model_name[I2C_NAME_SIZE];
 166         unsigned int                    irq;
 167         bool                            first_time;
 168         bool                            charger_health_valid;
 169         bool                            battery_health_valid;
 170         bool                            battery_status_valid;
 171
 172         struct workqueue_struct         *usb_charger_wq;
 173         struct workqueue_struct         *dc_charger_wq;
 174         struct workqueue_struct         *finish_sig_wq;
 175         struct delayed_work             usb_work;
 176         struct delayed_work             pd_work;
 177         struct delayed_work             host_work;
 178         struct delayed_work             discnt_work;
 179         struct delayed_work             usb_work1;
 180         struct delayed_work             pd_work1;
 181         struct delayed_work             host_work1;
 182         struct delayed_work             discnt_work1;
 183         struct delayed_work             irq_work;
 184         struct notifier_block           cable_cg_nb;
 185         struct notifier_block           cable_pd_nb;
 186         struct notifier_block           cable_host_nb;
 187         struct notifier_block           cable_discnt_nb;
 188         struct notifier_block           cable_cg_nb1;
 189         struct notifier_block           cable_pd_nb1;
 190         struct notifier_block           cable_host_nb1;
 191         struct notifier_block           cable_discnt_nb1;
 192         struct extcon_dev               *cable_edev;
 193         struct extcon_dev               *cable_edev_1;
 194         int                             typec0_status;
 195         int                             typec1_status;
 196         struct gpio_desc                *typec0_enable_io;
 197         struct gpio_desc                *typec1_enable_io;
 198         struct gpio_desc                *typec0_discharge_io;
 199         struct gpio_desc                *typec1_discharge_io;
 200
 201         struct regmap                   *regmap;
 202         struct regmap_field             *rmap_fields[F_MAX_FIELDS];
 203         int                             chip_id;
 204         struct bq25700_init_data        init_data;
 205         struct bq25700_state            state;
 206         int                             pd_charge_only;
 207 };
 208
 209 static const struct reg_field bq25700_reg_fields[] = {
 210         /*REG12*/
 211         [EN_LWPWR] = REG_FIELD(0x12, 15, 15),
 212         [WDTWR_ADJ] = REG_FIELD(0x12, 13, 14),
 213         [IDPM_AUTO_DISABLE] = REG_FIELD(0x12, 12, 12),
 214         [EN_OOA] = REG_FIELD(0x12, 10, 10),
 215         [PWM_FREQ] = REG_FIELD(0x12, 9, 9),
 216         [EN_LEARN] = REG_FIELD(0x12, 5, 5),
 217         [IADP_GAIN] = REG_FIELD(0x12, 4, 4),
 218         [IBAT_GAIN] = REG_FIELD(0x12, 3, 3),
 219         [EN_LDO] = REG_FIELD(0x12, 2, 2),
 220         [EN_IDPM] = REG_FIELD(0x12, 1, 1),
 221         [CHRG_INHIBIT] = REG_FIELD(0x12, 0, 0),
 222         /*REG0x14*/
 223         [CHARGE_CURRENT] = REG_FIELD(0x14, 6, 12),
 224         /*REG0x15*/
 225         [MAX_CHARGE_VOLTAGE] = REG_FIELD(0x15, 4, 14),
 226         /*REG20*/
 227         [AC_STAT] = REG_FIELD(0x20, 15, 15),
 228         [ICO_DONE] = REG_FIELD(0x20, 14, 14),
 229         [IN_VINDPM] = REG_FIELD(0x20, 12, 12),
 230         [IN_IINDPM] = REG_FIELD(0x20, 11, 11),
 231         [IN_FCHRG] = REG_FIELD(0x20, 10, 10),
 232         [IN_PCHRG] = REG_FIELD(0x20, 9, 9),
 233         [IN_OTG] = REG_FIELD(0x20, 8, 8),
 234         [F_ACOV] = REG_FIELD(0x20, 7, 7),
 235         [F_BATOC] = REG_FIELD(0x20, 6, 6),
 236         [F_ACOC] = REG_FIELD(0x20, 5, 5),
 237         [SYSOVP_STAT] = REG_FIELD(0x20, 4, 4),
 238         [F_LATCHOFF] = REG_FIELD(0x20, 2, 2),
 239         [F_OTG_OVP] = REG_FIELD(0x20, 1, 1),
 240         [F_OTG_OCP] = REG_FIELD(0x20, 0, 0),
 241         /*REG21*/
 242         [STAT_COMP] = REG_FIELD(0x21, 6, 6),
 243         [STAT_ICRIT] = REG_FIELD(0x21, 5, 5),
 244         [STAT_INOM] = REG_FIELD(0x21, 4, 4),
 245         [STAT_IDCHG] = REG_FIELD(0x21, 3, 3),
 246         [STAT_VSYS] = REG_FIELD(0x21, 2, 2),
 247         [STAT_BAT_REMOV] = REG_FIELD(0x21, 1, 1),
 248         [STAT_ADP_REMOV] = REG_FIELD(0x21, 0, 0),
 249         /*REG22*/
 250         [INPUT_CURRENT_DPM] = REG_FIELD(0x22, 8, 14),
 251         /*REG23H*/
 252         [OUTPUT_INPUT_VOL] = REG_FIELD(0x23, 8, 15),
 253         [OUTPUT_SYS_POWER] = REG_FIELD(0x23, 0, 7),
 254         /*REG24H*/
 255         [OUTPUT_DSG_CUR] = REG_FIELD(0x24, 8, 14),
 256         [OUTPUT_CHG_CUR] = REG_FIELD(0x24, 0, 6),
 257         /*REG25H*/
 258         [OUTPUT_INPUT_CUR] = REG_FIELD(0x25, 8, 15),
 259         [OUTPUT_CMPIN_VOL] = REG_FIELD(0x25, 0, 7),
 260         /*REG26H*/
 261         [OUTPUT_SYS_VOL] = REG_FIELD(0x26, 8, 15),
 262         [OUTPUT_BAT_VOL] = REG_FIELD(0x26, 0, 6),
 263
 264         /*REG30*/
 265         [EN_IBAT] = REG_FIELD(0x30, 15, 15),
 266         [EN_PROCHOT_LPWR] = REG_FIELD(0x30, 13, 14),
 267         [EN_PSYS] = REG_FIELD(0x30, 12, 12),
 268         [RSNS_RAC] = REG_FIELD(0x30, 11, 11),
 269         [RSNS_RSR] = REG_FIELD(0x30, 10, 10),
 270         [PSYS_RATIO] = REG_FIELD(0x30, 9, 9),
 271         [CMP_REF] = REG_FIELD(0x30, 7, 7),
 272         [CMP_POL] = REG_FIELD(0x30, 6, 6),
 273         [CMP_DEG] = REG_FIELD(0x30, 4, 5),
 274         [FORCE_LATCHOFF] = REG_FIELD(0x30, 3, 3),
 275         [EN_SHIP_DCHG] = REG_FIELD(0x30, 1, 1),
 276         [AUTO_WAKEUP_EN] = REG_FIELD(0x30, 0, 0),
 277         /*REG31*/
 278         [PKPWR_TOVLD_REG] = REG_FIELD(0x31, 14, 15),
 279         [EN_PKPWR_IDPM] = REG_FIELD(0x31, 13, 13),
 280         [EN_PKPWR_VSYS] = REG_FIELD(0x31, 12, 12),
 281         [PKPWER_OVLD_STAT] = REG_FIELD(0x31, 11, 11),
 282         [PKPWR_RELAX_STAT] = REG_FIELD(0x31, 10, 10),
 283         [PKPWER_TMAX] = REG_FIELD(0x31, 8, 9),
 284         [EN_EXTILIM] = REG_FIELD(0x31, 7, 7),
 285         [EN_ICHG_IDCHG] = REG_FIELD(0x31, 6, 6),
 286         [Q2_OCP] = REG_FIELD(0x31, 5, 5),
 287         [ACX_OCP] = REG_FIELD(0x31, 4, 4),
 288         [EN_ACOC] = REG_FIELD(0x31, 3, 3),
 289         [ACOC_VTH] = REG_FIELD(0x31, 2, 2),
 290         [EN_BATOC] = REG_FIELD(0x31, 1, 1),
 291         [BATCOC_VTH] = REG_FIELD(0x31, 0, 0),
 292         /*REG32*/
 293         [EN_HIZ] = REG_FIELD(0x32, 15, 15),
 294         [RESET_REG] = REG_FIELD(0x32, 14, 14),
 295         [RESET_VINDPM] = REG_FIELD(0x32, 13, 13),
 296         [EN_OTG] = REG_FIELD(0x32, 12, 12),
 297         [EN_ICO_MODE] = REG_FIELD(0x32, 11, 11),
 298         [BATFETOFF_HIZ] = REG_FIELD(0x32, 1, 1),
 299         [PSYS_OTG_IDCHG] = REG_FIELD(0x32, 0, 0),
 300         /*REG33*/
 301         [ILIM2_VTH] = REG_FIELD(0x33, 11, 15),
 302         [ICRIT_DEG] = REG_FIELD(0x33, 9, 10),
 303         [VSYS_VTH] = REG_FIELD(0x33, 6, 7),
 304         [EN_PROCHOT_EXT] = REG_FIELD(0x33, 5, 5),
 305         [PROCHOT_WIDTH] = REG_FIELD(0x33, 3, 4),
 306         [PROCHOT_CLEAR] = REG_FIELD(0x33, 2, 2),
 307         [INOM_DEG] = REG_FIELD(0x33, 1, 1),
 308         /*REG34*/
 309         [IDCHG_VTH] = REG_FIELD(0x34, 10, 15),
 310         [IDCHG_DEG] = REG_FIELD(0x34, 8, 9),
 311         [PROCHOT_PROFILE_COMP] = REG_FIELD(0x34, 6, 6),
 312         [PROCHOT_PROFILE_ICRIT] = REG_FIELD(0x34, 5, 5),
 313         [PROCHOT_PROFILE_INOM] = REG_FIELD(0x34, 4, 4),
 314         [PROCHOT_PROFILE_IDCHG] = REG_FIELD(0x34, 3, 3),
 315         [PROCHOT_PROFILE_VSYS] = REG_FIELD(0x34, 2, 2),
 316         [PROCHOT_PROFILE_BATPRES] = REG_FIELD(0x34, 1, 1),
 317         [PROCHOT_PROFILE_ACOK] = REG_FIELD(0x34, 0, 0),
 318         /*REG35*/
 319         [ADC_CONV] = REG_FIELD(0x35, 15, 15),
 320         [ADC_START] = REG_FIELD(0x35, 14, 14),
 321         [ADC_FULLSCALE] = REG_FIELD(0x35, 13, 13),
 322         [EN_ADC_CMPIN] = REG_FIELD(0x35, 7, 7),
 323         [EN_ADC_VBUS] = REG_FIELD(0x35, 6, 6),
 324         [EN_ADC_PSYS] = REG_FIELD(0x35, 5, 5),
 325         [EN_ADC_IIN] = REG_FIELD(0x35, 4, 4),
 326         [EN_ADC_IDCHG] = REG_FIELD(0x35, 3, 3),
 327         [EN_ADC_ICHG] = REG_FIELD(0x35, 2, 2),
 328         [EN_ADC_VSYS] = REG_FIELD(0x35, 1, 1),
 329         [EN_ADC_VBAT] = REG_FIELD(0x35, 0, 0),
 330         /*REG3B*/
 331         [OTG_VOLTAGE] = REG_FIELD(0x3B, 6, 13),
 332         /*REG3C*/
 333         [OTG_CURRENT] = REG_FIELD(0x3C, 8, 14),
 334         /*REG3D*/
 335         [INPUT_VOLTAGE] = REG_FIELD(0x3D, 6, 13),
 336         /*REG3E*/
 337         [MIN_SYS_VOTAGE] = REG_FIELD(0x3E, 8, 13),
 338         /*REG3F*/
 339         [INPUT_CURRENT] = REG_FIELD(0x3F, 8, 14),
 340
 341         /*REGFE*/
 342         [MANUFACTURE_ID] = REG_FIELD(0xFE, 0, 7),
 343         /*REFFF*/
 344         [DEVICE_ID] = REG_FIELD(0xFF, 0, 7),
 345 };
 346
 347 /*
 348  * Most of the val -> idx conversions can be computed, given the minimum,
 349  * maximum and the step between values. For the rest of conversions, we use
 350  * lookup tables.
 351  */
 352 enum bq25700_table_ids {
 353         /* range tables */
 354         TBL_ICHG,
 355         TBL_CHGMAX,
 356         TBL_INPUTVOL,
 357         TBL_INPUTCUR,
 358         TBL_SYSVMIN,
 359         TBL_OTGVOL,
 360         TBL_OTGCUR,
 361         TBL_EXTCON,
 362 };
 363
 364 struct bq25700_range {
 365         u32 min;
 366         u32 max;
 367         u32 step;
 368 };
 369
 370 struct bq25700_lookup {
 371         const u32 *tbl;
 372         u32 size;
 373 };
 374
 375 static const union {
 376         struct bq25700_range  rt;
 377         struct bq25700_lookup lt;
 378 } bq25700_tables[] = {
 379         /* range tables */
 380         [TBL_ICHG] =    { .rt = {0,       8128000, 64000} },
 381         /* uV */
 382         [TBL_CHGMAX] = { .rt = {0, 19200000, 16000} },
 383         /* uV  max charge voltage*/
 384         [TBL_INPUTVOL] = { .rt = {3200000, 19520000, 64000} },
 385         /* uV  input charge voltage*/
 386         [TBL_INPUTCUR] = {.rt = {0, 6350000, 50000} },
 387         /*uA input current*/
 388         [TBL_SYSVMIN] = { .rt = {1024000, 16182000, 256000} },
 389         /* uV min system voltage*/
 390         [TBL_OTGVOL] = {.rt = {4480000, 20800000, 64000} },
 391         /*uV OTG volage*/
 392         [TBL_OTGCUR] = {.rt = {0, 6350000, 50000} },
 393 };
 394
 395 static const struct regmap_range bq25700_readonly_reg_ranges[] = {
 396         regmap_reg_range(0x20, 0x26),
 397         regmap_reg_range(0xFE, 0xFF),
 398 };
 399
 400 static const struct regmap_access_table bq25700_writeable_regs = {
 401         .no_ranges = bq25700_readonly_reg_ranges,
 402         .n_no_ranges = ARRAY_SIZE(bq25700_readonly_reg_ranges),
 403 };
 404
 405 static const struct regmap_range bq25700_volatile_reg_ranges[] = {
 406         regmap_reg_range(0x12, 0x12),
 407         regmap_reg_range(0x14, 0x15),
 408         regmap_reg_range(0x20, 0x26),
 409         regmap_reg_range(0x30, 0x35),
 410         regmap_reg_range(0x3B, 0x3F),
 411         regmap_reg_range(0xFE, 0xFF),
 412 };
 413
 414 static const struct regmap_access_table bq25700_volatile_regs = {
 415         .yes_ranges = bq25700_volatile_reg_ranges,
 416         .n_yes_ranges = ARRAY_SIZE(bq25700_volatile_reg_ranges),
 417 };
 418
 419 static const struct regmap_config bq25700_regmap_config = {
 420         .reg_bits = 8,
 421         .val_bits = 16,
 422
 423         .max_register = 0xFF,
 424         .cache_type = REGCACHE_RBTREE,
 425
 426         .wr_table = &bq25700_writeable_regs,
 427         .volatile_table = &bq25700_volatile_regs,
 428         .val_format_endian = REGMAP_ENDIAN_LITTLE,
 429 };
 430
 431 static struct bq25700_device *bq25700_charger;
 432
 433 static int bq25700_field_read(struct bq25700_device *charger,
 434                               enum bq25700_fields field_id)
 435 {
 436         int ret;
 437         int val;
 438
 439         ret = regmap_field_read(charger->rmap_fields[field_id], &val);
 440         if (ret < 0)
 441                 return ret;
 442
 443         return val;
 444 }
 445
 446 static int bq25700_field_write(struct bq25700_device *charger,
 447                                enum bq25700_fields field_id, unsigned int val)
 448 {
 449         return regmap_field_write(charger->rmap_fields[field_id], val);
 450 }
 451
 452 static int bq25700_get_chip_state(struct bq25700_device *charger,
 453                                   struct bq25700_state *state)
 454 {
 455         int i, ret;
 456
 457         struct {
 458                 enum bq25700_fields id;
 459                 u8 *data;
 460         } state_fields[] = {
 461                 {AC_STAT,       &state->ac_stat},
 462                 {ICO_DONE,      &state->ico_done},
 463                 {IN_VINDPM,     &state->in_vindpm},
 464                 {IN_IINDPM, &state->in_iindpm},
 465                 {IN_FCHRG,      &state->in_fchrg},
 466                 {IN_PCHRG,      &state->in_pchrg},
 467                 {IN_OTG,        &state->in_otg},
 468                 {F_ACOV,        &state->fault_acov},
 469                 {F_BATOC,       &state->fault_batoc},
 470                 {F_ACOC,        &state->fault_acoc},
 471                 {SYSOVP_STAT,   &state->sysovp_stat},
 472                 {F_LATCHOFF,    &state->fault_latchoff},
 473                 {F_OTG_OVP,     &state->fault_otg_ovp},
 474                 {F_OTG_OCP,     &state->fault_otg_ocp},
 475         };
 476
 477         for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
 478                 ret = bq25700_field_read(charger, state_fields[i].id);
 479                 if (ret < 0)
 480                         return ret;
 481
 482                 *state_fields[i].data = ret;
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int bq25700_dump_regs(struct bq25700_device *charger)
 489 {
 490         u32 val = 0;
 491         struct bq25700_state state;
 492         int ret = 0;
 493
 494         ret = bq25700_field_write(charger, ADC_START, 1);
 495         if (ret < 0) {
 496                 DBG("error: ADC_START\n");
 497                 return ret;
 498         }
 499
 500         DBG("\n==================================\n");
 501         regmap_read(charger->regmap, 0x12, &val);
 502         DBG("REG0x12 : 0x%x\n", val);
 503         regmap_read(charger->regmap, 0x14, &val);
 504         DBG("REG0x14 : 0x%x\n", val);
 505         regmap_read(charger->regmap, 0x15, &val);
 506         DBG("REG0x15 : 0x%x\n", val);
 507         regmap_read(charger->regmap, 0x30, &val);
 508         DBG("REG0x30 : 0x%x\n", val);
 509         regmap_read(charger->regmap, 0x31, &val);
 510         DBG("REG0x31 : 0x%x\n", val);
 511         regmap_read(charger->regmap, 0x32, &val);
 512         DBG("REG0x32 : 0x%x\n", val);
 513         regmap_read(charger->regmap, 0x33, &val);
 514         DBG("REG0x33 : 0x%x\n", val);
 515         regmap_read(charger->regmap, 0x34, &val);
 516         DBG("REG0x34 : 0x%x\n", val);
 517         regmap_read(charger->regmap, 0x35, &val);
 518         DBG("REG0x35 : 0x%x\n", val);
 519         regmap_read(charger->regmap, 0x20, &val);
 520         DBG("REG0x20 : 0x%x\n", val);
 521         regmap_read(charger->regmap, 0x21, &val);
 522         DBG("REG0x21 : 0x%x\n", val);
 523         regmap_read(charger->regmap, 0x22, &val);
 524         DBG("REG0x22 : 0x%x\n", val);
 525         regmap_read(charger->regmap, 0x23, &val);
 526         DBG("REG0x23 : 0x%x\n", val);
 527         regmap_read(charger->regmap, 0x24, &val);
 528         DBG("REG0x24 : 0x%x\n", val);
 529         regmap_read(charger->regmap, 0x25, &val);
 530         DBG("REG0x25 : 0x%x\n", val);
 531         regmap_read(charger->regmap, 0x26, &val);
 532         DBG("REG0x26 : 0x%x\n", val);
 533         regmap_read(charger->regmap, 0x3b, &val);
 534         DBG("REG0x3b : 0x%x\n", val);
 535         regmap_read(charger->regmap, 0x3c, &val);
 536         DBG("REG0x3c : 0x%x\n", val);
 537         regmap_read(charger->regmap, 0x3d, &val);
 538         DBG("REG0x3d : 0x%x\n", val);
 539         regmap_read(charger->regmap, 0x3e, &val);
 540         DBG("REG0x3e : 0x%x\n", val);
 541         regmap_read(charger->regmap, 0x3f, &val);
 542         DBG("REG0x3f : 0x%x\n", val);
 543         regmap_read(charger->regmap, 0xfe, &val);
 544         DBG("REG0xfe : 0x%x\n", val);
 545         regmap_read(charger->regmap, 0xff, &val);
 546         DBG("REG0xff : 0x%x\n", val);
 547
 548         DBG("battery charge current: %dmA\n",
 549             bq25700_field_read(charger, OUTPUT_DSG_CUR) * 64);
 550         DBG("battery discharge current: %dmA\n",
 551             bq25700_field_read(charger, OUTPUT_CHG_CUR) * 256);
 552         DBG("VSYS volatge: %dmV\n",
 553             2880 + bq25700_field_read(charger, OUTPUT_SYS_VOL) * 64);
 554         DBG("BAT volatge: %dmV\n",
 555             2880 + bq25700_field_read(charger, OUTPUT_BAT_VOL) * 64);
 556
 557         DBG("SET CHARGE_CURRENT: %dmA\n",
 558             bq25700_field_read(charger, CHARGE_CURRENT) * 64);
 559         DBG("MAX_CHARGE_VOLTAGE: %dmV\n",
 560             bq25700_field_read(charger, MAX_CHARGE_VOLTAGE) * 16);
 561         DBG("     INPUT_VOLTAGE: %dmV\n",
 562             3200 + bq25700_field_read(charger, INPUT_VOLTAGE) * 64);
 563         DBG("     INPUT_CURRENT: %dmA\n",
 564             bq25700_field_read(charger, INPUT_CURRENT) * 50);
 565         DBG("    MIN_SYS_VOTAGE: %dmV\n",
 566             1024 + bq25700_field_read(charger, MIN_SYS_VOTAGE) * 256);
 567         bq25700_get_chip_state(charger, &state);
 568         DBG("status:\n");
 569         DBG("AC_STAT:  %d\n", state.ac_stat);
 570         DBG("ICO_DONE: %d\n", state.ico_done);
 571         DBG("IN_VINDPM: %d\n", state.in_vindpm);
 572         DBG("IN_IINDPM: %d\n", state.in_iindpm);
 573         DBG("IN_FCHRG: %d\n", state.in_fchrg);
 574         DBG("IN_PCHRG: %d\n", state.in_pchrg);
 575         DBG("IN_OTG: %d\n", state.in_otg);
 576         DBG("F_ACOV: %d\n", state.fault_acov);
 577         DBG("F_BATOC: %d\n", state.fault_batoc);
 578         DBG("F_ACOC: %d\n", state.fault_acoc);
 579         DBG("SYSOVP_STAT: %d\n", state.sysovp_stat);
 580         DBG("F_LATCHOFF: %d\n", state.fault_latchoff);
 581         DBG("F_OTGOVP: %d\n", state.fault_otg_ovp);
 582         DBG("F_OTGOCP: %d\n", state.fault_otg_ocp);
 583
 584         DBG("\n+++++++++++++++++++++++++++++++++++++++++++++++++\n");
 585         return 0;
 586 }
 587
 588 ssize_t bq25700_charge_info_show(struct device *dev,
 589                                  struct device_attribute *attr, char *buf)
 590 {
 591         struct bq25700_device *charger = dev_get_drvdata(dev);
 592
 593         bq25700_dump_regs(charger);
 594
 595         return 0;
 596 }
 597
 598 static struct device_attribute bq25700_charger_attr[] = {
 599         __ATTR(charge_info, 0664, bq25700_charge_info_show, NULL),
 600 };
 601
 602 static void bq25700_init_sysfs(struct bq25700_device *charger)
 603 {
 604         int i, ret;
 605
 606         for (i = 0; i < ARRAY_SIZE(bq25700_charger_attr); i++) {
 607                 ret = sysfs_create_file(&charger->dev->kobj,
 608                                         &bq25700_charger_attr[i].attr);
 609                 if (ret)
 610                         dev_err(charger->dev, "create charger node(%s) error\n",
 611                                 bq25700_charger_attr[i].attr.name);
 612         }
 613 }
 614
 615 static u32 bq25700_find_idx(u32 value, enum bq25700_table_ids id)
 616 {
 617         u32 idx;
 618         u32 rtbl_size;
 619         const struct bq25700_range *rtbl = &bq25700_tables[id].rt;
 620
 621         rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
 622
 623         for (idx = 1;
 624              idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
 625              idx++)
 626                 ;
 627
 628         return idx - 1;
 629 }
 630
 631 void bq25700_charger_set_current(unsigned long event,
 632                                  int current_value)
 633 {
 634         int idx;
 635
 636         if (!bq25700_charger) {
 637                 pr_err("[%s,%d] bq25700_charger is null\n", __func__, __LINE__);
 638                 return;
 639         }
 640         switch (event) {
 641         case CHARGER_CURRENT_EVENT:
 642                 idx = bq25700_find_idx(current_value, TBL_ICHG);
 643                 bq25700_field_write(bq25700_charger, CHARGE_CURRENT, idx);
 644                 break;
 645
 646         case INPUT_CURRENT_EVENT:
 647                 idx = bq25700_find_idx(current_value, TBL_INPUTCUR);
 648                 bq25700_field_write(bq25700_charger, INPUT_CURRENT, idx);
 649                 break;
 650
 651         default:
 652                 return;
 653         }
 654 }
 655
 656 static int bq25700_fw_read_u32_props(struct bq25700_device *charger)
 657 {
 658         int ret;
 659         u32 property;
 660         int i;
 661         struct bq25700_init_data *init = &charger->init_data;
 662         struct {
 663                 char *name;
 664                 bool optional;
 665                 enum bq25700_table_ids tbl_id;
 666                 u32 *conv_data; /* holds converted value from given property */
 667         } props[] = {
 668                 /* required properties */
 669                 {"ti,charge-current", false, TBL_ICHG,
 670                  &init->ichg},
 671                 {"ti,max-charge-voltage", false, TBL_CHGMAX,
 672                  &init->max_chg_vol},
 673                 {"ti,input-current-sdp", false, TBL_INPUTCUR,
 674                  &init->input_current_sdp},
 675                 {"ti,input-current-dcp", false, TBL_INPUTCUR,
 676                  &init->input_current_dcp},
 677                 {"ti,input-current-cdp", false, TBL_INPUTCUR,
 678                  &init->input_current_cdp},
 679                 {"ti,minimum-sys-voltage", false, TBL_SYSVMIN,
 680                  &init->sys_min_voltage},
 681                 {"ti,otg-voltage", false, TBL_OTGVOL,
 682                  &init->otg_voltage},
 683                 {"ti,otg-current", false, TBL_OTGCUR,
 684                  &init->otg_current},
 685         };
 686
 687         /* initialize data for optional properties */
 688         for (i = 0; i < ARRAY_SIZE(props); i++) {
 689                 ret = device_property_read_u32(charger->dev, props[i].name,
 690                                                &property);
 691                 if (ret < 0) {
 692                         if (props[i].optional)
 693                                 continue;
 694
 695                         return ret;
 696                 }
 697
 698                 if ((props[i].tbl_id == TBL_ICHG) &&
 699                     (property > MAX_CHARGECURRETNT)) {
 700                         dev_err(charger->dev, "ti,charge-current is error\n");
 701                         return -ENODEV;
 702                 }
 703                 if ((props[i].tbl_id == TBL_CHGMAX) &&
 704                     (property > MAX_CHARGEVOLTAGE)) {
 705                         dev_err(charger->dev, "ti,max-charge-voltage is error\n");
 706                         return -ENODEV;
 707                 }
 708                 if ((props[i].tbl_id == TBL_INPUTCUR) &&
 709                     (property > MAX_INPUTCURRENT)) {
 710                         dev_err(charger->dev, "ti,input-current is error\n");
 711                         return -ENODEV;
 712                 }
 713                 if ((props[i].tbl_id == TBL_OTGVOL) &&
 714                     (property > MAX_OTGVOLTAGE)) {
 715                         dev_err(charger->dev, "ti,ti,otg-voltage is error\n");
 716                         return -ENODEV;
 717                 }
 718                 if ((props[i].tbl_id == TBL_OTGVOL) &&
 719                     (property > MAX_OTGCURRENT)) {
 720                         dev_err(charger->dev, "ti,otg-current is error\n");
 721                         return -ENODEV;
 722                 }
 723
 724                 *props[i].conv_data = bq25700_find_idx(property,
 725                                                        props[i].tbl_id);
 726                 DBG("%s, val: %d, tbl_id =%d\n", props[i].name, property,
 727                     *props[i].conv_data);
 728         }
 729
 730         return 0;
 731 }
 732
 733 static int bq25700_chip_reset(struct bq25700_device *charger)
 734 {
 735         int ret;
 736         int rst_check_counter = 10;
 737
 738         ret = bq25700_field_write(charger, RESET_REG, 1);
 739         if (ret < 0)
 740                 return ret;
 741
 742         do {
 743                 ret = bq25700_field_read(charger, RESET_REG);
 744                 if (ret < 0)
 745                         return ret;
 746
 747                 mdelay(4);
 748         } while (ret == 1 && --rst_check_counter);
 749
 750         if (!rst_check_counter)
 751                 return -ETIMEDOUT;
 752
 753         return 0;
 754 }
 755
 756 static int bq25700_hw_init(struct bq25700_device *charger)
 757 {
 758         int ret;
 759         int i;
 760         struct bq25700_state state;
 761
 762         const struct {
 763                 enum bq25700_fields id;
 764                 u32 value;
 765         } init_data[] = {
 766                 {CHARGE_CURRENT,         charger->init_data.ichg},
 767                 {MAX_CHARGE_VOLTAGE,     charger->init_data.max_chg_vol},
 768                 {INPUT_CURRENT,  charger->init_data.input_current},
 769                 {MIN_SYS_VOTAGE,         charger->init_data.sys_min_voltage},
 770                 {OTG_VOLTAGE,    charger->init_data.otg_voltage},
 771                 {OTG_CURRENT,    charger->init_data.otg_current},
 772         };
 773
 774         ret = bq25700_chip_reset(charger);
 775         if (ret < 0)
 776                 return ret;
 777
 778         /* disable watchdog */
 779         ret = bq25700_field_write(charger, WDTWR_ADJ, 0);
 780         if (ret < 0)
 781                 return ret;
 782
 783         /* initialize currents/voltages and other parameters */
 784         for (i = 0; i < ARRAY_SIZE(init_data); i++) {
 785                 ret = bq25700_field_write(charger, init_data[i].id,
 786                                           init_data[i].value);
 787                 if (ret < 0)
 788                         return ret;
 789         }
 790
 791         DBG("    CHARGE_CURRENT: %dmA\n",
 792             bq25700_field_read(charger, CHARGE_CURRENT) * 64);
 793         DBG("MAX_CHARGE_VOLTAGE: %dmV\n",
 794             bq25700_field_read(charger, MAX_CHARGE_VOLTAGE) * 16);
 795         DBG("     INPUT_VOLTAGE: %dmV\n",
 796             3200 + bq25700_field_read(charger, INPUT_VOLTAGE) * 64);
 797         DBG("     INPUT_CURRENT: %dmA\n",
 798             bq25700_field_read(charger, INPUT_CURRENT) * 50);
 799         DBG("    MIN_SYS_VOTAGE: %dmV\n",
 800             1024 + bq25700_field_read(charger, MIN_SYS_VOTAGE) * 256);
 801
 802         /* Configure ADC for continuous conversions. This does not enable it. */
 803
 804         ret = bq25700_field_write(charger, EN_LWPWR, 0);
 805         if (ret < 0) {
 806                 DBG("error: EN_LWPWR\n");
 807                 return ret;
 808         }
 809
 810         ret = bq25700_field_write(charger, ADC_CONV, 1);
 811         if (ret < 0) {
 812                 DBG("error: ADC_CONV\n");
 813                 return ret;
 814         }
 815
 816         ret = bq25700_field_write(charger, ADC_START, 1);
 817         if (ret < 0) {
 818                 DBG("error: ADC_START\n");
 819                 return ret;
 820         }
 821
 822         ret = bq25700_field_write(charger, ADC_FULLSCALE, 1);
 823         if (ret < 0) {
 824                 DBG("error: ADC_FULLSCALE\n");
 825                 return ret;
 826         }
 827
 828         ret = bq25700_field_write(charger, EN_ADC_CMPIN, 1);
 829         if (ret < 0) {
 830                 DBG("error: EN_ADC_CMPIN\n");
 831                 return ret;
 832         }
 833
 834         ret = bq25700_field_write(charger, EN_ADC_VBUS, 1);
 835         if (ret < 0) {
 836                 DBG("error: EN_ADC_VBUS\n");
 837                 return ret;
 838         }
 839
 840         ret = bq25700_field_write(charger, EN_ADC_PSYS, 1);
 841         if (ret < 0) {
 842                 DBG("error: EN_ADC_PSYS\n");
 843                 return ret;
 844         }
 845
 846         ret = bq25700_field_write(charger, EN_ADC_IIN, 1);
 847         if (ret < 0) {
 848                 DBG("error: EN_ADC_IIN\n");
 849                 return ret;
 850         }
 851
 852         ret = bq25700_field_write(charger, EN_ADC_IDCHG, 1);
 853         if (ret < 0) {
 854                 DBG("error: EN_ADC_IDCHG\n");
 855                 return ret;
 856         }
 857
 858         ret = bq25700_field_write(charger, EN_ADC_ICHG, 1);
 859         if (ret < 0) {
 860                 DBG("error: EN_ADC_ICHG\n");
 861                 return ret;
 862         }
 863
 864         ret = bq25700_field_write(charger, EN_ADC_VSYS, 1);
 865         if (ret < 0) {
 866                 DBG("error: EN_ADC_VSYS\n");
 867                 return ret;
 868         }
 869
 870         ret = bq25700_field_write(charger, EN_ADC_VBAT, 1);
 871         if (ret < 0) {
 872                 DBG("error: EN_ADC_VBAT\n");
 873                 return ret;
 874         }
 875
 876         bq25700_get_chip_state(charger, &state);
 877         charger->state = state;
 878
 879         return 0;
 880 }
 881
 882 static int bq25700_fw_probe(struct bq25700_device *charger)
 883 {
 884         int ret;
 885
 886         ret = bq25700_fw_read_u32_props(charger);
 887         if (ret < 0)
 888                 return ret;
 889
 890         return 0;
 891 }
 892
 893 static void bq25700_enable_charger(struct bq25700_device *charger,
 894                                    u32 input_current)
 895 {
 896         bq25700_field_write(charger, INPUT_CURRENT, input_current);
 897         bq25700_field_write(charger, CHARGE_CURRENT, charger->init_data.ichg);
 898 }
 899
 900 static enum power_supply_property bq25700_power_supply_props[] = {
 901         POWER_SUPPLY_PROP_MANUFACTURER,
 902         POWER_SUPPLY_PROP_STATUS,
 903         POWER_SUPPLY_PROP_ONLINE,
 904         POWER_SUPPLY_PROP_HEALTH,
 905         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
 906         POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
 907         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 908         POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
 909         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 910         POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
 911 };
 912
 913 static int bq25700_power_supply_get_property(struct power_supply *psy,
 914                                              enum power_supply_property psp,
 915                                              union power_supply_propval *val)
 916 {
 917         int ret;
 918         struct bq25700_device *bq = power_supply_get_drvdata(psy);
 919         struct bq25700_state state;
 920
 921         state = bq->state;
 922
 923         switch (psp) {
 924         case POWER_SUPPLY_PROP_STATUS:
 925                 if (!state.ac_stat)
 926                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 927                 else if (state.in_fchrg == 1 ||
 928                          state.in_pchrg == 1)
 929                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
 930                 else
 931                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 932                 break;
 933
 934         case POWER_SUPPLY_PROP_MANUFACTURER:
 935                 val->strval = BQ25700_MANUFACTURER;
 936                 break;
 937
 938         case POWER_SUPPLY_PROP_ONLINE:
 939                 val->intval = state.ac_stat;
 940                 break;
 941
 942         case POWER_SUPPLY_PROP_HEALTH:
 943                 if (!state.fault_acoc &&
 944                     !state.fault_acov && !state.fault_batoc)
 945                         val->intval = POWER_SUPPLY_HEALTH_GOOD;
 946                 else if (state.fault_batoc)
 947                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 948                 break;
 949
 950         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
 951                 /* read measured value */
 952                 ret = bq25700_field_read(bq, OUTPUT_CHG_CUR);
 953                 if (ret < 0)
 954                         return ret;
 955
 956                 /* converted_val = ADC_val * 64mA  */
 957                 val->intval = ret * 64000;
 958                 break;
 959
 960         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
 961                 val->intval = bq25700_tables[TBL_ICHG].rt.max;
 962                 break;
 963
 964         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 965                 if (!state.ac_stat) {
 966                         val->intval = 0;
 967                         break;
 968                 }
 969
 970                 /* read measured value */
 971                 ret = bq25700_field_read(bq, OUTPUT_BAT_VOL);
 972                 if (ret < 0)
 973                         return ret;
 974
 975                 /* converted_val = 2.88V + ADC_val * 64mV */
 976                 val->intval = 2880000 + ret * 64000;
 977                 break;
 978
 979         case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 980                 val->intval = bq25700_tables[TBL_CHGMAX].rt.max;
 981                 break;
 982
 983         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
 984                 val->intval = bq25700_tables[TBL_INPUTVOL].rt.max;
 985                 break;
 986
 987         case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
 988                 val->intval = bq25700_tables[TBL_INPUTCUR].rt.max;
 989                 break;
 990
 991         default:
 992                 return -EINVAL;
 993         }
 994
 995         return 0;
 996 }
 997
 998 static char *bq25700_charger_supplied_to[] = {
 999         "charger",
1000 };
1001
1002 static const struct power_supply_desc bq25700_power_supply_desc = {
1003         .name = "bq25700-charger",
1004         .type = POWER_SUPPLY_TYPE_USB,
1005         .properties = bq25700_power_supply_props,
1006         .num_properties = ARRAY_SIZE(bq25700_power_supply_props),
1007         .get_property = bq25700_power_supply_get_property,
1008 };
1009
1010 static int bq25700_power_supply_init(struct bq25700_device *charger)
1011 {
1012         struct power_supply_config psy_cfg = { .drv_data = charger, };
1013
1014         psy_cfg.supplied_to = bq25700_charger_supplied_to;
1015         psy_cfg.num_supplicants = ARRAY_SIZE(bq25700_charger_supplied_to);
1016
1017         charger->supply_charger =
1018                 power_supply_register(charger->dev,
1019                                       &bq25700_power_supply_desc,
1020                                       &psy_cfg);
1021
1022         return PTR_ERR_OR_ZERO(charger->supply_charger);
1023 }
1024
1025 static irqreturn_t bq25700_irq_handler_thread(int irq, void *private)
1026 {
1027         struct bq25700_device *charger = private;
1028         int irq_flag;
1029
1030         if (bq25700_field_read(charger, AC_STAT)) {
1031                 irq_flag = IRQF_TRIGGER_LOW;
1032         } else {
1033                 irq_flag = IRQF_TRIGGER_HIGH;
1034                 bq25700_field_write(charger, INPUT_CURRENT,
1035                                     charger->init_data.input_current_sdp);
1036         }
1037         irq_set_irq_type(irq, irq_flag | IRQF_ONESHOT);
1038         rk_send_wakeup_key();
1039
1040         return IRQ_HANDLED;
1041 }
1042
1043 static void bq25700_enable_typec0(struct bq25700_device *charger)
1044 {
1045         if (!IS_ERR_OR_NULL(charger->typec0_enable_io))
1046                 gpiod_direction_output(charger->typec0_enable_io, 1);
1047         if (!IS_ERR_OR_NULL(charger->typec1_enable_io))
1048                 gpiod_direction_output(charger->typec1_enable_io, 0);
1049 }
1050
1051 static void bq25700_enable_typec1(struct bq25700_device *charger)
1052 {
1053         if (!IS_ERR_OR_NULL(charger->typec0_enable_io))
1054                 gpiod_direction_output(charger->typec0_enable_io, 0);
1055         if (!IS_ERR_OR_NULL(charger->typec1_enable_io))
1056                 gpiod_direction_output(charger->typec1_enable_io, 1);
1057 }
1058
1059 static void bq25700_disable_charge(struct bq25700_device *charger)
1060 {
1061         if (!IS_ERR_OR_NULL(charger->typec0_enable_io))
1062                 gpiod_direction_output(charger->typec0_enable_io, 0);
1063         if (!IS_ERR_OR_NULL(charger->typec1_enable_io))
1064                 gpiod_direction_output(charger->typec1_enable_io, 0);
1065 }
1066
1067 static void bq25700_typec0_discharge(struct bq25700_device *charger)
1068 {
1069         if (!IS_ERR_OR_NULL(charger->typec0_discharge_io))
1070                 gpiod_direction_output(charger->typec0_discharge_io, 1);
1071         msleep(20);
1072         if (!IS_ERR_OR_NULL(charger->typec0_discharge_io))
1073                 gpiod_direction_output(charger->typec0_discharge_io, 0);
1074 }
1075
1076 static void bq25700_typec1_discharge(struct bq25700_device *charger)
1077 {
1078         if (!IS_ERR_OR_NULL(charger->typec1_discharge_io))
1079                 gpiod_direction_output(charger->typec1_discharge_io, 1);
1080         msleep(20);
1081         if (!IS_ERR_OR_NULL(charger->typec1_discharge_io))
1082                 gpiod_direction_output(charger->typec1_discharge_io, 0);
1083 }
1084
1085 static void bq25700_pd_connect(struct bq25700_device *charger,
1086                                struct extcon_dev *edev,
1087                                enum tpyec_port_t port)
1088 {
1089         union extcon_property_value prop_val;
1090         struct bq25700_state state;
1091         int ret;
1092         int vol, cur;
1093         int vol_idx, cur_idx;
1094         int i;
1095
1096         if (charger->typec0_status == USB_STATUS_PD ||
1097             charger->typec1_status == USB_STATUS_PD)
1098                 return;
1099
1100         if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_FAST) > 0) {
1101                 ret = extcon_get_property(edev, EXTCON_CHG_USB_FAST,
1102                                           EXTCON_PROP_USB_TYPEC_POLARITY,
1103                                           &prop_val);
1104                 DBG("usb pd charge...\n");
1105                 vol = prop_val.intval & 0xffff;
1106                 cur = prop_val.intval >> 15;
1107                 if (ret == 0) {
1108                         if (port == USB_TYPEC_0) {
1109                                 charger->typec0_status = USB_STATUS_PD;
1110                                 bq25700_enable_typec0(charger);
1111                         } else {
1112                                 charger->typec1_status = USB_STATUS_PD;
1113                                 bq25700_enable_typec1(charger);
1114                         }
1115
1116                         i = 0;
1117                         while (!bq25700_field_read(charger, AC_STAT) && i < 5) {
1118                                 msleep(1000);
1119                                 i++;
1120                         }
1121                         vol_idx = bq25700_find_idx((vol - 1280) * 1000,
1122                                                    TBL_INPUTVOL);
1123                         cur_idx = bq25700_find_idx(cur * 1000, TBL_INPUTCUR);
1124                         bq25700_field_write(charger, INPUT_VOLTAGE, vol_idx);
1125                         bq25700_field_write(charger, INPUT_CURRENT, cur_idx);
1126                         bq25700_field_write(charger, CHARGE_CURRENT,
1127                                             charger->init_data.ichg);
1128                 }
1129
1130                 bq25700_get_chip_state(charger, &state);
1131                 charger->state = state;
1132                 power_supply_changed(charger->supply_charger);
1133         }
1134 }
1135
1136 static void bq25700_pd_evt_worker(struct work_struct *work)
1137 {
1138         struct bq25700_device *charger = container_of(work,
1139                                 struct bq25700_device, pd_work.work);
1140         struct extcon_dev *edev = charger->cable_edev;
1141
1142         bq25700_pd_connect(charger, edev, USB_TYPEC_0);
1143 }
1144
1145 static void bq25700_pd_evt_worker1(struct work_struct *work)
1146 {
1147         struct bq25700_device *charger = container_of(work,
1148                                 struct bq25700_device, pd_work1.work);
1149         struct extcon_dev *edev = charger->cable_edev_1;
1150
1151         bq25700_pd_connect(charger, edev, USB_TYPEC_1);
1152 }
1153
1154 static int bq25700_pd_evt_notifier(struct notifier_block *nb,
1155                                    unsigned long event,
1156                                    void *ptr)
1157 {
1158         struct bq25700_device *charger =
1159                 container_of(nb, struct bq25700_device, cable_pd_nb);
1160
1161         queue_delayed_work(charger->usb_charger_wq, &charger->pd_work,
1162                            msecs_to_jiffies(10));
1163
1164         return NOTIFY_DONE;
1165 }
1166
1167 static int bq25700_pd_evt_notifier1(struct notifier_block *nb,
1168                                     unsigned long event,
1169                                     void *ptr)
1170 {
1171         struct bq25700_device *charger =
1172                 container_of(nb, struct bq25700_device, cable_pd_nb1);
1173
1174         queue_delayed_work(charger->usb_charger_wq, &charger->pd_work1,
1175                            msecs_to_jiffies(10));
1176
1177         return NOTIFY_DONE;
1178 }
1179
1180 static void bq25700_charger_evt_handel(struct bq25700_device *charger,
1181                                        struct extcon_dev *edev,
1182                                        enum tpyec_port_t port)
1183 {
1184         struct bq25700_state state;
1185         enum charger_t charger_state = USB_TYPE_UNKNOWN_CHARGER;
1186
1187         if (charger->typec0_status == USB_STATUS_PD ||
1188             charger->typec1_status == USB_STATUS_PD)
1189                 return;
1190
1191         /* Determine cable/charger type */
1192         if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_SDP) > 0) {
1193                 charger_state = USB_TYPE_USB_CHARGER;
1194
1195                 bq25700_enable_charger(charger,
1196                                        charger->init_data.input_current_sdp);
1197                 DBG("USB_TYPE_USB_CHARGER\n");
1198         } else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_DCP) > 0) {
1199                 charger_state = USB_TYPE_AC_CHARGER;
1200                 bq25700_enable_charger(charger,
1201                                        charger->init_data.input_current_dcp);
1202                 DBG("USB_TYPE_AC_CHARGER\n");
1203         } else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_CDP) > 0) {
1204                 charger_state = USB_TYPE_CDP_CHARGER;
1205                 bq25700_enable_charger(charger,
1206                                        charger->init_data.input_current_cdp);
1207                 DBG("USB_TYPE_CDP_CHARGER\n");
1208         }
1209         if (port == USB_TYPEC_0) {
1210                 if (charger_state == USB_TYPE_USB_CHARGER)
1211                         charger->typec0_status = USB_STATUS_USB;
1212                 else
1213                         charger->typec0_status = USB_STATUS_AC;
1214                 bq25700_enable_typec0(charger);
1215         } else {
1216                 if (charger_state == USB_TYPE_USB_CHARGER)
1217                         charger->typec1_status = USB_STATUS_USB;
1218                 else
1219                         charger->typec1_status = USB_STATUS_AC;
1220                 bq25700_enable_typec1(charger);
1221         }
1222
1223         bq25700_get_chip_state(charger, &state);
1224         charger->state = state;
1225         power_supply_changed(charger->supply_charger);
1226 }
1227
1228 static void bq25700_charger_evt_worker(struct work_struct *work)
1229 {
1230         struct bq25700_device *charger = container_of(work,
1231                                 struct bq25700_device, usb_work.work);
1232         struct extcon_dev *edev = charger->cable_edev;
1233
1234         bq25700_charger_evt_handel(charger, edev, USB_TYPEC_0);
1235 }
1236
1237 static void bq25700_charger_evt_worker1(struct work_struct *work)
1238 {
1239         struct bq25700_device *charger = container_of(work,
1240                                 struct bq25700_device, usb_work1.work);
1241         struct extcon_dev *edev = charger->cable_edev_1;
1242
1243         bq25700_charger_evt_handel(charger, edev, USB_TYPEC_1);
1244 }
1245
1246 static int bq25700_charger_evt_notifier(struct notifier_block *nb,
1247                                         unsigned long event,
1248                                         void *ptr)
1249 {
1250         struct bq25700_device *charger =
1251                 container_of(nb, struct bq25700_device, cable_cg_nb);
1252
1253         queue_delayed_work(charger->usb_charger_wq, &charger->usb_work,
1254                            msecs_to_jiffies(10));
1255
1256         return NOTIFY_DONE;
1257 }
1258
1259 static int bq25700_charger_evt_notifier1(struct notifier_block *nb,
1260                                          unsigned long event,
1261                                          void *ptr)
1262 {
1263         struct bq25700_device *charger =
1264                 container_of(nb, struct bq25700_device, cable_cg_nb1);
1265
1266         queue_delayed_work(charger->usb_charger_wq, &charger->usb_work1,
1267                            msecs_to_jiffies(10));
1268
1269         return NOTIFY_DONE;
1270 }
1271
1272 static void bq25700_host_evt_worker(struct work_struct *work)
1273 {
1274         struct bq25700_device *charger =
1275                 container_of(work, struct bq25700_device, host_work.work);
1276         struct extcon_dev *edev = charger->cable_edev;
1277
1278         /* Determine cable/charger type */
1279         if (extcon_get_cable_state_(edev, EXTCON_USB_VBUS_EN) > 0) {
1280                 bq25700_field_write(charger, EN_OTG, 1);
1281                 DBG("OTG enable\n");
1282         } else if (extcon_get_cable_state_(edev, EXTCON_USB_VBUS_EN) == 0) {
1283                 bq25700_field_write(charger, EN_OTG, 0);
1284                 DBG("OTG disable\n");
1285         }
1286 }
1287
1288 static void bq25700_host_evt_worker1(struct work_struct *work)
1289 {
1290         struct bq25700_device *charger =
1291                 container_of(work, struct bq25700_device, host_work1.work);
1292         struct extcon_dev *edev = charger->cable_edev_1;
1293
1294         /* Determine cable/charger type */
1295         if (extcon_get_cable_state_(edev, EXTCON_USB_VBUS_EN) > 0) {
1296                 bq25700_field_write(charger, EN_OTG, 1);
1297                 DBG("OTG enable\n");
1298         } else if (extcon_get_cable_state_(edev, EXTCON_USB_VBUS_EN) == 0) {
1299                 bq25700_field_write(charger, EN_OTG, 0);
1300                 DBG("OTG disable\n");
1301         }
1302 }
1303
1304 static int bq25700_host_evt_notifier(struct notifier_block *nb,
1305                                      unsigned long event, void *ptr)
1306 {
1307         struct bq25700_device *charger =
1308                 container_of(nb, struct bq25700_device, cable_host_nb);
1309
1310         queue_delayed_work(charger->usb_charger_wq, &charger->host_work,
1311                            msecs_to_jiffies(10));
1312
1313         return NOTIFY_DONE;
1314 }
1315
1316 static int bq25700_host_evt_notifier1(struct notifier_block *nb,
1317                                       unsigned long event, void *ptr)
1318 {
1319         struct bq25700_device *charger =
1320                 container_of(nb, struct bq25700_device, cable_host_nb1);
1321
1322         queue_delayed_work(charger->usb_charger_wq, &charger->host_work1,
1323                            msecs_to_jiffies(10));
1324
1325         return NOTIFY_DONE;
1326 }
1327
1328 static void bq25700_discnt(struct bq25700_device *charger,
1329                            enum tpyec_port_t port)
1330 {
1331         int vol_idx;
1332         struct bq25700_state state;
1333
1334         if (bq25700_field_read(charger, AC_STAT) == 0) {
1335                 bq25700_disable_charge(charger);
1336                 if (port == USB_TYPEC_0) {
1337                         bq25700_typec0_discharge(charger);
1338                         charger->typec0_status = USB_STATUS_NONE;
1339                 } else {
1340                         bq25700_typec1_discharge(charger);
1341                         charger->typec1_status = USB_STATUS_NONE;
1342                 }
1343
1344                 vol_idx = bq25700_find_idx(DEFAULT_INPUTVOL, TBL_INPUTVOL);
1345                 bq25700_field_write(charger, INPUT_VOLTAGE, vol_idx);
1346                 bq25700_field_write(charger, INPUT_CURRENT,
1347                                     charger->init_data.input_current_sdp);
1348                 bq25700_get_chip_state(charger, &state);
1349                 charger->state = state;
1350                 power_supply_changed(charger->supply_charger);
1351         }
1352 }
1353
1354 static void bq25700_discnt_evt_worker(struct work_struct *work)
1355 {
1356         struct bq25700_device *charger = container_of(work,
1357                                                       struct bq25700_device,
1358                                                       discnt_work.work);
1359
1360         bq25700_discnt(charger, USB_TYPEC_0);
1361 }
1362
1363 static void bq25700_discnt_evt_worker1(struct work_struct *work)
1364 {
1365         struct bq25700_device *charger = container_of(work,
1366                                                       struct bq25700_device,
1367                                                       discnt_work1.work);
1368         bq25700_discnt(charger, USB_TYPEC_1);
1369 }
1370
1371 static int bq25700_discnt_evt_notfier(struct notifier_block *nb,
1372                                       unsigned long event,
1373                                       void *ptr)
1374 {
1375         struct bq25700_device *charger =
1376                 container_of(nb, struct bq25700_device, cable_discnt_nb);
1377
1378         queue_delayed_work(charger->usb_charger_wq,
1379                            &charger->discnt_work,
1380                            msecs_to_jiffies(0));
1381
1382         return NOTIFY_DONE;
1383 }
1384
1385 static int bq25700_discnt_evt_notfier1(struct notifier_block *nb,
1386                                        unsigned long event,
1387                                        void *ptr)
1388 {
1389         struct bq25700_device *charger =
1390                 container_of(nb, struct bq25700_device, cable_discnt_nb1);
1391
1392         queue_delayed_work(charger->usb_charger_wq,
1393                            &charger->discnt_work1,
1394                            msecs_to_jiffies(0));
1395
1396         return NOTIFY_DONE;
1397 }
1398
1399 static int bq25700_register_cg_extcon(struct bq25700_device *charger,
1400                                       struct extcon_dev *edev,
1401                                       struct notifier_block *able_cg_nb)
1402 {
1403         int ret;
1404
1405         ret = extcon_register_notifier(edev,
1406                                        EXTCON_CHG_USB_SDP,
1407                                        able_cg_nb);
1408         if (ret < 0) {
1409                 dev_err(charger->dev, "failed to register notifier for SDP\n");
1410                 return -1;
1411         }
1412
1413         ret = extcon_register_notifier(edev,
1414                                        EXTCON_CHG_USB_DCP,
1415                                        able_cg_nb);
1416         if (ret < 0) {
1417                 dev_err(charger->dev, "failed to register notifier for DCP\n");
1418                 return -1;
1419         }
1420
1421         ret = extcon_register_notifier(edev,
1422                                        EXTCON_CHG_USB_CDP,
1423                                        able_cg_nb);
1424         if (ret < 0) {
1425                 dev_err(charger->dev, "failed to register notifier for CDP\n");
1426                 return -1;
1427         }
1428
1429         return 0;
1430 }
1431
1432 static int bq25700_register_cg_nb(struct bq25700_device *charger)
1433 {
1434         if (charger->cable_edev) {
1435                 /* Register chargers  */
1436                 INIT_DELAYED_WORK(&charger->usb_work,
1437                                   bq25700_charger_evt_worker);
1438                 charger->cable_cg_nb.notifier_call =
1439                         bq25700_charger_evt_notifier;
1440                 bq25700_register_cg_extcon(charger, charger->cable_edev,
1441                                            &charger->cable_cg_nb);
1442         }
1443
1444         if (charger->cable_edev_1) {
1445                 INIT_DELAYED_WORK(&charger->usb_work1,
1446                                   bq25700_charger_evt_worker1);
1447                 charger->cable_cg_nb1.notifier_call =
1448                         bq25700_charger_evt_notifier1;
1449                 bq25700_register_cg_extcon(charger, charger->cable_edev_1,
1450                                            &charger->cable_cg_nb1);
1451         }
1452
1453         return 0;
1454 }
1455
1456 static int bq25700_register_discnt_nb(struct bq25700_device *charger)
1457 {
1458         int ret;
1459
1460         /* Register discnt usb */
1461         if (charger->cable_edev) {
1462                 INIT_DELAYED_WORK(&charger->discnt_work,
1463                                   bq25700_discnt_evt_worker);
1464                 charger->cable_discnt_nb.notifier_call =
1465                         bq25700_discnt_evt_notfier;
1466                 ret = extcon_register_notifier(charger->cable_edev,
1467                                                EXTCON_USB,
1468                                                &charger->cable_discnt_nb);
1469                 if (ret < 0) {
1470                         dev_err(charger->dev,
1471                                 "failed to register notifier for HOST\n");
1472                         return ret;
1473                 }
1474         }
1475
1476         if (charger->cable_edev_1) {
1477                 INIT_DELAYED_WORK(&charger->discnt_work1,
1478                                   bq25700_discnt_evt_worker1);
1479                 charger->cable_discnt_nb1.notifier_call =
1480                         bq25700_discnt_evt_notfier1;
1481                 ret = extcon_register_notifier(charger->cable_edev_1,
1482                                                EXTCON_USB,
1483                                                &charger->cable_discnt_nb1);
1484                 if (ret < 0) {
1485                         dev_err(charger->dev,
1486                                 "failed to register notifier for HOST\n");
1487                         return ret;
1488                 }
1489         }
1490
1491         return 0;
1492 }
1493
1494 static int bq25700_register_pd_nb(struct bq25700_device *charger)
1495 {
1496         if (charger->cable_edev) {
1497                 INIT_DELAYED_WORK(&charger->pd_work, bq25700_pd_evt_worker);
1498                 charger->cable_pd_nb.notifier_call = bq25700_pd_evt_notifier;
1499                 extcon_register_notifier(charger->cable_edev,
1500                                          EXTCON_CHG_USB_FAST,
1501                                          &charger->cable_pd_nb);
1502         }
1503
1504         if (charger->cable_edev_1) {
1505                 INIT_DELAYED_WORK(&charger->pd_work1, bq25700_pd_evt_worker1);
1506                 charger->cable_pd_nb1.notifier_call = bq25700_pd_evt_notifier1;
1507                 extcon_register_notifier(charger->cable_edev_1,
1508                                          EXTCON_CHG_USB_FAST,
1509                                          &charger->cable_pd_nb1);
1510         }
1511
1512         return 0;
1513 }
1514
1515 static int bq25700_register_host_nb(struct bq25700_device *charger)
1516 {
1517         int ret;
1518
1519         /* Register host */
1520         if (charger->cable_edev) {
1521                 INIT_DELAYED_WORK(&charger->host_work, bq25700_host_evt_worker);
1522                 charger->cable_host_nb.notifier_call =
1523                         bq25700_host_evt_notifier;
1524                 ret = extcon_register_notifier(charger->cable_edev,
1525                                                EXTCON_USB_HOST,
1526                                                &charger->cable_host_nb);
1527                 if (ret < 0) {
1528                         dev_err(charger->dev,
1529                                 "failed to register notifier for HOST\n");
1530                         return -1;
1531                 }
1532         }
1533
1534         if (charger->cable_edev_1) {
1535                 INIT_DELAYED_WORK(&charger->host_work1,
1536                                   bq25700_host_evt_worker1);
1537                 charger->cable_host_nb1.notifier_call =
1538                         bq25700_host_evt_notifier1;
1539                 ret = extcon_register_notifier(charger->cable_edev_1,
1540                                                EXTCON_USB_HOST,
1541                                                &charger->cable_host_nb1);
1542                 if (ret < 0) {
1543                         dev_err(charger->dev,
1544                                 "failed to register notifier for HOST\n");
1545                         return -1;
1546                 }
1547         }
1548
1549         return 0;
1550 }
1551
1552 static long bq25700_init_usb(struct bq25700_device *charger)
1553 {
1554         struct extcon_dev *edev, *edev1;
1555         struct device *dev = charger->dev;
1556
1557         charger->usb_charger_wq = alloc_ordered_workqueue("%s",
1558                                                           WQ_MEM_RECLAIM |
1559                                                           WQ_FREEZABLE,
1560                                                           "bq25700-usb-wq");
1561         /* type-C */
1562         edev = extcon_get_edev_by_phandle(dev, 0);
1563         if (IS_ERR(edev)) {
1564                 if (PTR_ERR(edev) != -EPROBE_DEFER)
1565                         dev_err(dev, "Invalid or missing extcon\n");
1566                 charger->cable_edev = NULL;
1567         } else {
1568                 charger->cable_edev = edev;
1569         }
1570
1571         edev1 = extcon_get_edev_by_phandle(dev, 1);
1572         if (IS_ERR(edev1)) {
1573                 if (PTR_ERR(edev1) != -EPROBE_DEFER)
1574                         dev_err(dev, "Invalid or missing extcon\n");
1575                 charger->cable_edev_1 = NULL;
1576         } else {
1577                 charger->cable_edev_1 = edev1;
1578         }
1579         if (!charger->pd_charge_only)
1580                 bq25700_register_cg_nb(charger);
1581         bq25700_register_host_nb(charger);
1582         bq25700_register_discnt_nb(charger);
1583         bq25700_register_pd_nb(charger);
1584
1585         if (charger->cable_edev) {
1586                 schedule_delayed_work(&charger->host_work, 0);
1587                 schedule_delayed_work(&charger->pd_work, 0);
1588                 if (!charger->pd_charge_only)
1589                         schedule_delayed_work(&charger->usb_work, 0);
1590         }
1591         if (charger->cable_edev_1) {
1592                 schedule_delayed_work(&charger->host_work1, 0);
1593                 schedule_delayed_work(&charger->pd_work1, 0);
1594                 if (!charger->pd_charge_only)
1595                         schedule_delayed_work(&charger->usb_work1, 0);
1596         }
1597
1598         return 0;
1599 }
1600
1601 static int bq25700_parse_dt(struct bq25700_device *charger)
1602 {
1603         int ret;
1604         struct device_node *np = charger->dev->of_node;
1605
1606         charger->typec0_enable_io = devm_gpiod_get_optional(charger->dev,
1607                                                             "typec0-enable",
1608                                                             GPIOD_IN);
1609         if (!IS_ERR_OR_NULL(charger->typec0_enable_io))
1610                 gpiod_direction_output(charger->typec0_enable_io, 0);
1611
1612         charger->typec1_enable_io = devm_gpiod_get_optional(charger->dev,
1613                                                             "typec1-enable",
1614                                                             GPIOD_IN);
1615         if (!IS_ERR_OR_NULL(charger->typec1_enable_io))
1616                 gpiod_direction_output(charger->typec1_enable_io, 0);
1617
1618         charger->typec0_discharge_io =
1619                 devm_gpiod_get_optional(charger->dev, "typec0-discharge",
1620                                         GPIOD_IN);
1621
1622         charger->typec1_discharge_io =
1623                 devm_gpiod_get_optional(charger->dev, "typec1-discharge",
1624                                         GPIOD_IN);
1625
1626         ret = of_property_read_u32(np, "pd-charge-only",
1627                                    &charger->pd_charge_only);
1628         if (ret < 0)
1629                 dev_err(charger->dev, "pd-charge-only!\n");
1630
1631         return 0;
1632 }
1633
1634 static int bq25700_probe(struct i2c_client *client,
1635                          const struct i2c_device_id *id)
1636 {
1637         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1638         struct device *dev = &client->dev;
1639         struct bq25700_device *charger;
1640         int ret = 0;
1641         u32 i = 0;
1642         int irq_flag;
1643
1644         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
1645                 return -EIO;
1646
1647         charger = devm_kzalloc(&client->dev, sizeof(*charger), GFP_KERNEL);
1648         if (!charger)
1649                 return -EINVAL;
1650
1651         charger->client = client;
1652         charger->dev = dev;
1653         charger->regmap = devm_regmap_init_i2c(client,
1654                                                &bq25700_regmap_config);
1655
1656         if (IS_ERR(charger->regmap)) {
1657                 dev_err(&client->dev, "Failed to initialize regmap\n");
1658                 return -EINVAL;
1659         }
1660
1661         for (i = 0; i < ARRAY_SIZE(bq25700_reg_fields); i++) {
1662                 const struct reg_field *reg_fields = bq25700_reg_fields;
1663
1664                 charger->rmap_fields[i] =
1665                         devm_regmap_field_alloc(dev,
1666                                                 charger->regmap,
1667                                                 reg_fields[i]);
1668                 if (IS_ERR(charger->rmap_fields[i])) {
1669                         dev_err(dev, "cannot allocate regmap field\n");
1670                         return PTR_ERR(charger->rmap_fields[i]);
1671                 }
1672         }
1673
1674         i2c_set_clientdata(client, charger);
1675
1676         /*read chip id. Confirm whether to support the chip*/
1677         charger->chip_id = bq25700_field_read(charger, DEVICE_ID);
1678
1679         if (charger->chip_id < 0) {
1680                 dev_err(dev, "Cannot read chip ID.\n");
1681                 return charger->chip_id;
1682         }
1683
1684         if (!dev->platform_data) {
1685                 ret = bq25700_fw_probe(charger);
1686                 if (ret < 0) {
1687                         dev_err(dev, "Cannot read device properties.\n");
1688                         return ret;
1689                 }
1690         } else {
1691                 return -ENODEV;
1692         }
1693
1694         ret = bq25700_hw_init(charger);
1695         if (ret < 0) {
1696                 dev_err(dev, "Cannot initialize the chip.\n");
1697                 return ret;
1698         }
1699
1700         bq25700_parse_dt(charger);
1701
1702         bq25700_init_usb(charger);
1703         bq25700_init_sysfs(charger);
1704
1705         if (client->irq < 0) {
1706                 dev_err(dev, "No irq resource found.\n");
1707                 return client->irq;
1708         }
1709
1710         if (bq25700_field_read(charger, AC_STAT))
1711                 irq_flag = IRQF_TRIGGER_LOW;
1712         else
1713                 irq_flag = IRQF_TRIGGER_HIGH;
1714
1715         device_init_wakeup(dev, 1);
1716
1717         ret = devm_request_threaded_irq(dev, client->irq, NULL,
1718                                         bq25700_irq_handler_thread,
1719                                         irq_flag | IRQF_ONESHOT,
1720                                         "bq25700_irq", charger);
1721         if (ret)
1722                 goto irq_fail;
1723         enable_irq_wake(client->irq);
1724
1725         bq25700_power_supply_init(charger);
1726         bq25700_charger = charger;
1727
1728 irq_fail:
1729         return ret;
1730 }
1731
1732 #ifdef CONFIG_PM_SLEEP
1733 static int bq25700_pm_suspend(struct device *dev)
1734 {
1735         return 0;
1736 }
1737
1738 static int bq25700_pm_resume(struct device *dev)
1739 {
1740         return 0;
1741 }
1742 #endif
1743
1744 static SIMPLE_DEV_PM_OPS(bq25700_pm_ops, bq25700_pm_suspend, bq25700_pm_resume);
1745
1746 static const struct i2c_device_id bq25700_i2c_ids[] = {
1747         { "bq25700"},
1748         { },
1749 };
1750 MODULE_DEVICE_TABLE(i2c, bq25700_i2c_ids);
1751
1752 #ifdef CONFIG_OF
1753 static const struct of_device_id bq25700_of_match[] = {
1754         { .compatible = "ti,bq25700", },
1755         { },
1756 };
1757 MODULE_DEVICE_TABLE(of, bq25700_of_match);
1758 #else
1759 static const struct of_device_id bq25700_of_match[] = {
1760         { },
1761 };
1762 #endif
1763
1764 static struct i2c_driver bq25700_driver = {
1765         .probe          = bq25700_probe,
1766         .id_table       = bq25700_i2c_ids,
1767         .driver = {
1768                 .name           = "bq25700-charger",
1769                 .pm             = &bq25700_pm_ops,
1770                 .of_match_table = of_match_ptr(bq25700_of_match),
1771         },
1772 };
1773 module_i2c_driver(bq25700_driver);
1774
1775 MODULE_LICENSE("GPL");
1776 MODULE_AUTHOR("shengfeixu <xsf@rock-chips.com>");
1777 MODULE_DESCRIPTION("TI bq25700 Charger Driver");