drivers/mfd/axp20x.c

   1 /*
   2  * axp20x.c - MFD core driver for the X-Powers' Power Management ICs
   3  *
   4  * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
   5  * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
   6  * as well as configurable GPIOs.
   7  *
   8  * Author: Carlo Caione <carlo@caione.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/err.h>
  16 #include <linux/i2c.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/mfd/axp20x.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/of_device.h>
  27 #include <linux/of_irq.h>
  28 #include <linux/acpi.h>
  29
  30 #define AXP20X_OFF      0x80
  31
  32 static const char * const axp20x_model_names[] = {
  33         "AXP202",
  34         "AXP209",
  35         "AXP221",
  36         "AXP288",
  37 };
  38
  39 static const struct regmap_range axp20x_writeable_ranges[] = {
  40         regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE),
  41         regmap_reg_range(AXP20X_DCDC_MODE, AXP20X_FG_RES),
  42 };
  43
  44 static const struct regmap_range axp20x_volatile_ranges[] = {
  45         regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE),
  46 };
  47
  48 static const struct regmap_access_table axp20x_writeable_table = {
  49         .yes_ranges     = axp20x_writeable_ranges,
  50         .n_yes_ranges   = ARRAY_SIZE(axp20x_writeable_ranges),
  51 };
  52
  53 static const struct regmap_access_table axp20x_volatile_table = {
  54         .yes_ranges     = axp20x_volatile_ranges,
  55         .n_yes_ranges   = ARRAY_SIZE(axp20x_volatile_ranges),
  56 };
  57
  58 static const struct regmap_range axp22x_writeable_ranges[] = {
  59         regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE),
  60         regmap_reg_range(AXP20X_DCDC_MODE, AXP22X_BATLOW_THRES1),
  61 };
  62
  63 static const struct regmap_range axp22x_volatile_ranges[] = {
  64         regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE),
  65 };
  66
  67 static const struct regmap_access_table axp22x_writeable_table = {
  68         .yes_ranges     = axp22x_writeable_ranges,
  69         .n_yes_ranges   = ARRAY_SIZE(axp22x_writeable_ranges),
  70 };
  71
  72 static const struct regmap_access_table axp22x_volatile_table = {
  73         .yes_ranges     = axp22x_volatile_ranges,
  74         .n_yes_ranges   = ARRAY_SIZE(axp22x_volatile_ranges),
  75 };
  76
  77 static const struct regmap_range axp288_writeable_ranges[] = {
  78         regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ6_STATE),
  79         regmap_reg_range(AXP20X_DCDC_MODE, AXP288_FG_TUNE5),
  80 };
  81
  82 static const struct regmap_range axp288_volatile_ranges[] = {
  83         regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IPSOUT_V_HIGH_L),
  84 };
  85
  86 static const struct regmap_access_table axp288_writeable_table = {
  87         .yes_ranges     = axp288_writeable_ranges,
  88         .n_yes_ranges   = ARRAY_SIZE(axp288_writeable_ranges),
  89 };
  90
  91 static const struct regmap_access_table axp288_volatile_table = {
  92         .yes_ranges     = axp288_volatile_ranges,
  93         .n_yes_ranges   = ARRAY_SIZE(axp288_volatile_ranges),
  94 };
  95
  96 static struct resource axp20x_pek_resources[] = {
  97         {
  98                 .name   = "PEK_DBR",
  99                 .start  = AXP20X_IRQ_PEK_RIS_EDGE,
 100                 .end    = AXP20X_IRQ_PEK_RIS_EDGE,
 101                 .flags  = IORESOURCE_IRQ,
 102         }, {
 103                 .name   = "PEK_DBF",
 104                 .start  = AXP20X_IRQ_PEK_FAL_EDGE,
 105                 .end    = AXP20X_IRQ_PEK_FAL_EDGE,
 106                 .flags  = IORESOURCE_IRQ,
 107         },
 108 };
 109
 110 static struct resource axp22x_pek_resources[] = {
 111         {
 112                 .name   = "PEK_DBR",
 113                 .start  = AXP22X_IRQ_PEK_RIS_EDGE,
 114                 .end    = AXP22X_IRQ_PEK_RIS_EDGE,
 115                 .flags  = IORESOURCE_IRQ,
 116         }, {
 117                 .name   = "PEK_DBF",
 118                 .start  = AXP22X_IRQ_PEK_FAL_EDGE,
 119                 .end    = AXP22X_IRQ_PEK_FAL_EDGE,
 120                 .flags  = IORESOURCE_IRQ,
 121         },
 122 };
 123
 124 static struct resource axp288_fuel_gauge_resources[] = {
 125         {
 126                 .start = AXP288_IRQ_QWBTU,
 127                 .end   = AXP288_IRQ_QWBTU,
 128                 .flags = IORESOURCE_IRQ,
 129         },
 130         {
 131                 .start = AXP288_IRQ_WBTU,
 132                 .end   = AXP288_IRQ_WBTU,
 133                 .flags = IORESOURCE_IRQ,
 134         },
 135         {
 136                 .start = AXP288_IRQ_QWBTO,
 137                 .end   = AXP288_IRQ_QWBTO,
 138                 .flags = IORESOURCE_IRQ,
 139         },
 140         {
 141                 .start = AXP288_IRQ_WBTO,
 142                 .end   = AXP288_IRQ_WBTO,
 143                 .flags = IORESOURCE_IRQ,
 144         },
 145         {
 146                 .start = AXP288_IRQ_WL2,
 147                 .end   = AXP288_IRQ_WL2,
 148                 .flags = IORESOURCE_IRQ,
 149         },
 150         {
 151                 .start = AXP288_IRQ_WL1,
 152                 .end   = AXP288_IRQ_WL1,
 153                 .flags = IORESOURCE_IRQ,
 154         },
 155 };
 156
 157 static const struct regmap_config axp20x_regmap_config = {
 158         .reg_bits       = 8,
 159         .val_bits       = 8,
 160         .wr_table       = &axp20x_writeable_table,
 161         .volatile_table = &axp20x_volatile_table,
 162         .max_register   = AXP20X_FG_RES,
 163         .cache_type     = REGCACHE_RBTREE,
 164 };
 165
 166 static const struct regmap_config axp22x_regmap_config = {
 167         .reg_bits       = 8,
 168         .val_bits       = 8,
 169         .wr_table       = &axp22x_writeable_table,
 170         .volatile_table = &axp22x_volatile_table,
 171         .max_register   = AXP22X_BATLOW_THRES1,
 172         .cache_type     = REGCACHE_RBTREE,
 173 };
 174
 175 static const struct regmap_config axp288_regmap_config = {
 176         .reg_bits       = 8,
 177         .val_bits       = 8,
 178         .wr_table       = &axp288_writeable_table,
 179         .volatile_table = &axp288_volatile_table,
 180         .max_register   = AXP288_FG_TUNE5,
 181         .cache_type     = REGCACHE_RBTREE,
 182 };
 183
 184 #define INIT_REGMAP_IRQ(_variant, _irq, _off, _mask)                    \
 185         [_variant##_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) }
 186
 187 static const struct regmap_irq axp20x_regmap_irqs[] = {
 188         INIT_REGMAP_IRQ(AXP20X, ACIN_OVER_V,            0, 7),
 189         INIT_REGMAP_IRQ(AXP20X, ACIN_PLUGIN,            0, 6),
 190         INIT_REGMAP_IRQ(AXP20X, ACIN_REMOVAL,           0, 5),
 191         INIT_REGMAP_IRQ(AXP20X, VBUS_OVER_V,            0, 4),
 192         INIT_REGMAP_IRQ(AXP20X, VBUS_PLUGIN,            0, 3),
 193         INIT_REGMAP_IRQ(AXP20X, VBUS_REMOVAL,           0, 2),
 194         INIT_REGMAP_IRQ(AXP20X, VBUS_V_LOW,             0, 1),
 195         INIT_REGMAP_IRQ(AXP20X, BATT_PLUGIN,            1, 7),
 196         INIT_REGMAP_IRQ(AXP20X, BATT_REMOVAL,           1, 6),
 197         INIT_REGMAP_IRQ(AXP20X, BATT_ENT_ACT_MODE,      1, 5),
 198         INIT_REGMAP_IRQ(AXP20X, BATT_EXIT_ACT_MODE,     1, 4),
 199         INIT_REGMAP_IRQ(AXP20X, CHARG,                  1, 3),
 200         INIT_REGMAP_IRQ(AXP20X, CHARG_DONE,             1, 2),
 201         INIT_REGMAP_IRQ(AXP20X, BATT_TEMP_HIGH,         1, 1),
 202         INIT_REGMAP_IRQ(AXP20X, BATT_TEMP_LOW,          1, 0),
 203         INIT_REGMAP_IRQ(AXP20X, DIE_TEMP_HIGH,          2, 7),
 204         INIT_REGMAP_IRQ(AXP20X, CHARG_I_LOW,            2, 6),
 205         INIT_REGMAP_IRQ(AXP20X, DCDC1_V_LONG,           2, 5),
 206         INIT_REGMAP_IRQ(AXP20X, DCDC2_V_LONG,           2, 4),
 207         INIT_REGMAP_IRQ(AXP20X, DCDC3_V_LONG,           2, 3),
 208         INIT_REGMAP_IRQ(AXP20X, PEK_SHORT,              2, 1),
 209         INIT_REGMAP_IRQ(AXP20X, PEK_LONG,               2, 0),
 210         INIT_REGMAP_IRQ(AXP20X, N_OE_PWR_ON,            3, 7),
 211         INIT_REGMAP_IRQ(AXP20X, N_OE_PWR_OFF,           3, 6),
 212         INIT_REGMAP_IRQ(AXP20X, VBUS_VALID,             3, 5),
 213         INIT_REGMAP_IRQ(AXP20X, VBUS_NOT_VALID,         3, 4),
 214         INIT_REGMAP_IRQ(AXP20X, VBUS_SESS_VALID,        3, 3),
 215         INIT_REGMAP_IRQ(AXP20X, VBUS_SESS_END,          3, 2),
 216         INIT_REGMAP_IRQ(AXP20X, LOW_PWR_LVL1,           3, 1),
 217         INIT_REGMAP_IRQ(AXP20X, LOW_PWR_LVL2,           3, 0),
 218         INIT_REGMAP_IRQ(AXP20X, TIMER,                  4, 7),
 219         INIT_REGMAP_IRQ(AXP20X, PEK_RIS_EDGE,           4, 6),
 220         INIT_REGMAP_IRQ(AXP20X, PEK_FAL_EDGE,           4, 5),
 221         INIT_REGMAP_IRQ(AXP20X, GPIO3_INPUT,            4, 3),
 222         INIT_REGMAP_IRQ(AXP20X, GPIO2_INPUT,            4, 2),
 223         INIT_REGMAP_IRQ(AXP20X, GPIO1_INPUT,            4, 1),
 224         INIT_REGMAP_IRQ(AXP20X, GPIO0_INPUT,            4, 0),
 225 };
 226
 227 static const struct regmap_irq axp22x_regmap_irqs[] = {
 228         INIT_REGMAP_IRQ(AXP22X, ACIN_OVER_V,            0, 7),
 229         INIT_REGMAP_IRQ(AXP22X, ACIN_PLUGIN,            0, 6),
 230         INIT_REGMAP_IRQ(AXP22X, ACIN_REMOVAL,           0, 5),
 231         INIT_REGMAP_IRQ(AXP22X, VBUS_OVER_V,            0, 4),
 232         INIT_REGMAP_IRQ(AXP22X, VBUS_PLUGIN,            0, 3),
 233         INIT_REGMAP_IRQ(AXP22X, VBUS_REMOVAL,           0, 2),
 234         INIT_REGMAP_IRQ(AXP22X, VBUS_V_LOW,             0, 1),
 235         INIT_REGMAP_IRQ(AXP22X, BATT_PLUGIN,            1, 7),
 236         INIT_REGMAP_IRQ(AXP22X, BATT_REMOVAL,           1, 6),
 237         INIT_REGMAP_IRQ(AXP22X, BATT_ENT_ACT_MODE,      1, 5),
 238         INIT_REGMAP_IRQ(AXP22X, BATT_EXIT_ACT_MODE,     1, 4),
 239         INIT_REGMAP_IRQ(AXP22X, CHARG,                  1, 3),
 240         INIT_REGMAP_IRQ(AXP22X, CHARG_DONE,             1, 2),
 241         INIT_REGMAP_IRQ(AXP22X, BATT_TEMP_HIGH,         1, 1),
 242         INIT_REGMAP_IRQ(AXP22X, BATT_TEMP_LOW,          1, 0),
 243         INIT_REGMAP_IRQ(AXP22X, DIE_TEMP_HIGH,          2, 7),
 244         INIT_REGMAP_IRQ(AXP22X, PEK_SHORT,              2, 1),
 245         INIT_REGMAP_IRQ(AXP22X, PEK_LONG,               2, 0),
 246         INIT_REGMAP_IRQ(AXP22X, LOW_PWR_LVL1,           3, 1),
 247         INIT_REGMAP_IRQ(AXP22X, LOW_PWR_LVL2,           3, 0),
 248         INIT_REGMAP_IRQ(AXP22X, TIMER,                  4, 7),
 249         INIT_REGMAP_IRQ(AXP22X, PEK_RIS_EDGE,           4, 6),
 250         INIT_REGMAP_IRQ(AXP22X, PEK_FAL_EDGE,           4, 5),
 251         INIT_REGMAP_IRQ(AXP22X, GPIO1_INPUT,            4, 1),
 252         INIT_REGMAP_IRQ(AXP22X, GPIO0_INPUT,            4, 0),
 253 };
 254
 255 /* some IRQs are compatible with axp20x models */
 256 static const struct regmap_irq axp288_regmap_irqs[] = {
 257         INIT_REGMAP_IRQ(AXP288, VBUS_FALL,              0, 2),
 258         INIT_REGMAP_IRQ(AXP288, VBUS_RISE,              0, 3),
 259         INIT_REGMAP_IRQ(AXP288, OV,                     0, 4),
 260
 261         INIT_REGMAP_IRQ(AXP288, DONE,                   1, 2),
 262         INIT_REGMAP_IRQ(AXP288, CHARGING,               1, 3),
 263         INIT_REGMAP_IRQ(AXP288, SAFE_QUIT,              1, 4),
 264         INIT_REGMAP_IRQ(AXP288, SAFE_ENTER,             1, 5),
 265         INIT_REGMAP_IRQ(AXP288, ABSENT,                 1, 6),
 266         INIT_REGMAP_IRQ(AXP288, APPEND,                 1, 7),
 267
 268         INIT_REGMAP_IRQ(AXP288, QWBTU,                  2, 0),
 269         INIT_REGMAP_IRQ(AXP288, WBTU,                   2, 1),
 270         INIT_REGMAP_IRQ(AXP288, QWBTO,                  2, 2),
 271         INIT_REGMAP_IRQ(AXP288, WBTO,                   2, 3),
 272         INIT_REGMAP_IRQ(AXP288, QCBTU,                  2, 4),
 273         INIT_REGMAP_IRQ(AXP288, CBTU,                   2, 5),
 274         INIT_REGMAP_IRQ(AXP288, QCBTO,                  2, 6),
 275         INIT_REGMAP_IRQ(AXP288, CBTO,                   2, 7),
 276
 277         INIT_REGMAP_IRQ(AXP288, WL2,                    3, 0),
 278         INIT_REGMAP_IRQ(AXP288, WL1,                    3, 1),
 279         INIT_REGMAP_IRQ(AXP288, GPADC,                  3, 2),
 280         INIT_REGMAP_IRQ(AXP288, OT,                     3, 7),
 281
 282         INIT_REGMAP_IRQ(AXP288, GPIO0,                  4, 0),
 283         INIT_REGMAP_IRQ(AXP288, GPIO1,                  4, 1),
 284         INIT_REGMAP_IRQ(AXP288, POKO,                   4, 2),
 285         INIT_REGMAP_IRQ(AXP288, POKL,                   4, 3),
 286         INIT_REGMAP_IRQ(AXP288, POKS,                   4, 4),
 287         INIT_REGMAP_IRQ(AXP288, POKN,                   4, 5),
 288         INIT_REGMAP_IRQ(AXP288, POKP,                   4, 6),
 289         INIT_REGMAP_IRQ(AXP288, TIMER,                  4, 7),
 290
 291         INIT_REGMAP_IRQ(AXP288, MV_CHNG,                5, 0),
 292         INIT_REGMAP_IRQ(AXP288, BC_USB_CHNG,            5, 1),
 293 };
 294
 295 static const struct of_device_id axp20x_of_match[] = {
 296         { .compatible = "x-powers,axp202", .data = (void *) AXP202_ID },
 297         { .compatible = "x-powers,axp209", .data = (void *) AXP209_ID },
 298         { .compatible = "x-powers,axp221", .data = (void *) AXP221_ID },
 299         { },
 300 };
 301 MODULE_DEVICE_TABLE(of, axp20x_of_match);
 302
 303 /*
 304  * This is useless for OF-enabled devices, but it is needed by I2C subsystem
 305  */
 306 static const struct i2c_device_id axp20x_i2c_id[] = {
 307         { },
 308 };
 309 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
 310
 311 static const struct acpi_device_id axp20x_acpi_match[] = {
 312         {
 313                 .id = "INT33F4",
 314                 .driver_data = AXP288_ID,
 315         },
 316         { },
 317 };
 318 MODULE_DEVICE_TABLE(acpi, axp20x_acpi_match);
 319
 320 static const struct regmap_irq_chip axp20x_regmap_irq_chip = {
 321         .name                   = "axp20x_irq_chip",
 322         .status_base            = AXP20X_IRQ1_STATE,
 323         .ack_base               = AXP20X_IRQ1_STATE,
 324         .mask_base              = AXP20X_IRQ1_EN,
 325         .mask_invert            = true,
 326         .init_ack_masked        = true,
 327         .irqs                   = axp20x_regmap_irqs,
 328         .num_irqs               = ARRAY_SIZE(axp20x_regmap_irqs),
 329         .num_regs               = 5,
 330
 331 };
 332
 333 static const struct regmap_irq_chip axp22x_regmap_irq_chip = {
 334         .name                   = "axp22x_irq_chip",
 335         .status_base            = AXP20X_IRQ1_STATE,
 336         .ack_base               = AXP20X_IRQ1_STATE,
 337         .mask_base              = AXP20X_IRQ1_EN,
 338         .mask_invert            = true,
 339         .init_ack_masked        = true,
 340         .irqs                   = axp22x_regmap_irqs,
 341         .num_irqs               = ARRAY_SIZE(axp22x_regmap_irqs),
 342         .num_regs               = 5,
 343 };
 344
 345 static const struct regmap_irq_chip axp288_regmap_irq_chip = {
 346         .name                   = "axp288_irq_chip",
 347         .status_base            = AXP20X_IRQ1_STATE,
 348         .ack_base               = AXP20X_IRQ1_STATE,
 349         .mask_base              = AXP20X_IRQ1_EN,
 350         .mask_invert            = true,
 351         .init_ack_masked        = true,
 352         .irqs                   = axp288_regmap_irqs,
 353         .num_irqs               = ARRAY_SIZE(axp288_regmap_irqs),
 354         .num_regs               = 6,
 355
 356 };
 357
 358 static struct mfd_cell axp20x_cells[] = {
 359         {
 360                 .name                   = "axp20x-pek",
 361                 .num_resources          = ARRAY_SIZE(axp20x_pek_resources),
 362                 .resources              = axp20x_pek_resources,
 363         }, {
 364                 .name                   = "axp20x-regulator",
 365         },
 366 };
 367
 368 static struct mfd_cell axp22x_cells[] = {
 369         {
 370                 .name                   = "axp20x-pek",
 371                 .num_resources          = ARRAY_SIZE(axp22x_pek_resources),
 372                 .resources              = axp22x_pek_resources,
 373         }, {
 374                 .name                   = "axp20x-regulator",
 375         },
 376 };
 377
 378 static struct resource axp288_adc_resources[] = {
 379         {
 380                 .name  = "GPADC",
 381                 .start = AXP288_IRQ_GPADC,
 382                 .end   = AXP288_IRQ_GPADC,
 383                 .flags = IORESOURCE_IRQ,
 384         },
 385 };
 386
 387 static struct resource axp288_extcon_resources[] = {
 388         {
 389                 .start = AXP288_IRQ_VBUS_FALL,
 390                 .end   = AXP288_IRQ_VBUS_FALL,
 391                 .flags = IORESOURCE_IRQ,
 392         },
 393         {
 394                 .start = AXP288_IRQ_VBUS_RISE,
 395                 .end   = AXP288_IRQ_VBUS_RISE,
 396                 .flags = IORESOURCE_IRQ,
 397         },
 398         {
 399                 .start = AXP288_IRQ_MV_CHNG,
 400                 .end   = AXP288_IRQ_MV_CHNG,
 401                 .flags = IORESOURCE_IRQ,
 402         },
 403         {
 404                 .start = AXP288_IRQ_BC_USB_CHNG,
 405                 .end   = AXP288_IRQ_BC_USB_CHNG,
 406                 .flags = IORESOURCE_IRQ,
 407         },
 408 };
 409
 410 static struct resource axp288_charger_resources[] = {
 411         {
 412                 .start = AXP288_IRQ_OV,
 413                 .end   = AXP288_IRQ_OV,
 414                 .flags = IORESOURCE_IRQ,
 415         },
 416         {
 417                 .start = AXP288_IRQ_DONE,
 418                 .end   = AXP288_IRQ_DONE,
 419                 .flags = IORESOURCE_IRQ,
 420         },
 421         {
 422                 .start = AXP288_IRQ_CHARGING,
 423                 .end   = AXP288_IRQ_CHARGING,
 424                 .flags = IORESOURCE_IRQ,
 425         },
 426         {
 427                 .start = AXP288_IRQ_SAFE_QUIT,
 428                 .end   = AXP288_IRQ_SAFE_QUIT,
 429                 .flags = IORESOURCE_IRQ,
 430         },
 431         {
 432                 .start = AXP288_IRQ_SAFE_ENTER,
 433                 .end   = AXP288_IRQ_SAFE_ENTER,
 434                 .flags = IORESOURCE_IRQ,
 435         },
 436         {
 437                 .start = AXP288_IRQ_QCBTU,
 438                 .end   = AXP288_IRQ_QCBTU,
 439                 .flags = IORESOURCE_IRQ,
 440         },
 441         {
 442                 .start = AXP288_IRQ_CBTU,
 443                 .end   = AXP288_IRQ_CBTU,
 444                 .flags = IORESOURCE_IRQ,
 445         },
 446         {
 447                 .start = AXP288_IRQ_QCBTO,
 448                 .end   = AXP288_IRQ_QCBTO,
 449                 .flags = IORESOURCE_IRQ,
 450         },
 451         {
 452                 .start = AXP288_IRQ_CBTO,
 453                 .end   = AXP288_IRQ_CBTO,
 454                 .flags = IORESOURCE_IRQ,
 455         },
 456 };
 457
 458 static struct mfd_cell axp288_cells[] = {
 459         {
 460                 .name = "axp288_adc",
 461                 .num_resources = ARRAY_SIZE(axp288_adc_resources),
 462                 .resources = axp288_adc_resources,
 463         },
 464         {
 465                 .name = "axp288_extcon",
 466                 .num_resources = ARRAY_SIZE(axp288_extcon_resources),
 467                 .resources = axp288_extcon_resources,
 468         },
 469         {
 470                 .name = "axp288_charger",
 471                 .num_resources = ARRAY_SIZE(axp288_charger_resources),
 472                 .resources = axp288_charger_resources,
 473         },
 474         {
 475                 .name = "axp288_fuel_gauge",
 476                 .num_resources = ARRAY_SIZE(axp288_fuel_gauge_resources),
 477                 .resources = axp288_fuel_gauge_resources,
 478         },
 479         {
 480                 .name = "axp288_pmic_acpi",
 481         },
 482 };
 483
 484 static struct axp20x_dev *axp20x_pm_power_off;
 485 static void axp20x_power_off(void)
 486 {
 487         if (axp20x_pm_power_off->variant == AXP288_ID)
 488                 return;
 489
 490         regmap_write(axp20x_pm_power_off->regmap, AXP20X_OFF_CTRL,
 491                      AXP20X_OFF);
 492 }
 493
 494 static int axp20x_match_device(struct axp20x_dev *axp20x, struct device *dev)
 495 {
 496         const struct acpi_device_id *acpi_id;
 497         const struct of_device_id *of_id;
 498
 499         if (dev->of_node) {
 500                 of_id = of_match_device(axp20x_of_match, dev);
 501                 if (!of_id) {
 502                         dev_err(dev, "Unable to match OF ID\n");
 503                         return -ENODEV;
 504                 }
 505                 axp20x->variant = (long) of_id->data;
 506         } else {
 507                 acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
 508                 if (!acpi_id || !acpi_id->driver_data) {
 509                         dev_err(dev, "Unable to match ACPI ID and data\n");
 510                         return -ENODEV;
 511                 }
 512                 axp20x->variant = (long) acpi_id->driver_data;
 513         }
 514
 515         switch (axp20x->variant) {
 516         case AXP202_ID:
 517         case AXP209_ID:
 518                 axp20x->nr_cells = ARRAY_SIZE(axp20x_cells);
 519                 axp20x->cells = axp20x_cells;
 520                 axp20x->regmap_cfg = &axp20x_regmap_config;
 521                 axp20x->regmap_irq_chip = &axp20x_regmap_irq_chip;
 522                 break;
 523         case AXP221_ID:
 524                 axp20x->nr_cells = ARRAY_SIZE(axp22x_cells);
 525                 axp20x->cells = axp22x_cells;
 526                 axp20x->regmap_cfg = &axp22x_regmap_config;
 527                 axp20x->regmap_irq_chip = &axp22x_regmap_irq_chip;
 528                 break;
 529         case AXP288_ID:
 530                 axp20x->cells = axp288_cells;
 531                 axp20x->nr_cells = ARRAY_SIZE(axp288_cells);
 532                 axp20x->regmap_cfg = &axp288_regmap_config;
 533                 axp20x->regmap_irq_chip = &axp288_regmap_irq_chip;
 534                 break;
 535         default:
 536                 dev_err(dev, "unsupported AXP20X ID %lu\n", axp20x->variant);
 537                 return -EINVAL;
 538         }
 539         dev_info(dev, "AXP20x variant %s found\n",
 540                 axp20x_model_names[axp20x->variant]);
 541
 542         return 0;
 543 }
 544
 545 static int axp20x_i2c_probe(struct i2c_client *i2c,
 546                          const struct i2c_device_id *id)
 547 {
 548         struct axp20x_dev *axp20x;
 549         int ret;
 550
 551         axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
 552         if (!axp20x)
 553                 return -ENOMEM;
 554
 555         ret = axp20x_match_device(axp20x, &i2c->dev);
 556         if (ret)
 557                 return ret;
 558
 559         axp20x->i2c_client = i2c;
 560         axp20x->dev = &i2c->dev;
 561         dev_set_drvdata(axp20x->dev, axp20x);
 562
 563         axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
 564         if (IS_ERR(axp20x->regmap)) {
 565                 ret = PTR_ERR(axp20x->regmap);
 566                 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
 567                 return ret;
 568         }
 569
 570         ret = regmap_add_irq_chip(axp20x->regmap, i2c->irq,
 571                                   IRQF_ONESHOT | IRQF_SHARED, -1,
 572                                   axp20x->regmap_irq_chip,
 573                                   &axp20x->regmap_irqc);
 574         if (ret) {
 575                 dev_err(&i2c->dev, "failed to add irq chip: %d\n", ret);
 576                 return ret;
 577         }
 578
 579         ret = mfd_add_devices(axp20x->dev, -1, axp20x->cells,
 580                         axp20x->nr_cells, NULL, 0, NULL);
 581
 582         if (ret) {
 583                 dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
 584                 regmap_del_irq_chip(i2c->irq, axp20x->regmap_irqc);
 585                 return ret;
 586         }
 587
 588         if (!pm_power_off) {
 589                 axp20x_pm_power_off = axp20x;
 590                 pm_power_off = axp20x_power_off;
 591         }
 592
 593         dev_info(&i2c->dev, "AXP20X driver loaded\n");
 594
 595         return 0;
 596 }
 597
 598 static int axp20x_i2c_remove(struct i2c_client *i2c)
 599 {
 600         struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
 601
 602         if (axp20x == axp20x_pm_power_off) {
 603                 axp20x_pm_power_off = NULL;
 604                 pm_power_off = NULL;
 605         }
 606
 607         mfd_remove_devices(axp20x->dev);
 608         regmap_del_irq_chip(axp20x->i2c_client->irq, axp20x->regmap_irqc);
 609
 610         return 0;
 611 }
 612
 613 static struct i2c_driver axp20x_i2c_driver = {
 614         .driver = {
 615                 .name   = "axp20x",
 616                 .owner  = THIS_MODULE,
 617                 .of_match_table = of_match_ptr(axp20x_of_match),
 618                 .acpi_match_table = ACPI_PTR(axp20x_acpi_match),
 619         },
 620         .probe          = axp20x_i2c_probe,
 621         .remove         = axp20x_i2c_remove,
 622         .id_table       = axp20x_i2c_id,
 623 };
 624
 625 module_i2c_driver(axp20x_i2c_driver);
 626
 627 MODULE_DESCRIPTION("PMIC MFD core driver for AXP20X");
 628 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
 629 MODULE_LICENSE("GPL");