drivers/regulator/ab8500-ext.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * License Terms: GNU General Public License v2
   5  *
   6  * Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
   7  *
   8  * This file is based on drivers/regulator/ab8500.c
   9  *
  10  * AB8500 external regulators
  11  *
  12  * ab8500-ext supports the following regulators:
  13  * - VextSupply3
  14  */
  15 #include <linux/init.h>
  16 #include <linux/kernel.h>
  17 #include <linux/err.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regulator/driver.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/regulator/of_regulator.h>
  24 #include <linux/mfd/abx500.h>
  25 #include <linux/mfd/abx500/ab8500.h>
  26 #include <linux/regulator/ab8500.h>
  27
  28 static struct regulator_consumer_supply ab8500_vaux1_consumers[] = {
  29         /* Main display, u8500 R3 uib */
  30         REGULATOR_SUPPLY("vddi", "mcde_disp_sony_acx424akp.0"),
  31         /* Main display, u8500 uib and ST uib */
  32         REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.0"),
  33         /* Secondary display, ST uib */
  34         REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.1"),
  35         /* SFH7741 proximity sensor */
  36         REGULATOR_SUPPLY("vcc", "gpio-keys.0"),
  37         /* BH1780GLS ambient light sensor */
  38         REGULATOR_SUPPLY("vcc", "2-0029"),
  39         /* lsm303dlh accelerometer */
  40         REGULATOR_SUPPLY("vdd", "2-0018"),
  41         /* lsm303dlhc accelerometer */
  42         REGULATOR_SUPPLY("vdd", "2-0019"),
  43         /* lsm303dlh magnetometer */
  44         REGULATOR_SUPPLY("vdd", "2-001e"),
  45         /* Rohm BU21013 Touchscreen devices */
  46         REGULATOR_SUPPLY("avdd", "3-005c"),
  47         REGULATOR_SUPPLY("avdd", "3-005d"),
  48         /* Synaptics RMI4 Touchscreen device */
  49         REGULATOR_SUPPLY("vdd", "3-004b"),
  50         /* L3G4200D Gyroscope device */
  51         REGULATOR_SUPPLY("vdd", "2-0068"),
  52         /* Ambient light sensor device */
  53         REGULATOR_SUPPLY("vdd", "3-0029"),
  54         /* Pressure sensor device */
  55         REGULATOR_SUPPLY("vdd", "2-005c"),
  56         /* Cypress TrueTouch Touchscreen device */
  57         REGULATOR_SUPPLY("vcpin", "spi8.0"),
  58         /* Camera device */
  59         REGULATOR_SUPPLY("vaux12v5", "mmio_camera"),
  60 };
  61
  62 static struct regulator_consumer_supply ab8500_vaux2_consumers[] = {
  63         /* On-board eMMC power */
  64         REGULATOR_SUPPLY("vmmc", "sdi4"),
  65         /* AB8500 audio codec */
  66         REGULATOR_SUPPLY("vcc-N2158", "ab8500-codec.0"),
  67         /* AB8500 accessory detect 1 */
  68         REGULATOR_SUPPLY("vcc-N2158", "ab8500-acc-det.0"),
  69         /* AB8500 Tv-out device */
  70         REGULATOR_SUPPLY("vcc-N2158", "mcde_tv_ab8500.4"),
  71         /* AV8100 HDMI device */
  72         REGULATOR_SUPPLY("vcc-N2158", "av8100_hdmi.3"),
  73 };
  74
  75 static struct regulator_consumer_supply ab8500_vaux3_consumers[] = {
  76         REGULATOR_SUPPLY("v-SD-STM", "stm"),
  77         /* External MMC slot power */
  78         REGULATOR_SUPPLY("vmmc", "sdi0"),
  79 };
  80
  81 static struct regulator_consumer_supply ab8500_vtvout_consumers[] = {
  82         /* TV-out DENC supply */
  83         REGULATOR_SUPPLY("vtvout", "ab8500-denc.0"),
  84         /* Internal general-purpose ADC */
  85         REGULATOR_SUPPLY("vddadc", "ab8500-gpadc.0"),
  86         /* ADC for charger */
  87         REGULATOR_SUPPLY("vddadc", "ab8500-charger.0"),
  88         /* AB8500 Tv-out device */
  89         REGULATOR_SUPPLY("vtvout", "mcde_tv_ab8500.4"),
  90 };
  91
  92 static struct regulator_consumer_supply ab8500_vaud_consumers[] = {
  93         /* AB8500 audio-codec main supply */
  94         REGULATOR_SUPPLY("vaud", "ab8500-codec.0"),
  95 };
  96
  97 static struct regulator_consumer_supply ab8500_vamic1_consumers[] = {
  98         /* AB8500 audio-codec Mic1 supply */
  99         REGULATOR_SUPPLY("vamic1", "ab8500-codec.0"),
 100 };
 101
 102 static struct regulator_consumer_supply ab8500_vamic2_consumers[] = {
 103         /* AB8500 audio-codec Mic2 supply */
 104         REGULATOR_SUPPLY("vamic2", "ab8500-codec.0"),
 105 };
 106
 107 static struct regulator_consumer_supply ab8500_vdmic_consumers[] = {
 108         /* AB8500 audio-codec DMic supply */
 109         REGULATOR_SUPPLY("vdmic", "ab8500-codec.0"),
 110 };
 111
 112 static struct regulator_consumer_supply ab8500_vintcore_consumers[] = {
 113         /* SoC core supply, no device */
 114         REGULATOR_SUPPLY("v-intcore", NULL),
 115         /* USB Transceiver */
 116         REGULATOR_SUPPLY("vddulpivio18", "ab8500-usb.0"),
 117         /* Handled by abx500 clk driver */
 118         REGULATOR_SUPPLY("v-intcore", "abx500-clk.0"),
 119 };
 120
 121 static struct regulator_consumer_supply ab8500_vana_consumers[] = {
 122         /* DB8500 DSI */
 123         REGULATOR_SUPPLY("vdddsi1v2", "mcde"),
 124         REGULATOR_SUPPLY("vdddsi1v2", "b2r2_core"),
 125         REGULATOR_SUPPLY("vdddsi1v2", "b2r2_1_core"),
 126         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.0"),
 127         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.1"),
 128         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.2"),
 129         /* DB8500 CSI */
 130         REGULATOR_SUPPLY("vddcsi1v2", "mmio_camera"),
 131 };
 132
 133 /* ab8500 regulator register initialization */
 134 static struct ab8500_regulator_reg_init ab8500_reg_init[] = {
 135         /*
 136          * VanaRequestCtrl          = HP/LP depending on VxRequest
 137          * VextSupply1RequestCtrl   = HP/LP depending on VxRequest
 138          */
 139         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL2,       0xf0, 0x00),
 140         /*
 141          * VextSupply2RequestCtrl   = HP/LP depending on VxRequest
 142          * VextSupply3RequestCtrl   = HP/LP depending on VxRequest
 143          * Vaux1RequestCtrl         = HP/LP depending on VxRequest
 144          * Vaux2RequestCtrl         = HP/LP depending on VxRequest
 145          */
 146         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL3,       0xff, 0x00),
 147         /*
 148          * Vaux3RequestCtrl         = HP/LP depending on VxRequest
 149          * SwHPReq                  = Control through SWValid disabled
 150          */
 151         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL4,       0x07, 0x00),
 152         /*
 153          * VanaSysClkReq1HPValid    = disabled
 154          * Vaux1SysClkReq1HPValid   = disabled
 155          * Vaux2SysClkReq1HPValid   = disabled
 156          * Vaux3SysClkReq1HPValid   = disabled
 157          */
 158         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID1, 0xe8, 0x00),
 159         /*
 160          * VextSupply1SysClkReq1HPValid = disabled
 161          * VextSupply2SysClkReq1HPValid = disabled
 162          * VextSupply3SysClkReq1HPValid = SysClkReq1 controlled
 163          */
 164         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID2, 0x70, 0x40),
 165         /*
 166          * VanaHwHPReq1Valid        = disabled
 167          * Vaux1HwHPreq1Valid       = disabled
 168          * Vaux2HwHPReq1Valid       = disabled
 169          * Vaux3HwHPReqValid        = disabled
 170          */
 171         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID1,     0xe8, 0x00),
 172         /*
 173          * VextSupply1HwHPReq1Valid = disabled
 174          * VextSupply2HwHPReq1Valid = disabled
 175          * VextSupply3HwHPReq1Valid = disabled
 176          */
 177         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID2,     0x07, 0x00),
 178         /*
 179          * VanaHwHPReq2Valid        = disabled
 180          * Vaux1HwHPReq2Valid       = disabled
 181          * Vaux2HwHPReq2Valid       = disabled
 182          * Vaux3HwHPReq2Valid       = disabled
 183          */
 184         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID1,     0xe8, 0x00),
 185         /*
 186          * VextSupply1HwHPReq2Valid = disabled
 187          * VextSupply2HwHPReq2Valid = disabled
 188          * VextSupply3HwHPReq2Valid = HWReq2 controlled
 189          */
 190         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID2,     0x07, 0x04),
 191         /*
 192          * VanaSwHPReqValid         = disabled
 193          * Vaux1SwHPReqValid        = disabled
 194          */
 195         INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID1,      0xa0, 0x00),
 196         /*
 197          * Vaux2SwHPReqValid        = disabled
 198          * Vaux3SwHPReqValid        = disabled
 199          * VextSupply1SwHPReqValid  = disabled
 200          * VextSupply2SwHPReqValid  = disabled
 201          * VextSupply3SwHPReqValid  = disabled
 202          */
 203         INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID2,      0x1f, 0x00),
 204         /*
 205          * SysClkReq2Valid1         = SysClkReq2 controlled
 206          * SysClkReq3Valid1         = disabled
 207          * SysClkReq4Valid1         = SysClkReq4 controlled
 208          * SysClkReq5Valid1         = disabled
 209          * SysClkReq6Valid1         = SysClkReq6 controlled
 210          * SysClkReq7Valid1         = disabled
 211          * SysClkReq8Valid1         = disabled
 212          */
 213         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID1,    0xfe, 0x2a),
 214         /*
 215          * SysClkReq2Valid2         = disabled
 216          * SysClkReq3Valid2         = disabled
 217          * SysClkReq4Valid2         = disabled
 218          * SysClkReq5Valid2         = disabled
 219          * SysClkReq6Valid2         = SysClkReq6 controlled
 220          * SysClkReq7Valid2         = disabled
 221          * SysClkReq8Valid2         = disabled
 222          */
 223         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID2,    0xfe, 0x20),
 224         /*
 225          * VTVoutEna                = disabled
 226          * Vintcore12Ena            = disabled
 227          * Vintcore12Sel            = 1.25 V
 228          * Vintcore12LP             = inactive (HP)
 229          * VTVoutLP                 = inactive (HP)
 230          */
 231         INIT_REGULATOR_REGISTER(AB8500_REGUMISC1,              0xfe, 0x10),
 232         /*
 233          * VaudioEna                = disabled
 234          * VdmicEna                 = disabled
 235          * Vamic1Ena                = disabled
 236          * Vamic2Ena                = disabled
 237          */
 238         INIT_REGULATOR_REGISTER(AB8500_VAUDIOSUPPLY,           0x1e, 0x00),
 239         /*
 240          * Vamic1_dzout             = high-Z when Vamic1 is disabled
 241          * Vamic2_dzout             = high-Z when Vamic2 is disabled
 242          */
 243         INIT_REGULATOR_REGISTER(AB8500_REGUCTRL1VAMIC,         0x03, 0x00),
 244         /*
 245          * VPll                     = Hw controlled (NOTE! PRCMU bits)
 246          * VanaRegu                 = force off
 247          */
 248         INIT_REGULATOR_REGISTER(AB8500_VPLLVANAREGU,           0x0f, 0x02),
 249         /*
 250          * VrefDDREna               = disabled
 251          * VrefDDRSleepMode         = inactive (no pulldown)
 252          */
 253         INIT_REGULATOR_REGISTER(AB8500_VREFDDR,                0x03, 0x00),
 254         /*
 255          * VextSupply1Regu          = force LP
 256          * VextSupply2Regu          = force OFF
 257          * VextSupply3Regu          = force HP (-> STBB2=LP and TPS=LP)
 258          * ExtSupply2Bypass         = ExtSupply12LPn ball is 0 when Ena is 0
 259          * ExtSupply3Bypass         = ExtSupply3LPn ball is 0 when Ena is 0
 260          */
 261         INIT_REGULATOR_REGISTER(AB8500_EXTSUPPLYREGU,          0xff, 0x13),
 262         /*
 263          * Vaux1Regu                = force HP
 264          * Vaux2Regu                = force off
 265          */
 266         INIT_REGULATOR_REGISTER(AB8500_VAUX12REGU,             0x0f, 0x01),
 267         /*
 268          * Vaux3Regu                = force off
 269          */
 270         INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3REGU,          0x03, 0x00),
 271         /*
 272          * Vaux1Sel                 = 2.8 V
 273          */
 274         INIT_REGULATOR_REGISTER(AB8500_VAUX1SEL,               0x0f, 0x0C),
 275         /*
 276          * Vaux2Sel                 = 2.9 V
 277          */
 278         INIT_REGULATOR_REGISTER(AB8500_VAUX2SEL,               0x0f, 0x0d),
 279         /*
 280          * Vaux3Sel                 = 2.91 V
 281          */
 282         INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3SEL,           0x07, 0x07),
 283         /*
 284          * VextSupply12LP           = disabled (no LP)
 285          */
 286         INIT_REGULATOR_REGISTER(AB8500_REGUCTRL2SPARE,         0x01, 0x00),
 287         /*
 288          * Vaux1Disch               = short discharge time
 289          * Vaux2Disch               = short discharge time
 290          * Vaux3Disch               = short discharge time
 291          * Vintcore12Disch          = short discharge time
 292          * VTVoutDisch              = short discharge time
 293          * VaudioDisch              = short discharge time
 294          */
 295         INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH,          0xfc, 0x00),
 296         /*
 297          * VanaDisch                = short discharge time
 298          * VdmicPullDownEna         = pulldown disabled when Vdmic is disabled
 299          * VdmicDisch               = short discharge time
 300          */
 301         INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH2,         0x16, 0x00),
 302 };
 303
 304 /* AB8500 regulators */
 305 static struct regulator_init_data ab8500_regulators[AB8500_NUM_REGULATORS] = {
 306         /* supplies to the display/camera */
 307         [AB8500_LDO_AUX1] = {
 308                 .supply_regulator = "ab8500-ext-supply3",
 309                 .constraints = {
 310                         .name = "V-DISPLAY",
 311                         .min_uV = 2800000,
 312                         .max_uV = 3300000,
 313                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 314                                           REGULATOR_CHANGE_STATUS,
 315                         .boot_on = 1, /* display is on at boot */
 316                 },
 317                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux1_consumers),
 318                 .consumer_supplies = ab8500_vaux1_consumers,
 319         },
 320         /* supplies to the on-board eMMC */
 321         [AB8500_LDO_AUX2] = {
 322                 .supply_regulator = "ab8500-ext-supply3",
 323                 .constraints = {
 324                         .name = "V-eMMC1",
 325                         .min_uV = 1100000,
 326                         .max_uV = 3300000,
 327                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 328                                           REGULATOR_CHANGE_STATUS |
 329                                           REGULATOR_CHANGE_MODE,
 330                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
 331                                             REGULATOR_MODE_IDLE,
 332                 },
 333                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux2_consumers),
 334                 .consumer_supplies = ab8500_vaux2_consumers,
 335         },
 336         /* supply for VAUX3, supplies to SDcard slots */
 337         [AB8500_LDO_AUX3] = {
 338                 .supply_regulator = "ab8500-ext-supply3",
 339                 .constraints = {
 340                         .name = "V-MMC-SD",
 341                         .min_uV = 1100000,
 342                         .max_uV = 3300000,
 343                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 344                                           REGULATOR_CHANGE_STATUS |
 345                                           REGULATOR_CHANGE_MODE,
 346                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
 347                                             REGULATOR_MODE_IDLE,
 348                 },
 349                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux3_consumers),
 350                 .consumer_supplies = ab8500_vaux3_consumers,
 351         },
 352         /* supply for tvout, gpadc, TVOUT LDO */
 353         [AB8500_LDO_TVOUT] = {
 354                 .constraints = {
 355                         .name = "V-TVOUT",
 356                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 357                 },
 358                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vtvout_consumers),
 359                 .consumer_supplies = ab8500_vtvout_consumers,
 360         },
 361         /* supply for ab8500-vaudio, VAUDIO LDO */
 362         [AB8500_LDO_AUDIO] = {
 363                 .constraints = {
 364                         .name = "V-AUD",
 365                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 366                 },
 367                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaud_consumers),
 368                 .consumer_supplies = ab8500_vaud_consumers,
 369         },
 370         /* supply for v-anamic1 VAMic1-LDO */
 371         [AB8500_LDO_ANAMIC1] = {
 372                 .constraints = {
 373                         .name = "V-AMIC1",
 374                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 375                 },
 376                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic1_consumers),
 377                 .consumer_supplies = ab8500_vamic1_consumers,
 378         },
 379         /* supply for v-amic2, VAMIC2 LDO, reuse constants for AMIC1 */
 380         [AB8500_LDO_ANAMIC2] = {
 381                 .constraints = {
 382                         .name = "V-AMIC2",
 383                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 384                 },
 385                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic2_consumers),
 386                 .consumer_supplies = ab8500_vamic2_consumers,
 387         },
 388         /* supply for v-dmic, VDMIC LDO */
 389         [AB8500_LDO_DMIC] = {
 390                 .constraints = {
 391                         .name = "V-DMIC",
 392                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 393                 },
 394                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vdmic_consumers),
 395                 .consumer_supplies = ab8500_vdmic_consumers,
 396         },
 397         /* supply for v-intcore12, VINTCORE12 LDO */
 398         [AB8500_LDO_INTCORE] = {
 399                 .constraints = {
 400                         .name = "V-INTCORE",
 401                         .min_uV = 1250000,
 402                         .max_uV = 1350000,
 403                         .input_uV = 1800000,
 404                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 405                                           REGULATOR_CHANGE_STATUS |
 406                                           REGULATOR_CHANGE_MODE |
 407                                           REGULATOR_CHANGE_DRMS,
 408                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
 409                                             REGULATOR_MODE_IDLE,
 410                 },
 411                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vintcore_consumers),
 412                 .consumer_supplies = ab8500_vintcore_consumers,
 413         },
 414         /* supply for U8500 CSI-DSI, VANA LDO */
 415         [AB8500_LDO_ANA] = {
 416                 .constraints = {
 417                         .name = "V-CSI-DSI",
 418                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 419                 },
 420                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vana_consumers),
 421                 .consumer_supplies = ab8500_vana_consumers,
 422         },
 423 };
 424
 425 /* supply for VextSupply3 */
 426 static struct regulator_consumer_supply ab8500_ext_supply3_consumers[] = {
 427         /* SIM supply for 3 V SIM cards */
 428         REGULATOR_SUPPLY("vinvsim", "sim-detect.0"),
 429 };
 430
 431 /*
 432  * AB8500 external regulators
 433  */
 434 static struct regulator_init_data ab8500_ext_regulators[] = {
 435         /* fixed Vbat supplies VSMPS1_EXT_1V8 */
 436         [AB8500_EXT_SUPPLY1] = {
 437                 .constraints = {
 438                         .name = "ab8500-ext-supply1",
 439                         .min_uV = 1800000,
 440                         .max_uV = 1800000,
 441                         .initial_mode = REGULATOR_MODE_IDLE,
 442                         .boot_on = 1,
 443                         .always_on = 1,
 444                 },
 445         },
 446         /* fixed Vbat supplies VSMPS2_EXT_1V36 and VSMPS5_EXT_1V15 */
 447         [AB8500_EXT_SUPPLY2] = {
 448                 .constraints = {
 449                         .name = "ab8500-ext-supply2",
 450                         .min_uV = 1360000,
 451                         .max_uV = 1360000,
 452                 },
 453         },
 454         /* fixed Vbat supplies VSMPS3_EXT_3V4 and VSMPS4_EXT_3V4 */
 455         [AB8500_EXT_SUPPLY3] = {
 456                 .constraints = {
 457                         .name = "ab8500-ext-supply3",
 458                         .min_uV = 3400000,
 459                         .max_uV = 3400000,
 460                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 461                         .boot_on = 1,
 462                 },
 463                 .num_consumer_supplies =
 464                         ARRAY_SIZE(ab8500_ext_supply3_consumers),
 465                 .consumer_supplies = ab8500_ext_supply3_consumers,
 466         },
 467 };
 468
 469 static struct ab8500_regulator_platform_data ab8500_regulator_plat_data = {
 470         .reg_init               = ab8500_reg_init,
 471         .num_reg_init           = ARRAY_SIZE(ab8500_reg_init),
 472         .regulator              = ab8500_regulators,
 473         .num_regulator          = ARRAY_SIZE(ab8500_regulators),
 474         .ext_regulator          = ab8500_ext_regulators,
 475         .num_ext_regulator      = ARRAY_SIZE(ab8500_ext_regulators),
 476 };
 477
 478 /**
 479  * struct ab8500_ext_regulator_info - ab8500 regulator information
 480  * @dev: device pointer
 481  * @desc: regulator description
 482  * @rdev: regulator device
 483  * @cfg: regulator configuration (extension of regulator FW configuration)
 484  * @update_bank: bank to control on/off
 485  * @update_reg: register to control on/off
 486  * @update_mask: mask to enable/disable and set mode of regulator
 487  * @update_val: bits holding the regulator current mode
 488  * @update_val_hp: bits to set EN pin active (LPn pin deactive)
 489  *                 normally this means high power mode
 490  * @update_val_lp: bits to set EN pin active and LPn pin active
 491  *                 normally this means low power mode
 492  * @update_val_hw: bits to set regulator pins in HW control
 493  *                 SysClkReq pins and logic will choose mode
 494  */
 495 struct ab8500_ext_regulator_info {
 496         struct device *dev;
 497         struct regulator_desc desc;
 498         struct regulator_dev *rdev;
 499         struct ab8500_ext_regulator_cfg *cfg;
 500         u8 update_bank;
 501         u8 update_reg;
 502         u8 update_mask;
 503         u8 update_val;
 504         u8 update_val_hp;
 505         u8 update_val_lp;
 506         u8 update_val_hw;
 507 };
 508
 509 static int ab8500_ext_regulator_enable(struct regulator_dev *rdev)
 510 {
 511         int ret;
 512         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 513         u8 regval;
 514
 515         if (info == NULL) {
 516                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 517                 return -EINVAL;
 518         }
 519
 520         /*
 521          * To satisfy both HW high power request and SW request, the regulator
 522          * must be on in high power.
 523          */
 524         if (info->cfg && info->cfg->hwreq)
 525                 regval = info->update_val_hp;
 526         else
 527                 regval = info->update_val;
 528
 529         ret = abx500_mask_and_set_register_interruptible(info->dev,
 530                 info->update_bank, info->update_reg,
 531                 info->update_mask, regval);
 532         if (ret < 0) {
 533                 dev_err(rdev_get_dev(info->rdev),
 534                         "couldn't set enable bits for regulator\n");
 535                 return ret;
 536         }
 537
 538         dev_dbg(rdev_get_dev(rdev),
 539                 "%s-enable (bank, reg, mask, value): 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 540                 info->desc.name, info->update_bank, info->update_reg,
 541                 info->update_mask, regval);
 542
 543         return 0;
 544 }
 545
 546 static int ab8500_ext_regulator_disable(struct regulator_dev *rdev)
 547 {
 548         int ret;
 549         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 550         u8 regval;
 551
 552         if (info == NULL) {
 553                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 554                 return -EINVAL;
 555         }
 556
 557         /*
 558          * Set the regulator in HW request mode if configured
 559          */
 560         if (info->cfg && info->cfg->hwreq)
 561                 regval = info->update_val_hw;
 562         else
 563                 regval = 0;
 564
 565         ret = abx500_mask_and_set_register_interruptible(info->dev,
 566                 info->update_bank, info->update_reg,
 567                 info->update_mask, regval);
 568         if (ret < 0) {
 569                 dev_err(rdev_get_dev(info->rdev),
 570                         "couldn't set disable bits for regulator\n");
 571                 return ret;
 572         }
 573
 574         dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):"
 575                 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 576                 info->desc.name, info->update_bank, info->update_reg,
 577                 info->update_mask, regval);
 578
 579         return 0;
 580 }
 581
 582 static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
 583 {
 584         int ret;
 585         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 586         u8 regval;
 587
 588         if (info == NULL) {
 589                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 590                 return -EINVAL;
 591         }
 592
 593         ret = abx500_get_register_interruptible(info->dev,
 594                 info->update_bank, info->update_reg, &regval);
 595         if (ret < 0) {
 596                 dev_err(rdev_get_dev(rdev),
 597                         "couldn't read 0x%x register\n", info->update_reg);
 598                 return ret;
 599         }
 600
 601         dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):"
 602                 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 603                 info->desc.name, info->update_bank, info->update_reg,
 604                 info->update_mask, regval);
 605
 606         if (((regval & info->update_mask) == info->update_val_lp) ||
 607             ((regval & info->update_mask) == info->update_val_hp))
 608                 return 1;
 609         else
 610                 return 0;
 611 }
 612
 613 static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
 614                                          unsigned int mode)
 615 {
 616         int ret = 0;
 617         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 618         u8 regval;
 619
 620         if (info == NULL) {
 621                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 622                 return -EINVAL;
 623         }
 624
 625         switch (mode) {
 626         case REGULATOR_MODE_NORMAL:
 627                 regval = info->update_val_hp;
 628                 break;
 629         case REGULATOR_MODE_IDLE:
 630                 regval = info->update_val_lp;
 631                 break;
 632
 633         default:
 634                 return -EINVAL;
 635         }
 636
 637         /* If regulator is enabled and info->cfg->hwreq is set, the regulator
 638            must be on in high power, so we don't need to write the register with
 639            the same value.
 640          */
 641         if (ab8500_ext_regulator_is_enabled(rdev) &&
 642             !(info->cfg && info->cfg->hwreq)) {
 643                 ret = abx500_mask_and_set_register_interruptible(info->dev,
 644                                         info->update_bank, info->update_reg,
 645                                         info->update_mask, regval);
 646                 if (ret < 0) {
 647                         dev_err(rdev_get_dev(rdev),
 648                                 "Could not set regulator mode.\n");
 649                         return ret;
 650                 }
 651
 652                 dev_dbg(rdev_get_dev(rdev),
 653                         "%s-set_mode (bank, reg, mask, value): "
 654                         "0x%x, 0x%x, 0x%x, 0x%x\n",
 655                         info->desc.name, info->update_bank, info->update_reg,
 656                         info->update_mask, regval);
 657         }
 658
 659         info->update_val = regval;
 660
 661         return 0;
 662 }
 663
 664 static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
 665 {
 666         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 667         int ret;
 668
 669         if (info == NULL) {
 670                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 671                 return -EINVAL;
 672         }
 673
 674         if (info->update_val == info->update_val_hp)
 675                 ret = REGULATOR_MODE_NORMAL;
 676         else if (info->update_val == info->update_val_lp)
 677                 ret = REGULATOR_MODE_IDLE;
 678         else
 679                 ret = -EINVAL;
 680
 681         return ret;
 682 }
 683
 684 static int ab8500_ext_set_voltage(struct regulator_dev *rdev, int min_uV,
 685                                   int max_uV, unsigned *selector)
 686 {
 687         struct regulation_constraints *regu_constraints = rdev->constraints;
 688
 689         if (!regu_constraints) {
 690                 dev_err(rdev_get_dev(rdev), "No regulator constraints\n");
 691                 return -EINVAL;
 692         }
 693
 694         if (regu_constraints->min_uV == min_uV &&
 695             regu_constraints->max_uV == max_uV)
 696                 return 0;
 697
 698         dev_err(rdev_get_dev(rdev),
 699                 "Requested min %duV max %duV != constrained min %duV max %duV\n",
 700                 min_uV, max_uV,
 701                 regu_constraints->min_uV, regu_constraints->max_uV);
 702
 703         return -EINVAL;
 704 }
 705
 706 static int ab8500_ext_list_voltage(struct regulator_dev *rdev,
 707                                    unsigned selector)
 708 {
 709         struct regulation_constraints *regu_constraints = rdev->constraints;
 710
 711         if (regu_constraints == NULL) {
 712                 dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
 713                 return -EINVAL;
 714         }
 715         /* return the uV for the fixed regulators */
 716         if (regu_constraints->min_uV && regu_constraints->max_uV) {
 717                 if (regu_constraints->min_uV == regu_constraints->max_uV)
 718                         return regu_constraints->min_uV;
 719         }
 720         return -EINVAL;
 721 }
 722
 723 static struct regulator_ops ab8500_ext_regulator_ops = {
 724         .enable                 = ab8500_ext_regulator_enable,
 725         .disable                = ab8500_ext_regulator_disable,
 726         .is_enabled             = ab8500_ext_regulator_is_enabled,
 727         .set_mode               = ab8500_ext_regulator_set_mode,
 728         .get_mode               = ab8500_ext_regulator_get_mode,
 729         .set_voltage            = ab8500_ext_set_voltage,
 730         .list_voltage           = ab8500_ext_list_voltage,
 731 };
 732
 733 static struct ab8500_ext_regulator_info
 734                 ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = {
 735         [AB8500_EXT_SUPPLY1] = {
 736                 .desc = {
 737                         .name           = "VEXTSUPPLY1",
 738                         .ops            = &ab8500_ext_regulator_ops,
 739                         .type           = REGULATOR_VOLTAGE,
 740                         .id             = AB8500_EXT_SUPPLY1,
 741                         .owner          = THIS_MODULE,
 742                         .n_voltages     = 1,
 743                 },
 744                 .update_bank            = 0x04,
 745                 .update_reg             = 0x08,
 746                 .update_mask            = 0x03,
 747                 .update_val             = 0x01,
 748                 .update_val_hp          = 0x01,
 749                 .update_val_lp          = 0x03,
 750                 .update_val_hw          = 0x02,
 751         },
 752         [AB8500_EXT_SUPPLY2] = {
 753                 .desc = {
 754                         .name           = "VEXTSUPPLY2",
 755                         .ops            = &ab8500_ext_regulator_ops,
 756                         .type           = REGULATOR_VOLTAGE,
 757                         .id             = AB8500_EXT_SUPPLY2,
 758                         .owner          = THIS_MODULE,
 759                         .n_voltages     = 1,
 760                 },
 761                 .update_bank            = 0x04,
 762                 .update_reg             = 0x08,
 763                 .update_mask            = 0x0c,
 764                 .update_val             = 0x04,
 765                 .update_val_hp          = 0x04,
 766                 .update_val_lp          = 0x0c,
 767                 .update_val_hw          = 0x08,
 768         },
 769         [AB8500_EXT_SUPPLY3] = {
 770                 .desc = {
 771                         .name           = "VEXTSUPPLY3",
 772                         .ops            = &ab8500_ext_regulator_ops,
 773                         .type           = REGULATOR_VOLTAGE,
 774                         .id             = AB8500_EXT_SUPPLY3,
 775                         .owner          = THIS_MODULE,
 776                         .n_voltages     = 1,
 777                 },
 778                 .update_bank            = 0x04,
 779                 .update_reg             = 0x08,
 780                 .update_mask            = 0x30,
 781                 .update_val             = 0x10,
 782                 .update_val_hp          = 0x10,
 783                 .update_val_lp          = 0x30,
 784                 .update_val_hw          = 0x20,
 785         },
 786 };
 787
 788 static struct of_regulator_match ab8500_ext_regulator_match[] = {
 789         { .name = "ab8500_ext1", .driver_data = (void *) AB8500_EXT_SUPPLY1, },
 790         { .name = "ab8500_ext2", .driver_data = (void *) AB8500_EXT_SUPPLY2, },
 791         { .name = "ab8500_ext3", .driver_data = (void *) AB8500_EXT_SUPPLY3, },
 792 };
 793
 794 static int ab8500_ext_regulator_probe(struct platform_device *pdev)
 795 {
 796         struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
 797         struct ab8500_regulator_platform_data *pdata = &ab8500_regulator_plat_data;
 798         struct device_node *np = pdev->dev.of_node;
 799         struct regulator_config config = { };
 800         int i, err;
 801
 802         if (np) {
 803                 err = of_regulator_match(&pdev->dev, np,
 804                                          ab8500_ext_regulator_match,
 805                                          ARRAY_SIZE(ab8500_ext_regulator_match));
 806                 if (err < 0) {
 807                         dev_err(&pdev->dev,
 808                                 "Error parsing regulator init data: %d\n", err);
 809                         return err;
 810                 }
 811         }
 812
 813         if (!ab8500) {
 814                 dev_err(&pdev->dev, "null mfd parent\n");
 815                 return -EINVAL;
 816         }
 817
 818         /* make sure the platform data has the correct size */
 819         if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
 820                 dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
 821                 return -EINVAL;
 822         }
 823
 824         /* check for AB8500 2.x */
 825         if (is_ab8500_2p0_or_earlier(ab8500)) {
 826                 struct ab8500_ext_regulator_info *info;
 827
 828                 /* VextSupply3LPn is inverted on AB8500 2.x */
 829                 info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3];
 830                 info->update_val = 0x30;
 831                 info->update_val_hp = 0x30;
 832                 info->update_val_lp = 0x10;
 833         }
 834
 835         /* register all regulators */
 836         for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
 837                 struct ab8500_ext_regulator_info *info = NULL;
 838
 839                 /* assign per-regulator data */
 840                 info = &ab8500_ext_regulator_info[i];
 841                 info->dev = &pdev->dev;
 842                 info->cfg = (struct ab8500_ext_regulator_cfg *)
 843                         pdata->ext_regulator[i].driver_data;
 844
 845                 config.dev = &pdev->dev;
 846                 config.driver_data = info;
 847                 config.of_node = ab8500_ext_regulator_match[i].of_node;
 848                 config.init_data = (np) ?
 849                         ab8500_ext_regulator_match[i].init_data :
 850                         &pdata->ext_regulator[i];
 851
 852                 /* register regulator with framework */
 853                 info->rdev = devm_regulator_register(&pdev->dev, &info->desc,
 854                                                      &config);
 855                 if (IS_ERR(info->rdev)) {
 856                         err = PTR_ERR(info->rdev);
 857                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 858                                         info->desc.name);
 859                         return err;
 860                 }
 861
 862                 dev_dbg(rdev_get_dev(info->rdev),
 863                         "%s-probed\n", info->desc.name);
 864         }
 865
 866         return 0;
 867 }
 868
 869 static struct platform_driver ab8500_ext_regulator_driver = {
 870         .probe = ab8500_ext_regulator_probe,
 871         .driver         = {
 872                 .name   = "ab8500-ext-regulator",
 873         },
 874 };
 875
 876 static int __init ab8500_ext_regulator_init(void)
 877 {
 878         int ret;
 879
 880         ret = platform_driver_register(&ab8500_ext_regulator_driver);
 881         if (ret)
 882                 pr_err("Failed to register ab8500 ext regulator: %d\n", ret);
 883
 884         return ret;
 885 }
 886 subsys_initcall(ab8500_ext_regulator_init);
 887
 888 static void __exit ab8500_ext_regulator_exit(void)
 889 {
 890         platform_driver_unregister(&ab8500_ext_regulator_driver);
 891 }
 892 module_exit(ab8500_ext_regulator_exit);
 893
 894 MODULE_LICENSE("GPL v2");
 895 MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>");
 896 MODULE_DESCRIPTION("AB8500 external regulator driver");
 897 MODULE_ALIAS("platform:ab8500-ext-regulator");