drivers/regulator/ab8500-ext.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) ST-Ericsson SA 2010
   4  *
   5  * Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
   6  *
   7  * This file is based on drivers/regulator/ab8500.c
   8  *
   9  * AB8500 external regulators
  10  *
  11  * ab8500-ext supports the following regulators:
  12  * - VextSupply3
  13  */
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/err.h>
  17 #include <linux/module.h>
  18 #include <linux/of.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regulator/driver.h>
  21 #include <linux/regulator/machine.h>
  22 #include <linux/regulator/of_regulator.h>
  23 #include <linux/mfd/abx500.h>
  24 #include <linux/mfd/abx500/ab8500.h>
  25 #include <linux/regulator/ab8500.h>
  26
  27 static struct regulator_consumer_supply ab8500_vaux1_consumers[] = {
  28         /* Main display, u8500 R3 uib */
  29         REGULATOR_SUPPLY("vddi", "mcde_disp_sony_acx424akp.0"),
  30         /* Main display, u8500 uib and ST uib */
  31         REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.0"),
  32         /* Secondary display, ST uib */
  33         REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.1"),
  34         /* SFH7741 proximity sensor */
  35         REGULATOR_SUPPLY("vcc", "gpio-keys.0"),
  36         /* BH1780GLS ambient light sensor */
  37         REGULATOR_SUPPLY("vcc", "2-0029"),
  38         /* lsm303dlh accelerometer */
  39         REGULATOR_SUPPLY("vdd", "2-0018"),
  40         /* lsm303dlhc accelerometer */
  41         REGULATOR_SUPPLY("vdd", "2-0019"),
  42         /* lsm303dlh magnetometer */
  43         REGULATOR_SUPPLY("vdd", "2-001e"),
  44         /* Rohm BU21013 Touchscreen devices */
  45         REGULATOR_SUPPLY("avdd", "3-005c"),
  46         REGULATOR_SUPPLY("avdd", "3-005d"),
  47         /* Synaptics RMI4 Touchscreen device */
  48         REGULATOR_SUPPLY("vdd", "3-004b"),
  49         /* L3G4200D Gyroscope device */
  50         REGULATOR_SUPPLY("vdd", "2-0068"),
  51         /* Ambient light sensor device */
  52         REGULATOR_SUPPLY("vdd", "3-0029"),
  53         /* Pressure sensor device */
  54         REGULATOR_SUPPLY("vdd", "2-005c"),
  55         /* Cypress TrueTouch Touchscreen device */
  56         REGULATOR_SUPPLY("vcpin", "spi8.0"),
  57         /* Camera device */
  58         REGULATOR_SUPPLY("vaux12v5", "mmio_camera"),
  59 };
  60
  61 static struct regulator_consumer_supply ab8500_vaux2_consumers[] = {
  62         /* On-board eMMC power */
  63         REGULATOR_SUPPLY("vmmc", "sdi4"),
  64         /* AB8500 audio codec */
  65         REGULATOR_SUPPLY("vcc-N2158", "ab8500-codec.0"),
  66         /* AB8500 accessory detect 1 */
  67         REGULATOR_SUPPLY("vcc-N2158", "ab8500-acc-det.0"),
  68         /* AB8500 Tv-out device */
  69         REGULATOR_SUPPLY("vcc-N2158", "mcde_tv_ab8500.4"),
  70         /* AV8100 HDMI device */
  71         REGULATOR_SUPPLY("vcc-N2158", "av8100_hdmi.3"),
  72 };
  73
  74 static struct regulator_consumer_supply ab8500_vaux3_consumers[] = {
  75         REGULATOR_SUPPLY("v-SD-STM", "stm"),
  76         /* External MMC slot power */
  77         REGULATOR_SUPPLY("vmmc", "sdi0"),
  78 };
  79
  80 static struct regulator_consumer_supply ab8500_vtvout_consumers[] = {
  81         /* TV-out DENC supply */
  82         REGULATOR_SUPPLY("vtvout", "ab8500-denc.0"),
  83         /* Internal general-purpose ADC */
  84         REGULATOR_SUPPLY("vddadc", "ab8500-gpadc.0"),
  85         /* ADC for charger */
  86         REGULATOR_SUPPLY("vddadc", "ab8500-charger.0"),
  87         /* AB8500 Tv-out device */
  88         REGULATOR_SUPPLY("vtvout", "mcde_tv_ab8500.4"),
  89 };
  90
  91 static struct regulator_consumer_supply ab8500_vaud_consumers[] = {
  92         /* AB8500 audio-codec main supply */
  93         REGULATOR_SUPPLY("vaud", "ab8500-codec.0"),
  94 };
  95
  96 static struct regulator_consumer_supply ab8500_vamic1_consumers[] = {
  97         /* AB8500 audio-codec Mic1 supply */
  98         REGULATOR_SUPPLY("vamic1", "ab8500-codec.0"),
  99 };
 100
 101 static struct regulator_consumer_supply ab8500_vamic2_consumers[] = {
 102         /* AB8500 audio-codec Mic2 supply */
 103         REGULATOR_SUPPLY("vamic2", "ab8500-codec.0"),
 104 };
 105
 106 static struct regulator_consumer_supply ab8500_vdmic_consumers[] = {
 107         /* AB8500 audio-codec DMic supply */
 108         REGULATOR_SUPPLY("vdmic", "ab8500-codec.0"),
 109 };
 110
 111 static struct regulator_consumer_supply ab8500_vintcore_consumers[] = {
 112         /* SoC core supply, no device */
 113         REGULATOR_SUPPLY("v-intcore", NULL),
 114         /* USB Transceiver */
 115         REGULATOR_SUPPLY("vddulpivio18", "ab8500-usb.0"),
 116         /* Handled by abx500 clk driver */
 117         REGULATOR_SUPPLY("v-intcore", "abx500-clk.0"),
 118 };
 119
 120 static struct regulator_consumer_supply ab8500_vana_consumers[] = {
 121         /* DB8500 DSI */
 122         REGULATOR_SUPPLY("vdddsi1v2", "mcde"),
 123         REGULATOR_SUPPLY("vdddsi1v2", "b2r2_core"),
 124         REGULATOR_SUPPLY("vdddsi1v2", "b2r2_1_core"),
 125         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.0"),
 126         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.1"),
 127         REGULATOR_SUPPLY("vdddsi1v2", "dsilink.2"),
 128         /* DB8500 CSI */
 129         REGULATOR_SUPPLY("vddcsi1v2", "mmio_camera"),
 130 };
 131
 132 /* ab8500 regulator register initialization */
 133 static struct ab8500_regulator_reg_init ab8500_reg_init[] = {
 134         /*
 135          * VanaRequestCtrl          = HP/LP depending on VxRequest
 136          * VextSupply1RequestCtrl   = HP/LP depending on VxRequest
 137          */
 138         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL2,       0xf0, 0x00),
 139         /*
 140          * VextSupply2RequestCtrl   = HP/LP depending on VxRequest
 141          * VextSupply3RequestCtrl   = HP/LP depending on VxRequest
 142          * Vaux1RequestCtrl         = HP/LP depending on VxRequest
 143          * Vaux2RequestCtrl         = HP/LP depending on VxRequest
 144          */
 145         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL3,       0xff, 0x00),
 146         /*
 147          * Vaux3RequestCtrl         = HP/LP depending on VxRequest
 148          * SwHPReq                  = Control through SWValid disabled
 149          */
 150         INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL4,       0x07, 0x00),
 151         /*
 152          * VanaSysClkReq1HPValid    = disabled
 153          * Vaux1SysClkReq1HPValid   = disabled
 154          * Vaux2SysClkReq1HPValid   = disabled
 155          * Vaux3SysClkReq1HPValid   = disabled
 156          */
 157         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID1, 0xe8, 0x00),
 158         /*
 159          * VextSupply1SysClkReq1HPValid = disabled
 160          * VextSupply2SysClkReq1HPValid = disabled
 161          * VextSupply3SysClkReq1HPValid = SysClkReq1 controlled
 162          */
 163         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID2, 0x70, 0x40),
 164         /*
 165          * VanaHwHPReq1Valid        = disabled
 166          * Vaux1HwHPreq1Valid       = disabled
 167          * Vaux2HwHPReq1Valid       = disabled
 168          * Vaux3HwHPReqValid        = disabled
 169          */
 170         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID1,     0xe8, 0x00),
 171         /*
 172          * VextSupply1HwHPReq1Valid = disabled
 173          * VextSupply2HwHPReq1Valid = disabled
 174          * VextSupply3HwHPReq1Valid = disabled
 175          */
 176         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID2,     0x07, 0x00),
 177         /*
 178          * VanaHwHPReq2Valid        = disabled
 179          * Vaux1HwHPReq2Valid       = disabled
 180          * Vaux2HwHPReq2Valid       = disabled
 181          * Vaux3HwHPReq2Valid       = disabled
 182          */
 183         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID1,     0xe8, 0x00),
 184         /*
 185          * VextSupply1HwHPReq2Valid = disabled
 186          * VextSupply2HwHPReq2Valid = disabled
 187          * VextSupply3HwHPReq2Valid = HWReq2 controlled
 188          */
 189         INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID2,     0x07, 0x04),
 190         /*
 191          * VanaSwHPReqValid         = disabled
 192          * Vaux1SwHPReqValid        = disabled
 193          */
 194         INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID1,      0xa0, 0x00),
 195         /*
 196          * Vaux2SwHPReqValid        = disabled
 197          * Vaux3SwHPReqValid        = disabled
 198          * VextSupply1SwHPReqValid  = disabled
 199          * VextSupply2SwHPReqValid  = disabled
 200          * VextSupply3SwHPReqValid  = disabled
 201          */
 202         INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID2,      0x1f, 0x00),
 203         /*
 204          * SysClkReq2Valid1         = SysClkReq2 controlled
 205          * SysClkReq3Valid1         = disabled
 206          * SysClkReq4Valid1         = SysClkReq4 controlled
 207          * SysClkReq5Valid1         = disabled
 208          * SysClkReq6Valid1         = SysClkReq6 controlled
 209          * SysClkReq7Valid1         = disabled
 210          * SysClkReq8Valid1         = disabled
 211          */
 212         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID1,    0xfe, 0x2a),
 213         /*
 214          * SysClkReq2Valid2         = disabled
 215          * SysClkReq3Valid2         = disabled
 216          * SysClkReq4Valid2         = disabled
 217          * SysClkReq5Valid2         = disabled
 218          * SysClkReq6Valid2         = SysClkReq6 controlled
 219          * SysClkReq7Valid2         = disabled
 220          * SysClkReq8Valid2         = disabled
 221          */
 222         INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID2,    0xfe, 0x20),
 223         /*
 224          * VTVoutEna                = disabled
 225          * Vintcore12Ena            = disabled
 226          * Vintcore12Sel            = 1.25 V
 227          * Vintcore12LP             = inactive (HP)
 228          * VTVoutLP                 = inactive (HP)
 229          */
 230         INIT_REGULATOR_REGISTER(AB8500_REGUMISC1,              0xfe, 0x10),
 231         /*
 232          * VaudioEna                = disabled
 233          * VdmicEna                 = disabled
 234          * Vamic1Ena                = disabled
 235          * Vamic2Ena                = disabled
 236          */
 237         INIT_REGULATOR_REGISTER(AB8500_VAUDIOSUPPLY,           0x1e, 0x00),
 238         /*
 239          * Vamic1_dzout             = high-Z when Vamic1 is disabled
 240          * Vamic2_dzout             = high-Z when Vamic2 is disabled
 241          */
 242         INIT_REGULATOR_REGISTER(AB8500_REGUCTRL1VAMIC,         0x03, 0x00),
 243         /*
 244          * VPll                     = Hw controlled (NOTE! PRCMU bits)
 245          * VanaRegu                 = force off
 246          */
 247         INIT_REGULATOR_REGISTER(AB8500_VPLLVANAREGU,           0x0f, 0x02),
 248         /*
 249          * VrefDDREna               = disabled
 250          * VrefDDRSleepMode         = inactive (no pulldown)
 251          */
 252         INIT_REGULATOR_REGISTER(AB8500_VREFDDR,                0x03, 0x00),
 253         /*
 254          * VextSupply1Regu          = force LP
 255          * VextSupply2Regu          = force OFF
 256          * VextSupply3Regu          = force HP (-> STBB2=LP and TPS=LP)
 257          * ExtSupply2Bypass         = ExtSupply12LPn ball is 0 when Ena is 0
 258          * ExtSupply3Bypass         = ExtSupply3LPn ball is 0 when Ena is 0
 259          */
 260         INIT_REGULATOR_REGISTER(AB8500_EXTSUPPLYREGU,          0xff, 0x13),
 261         /*
 262          * Vaux1Regu                = force HP
 263          * Vaux2Regu                = force off
 264          */
 265         INIT_REGULATOR_REGISTER(AB8500_VAUX12REGU,             0x0f, 0x01),
 266         /*
 267          * Vaux3Regu                = force off
 268          */
 269         INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3REGU,          0x03, 0x00),
 270         /*
 271          * Vaux1Sel                 = 2.8 V
 272          */
 273         INIT_REGULATOR_REGISTER(AB8500_VAUX1SEL,               0x0f, 0x0C),
 274         /*
 275          * Vaux2Sel                 = 2.9 V
 276          */
 277         INIT_REGULATOR_REGISTER(AB8500_VAUX2SEL,               0x0f, 0x0d),
 278         /*
 279          * Vaux3Sel                 = 2.91 V
 280          */
 281         INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3SEL,           0x07, 0x07),
 282         /*
 283          * VextSupply12LP           = disabled (no LP)
 284          */
 285         INIT_REGULATOR_REGISTER(AB8500_REGUCTRL2SPARE,         0x01, 0x00),
 286         /*
 287          * Vaux1Disch               = short discharge time
 288          * Vaux2Disch               = short discharge time
 289          * Vaux3Disch               = short discharge time
 290          * Vintcore12Disch          = short discharge time
 291          * VTVoutDisch              = short discharge time
 292          * VaudioDisch              = short discharge time
 293          */
 294         INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH,          0xfc, 0x00),
 295         /*
 296          * VanaDisch                = short discharge time
 297          * VdmicPullDownEna         = pulldown disabled when Vdmic is disabled
 298          * VdmicDisch               = short discharge time
 299          */
 300         INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH2,         0x16, 0x00),
 301 };
 302
 303 /* AB8500 regulators */
 304 static struct regulator_init_data ab8500_regulators[AB8500_NUM_REGULATORS] = {
 305         /* supplies to the display/camera */
 306         [AB8500_LDO_AUX1] = {
 307                 .supply_regulator = "ab8500-ext-supply3",
 308                 .constraints = {
 309                         .name = "V-DISPLAY",
 310                         .min_uV = 2800000,
 311                         .max_uV = 3300000,
 312                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 313                                           REGULATOR_CHANGE_STATUS,
 314                         .boot_on = 1, /* display is on at boot */
 315                 },
 316                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux1_consumers),
 317                 .consumer_supplies = ab8500_vaux1_consumers,
 318         },
 319         /* supplies to the on-board eMMC */
 320         [AB8500_LDO_AUX2] = {
 321                 .supply_regulator = "ab8500-ext-supply3",
 322                 .constraints = {
 323                         .name = "V-eMMC1",
 324                         .min_uV = 1100000,
 325                         .max_uV = 3300000,
 326                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 327                                           REGULATOR_CHANGE_STATUS |
 328                                           REGULATOR_CHANGE_MODE,
 329                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
 330                                             REGULATOR_MODE_IDLE,
 331                 },
 332                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux2_consumers),
 333                 .consumer_supplies = ab8500_vaux2_consumers,
 334         },
 335         /* supply for VAUX3, supplies to SDcard slots */
 336         [AB8500_LDO_AUX3] = {
 337                 .supply_regulator = "ab8500-ext-supply3",
 338                 .constraints = {
 339                         .name = "V-MMC-SD",
 340                         .min_uV = 1100000,
 341                         .max_uV = 3300000,
 342                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 343                                           REGULATOR_CHANGE_STATUS |
 344                                           REGULATOR_CHANGE_MODE,
 345                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
 346                                             REGULATOR_MODE_IDLE,
 347                 },
 348                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux3_consumers),
 349                 .consumer_supplies = ab8500_vaux3_consumers,
 350         },
 351         /* supply for tvout, gpadc, TVOUT LDO */
 352         [AB8500_LDO_TVOUT] = {
 353                 .constraints = {
 354                         .name = "V-TVOUT",
 355                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 356                 },
 357                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vtvout_consumers),
 358                 .consumer_supplies = ab8500_vtvout_consumers,
 359         },
 360         /* supply for ab8500-vaudio, VAUDIO LDO */
 361         [AB8500_LDO_AUDIO] = {
 362                 .constraints = {
 363                         .name = "V-AUD",
 364                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 365                 },
 366                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaud_consumers),
 367                 .consumer_supplies = ab8500_vaud_consumers,
 368         },
 369         /* supply for v-anamic1 VAMic1-LDO */
 370         [AB8500_LDO_ANAMIC1] = {
 371                 .constraints = {
 372                         .name = "V-AMIC1",
 373                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 374                 },
 375                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic1_consumers),
 376                 .consumer_supplies = ab8500_vamic1_consumers,
 377         },
 378         /* supply for v-amic2, VAMIC2 LDO, reuse constants for AMIC1 */
 379         [AB8500_LDO_ANAMIC2] = {
 380                 .constraints = {
 381                         .name = "V-AMIC2",
 382                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 383                 },
 384                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic2_consumers),
 385                 .consumer_supplies = ab8500_vamic2_consumers,
 386         },
 387         /* supply for v-dmic, VDMIC LDO */
 388         [AB8500_LDO_DMIC] = {
 389                 .constraints = {
 390                         .name = "V-DMIC",
 391                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 392                 },
 393                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vdmic_consumers),
 394                 .consumer_supplies = ab8500_vdmic_consumers,
 395         },
 396         /* supply for v-intcore12, VINTCORE12 LDO */
 397         [AB8500_LDO_INTCORE] = {
 398                 .constraints = {
 399                         .name = "V-INTCORE",
 400                         .min_uV = 1250000,
 401                         .max_uV = 1350000,
 402                         .input_uV = 1800000,
 403                         .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 404                                           REGULATOR_CHANGE_STATUS |
 405                                           REGULATOR_CHANGE_MODE |
 406                                           REGULATOR_CHANGE_DRMS,
 407                         .valid_modes_mask = REGULATOR_MODE_NORMAL |
 408                                             REGULATOR_MODE_IDLE,
 409                 },
 410                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vintcore_consumers),
 411                 .consumer_supplies = ab8500_vintcore_consumers,
 412         },
 413         /* supply for U8500 CSI-DSI, VANA LDO */
 414         [AB8500_LDO_ANA] = {
 415                 .constraints = {
 416                         .name = "V-CSI-DSI",
 417                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 418                 },
 419                 .num_consumer_supplies = ARRAY_SIZE(ab8500_vana_consumers),
 420                 .consumer_supplies = ab8500_vana_consumers,
 421         },
 422 };
 423
 424 /* supply for VextSupply3 */
 425 static struct regulator_consumer_supply ab8500_ext_supply3_consumers[] = {
 426         /* SIM supply for 3 V SIM cards */
 427         REGULATOR_SUPPLY("vinvsim", "sim-detect.0"),
 428 };
 429
 430 /*
 431  * AB8500 external regulators
 432  */
 433 static struct regulator_init_data ab8500_ext_regulators[] = {
 434         /* fixed Vbat supplies VSMPS1_EXT_1V8 */
 435         [AB8500_EXT_SUPPLY1] = {
 436                 .constraints = {
 437                         .name = "ab8500-ext-supply1",
 438                         .min_uV = 1800000,
 439                         .max_uV = 1800000,
 440                         .initial_mode = REGULATOR_MODE_IDLE,
 441                         .boot_on = 1,
 442                         .always_on = 1,
 443                 },
 444         },
 445         /* fixed Vbat supplies VSMPS2_EXT_1V36 and VSMPS5_EXT_1V15 */
 446         [AB8500_EXT_SUPPLY2] = {
 447                 .constraints = {
 448                         .name = "ab8500-ext-supply2",
 449                         .min_uV = 1360000,
 450                         .max_uV = 1360000,
 451                 },
 452         },
 453         /* fixed Vbat supplies VSMPS3_EXT_3V4 and VSMPS4_EXT_3V4 */
 454         [AB8500_EXT_SUPPLY3] = {
 455                 .constraints = {
 456                         .name = "ab8500-ext-supply3",
 457                         .min_uV = 3400000,
 458                         .max_uV = 3400000,
 459                         .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 460                         .boot_on = 1,
 461                 },
 462                 .num_consumer_supplies =
 463                         ARRAY_SIZE(ab8500_ext_supply3_consumers),
 464                 .consumer_supplies = ab8500_ext_supply3_consumers,
 465         },
 466 };
 467
 468 static struct ab8500_regulator_platform_data ab8500_regulator_plat_data = {
 469         .reg_init               = ab8500_reg_init,
 470         .num_reg_init           = ARRAY_SIZE(ab8500_reg_init),
 471         .regulator              = ab8500_regulators,
 472         .num_regulator          = ARRAY_SIZE(ab8500_regulators),
 473         .ext_regulator          = ab8500_ext_regulators,
 474         .num_ext_regulator      = ARRAY_SIZE(ab8500_ext_regulators),
 475 };
 476
 477 /**
 478  * struct ab8500_ext_regulator_info - ab8500 regulator information
 479  * @dev: device pointer
 480  * @desc: regulator description
 481  * @cfg: regulator configuration (extension of regulator FW configuration)
 482  * @update_bank: bank to control on/off
 483  * @update_reg: register to control on/off
 484  * @update_mask: mask to enable/disable and set mode of regulator
 485  * @update_val: bits holding the regulator current mode
 486  * @update_val_hp: bits to set EN pin active (LPn pin deactive)
 487  *                 normally this means high power mode
 488  * @update_val_lp: bits to set EN pin active and LPn pin active
 489  *                 normally this means low power mode
 490  * @update_val_hw: bits to set regulator pins in HW control
 491  *                 SysClkReq pins and logic will choose mode
 492  */
 493 struct ab8500_ext_regulator_info {
 494         struct device *dev;
 495         struct regulator_desc desc;
 496         struct ab8500_ext_regulator_cfg *cfg;
 497         u8 update_bank;
 498         u8 update_reg;
 499         u8 update_mask;
 500         u8 update_val;
 501         u8 update_val_hp;
 502         u8 update_val_lp;
 503         u8 update_val_hw;
 504 };
 505
 506 static int ab8500_ext_regulator_enable(struct regulator_dev *rdev)
 507 {
 508         int ret;
 509         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 510         u8 regval;
 511
 512         if (info == NULL) {
 513                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 514                 return -EINVAL;
 515         }
 516
 517         /*
 518          * To satisfy both HW high power request and SW request, the regulator
 519          * must be on in high power.
 520          */
 521         if (info->cfg && info->cfg->hwreq)
 522                 regval = info->update_val_hp;
 523         else
 524                 regval = info->update_val;
 525
 526         ret = abx500_mask_and_set_register_interruptible(info->dev,
 527                 info->update_bank, info->update_reg,
 528                 info->update_mask, regval);
 529         if (ret < 0) {
 530                 dev_err(rdev_get_dev(rdev),
 531                         "couldn't set enable bits for regulator\n");
 532                 return ret;
 533         }
 534
 535         dev_dbg(rdev_get_dev(rdev),
 536                 "%s-enable (bank, reg, mask, value): 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 537                 info->desc.name, info->update_bank, info->update_reg,
 538                 info->update_mask, regval);
 539
 540         return 0;
 541 }
 542
 543 static int ab8500_ext_regulator_disable(struct regulator_dev *rdev)
 544 {
 545         int ret;
 546         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 547         u8 regval;
 548
 549         if (info == NULL) {
 550                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 551                 return -EINVAL;
 552         }
 553
 554         /*
 555          * Set the regulator in HW request mode if configured
 556          */
 557         if (info->cfg && info->cfg->hwreq)
 558                 regval = info->update_val_hw;
 559         else
 560                 regval = 0;
 561
 562         ret = abx500_mask_and_set_register_interruptible(info->dev,
 563                 info->update_bank, info->update_reg,
 564                 info->update_mask, regval);
 565         if (ret < 0) {
 566                 dev_err(rdev_get_dev(rdev),
 567                         "couldn't set disable bits for regulator\n");
 568                 return ret;
 569         }
 570
 571         dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):"
 572                 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 573                 info->desc.name, info->update_bank, info->update_reg,
 574                 info->update_mask, regval);
 575
 576         return 0;
 577 }
 578
 579 static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
 580 {
 581         int ret;
 582         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 583         u8 regval;
 584
 585         if (info == NULL) {
 586                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 587                 return -EINVAL;
 588         }
 589
 590         ret = abx500_get_register_interruptible(info->dev,
 591                 info->update_bank, info->update_reg, &regval);
 592         if (ret < 0) {
 593                 dev_err(rdev_get_dev(rdev),
 594                         "couldn't read 0x%x register\n", info->update_reg);
 595                 return ret;
 596         }
 597
 598         dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):"
 599                 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 600                 info->desc.name, info->update_bank, info->update_reg,
 601                 info->update_mask, regval);
 602
 603         if (((regval & info->update_mask) == info->update_val_lp) ||
 604             ((regval & info->update_mask) == info->update_val_hp))
 605                 return 1;
 606         else
 607                 return 0;
 608 }
 609
 610 static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
 611                                          unsigned int mode)
 612 {
 613         int ret = 0;
 614         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 615         u8 regval;
 616
 617         if (info == NULL) {
 618                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 619                 return -EINVAL;
 620         }
 621
 622         switch (mode) {
 623         case REGULATOR_MODE_NORMAL:
 624                 regval = info->update_val_hp;
 625                 break;
 626         case REGULATOR_MODE_IDLE:
 627                 regval = info->update_val_lp;
 628                 break;
 629
 630         default:
 631                 return -EINVAL;
 632         }
 633
 634         /* If regulator is enabled and info->cfg->hwreq is set, the regulator
 635            must be on in high power, so we don't need to write the register with
 636            the same value.
 637          */
 638         if (ab8500_ext_regulator_is_enabled(rdev) &&
 639             !(info->cfg && info->cfg->hwreq)) {
 640                 ret = abx500_mask_and_set_register_interruptible(info->dev,
 641                                         info->update_bank, info->update_reg,
 642                                         info->update_mask, regval);
 643                 if (ret < 0) {
 644                         dev_err(rdev_get_dev(rdev),
 645                                 "Could not set regulator mode.\n");
 646                         return ret;
 647                 }
 648
 649                 dev_dbg(rdev_get_dev(rdev),
 650                         "%s-set_mode (bank, reg, mask, value): "
 651                         "0x%x, 0x%x, 0x%x, 0x%x\n",
 652                         info->desc.name, info->update_bank, info->update_reg,
 653                         info->update_mask, regval);
 654         }
 655
 656         info->update_val = regval;
 657
 658         return 0;
 659 }
 660
 661 static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
 662 {
 663         struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
 664         int ret;
 665
 666         if (info == NULL) {
 667                 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
 668                 return -EINVAL;
 669         }
 670
 671         if (info->update_val == info->update_val_hp)
 672                 ret = REGULATOR_MODE_NORMAL;
 673         else if (info->update_val == info->update_val_lp)
 674                 ret = REGULATOR_MODE_IDLE;
 675         else
 676                 ret = -EINVAL;
 677
 678         return ret;
 679 }
 680
 681 static int ab8500_ext_set_voltage(struct regulator_dev *rdev, int min_uV,
 682                                   int max_uV, unsigned *selector)
 683 {
 684         struct regulation_constraints *regu_constraints = rdev->constraints;
 685
 686         if (!regu_constraints) {
 687                 dev_err(rdev_get_dev(rdev), "No regulator constraints\n");
 688                 return -EINVAL;
 689         }
 690
 691         if (regu_constraints->min_uV == min_uV &&
 692             regu_constraints->max_uV == max_uV)
 693                 return 0;
 694
 695         dev_err(rdev_get_dev(rdev),
 696                 "Requested min %duV max %duV != constrained min %duV max %duV\n",
 697                 min_uV, max_uV,
 698                 regu_constraints->min_uV, regu_constraints->max_uV);
 699
 700         return -EINVAL;
 701 }
 702
 703 static int ab8500_ext_list_voltage(struct regulator_dev *rdev,
 704                                    unsigned selector)
 705 {
 706         struct regulation_constraints *regu_constraints = rdev->constraints;
 707
 708         if (regu_constraints == NULL) {
 709                 dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
 710                 return -EINVAL;
 711         }
 712         /* return the uV for the fixed regulators */
 713         if (regu_constraints->min_uV && regu_constraints->max_uV) {
 714                 if (regu_constraints->min_uV == regu_constraints->max_uV)
 715                         return regu_constraints->min_uV;
 716         }
 717         return -EINVAL;
 718 }
 719
 720 static const struct regulator_ops ab8500_ext_regulator_ops = {
 721         .enable                 = ab8500_ext_regulator_enable,
 722         .disable                = ab8500_ext_regulator_disable,
 723         .is_enabled             = ab8500_ext_regulator_is_enabled,
 724         .set_mode               = ab8500_ext_regulator_set_mode,
 725         .get_mode               = ab8500_ext_regulator_get_mode,
 726         .set_voltage            = ab8500_ext_set_voltage,
 727         .list_voltage           = ab8500_ext_list_voltage,
 728 };
 729
 730 static struct ab8500_ext_regulator_info
 731                 ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = {
 732         [AB8500_EXT_SUPPLY1] = {
 733                 .desc = {
 734                         .name           = "VEXTSUPPLY1",
 735                         .of_match       = of_match_ptr("ab8500_ext1"),
 736                         .ops            = &ab8500_ext_regulator_ops,
 737                         .type           = REGULATOR_VOLTAGE,
 738                         .id             = AB8500_EXT_SUPPLY1,
 739                         .owner          = THIS_MODULE,
 740                         .n_voltages     = 1,
 741                 },
 742                 .update_bank            = 0x04,
 743                 .update_reg             = 0x08,
 744                 .update_mask            = 0x03,
 745                 .update_val             = 0x01,
 746                 .update_val_hp          = 0x01,
 747                 .update_val_lp          = 0x03,
 748                 .update_val_hw          = 0x02,
 749         },
 750         [AB8500_EXT_SUPPLY2] = {
 751                 .desc = {
 752                         .name           = "VEXTSUPPLY2",
 753                         .of_match       = of_match_ptr("ab8500_ext2"),
 754                         .ops            = &ab8500_ext_regulator_ops,
 755                         .type           = REGULATOR_VOLTAGE,
 756                         .id             = AB8500_EXT_SUPPLY2,
 757                         .owner          = THIS_MODULE,
 758                         .n_voltages     = 1,
 759                 },
 760                 .update_bank            = 0x04,
 761                 .update_reg             = 0x08,
 762                 .update_mask            = 0x0c,
 763                 .update_val             = 0x04,
 764                 .update_val_hp          = 0x04,
 765                 .update_val_lp          = 0x0c,
 766                 .update_val_hw          = 0x08,
 767         },
 768         [AB8500_EXT_SUPPLY3] = {
 769                 .desc = {
 770                         .name           = "VEXTSUPPLY3",
 771                         .of_match       = of_match_ptr("ab8500_ext3"),
 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 int ab8500_ext_regulator_probe(struct platform_device *pdev)
 789 {
 790         struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
 791         struct ab8500_regulator_platform_data *pdata = &ab8500_regulator_plat_data;
 792         struct regulator_config config = { };
 793         struct regulator_dev *rdev;
 794         int i;
 795
 796         if (!ab8500) {
 797                 dev_err(&pdev->dev, "null mfd parent\n");
 798                 return -EINVAL;
 799         }
 800
 801         /* make sure the platform data has the correct size */
 802         if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
 803                 dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
 804                 return -EINVAL;
 805         }
 806
 807         /* check for AB8500 2.x */
 808         if (is_ab8500_2p0_or_earlier(ab8500)) {
 809                 struct ab8500_ext_regulator_info *info;
 810
 811                 /* VextSupply3LPn is inverted on AB8500 2.x */
 812                 info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3];
 813                 info->update_val = 0x30;
 814                 info->update_val_hp = 0x30;
 815                 info->update_val_lp = 0x10;
 816         }
 817
 818         /* register all regulators */
 819         for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
 820                 struct ab8500_ext_regulator_info *info = NULL;
 821
 822                 /* assign per-regulator data */
 823                 info = &ab8500_ext_regulator_info[i];
 824                 info->dev = &pdev->dev;
 825                 info->cfg = (struct ab8500_ext_regulator_cfg *)
 826                         pdata->ext_regulator[i].driver_data;
 827
 828                 config.dev = &pdev->dev;
 829                 config.driver_data = info;
 830                 config.init_data = &pdata->ext_regulator[i];
 831
 832                 /* register regulator with framework */
 833                 rdev = devm_regulator_register(&pdev->dev, &info->desc,
 834                                                &config);
 835                 if (IS_ERR(rdev)) {
 836                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 837                                         info->desc.name);
 838                         return PTR_ERR(rdev);
 839                 }
 840
 841                 dev_dbg(&pdev->dev, "%s-probed\n", info->desc.name);
 842         }
 843
 844         return 0;
 845 }
 846
 847 static struct platform_driver ab8500_ext_regulator_driver = {
 848         .probe = ab8500_ext_regulator_probe,
 849         .driver         = {
 850                 .name   = "ab8500-ext-regulator",
 851         },
 852 };
 853
 854 static int __init ab8500_ext_regulator_init(void)
 855 {
 856         int ret;
 857
 858         ret = platform_driver_register(&ab8500_ext_regulator_driver);
 859         if (ret)
 860                 pr_err("Failed to register ab8500 ext regulator: %d\n", ret);
 861
 862         return ret;
 863 }
 864 subsys_initcall(ab8500_ext_regulator_init);
 865
 866 static void __exit ab8500_ext_regulator_exit(void)
 867 {
 868         platform_driver_unregister(&ab8500_ext_regulator_driver);
 869 }
 870 module_exit(ab8500_ext_regulator_exit);
 871
 872 MODULE_LICENSE("GPL v2");
 873 MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>");
 874 MODULE_DESCRIPTION("AB8500 external regulator driver");
 875 MODULE_ALIAS("platform:ab8500-ext-regulator");