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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Regulator driver for TI TPS6586x4 *5 * Copyright (C) 2010 Compulab Ltd.6 * Author: Mike Rapoport <mike@compulab.co.il>7 *8 * Based on da903x9 * Copyright (C) 2006-2008 Marvell International Ltd.10 * Copyright (C) 2008 Compulab Ltd.11 */12 13#include <linux/kernel.h>14#include <linux/module.h>15#include <linux/init.h>16#include <linux/err.h>17#include <linux/of.h>18#include <linux/slab.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/tps6586x.h>24 25/* supply control and voltage setting */26#define TPS6586X_SUPPLYENA 0x1027#define TPS6586X_SUPPLYENB 0x1128#define TPS6586X_SUPPLYENC 0x1229#define TPS6586X_SUPPLYEND 0x1330#define TPS6586X_SUPPLYENE 0x1431#define TPS6586X_VCC1 0x2032#define TPS6586X_VCC2 0x2133#define TPS6586X_SM1V1 0x2334#define TPS6586X_SM1V2 0x2435#define TPS6586X_SM1SL 0x2536#define TPS6586X_SM0V1 0x2637#define TPS6586X_SM0V2 0x2738#define TPS6586X_SM0SL 0x2839#define TPS6586X_LDO2AV1 0x2940#define TPS6586X_LDO2AV2 0x2A41#define TPS6586X_LDO2BV1 0x2F42#define TPS6586X_LDO2BV2 0x3043#define TPS6586X_LDO4V1 0x3244#define TPS6586X_LDO4V2 0x3345 46/* converter settings */47#define TPS6586X_SUPPLYV1 0x4148#define TPS6586X_SUPPLYV2 0x4249#define TPS6586X_SUPPLYV3 0x4350#define TPS6586X_SUPPLYV4 0x4451#define TPS6586X_SUPPLYV5 0x4552#define TPS6586X_SUPPLYV6 0x4653#define TPS6586X_SMODE1 0x4754#define TPS6586X_SMODE2 0x4855 56struct tps6586x_regulator {57 struct regulator_desc desc;58 59 int enable_bit[2];60 int enable_reg[2];61};62 63static const struct regulator_ops tps6586x_rw_regulator_ops = {64 .list_voltage = regulator_list_voltage_table,65 .map_voltage = regulator_map_voltage_ascend,66 .get_voltage_sel = regulator_get_voltage_sel_regmap,67 .set_voltage_sel = regulator_set_voltage_sel_regmap,68 69 .is_enabled = regulator_is_enabled_regmap,70 .enable = regulator_enable_regmap,71 .disable = regulator_disable_regmap,72};73 74static const struct regulator_ops tps6586x_rw_linear_regulator_ops = {75 .list_voltage = regulator_list_voltage_linear,76 .get_voltage_sel = regulator_get_voltage_sel_regmap,77 .set_voltage_sel = regulator_set_voltage_sel_regmap,78 79 .is_enabled = regulator_is_enabled_regmap,80 .enable = regulator_enable_regmap,81 .disable = regulator_disable_regmap,82};83 84static const struct regulator_ops tps6586x_ro_regulator_ops = {85 .list_voltage = regulator_list_voltage_table,86 .map_voltage = regulator_map_voltage_ascend,87 .get_voltage_sel = regulator_get_voltage_sel_regmap,88 89 .is_enabled = regulator_is_enabled_regmap,90 .enable = regulator_enable_regmap,91 .disable = regulator_disable_regmap,92};93 94static const struct regulator_ops tps6586x_sys_regulator_ops = {95};96 97static const unsigned int tps6586x_ldo0_voltages[] = {98 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,99};100 101static const unsigned int tps6586x_ldo_voltages[] = {102 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,103};104 105static const unsigned int tps658640_rtc_voltages[] = {106 2500000, 2850000, 3100000, 3300000,107};108 109#define TPS6586X_REGULATOR(_id, _ops, _pin_name, vdata, vreg, shift, nbits, \110 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \111 .desc = { \112 .supply_name = _pin_name, \113 .name = "REG-" #_id, \114 .ops = &tps6586x_## _ops ## _regulator_ops, \115 .type = REGULATOR_VOLTAGE, \116 .id = TPS6586X_ID_##_id, \117 .n_voltages = ARRAY_SIZE(vdata##_voltages), \118 .volt_table = vdata##_voltages, \119 .owner = THIS_MODULE, \120 .enable_reg = TPS6586X_SUPPLY##ereg0, \121 .enable_mask = 1 << (ebit0), \122 .vsel_reg = TPS6586X_##vreg, \123 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \124 .apply_reg = (goreg), \125 .apply_bit = (gobit), \126 }, \127 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \128 .enable_bit[0] = (ebit0), \129 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \130 .enable_bit[1] = (ebit1),131 132#define TPS6586X_REGULATOR_LINEAR(_id, _ops, _pin_name, n_volt, min_uv, \133 uv_step, vreg, shift, nbits, ereg0, \134 ebit0, ereg1, ebit1, goreg, gobit) \135 .desc = { \136 .supply_name = _pin_name, \137 .name = "REG-" #_id, \138 .ops = &tps6586x_## _ops ## _regulator_ops, \139 .type = REGULATOR_VOLTAGE, \140 .id = TPS6586X_ID_##_id, \141 .n_voltages = n_volt, \142 .min_uV = min_uv, \143 .uV_step = uv_step, \144 .owner = THIS_MODULE, \145 .enable_reg = TPS6586X_SUPPLY##ereg0, \146 .enable_mask = 1 << (ebit0), \147 .vsel_reg = TPS6586X_##vreg, \148 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \149 .apply_reg = (goreg), \150 .apply_bit = (gobit), \151 }, \152 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \153 .enable_bit[0] = (ebit0), \154 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \155 .enable_bit[1] = (ebit1),156 157#define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \158 ereg0, ebit0, ereg1, ebit1) \159{ \160 TPS6586X_REGULATOR(_id, rw, _pname, vdata, vreg, shift, nbits, \161 ereg0, ebit0, ereg1, ebit1, 0, 0) \162}163 164#define TPS6586X_LDO_LINEAR(_id, _pname, n_volt, min_uv, uv_step, vreg, \165 shift, nbits, ereg0, ebit0, ereg1, ebit1) \166{ \167 TPS6586X_REGULATOR_LINEAR(_id, rw_linear, _pname, n_volt, \168 min_uv, uv_step, vreg, shift, nbits, \169 ereg0, ebit0, ereg1, ebit1, 0, 0) \170}171 172#define TPS6586X_FIXED_LDO(_id, _pname, vdata, vreg, shift, nbits, \173 ereg0, ebit0, ereg1, ebit1) \174{ \175 TPS6586X_REGULATOR(_id, ro, _pname, vdata, vreg, shift, nbits, \176 ereg0, ebit0, ereg1, ebit1, 0, 0) \177}178 179#define TPS6586X_DVM(_id, _pname, n_volt, min_uv, uv_step, vreg, shift, \180 nbits, ereg0, ebit0, ereg1, ebit1, goreg, gobit) \181{ \182 TPS6586X_REGULATOR_LINEAR(_id, rw_linear, _pname, n_volt, \183 min_uv, uv_step, vreg, shift, nbits, \184 ereg0, ebit0, ereg1, ebit1, goreg, \185 gobit) \186}187 188#define TPS6586X_SYS_REGULATOR() \189{ \190 .desc = { \191 .supply_name = "sys", \192 .name = "REG-SYS", \193 .ops = &tps6586x_sys_regulator_ops, \194 .type = REGULATOR_VOLTAGE, \195 .id = TPS6586X_ID_SYS, \196 .owner = THIS_MODULE, \197 }, \198}199 200static struct tps6586x_regulator tps6586x_regulator[] = {201 TPS6586X_SYS_REGULATOR(),202 TPS6586X_LDO(LDO_0, "vinldo01", tps6586x_ldo0, SUPPLYV1, 5, 3, ENC, 0,203 END, 0),204 TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo, SUPPLYV4, 0, 3, ENC, 2,205 END, 2),206 TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo, SUPPLYV6, 0, 3, ENE, 6,207 ENE, 6),208 TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo, SUPPLYV3, 0, 3, ENC, 4,209 END, 4),210 TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo, SUPPLYV3, 3, 3, ENC, 5,211 END, 5),212 TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo, SUPPLYV2, 5, 3, ENC, 6,213 END, 6),214 TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo, SUPPLYV6, 3, 3, ENE, 7,215 ENE, 7),216 TPS6586X_LDO(LDO_RTC, "REG-SYS", tps6586x_ldo, SUPPLYV4, 3, 3, V4, 7,217 V4, 7),218 TPS6586X_LDO_LINEAR(LDO_1, "vinldo01", 32, 725000, 25000, SUPPLYV1,219 0, 5, ENC, 1, END, 1),220 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 3000000, 50000, SUPPLYV2,221 0, 5, ENC, 7, END, 7),222 TPS6586X_DVM(LDO_2, "vinldo23", 32, 725000, 25000, LDO2BV1, 0, 5,223 ENA, 3, ENB, 3, TPS6586X_VCC2, BIT(6)),224 TPS6586X_DVM(LDO_4, "vinldo4", 32, 1700000, 25000, LDO4V1, 0, 5,225 ENC, 3, END, 3, TPS6586X_VCC1, BIT(6)),226 TPS6586X_DVM(SM_0, "vin-sm0", 32, 725000, 25000, SM0V1, 0, 5,227 ENA, 1, ENB, 1, TPS6586X_VCC1, BIT(2)),228 TPS6586X_DVM(SM_1, "vin-sm1", 32, 725000, 25000, SM1V1, 0, 5,229 ENA, 0, ENB, 0, TPS6586X_VCC1, BIT(0)),230};231 232static struct tps6586x_regulator tps658623_regulator[] = {233 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 1700000, 25000, SUPPLYV2,234 0, 5, ENC, 7, END, 7),235};236 237static struct tps6586x_regulator tps658640_regulator[] = {238 TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo0, SUPPLYV4, 0, 3,239 ENC, 2, END, 2),240 TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo0, SUPPLYV6, 0, 3,241 ENE, 6, ENE, 6),242 TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo0, SUPPLYV3, 0, 3,243 ENC, 4, END, 4),244 TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo0, SUPPLYV3, 3, 3,245 ENC, 5, END, 5),246 TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo0, SUPPLYV2, 5, 3,247 ENC, 6, END, 6),248 TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo0, SUPPLYV6, 3, 3,249 ENE, 7, ENE, 7),250 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 2150000, 50000, SUPPLYV2,251 0, 5, ENC, 7, END, 7),252 253 TPS6586X_FIXED_LDO(LDO_RTC, "REG-SYS", tps658640_rtc, SUPPLYV4, 3, 2,254 V4, 7, V4, 7),255};256 257static struct tps6586x_regulator tps658643_regulator[] = {258 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 1025000, 25000, SUPPLYV2,259 0, 5, ENC, 7, END, 7),260};261 262/*263 * TPS6586X has 2 enable bits that are OR'ed to determine the actual264 * regulator state. Clearing one of this bits allows switching265 * regulator on and of with single register write.266 */267static inline int tps6586x_regulator_preinit(struct device *parent,268 struct tps6586x_regulator *ri)269{270 uint8_t val1, val2;271 int ret;272 273 if (ri->enable_reg[0] == ri->enable_reg[1] &&274 ri->enable_bit[0] == ri->enable_bit[1])275 return 0;276 277 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);278 if (ret)279 return ret;280 281 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);282 if (ret)283 return ret;284 285 if (!(val2 & (1 << ri->enable_bit[1])))286 return 0;287 288 /*289 * The regulator is on, but it's enabled with the bit we don't290 * want to use, so we switch the enable bits291 */292 if (!(val1 & (1 << ri->enable_bit[0]))) {293 ret = tps6586x_set_bits(parent, ri->enable_reg[0],294 1 << ri->enable_bit[0]);295 if (ret)296 return ret;297 }298 299 return tps6586x_clr_bits(parent, ri->enable_reg[1],300 1 << ri->enable_bit[1]);301}302 303static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,304 int id, struct regulator_init_data *p)305{306 struct device *parent = pdev->dev.parent;307 struct tps6586x_settings *setting = p->driver_data;308 uint8_t reg;309 310 if (setting == NULL)311 return 0;312 313 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))314 return 0;315 316 /* only SM0 and SM1 can have the slew rate settings */317 switch (id) {318 case TPS6586X_ID_SM_0:319 reg = TPS6586X_SM0SL;320 break;321 case TPS6586X_ID_SM_1:322 reg = TPS6586X_SM1SL;323 break;324 default:325 dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n");326 return -EINVAL;327 }328 329 return tps6586x_write(parent, reg,330 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);331}332 333static struct tps6586x_regulator *find_regulator_info(int id, int version)334{335 struct tps6586x_regulator *ri;336 struct tps6586x_regulator *table = NULL;337 int num;338 int i;339 340 switch (version) {341 case TPS658623:342 case TPS658624:343 table = tps658623_regulator;344 num = ARRAY_SIZE(tps658623_regulator);345 break;346 case TPS658640:347 case TPS658640v2:348 table = tps658640_regulator;349 num = ARRAY_SIZE(tps658640_regulator);350 break;351 case TPS658643:352 table = tps658643_regulator;353 num = ARRAY_SIZE(tps658643_regulator);354 break;355 }356 357 /* Search version specific table first */358 if (table) {359 for (i = 0; i < num; i++) {360 ri = &table[i];361 if (ri->desc.id == id)362 return ri;363 }364 }365 366 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {367 ri = &tps6586x_regulator[i];368 if (ri->desc.id == id)369 return ri;370 }371 return NULL;372}373 374#ifdef CONFIG_OF375static struct of_regulator_match tps6586x_matches[] = {376 { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },377 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },378 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },379 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },380 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },381 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },382 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },383 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },384 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },385 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },386 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },387 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },388 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },389 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },390 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },391};392 393static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(394 struct platform_device *pdev,395 struct of_regulator_match **tps6586x_reg_matches)396{397 const unsigned int num = ARRAY_SIZE(tps6586x_matches);398 struct device_node *np = pdev->dev.parent->of_node;399 struct device_node *regs;400 const char *sys_rail = NULL;401 unsigned int i;402 struct tps6586x_platform_data *pdata;403 int err;404 405 regs = of_get_child_by_name(np, "regulators");406 if (!regs) {407 dev_err(&pdev->dev, "regulator node not found\n");408 return NULL;409 }410 411 err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);412 of_node_put(regs);413 if (err < 0) {414 dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);415 return NULL;416 }417 418 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);419 if (!pdata)420 return NULL;421 422 for (i = 0; i < num; i++) {423 uintptr_t id;424 if (!tps6586x_matches[i].init_data)425 continue;426 427 pdata->reg_init_data[i] = tps6586x_matches[i].init_data;428 id = (uintptr_t)tps6586x_matches[i].driver_data;429 if (id == TPS6586X_ID_SYS)430 sys_rail = pdata->reg_init_data[i]->constraints.name;431 432 if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))433 pdata->reg_init_data[i]->supply_regulator = sys_rail;434 }435 *tps6586x_reg_matches = tps6586x_matches;436 return pdata;437}438#else439static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(440 struct platform_device *pdev,441 struct of_regulator_match **tps6586x_reg_matches)442{443 *tps6586x_reg_matches = NULL;444 return NULL;445}446#endif447 448static int tps6586x_regulator_probe(struct platform_device *pdev)449{450 struct tps6586x_regulator *ri = NULL;451 struct regulator_config config = { };452 struct regulator_dev *rdev;453 struct regulator_init_data *reg_data;454 struct tps6586x_platform_data *pdata;455 struct of_regulator_match *tps6586x_reg_matches = NULL;456 int version;457 int id;458 int err;459 460 dev_dbg(&pdev->dev, "Probing regulator\n");461 462 pdata = dev_get_platdata(pdev->dev.parent);463 if ((!pdata) && (pdev->dev.parent->of_node))464 pdata = tps6586x_parse_regulator_dt(pdev,465 &tps6586x_reg_matches);466 467 if (!pdata) {468 dev_err(&pdev->dev, "Platform data not available, exiting\n");469 return -ENODEV;470 }471 472 version = tps6586x_get_version(pdev->dev.parent);473 474 for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {475 reg_data = pdata->reg_init_data[id];476 477 ri = find_regulator_info(id, version);478 479 if (!ri) {480 dev_err(&pdev->dev, "invalid regulator ID specified\n");481 return -EINVAL;482 }483 484 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);485 if (err) {486 dev_err(&pdev->dev,487 "regulator %d preinit failed, e %d\n", id, err);488 return err;489 }490 491 config.dev = pdev->dev.parent;492 config.init_data = reg_data;493 config.driver_data = ri;494 495 if (tps6586x_reg_matches)496 config.of_node = tps6586x_reg_matches[id].of_node;497 498 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);499 if (IS_ERR(rdev)) {500 dev_err(&pdev->dev, "failed to register regulator %s\n",501 ri->desc.name);502 return PTR_ERR(rdev);503 }504 505 if (reg_data) {506 err = tps6586x_regulator_set_slew_rate(pdev, id,507 reg_data);508 if (err < 0) {509 dev_err(&pdev->dev,510 "Slew rate config failed, e %d\n", err);511 return err;512 }513 }514 }515 516 platform_set_drvdata(pdev, rdev);517 return 0;518}519 520static struct platform_driver tps6586x_regulator_driver = {521 .driver = {522 .name = "tps6586x-regulator",523 .probe_type = PROBE_PREFER_ASYNCHRONOUS,524 },525 .probe = tps6586x_regulator_probe,526};527 528static int __init tps6586x_regulator_init(void)529{530 return platform_driver_register(&tps6586x_regulator_driver);531}532subsys_initcall(tps6586x_regulator_init);533 534static void __exit tps6586x_regulator_exit(void)535{536 platform_driver_unregister(&tps6586x_regulator_driver);537}538module_exit(tps6586x_regulator_exit);539 540MODULE_LICENSE("GPL");541MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");542MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");543MODULE_ALIAS("platform:tps6586x-regulator");544