367 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Broadcom BCM590xx regulator driver4 *5 * Copyright 2014 Linaro Limited6 * Author: Matt Porter <mporter@linaro.org>7 */8 9#include <linux/err.h>10#include <linux/init.h>11#include <linux/kernel.h>12#include <linux/mfd/bcm590xx.h>13#include <linux/module.h>14#include <linux/of.h>15#include <linux/platform_device.h>16#include <linux/regulator/driver.h>17#include <linux/regulator/machine.h>18#include <linux/regulator/of_regulator.h>19#include <linux/slab.h>20 21/* I2C slave 0 registers */22#define BCM590XX_RFLDOPMCTRL1 0x6023#define BCM590XX_IOSR1PMCTRL1 0x7a24#define BCM590XX_IOSR2PMCTRL1 0x7c25#define BCM590XX_CSRPMCTRL1 0x7e26#define BCM590XX_SDSR1PMCTRL1 0x8227#define BCM590XX_SDSR2PMCTRL1 0x8628#define BCM590XX_MSRPMCTRL1 0x8a29#define BCM590XX_VSRPMCTRL1 0x8e30#define BCM590XX_RFLDOCTRL 0x9631#define BCM590XX_CSRVOUT1 0xc032 33/* I2C slave 1 registers */34#define BCM590XX_GPLDO5PMCTRL1 0x1635#define BCM590XX_GPLDO6PMCTRL1 0x1836#define BCM590XX_GPLDO1CTRL 0x1a37#define BCM590XX_GPLDO2CTRL 0x1b38#define BCM590XX_GPLDO3CTRL 0x1c39#define BCM590XX_GPLDO4CTRL 0x1d40#define BCM590XX_GPLDO5CTRL 0x1e41#define BCM590XX_GPLDO6CTRL 0x1f42#define BCM590XX_OTG_CTRL 0x4043#define BCM590XX_GPLDO1PMCTRL1 0x5744#define BCM590XX_GPLDO2PMCTRL1 0x5945#define BCM590XX_GPLDO3PMCTRL1 0x5b46#define BCM590XX_GPLDO4PMCTRL1 0x5d47 48#define BCM590XX_REG_ENABLE BIT(7)49#define BCM590XX_VBUS_ENABLE BIT(2)50#define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3)51#define BCM590XX_SR_VSEL_MASK GENMASK(5, 0)52 53/*54 * RFLDO to VSR regulators are55 * accessed via I2C slave 056 */57 58/* LDO regulator IDs */59#define BCM590XX_REG_RFLDO 060#define BCM590XX_REG_CAMLDO1 161#define BCM590XX_REG_CAMLDO2 262#define BCM590XX_REG_SIMLDO1 363#define BCM590XX_REG_SIMLDO2 464#define BCM590XX_REG_SDLDO 565#define BCM590XX_REG_SDXLDO 666#define BCM590XX_REG_MMCLDO1 767#define BCM590XX_REG_MMCLDO2 868#define BCM590XX_REG_AUDLDO 969#define BCM590XX_REG_MICLDO 1070#define BCM590XX_REG_USBLDO 1171#define BCM590XX_REG_VIBLDO 1272 73/* DCDC regulator IDs */74#define BCM590XX_REG_CSR 1375#define BCM590XX_REG_IOSR1 1476#define BCM590XX_REG_IOSR2 1577#define BCM590XX_REG_MSR 1678#define BCM590XX_REG_SDSR1 1779#define BCM590XX_REG_SDSR2 1880#define BCM590XX_REG_VSR 1981 82/*83 * GPLDO1 to VBUS regulators are84 * accessed via I2C slave 185 */86 87#define BCM590XX_REG_GPLDO1 2088#define BCM590XX_REG_GPLDO2 2189#define BCM590XX_REG_GPLDO3 2290#define BCM590XX_REG_GPLDO4 2391#define BCM590XX_REG_GPLDO5 2492#define BCM590XX_REG_GPLDO6 2593#define BCM590XX_REG_VBUS 2694 95#define BCM590XX_NUM_REGS 2796 97#define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR)98#define BCM590XX_REG_IS_GPLDO(n) \99 ((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))100#define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS)101 102/* LDO group A: supported voltages in microvolts */103static const unsigned int ldo_a_table[] = {104 1200000, 1800000, 2500000, 2700000, 2800000,105 2900000, 3000000, 3300000,106};107 108/* LDO group C: supported voltages in microvolts */109static const unsigned int ldo_c_table[] = {110 3100000, 1800000, 2500000, 2700000, 2800000,111 2900000, 3000000, 3300000,112};113 114static const unsigned int ldo_vbus[] = {115 5000000,116};117 118/* DCDC group CSR: supported voltages in microvolts */119static const struct linear_range dcdc_csr_ranges[] = {120 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),121 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),122 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),123};124 125/* DCDC group IOSR1: supported voltages in microvolts */126static const struct linear_range dcdc_iosr1_ranges[] = {127 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),128 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),129 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),130 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),131};132 133/* DCDC group SDSR1: supported voltages in microvolts */134static const struct linear_range dcdc_sdsr1_ranges[] = {135 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),136 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),137 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),138};139 140struct bcm590xx_info {141 const char *name;142 const char *vin_name;143 u8 n_voltages;144 const unsigned int *volt_table;145 u8 n_linear_ranges;146 const struct linear_range *linear_ranges;147};148 149#define BCM590XX_REG_TABLE(_name, _table) \150 { \151 .name = #_name, \152 .n_voltages = ARRAY_SIZE(_table), \153 .volt_table = _table, \154 }155 156#define BCM590XX_REG_RANGES(_name, _ranges) \157 { \158 .name = #_name, \159 .n_voltages = 64, \160 .n_linear_ranges = ARRAY_SIZE(_ranges), \161 .linear_ranges = _ranges, \162 }163 164static struct bcm590xx_info bcm590xx_regs[] = {165 BCM590XX_REG_TABLE(rfldo, ldo_a_table),166 BCM590XX_REG_TABLE(camldo1, ldo_c_table),167 BCM590XX_REG_TABLE(camldo2, ldo_c_table),168 BCM590XX_REG_TABLE(simldo1, ldo_a_table),169 BCM590XX_REG_TABLE(simldo2, ldo_a_table),170 BCM590XX_REG_TABLE(sdldo, ldo_c_table),171 BCM590XX_REG_TABLE(sdxldo, ldo_a_table),172 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),173 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),174 BCM590XX_REG_TABLE(audldo, ldo_a_table),175 BCM590XX_REG_TABLE(micldo, ldo_a_table),176 BCM590XX_REG_TABLE(usbldo, ldo_a_table),177 BCM590XX_REG_TABLE(vibldo, ldo_c_table),178 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),179 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),180 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),181 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),182 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),183 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),184 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),185 BCM590XX_REG_TABLE(gpldo1, ldo_a_table),186 BCM590XX_REG_TABLE(gpldo2, ldo_a_table),187 BCM590XX_REG_TABLE(gpldo3, ldo_a_table),188 BCM590XX_REG_TABLE(gpldo4, ldo_a_table),189 BCM590XX_REG_TABLE(gpldo5, ldo_a_table),190 BCM590XX_REG_TABLE(gpldo6, ldo_a_table),191 BCM590XX_REG_TABLE(vbus, ldo_vbus),192};193 194struct bcm590xx_reg {195 struct regulator_desc *desc;196 struct bcm590xx *mfd;197};198 199static int bcm590xx_get_vsel_register(int id)200{201 if (BCM590XX_REG_IS_LDO(id))202 return BCM590XX_RFLDOCTRL + id;203 else if (BCM590XX_REG_IS_GPLDO(id))204 return BCM590XX_GPLDO1CTRL + id;205 else206 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;207}208 209static int bcm590xx_get_enable_register(int id)210{211 int reg = 0;212 213 if (BCM590XX_REG_IS_LDO(id))214 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;215 else if (BCM590XX_REG_IS_GPLDO(id))216 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;217 else218 switch (id) {219 case BCM590XX_REG_CSR:220 reg = BCM590XX_CSRPMCTRL1;221 break;222 case BCM590XX_REG_IOSR1:223 reg = BCM590XX_IOSR1PMCTRL1;224 break;225 case BCM590XX_REG_IOSR2:226 reg = BCM590XX_IOSR2PMCTRL1;227 break;228 case BCM590XX_REG_MSR:229 reg = BCM590XX_MSRPMCTRL1;230 break;231 case BCM590XX_REG_SDSR1:232 reg = BCM590XX_SDSR1PMCTRL1;233 break;234 case BCM590XX_REG_SDSR2:235 reg = BCM590XX_SDSR2PMCTRL1;236 break;237 case BCM590XX_REG_VSR:238 reg = BCM590XX_VSRPMCTRL1;239 break;240 case BCM590XX_REG_VBUS:241 reg = BCM590XX_OTG_CTRL;242 break;243 }244 245 246 return reg;247}248 249static const struct regulator_ops bcm590xx_ops_ldo = {250 .is_enabled = regulator_is_enabled_regmap,251 .enable = regulator_enable_regmap,252 .disable = regulator_disable_regmap,253 .get_voltage_sel = regulator_get_voltage_sel_regmap,254 .set_voltage_sel = regulator_set_voltage_sel_regmap,255 .list_voltage = regulator_list_voltage_table,256 .map_voltage = regulator_map_voltage_iterate,257};258 259static const struct regulator_ops bcm590xx_ops_dcdc = {260 .is_enabled = regulator_is_enabled_regmap,261 .enable = regulator_enable_regmap,262 .disable = regulator_disable_regmap,263 .get_voltage_sel = regulator_get_voltage_sel_regmap,264 .set_voltage_sel = regulator_set_voltage_sel_regmap,265 .list_voltage = regulator_list_voltage_linear_range,266 .map_voltage = regulator_map_voltage_linear_range,267};268 269static const struct regulator_ops bcm590xx_ops_vbus = {270 .is_enabled = regulator_is_enabled_regmap,271 .enable = regulator_enable_regmap,272 .disable = regulator_disable_regmap,273};274 275static int bcm590xx_probe(struct platform_device *pdev)276{277 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);278 struct bcm590xx_reg *pmu;279 struct regulator_config config = { };280 struct bcm590xx_info *info;281 struct regulator_dev *rdev;282 int i;283 284 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);285 if (!pmu)286 return -ENOMEM;287 288 pmu->mfd = bcm590xx;289 290 platform_set_drvdata(pdev, pmu);291 292 pmu->desc = devm_kcalloc(&pdev->dev,293 BCM590XX_NUM_REGS,294 sizeof(struct regulator_desc),295 GFP_KERNEL);296 if (!pmu->desc)297 return -ENOMEM;298 299 info = bcm590xx_regs;300 301 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {302 /* Register the regulators */303 pmu->desc[i].name = info->name;304 pmu->desc[i].of_match = of_match_ptr(info->name);305 pmu->desc[i].regulators_node = of_match_ptr("regulators");306 pmu->desc[i].supply_name = info->vin_name;307 pmu->desc[i].id = i;308 pmu->desc[i].volt_table = info->volt_table;309 pmu->desc[i].n_voltages = info->n_voltages;310 pmu->desc[i].linear_ranges = info->linear_ranges;311 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;312 313 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {314 pmu->desc[i].ops = &bcm590xx_ops_ldo;315 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;316 } else if (BCM590XX_REG_IS_VBUS(i))317 pmu->desc[i].ops = &bcm590xx_ops_vbus;318 else {319 pmu->desc[i].ops = &bcm590xx_ops_dcdc;320 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;321 }322 323 if (BCM590XX_REG_IS_VBUS(i))324 pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;325 else {326 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);327 pmu->desc[i].enable_is_inverted = true;328 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;329 }330 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);331 pmu->desc[i].type = REGULATOR_VOLTAGE;332 pmu->desc[i].owner = THIS_MODULE;333 334 config.dev = bcm590xx->dev;335 config.driver_data = pmu;336 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))337 config.regmap = bcm590xx->regmap_sec;338 else339 config.regmap = bcm590xx->regmap_pri;340 341 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],342 &config);343 if (IS_ERR(rdev)) {344 dev_err(bcm590xx->dev,345 "failed to register %s regulator\n",346 pdev->name);347 return PTR_ERR(rdev);348 }349 }350 351 return 0;352}353 354static struct platform_driver bcm590xx_regulator_driver = {355 .driver = {356 .name = "bcm590xx-vregs",357 .probe_type = PROBE_PREFER_ASYNCHRONOUS,358 },359 .probe = bcm590xx_probe,360};361module_platform_driver(bcm590xx_regulator_driver);362 363MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");364MODULE_DESCRIPTION("BCM590xx voltage regulator driver");365MODULE_LICENSE("GPL v2");366MODULE_ALIAS("platform:bcm590xx-vregs");367