251 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Regulator driver for LP87565 PMIC4 *5 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/6 */7 8#include <linux/bitfield.h>9#include <linux/module.h>10#include <linux/platform_device.h>11#include <linux/regmap.h>12 13#include <linux/mfd/lp87565.h>14 15enum LP87565_regulator_id {16 /* BUCK's */17 LP87565_BUCK_0,18 LP87565_BUCK_1,19 LP87565_BUCK_2,20 LP87565_BUCK_3,21 LP87565_BUCK_10,22 LP87565_BUCK_23,23 LP87565_BUCK_3210,24};25 26#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, \27 _er, _em, _ev, _delay, _lr, _cr) \28 [_id] = { \29 .desc = { \30 .name = _name, \31 .supply_name = _of "-in", \32 .id = _id, \33 .of_match = _of, \34 .regulators_node = "regulators", \35 .ops = &_ops, \36 .n_voltages = _n, \37 .type = REGULATOR_VOLTAGE, \38 .owner = THIS_MODULE, \39 .vsel_reg = _vr, \40 .vsel_mask = _vm, \41 .enable_reg = _er, \42 .enable_mask = _em, \43 .enable_val = _ev, \44 .ramp_delay = _delay, \45 .linear_ranges = _lr, \46 .n_linear_ranges = ARRAY_SIZE(_lr), \47 .curr_table = lp87565_buck_uA, \48 .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\49 .csel_reg = (_cr), \50 .csel_mask = LP87565_BUCK_CTRL_2_ILIM, \51 }, \52 .ctrl2_reg = _cr, \53 }54 55struct lp87565_regulator {56 struct regulator_desc desc;57 unsigned int ctrl2_reg;58};59 60static const struct lp87565_regulator regulators[];61 62static const struct linear_range buck0_1_2_3_ranges[] = {63 REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),64 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),65 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),66};67 68static const unsigned int lp87565_buck_ramp_delay[] = {69 30000, 15000, 10000, 7500, 3800, 1900, 940, 47070};71 72/* LP87565 BUCK current limit */73static const unsigned int lp87565_buck_uA[] = {74 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,75};76 77static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,78 int ramp_delay)79{80 int id = rdev_get_id(rdev);81 unsigned int reg;82 int ret;83 84 if (ramp_delay <= 470)85 reg = 7;86 else if (ramp_delay <= 940)87 reg = 6;88 else if (ramp_delay <= 1900)89 reg = 5;90 else if (ramp_delay <= 3800)91 reg = 4;92 else if (ramp_delay <= 7500)93 reg = 3;94 else if (ramp_delay <= 10000)95 reg = 2;96 else if (ramp_delay <= 15000)97 reg = 1;98 else99 reg = 0;100 101 ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg,102 LP87565_BUCK_CTRL_2_SLEW_RATE,103 FIELD_PREP(LP87565_BUCK_CTRL_2_SLEW_RATE, reg));104 if (ret) {105 dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret);106 return ret;107 }108 109 rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];110 111 /* Conservatively give a 15% margin */112 rdev->constraints->ramp_delay =113 rdev->constraints->ramp_delay * 85 / 100;114 115 return 0;116}117 118/* Operations permitted on BUCKs */119static const struct regulator_ops lp87565_buck_ops = {120 .is_enabled = regulator_is_enabled_regmap,121 .enable = regulator_enable_regmap,122 .disable = regulator_disable_regmap,123 .get_voltage_sel = regulator_get_voltage_sel_regmap,124 .set_voltage_sel = regulator_set_voltage_sel_regmap,125 .list_voltage = regulator_list_voltage_linear_range,126 .map_voltage = regulator_map_voltage_linear_range,127 .set_voltage_time_sel = regulator_set_voltage_time_sel,128 .set_ramp_delay = lp87565_buck_set_ramp_delay,129 .set_current_limit = regulator_set_current_limit_regmap,130 .get_current_limit = regulator_get_current_limit_regmap,131};132 133static const struct lp87565_regulator regulators[] = {134 LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,135 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,136 LP87565_REG_BUCK0_CTRL_1,137 LP87565_BUCK_CTRL_1_EN |138 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,139 LP87565_BUCK_CTRL_1_EN, 3230,140 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),141 LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,142 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,143 LP87565_REG_BUCK1_CTRL_1,144 LP87565_BUCK_CTRL_1_EN |145 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,146 LP87565_BUCK_CTRL_1_EN, 3230,147 buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),148 LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,149 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,150 LP87565_REG_BUCK2_CTRL_1,151 LP87565_BUCK_CTRL_1_EN |152 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,153 LP87565_BUCK_CTRL_1_EN, 3230,154 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),155 LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,156 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,157 LP87565_REG_BUCK3_CTRL_1,158 LP87565_BUCK_CTRL_1_EN |159 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,160 LP87565_BUCK_CTRL_1_EN, 3230,161 buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),162 LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,163 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,164 LP87565_REG_BUCK0_CTRL_1,165 LP87565_BUCK_CTRL_1_EN |166 LP87565_BUCK_CTRL_1_EN_PIN_CTRL |167 LP87565_BUCK_CTRL_1_FPWM_MP_0_2,168 LP87565_BUCK_CTRL_1_EN |169 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,170 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),171 LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,172 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,173 LP87565_REG_BUCK2_CTRL_1,174 LP87565_BUCK_CTRL_1_EN |175 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,176 LP87565_BUCK_CTRL_1_EN, 3230,177 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),178 LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210",179 lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT,180 LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1,181 LP87565_BUCK_CTRL_1_EN |182 LP87565_BUCK_CTRL_1_EN_PIN_CTRL |183 LP87565_BUCK_CTRL_1_FPWM_MP_0_2,184 LP87565_BUCK_CTRL_1_EN |185 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,186 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),187};188 189static int lp87565_regulator_probe(struct platform_device *pdev)190{191 struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);192 struct regulator_config config = { };193 struct regulator_dev *rdev;194 int i, min_idx, max_idx;195 196 platform_set_drvdata(pdev, lp87565);197 198 config.dev = &pdev->dev;199 config.dev->of_node = lp87565->dev->of_node;200 config.driver_data = lp87565;201 config.regmap = lp87565->regmap;202 203 switch (lp87565->dev_type) {204 case LP87565_DEVICE_TYPE_LP87565_Q1:205 min_idx = LP87565_BUCK_10;206 max_idx = LP87565_BUCK_23;207 break;208 case LP87565_DEVICE_TYPE_LP87561_Q1:209 min_idx = LP87565_BUCK_3210;210 max_idx = LP87565_BUCK_3210;211 break;212 default:213 min_idx = LP87565_BUCK_0;214 max_idx = LP87565_BUCK_3;215 break;216 }217 218 for (i = min_idx; i <= max_idx; i++) {219 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc,220 &config);221 if (IS_ERR(rdev)) {222 dev_err(lp87565->dev, "failed to register %s regulator\n",223 pdev->name);224 return PTR_ERR(rdev);225 }226 }227 228 return 0;229}230 231static const struct platform_device_id lp87565_regulator_id_table[] = {232 { "lp87565-regulator", },233 { "lp87565-q1-regulator", },234 { /* sentinel */ }235};236MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);237 238static struct platform_driver lp87565_regulator_driver = {239 .driver = {240 .name = "lp87565-pmic",241 .probe_type = PROBE_PREFER_ASYNCHRONOUS,242 },243 .probe = lp87565_regulator_probe,244 .id_table = lp87565_regulator_id_table,245};246module_platform_driver(lp87565_regulator_driver);247 248MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");249MODULE_DESCRIPTION("LP87565 voltage regulator driver");250MODULE_LICENSE("GPL v2");251