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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Regulator driver for LP873X PMIC4 *5 * Copyright (C) 2016 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/lp873x.h>14 15#define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \16 _delay, _lr, _cr) \17 [_id] = { \18 .desc = { \19 .name = _name, \20 .supply_name = _of "-in", \21 .id = _id, \22 .of_match = of_match_ptr(_of), \23 .regulators_node = of_match_ptr("regulators"),\24 .ops = &_ops, \25 .n_voltages = _n, \26 .type = REGULATOR_VOLTAGE, \27 .owner = THIS_MODULE, \28 .vsel_reg = _vr, \29 .vsel_mask = _vm, \30 .enable_reg = _er, \31 .enable_mask = _em, \32 .ramp_delay = _delay, \33 .linear_ranges = _lr, \34 .n_linear_ranges = ARRAY_SIZE(_lr), \35 .curr_table = lp873x_buck_uA, \36 .n_current_limits = ARRAY_SIZE(lp873x_buck_uA), \37 .csel_reg = (_cr), \38 .csel_mask = LP873X_BUCK0_CTRL_2_BUCK0_ILIM,\39 }, \40 .ctrl2_reg = _cr, \41 }42 43struct lp873x_regulator {44 struct regulator_desc desc;45 unsigned int ctrl2_reg;46};47 48static const struct lp873x_regulator regulators[];49 50static const struct linear_range buck0_buck1_ranges[] = {51 REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0),52 REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000),53 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),54 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),55};56 57static const struct linear_range ldo0_ldo1_ranges[] = {58 REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000),59};60 61static const unsigned int lp873x_buck_ramp_delay[] = {62 30000, 15000, 10000, 7500, 3800, 1900, 940, 47063};64 65/* LP873X BUCK current limit */66static const unsigned int lp873x_buck_uA[] = {67 1500000, 2000000, 2500000, 3000000, 3500000, 4000000,68};69 70static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev,71 int ramp_delay)72{73 int id = rdev_get_id(rdev);74 struct lp873x *lp873 = rdev_get_drvdata(rdev);75 unsigned int reg;76 int ret;77 78 if (ramp_delay <= 470)79 reg = 7;80 else if (ramp_delay <= 940)81 reg = 6;82 else if (ramp_delay <= 1900)83 reg = 5;84 else if (ramp_delay <= 3800)85 reg = 4;86 else if (ramp_delay <= 7500)87 reg = 3;88 else if (ramp_delay <= 10000)89 reg = 2;90 else if (ramp_delay <= 15000)91 reg = 1;92 else93 reg = 0;94 95 ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg,96 LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE,97 FIELD_PREP(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, reg));98 if (ret) {99 dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret);100 return ret;101 }102 103 rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg];104 105 return 0;106}107 108/* Operations permitted on BUCK0, BUCK1 */109static const struct regulator_ops lp873x_buck01_ops = {110 .is_enabled = regulator_is_enabled_regmap,111 .enable = regulator_enable_regmap,112 .disable = regulator_disable_regmap,113 .get_voltage_sel = regulator_get_voltage_sel_regmap,114 .set_voltage_sel = regulator_set_voltage_sel_regmap,115 .list_voltage = regulator_list_voltage_linear_range,116 .map_voltage = regulator_map_voltage_linear_range,117 .set_voltage_time_sel = regulator_set_voltage_time_sel,118 .set_ramp_delay = lp873x_buck_set_ramp_delay,119 .set_current_limit = regulator_set_current_limit_regmap,120 .get_current_limit = regulator_get_current_limit_regmap,121};122 123/* Operations permitted on LDO0 and LDO1 */124static const struct regulator_ops lp873x_ldo01_ops = {125 .is_enabled = regulator_is_enabled_regmap,126 .enable = regulator_enable_regmap,127 .disable = regulator_disable_regmap,128 .get_voltage_sel = regulator_get_voltage_sel_regmap,129 .set_voltage_sel = regulator_set_voltage_sel_regmap,130 .list_voltage = regulator_list_voltage_linear_range,131 .map_voltage = regulator_map_voltage_linear_range,132};133 134static const struct lp873x_regulator regulators[] = {135 LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops,136 256, LP873X_REG_BUCK0_VOUT,137 LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1,138 LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000,139 buck0_buck1_ranges, LP873X_REG_BUCK0_CTRL_2),140 LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops,141 256, LP873X_REG_BUCK1_VOUT,142 LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1,143 LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000,144 buck0_buck1_ranges, LP873X_REG_BUCK1_CTRL_2),145 LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26,146 LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET,147 LP873X_REG_LDO0_CTRL,148 LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 0xFF),149 LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26,150 LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET,151 LP873X_REG_LDO1_CTRL,152 LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 0xFF),153};154 155static int lp873x_regulator_probe(struct platform_device *pdev)156{157 struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent);158 struct regulator_config config = { };159 struct regulator_dev *rdev;160 int i;161 162 platform_set_drvdata(pdev, lp873);163 164 config.dev = &pdev->dev;165 config.dev->of_node = lp873->dev->of_node;166 config.driver_data = lp873;167 config.regmap = lp873->regmap;168 169 for (i = 0; i < ARRAY_SIZE(regulators); i++) {170 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc,171 &config);172 if (IS_ERR(rdev)) {173 dev_err(lp873->dev, "failed to register %s regulator\n",174 pdev->name);175 return PTR_ERR(rdev);176 }177 }178 179 return 0;180}181 182static const struct platform_device_id lp873x_regulator_id_table[] = {183 { "lp873x-regulator", },184 { /* sentinel */ }185};186MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table);187 188static struct platform_driver lp873x_regulator_driver = {189 .driver = {190 .name = "lp873x-pmic",191 .probe_type = PROBE_PREFER_ASYNCHRONOUS,192 },193 .probe = lp873x_regulator_probe,194 .id_table = lp873x_regulator_id_table,195};196module_platform_driver(lp873x_regulator_driver);197 198MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");199MODULE_DESCRIPTION("LP873X voltage regulator driver");200MODULE_ALIAS("platform:lp873x-pmic");201MODULE_LICENSE("GPL v2");202