1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Regulator driver for LP87565 PMIC 4 * 5 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/ 6 */ 7 8#include <linux/module.h> 9#include <linux/platform_device.h> 10#include <linux/regmap.h> 11 12#include <linux/mfd/lp87565.h> 13 14enum LP87565_regulator_id { 15 /* BUCK's */ 16 LP87565_BUCK_0, 17 LP87565_BUCK_1, 18 LP87565_BUCK_2, 19 LP87565_BUCK_3, 20 LP87565_BUCK_10, 21 LP87565_BUCK_23, 22 LP87565_BUCK_3210, 23}; 24 25#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, \ 26 _er, _em, _ev, _delay, _lr, _cr) \ 27 [_id] = { \ 28 .desc = { \ 29 .name = _name, \ 30 .supply_name = _of "-in", \ 31 .id = _id, \ 32 .of_match = _of, \ 33 .regulators_node = "regulators", \ 34 .ops = &_ops, \ 35 .n_voltages = _n, \ 36 .type = REGULATOR_VOLTAGE, \ 37 .owner = THIS_MODULE, \ 38 .vsel_reg = _vr, \ 39 .vsel_mask = _vm, \ 40 .enable_reg = _er, \ 41 .enable_mask = _em, \ 42 .enable_val = _ev, \ 43 .ramp_delay = _delay, \ 44 .linear_ranges = _lr, \ 45 .n_linear_ranges = ARRAY_SIZE(_lr), \ 46 .curr_table = lp87565_buck_uA, \ 47 .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\ 48 .csel_reg = (_cr), \ 49 .csel_mask = LP87565_BUCK_CTRL_2_ILIM, \ 50 }, \ 51 .ctrl2_reg = _cr, \ 52 } 53 54struct lp87565_regulator { 55 struct regulator_desc desc; 56 unsigned int ctrl2_reg; 57}; 58 59static const struct lp87565_regulator regulators[]; 60 61static const struct linear_range buck0_1_2_3_ranges[] = { 62 REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000), 63 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), 64 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), 65}; 66 67static const unsigned int lp87565_buck_ramp_delay[] = { 68 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 69}; 70 71/* LP87565 BUCK current limit */ 72static const unsigned int lp87565_buck_uA[] = { 73 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, 74}; 75 76static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev, 77 int ramp_delay) 78{ 79 int id = rdev_get_id(rdev); 80 unsigned int reg; 81 int ret; 82 83 if (ramp_delay <= 470) 84 reg = 7; 85 else if (ramp_delay <= 940) 86 reg = 6; 87 else if (ramp_delay <= 1900) 88 reg = 5; 89 else if (ramp_delay <= 3800) 90 reg = 4; 91 else if (ramp_delay <= 7500) 92 reg = 3; 93 else if (ramp_delay <= 10000) 94 reg = 2; 95 else if (ramp_delay <= 15000) 96 reg = 1; 97 else 98 reg = 0; 99 100 ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg, 101 LP87565_BUCK_CTRL_2_SLEW_RATE, 102 reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); 103 if (ret) { 104 dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret); 105 return ret; 106 } 107 108 rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; 109 110 /* Conservatively give a 15% margin */ 111 rdev->constraints->ramp_delay = 112 rdev->constraints->ramp_delay * 85 / 100; 113 114 return 0; 115} 116 117/* Operations permitted on BUCKs */ 118static const struct regulator_ops lp87565_buck_ops = { 119 .is_enabled = regulator_is_enabled_regmap, 120 .enable = regulator_enable_regmap, 121 .disable = regulator_disable_regmap, 122 .get_voltage_sel = regulator_get_voltage_sel_regmap, 123 .set_voltage_sel = regulator_set_voltage_sel_regmap, 124 .list_voltage = regulator_list_voltage_linear_range, 125 .map_voltage = regulator_map_voltage_linear_range, 126 .set_voltage_time_sel = regulator_set_voltage_time_sel, 127 .set_ramp_delay = lp87565_buck_set_ramp_delay, 128 .set_current_limit = regulator_set_current_limit_regmap, 129 .get_current_limit = regulator_get_current_limit_regmap, 130}; 131 132static const struct lp87565_regulator regulators[] = { 133 LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, 134 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, 135 LP87565_REG_BUCK0_CTRL_1, 136 LP87565_BUCK_CTRL_1_EN | 137 LP87565_BUCK_CTRL_1_EN_PIN_CTRL, 138 LP87565_BUCK_CTRL_1_EN, 3230, 139 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 140 LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, 141 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, 142 LP87565_REG_BUCK1_CTRL_1, 143 LP87565_BUCK_CTRL_1_EN | 144 LP87565_BUCK_CTRL_1_EN_PIN_CTRL, 145 LP87565_BUCK_CTRL_1_EN, 3230, 146 buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), 147 LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, 148 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, 149 LP87565_REG_BUCK2_CTRL_1, 150 LP87565_BUCK_CTRL_1_EN | 151 LP87565_BUCK_CTRL_1_EN_PIN_CTRL, 152 LP87565_BUCK_CTRL_1_EN, 3230, 153 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), 154 LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, 155 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, 156 LP87565_REG_BUCK3_CTRL_1, 157 LP87565_BUCK_CTRL_1_EN | 158 LP87565_BUCK_CTRL_1_EN_PIN_CTRL, 159 LP87565_BUCK_CTRL_1_EN, 3230, 160 buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), 161 LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, 162 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, 163 LP87565_REG_BUCK0_CTRL_1, 164 LP87565_BUCK_CTRL_1_EN | 165 LP87565_BUCK_CTRL_1_EN_PIN_CTRL | 166 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 167 LP87565_BUCK_CTRL_1_EN | 168 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, 169 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 170 LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, 171 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, 172 LP87565_REG_BUCK2_CTRL_1, 173 LP87565_BUCK_CTRL_1_EN | 174 LP87565_BUCK_CTRL_1_EN_PIN_CTRL, 175 LP87565_BUCK_CTRL_1_EN, 3230, 176 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), 177 LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210", 178 lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT, 179 LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1, 180 LP87565_BUCK_CTRL_1_EN | 181 LP87565_BUCK_CTRL_1_EN_PIN_CTRL | 182 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 183 LP87565_BUCK_CTRL_1_EN | 184 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, 185 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 186}; 187 188static int lp87565_regulator_probe(struct platform_device *pdev) 189{ 190 struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); 191 struct regulator_config config = { }; 192 struct regulator_dev *rdev; 193 int i, min_idx, max_idx; 194 195 platform_set_drvdata(pdev, lp87565); 196 197 config.dev = &pdev->dev; 198 config.dev->of_node = lp87565->dev->of_node; 199 config.driver_data = lp87565; 200 config.regmap = lp87565->regmap; 201 202 switch (lp87565->dev_type) { 203 case LP87565_DEVICE_TYPE_LP87565_Q1: 204 min_idx = LP87565_BUCK_10; 205 max_idx = LP87565_BUCK_23; 206 break; 207 case LP87565_DEVICE_TYPE_LP87561_Q1: 208 min_idx = LP87565_BUCK_3210; 209 max_idx = LP87565_BUCK_3210; 210 break; 211 default: 212 min_idx = LP87565_BUCK_0; 213 max_idx = LP87565_BUCK_3; 214 break; 215 } 216 217 for (i = min_idx; i <= max_idx; i++) { 218 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, 219 &config); 220 if (IS_ERR(rdev)) { 221 dev_err(lp87565->dev, "failed to register %s regulator\n", 222 pdev->name); 223 return PTR_ERR(rdev); 224 } 225 } 226 227 return 0; 228} 229 230static const struct platform_device_id lp87565_regulator_id_table[] = { 231 { "lp87565-regulator", }, 232 { "lp87565-q1-regulator", }, 233 { /* sentinel */ } 234}; 235MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); 236 237static struct platform_driver lp87565_regulator_driver = { 238 .driver = { 239 .name = "lp87565-pmic", 240 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 241 }, 242 .probe = lp87565_regulator_probe, 243 .id_table = lp87565_regulator_id_table, 244}; 245module_platform_driver(lp87565_regulator_driver); 246 247MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 248MODULE_DESCRIPTION("LP87565 voltage regulator driver"); 249MODULE_LICENSE("GPL v2"); 250