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/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 15 enum 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 55 struct lp87565_regulator { 56 struct regulator_desc desc; 57 unsigned int ctrl2_reg; 58 }; 59 60 static const struct lp87565_regulator regulators[]; 61 62 static 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 68 static const unsigned int lp87565_buck_ramp_delay[] = { 69 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 70 }; 71 72 /* LP87565 BUCK current limit */ 73 static const unsigned int lp87565_buck_uA[] = { 74 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, 75 }; 76 77 static 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 else 99 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 */ 119 static 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 }; 132 133 static 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 }; 188 189 static 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 } 230 231 static const struct platform_device_id lp87565_regulator_id_table[] = { 232 { "lp87565-regulator", }, 233 { "lp87565-q1-regulator", }, 234 { /* sentinel */ } 235 }; 236 MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); 237 238 static 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 }; 246 module_platform_driver(lp87565_regulator_driver); 247 248 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 249 MODULE_DESCRIPTION("LP87565 voltage regulator driver"); 250 MODULE_LICENSE("GPL v2"); 251