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