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 struct lp87565 *lp87565 = rdev_get_drvdata(rdev); 69 unsigned int reg; 70 int ret; 71 72 if (ramp_delay <= 470) 73 reg = 7; 74 else if (ramp_delay <= 940) 75 reg = 6; 76 else if (ramp_delay <= 1900) 77 reg = 5; 78 else if (ramp_delay <= 3800) 79 reg = 4; 80 else if (ramp_delay <= 7500) 81 reg = 3; 82 else if (ramp_delay <= 10000) 83 reg = 2; 84 else if (ramp_delay <= 15000) 85 reg = 1; 86 else 87 reg = 0; 88 89 ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg, 90 LP87565_BUCK_CTRL_2_SLEW_RATE, 91 reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); 92 if (ret) { 93 dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret); 94 return ret; 95 } 96 97 rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; 98 99 /* Conservatively give a 15% margin */ 100 rdev->constraints->ramp_delay = 101 rdev->constraints->ramp_delay * 85 / 100; 102 103 return 0; 104 } 105 106 /* Operations permitted on BUCKs */ 107 static const struct regulator_ops lp87565_buck_ops = { 108 .is_enabled = regulator_is_enabled_regmap, 109 .enable = regulator_enable_regmap, 110 .disable = regulator_disable_regmap, 111 .get_voltage_sel = regulator_get_voltage_sel_regmap, 112 .set_voltage_sel = regulator_set_voltage_sel_regmap, 113 .list_voltage = regulator_list_voltage_linear_range, 114 .map_voltage = regulator_map_voltage_linear_range, 115 .set_voltage_time_sel = regulator_set_voltage_time_sel, 116 .set_ramp_delay = lp87565_buck_set_ramp_delay, 117 .set_current_limit = regulator_set_current_limit_regmap, 118 .get_current_limit = regulator_get_current_limit_regmap, 119 }; 120 121 static const struct lp87565_regulator regulators[] = { 122 LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, 123 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, 124 LP87565_REG_BUCK0_CTRL_1, 125 LP87565_BUCK_CTRL_1_EN, 3230, 126 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 127 LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, 128 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, 129 LP87565_REG_BUCK1_CTRL_1, 130 LP87565_BUCK_CTRL_1_EN, 3230, 131 buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), 132 LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, 133 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, 134 LP87565_REG_BUCK2_CTRL_1, 135 LP87565_BUCK_CTRL_1_EN, 3230, 136 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), 137 LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, 138 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, 139 LP87565_REG_BUCK3_CTRL_1, 140 LP87565_BUCK_CTRL_1_EN, 3230, 141 buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), 142 LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, 143 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, 144 LP87565_REG_BUCK0_CTRL_1, 145 LP87565_BUCK_CTRL_1_EN | 146 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, 147 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 148 LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, 149 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, 150 LP87565_REG_BUCK2_CTRL_1, 151 LP87565_BUCK_CTRL_1_EN, 3230, 152 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), 153 }; 154 155 static int lp87565_regulator_probe(struct platform_device *pdev) 156 { 157 struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); 158 struct regulator_config config = { }; 159 struct regulator_dev *rdev; 160 int i, min_idx = LP87565_BUCK_0, max_idx = LP87565_BUCK_3; 161 162 platform_set_drvdata(pdev, lp87565); 163 164 config.dev = &pdev->dev; 165 config.dev->of_node = lp87565->dev->of_node; 166 config.driver_data = lp87565; 167 config.regmap = lp87565->regmap; 168 169 if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) { 170 min_idx = LP87565_BUCK_10; 171 max_idx = LP87565_BUCK_23; 172 } 173 174 for (i = min_idx; i <= max_idx; i++) { 175 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, 176 &config); 177 if (IS_ERR(rdev)) { 178 dev_err(lp87565->dev, "failed to register %s regulator\n", 179 pdev->name); 180 return PTR_ERR(rdev); 181 } 182 } 183 184 return 0; 185 } 186 187 static const struct platform_device_id lp87565_regulator_id_table[] = { 188 { "lp87565-regulator", }, 189 { "lp87565-q1-regulator", }, 190 { /* sentinel */ } 191 }; 192 MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); 193 194 static struct platform_driver lp87565_regulator_driver = { 195 .driver = { 196 .name = "lp87565-pmic", 197 }, 198 .probe = lp87565_regulator_probe, 199 .id_table = lp87565_regulator_id_table, 200 }; 201 module_platform_driver(lp87565_regulator_driver); 202 203 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 204 MODULE_DESCRIPTION("LP87565 voltage regulator driver"); 205 MODULE_LICENSE("GPL v2"); 206