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