1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Regulator driver for LP873X PMIC 4 * 5 * Copyright (C) 2016 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/lp873x.h> 14 15 #define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ 16 _delay, _lr, _cr) \ 17 [_id] = { \ 18 .desc = { \ 19 .name = _name, \ 20 .supply_name = _of "-in", \ 21 .id = _id, \ 22 .of_match = of_match_ptr(_of), \ 23 .regulators_node = of_match_ptr("regulators"),\ 24 .ops = &_ops, \ 25 .n_voltages = _n, \ 26 .type = REGULATOR_VOLTAGE, \ 27 .owner = THIS_MODULE, \ 28 .vsel_reg = _vr, \ 29 .vsel_mask = _vm, \ 30 .enable_reg = _er, \ 31 .enable_mask = _em, \ 32 .ramp_delay = _delay, \ 33 .linear_ranges = _lr, \ 34 .n_linear_ranges = ARRAY_SIZE(_lr), \ 35 .curr_table = lp873x_buck_uA, \ 36 .n_current_limits = ARRAY_SIZE(lp873x_buck_uA), \ 37 .csel_reg = (_cr), \ 38 .csel_mask = LP873X_BUCK0_CTRL_2_BUCK0_ILIM,\ 39 }, \ 40 .ctrl2_reg = _cr, \ 41 } 42 43 struct lp873x_regulator { 44 struct regulator_desc desc; 45 unsigned int ctrl2_reg; 46 }; 47 48 static const struct lp873x_regulator regulators[]; 49 50 static const struct linear_range buck0_buck1_ranges[] = { 51 REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0), 52 REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000), 53 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), 54 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), 55 }; 56 57 static const struct linear_range ldo0_ldo1_ranges[] = { 58 REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000), 59 }; 60 61 static const unsigned int lp873x_buck_ramp_delay[] = { 62 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 63 }; 64 65 /* LP873X BUCK current limit */ 66 static const unsigned int lp873x_buck_uA[] = { 67 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 68 }; 69 70 static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev, 71 int ramp_delay) 72 { 73 int id = rdev_get_id(rdev); 74 struct lp873x *lp873 = rdev_get_drvdata(rdev); 75 unsigned int reg; 76 int ret; 77 78 if (ramp_delay <= 470) 79 reg = 7; 80 else if (ramp_delay <= 940) 81 reg = 6; 82 else if (ramp_delay <= 1900) 83 reg = 5; 84 else if (ramp_delay <= 3800) 85 reg = 4; 86 else if (ramp_delay <= 7500) 87 reg = 3; 88 else if (ramp_delay <= 10000) 89 reg = 2; 90 else if (ramp_delay <= 15000) 91 reg = 1; 92 else 93 reg = 0; 94 95 ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg, 96 LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, 97 FIELD_PREP(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, reg)); 98 if (ret) { 99 dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret); 100 return ret; 101 } 102 103 rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg]; 104 105 return 0; 106 } 107 108 /* Operations permitted on BUCK0, BUCK1 */ 109 static const struct regulator_ops lp873x_buck01_ops = { 110 .is_enabled = regulator_is_enabled_regmap, 111 .enable = regulator_enable_regmap, 112 .disable = regulator_disable_regmap, 113 .get_voltage_sel = regulator_get_voltage_sel_regmap, 114 .set_voltage_sel = regulator_set_voltage_sel_regmap, 115 .list_voltage = regulator_list_voltage_linear_range, 116 .map_voltage = regulator_map_voltage_linear_range, 117 .set_voltage_time_sel = regulator_set_voltage_time_sel, 118 .set_ramp_delay = lp873x_buck_set_ramp_delay, 119 .set_current_limit = regulator_set_current_limit_regmap, 120 .get_current_limit = regulator_get_current_limit_regmap, 121 }; 122 123 /* Operations permitted on LDO0 and LDO1 */ 124 static const struct regulator_ops lp873x_ldo01_ops = { 125 .is_enabled = regulator_is_enabled_regmap, 126 .enable = regulator_enable_regmap, 127 .disable = regulator_disable_regmap, 128 .get_voltage_sel = regulator_get_voltage_sel_regmap, 129 .set_voltage_sel = regulator_set_voltage_sel_regmap, 130 .list_voltage = regulator_list_voltage_linear_range, 131 .map_voltage = regulator_map_voltage_linear_range, 132 }; 133 134 static const struct lp873x_regulator regulators[] = { 135 LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops, 136 256, LP873X_REG_BUCK0_VOUT, 137 LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1, 138 LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000, 139 buck0_buck1_ranges, LP873X_REG_BUCK0_CTRL_2), 140 LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops, 141 256, LP873X_REG_BUCK1_VOUT, 142 LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1, 143 LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000, 144 buck0_buck1_ranges, LP873X_REG_BUCK1_CTRL_2), 145 LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26, 146 LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET, 147 LP873X_REG_LDO0_CTRL, 148 LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 0xFF), 149 LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26, 150 LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET, 151 LP873X_REG_LDO1_CTRL, 152 LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 0xFF), 153 }; 154 155 static int lp873x_regulator_probe(struct platform_device *pdev) 156 { 157 struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent); 158 struct regulator_config config = { }; 159 struct regulator_dev *rdev; 160 int i; 161 162 platform_set_drvdata(pdev, lp873); 163 164 config.dev = &pdev->dev; 165 config.dev->of_node = lp873->dev->of_node; 166 config.driver_data = lp873; 167 config.regmap = lp873->regmap; 168 169 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 170 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, 171 &config); 172 if (IS_ERR(rdev)) { 173 dev_err(lp873->dev, "failed to register %s regulator\n", 174 pdev->name); 175 return PTR_ERR(rdev); 176 } 177 } 178 179 return 0; 180 } 181 182 static const struct platform_device_id lp873x_regulator_id_table[] = { 183 { "lp873x-regulator", }, 184 { /* sentinel */ } 185 }; 186 MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table); 187 188 static struct platform_driver lp873x_regulator_driver = { 189 .driver = { 190 .name = "lp873x-pmic", 191 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 192 }, 193 .probe = lp873x_regulator_probe, 194 .id_table = lp873x_regulator_id_table, 195 }; 196 module_platform_driver(lp873x_regulator_driver); 197 198 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 199 MODULE_DESCRIPTION("LP873X voltage regulator driver"); 200 MODULE_ALIAS("platform:lp873x-pmic"); 201 MODULE_LICENSE("GPL v2"); 202