1 /* 2 * Voltage regulation driver for active-semi ACT8945A PMIC 3 * 4 * Copyright (C) 2015 Atmel Corporation 5 * 6 * Author: Wenyou Yang <wenyou.yang@atmel.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of the 11 * License, or (at your option) any later version. 12 * 13 */ 14 15 #include <linux/module.h> 16 #include <linux/of_device.h> 17 #include <linux/platform_device.h> 18 #include <linux/regulator/driver.h> 19 #include <linux/regulator/machine.h> 20 21 /** 22 * ACT8945A Global Register Map. 23 */ 24 #define ACT8945A_SYS_MODE 0x00 25 #define ACT8945A_SYS_CTRL 0x01 26 #define ACT8945A_DCDC1_VSET1 0x20 27 #define ACT8945A_DCDC1_VSET2 0x21 28 #define ACT8945A_DCDC1_CTRL 0x22 29 #define ACT8945A_DCDC2_VSET1 0x30 30 #define ACT8945A_DCDC2_VSET2 0x31 31 #define ACT8945A_DCDC2_CTRL 0x32 32 #define ACT8945A_DCDC3_VSET1 0x40 33 #define ACT8945A_DCDC3_VSET2 0x41 34 #define ACT8945A_DCDC3_CTRL 0x42 35 #define ACT8945A_LDO1_VSET 0x50 36 #define ACT8945A_LDO1_CTRL 0x51 37 #define ACT8945A_LDO2_VSET 0x54 38 #define ACT8945A_LDO2_CTRL 0x55 39 #define ACT8945A_LDO3_VSET 0x60 40 #define ACT8945A_LDO3_CTRL 0x61 41 #define ACT8945A_LDO4_VSET 0x64 42 #define ACT8945A_LDO4_CTRL 0x65 43 44 /** 45 * Field Definitions. 46 */ 47 #define ACT8945A_ENA 0x80 /* ON - [7] */ 48 #define ACT8945A_VSEL_MASK 0x3F /* VSET - [5:0] */ 49 50 /** 51 * ACT8945A Voltage Number 52 */ 53 #define ACT8945A_VOLTAGE_NUM 64 54 55 enum { 56 ACT8945A_ID_DCDC1, 57 ACT8945A_ID_DCDC2, 58 ACT8945A_ID_DCDC3, 59 ACT8945A_ID_LDO1, 60 ACT8945A_ID_LDO2, 61 ACT8945A_ID_LDO3, 62 ACT8945A_ID_LDO4, 63 ACT8945A_REG_NUM, 64 }; 65 66 static const struct regulator_linear_range act8945a_voltage_ranges[] = { 67 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), 68 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), 69 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), 70 }; 71 72 static struct regulator_ops act8945a_ops = { 73 .list_voltage = regulator_list_voltage_linear_range, 74 .map_voltage = regulator_map_voltage_linear_range, 75 .get_voltage_sel = regulator_get_voltage_sel_regmap, 76 .set_voltage_sel = regulator_set_voltage_sel_regmap, 77 .enable = regulator_enable_regmap, 78 .disable = regulator_disable_regmap, 79 .is_enabled = regulator_is_enabled_regmap, 80 }; 81 82 #define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \ 83 [_family##_ID_##_id] = { \ 84 .name = _name, \ 85 .supply_name = _supply, \ 86 .of_match = of_match_ptr("REG_"#_id), \ 87 .regulators_node = of_match_ptr("regulators"), \ 88 .id = _family##_ID_##_id, \ 89 .type = REGULATOR_VOLTAGE, \ 90 .ops = &act8945a_ops, \ 91 .n_voltages = ACT8945A_VOLTAGE_NUM, \ 92 .linear_ranges = act8945a_voltage_ranges, \ 93 .n_linear_ranges = ARRAY_SIZE(act8945a_voltage_ranges), \ 94 .vsel_reg = _family##_##_id##_##_vsel_reg, \ 95 .vsel_mask = ACT8945A_VSEL_MASK, \ 96 .enable_reg = _family##_##_id##_CTRL, \ 97 .enable_mask = ACT8945A_ENA, \ 98 .owner = THIS_MODULE, \ 99 } 100 101 static const struct regulator_desc act8945a_regulators[] = { 102 ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"), 103 ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"), 104 ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"), 105 ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"), 106 ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"), 107 ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"), 108 ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"), 109 }; 110 111 static const struct regulator_desc act8945a_alt_regulators[] = { 112 ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"), 113 ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"), 114 ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"), 115 ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"), 116 ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"), 117 ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"), 118 ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"), 119 }; 120 121 static int act8945a_pmic_probe(struct platform_device *pdev) 122 { 123 struct regulator_config config = { }; 124 const struct regulator_desc *regulators; 125 struct regulator_dev *rdev; 126 int i, num_regulators; 127 bool voltage_select; 128 129 voltage_select = of_property_read_bool(pdev->dev.parent->of_node, 130 "active-semi,vsel-high"); 131 132 if (voltage_select) { 133 regulators = act8945a_alt_regulators; 134 num_regulators = ARRAY_SIZE(act8945a_alt_regulators); 135 } else { 136 regulators = act8945a_regulators; 137 num_regulators = ARRAY_SIZE(act8945a_regulators); 138 } 139 140 config.dev = &pdev->dev; 141 config.dev->of_node = pdev->dev.parent->of_node; 142 for (i = 0; i < num_regulators; i++) { 143 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config); 144 if (IS_ERR(rdev)) { 145 dev_err(&pdev->dev, 146 "failed to register %s regulator\n", 147 regulators[i].name); 148 return PTR_ERR(rdev); 149 } 150 } 151 152 return 0; 153 } 154 155 static struct platform_driver act8945a_pmic_driver = { 156 .driver = { 157 .name = "act8945a-regulator", 158 }, 159 .probe = act8945a_pmic_probe, 160 }; 161 module_platform_driver(act8945a_pmic_driver); 162 163 MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver"); 164 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 165 MODULE_LICENSE("GPL"); 166