1 /* 2 * Regulator driver for Ricoh RN5T618 PMIC 3 * 4 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * version 2 as published by the Free Software Foundation. 9 * 10 * You should have received a copy of the GNU General Public License 11 * along with this program. If not, see <http://www.gnu.org/licenses/>. 12 */ 13 14 #include <linux/mfd/rn5t618.h> 15 #include <linux/module.h> 16 #include <linux/of.h> 17 #include <linux/platform_device.h> 18 #include <linux/regmap.h> 19 #include <linux/regulator/driver.h> 20 #include <linux/regulator/of_regulator.h> 21 22 static struct regulator_ops rn5t618_reg_ops = { 23 .enable = regulator_enable_regmap, 24 .disable = regulator_disable_regmap, 25 .is_enabled = regulator_is_enabled_regmap, 26 .set_voltage_sel = regulator_set_voltage_sel_regmap, 27 .get_voltage_sel = regulator_get_voltage_sel_regmap, 28 .list_voltage = regulator_list_voltage_linear, 29 }; 30 31 #define REG(rid, ereg, emask, vreg, vmask, min, max, step) \ 32 [RN5T618_##rid] = { \ 33 .name = #rid, \ 34 .id = RN5T618_##rid, \ 35 .type = REGULATOR_VOLTAGE, \ 36 .owner = THIS_MODULE, \ 37 .ops = &rn5t618_reg_ops, \ 38 .n_voltages = ((max) - (min)) / (step) + 1, \ 39 .min_uV = (min), \ 40 .uV_step = (step), \ 41 .enable_reg = RN5T618_##ereg, \ 42 .enable_mask = (emask), \ 43 .vsel_reg = RN5T618_##vreg, \ 44 .vsel_mask = (vmask), \ 45 } 46 47 static struct regulator_desc rn5t618_regulators[] = { 48 /* DCDC */ 49 REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500), 50 REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500), 51 REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500), 52 /* LDO */ 53 REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000), 54 REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000), 55 REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000), 56 REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000), 57 REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000), 58 /* LDO RTC */ 59 REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000), 60 REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000), 61 }; 62 63 static struct of_regulator_match rn5t618_matches[] = { 64 [RN5T618_DCDC1] = { .name = "DCDC1" }, 65 [RN5T618_DCDC2] = { .name = "DCDC2" }, 66 [RN5T618_DCDC3] = { .name = "DCDC3" }, 67 [RN5T618_LDO1] = { .name = "LDO1" }, 68 [RN5T618_LDO2] = { .name = "LDO2" }, 69 [RN5T618_LDO3] = { .name = "LDO3" }, 70 [RN5T618_LDO4] = { .name = "LDO4" }, 71 [RN5T618_LDO5] = { .name = "LDO5" }, 72 [RN5T618_LDORTC1] = { .name = "LDORTC1" }, 73 [RN5T618_LDORTC2] = { .name = "LDORTC2" }, 74 }; 75 76 static int rn5t618_regulator_parse_dt(struct platform_device *pdev) 77 { 78 struct device_node *np, *regulators; 79 int ret; 80 81 np = of_node_get(pdev->dev.parent->of_node); 82 if (!np) 83 return 0; 84 85 regulators = of_get_child_by_name(np, "regulators"); 86 if (!regulators) { 87 dev_err(&pdev->dev, "regulators node not found\n"); 88 return -EINVAL; 89 } 90 91 ret = of_regulator_match(&pdev->dev, regulators, rn5t618_matches, 92 ARRAY_SIZE(rn5t618_matches)); 93 of_node_put(regulators); 94 if (ret < 0) { 95 dev_err(&pdev->dev, "error parsing regulator init data: %d\n", 96 ret); 97 } 98 99 return 0; 100 } 101 102 static int rn5t618_regulator_probe(struct platform_device *pdev) 103 { 104 struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent); 105 struct regulator_config config = { }; 106 struct regulator_dev *rdev; 107 int ret, i; 108 109 ret = rn5t618_regulator_parse_dt(pdev); 110 if (ret) 111 return ret; 112 113 for (i = 0; i < RN5T618_REG_NUM; i++) { 114 config.dev = &pdev->dev; 115 config.init_data = rn5t618_matches[i].init_data; 116 config.of_node = rn5t618_matches[i].of_node; 117 config.regmap = rn5t618->regmap; 118 119 rdev = devm_regulator_register(&pdev->dev, 120 &rn5t618_regulators[i], 121 &config); 122 if (IS_ERR(rdev)) { 123 dev_err(&pdev->dev, "failed to register %s regulator\n", 124 rn5t618_regulators[i].name); 125 return PTR_ERR(rdev); 126 } 127 } 128 129 return 0; 130 } 131 132 static struct platform_driver rn5t618_regulator_driver = { 133 .probe = rn5t618_regulator_probe, 134 .driver = { 135 .name = "rn5t618-regulator", 136 }, 137 }; 138 139 module_platform_driver(rn5t618_regulator_driver); 140 141 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>"); 142 MODULE_DESCRIPTION("RN5T618 regulator driver"); 143 MODULE_LICENSE("GPL v2"); 144