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 const 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 .of_match = of_match_ptr(#rid), \ 35 .regulators_node = of_match_ptr("regulators"), \ 36 .id = RN5T618_##rid, \ 37 .type = REGULATOR_VOLTAGE, \ 38 .owner = THIS_MODULE, \ 39 .ops = &rn5t618_reg_ops, \ 40 .n_voltages = ((max) - (min)) / (step) + 1, \ 41 .min_uV = (min), \ 42 .uV_step = (step), \ 43 .enable_reg = RN5T618_##ereg, \ 44 .enable_mask = (emask), \ 45 .vsel_reg = RN5T618_##vreg, \ 46 .vsel_mask = (vmask), \ 47 } 48 49 static struct regulator_desc rn5t567_regulators[] = { 50 /* DCDC */ 51 REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500), 52 REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500), 53 REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500), 54 REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500), 55 /* LDO */ 56 REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000), 57 REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000), 58 REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000), 59 REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000), 60 REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000), 61 /* LDO RTC */ 62 REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1200000, 3500000, 25000), 63 REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000), 64 }; 65 66 static struct regulator_desc rn5t618_regulators[] = { 67 /* DCDC */ 68 REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500), 69 REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500), 70 REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500), 71 /* LDO */ 72 REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000), 73 REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000), 74 REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000), 75 REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000), 76 REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000), 77 /* LDO RTC */ 78 REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000), 79 REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000), 80 }; 81 82 static int rn5t618_regulator_probe(struct platform_device *pdev) 83 { 84 struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent); 85 struct regulator_config config = { }; 86 struct regulator_dev *rdev; 87 struct regulator_desc *regulators; 88 int i; 89 90 switch (rn5t618->variant) { 91 case RN5T567: 92 regulators = rn5t567_regulators; 93 break; 94 case RN5T618: 95 regulators = rn5t618_regulators; 96 break; 97 default: 98 return -EINVAL; 99 } 100 101 config.dev = pdev->dev.parent; 102 config.regmap = rn5t618->regmap; 103 104 for (i = 0; i < RN5T618_REG_NUM; i++) { 105 if (!regulators[i].name) 106 continue; 107 108 rdev = devm_regulator_register(&pdev->dev, 109 ®ulators[i], 110 &config); 111 if (IS_ERR(rdev)) { 112 dev_err(&pdev->dev, "failed to register %s regulator\n", 113 regulators[i].name); 114 return PTR_ERR(rdev); 115 } 116 } 117 118 return 0; 119 } 120 121 static struct platform_driver rn5t618_regulator_driver = { 122 .probe = rn5t618_regulator_probe, 123 .driver = { 124 .name = "rn5t618-regulator", 125 }, 126 }; 127 128 module_platform_driver(rn5t618_regulator_driver); 129 130 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>"); 131 MODULE_DESCRIPTION("RN5T618 regulator driver"); 132 MODULE_LICENSE("GPL v2"); 133