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1// SPDX-License-Identifier: GPL-2.02//3// Regulator driver for TPS68470 PMIC4//5// Copyright (c) 2021 Red Hat Inc.6// Copyright (C) 2018 Intel Corporation7//8// Authors:9// Hans de Goede <hdegoede@redhat.com>10// Zaikuo Wang <zaikuo.wang@intel.com>11// Tianshu Qiu <tian.shu.qiu@intel.com>12// Jian Xu Zheng <jian.xu.zheng@intel.com>13// Yuning Pu <yuning.pu@intel.com>14// Rajmohan Mani <rajmohan.mani@intel.com>15 16#include <linux/clk.h>17#include <linux/device.h>18#include <linux/err.h>19#include <linux/init.h>20#include <linux/kernel.h>21#include <linux/mfd/tps68470.h>22#include <linux/module.h>23#include <linux/platform_data/tps68470.h>24#include <linux/platform_device.h>25#include <linux/regulator/driver.h>26#include <linux/regulator/machine.h>27 28struct tps68470_regulator_data {29 struct clk *clk;30};31 32#define TPS68470_REGULATOR(_name, _id, _ops, _n, \33 _vr, _vm, _er, _em, _lr, _nlr) \34 [TPS68470_ ## _name] = { \35 .name = # _name, \36 .id = _id, \37 .ops = &_ops, \38 .n_voltages = _n, \39 .type = REGULATOR_VOLTAGE, \40 .owner = THIS_MODULE, \41 .vsel_reg = _vr, \42 .vsel_mask = _vm, \43 .enable_reg = _er, \44 .enable_mask = _em, \45 .linear_ranges = _lr, \46 .n_linear_ranges = _nlr, \47 }48 49static const struct linear_range tps68470_ldo_ranges[] = {50 REGULATOR_LINEAR_RANGE(875000, 0, 125, 17800),51};52 53static const struct linear_range tps68470_core_ranges[] = {54 REGULATOR_LINEAR_RANGE(900000, 0, 42, 25000),55};56 57static int tps68470_regulator_enable(struct regulator_dev *rdev)58{59 struct tps68470_regulator_data *data = rdev->reg_data;60 int ret;61 62 /* The Core buck regulator needs the PMIC's PLL to be enabled */63 if (rdev->desc->id == TPS68470_CORE) {64 ret = clk_prepare_enable(data->clk);65 if (ret) {66 dev_err(&rdev->dev, "Error enabling TPS68470 clock\n");67 return ret;68 }69 }70 71 return regulator_enable_regmap(rdev);72}73 74static int tps68470_regulator_disable(struct regulator_dev *rdev)75{76 struct tps68470_regulator_data *data = rdev->reg_data;77 78 if (rdev->desc->id == TPS68470_CORE)79 clk_disable_unprepare(data->clk);80 81 return regulator_disable_regmap(rdev);82}83 84/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */85static const struct regulator_ops tps68470_regulator_ops = {86 .is_enabled = regulator_is_enabled_regmap,87 .enable = tps68470_regulator_enable,88 .disable = tps68470_regulator_disable,89 .get_voltage_sel = regulator_get_voltage_sel_regmap,90 .set_voltage_sel = regulator_set_voltage_sel_regmap,91 .list_voltage = regulator_list_voltage_linear_range,92 .map_voltage = regulator_map_voltage_linear_range,93};94 95static const struct regulator_ops tps68470_always_on_reg_ops = {96 .get_voltage_sel = regulator_get_voltage_sel_regmap,97 .set_voltage_sel = regulator_set_voltage_sel_regmap,98 .list_voltage = regulator_list_voltage_linear_range,99 .map_voltage = regulator_map_voltage_linear_range,100};101 102static const struct regulator_desc regulators[] = {103 TPS68470_REGULATOR(CORE, TPS68470_CORE, tps68470_regulator_ops, 43,104 TPS68470_REG_VDVAL, TPS68470_VDVAL_DVOLT_MASK,105 TPS68470_REG_VDCTL, TPS68470_VDCTL_EN_MASK,106 tps68470_core_ranges, ARRAY_SIZE(tps68470_core_ranges)),107 TPS68470_REGULATOR(ANA, TPS68470_ANA, tps68470_regulator_ops, 126,108 TPS68470_REG_VAVAL, TPS68470_VAVAL_AVOLT_MASK,109 TPS68470_REG_VACTL, TPS68470_VACTL_EN_MASK,110 tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),111 TPS68470_REGULATOR(VCM, TPS68470_VCM, tps68470_regulator_ops, 126,112 TPS68470_REG_VCMVAL, TPS68470_VCMVAL_VCVOLT_MASK,113 TPS68470_REG_VCMCTL, TPS68470_VCMCTL_EN_MASK,114 tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),115 TPS68470_REGULATOR(VIO, TPS68470_VIO, tps68470_always_on_reg_ops, 126,116 TPS68470_REG_VIOVAL, TPS68470_VIOVAL_IOVOLT_MASK,117 0, 0,118 tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),119/*120 * (1) This regulator must have the same voltage as VIO if S_IO LDO is used to121 * power a sensor/VCM which I2C is daisy chained behind the PMIC.122 * (2) If there is no I2C daisy chain it can be set freely.123 */124 TPS68470_REGULATOR(VSIO, TPS68470_VSIO, tps68470_regulator_ops, 126,125 TPS68470_REG_VSIOVAL, TPS68470_VSIOVAL_IOVOLT_MASK,126 TPS68470_REG_S_I2C_CTL, TPS68470_S_I2C_CTL_EN_MASK,127 tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),128 TPS68470_REGULATOR(AUX1, TPS68470_AUX1, tps68470_regulator_ops, 126,129 TPS68470_REG_VAUX1VAL, TPS68470_VAUX1VAL_AUX1VOLT_MASK,130 TPS68470_REG_VAUX1CTL, TPS68470_VAUX1CTL_EN_MASK,131 tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),132 TPS68470_REGULATOR(AUX2, TPS68470_AUX2, tps68470_regulator_ops, 126,133 TPS68470_REG_VAUX2VAL, TPS68470_VAUX2VAL_AUX2VOLT_MASK,134 TPS68470_REG_VAUX2CTL, TPS68470_VAUX2CTL_EN_MASK,135 tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),136};137 138static int tps68470_regulator_probe(struct platform_device *pdev)139{140 struct device *dev = &pdev->dev;141 struct tps68470_regulator_platform_data *pdata = dev_get_platdata(dev);142 struct tps68470_regulator_data *data;143 struct regulator_config config = { };144 struct regulator_dev *rdev;145 int i;146 147 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);148 if (!data)149 return -ENOMEM;150 151 data->clk = devm_clk_get(dev, "tps68470-clk");152 if (IS_ERR(data->clk))153 return dev_err_probe(dev, PTR_ERR(data->clk), "getting tps68470-clk\n");154 155 config.dev = dev->parent;156 config.regmap = dev_get_drvdata(dev->parent);157 config.driver_data = data;158 159 for (i = 0; i < TPS68470_NUM_REGULATORS; i++) {160 if (pdata)161 config.init_data = pdata->reg_init_data[i];162 else163 config.init_data = NULL;164 165 rdev = devm_regulator_register(dev, ®ulators[i], &config);166 if (IS_ERR(rdev))167 return dev_err_probe(dev, PTR_ERR(rdev),168 "registering %s regulator\n",169 regulators[i].name);170 }171 172 return 0;173}174 175static struct platform_driver tps68470_regulator_driver = {176 .driver = {177 .name = "tps68470-regulator",178 .probe_type = PROBE_PREFER_ASYNCHRONOUS,179 },180 .probe = tps68470_regulator_probe,181};182 183/*184 * The ACPI tps68470 probe-ordering depends on the clk/gpio/regulator drivers185 * registering before the drivers for the camera-sensors which use them bind.186 * subsys_initcall() ensures this when the drivers are builtin.187 */188static int __init tps68470_regulator_init(void)189{190 return platform_driver_register(&tps68470_regulator_driver);191}192subsys_initcall(tps68470_regulator_init);193 194static void __exit tps68470_regulator_exit(void)195{196 platform_driver_unregister(&tps68470_regulator_driver);197}198module_exit(tps68470_regulator_exit);199 200MODULE_ALIAS("platform:tps68470-regulator");201MODULE_DESCRIPTION("TPS68470 voltage regulator driver");202MODULE_LICENSE("GPL v2");203