// SPDX-License-Identifier: GPL-2.0 // // Regulator driver for TPS68470 PMIC // // Copyright (c) 2021 Red Hat Inc. // Copyright (C) 2018 Intel Corporation // // Authors: // Hans de Goede // Zaikuo Wang // Tianshu Qiu // Jian Xu Zheng // Yuning Pu // Rajmohan Mani #include #include #include #include #include #include #include #include #include #include #include struct tps68470_regulator_data { struct clk *clk; }; #define TPS68470_REGULATOR(_name, _id, _ops, _n, \ _vr, _vm, _er, _em, _lr, _nlr) \ [TPS68470_ ## _name] = { \ .name = # _name, \ .id = _id, \ .ops = &_ops, \ .n_voltages = _n, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = _vr, \ .vsel_mask = _vm, \ .enable_reg = _er, \ .enable_mask = _em, \ .linear_ranges = _lr, \ .n_linear_ranges = _nlr, \ } static const struct linear_range tps68470_ldo_ranges[] = { REGULATOR_LINEAR_RANGE(875000, 0, 125, 17800), }; static const struct linear_range tps68470_core_ranges[] = { REGULATOR_LINEAR_RANGE(900000, 0, 42, 25000), }; static int tps68470_regulator_enable(struct regulator_dev *rdev) { struct tps68470_regulator_data *data = rdev->reg_data; int ret; /* The Core buck regulator needs the PMIC's PLL to be enabled */ if (rdev->desc->id == TPS68470_CORE) { ret = clk_prepare_enable(data->clk); if (ret) { dev_err(&rdev->dev, "Error enabling TPS68470 clock\n"); return ret; } } return regulator_enable_regmap(rdev); } static int tps68470_regulator_disable(struct regulator_dev *rdev) { struct tps68470_regulator_data *data = rdev->reg_data; if (rdev->desc->id == TPS68470_CORE) clk_disable_unprepare(data->clk); return regulator_disable_regmap(rdev); } /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ static const struct regulator_ops tps68470_regulator_ops = { .is_enabled = regulator_is_enabled_regmap, .enable = tps68470_regulator_enable, .disable = tps68470_regulator_disable, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, }; static const struct regulator_ops tps68470_always_on_reg_ops = { .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, }; static const struct regulator_desc regulators[] = { TPS68470_REGULATOR(CORE, TPS68470_CORE, tps68470_regulator_ops, 43, TPS68470_REG_VDVAL, TPS68470_VDVAL_DVOLT_MASK, TPS68470_REG_VDCTL, TPS68470_VDCTL_EN_MASK, tps68470_core_ranges, ARRAY_SIZE(tps68470_core_ranges)), TPS68470_REGULATOR(ANA, TPS68470_ANA, tps68470_regulator_ops, 126, TPS68470_REG_VAVAL, TPS68470_VAVAL_AVOLT_MASK, TPS68470_REG_VACTL, TPS68470_VACTL_EN_MASK, tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), TPS68470_REGULATOR(VCM, TPS68470_VCM, tps68470_regulator_ops, 126, TPS68470_REG_VCMVAL, TPS68470_VCMVAL_VCVOLT_MASK, TPS68470_REG_VCMCTL, TPS68470_VCMCTL_EN_MASK, tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), TPS68470_REGULATOR(VIO, TPS68470_VIO, tps68470_always_on_reg_ops, 126, TPS68470_REG_VIOVAL, TPS68470_VIOVAL_IOVOLT_MASK, 0, 0, tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), /* * (1) This regulator must have the same voltage as VIO if S_IO LDO is used to * power a sensor/VCM which I2C is daisy chained behind the PMIC. * (2) If there is no I2C daisy chain it can be set freely. */ TPS68470_REGULATOR(VSIO, TPS68470_VSIO, tps68470_regulator_ops, 126, TPS68470_REG_VSIOVAL, TPS68470_VSIOVAL_IOVOLT_MASK, TPS68470_REG_S_I2C_CTL, TPS68470_S_I2C_CTL_EN_MASK, tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), TPS68470_REGULATOR(AUX1, TPS68470_AUX1, tps68470_regulator_ops, 126, TPS68470_REG_VAUX1VAL, TPS68470_VAUX1VAL_AUX1VOLT_MASK, TPS68470_REG_VAUX1CTL, TPS68470_VAUX1CTL_EN_MASK, tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), TPS68470_REGULATOR(AUX2, TPS68470_AUX2, tps68470_regulator_ops, 126, TPS68470_REG_VAUX2VAL, TPS68470_VAUX2VAL_AUX2VOLT_MASK, TPS68470_REG_VAUX2CTL, TPS68470_VAUX2CTL_EN_MASK, tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)), }; static int tps68470_regulator_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct tps68470_regulator_platform_data *pdata = dev_get_platdata(dev); struct tps68470_regulator_data *data; struct regulator_config config = { }; struct regulator_dev *rdev; int i; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->clk = devm_clk_get(dev, "tps68470-clk"); if (IS_ERR(data->clk)) return dev_err_probe(dev, PTR_ERR(data->clk), "getting tps68470-clk\n"); config.dev = dev->parent; config.regmap = dev_get_drvdata(dev->parent); config.driver_data = data; for (i = 0; i < TPS68470_NUM_REGULATORS; i++) { if (pdata) config.init_data = pdata->reg_init_data[i]; else config.init_data = NULL; rdev = devm_regulator_register(dev, ®ulators[i], &config); if (IS_ERR(rdev)) return dev_err_probe(dev, PTR_ERR(rdev), "registering %s regulator\n", regulators[i].name); } return 0; } static struct platform_driver tps68470_regulator_driver = { .driver = { .name = "tps68470-regulator", .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe = tps68470_regulator_probe, }; /* * The ACPI tps68470 probe-ordering depends on the clk/gpio/regulator drivers * registering before the drivers for the camera-sensors which use them bind. * subsys_initcall() ensures this when the drivers are builtin. */ static int __init tps68470_regulator_init(void) { return platform_driver_register(&tps68470_regulator_driver); } subsys_initcall(tps68470_regulator_init); static void __exit tps68470_regulator_exit(void) { platform_driver_unregister(&tps68470_regulator_driver); } module_exit(tps68470_regulator_exit); MODULE_ALIAS("platform:tps68470-regulator"); MODULE_DESCRIPTION("TPS68470 voltage regulator driver"); MODULE_LICENSE("GPL v2");