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