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41cff178e3
This follows on the change ("regulator: Set PROBE_PREFER_ASYNCHRONOUS
for drivers that existed in 4.14") but changes regulators didn't exist
in Linux 5.15 but did exist in Linux 6.1.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230316125351.6.Ibc8a86ddd5055ebbbe487a529199db7b36ccad1a@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
203 lines
6.5 KiB
C
203 lines
6.5 KiB
C
// 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 <hdegoede@redhat.com>
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// Zaikuo Wang <zaikuo.wang@intel.com>
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// Tianshu Qiu <tian.shu.qiu@intel.com>
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// Jian Xu Zheng <jian.xu.zheng@intel.com>
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// Yuning Pu <yuning.pu@intel.com>
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// Rajmohan Mani <rajmohan.mani@intel.com>
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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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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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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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