154 lines
4.6 KiB
C
154 lines
4.6 KiB
C
/*
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* Regulator driver for TI TCS4838x PMICs
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*
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
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* Andrew F. Davis <afd@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether expressed or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License version 2 for more details.
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*
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* Based on the TPS65218 driver and the previous TCS4838 driver by
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* Margarita Olaya Cabrera <magi@slimlogic.co.uk>
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/pmu-ext.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#define PMU_EXT_REGULATOR(_family, _id, _match, _supply, _ranges, _n_voltages, \
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_vreg, _vmask, _ereg, _emask) \
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[_family##_##_id] = { \
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.name = (_match), \
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.supply_name = (_supply), \
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.of_match = of_match_ptr(_match), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = _family##_##_id, \
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.n_voltages = (_n_voltages), \
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.owner = THIS_MODULE, \
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.vsel_reg = (_vreg), \
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.vsel_mask = (_vmask), \
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.enable_reg = (_ereg), \
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.enable_mask = (_emask), \
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.linear_ranges = (_ranges), \
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.n_linear_ranges = ARRAY_SIZE(_ranges), \
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.ops = &pmu_ext_ops_dcdc, \
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}
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/* Operations permitted on DCDCx */
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static struct regulator_ops pmu_ext_ops_dcdc = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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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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};
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static const struct regulator_linear_range tcs4838_dcdc_ranges[] = {
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REGULATOR_LINEAR_RANGE(712500, 0x0, 0x3F, 12500),
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};
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static const struct regulator_desc tcs4838_regulators[] = {
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PMU_EXT_REGULATOR(TCS4838, DCDC0, "dcdc0", "vin1", tcs4838_dcdc_ranges,
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0x40, TCS4838_VSEL0, GENMASK(5, 0), TCS4838_VSEL0, BIT(7)),
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PMU_EXT_REGULATOR(TCS4838, DCDC1, "dcdc1", "vin1", tcs4838_dcdc_ranges,
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0x40, TCS4838_VSEL1, GENMASK(5, 0), TCS4838_VSEL1, BIT(7)),
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};
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static const struct regulator_linear_range sy8827g_dcdc_ranges[] = {
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REGULATOR_LINEAR_RANGE(600000, 0x0, 0x3F, 12500),
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};
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static const struct regulator_desc sy8827g_regulators[] = {
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PMU_EXT_REGULATOR(SY8827G, DCDC0, "dcdc0", "vin1", sy8827g_dcdc_ranges,
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0x40, SY8827G_VSEL0, GENMASK(5, 0), SY8827G_VSEL0, BIT(7)),
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PMU_EXT_REGULATOR(SY8827G, DCDC1, "dcdc1", "vin1", sy8827g_dcdc_ranges,
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0x40, SY8827G_VSEL1, GENMASK(5, 0), SY8827G_VSEL1, BIT(7)),
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};
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static int pmu_ext_regulator_probe(struct platform_device *pdev)
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{
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struct regulator_dev *rdev;
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struct pmu_ext_dev *ext = dev_get_drvdata(pdev->dev.parent);
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const struct regulator_desc *regulators;
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struct regulator_config config = {
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.dev = pdev->dev.parent,
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.regmap = ext->regmap,
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.driver_data = ext,
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};
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int i, nregulators;
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switch (ext->variant) {
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case TCS4838_ID:
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regulators = tcs4838_regulators;
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nregulators = TCS4838_REG_ID_MAX;
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break;
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case SY8827G_ID:
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regulators = sy8827g_regulators;
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nregulators = SY8827G_REG_ID_MAX;
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break;
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default:
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dev_err(&pdev->dev, "Unsupported pmu_ext variant: %ld\n",
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ext->variant);
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return -EINVAL;
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}
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for (i = 0; i < nregulators; i++) {
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const struct regulator_desc *desc = ®ulators[i];
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rdev = devm_regulator_register(&pdev->dev, desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "Failed to register %s\n",
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regulators[i].name);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static int pmu_ext_regulator_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver pmu_ext_regulator_driver = {
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.driver = {
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.name = "pmu-ext-regulator",
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},
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.probe = pmu_ext_regulator_probe,
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.remove = pmu_ext_regulator_remove,
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};
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static int __init pmu_ext_regulator_init(void)
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{
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return platform_driver_register(&pmu_ext_regulator_driver);
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}
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static void __exit pmu_ext_regulator_exit(void)
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{
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platform_driver_unregister(&pmu_ext_regulator_driver);
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}
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subsys_initcall(pmu_ext_regulator_init);
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module_exit(pmu_ext_regulator_exit);
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MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
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MODULE_DESCRIPTION("pmu_ext voltage regulator driver");
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MODULE_LICENSE("GPL v2");
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