38c0996104
This patch adds new regulator driver to support ACT8945A MFD chip's regulators. The ACT8945A has three step-down DC/DC converters and four low-dropout regulators. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
165 lines
4.9 KiB
C
165 lines
4.9 KiB
C
/*
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* Voltage regulation driver for active-semi ACT8945A PMIC
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*
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* Copyright (C) 2015 Atmel Corporation
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*
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* Author: Wenyou Yang <wenyou.yang@atmel.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 as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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*/
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#include <linux/module.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/regulator/driver.h>
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#include <linux/regulator/machine.h>
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/**
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* ACT8945A Global Register Map.
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*/
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#define ACT8945A_SYS_MODE 0x00
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#define ACT8945A_SYS_CTRL 0x01
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#define ACT8945A_DCDC1_VSET1 0x20
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#define ACT8945A_DCDC1_VSET2 0x21
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#define ACT8945A_DCDC1_CTRL 0x22
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#define ACT8945A_DCDC2_VSET1 0x30
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#define ACT8945A_DCDC2_VSET2 0x31
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#define ACT8945A_DCDC2_CTRL 0x32
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#define ACT8945A_DCDC3_VSET1 0x40
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#define ACT8945A_DCDC3_VSET2 0x41
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#define ACT8945A_DCDC3_CTRL 0x42
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#define ACT8945A_LDO1_VSET 0x50
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#define ACT8945A_LDO1_CTRL 0x51
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#define ACT8945A_LDO2_VSET 0x54
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#define ACT8945A_LDO2_CTRL 0x55
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#define ACT8945A_LDO3_VSET 0x60
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#define ACT8945A_LDO3_CTRL 0x61
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#define ACT8945A_LDO4_VSET 0x64
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#define ACT8945A_LDO4_CTRL 0x65
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/**
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* Field Definitions.
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*/
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#define ACT8945A_ENA 0x80 /* ON - [7] */
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#define ACT8945A_VSEL_MASK 0x3F /* VSET - [5:0] */
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/**
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* ACT8945A Voltage Number
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*/
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#define ACT8945A_VOLTAGE_NUM 64
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enum {
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ACT8945A_ID_DCDC1,
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ACT8945A_ID_DCDC2,
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ACT8945A_ID_DCDC3,
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ACT8945A_ID_LDO1,
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ACT8945A_ID_LDO2,
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ACT8945A_ID_LDO3,
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ACT8945A_ID_LDO4,
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ACT8945A_REG_NUM,
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};
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static const struct regulator_linear_range act8945a_voltage_ranges[] = {
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REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
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REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
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REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
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};
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static struct regulator_ops act8945a_ops = {
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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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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \
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[_family##_ID_##_id] = { \
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.name = _name, \
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.supply_name = _supply, \
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.of_match = of_match_ptr("REG_"#_id), \
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.regulators_node = of_match_ptr("regulators"), \
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.id = _family##_ID_##_id, \
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.type = REGULATOR_VOLTAGE, \
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.ops = &act8945a_ops, \
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.n_voltages = ACT8945A_VOLTAGE_NUM, \
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.linear_ranges = act8945a_voltage_ranges, \
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.n_linear_ranges = ARRAY_SIZE(act8945a_voltage_ranges), \
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.vsel_reg = _family##_##_id##_##_vsel_reg, \
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.vsel_mask = ACT8945A_VSEL_MASK, \
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.enable_reg = _family##_##_id##_CTRL, \
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.enable_mask = ACT8945A_ENA, \
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.owner = THIS_MODULE, \
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}
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static const struct regulator_desc act8945a_regulators[] = {
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ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"),
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ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"),
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ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"),
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ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
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ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
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ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
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ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
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};
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static const struct regulator_desc act8945a_alt_regulators[] = {
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ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"),
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ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"),
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ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"),
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ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
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ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
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ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
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ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
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};
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static int act8945a_pmic_probe(struct platform_device *pdev)
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{
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struct regulator_config config = { };
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const struct regulator_desc *regulators;
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struct regulator_dev *rdev;
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int i, num_regulators;
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bool voltage_select;
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voltage_select = of_property_read_bool(pdev->dev.parent->of_node,
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"active-semi,vsel-high");
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if (voltage_select) {
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regulators = act8945a_alt_regulators;
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num_regulators = ARRAY_SIZE(act8945a_alt_regulators);
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} else {
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regulators = act8945a_regulators;
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num_regulators = ARRAY_SIZE(act8945a_regulators);
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}
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config.dev = &pdev->dev;
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config.dev->of_node = pdev->dev.parent->of_node;
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for (i = 0; i < num_regulators; i++) {
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rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev,
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"failed to register %s regulator\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 struct platform_driver act8945a_pmic_driver = {
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.driver = {
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.name = "act8945a-regulator",
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},
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.probe = act8945a_pmic_probe,
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};
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module_platform_driver(act8945a_pmic_driver);
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MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver");
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MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
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MODULE_LICENSE("GPL");
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