144 lines
4.3 KiB
C
144 lines
4.3 KiB
C
/*
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* Regulator driver for Ricoh RN5T618 PMIC
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*
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* Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.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
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* version 2 as published by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/mfd/rn5t618.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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static struct regulator_ops rn5t618_reg_ops = {
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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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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear,
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};
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#define REG(rid, ereg, emask, vreg, vmask, min, max, step) \
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[RN5T618_##rid] = { \
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.name = #rid, \
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.id = RN5T618_##rid, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.ops = &rn5t618_reg_ops, \
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.n_voltages = ((max) - (min)) / (step) + 1, \
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.min_uV = (min), \
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.uV_step = (step), \
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.enable_reg = RN5T618_##ereg, \
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.enable_mask = (emask), \
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.vsel_reg = RN5T618_##vreg, \
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.vsel_mask = (vmask), \
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}
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static struct regulator_desc rn5t618_regulators[] = {
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/* DCDC */
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REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
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REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
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REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
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/* LDO */
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REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
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REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
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REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
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REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
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REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
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/* LDO RTC */
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REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
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REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
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};
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static struct of_regulator_match rn5t618_matches[] = {
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[RN5T618_DCDC1] = { .name = "DCDC1" },
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[RN5T618_DCDC2] = { .name = "DCDC2" },
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[RN5T618_DCDC3] = { .name = "DCDC3" },
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[RN5T618_LDO1] = { .name = "LDO1" },
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[RN5T618_LDO2] = { .name = "LDO2" },
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[RN5T618_LDO3] = { .name = "LDO3" },
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[RN5T618_LDO4] = { .name = "LDO4" },
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[RN5T618_LDO5] = { .name = "LDO5" },
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[RN5T618_LDORTC1] = { .name = "LDORTC1" },
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[RN5T618_LDORTC2] = { .name = "LDORTC2" },
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};
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static int rn5t618_regulator_parse_dt(struct platform_device *pdev)
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{
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struct device_node *np, *regulators;
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int ret;
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np = of_node_get(pdev->dev.parent->of_node);
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if (!np)
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return 0;
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regulators = of_get_child_by_name(np, "regulators");
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if (!regulators) {
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dev_err(&pdev->dev, "regulators node not found\n");
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return -EINVAL;
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}
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ret = of_regulator_match(&pdev->dev, regulators, rn5t618_matches,
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ARRAY_SIZE(rn5t618_matches));
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of_node_put(regulators);
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if (ret < 0) {
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dev_err(&pdev->dev, "error parsing regulator init data: %d\n",
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ret);
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}
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return 0;
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}
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static int rn5t618_regulator_probe(struct platform_device *pdev)
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{
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struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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int ret, i;
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ret = rn5t618_regulator_parse_dt(pdev);
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if (ret)
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return ret;
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for (i = 0; i < RN5T618_REG_NUM; i++) {
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config.dev = &pdev->dev;
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config.init_data = rn5t618_matches[i].init_data;
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config.of_node = rn5t618_matches[i].of_node;
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config.regmap = rn5t618->regmap;
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rdev = devm_regulator_register(&pdev->dev,
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&rn5t618_regulators[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "failed to register %s regulator\n",
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rn5t618_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 rn5t618_regulator_driver = {
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.probe = rn5t618_regulator_probe,
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.driver = {
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.name = "rn5t618-regulator",
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},
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};
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module_platform_driver(rn5t618_regulator_driver);
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MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
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MODULE_DESCRIPTION("RN5T618 regulator driver");
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MODULE_LICENSE("GPL v2");
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