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