1/*
2 * Regulator driver for Ricoh RN5T618 PMIC
3 *
4 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * You should have received a copy of the GNU General Public License
11 * along with this program. If not, see <http://www.gnu.org/licenses/>.
12 */
13
14#include <linux/mfd/rn5t618.h>
15#include <linux/module.h>
16#include <linux/of.h>
17#include <linux/platform_device.h>
18#include <linux/regmap.h>
19#include <linux/regulator/driver.h>
20#include <linux/regulator/of_regulator.h>
21
22static struct regulator_ops rn5t618_reg_ops = {
23	.enable			= regulator_enable_regmap,
24	.disable		= regulator_disable_regmap,
25	.is_enabled		= regulator_is_enabled_regmap,
26	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
27	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
28	.list_voltage		= regulator_list_voltage_linear,
29};
30
31#define REG(rid, ereg, emask, vreg, vmask, min, max, step)		\
32	[RN5T618_##rid] = {						\
33		.name		= #rid,					\
34		.of_match	= of_match_ptr(#rid),			\
35		.regulators_node = of_match_ptr("regulators"),		\
36		.id		= RN5T618_##rid,			\
37		.type		= REGULATOR_VOLTAGE,			\
38		.owner		= THIS_MODULE,				\
39		.ops		= &rn5t618_reg_ops,			\
40		.n_voltages	= ((max) - (min)) / (step) + 1,		\
41		.min_uV		= (min),				\
42		.uV_step	= (step),				\
43		.enable_reg	= RN5T618_##ereg,			\
44		.enable_mask	= (emask),				\
45		.vsel_reg	= RN5T618_##vreg,			\
46		.vsel_mask	= (vmask),				\
47	}
48
49static struct regulator_desc rn5t618_regulators[] = {
50	/* DCDC */
51	REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
52	REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
53	REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
54	/* LDO */
55	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
56	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
57	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
58	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
59	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
60	/* LDO RTC */
61	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
62	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
63};
64
65static int rn5t618_regulator_probe(struct platform_device *pdev)
66{
67	struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
68	struct regulator_config config = { };
69	struct regulator_dev *rdev;
70	int i;
71
72	for (i = 0; i < RN5T618_REG_NUM; i++) {
73		config.dev = pdev->dev.parent;
74		config.regmap = rn5t618->regmap;
75
76		rdev = devm_regulator_register(&pdev->dev,
77					       &rn5t618_regulators[i],
78					       &config);
79		if (IS_ERR(rdev)) {
80			dev_err(&pdev->dev, "failed to register %s regulator\n",
81				rn5t618_regulators[i].name);
82			return PTR_ERR(rdev);
83		}
84	}
85
86	return 0;
87}
88
89static struct platform_driver rn5t618_regulator_driver = {
90	.probe = rn5t618_regulator_probe,
91	.driver = {
92		.name	= "rn5t618-regulator",
93	},
94};
95
96module_platform_driver(rn5t618_regulator_driver);
97
98MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
99MODULE_DESCRIPTION("RN5T618 regulator driver");
100MODULE_LICENSE("GPL v2");
101