1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Regulator driver for Ricoh RN5T618 PMIC
  4 *
  5 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
  6 */
  7
  8#include <linux/mfd/rn5t618.h>
  9#include <linux/module.h>
 10#include <linux/of.h>
 11#include <linux/platform_device.h>
 12#include <linux/regmap.h>
 13#include <linux/regulator/driver.h>
 14#include <linux/regulator/of_regulator.h>
 15
 16static const struct regulator_ops rn5t618_reg_ops = {
 17	.enable			= regulator_enable_regmap,
 18	.disable		= regulator_disable_regmap,
 19	.is_enabled		= regulator_is_enabled_regmap,
 20	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 21	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 22	.list_voltage		= regulator_list_voltage_linear,
 23};
 24
 25#define REG(rid, ereg, emask, vreg, vmask, min, max, step)		\
 26	{								\
 27		.name		= #rid,					\
 28		.of_match	= of_match_ptr(#rid),			\
 29		.regulators_node = of_match_ptr("regulators"),		\
 30		.id		= RN5T618_##rid,			\
 31		.type		= REGULATOR_VOLTAGE,			\
 32		.owner		= THIS_MODULE,				\
 33		.ops		= &rn5t618_reg_ops,			\
 34		.n_voltages	= ((max) - (min)) / (step) + 1,		\
 35		.min_uV		= (min),				\
 36		.uV_step	= (step),				\
 37		.enable_reg	= RN5T618_##ereg,			\
 38		.enable_mask	= (emask),				\
 39		.vsel_reg	= RN5T618_##vreg,			\
 40		.vsel_mask	= (vmask),				\
 41	}
 42
 43static const struct regulator_desc rn5t567_regulators[] = {
 44	/* DCDC */
 45	REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
 46	REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
 47	REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
 48	REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
 49	/* LDO */
 50	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
 51	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
 52	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
 53	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
 54	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
 55	/* LDO RTC */
 56	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1200000, 3500000, 25000),
 57	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
 58};
 59
 60static const struct regulator_desc rn5t618_regulators[] = {
 61	/* DCDC */
 62	REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
 63	REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
 64	REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
 65	/* LDO */
 66	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
 67	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
 68	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
 69	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
 70	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
 71	/* LDO RTC */
 72	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
 73	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
 74};
 75
 76static const struct regulator_desc rc5t619_regulators[] = {
 77	/* DCDC */
 78	REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
 79	REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
 80	REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
 81	REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
 82	REG(DCDC5, DC5CTL, BIT(0), DC5DAC, 0xff, 600000, 3500000, 12500),
 83	/* LDO */
 84	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
 85	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
 86	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 900000, 3500000, 25000),
 87	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
 88	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 600000, 3500000, 25000),
 89	REG(LDO6, LDOEN1, BIT(5), LDO6DAC, 0x7f, 600000, 3500000, 25000),
 90	REG(LDO7, LDOEN1, BIT(6), LDO7DAC, 0x7f, 900000, 3500000, 25000),
 91	REG(LDO8, LDOEN1, BIT(7), LDO8DAC, 0x7f, 900000, 3500000, 25000),
 92	REG(LDO9, LDOEN2, BIT(0), LDO9DAC, 0x7f, 900000, 3500000, 25000),
 93	REG(LDO10, LDOEN2, BIT(1), LDO10DAC, 0x7f, 900000, 3500000, 25000),
 94	/* LDO RTC */
 95	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
 96	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
 97};
 98
 99static int rn5t618_regulator_probe(struct platform_device *pdev)
100{
101	struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
102	struct regulator_config config = { };
103	struct regulator_dev *rdev;
104	const struct regulator_desc *regulators;
105	int i;
106	int num_regulators = 0;
107
108	switch (rn5t618->variant) {
109	case RN5T567:
110		regulators = rn5t567_regulators;
111		num_regulators = ARRAY_SIZE(rn5t567_regulators);
112		break;
113	case RN5T618:
114		regulators = rn5t618_regulators;
115		num_regulators = ARRAY_SIZE(rn5t618_regulators);
116		break;
117	case RC5T619:
118		regulators = rc5t619_regulators;
119		num_regulators = ARRAY_SIZE(rc5t619_regulators);
120		break;
121	default:
122		return -EINVAL;
123	}
124
125	config.dev = pdev->dev.parent;
126	config.regmap = rn5t618->regmap;
127
128	for (i = 0; i < num_regulators; i++) {
129		rdev = devm_regulator_register(&pdev->dev,
130					       &regulators[i],
131					       &config);
132		if (IS_ERR(rdev)) {
133			dev_err(&pdev->dev, "failed to register %s regulator\n",
134				regulators[i].name);
135			return PTR_ERR(rdev);
136		}
137	}
138
139	return 0;
140}
141
142static struct platform_driver rn5t618_regulator_driver = {
143	.probe = rn5t618_regulator_probe,
144	.driver = {
145		.name	= "rn5t618-regulator",
146	},
147};
148
149module_platform_driver(rn5t618_regulator_driver);
150
151MODULE_ALIAS("platform:rn5t618-regulator");
152MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
153MODULE_DESCRIPTION("RN5T618 regulator driver");
154MODULE_LICENSE("GPL v2");