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 rn5t567_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	REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
 55	/* LDO */
 56	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
 57	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
 58	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
 59	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
 60	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
 61	/* LDO RTC */
 62	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1200000, 3500000, 25000),
 63	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
 64};
 65
 66static struct regulator_desc rn5t618_regulators[] = {
 67	/* DCDC */
 68	REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
 69	REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
 70	REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
 71	/* LDO */
 72	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
 73	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
 74	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
 75	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
 76	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
 77	/* LDO RTC */
 78	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
 79	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
 80};
 81
 82static int rn5t618_regulator_probe(struct platform_device *pdev)
 83{
 84	struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
 85	struct regulator_config config = { };
 86	struct regulator_dev *rdev;
 87	struct regulator_desc *regulators;
 88	int i;
 89
 90	switch (rn5t618->variant) {
 91	case RN5T567:
 92		regulators = rn5t567_regulators;
 93		break;
 94	case RN5T618:
 95		regulators = rn5t618_regulators;
 96		break;
 97	default:
 98		return -EINVAL;
 99	}
100
101	config.dev = pdev->dev.parent;
102	config.regmap = rn5t618->regmap;
103
104	for (i = 0; i < RN5T618_REG_NUM; i++) {
105		if (!regulators[i].name)
106			continue;
107
108		rdev = devm_regulator_register(&pdev->dev,
109					       &regulators[i],
110					       &config);
111		if (IS_ERR(rdev)) {
112			dev_err(&pdev->dev, "failed to register %s regulator\n",
113				regulators[i].name);
114			return PTR_ERR(rdev);
115		}
116	}
117
118	return 0;
119}
120
121static struct platform_driver rn5t618_regulator_driver = {
122	.probe = rn5t618_regulator_probe,
123	.driver = {
124		.name	= "rn5t618-regulator",
125	},
126};
127
128module_platform_driver(rn5t618_regulator_driver);
129
130MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
131MODULE_DESCRIPTION("RN5T618 regulator driver");
132MODULE_LICENSE("GPL v2");