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 
22 static const 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 	{								\
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 
49 static 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 
66 static 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 
82 static struct regulator_desc rc5t619_regulators[] = {
83 	/* DCDC */
84 	REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
85 	REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
86 	REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
87 	REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
88 	REG(DCDC5, DC5CTL, BIT(0), DC5DAC, 0xff, 600000, 3500000, 12500),
89 	/* LDO */
90 	REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
91 	REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
92 	REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 900000, 3500000, 25000),
93 	REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
94 	REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 600000, 3500000, 25000),
95 	REG(LDO6, LDOEN1, BIT(5), LDO6DAC, 0x7f, 600000, 3500000, 25000),
96 	REG(LDO7, LDOEN1, BIT(6), LDO7DAC, 0x7f, 900000, 3500000, 25000),
97 	REG(LDO8, LDOEN1, BIT(7), LDO8DAC, 0x7f, 900000, 3500000, 25000),
98 	REG(LDO9, LDOEN2, BIT(0), LDO9DAC, 0x7f, 900000, 3500000, 25000),
99 	REG(LDO10, LDOEN2, BIT(0), LDO10DAC, 0x7f, 900000, 3500000, 25000),
100 	/* LDO RTC */
101 	REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
102 	REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
103 };
104 
105 static int rn5t618_regulator_probe(struct platform_device *pdev)
106 {
107 	struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
108 	struct regulator_config config = { };
109 	struct regulator_dev *rdev;
110 	struct regulator_desc *regulators;
111 	int i;
112 	int num_regulators = 0;
113 
114 	switch (rn5t618->variant) {
115 	case RN5T567:
116 		regulators = rn5t567_regulators;
117 		num_regulators = ARRAY_SIZE(rn5t567_regulators);
118 		break;
119 	case RN5T618:
120 		regulators = rn5t618_regulators;
121 		num_regulators = ARRAY_SIZE(rn5t618_regulators);
122 		break;
123 	case RC5T619:
124 		regulators = rc5t619_regulators;
125 		num_regulators = ARRAY_SIZE(rc5t619_regulators);
126 		break;
127 	default:
128 		return -EINVAL;
129 	}
130 
131 	config.dev = pdev->dev.parent;
132 	config.regmap = rn5t618->regmap;
133 
134 	for (i = 0; i < num_regulators; i++) {
135 		rdev = devm_regulator_register(&pdev->dev,
136 					       &regulators[i],
137 					       &config);
138 		if (IS_ERR(rdev)) {
139 			dev_err(&pdev->dev, "failed to register %s regulator\n",
140 				regulators[i].name);
141 			return PTR_ERR(rdev);
142 		}
143 	}
144 
145 	return 0;
146 }
147 
148 static struct platform_driver rn5t618_regulator_driver = {
149 	.probe = rn5t618_regulator_probe,
150 	.driver = {
151 		.name	= "rn5t618-regulator",
152 	},
153 };
154 
155 module_platform_driver(rn5t618_regulator_driver);
156 
157 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
158 MODULE_DESCRIPTION("RN5T618 regulator driver");
159 MODULE_LICENSE("GPL v2");
160