1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/mfd/sm5703.h>
4#include <linux/module.h>
5#include <linux/mod_devicetable.h>
6#include <linux/platform_device.h>
7#include <linux/regmap.h>
8#include <linux/regulator/driver.h>
9#include <linux/regulator/of_regulator.h>
10
11enum sm5703_regulators {
12	SM5703_BUCK,
13	SM5703_LDO1,
14	SM5703_LDO2,
15	SM5703_LDO3,
16	SM5703_USBLDO1,
17	SM5703_USBLDO2,
18	SM5703_VBUS,
19	SM5703_MAX_REGULATORS,
20};
21
22static const int sm5703_ldo_voltagemap[] = {
23	1500000, 1800000, 2600000, 2800000, 3000000, 3300000,
24};
25
26static const int sm5703_buck_voltagemap[] = {
27	1000000, 1000000, 1000000, 1000000,
28	1000000, 1000000, 1000000, 1000000,
29	1000000, 1000000, 1000000, 1100000,
30	1200000, 1300000, 1400000, 1500000,
31	1600000, 1700000, 1800000, 1900000,
32	2000000, 2100000, 2200000, 2300000,
33	2400000, 2500000, 2600000, 2700000,
34	2800000, 2900000, 3000000, 3000000,
35};
36
37#define SM5703USBLDO(_name, _id)					\
38	[SM5703_USBLDO ## _id] = {					\
39		.name = _name,						\
40		.of_match = _name,					\
41		.regulators_node = "regulators",			\
42		.type = REGULATOR_VOLTAGE,				\
43		.id = SM5703_USBLDO ## _id,				\
44		.ops = &sm5703_regulator_ops_fixed,			\
45		.n_voltages = 1,					\
46		.fixed_uV = SM5703_USBLDO_MICROVOLT,			\
47		.enable_reg = SM5703_REG_USBLDO12,			\
48		.enable_mask = SM5703_REG_EN_USBLDO ##_id,		\
49		.owner			= THIS_MODULE,			\
50	}
51
52#define SM5703VBUS(_name)						\
53	[SM5703_VBUS] = {						\
54		.name = _name,						\
55		.of_match = _name,					\
56		.regulators_node = "regulators",			\
57		.type = REGULATOR_VOLTAGE,				\
58		.id = SM5703_VBUS,					\
59		.ops = &sm5703_regulator_ops_fixed,			\
60		.n_voltages = 1,					\
61		.fixed_uV = SM5703_VBUS_MICROVOLT,			\
62		.enable_reg = SM5703_REG_CNTL,				\
63		.enable_mask = SM5703_OPERATION_MODE_MASK,		\
64		.enable_val = SM5703_OPERATION_MODE_USB_OTG_MODE,	\
65		.disable_val = SM5703_OPERATION_MODE_CHARGING_ON,	\
66		.owner			= THIS_MODULE,			\
67	}
68
69#define SM5703BUCK(_name)						\
70	[SM5703_BUCK] = {						\
71		.name = _name,						\
72		.of_match = _name,					\
73		.regulators_node = "regulators",			\
74		.type = REGULATOR_VOLTAGE,				\
75		.id = SM5703_BUCK,					\
76		.ops = &sm5703_regulator_ops,				\
77		.n_voltages = ARRAY_SIZE(sm5703_buck_voltagemap),	\
78		.volt_table = sm5703_buck_voltagemap,			\
79		.vsel_reg = SM5703_REG_BUCK,				\
80		.vsel_mask = SM5703_BUCK_VOLT_MASK,			\
81		.enable_reg = SM5703_REG_BUCK,				\
82		.enable_mask = SM5703_REG_EN_BUCK,			\
83		.owner			= THIS_MODULE,			\
84	}
85
86#define SM5703LDO(_name, _id)						\
87	[SM5703_LDO ## _id] = {						\
88		.name = _name,						\
89		.of_match = _name,					\
90		.regulators_node = "regulators",			\
91		.type = REGULATOR_VOLTAGE,				\
92		.id = SM5703_LDO ## _id,				\
93		.ops = &sm5703_regulator_ops,				\
94		.n_voltages = ARRAY_SIZE(sm5703_ldo_voltagemap),	\
95		.volt_table = sm5703_ldo_voltagemap,			\
96		.vsel_reg = SM5703_REG_LDO ##_id,			\
97		.vsel_mask = SM5703_LDO_VOLT_MASK,			\
98		.enable_reg = SM5703_REG_LDO ##_id,			\
99		.enable_mask = SM5703_LDO_EN,				\
100		.owner			= THIS_MODULE,			\
101	}
102
103static const struct regulator_ops sm5703_regulator_ops = {
104	.enable			= regulator_enable_regmap,
105	.disable		= regulator_disable_regmap,
106	.is_enabled		= regulator_is_enabled_regmap,
107	.list_voltage		= regulator_list_voltage_table,
108	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
109	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
110};
111
112static const struct regulator_ops sm5703_regulator_ops_fixed = {
113	.enable			= regulator_enable_regmap,
114	.disable		= regulator_disable_regmap,
115	.is_enabled		= regulator_is_enabled_regmap,
116};
117
118static struct regulator_desc sm5703_regulators_desc[SM5703_MAX_REGULATORS] = {
119	SM5703BUCK("buck"),
120	SM5703LDO("ldo1", 1),
121	SM5703LDO("ldo2", 2),
122	SM5703LDO("ldo3", 3),
123	SM5703USBLDO("usbldo1", 1),
124	SM5703USBLDO("usbldo2", 2),
125	SM5703VBUS("vbus"),
126};
127
128static int sm5703_regulator_probe(struct platform_device *pdev)
129{
130	struct device *dev = &pdev->dev;
131	struct regulator_config config = { NULL, };
132	struct regulator_dev *rdev;
133	struct sm5703_dev *sm5703 = dev_get_drvdata(pdev->dev.parent);
134	int i;
135
136	config.dev = dev->parent;
137	config.regmap = sm5703->regmap;
138
139	for (i = 0; i < SM5703_MAX_REGULATORS; i++) {
140		rdev = devm_regulator_register(dev,
141					       &sm5703_regulators_desc[i],
142					       &config);
143		if (IS_ERR(rdev))
144			return dev_err_probe(dev, PTR_ERR(rdev),
145					     "Failed to register a regulator\n");
146	}
147
148	return 0;
149}
150
151static const struct platform_device_id sm5703_regulator_id[] = {
152	{ "sm5703-regulator", 0 },
153	{}
154};
155MODULE_DEVICE_TABLE(platform, sm5703_regulator_id);
156
157static struct platform_driver sm5703_regulator_driver = {
158	.driver = {
159		.name = "sm5703-regulator",
160		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
161	},
162	.probe	= sm5703_regulator_probe,
163	.id_table	= sm5703_regulator_id,
164};
165
166module_platform_driver(sm5703_regulator_driver);
167
168MODULE_DESCRIPTION("Silicon Mitus SM5703 LDO/Buck/USB regulator driver");
169MODULE_AUTHOR("Markuss Broks <markuss.broks@gmail.com>");
170MODULE_LICENSE("GPL");
171