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 
11 enum 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 
22 static const int sm5703_ldo_voltagemap[] = {
23 	1500000, 1800000, 2600000, 2800000, 3000000, 3300000,
24 };
25 
26 static 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 
103 static 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 
112 static 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 
118 static 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 
sm5703_regulator_probe(struct platform_device * pdev)128 static 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 
151 static const struct platform_device_id sm5703_regulator_id[] = {
152 	{ "sm5703-regulator", 0 },
153 	{}
154 };
155 MODULE_DEVICE_TABLE(platform, sm5703_regulator_id);
156 
157 static 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 
166 module_platform_driver(sm5703_regulator_driver);
167 
168 MODULE_DESCRIPTION("Silicon Mitus SM5703 LDO/Buck/USB regulator driver");
169 MODULE_AUTHOR("Markuss Broks <markuss.broks@gmail.com>");
170 MODULE_LICENSE("GPL");
171