1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
4  *
5  * Author: Andrew F. Davis <afd@ti.com>
6  *
7  * Based on the TPS65912 driver
8  */
9 
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/platform_device.h>
13 #include <linux/regulator/driver.h>
14 
15 #include <linux/mfd/tps65086.h>
16 
17 enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
18 	LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };
19 
20 #define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm)	\
21 	[_id] = {							\
22 		.desc = {						\
23 			.name			= _name,		\
24 			.of_match		= of_match_ptr(_of),	\
25 			.regulators_node	= "regulators",		\
26 			.of_parse_cb		= tps65086_of_parse_cb,	\
27 			.id			= _id,			\
28 			.ops			= &reg_ops,		\
29 			.n_voltages		= _nv,			\
30 			.type			= REGULATOR_VOLTAGE,	\
31 			.owner			= THIS_MODULE,		\
32 			.vsel_reg		= _vr,			\
33 			.vsel_mask		= _vm,			\
34 			.enable_reg		= _er,			\
35 			.enable_mask		= _em,			\
36 			.volt_table		= NULL,			\
37 			.linear_ranges		= _lr,			\
38 			.n_linear_ranges	= ARRAY_SIZE(_lr),	\
39 		},							\
40 		.decay_reg = _dr,					\
41 		.decay_mask = _dm,					\
42 	}
43 
44 #define TPS65086_SWITCH(_name, _of, _id, _er, _em)			\
45 	[_id] = {							\
46 		.desc = {						\
47 			.name			= _name,		\
48 			.of_match		= of_match_ptr(_of),	\
49 			.regulators_node	= "regulators",		\
50 			.of_parse_cb		= tps65086_of_parse_cb,	\
51 			.id			= _id,			\
52 			.ops			= &switch_ops,		\
53 			.type			= REGULATOR_VOLTAGE,	\
54 			.owner			= THIS_MODULE,		\
55 			.enable_reg		= _er,			\
56 			.enable_mask		= _em,			\
57 		},							\
58 	}
59 
60 struct tps65086_regulator {
61 	struct regulator_desc desc;
62 	unsigned int decay_reg;
63 	unsigned int decay_mask;
64 };
65 
66 static const struct linear_range tps65086_10mv_ranges[] = {
67 	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
68 	REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
69 };
70 
71 static const struct linear_range tps65086_buck126_25mv_ranges[] = {
72 	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
73 	REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
74 	REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
75 };
76 
77 static const struct linear_range tps65086_buck345_25mv_ranges[] = {
78 	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
79 	REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
80 };
81 
82 static const struct linear_range tps65086_ldoa1_ranges[] = {
83 	REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
84 	REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
85 	REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
86 	REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
87 	REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
88 };
89 
90 static const struct linear_range tps65086_ldoa23_ranges[] = {
91 	REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
92 	REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
93 };
94 
95 /* Operations permitted on regulators */
96 static const struct regulator_ops reg_ops = {
97 	.enable			= regulator_enable_regmap,
98 	.disable		= regulator_disable_regmap,
99 	.is_enabled		= regulator_is_enabled_regmap,
100 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
101 	.map_voltage		= regulator_map_voltage_linear_range,
102 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
103 	.list_voltage		= regulator_list_voltage_linear_range,
104 };
105 
106 /* Operations permitted on load switches */
107 static const struct regulator_ops switch_ops = {
108 	.enable			= regulator_enable_regmap,
109 	.disable		= regulator_disable_regmap,
110 	.is_enabled		= regulator_is_enabled_regmap,
111 };
112 
113 static int tps65086_of_parse_cb(struct device_node *dev,
114 				const struct regulator_desc *desc,
115 				struct regulator_config *config);
116 
117 static struct tps65086_regulator regulators[] = {
118 	TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
119 			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
120 			   tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
121 			   BIT(0)),
122 	TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
123 			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
124 			   tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
125 			   BIT(0)),
126 	TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
127 			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
128 			   tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
129 			   BIT(0)),
130 	TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
131 			   BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
132 			   tps65086_10mv_ranges, TPS65086_BUCK4VID,
133 			   BIT(0)),
134 	TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
135 			   BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
136 			   tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
137 			   BIT(0)),
138 	TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
139 			   BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
140 			   tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
141 			   BIT(0)),
142 	TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
143 			   VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
144 			   tps65086_ldoa1_ranges, 0, 0),
145 	TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
146 			   VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
147 			   tps65086_ldoa23_ranges, 0, 0),
148 	TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
149 			   VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
150 			   tps65086_ldoa23_ranges, 0, 0),
151 	TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
152 	TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
153 	TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
154 	TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
155 };
156 
157 static int tps65086_of_parse_cb(struct device_node *node,
158 				const struct regulator_desc *desc,
159 				struct regulator_config *config)
160 {
161 	int ret;
162 
163 	/* Check for 25mV step mode */
164 	if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
165 		switch (desc->id) {
166 		case BUCK1:
167 		case BUCK2:
168 		case BUCK6:
169 			regulators[desc->id].desc.linear_ranges =
170 				tps65086_buck126_25mv_ranges;
171 			regulators[desc->id].desc.n_linear_ranges =
172 				ARRAY_SIZE(tps65086_buck126_25mv_ranges);
173 			break;
174 		case BUCK3:
175 		case BUCK4:
176 		case BUCK5:
177 			regulators[desc->id].desc.linear_ranges =
178 				tps65086_buck345_25mv_ranges;
179 			regulators[desc->id].desc.n_linear_ranges =
180 				ARRAY_SIZE(tps65086_buck345_25mv_ranges);
181 			break;
182 		default:
183 			dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
184 		}
185 	}
186 
187 	/* Check for decay mode */
188 	if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
189 		ret = regmap_write_bits(config->regmap,
190 					regulators[desc->id].decay_reg,
191 					regulators[desc->id].decay_mask,
192 					regulators[desc->id].decay_mask);
193 		if (ret) {
194 			dev_err(config->dev, "Error setting decay\n");
195 			return ret;
196 		}
197 	}
198 
199 	return 0;
200 }
201 
202 static int tps65086_regulator_probe(struct platform_device *pdev)
203 {
204 	struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
205 	struct regulator_config config = { };
206 	struct regulator_dev *rdev;
207 	int i;
208 
209 	platform_set_drvdata(pdev, tps);
210 
211 	config.dev = &pdev->dev;
212 	config.dev->of_node = tps->dev->of_node;
213 	config.driver_data = tps;
214 	config.regmap = tps->regmap;
215 
216 	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
217 		rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
218 					       &config);
219 		if (IS_ERR(rdev)) {
220 			dev_err(tps->dev, "failed to register %s regulator\n",
221 				pdev->name);
222 			return PTR_ERR(rdev);
223 		}
224 	}
225 
226 	return 0;
227 }
228 
229 static const struct platform_device_id tps65086_regulator_id_table[] = {
230 	{ "tps65086-regulator", },
231 	{ /* sentinel */ }
232 };
233 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
234 
235 static struct platform_driver tps65086_regulator_driver = {
236 	.driver = {
237 		.name = "tps65086-regulator",
238 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
239 	},
240 	.probe = tps65086_regulator_probe,
241 	.id_table = tps65086_regulator_id_table,
242 };
243 module_platform_driver(tps65086_regulator_driver);
244 
245 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
246 MODULE_DESCRIPTION("TPS65086 Regulator driver");
247 MODULE_LICENSE("GPL v2");
248