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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
17enum 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 = ®_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
60struct tps65086_regulator {
61 struct regulator_desc desc;
62 unsigned int decay_reg;
63 unsigned int decay_mask;
64};
65
66static 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
71static 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
77static 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
82static 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
90static 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 */
96static 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 */
107static 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
113static int tps65086_of_parse_cb(struct device_node *dev,
114 const struct regulator_desc *desc,
115 struct regulator_config *config);
116
117static 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
157static 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
202static 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, ®ulators[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
229static const struct platform_device_id tps65086_regulator_id_table[] = {
230 { "tps65086-regulator", },
231 { /* sentinel */ }
232};
233MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
234
235static struct platform_driver tps65086_regulator_driver = {
236 .driver = {
237 .name = "tps65086-regulator",
238 },
239 .probe = tps65086_regulator_probe,
240 .id_table = tps65086_regulator_id_table,
241};
242module_platform_driver(tps65086_regulator_driver);
243
244MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
245MODULE_DESCRIPTION("TPS65086 Regulator driver");
246MODULE_LICENSE("GPL v2");