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Andrew F. Davisd2a2e722015-11-04 11:12:14 -06001/*
2 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
3 *
4 * Author: Andrew F. Davis <afd@ti.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 version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11 * kind, whether expressed or implied; without even the implied warranty
12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details.
14 *
15 * Based on the TPS65912 driver
16 */
17
18#include <linux/module.h>
Andrew F. Davis7f9354f2015-12-01 12:44:03 -060019#include <linux/of.h>
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060020#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060022
23#include <linux/mfd/tps65086.h>
24
25enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
26 LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };
27
28#define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm) \
29 [_id] = { \
30 .desc = { \
31 .name = _name, \
32 .of_match = of_match_ptr(_of), \
Andrew F. Davis7f9354f2015-12-01 12:44:03 -060033 .regulators_node = "regulators", \
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060034 .of_parse_cb = tps65086_of_parse_cb, \
35 .id = _id, \
36 .ops = &reg_ops, \
37 .n_voltages = _nv, \
38 .type = REGULATOR_VOLTAGE, \
39 .owner = THIS_MODULE, \
40 .vsel_reg = _vr, \
41 .vsel_mask = _vm, \
42 .enable_reg = _er, \
43 .enable_mask = _em, \
44 .volt_table = NULL, \
45 .linear_ranges = _lr, \
46 .n_linear_ranges = ARRAY_SIZE(_lr), \
47 }, \
48 .decay_reg = _dr, \
49 .decay_mask = _dm, \
50 }
51
52#define TPS65086_SWITCH(_name, _of, _id, _er, _em) \
53 [_id] = { \
54 .desc = { \
55 .name = _name, \
56 .of_match = of_match_ptr(_of), \
Andrew F. Davis7f9354f2015-12-01 12:44:03 -060057 .regulators_node = "regulators", \
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060058 .of_parse_cb = tps65086_of_parse_cb, \
59 .id = _id, \
60 .ops = &switch_ops, \
61 .type = REGULATOR_VOLTAGE, \
62 .owner = THIS_MODULE, \
63 .enable_reg = _er, \
64 .enable_mask = _em, \
65 }, \
66 }
67
68struct tps65086_regulator {
69 struct regulator_desc desc;
70 unsigned int decay_reg;
71 unsigned int decay_mask;
72};
73
Andrew F. Davis8ac055a2016-12-01 10:44:16 -060074static const struct regulator_linear_range tps65086_10mv_ranges[] = {
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060075 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
76 REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
77};
78
79static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = {
Andrew F. Davis8ac055a2016-12-01 10:44:16 -060080 REGULATOR_LINEAR_RANGE(1000000, 0x0, 0x18, 0),
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060081 REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
82};
83
Andrew F. Davis8ac055a2016-12-01 10:44:16 -060084static const struct regulator_linear_range tps65086_buck345_25mv_ranges[] = {
Andrew F. Davisd2a2e722015-11-04 11:12:14 -060085 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
86 REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
87};
88
89static const struct regulator_linear_range tps65086_ldoa1_ranges[] = {
90 REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
91 REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
92 REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xA, 100000),
93 REGULATOR_LINEAR_RANGE(2700000, 0xB, 0xD, 150000),
94 REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
95};
96
97static const struct regulator_linear_range tps65086_ldoa23_ranges[] = {
98 REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
99 REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
100};
101
102/* Operations permitted on regulators */
103static struct regulator_ops reg_ops = {
104 .enable = regulator_enable_regmap,
105 .disable = regulator_disable_regmap,
106 .is_enabled = regulator_is_enabled_regmap,
107 .set_voltage_sel = regulator_set_voltage_sel_regmap,
108 .map_voltage = regulator_map_voltage_linear_range,
109 .get_voltage_sel = regulator_get_voltage_sel_regmap,
110 .list_voltage = regulator_list_voltage_linear_range,
111};
112
113/* Operations permitted on load switches */
114static struct regulator_ops switch_ops = {
115 .enable = regulator_enable_regmap,
116 .disable = regulator_disable_regmap,
117 .is_enabled = regulator_is_enabled_regmap,
118};
119
120static int tps65086_of_parse_cb(struct device_node *dev,
121 const struct regulator_desc *desc,
122 struct regulator_config *config);
123
124static struct tps65086_regulator regulators[] = {
125 TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
126 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600127 tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600128 BIT(0)),
129 TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
130 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600131 tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600132 BIT(0)),
133 TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
134 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600135 tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600136 BIT(0)),
137 TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
138 BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600139 tps65086_10mv_ranges, TPS65086_BUCK4VID,
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600140 BIT(0)),
141 TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
142 BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600143 tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600144 BIT(0)),
145 TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
146 BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600147 tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600148 BIT(0)),
149 TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
150 VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
151 tps65086_ldoa1_ranges, 0, 0),
152 TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
153 VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
154 tps65086_ldoa23_ranges, 0, 0),
155 TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
156 VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
157 tps65086_ldoa23_ranges, 0, 0),
158 TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
159 TPS65086_SWITCH("SWB1", "swa2", SWB1, TPS65086_SWVTT_EN, BIT(6)),
160 TPS65086_SWITCH("SWB2", "swa3", SWB2, TPS65086_SWVTT_EN, BIT(7)),
161 TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
162};
163
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600164static int tps65086_of_parse_cb(struct device_node *dev,
165 const struct regulator_desc *desc,
166 struct regulator_config *config)
167{
168 int ret;
169
170 /* Check for 25mV step mode */
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600171 if (of_property_read_bool(config->of_node, "ti,regulator-step-size-25mv")) {
172 switch (desc->id) {
173 case BUCK1:
174 case BUCK2:
175 case BUCK6:
176 regulators[desc->id].desc.linear_ranges =
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600177 tps65086_buck126_25mv_ranges;
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600178 regulators[desc->id].desc.n_linear_ranges =
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600179 ARRAY_SIZE(tps65086_buck126_25mv_ranges);
Andrew F. Davis8ac055a2016-12-01 10:44:16 -0600180 break;
181 case BUCK3:
182 case BUCK4:
183 case BUCK5:
184 regulators[desc->id].desc.linear_ranges =
185 tps65086_buck345_25mv_ranges;
186 regulators[desc->id].desc.n_linear_ranges =
187 ARRAY_SIZE(tps65086_buck345_25mv_ranges);
188 break;
189 default:
190 dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
191 }
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600192 }
193
194 /* Check for decay mode */
195 if (desc->id <= BUCK6 && of_property_read_bool(config->of_node, "ti,regulator-decay")) {
196 ret = regmap_write_bits(config->regmap,
197 regulators[desc->id].decay_reg,
198 regulators[desc->id].decay_mask,
199 regulators[desc->id].decay_mask);
200 if (ret) {
201 dev_err(config->dev, "Error setting decay\n");
202 return ret;
203 }
204 }
205
206 return 0;
207}
208
209static int tps65086_regulator_probe(struct platform_device *pdev)
210{
211 struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
212 struct regulator_config config = { };
213 struct regulator_dev *rdev;
214 int i;
215
216 platform_set_drvdata(pdev, tps);
217
218 config.dev = &pdev->dev;
Andrew F. Davis7f9354f2015-12-01 12:44:03 -0600219 config.dev->of_node = tps->dev->of_node;
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600220 config.driver_data = tps;
Andrew F. Davisd2a2e722015-11-04 11:12:14 -0600221 config.regmap = tps->regmap;
222
223 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
224 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
225 &config);
226 if (IS_ERR(rdev)) {
227 dev_err(tps->dev, "failed to register %s regulator\n",
228 pdev->name);
229 return PTR_ERR(rdev);
230 }
231 }
232
233 return 0;
234}
235
236static const struct platform_device_id tps65086_regulator_id_table[] = {
237 { "tps65086-regulator", },
238 { /* sentinel */ }
239};
240MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
241
242static struct platform_driver tps65086_regulator_driver = {
243 .driver = {
244 .name = "tps65086-regulator",
245 },
246 .probe = tps65086_regulator_probe,
247 .id_table = tps65086_regulator_id_table,
248};
249module_platform_driver(tps65086_regulator_driver);
250
251MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
252MODULE_DESCRIPTION("TPS65086 Regulator driver");
253MODULE_LICENSE("GPL v2");