1 /*
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>
19 #include <linux/of.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22
23 #include <linux/mfd/tps65086.h>
24
25 enum 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), \
33 .regulators_node = "regulators", \
34 .of_parse_cb = tps65086_of_parse_cb, \
35 .id = _id, \
36 .ops = ®_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), \
57 .regulators_node = "regulators", \
58 .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
68 struct tps65086_regulator {
69 struct regulator_desc desc;
70 unsigned int decay_reg;
71 unsigned int decay_mask;
72 };
73
74 static const struct regulator_linear_range tps65086_10mv_ranges[] = {
75 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
76 REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
77 };
78
79 static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = {
80 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
81 REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
82 REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
83 };
84
85 static const struct regulator_linear_range tps65086_buck345_25mv_ranges[] = {
86 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
87 REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
88 };
89
90 static const struct regulator_linear_range tps65086_ldoa1_ranges[] = {
91 REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
92 REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
93 REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
94 REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
95 REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
96 };
97
98 static const struct regulator_linear_range tps65086_ldoa23_ranges[] = {
99 REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
100 REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
101 };
102
103 /* Operations permitted on regulators */
104 static struct regulator_ops reg_ops = {
105 .enable = regulator_enable_regmap,
106 .disable = regulator_disable_regmap,
107 .is_enabled = regulator_is_enabled_regmap,
108 .set_voltage_sel = regulator_set_voltage_sel_regmap,
109 .map_voltage = regulator_map_voltage_linear_range,
110 .get_voltage_sel = regulator_get_voltage_sel_regmap,
111 .list_voltage = regulator_list_voltage_linear_range,
112 };
113
114 /* Operations permitted on load switches */
115 static struct regulator_ops switch_ops = {
116 .enable = regulator_enable_regmap,
117 .disable = regulator_disable_regmap,
118 .is_enabled = regulator_is_enabled_regmap,
119 };
120
121 static int tps65086_of_parse_cb(struct device_node *dev,
122 const struct regulator_desc *desc,
123 struct regulator_config *config);
124
125 static struct tps65086_regulator regulators[] = {
126 TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
127 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
128 tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
129 BIT(0)),
130 TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
131 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
132 tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
133 BIT(0)),
134 TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
135 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
136 tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
137 BIT(0)),
138 TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
139 BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
140 tps65086_10mv_ranges, TPS65086_BUCK4VID,
141 BIT(0)),
142 TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
143 BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
144 tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
145 BIT(0)),
146 TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
147 BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
148 tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
149 BIT(0)),
150 TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
151 VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
152 tps65086_ldoa1_ranges, 0, 0),
153 TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
154 VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
155 tps65086_ldoa23_ranges, 0, 0),
156 TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
157 VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
158 tps65086_ldoa23_ranges, 0, 0),
159 TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
160 TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
161 TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
162 TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
163 };
164
tps65086_of_parse_cb(struct device_node * node,const struct regulator_desc * desc,struct regulator_config * config)165 static int tps65086_of_parse_cb(struct device_node *node,
166 const struct regulator_desc *desc,
167 struct regulator_config *config)
168 {
169 int ret;
170
171 /* Check for 25mV step mode */
172 if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
173 switch (desc->id) {
174 case BUCK1:
175 case BUCK2:
176 case BUCK6:
177 regulators[desc->id].desc.linear_ranges =
178 tps65086_buck126_25mv_ranges;
179 regulators[desc->id].desc.n_linear_ranges =
180 ARRAY_SIZE(tps65086_buck126_25mv_ranges);
181 break;
182 case BUCK3:
183 case BUCK4:
184 case BUCK5:
185 regulators[desc->id].desc.linear_ranges =
186 tps65086_buck345_25mv_ranges;
187 regulators[desc->id].desc.n_linear_ranges =
188 ARRAY_SIZE(tps65086_buck345_25mv_ranges);
189 break;
190 default:
191 dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
192 }
193 }
194
195 /* Check for decay mode */
196 if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
197 ret = regmap_write_bits(config->regmap,
198 regulators[desc->id].decay_reg,
199 regulators[desc->id].decay_mask,
200 regulators[desc->id].decay_mask);
201 if (ret) {
202 dev_err(config->dev, "Error setting decay\n");
203 return ret;
204 }
205 }
206
207 return 0;
208 }
209
tps65086_regulator_probe(struct platform_device * pdev)210 static int tps65086_regulator_probe(struct platform_device *pdev)
211 {
212 struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
213 struct regulator_config config = { };
214 struct regulator_dev *rdev;
215 int i;
216
217 platform_set_drvdata(pdev, tps);
218
219 config.dev = &pdev->dev;
220 config.dev->of_node = tps->dev->of_node;
221 config.driver_data = tps;
222 config.regmap = tps->regmap;
223
224 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
225 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc,
226 &config);
227 if (IS_ERR(rdev)) {
228 dev_err(tps->dev, "failed to register %s regulator\n",
229 pdev->name);
230 return PTR_ERR(rdev);
231 }
232 }
233
234 return 0;
235 }
236
237 static const struct platform_device_id tps65086_regulator_id_table[] = {
238 { "tps65086-regulator", },
239 { /* sentinel */ }
240 };
241 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
242
243 static struct platform_driver tps65086_regulator_driver = {
244 .driver = {
245 .name = "tps65086-regulator",
246 },
247 .probe = tps65086_regulator_probe,
248 .id_table = tps65086_regulator_id_table,
249 };
250 module_platform_driver(tps65086_regulator_driver);
251
252 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
253 MODULE_DESCRIPTION("TPS65086 Regulator driver");
254 MODULE_LICENSE("GPL v2");
255