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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Regulator driver for LP87565 PMIC
4 *
5 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
6 */
7
8#include <linux/bitfield.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/regmap.h>
12
13#include <linux/mfd/lp87565.h>
14
15enum LP87565_regulator_id {
16 /* BUCK's */
17 LP87565_BUCK_0,
18 LP87565_BUCK_1,
19 LP87565_BUCK_2,
20 LP87565_BUCK_3,
21 LP87565_BUCK_10,
22 LP87565_BUCK_23,
23 LP87565_BUCK_3210,
24};
25
26#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, \
27 _er, _em, _ev, _delay, _lr, _cr) \
28 [_id] = { \
29 .desc = { \
30 .name = _name, \
31 .supply_name = _of "-in", \
32 .id = _id, \
33 .of_match = _of, \
34 .regulators_node = "regulators", \
35 .ops = &_ops, \
36 .n_voltages = _n, \
37 .type = REGULATOR_VOLTAGE, \
38 .owner = THIS_MODULE, \
39 .vsel_reg = _vr, \
40 .vsel_mask = _vm, \
41 .enable_reg = _er, \
42 .enable_mask = _em, \
43 .enable_val = _ev, \
44 .ramp_delay = _delay, \
45 .linear_ranges = _lr, \
46 .n_linear_ranges = ARRAY_SIZE(_lr), \
47 .curr_table = lp87565_buck_uA, \
48 .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\
49 .csel_reg = (_cr), \
50 .csel_mask = LP87565_BUCK_CTRL_2_ILIM, \
51 }, \
52 .ctrl2_reg = _cr, \
53 }
54
55struct lp87565_regulator {
56 struct regulator_desc desc;
57 unsigned int ctrl2_reg;
58};
59
60static const struct lp87565_regulator regulators[];
61
62static const struct linear_range buck0_1_2_3_ranges[] = {
63 REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
64 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
65 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
66};
67
68static const unsigned int lp87565_buck_ramp_delay[] = {
69 30000, 15000, 10000, 7500, 3800, 1900, 940, 470
70};
71
72/* LP87565 BUCK current limit */
73static const unsigned int lp87565_buck_uA[] = {
74 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
75};
76
77static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
78 int ramp_delay)
79{
80 int id = rdev_get_id(rdev);
81 unsigned int reg;
82 int ret;
83
84 if (ramp_delay <= 470)
85 reg = 7;
86 else if (ramp_delay <= 940)
87 reg = 6;
88 else if (ramp_delay <= 1900)
89 reg = 5;
90 else if (ramp_delay <= 3800)
91 reg = 4;
92 else if (ramp_delay <= 7500)
93 reg = 3;
94 else if (ramp_delay <= 10000)
95 reg = 2;
96 else if (ramp_delay <= 15000)
97 reg = 1;
98 else
99 reg = 0;
100
101 ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg,
102 LP87565_BUCK_CTRL_2_SLEW_RATE,
103 FIELD_PREP(LP87565_BUCK_CTRL_2_SLEW_RATE, reg));
104 if (ret) {
105 dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret);
106 return ret;
107 }
108
109 rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];
110
111 /* Conservatively give a 15% margin */
112 rdev->constraints->ramp_delay =
113 rdev->constraints->ramp_delay * 85 / 100;
114
115 return 0;
116}
117
118/* Operations permitted on BUCKs */
119static const struct regulator_ops lp87565_buck_ops = {
120 .is_enabled = regulator_is_enabled_regmap,
121 .enable = regulator_enable_regmap,
122 .disable = regulator_disable_regmap,
123 .get_voltage_sel = regulator_get_voltage_sel_regmap,
124 .set_voltage_sel = regulator_set_voltage_sel_regmap,
125 .list_voltage = regulator_list_voltage_linear_range,
126 .map_voltage = regulator_map_voltage_linear_range,
127 .set_voltage_time_sel = regulator_set_voltage_time_sel,
128 .set_ramp_delay = lp87565_buck_set_ramp_delay,
129 .set_current_limit = regulator_set_current_limit_regmap,
130 .get_current_limit = regulator_get_current_limit_regmap,
131};
132
133static const struct lp87565_regulator regulators[] = {
134 LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,
135 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
136 LP87565_REG_BUCK0_CTRL_1,
137 LP87565_BUCK_CTRL_1_EN |
138 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
139 LP87565_BUCK_CTRL_1_EN, 3230,
140 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
141 LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
142 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
143 LP87565_REG_BUCK1_CTRL_1,
144 LP87565_BUCK_CTRL_1_EN |
145 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
146 LP87565_BUCK_CTRL_1_EN, 3230,
147 buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
148 LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
149 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
150 LP87565_REG_BUCK2_CTRL_1,
151 LP87565_BUCK_CTRL_1_EN |
152 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
153 LP87565_BUCK_CTRL_1_EN, 3230,
154 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
155 LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
156 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
157 LP87565_REG_BUCK3_CTRL_1,
158 LP87565_BUCK_CTRL_1_EN |
159 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
160 LP87565_BUCK_CTRL_1_EN, 3230,
161 buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
162 LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
163 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
164 LP87565_REG_BUCK0_CTRL_1,
165 LP87565_BUCK_CTRL_1_EN |
166 LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
167 LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
168 LP87565_BUCK_CTRL_1_EN |
169 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
170 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
171 LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
172 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
173 LP87565_REG_BUCK2_CTRL_1,
174 LP87565_BUCK_CTRL_1_EN |
175 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
176 LP87565_BUCK_CTRL_1_EN, 3230,
177 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
178 LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210",
179 lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT,
180 LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1,
181 LP87565_BUCK_CTRL_1_EN |
182 LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
183 LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
184 LP87565_BUCK_CTRL_1_EN |
185 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
186 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
187};
188
189static int lp87565_regulator_probe(struct platform_device *pdev)
190{
191 struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
192 struct regulator_config config = { };
193 struct regulator_dev *rdev;
194 int i, min_idx, max_idx;
195
196 platform_set_drvdata(pdev, lp87565);
197
198 config.dev = &pdev->dev;
199 config.dev->of_node = lp87565->dev->of_node;
200 config.driver_data = lp87565;
201 config.regmap = lp87565->regmap;
202
203 switch (lp87565->dev_type) {
204 case LP87565_DEVICE_TYPE_LP87565_Q1:
205 min_idx = LP87565_BUCK_10;
206 max_idx = LP87565_BUCK_23;
207 break;
208 case LP87565_DEVICE_TYPE_LP87561_Q1:
209 min_idx = LP87565_BUCK_3210;
210 max_idx = LP87565_BUCK_3210;
211 break;
212 default:
213 min_idx = LP87565_BUCK_0;
214 max_idx = LP87565_BUCK_3;
215 break;
216 }
217
218 for (i = min_idx; i <= max_idx; i++) {
219 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc,
220 &config);
221 if (IS_ERR(rdev)) {
222 dev_err(lp87565->dev, "failed to register %s regulator\n",
223 pdev->name);
224 return PTR_ERR(rdev);
225 }
226 }
227
228 return 0;
229}
230
231static const struct platform_device_id lp87565_regulator_id_table[] = {
232 { "lp87565-regulator", },
233 { "lp87565-q1-regulator", },
234 { /* sentinel */ }
235};
236MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
237
238static struct platform_driver lp87565_regulator_driver = {
239 .driver = {
240 .name = "lp87565-pmic",
241 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
242 },
243 .probe = lp87565_regulator_probe,
244 .id_table = lp87565_regulator_id_table,
245};
246module_platform_driver(lp87565_regulator_driver);
247
248MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
249MODULE_DESCRIPTION("LP87565 voltage regulator driver");
250MODULE_LICENSE("GPL v2");