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gerrit-public.fairphone.software / kernel / msm-4.19 / f0168a9bfdfd6058c78207616348fed3cd52e739 / . / drivers / regulator / lp87565-regulator.c
blob: 71e7622925296b0123181e46ce1bdb2e193650ab [file] [log] [blame]
Keerthyf0168a92017-05-23 17:46:55 +0530[diff] [blame^]1/*
2 * Regulator driver for LP87565 PMIC
3 *
4 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/regmap.h>
15
16#include <linux/mfd/lp87565.h>
17
18#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \
19 _delay, _lr, _cr) \
20 [_id] = { \
21 .desc = { \
22 .name = _name, \
23 .supply_name = _of "-in", \
24 .id = _id, \
25 .of_match = of_match_ptr(_of), \
26 .regulators_node = of_match_ptr("regulators"),\
27 .ops = &_ops, \
28 .n_voltages = _n, \
29 .type = REGULATOR_VOLTAGE, \
30 .owner = THIS_MODULE, \
31 .vsel_reg = _vr, \
32 .vsel_mask = _vm, \
33 .enable_reg = _er, \
34 .enable_mask = _em, \
35 .ramp_delay = _delay, \
36 .linear_ranges = _lr, \
37 .n_linear_ranges = ARRAY_SIZE(_lr), \
38 }, \
39 .ctrl2_reg = _cr, \
40 }
41
42struct lp87565_regulator {
43 struct regulator_desc desc;
44 unsigned int ctrl2_reg;
45};
46
47static const struct lp87565_regulator regulators[];
48
49static const struct regulator_linear_range buck0_1_2_3_ranges[] = {
50 REGULATOR_LINEAR_RANGE(500000, 0x0, 0x17, 10000),
51 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
52 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
53};
54
55static unsigned int lp87565_buck_ramp_delay[] = {
56 30000, 15000, 10000, 7500, 3800, 1900, 940, 470
57};
58
59/* LP87565 BUCK current limit */
60static const unsigned int lp87565_buck_uA[] = {
61 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
62};
63
64static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
65 int ramp_delay)
66{
67 int id = rdev_get_id(rdev);
68 struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
69 unsigned int reg;
70 int ret;
71
72 if (ramp_delay <= 470)
73 reg = 7;
74 else if (ramp_delay <= 940)
75 reg = 6;
76 else if (ramp_delay <= 1900)
77 reg = 5;
78 else if (ramp_delay <= 3800)
79 reg = 4;
80 else if (ramp_delay <= 7500)
81 reg = 3;
82 else if (ramp_delay <= 10000)
83 reg = 2;
84 else if (ramp_delay <= 15000)
85 reg = 1;
86 else
87 reg = 0;
88
89 ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg,
90 LP87565_BUCK_CTRL_2_SLEW_RATE,
91 reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE));
92 if (ret) {
93 dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret);
94 return ret;
95 }
96
97 rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];
98
99 return 0;
100}
101
102static int lp87565_buck_set_current_limit(struct regulator_dev *rdev,
103 int min_uA, int max_uA)
104{
105 int id = rdev_get_id(rdev);
106 struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
107 int i;
108
109 for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) {
110 if (lp87565_buck_uA[i] >= min_uA &&
111 lp87565_buck_uA[i] <= max_uA)
112 return regmap_update_bits(lp87565->regmap,
113 regulators[id].ctrl2_reg,
114 LP87565_BUCK_CTRL_2_ILIM,
115 i << __ffs(LP87565_BUCK_CTRL_2_ILIM));
116 }
117
118 return -EINVAL;
119}
120
121static int lp87565_buck_get_current_limit(struct regulator_dev *rdev)
122{
123 int id = rdev_get_id(rdev);
124 struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
125 int ret;
126 unsigned int val;
127
128 ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val);
129 if (ret)
130 return ret;
131
132 val = (val & LP87565_BUCK_CTRL_2_ILIM) >>
133 __ffs(LP87565_BUCK_CTRL_2_ILIM);
134
135 return (val < ARRAY_SIZE(lp87565_buck_uA)) ?
136 lp87565_buck_uA[val] : -EINVAL;
137}
138
139/* Operations permitted on BUCK0, BUCK1 */
140static struct regulator_ops lp87565_buck_ops = {
141 .is_enabled = regulator_is_enabled_regmap,
142 .enable = regulator_enable_regmap,
143 .disable = regulator_disable_regmap,
144 .get_voltage_sel = regulator_get_voltage_sel_regmap,
145 .set_voltage_sel = regulator_set_voltage_sel_regmap,
146 .list_voltage = regulator_list_voltage_linear_range,
147 .map_voltage = regulator_map_voltage_linear_range,
148 .set_voltage_time_sel = regulator_set_voltage_time_sel,
149 .set_ramp_delay = lp87565_buck_set_ramp_delay,
150 .set_current_limit = lp87565_buck_set_current_limit,
151 .get_current_limit = lp87565_buck_get_current_limit,
152};
153
154static const struct lp87565_regulator regulators[] = {
155 LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,
156 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
157 LP87565_REG_BUCK0_CTRL_1,
158 LP87565_BUCK_CTRL_1_EN, 3800,
159 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
160 LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
161 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
162 LP87565_REG_BUCK1_CTRL_1,
163 LP87565_BUCK_CTRL_1_EN, 3800,
164 buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
165 LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
166 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
167 LP87565_REG_BUCK2_CTRL_1,
168 LP87565_BUCK_CTRL_1_EN, 3800,
169 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
170 LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
171 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
172 LP87565_REG_BUCK3_CTRL_1,
173 LP87565_BUCK_CTRL_1_EN, 3800,
174 buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
175 LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
176 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
177 LP87565_REG_BUCK0_CTRL_1,
178 LP87565_BUCK_CTRL_1_EN, 3800,
179 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
180 LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
181 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
182 LP87565_REG_BUCK2_CTRL_1,
183 LP87565_BUCK_CTRL_1_EN, 3800,
184 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
185};
186
187static int lp87565_regulator_probe(struct platform_device *pdev)
188{
189 struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
190 struct regulator_config config = { };
191 struct regulator_dev *rdev;
192 int i, min_idx = LP87565_BUCK_1, max_idx = LP87565_BUCK_3;
193
194 platform_set_drvdata(pdev, lp87565);
195
196 config.dev = &pdev->dev;
197 config.dev->of_node = lp87565->dev->of_node;
198 config.driver_data = lp87565;
199 config.regmap = lp87565->regmap;
200
201 if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) {
202 min_idx = LP87565_BUCK_10;
203 max_idx = LP87565_BUCK_23;
204 }
205
206 for (i = min_idx; i <= max_idx; i++) {
207 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
208 &config);
209 if (IS_ERR(rdev)) {
210 dev_err(lp87565->dev, "failed to register %s regulator\n",
211 pdev->name);
212 return PTR_ERR(rdev);
213 }
214 }
215
216 return 0;
217}
218
219static const struct platform_device_id lp87565_regulator_id_table[] = {
220 { "lp87565-regulator", },
221 { "lp87565-q1-regulator", },
222 { /* sentinel */ }
223};
224MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
225
226static struct platform_driver lp87565_regulator_driver = {
227 .driver = {
228 .name = "lp87565-pmic",
229 },
230 .probe = lp87565_regulator_probe,
231 .id_table = lp87565_regulator_id_table,
232};
233module_platform_driver(lp87565_regulator_driver);
234
235MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
236MODULE_DESCRIPTION("LP87565 voltage regulator driver");
237MODULE_LICENSE("GPL v2");