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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 | |
580331d0 | 8 | * Free Software Foundation version 2. |
f0168a9b K |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/regmap.h> | |
14 | ||
15 | #include <linux/mfd/lp87565.h> | |
16 | ||
17 | #define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ | |
18 | _delay, _lr, _cr) \ | |
19 | [_id] = { \ | |
20 | .desc = { \ | |
21 | .name = _name, \ | |
22 | .supply_name = _of "-in", \ | |
23 | .id = _id, \ | |
24 | .of_match = of_match_ptr(_of), \ | |
25 | .regulators_node = of_match_ptr("regulators"),\ | |
26 | .ops = &_ops, \ | |
27 | .n_voltages = _n, \ | |
28 | .type = REGULATOR_VOLTAGE, \ | |
29 | .owner = THIS_MODULE, \ | |
30 | .vsel_reg = _vr, \ | |
31 | .vsel_mask = _vm, \ | |
32 | .enable_reg = _er, \ | |
33 | .enable_mask = _em, \ | |
34 | .ramp_delay = _delay, \ | |
35 | .linear_ranges = _lr, \ | |
36 | .n_linear_ranges = ARRAY_SIZE(_lr), \ | |
37 | }, \ | |
38 | .ctrl2_reg = _cr, \ | |
39 | } | |
40 | ||
41 | struct lp87565_regulator { | |
42 | struct regulator_desc desc; | |
43 | unsigned int ctrl2_reg; | |
44 | }; | |
45 | ||
46 | static const struct lp87565_regulator regulators[]; | |
47 | ||
48 | static const struct regulator_linear_range buck0_1_2_3_ranges[] = { | |
42f1ea48 | 49 | REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000), |
f0168a9b K |
50 | REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), |
51 | REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), | |
52 | }; | |
53 | ||
54 | static unsigned int lp87565_buck_ramp_delay[] = { | |
55 | 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 | |
56 | }; | |
57 | ||
58 | /* LP87565 BUCK current limit */ | |
59 | static const unsigned int lp87565_buck_uA[] = { | |
60 | 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, | |
61 | }; | |
62 | ||
63 | static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev, | |
64 | int ramp_delay) | |
65 | { | |
66 | int id = rdev_get_id(rdev); | |
67 | struct lp87565 *lp87565 = rdev_get_drvdata(rdev); | |
68 | unsigned int reg; | |
69 | int ret; | |
70 | ||
71 | if (ramp_delay <= 470) | |
72 | reg = 7; | |
73 | else if (ramp_delay <= 940) | |
74 | reg = 6; | |
75 | else if (ramp_delay <= 1900) | |
76 | reg = 5; | |
77 | else if (ramp_delay <= 3800) | |
78 | reg = 4; | |
79 | else if (ramp_delay <= 7500) | |
80 | reg = 3; | |
81 | else if (ramp_delay <= 10000) | |
82 | reg = 2; | |
83 | else if (ramp_delay <= 15000) | |
84 | reg = 1; | |
85 | else | |
86 | reg = 0; | |
87 | ||
88 | ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg, | |
89 | LP87565_BUCK_CTRL_2_SLEW_RATE, | |
90 | reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); | |
91 | if (ret) { | |
92 | dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; | |
97 | ||
2d045e94 K |
98 | /* Conservatively give a 15% margin */ |
99 | rdev->constraints->ramp_delay = | |
100 | rdev->constraints->ramp_delay * 85 / 100; | |
101 | ||
f0168a9b K |
102 | return 0; |
103 | } | |
104 | ||
105 | static int lp87565_buck_set_current_limit(struct regulator_dev *rdev, | |
106 | int min_uA, int max_uA) | |
107 | { | |
108 | int id = rdev_get_id(rdev); | |
109 | struct lp87565 *lp87565 = rdev_get_drvdata(rdev); | |
110 | int i; | |
111 | ||
112 | for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) { | |
113 | if (lp87565_buck_uA[i] >= min_uA && | |
114 | lp87565_buck_uA[i] <= max_uA) | |
115 | return regmap_update_bits(lp87565->regmap, | |
116 | regulators[id].ctrl2_reg, | |
117 | LP87565_BUCK_CTRL_2_ILIM, | |
118 | i << __ffs(LP87565_BUCK_CTRL_2_ILIM)); | |
119 | } | |
120 | ||
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | static int lp87565_buck_get_current_limit(struct regulator_dev *rdev) | |
125 | { | |
126 | int id = rdev_get_id(rdev); | |
127 | struct lp87565 *lp87565 = rdev_get_drvdata(rdev); | |
128 | int ret; | |
129 | unsigned int val; | |
130 | ||
131 | ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val); | |
132 | if (ret) | |
133 | return ret; | |
134 | ||
135 | val = (val & LP87565_BUCK_CTRL_2_ILIM) >> | |
136 | __ffs(LP87565_BUCK_CTRL_2_ILIM); | |
137 | ||
138 | return (val < ARRAY_SIZE(lp87565_buck_uA)) ? | |
139 | lp87565_buck_uA[val] : -EINVAL; | |
140 | } | |
141 | ||
142 | /* Operations permitted on BUCK0, BUCK1 */ | |
143 | static struct regulator_ops lp87565_buck_ops = { | |
144 | .is_enabled = regulator_is_enabled_regmap, | |
145 | .enable = regulator_enable_regmap, | |
146 | .disable = regulator_disable_regmap, | |
147 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
148 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
149 | .list_voltage = regulator_list_voltage_linear_range, | |
150 | .map_voltage = regulator_map_voltage_linear_range, | |
151 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
152 | .set_ramp_delay = lp87565_buck_set_ramp_delay, | |
153 | .set_current_limit = lp87565_buck_set_current_limit, | |
154 | .get_current_limit = lp87565_buck_get_current_limit, | |
155 | }; | |
156 | ||
157 | static const struct lp87565_regulator regulators[] = { | |
158 | LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, | |
159 | 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, | |
160 | LP87565_REG_BUCK0_CTRL_1, | |
2d045e94 | 161 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
162 | buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
163 | LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, | |
164 | 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, | |
165 | LP87565_REG_BUCK1_CTRL_1, | |
2d045e94 | 166 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
167 | buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), |
168 | LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, | |
169 | 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, | |
170 | LP87565_REG_BUCK2_CTRL_1, | |
2d045e94 | 171 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
172 | buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
173 | LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, | |
174 | 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, | |
175 | LP87565_REG_BUCK3_CTRL_1, | |
2d045e94 | 176 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
177 | buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), |
178 | LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, | |
179 | 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, | |
180 | LP87565_REG_BUCK0_CTRL_1, | |
2f51a260 K |
181 | LP87565_BUCK_CTRL_1_EN | |
182 | LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, | |
f0168a9b K |
183 | buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
184 | LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, | |
185 | 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, | |
186 | LP87565_REG_BUCK2_CTRL_1, | |
2d045e94 | 187 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
188 | buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
189 | }; | |
190 | ||
191 | static int lp87565_regulator_probe(struct platform_device *pdev) | |
192 | { | |
193 | struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); | |
194 | struct regulator_config config = { }; | |
195 | struct regulator_dev *rdev; | |
196 | int i, min_idx = LP87565_BUCK_1, max_idx = LP87565_BUCK_3; | |
197 | ||
198 | platform_set_drvdata(pdev, lp87565); | |
199 | ||
200 | config.dev = &pdev->dev; | |
201 | config.dev->of_node = lp87565->dev->of_node; | |
202 | config.driver_data = lp87565; | |
203 | config.regmap = lp87565->regmap; | |
204 | ||
205 | if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) { | |
206 | min_idx = LP87565_BUCK_10; | |
207 | max_idx = LP87565_BUCK_23; | |
208 | } | |
209 | ||
210 | for (i = min_idx; i <= max_idx; i++) { | |
211 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, | |
212 | &config); | |
213 | if (IS_ERR(rdev)) { | |
214 | dev_err(lp87565->dev, "failed to register %s regulator\n", | |
215 | pdev->name); | |
216 | return PTR_ERR(rdev); | |
217 | } | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static const struct platform_device_id lp87565_regulator_id_table[] = { | |
224 | { "lp87565-regulator", }, | |
225 | { "lp87565-q1-regulator", }, | |
226 | { /* sentinel */ } | |
227 | }; | |
228 | MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); | |
229 | ||
230 | static struct platform_driver lp87565_regulator_driver = { | |
231 | .driver = { | |
232 | .name = "lp87565-pmic", | |
233 | }, | |
234 | .probe = lp87565_regulator_probe, | |
235 | .id_table = lp87565_regulator_id_table, | |
236 | }; | |
237 | module_platform_driver(lp87565_regulator_driver); | |
238 | ||
239 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
240 | MODULE_DESCRIPTION("LP87565 voltage regulator driver"); | |
241 | MODULE_LICENSE("GPL v2"); |