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 | |
15 | enum 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 | |
55 | struct lp87565_regulator { |
56 | struct regulator_desc desc; |
57 | unsigned int ctrl2_reg; |
58 | }; |
59 | |
60 | static const struct lp87565_regulator regulators[]; |
61 | |
62 | static 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 | |
68 | static const unsigned int lp87565_buck_ramp_delay[] = { |
69 | 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 |
70 | }; |
71 | |
72 | /* LP87565 BUCK current limit */ |
73 | static const unsigned int lp87565_buck_uA[] = { |
74 | 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, |
75 | }; |
76 | |
77 | static 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(map: rdev->regmap, reg: 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 */ |
119 | static 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 | |
133 | static 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 | |
189 | static int lp87565_regulator_probe(struct platform_device *pdev) |
190 | { |
191 | struct lp87565 *lp87565 = dev_get_drvdata(dev: 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, data: 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(dev: &pdev->dev, regulator_desc: ®ulators[i].desc, |
220 | config: &config); |
221 | if (IS_ERR(ptr: rdev)) { |
222 | dev_err(lp87565->dev, "failed to register %s regulator\n" , |
223 | pdev->name); |
224 | return PTR_ERR(ptr: rdev); |
225 | } |
226 | } |
227 | |
228 | return 0; |
229 | } |
230 | |
231 | static const struct platform_device_id lp87565_regulator_id_table[] = { |
232 | { "lp87565-regulator" , }, |
233 | { "lp87565-q1-regulator" , }, |
234 | { /* sentinel */ } |
235 | }; |
236 | MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); |
237 | |
238 | static 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 | }; |
246 | module_platform_driver(lp87565_regulator_driver); |
247 | |
248 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>" ); |
249 | MODULE_DESCRIPTION("LP87565 voltage regulator driver" ); |
250 | MODULE_LICENSE("GPL v2" ); |
251 | |