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a10e763b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f0168a9b K |
2 | /* |
3 | * Regulator driver for LP87565 PMIC | |
4 | * | |
5 | * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ | |
f0168a9b K |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/platform_device.h> | |
10 | #include <linux/regmap.h> | |
11 | ||
12 | #include <linux/mfd/lp87565.h> | |
13 | ||
14 | #define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ | |
15 | _delay, _lr, _cr) \ | |
16 | [_id] = { \ | |
17 | .desc = { \ | |
18 | .name = _name, \ | |
19 | .supply_name = _of "-in", \ | |
20 | .id = _id, \ | |
21 | .of_match = of_match_ptr(_of), \ | |
22 | .regulators_node = of_match_ptr("regulators"),\ | |
23 | .ops = &_ops, \ | |
24 | .n_voltages = _n, \ | |
25 | .type = REGULATOR_VOLTAGE, \ | |
26 | .owner = THIS_MODULE, \ | |
27 | .vsel_reg = _vr, \ | |
28 | .vsel_mask = _vm, \ | |
29 | .enable_reg = _er, \ | |
30 | .enable_mask = _em, \ | |
31 | .ramp_delay = _delay, \ | |
32 | .linear_ranges = _lr, \ | |
33 | .n_linear_ranges = ARRAY_SIZE(_lr), \ | |
d0ccbe11 AL |
34 | .curr_table = lp87565_buck_uA, \ |
35 | .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\ | |
36 | .csel_reg = (_cr), \ | |
37 | .csel_mask = LP87565_BUCK_CTRL_2_ILIM, \ | |
f0168a9b K |
38 | }, \ |
39 | .ctrl2_reg = _cr, \ | |
40 | } | |
41 | ||
42 | struct lp87565_regulator { | |
43 | struct regulator_desc desc; | |
44 | unsigned int ctrl2_reg; | |
45 | }; | |
46 | ||
47 | static const struct lp87565_regulator regulators[]; | |
48 | ||
49 | static const struct regulator_linear_range buck0_1_2_3_ranges[] = { | |
42f1ea48 | 50 | REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000), |
f0168a9b K |
51 | REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), |
52 | REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), | |
53 | }; | |
54 | ||
b7fbc592 | 55 | static const unsigned int lp87565_buck_ramp_delay[] = { |
f0168a9b K |
56 | 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 |
57 | }; | |
58 | ||
59 | /* LP87565 BUCK current limit */ | |
60 | static const unsigned int lp87565_buck_uA[] = { | |
61 | 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, | |
62 | }; | |
63 | ||
64 | static 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 | ||
2d045e94 K |
99 | /* Conservatively give a 15% margin */ |
100 | rdev->constraints->ramp_delay = | |
101 | rdev->constraints->ramp_delay * 85 / 100; | |
102 | ||
f0168a9b K |
103 | return 0; |
104 | } | |
105 | ||
d0ccbe11 | 106 | /* Operations permitted on BUCKs */ |
b7fbc592 | 107 | static const struct regulator_ops lp87565_buck_ops = { |
f0168a9b K |
108 | .is_enabled = regulator_is_enabled_regmap, |
109 | .enable = regulator_enable_regmap, | |
110 | .disable = regulator_disable_regmap, | |
111 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
112 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
113 | .list_voltage = regulator_list_voltage_linear_range, | |
114 | .map_voltage = regulator_map_voltage_linear_range, | |
115 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
116 | .set_ramp_delay = lp87565_buck_set_ramp_delay, | |
d0ccbe11 AL |
117 | .set_current_limit = regulator_set_current_limit_regmap, |
118 | .get_current_limit = regulator_get_current_limit_regmap, | |
f0168a9b K |
119 | }; |
120 | ||
121 | static const struct lp87565_regulator regulators[] = { | |
122 | LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, | |
123 | 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, | |
124 | LP87565_REG_BUCK0_CTRL_1, | |
2d045e94 | 125 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
126 | buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
127 | LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, | |
128 | 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, | |
129 | LP87565_REG_BUCK1_CTRL_1, | |
2d045e94 | 130 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
131 | buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), |
132 | LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, | |
133 | 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, | |
134 | LP87565_REG_BUCK2_CTRL_1, | |
2d045e94 | 135 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
136 | buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
137 | LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, | |
138 | 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, | |
139 | LP87565_REG_BUCK3_CTRL_1, | |
2d045e94 | 140 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
141 | buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), |
142 | LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, | |
143 | 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, | |
144 | LP87565_REG_BUCK0_CTRL_1, | |
2f51a260 K |
145 | LP87565_BUCK_CTRL_1_EN | |
146 | LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, | |
f0168a9b K |
147 | buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
148 | LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, | |
149 | 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, | |
150 | LP87565_REG_BUCK2_CTRL_1, | |
2d045e94 | 151 | LP87565_BUCK_CTRL_1_EN, 3230, |
f0168a9b K |
152 | buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
153 | }; | |
154 | ||
155 | static int lp87565_regulator_probe(struct platform_device *pdev) | |
156 | { | |
157 | struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); | |
158 | struct regulator_config config = { }; | |
159 | struct regulator_dev *rdev; | |
d1a6cbdf | 160 | int i, min_idx = LP87565_BUCK_0, max_idx = LP87565_BUCK_3; |
f0168a9b K |
161 | |
162 | platform_set_drvdata(pdev, lp87565); | |
163 | ||
164 | config.dev = &pdev->dev; | |
165 | config.dev->of_node = lp87565->dev->of_node; | |
166 | config.driver_data = lp87565; | |
167 | config.regmap = lp87565->regmap; | |
168 | ||
169 | if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) { | |
170 | min_idx = LP87565_BUCK_10; | |
171 | max_idx = LP87565_BUCK_23; | |
172 | } | |
173 | ||
174 | for (i = min_idx; i <= max_idx; i++) { | |
175 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, | |
176 | &config); | |
177 | if (IS_ERR(rdev)) { | |
178 | dev_err(lp87565->dev, "failed to register %s regulator\n", | |
179 | pdev->name); | |
180 | return PTR_ERR(rdev); | |
181 | } | |
182 | } | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static const struct platform_device_id lp87565_regulator_id_table[] = { | |
188 | { "lp87565-regulator", }, | |
189 | { "lp87565-q1-regulator", }, | |
190 | { /* sentinel */ } | |
191 | }; | |
192 | MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); | |
193 | ||
194 | static struct platform_driver lp87565_regulator_driver = { | |
195 | .driver = { | |
196 | .name = "lp87565-pmic", | |
197 | }, | |
198 | .probe = lp87565_regulator_probe, | |
199 | .id_table = lp87565_regulator_id_table, | |
200 | }; | |
201 | module_platform_driver(lp87565_regulator_driver); | |
202 | ||
203 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); | |
204 | MODULE_DESCRIPTION("LP87565 voltage regulator driver"); | |
205 | MODULE_LICENSE("GPL v2"); |