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/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, \
15 _er, _em, _ev, _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 .enable_val = _ev, \
32 .ramp_delay = _delay, \
33 .linear_ranges = _lr, \
34 .n_linear_ranges = ARRAY_SIZE(_lr), \
35 .curr_table = lp87565_buck_uA, \
36 .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\
37 .csel_reg = (_cr), \
38 .csel_mask = LP87565_BUCK_CTRL_2_ILIM, \
39 }, \
40 .ctrl2_reg = _cr, \
41 }
42
43 struct lp87565_regulator {
44 struct regulator_desc desc;
45 unsigned int ctrl2_reg;
46 };
47
48 static const struct lp87565_regulator regulators[];
49
50 static const struct linear_range buck0_1_2_3_ranges[] = {
51 REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
52 REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
53 REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
54 };
55
56 static const unsigned int lp87565_buck_ramp_delay[] = {
57 30000, 15000, 10000, 7500, 3800, 1900, 940, 470
58 };
59
60 /* LP87565 BUCK current limit */
61 static const unsigned int lp87565_buck_uA[] = {
62 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
63 };
64
lp87565_buck_set_ramp_delay(struct regulator_dev * rdev,int ramp_delay)65 static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
66 int ramp_delay)
67 {
68 int id = rdev_get_id(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(rdev->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(&rdev->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 /* Conservatively give a 15% margin */
100 rdev->constraints->ramp_delay =
101 rdev->constraints->ramp_delay * 85 / 100;
102
103 return 0;
104 }
105
106 /* Operations permitted on BUCKs */
107 static const struct regulator_ops lp87565_buck_ops = {
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,
117 .set_current_limit = regulator_set_current_limit_regmap,
118 .get_current_limit = regulator_get_current_limit_regmap,
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,
125 LP87565_BUCK_CTRL_1_EN |
126 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
127 LP87565_BUCK_CTRL_1_EN, 3230,
128 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
129 LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
130 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
131 LP87565_REG_BUCK1_CTRL_1,
132 LP87565_BUCK_CTRL_1_EN |
133 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
134 LP87565_BUCK_CTRL_1_EN, 3230,
135 buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
136 LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
137 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
138 LP87565_REG_BUCK2_CTRL_1,
139 LP87565_BUCK_CTRL_1_EN |
140 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
141 LP87565_BUCK_CTRL_1_EN, 3230,
142 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
143 LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
144 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
145 LP87565_REG_BUCK3_CTRL_1,
146 LP87565_BUCK_CTRL_1_EN |
147 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
148 LP87565_BUCK_CTRL_1_EN, 3230,
149 buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
150 LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
151 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
152 LP87565_REG_BUCK0_CTRL_1,
153 LP87565_BUCK_CTRL_1_EN |
154 LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
155 LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
156 LP87565_BUCK_CTRL_1_EN |
157 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
158 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
159 LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
160 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
161 LP87565_REG_BUCK2_CTRL_1,
162 LP87565_BUCK_CTRL_1_EN |
163 LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
164 LP87565_BUCK_CTRL_1_EN, 3230,
165 buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
166 LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210",
167 lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT,
168 LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1,
169 LP87565_BUCK_CTRL_1_EN |
170 LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
171 LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
172 LP87565_BUCK_CTRL_1_EN |
173 LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
174 buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
175 };
176
lp87565_regulator_probe(struct platform_device * pdev)177 static int lp87565_regulator_probe(struct platform_device *pdev)
178 {
179 struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
180 struct regulator_config config = { };
181 struct regulator_dev *rdev;
182 int i, min_idx, max_idx;
183
184 platform_set_drvdata(pdev, lp87565);
185
186 config.dev = &pdev->dev;
187 config.dev->of_node = lp87565->dev->of_node;
188 config.driver_data = lp87565;
189 config.regmap = lp87565->regmap;
190
191 switch (lp87565->dev_type) {
192 case LP87565_DEVICE_TYPE_LP87565_Q1:
193 min_idx = LP87565_BUCK_10;
194 max_idx = LP87565_BUCK_23;
195 break;
196 case LP87565_DEVICE_TYPE_LP87561_Q1:
197 min_idx = LP87565_BUCK_3210;
198 max_idx = LP87565_BUCK_3210;
199 break;
200 default:
201 min_idx = LP87565_BUCK_0;
202 max_idx = LP87565_BUCK_3;
203 break;
204 }
205
206 for (i = min_idx; i <= max_idx; i++) {
207 rdev = devm_regulator_register(&pdev->dev, ®ulators[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
219 static const struct platform_device_id lp87565_regulator_id_table[] = {
220 { "lp87565-regulator", },
221 { "lp87565-q1-regulator", },
222 { /* sentinel */ }
223 };
224 MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
225
226 static 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 };
233 module_platform_driver(lp87565_regulator_driver);
234
235 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
236 MODULE_DESCRIPTION("LP87565 voltage regulator driver");
237 MODULE_LICENSE("GPL v2");
238