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1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | // Copyright (C) 2018 ROHM Semiconductors | |
3 | // bd70528-regulator.c ROHM BD70528MWV regulator driver | |
4 | ||
5 | #include <linux/delay.h> | |
6 | #include <linux/err.h> | |
7 | #include <linux/interrupt.h> | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/mfd/rohm-bd70528.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/of.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/regmap.h> | |
14 | #include <linux/regulator/driver.h> | |
15 | #include <linux/regulator/machine.h> | |
16 | #include <linux/regulator/of_regulator.h> | |
17 | #include <linux/slab.h> | |
18 | ||
19 | #define BUCK_RAMPRATE_250MV 0 | |
20 | #define BUCK_RAMPRATE_125MV 1 | |
21 | #define BUCK_RAMP_MAX 250 | |
22 | ||
23 | static const struct regulator_linear_range bd70528_buck1_volts[] = { | |
24 | REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000), | |
25 | REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000), | |
26 | }; | |
27 | static const struct regulator_linear_range bd70528_buck2_volts[] = { | |
28 | REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000), | |
29 | REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000), | |
30 | REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000), | |
31 | }; | |
32 | static const struct regulator_linear_range bd70528_buck3_volts[] = { | |
33 | REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000), | |
34 | REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0), | |
35 | }; | |
36 | ||
37 | /* All LDOs have same voltage ranges */ | |
38 | static const struct regulator_linear_range bd70528_ldo_volts[] = { | |
39 | REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000), | |
40 | REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000), | |
41 | REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000), | |
42 | REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0), | |
43 | }; | |
44 | ||
45 | /* Also both LEDs support same voltages */ | |
46 | static const unsigned int led_volts[] = { | |
47 | 20000, 30000 | |
48 | }; | |
49 | ||
50 | static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) | |
51 | { | |
52 | if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) { | |
53 | unsigned int ramp_value = BUCK_RAMPRATE_250MV; | |
54 | ||
55 | if (ramp_delay <= 125) | |
56 | ramp_value = BUCK_RAMPRATE_125MV; | |
57 | ||
58 | return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg, | |
59 | BD70528_MASK_BUCK_RAMP, | |
60 | ramp_value << BD70528_SIFT_BUCK_RAMP); | |
61 | } | |
62 | dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n", | |
63 | rdev->desc->name, ramp_delay); | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
67 | static int bd70528_led_set_voltage_sel(struct regulator_dev *rdev, | |
68 | unsigned int sel) | |
69 | { | |
70 | int ret; | |
71 | ||
72 | ret = regulator_is_enabled_regmap(rdev); | |
73 | if (ret < 0) | |
74 | return ret; | |
75 | ||
76 | if (ret == 0) | |
77 | return regulator_set_voltage_sel_regmap(rdev, sel); | |
78 | ||
79 | dev_err(&rdev->dev, | |
80 | "LED voltage change not allowed when led is enabled\n"); | |
81 | ||
82 | return -EBUSY; | |
83 | } | |
84 | ||
85 | static const struct regulator_ops bd70528_buck_ops = { | |
86 | .enable = regulator_enable_regmap, | |
87 | .disable = regulator_disable_regmap, | |
88 | .is_enabled = regulator_is_enabled_regmap, | |
89 | .list_voltage = regulator_list_voltage_linear_range, | |
90 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
91 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
92 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
93 | .set_ramp_delay = bd70528_set_ramp_delay, | |
94 | }; | |
95 | ||
96 | static const struct regulator_ops bd70528_ldo_ops = { | |
97 | .enable = regulator_enable_regmap, | |
98 | .disable = regulator_disable_regmap, | |
99 | .is_enabled = regulator_is_enabled_regmap, | |
100 | .list_voltage = regulator_list_voltage_linear_range, | |
101 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
102 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
103 | .set_voltage_time_sel = regulator_set_voltage_time_sel, | |
104 | }; | |
105 | ||
106 | static const struct regulator_ops bd70528_led_ops = { | |
107 | .enable = regulator_enable_regmap, | |
108 | .disable = regulator_disable_regmap, | |
109 | .is_enabled = regulator_is_enabled_regmap, | |
110 | .list_voltage = regulator_list_voltage_table, | |
111 | .set_voltage_sel = bd70528_led_set_voltage_sel, | |
112 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
113 | }; | |
114 | ||
115 | static const struct regulator_desc bd70528_desc[] = { | |
116 | { | |
117 | .name = "buck1", | |
118 | .of_match = of_match_ptr("BUCK1"), | |
119 | .regulators_node = of_match_ptr("regulators"), | |
120 | .id = BD70528_BUCK1, | |
121 | .ops = &bd70528_buck_ops, | |
122 | .type = REGULATOR_VOLTAGE, | |
123 | .linear_ranges = bd70528_buck1_volts, | |
124 | .n_linear_ranges = ARRAY_SIZE(bd70528_buck1_volts), | |
125 | .n_voltages = BD70528_BUCK_VOLTS, | |
126 | .enable_reg = BD70528_REG_BUCK1_EN, | |
127 | .enable_mask = BD70528_MASK_RUN_EN, | |
128 | .vsel_reg = BD70528_REG_BUCK1_VOLT, | |
129 | .vsel_mask = BD70528_MASK_BUCK_VOLT, | |
130 | .owner = THIS_MODULE, | |
131 | }, | |
132 | { | |
133 | .name = "buck2", | |
134 | .of_match = of_match_ptr("BUCK2"), | |
135 | .regulators_node = of_match_ptr("regulators"), | |
136 | .id = BD70528_BUCK2, | |
137 | .ops = &bd70528_buck_ops, | |
138 | .type = REGULATOR_VOLTAGE, | |
139 | .linear_ranges = bd70528_buck2_volts, | |
140 | .n_linear_ranges = ARRAY_SIZE(bd70528_buck2_volts), | |
141 | .n_voltages = BD70528_BUCK_VOLTS, | |
142 | .enable_reg = BD70528_REG_BUCK2_EN, | |
143 | .enable_mask = BD70528_MASK_RUN_EN, | |
144 | .vsel_reg = BD70528_REG_BUCK2_VOLT, | |
145 | .vsel_mask = BD70528_MASK_BUCK_VOLT, | |
146 | .owner = THIS_MODULE, | |
147 | }, | |
148 | { | |
149 | .name = "buck3", | |
150 | .of_match = of_match_ptr("BUCK3"), | |
151 | .regulators_node = of_match_ptr("regulators"), | |
152 | .id = BD70528_BUCK3, | |
153 | .ops = &bd70528_buck_ops, | |
154 | .type = REGULATOR_VOLTAGE, | |
155 | .linear_ranges = bd70528_buck3_volts, | |
156 | .n_linear_ranges = ARRAY_SIZE(bd70528_buck3_volts), | |
157 | .n_voltages = BD70528_BUCK_VOLTS, | |
158 | .enable_reg = BD70528_REG_BUCK3_EN, | |
159 | .enable_mask = BD70528_MASK_RUN_EN, | |
160 | .vsel_reg = BD70528_REG_BUCK3_VOLT, | |
161 | .vsel_mask = BD70528_MASK_BUCK_VOLT, | |
162 | .owner = THIS_MODULE, | |
163 | }, | |
164 | { | |
165 | .name = "ldo1", | |
166 | .of_match = of_match_ptr("LDO1"), | |
167 | .regulators_node = of_match_ptr("regulators"), | |
168 | .id = BD70528_LDO1, | |
169 | .ops = &bd70528_ldo_ops, | |
170 | .type = REGULATOR_VOLTAGE, | |
171 | .linear_ranges = bd70528_ldo_volts, | |
172 | .n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts), | |
173 | .n_voltages = BD70528_LDO_VOLTS, | |
174 | .enable_reg = BD70528_REG_LDO1_EN, | |
175 | .enable_mask = BD70528_MASK_RUN_EN, | |
176 | .vsel_reg = BD70528_REG_LDO1_VOLT, | |
177 | .vsel_mask = BD70528_MASK_LDO_VOLT, | |
178 | .owner = THIS_MODULE, | |
179 | }, | |
180 | { | |
181 | .name = "ldo2", | |
182 | .of_match = of_match_ptr("LDO2"), | |
183 | .regulators_node = of_match_ptr("regulators"), | |
184 | .id = BD70528_LDO2, | |
185 | .ops = &bd70528_ldo_ops, | |
186 | .type = REGULATOR_VOLTAGE, | |
187 | .linear_ranges = bd70528_ldo_volts, | |
188 | .n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts), | |
189 | .n_voltages = BD70528_LDO_VOLTS, | |
190 | .enable_reg = BD70528_REG_LDO2_EN, | |
191 | .enable_mask = BD70528_MASK_RUN_EN, | |
192 | .vsel_reg = BD70528_REG_LDO2_VOLT, | |
193 | .vsel_mask = BD70528_MASK_LDO_VOLT, | |
194 | .owner = THIS_MODULE, | |
195 | }, | |
196 | { | |
197 | .name = "ldo3", | |
198 | .of_match = of_match_ptr("LDO3"), | |
199 | .regulators_node = of_match_ptr("regulators"), | |
200 | .id = BD70528_LDO3, | |
201 | .ops = &bd70528_ldo_ops, | |
202 | .type = REGULATOR_VOLTAGE, | |
203 | .linear_ranges = bd70528_ldo_volts, | |
204 | .n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts), | |
205 | .n_voltages = BD70528_LDO_VOLTS, | |
206 | .enable_reg = BD70528_REG_LDO3_EN, | |
207 | .enable_mask = BD70528_MASK_RUN_EN, | |
208 | .vsel_reg = BD70528_REG_LDO3_VOLT, | |
209 | .vsel_mask = BD70528_MASK_LDO_VOLT, | |
210 | .owner = THIS_MODULE, | |
211 | }, | |
212 | { | |
213 | .name = "ldo_led1", | |
214 | .of_match = of_match_ptr("LDO_LED1"), | |
215 | .regulators_node = of_match_ptr("regulators"), | |
216 | .id = BD70528_LED1, | |
217 | .ops = &bd70528_led_ops, | |
218 | .type = REGULATOR_VOLTAGE, | |
219 | .volt_table = &led_volts[0], | |
220 | .n_voltages = ARRAY_SIZE(led_volts), | |
221 | .enable_reg = BD70528_REG_LED_EN, | |
222 | .enable_mask = BD70528_MASK_LED1_EN, | |
223 | .vsel_reg = BD70528_REG_LED_VOLT, | |
224 | .vsel_mask = BD70528_MASK_LED1_VOLT, | |
225 | .owner = THIS_MODULE, | |
226 | }, | |
227 | { | |
228 | .name = "ldo_led2", | |
229 | .of_match = of_match_ptr("LDO_LED2"), | |
230 | .regulators_node = of_match_ptr("regulators"), | |
231 | .id = BD70528_LED2, | |
232 | .ops = &bd70528_led_ops, | |
233 | .type = REGULATOR_VOLTAGE, | |
234 | .volt_table = &led_volts[0], | |
235 | .n_voltages = ARRAY_SIZE(led_volts), | |
236 | .enable_reg = BD70528_REG_LED_EN, | |
237 | .enable_mask = BD70528_MASK_LED2_EN, | |
238 | .vsel_reg = BD70528_REG_LED_VOLT, | |
239 | .vsel_mask = BD70528_MASK_LED2_VOLT, | |
240 | .owner = THIS_MODULE, | |
241 | }, | |
242 | ||
243 | }; | |
244 | ||
245 | static int bd70528_probe(struct platform_device *pdev) | |
246 | { | |
247 | struct rohm_regmap_dev *bd70528; | |
248 | int i; | |
249 | struct regulator_config config = { | |
250 | .dev = pdev->dev.parent, | |
251 | }; | |
252 | ||
253 | bd70528 = dev_get_drvdata(pdev->dev.parent); | |
254 | if (!bd70528) { | |
255 | dev_err(&pdev->dev, "No MFD driver data\n"); | |
256 | return -EINVAL; | |
257 | } | |
258 | ||
259 | config.regmap = bd70528->regmap; | |
260 | ||
261 | for (i = 0; i < ARRAY_SIZE(bd70528_desc); i++) { | |
262 | struct regulator_dev *rdev; | |
263 | ||
264 | rdev = devm_regulator_register(&pdev->dev, &bd70528_desc[i], | |
265 | &config); | |
266 | if (IS_ERR(rdev)) { | |
267 | dev_err(&pdev->dev, | |
268 | "failed to register %s regulator\n", | |
269 | bd70528_desc[i].name); | |
270 | return PTR_ERR(rdev); | |
271 | } | |
272 | } | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static struct platform_driver bd70528_regulator = { | |
277 | .driver = { | |
278 | .name = "bd70528-pmic" | |
279 | }, | |
280 | .probe = bd70528_probe, | |
281 | }; | |
282 | ||
283 | module_platform_driver(bd70528_regulator); | |
284 | ||
285 | MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); | |
286 | MODULE_DESCRIPTION("BD70528 voltage regulator driver"); | |
287 | MODULE_LICENSE("GPL"); | |
288 | MODULE_ALIAS("platform:bd70528-pmic"); |