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dfc0c82b AL |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // arizona-ldo1.c -- LDO1 supply for Arizona devices | |
4 | // | |
5 | // Copyright 2012 Wolfson Microelectronics PLC. | |
6 | // | |
7 | // Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
1910efa1 MB |
8 | |
9 | #include <linux/module.h> | |
10 | #include <linux/moduleparam.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/bitops.h> | |
13 | #include <linux/err.h> | |
7b22b9a5 | 14 | #include <linux/of.h> |
e1739e86 | 15 | #include <linux/gpio/consumer.h> |
1910efa1 MB |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regulator/driver.h> | |
18 | #include <linux/regulator/machine.h> | |
2cce4be9 | 19 | #include <linux/regulator/of_regulator.h> |
1910efa1 MB |
20 | #include <linux/slab.h> |
21 | ||
aaa84e6a RF |
22 | #include <linux/regulator/arizona-ldo1.h> |
23 | ||
1910efa1 MB |
24 | #include <linux/mfd/arizona/core.h> |
25 | #include <linux/mfd/arizona/pdata.h> | |
26 | #include <linux/mfd/arizona/registers.h> | |
27 | ||
1f5f11e7 RF |
28 | #include <linux/mfd/madera/core.h> |
29 | #include <linux/mfd/madera/pdata.h> | |
30 | #include <linux/mfd/madera/registers.h> | |
31 | ||
1910efa1 MB |
32 | struct arizona_ldo1 { |
33 | struct regulator_dev *regulator; | |
80a55f41 | 34 | struct regmap *regmap; |
1910efa1 MB |
35 | |
36 | struct regulator_consumer_supply supply; | |
37 | struct regulator_init_data init_data; | |
a9191579 CK |
38 | |
39 | struct gpio_desc *ena_gpiod; | |
1910efa1 MB |
40 | }; |
41 | ||
73ee2946 MB |
42 | static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, |
43 | unsigned sel) | |
44 | { | |
5db2efbe | 45 | struct regmap *regmap = rdev_get_regmap(rdev); |
73ee2946 MB |
46 | unsigned int val; |
47 | int ret; | |
48 | ||
49 | if (sel == rdev->desc->n_voltages - 1) | |
50 | val = ARIZONA_LDO1_HI_PWR; | |
51 | else | |
52 | val = 0; | |
53 | ||
54 | ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, | |
55 | ARIZONA_LDO1_HI_PWR, val); | |
56 | if (ret != 0) | |
57 | return ret; | |
58 | ||
73ee2946 MB |
59 | if (val) |
60 | return 0; | |
61 | ||
5db2efbe | 62 | return regulator_set_voltage_sel_regmap(rdev, sel); |
73ee2946 MB |
63 | } |
64 | ||
65 | static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) | |
66 | { | |
5db2efbe | 67 | struct regmap *regmap = rdev_get_regmap(rdev); |
73ee2946 MB |
68 | unsigned int val; |
69 | int ret; | |
70 | ||
71 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); | |
72 | if (ret != 0) | |
73 | return ret; | |
74 | ||
75 | if (val & ARIZONA_LDO1_HI_PWR) | |
76 | return rdev->desc->n_voltages - 1; | |
77 | ||
5db2efbe | 78 | return regulator_get_voltage_sel_regmap(rdev); |
73ee2946 MB |
79 | } |
80 | ||
03d06107 | 81 | static const struct regulator_ops arizona_ldo1_hc_ops = { |
37b9ef9c AL |
82 | .list_voltage = regulator_list_voltage_linear_range, |
83 | .map_voltage = regulator_map_voltage_linear_range, | |
73ee2946 MB |
84 | .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel, |
85 | .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, | |
86 | .get_bypass = regulator_get_bypass_regmap, | |
87 | .set_bypass = regulator_set_bypass_regmap, | |
88 | }; | |
89 | ||
60ab7f41 | 90 | static const struct linear_range arizona_ldo1_hc_ranges[] = { |
37b9ef9c AL |
91 | REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000), |
92 | REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0), | |
93 | }; | |
94 | ||
73ee2946 MB |
95 | static const struct regulator_desc arizona_ldo1_hc = { |
96 | .name = "LDO1", | |
97 | .supply_name = "LDOVDD", | |
98 | .type = REGULATOR_VOLTAGE, | |
99 | .ops = &arizona_ldo1_hc_ops, | |
100 | ||
5db2efbe AL |
101 | .vsel_reg = ARIZONA_LDO1_CONTROL_1, |
102 | .vsel_mask = ARIZONA_LDO1_VSEL_MASK, | |
73ee2946 MB |
103 | .bypass_reg = ARIZONA_LDO1_CONTROL_1, |
104 | .bypass_mask = ARIZONA_LDO1_BYPASS, | |
37b9ef9c AL |
105 | .linear_ranges = arizona_ldo1_hc_ranges, |
106 | .n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges), | |
73ee2946 | 107 | .n_voltages = 8, |
ce1bcb7e | 108 | .enable_time = 1500, |
88f0e3a5 | 109 | .ramp_delay = 24000, |
73ee2946 MB |
110 | |
111 | .owner = THIS_MODULE, | |
112 | }; | |
113 | ||
03d06107 | 114 | static const struct regulator_ops arizona_ldo1_ops = { |
1910efa1 MB |
115 | .list_voltage = regulator_list_voltage_linear, |
116 | .map_voltage = regulator_map_voltage_linear, | |
117 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
118 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
119 | }; | |
120 | ||
121 | static const struct regulator_desc arizona_ldo1 = { | |
122 | .name = "LDO1", | |
123 | .supply_name = "LDOVDD", | |
124 | .type = REGULATOR_VOLTAGE, | |
125 | .ops = &arizona_ldo1_ops, | |
126 | ||
127 | .vsel_reg = ARIZONA_LDO1_CONTROL_1, | |
128 | .vsel_mask = ARIZONA_LDO1_VSEL_MASK, | |
129 | .min_uV = 900000, | |
a35ff286 CK |
130 | .uV_step = 25000, |
131 | .n_voltages = 13, | |
86a14501 | 132 | .enable_time = 500, |
88f0e3a5 | 133 | .ramp_delay = 24000, |
1910efa1 MB |
134 | |
135 | .owner = THIS_MODULE, | |
136 | }; | |
137 | ||
55a18aef MB |
138 | static const struct regulator_init_data arizona_ldo1_dvfs = { |
139 | .constraints = { | |
140 | .min_uV = 1200000, | |
141 | .max_uV = 1800000, | |
142 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
143 | REGULATOR_CHANGE_VOLTAGE, | |
144 | }, | |
145 | .num_consumer_supplies = 1, | |
146 | }; | |
147 | ||
1910efa1 | 148 | static const struct regulator_init_data arizona_ldo1_default = { |
a9905b1d MB |
149 | .constraints = { |
150 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
151 | }, | |
1910efa1 MB |
152 | .num_consumer_supplies = 1, |
153 | }; | |
154 | ||
9a6c2feb CK |
155 | static const struct regulator_init_data arizona_ldo1_wm5110 = { |
156 | .constraints = { | |
157 | .min_uV = 1175000, | |
158 | .max_uV = 1200000, | |
159 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
160 | REGULATOR_CHANGE_VOLTAGE, | |
161 | }, | |
162 | .num_consumer_supplies = 1, | |
163 | }; | |
164 | ||
1f5f11e7 RF |
165 | static const struct regulator_desc madera_ldo1 = { |
166 | .name = "LDO1", | |
167 | .supply_name = "LDOVDD", | |
168 | .type = REGULATOR_VOLTAGE, | |
169 | .ops = &arizona_ldo1_ops, | |
170 | ||
171 | .vsel_reg = MADERA_LDO1_CONTROL_1, | |
172 | .vsel_mask = MADERA_LDO1_VSEL_MASK, | |
173 | .min_uV = 900000, | |
174 | .uV_step = 25000, | |
175 | .n_voltages = 13, | |
176 | .enable_time = 3000, | |
177 | ||
178 | .owner = THIS_MODULE, | |
179 | }; | |
180 | ||
181 | static const struct regulator_init_data madera_ldo1_default = { | |
182 | .constraints = { | |
183 | .min_uV = 1200000, | |
184 | .max_uV = 1200000, | |
185 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
186 | }, | |
187 | .num_consumer_supplies = 1, | |
188 | }; | |
189 | ||
aaa84e6a | 190 | static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata, |
072e78b1 | 191 | struct regulator_config *config, |
aaa84e6a RF |
192 | const struct regulator_desc *desc, |
193 | bool *external_dcvdd) | |
4a8c475f | 194 | { |
2cce4be9 | 195 | struct arizona_ldo1 *ldo1 = config->driver_data; |
aaa84e6a | 196 | struct device_node *np = config->dev->of_node; |
2cce4be9 CK |
197 | struct device_node *init_node, *dcvdd_node; |
198 | struct regulator_init_data *init_data; | |
4a8c475f | 199 | |
ce938001 CK |
200 | init_node = of_get_child_by_name(np, "ldo1"); |
201 | dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); | |
2cce4be9 CK |
202 | |
203 | if (init_node) { | |
204 | config->of_node = init_node; | |
205 | ||
aaa84e6a RF |
206 | init_data = of_get_regulator_init_data(config->dev, init_node, |
207 | desc); | |
2cce4be9 CK |
208 | if (init_data) { |
209 | init_data->consumer_supplies = &ldo1->supply; | |
210 | init_data->num_consumer_supplies = 1; | |
211 | ||
212 | if (dcvdd_node && dcvdd_node != init_node) | |
aaa84e6a | 213 | *external_dcvdd = true; |
2cce4be9 | 214 | |
aaa84e6a | 215 | pdata->init_data = init_data; |
2cce4be9 CK |
216 | } |
217 | } else if (dcvdd_node) { | |
aaa84e6a | 218 | *external_dcvdd = true; |
2cce4be9 CK |
219 | } |
220 | ||
221 | of_node_put(dcvdd_node); | |
222 | ||
4a8c475f CK |
223 | return 0; |
224 | } | |
225 | ||
af367afa RF |
226 | static int arizona_ldo1_common_init(struct platform_device *pdev, |
227 | struct arizona_ldo1 *ldo1, | |
228 | const struct regulator_desc *desc, | |
229 | struct arizona_ldo1_pdata *pdata, | |
230 | bool *external_dcvdd) | |
1910efa1 | 231 | { |
af367afa | 232 | struct device *parent_dev = pdev->dev.parent; |
1910efa1 | 233 | struct regulator_config config = { }; |
1910efa1 MB |
234 | int ret; |
235 | ||
af367afa | 236 | *external_dcvdd = false; |
55a18aef | 237 | |
1910efa1 | 238 | ldo1->supply.supply = "DCVDD"; |
af367afa RF |
239 | ldo1->init_data.consumer_supplies = &ldo1->supply; |
240 | ldo1->supply.dev_name = dev_name(parent_dev); | |
1910efa1 | 241 | |
af367afa | 242 | config.dev = parent_dev; |
1910efa1 | 243 | config.driver_data = ldo1; |
af367afa | 244 | config.regmap = ldo1->regmap; |
4a8c475f CK |
245 | |
246 | if (IS_ENABLED(CONFIG_OF)) { | |
af367afa RF |
247 | if (!dev_get_platdata(parent_dev)) { |
248 | ret = arizona_ldo1_of_get_pdata(pdata, | |
aaa84e6a | 249 | &config, desc, |
af367afa | 250 | external_dcvdd); |
4a8c475f CK |
251 | if (ret < 0) |
252 | return ret; | |
253 | } | |
254 | } | |
255 | ||
a9191579 CK |
256 | /* We assume that high output = regulator off |
257 | * Don't use devm, since we need to get against the parent device | |
258 | * so clean up would happen at the wrong time | |
259 | */ | |
260 | config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena", | |
63239e4b | 261 | GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); |
e1739e86 LW |
262 | if (IS_ERR(config.ena_gpiod)) |
263 | return PTR_ERR(config.ena_gpiod); | |
1910efa1 | 264 | |
a9191579 CK |
265 | ldo1->ena_gpiod = config.ena_gpiod; |
266 | ||
af367afa RF |
267 | if (pdata->init_data) |
268 | config.init_data = pdata->init_data; | |
1910efa1 MB |
269 | else |
270 | config.init_data = &ldo1->init_data; | |
271 | ||
4a8c475f CK |
272 | /* |
273 | * LDO1 can only be used to supply DCVDD so if it has no | |
274 | * consumers then DCVDD is supplied externally. | |
275 | */ | |
276 | if (config.init_data->num_consumer_supplies == 0) | |
af367afa | 277 | *external_dcvdd = true; |
4a8c475f | 278 | |
14ffa888 | 279 | ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); |
ec454d70 CK |
280 | |
281 | of_node_put(config.of_node); | |
282 | ||
1910efa1 MB |
283 | if (IS_ERR(ldo1->regulator)) { |
284 | ret = PTR_ERR(ldo1->regulator); | |
af367afa | 285 | dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n", |
1910efa1 MB |
286 | ret); |
287 | return ret; | |
288 | } | |
289 | ||
290 | platform_set_drvdata(pdev, ldo1); | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
af367afa RF |
295 | static int arizona_ldo1_probe(struct platform_device *pdev) |
296 | { | |
297 | struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); | |
298 | struct arizona_ldo1 *ldo1; | |
299 | const struct regulator_desc *desc; | |
300 | bool external_dcvdd; | |
301 | int ret; | |
302 | ||
303 | ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); | |
304 | if (!ldo1) | |
305 | return -ENOMEM; | |
306 | ||
307 | ldo1->regmap = arizona->regmap; | |
308 | ||
309 | /* | |
310 | * Since the chip usually supplies itself we provide some | |
311 | * default init_data for it. This will be overridden with | |
312 | * platform data if provided. | |
313 | */ | |
314 | switch (arizona->type) { | |
315 | case WM5102: | |
316 | case WM8997: | |
317 | case WM8998: | |
318 | case WM1814: | |
319 | desc = &arizona_ldo1_hc; | |
320 | ldo1->init_data = arizona_ldo1_dvfs; | |
321 | break; | |
322 | case WM5110: | |
323 | case WM8280: | |
324 | desc = &arizona_ldo1; | |
325 | ldo1->init_data = arizona_ldo1_wm5110; | |
326 | break; | |
327 | default: | |
328 | desc = &arizona_ldo1; | |
329 | ldo1->init_data = arizona_ldo1_default; | |
330 | break; | |
331 | } | |
332 | ||
333 | ret = arizona_ldo1_common_init(pdev, ldo1, desc, | |
334 | &arizona->pdata.ldo1, | |
335 | &external_dcvdd); | |
336 | if (ret == 0) | |
337 | arizona->external_dcvdd = external_dcvdd; | |
338 | ||
339 | return ret; | |
340 | } | |
341 | ||
a9191579 CK |
342 | static int arizona_ldo1_remove(struct platform_device *pdev) |
343 | { | |
344 | struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev); | |
345 | ||
346 | if (ldo1->ena_gpiod) | |
347 | gpiod_put(ldo1->ena_gpiod); | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
1f5f11e7 RF |
352 | static int madera_ldo1_probe(struct platform_device *pdev) |
353 | { | |
354 | struct madera *madera = dev_get_drvdata(pdev->dev.parent); | |
355 | struct arizona_ldo1 *ldo1; | |
356 | bool external_dcvdd; | |
357 | int ret; | |
358 | ||
359 | ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); | |
360 | if (!ldo1) | |
361 | return -ENOMEM; | |
362 | ||
363 | ldo1->regmap = madera->regmap; | |
364 | ||
365 | ldo1->init_data = madera_ldo1_default; | |
366 | ||
367 | ret = arizona_ldo1_common_init(pdev, ldo1, &madera_ldo1, | |
368 | &madera->pdata.ldo1, | |
369 | &external_dcvdd); | |
370 | if (ret) | |
371 | return ret; | |
372 | ||
373 | madera->internal_dcvdd = !external_dcvdd; | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
1910efa1 MB |
378 | static struct platform_driver arizona_ldo1_driver = { |
379 | .probe = arizona_ldo1_probe, | |
a9191579 | 380 | .remove = arizona_ldo1_remove, |
1910efa1 MB |
381 | .driver = { |
382 | .name = "arizona-ldo1", | |
557de8d8 | 383 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
1910efa1 MB |
384 | }, |
385 | }; | |
386 | ||
1f5f11e7 RF |
387 | static struct platform_driver madera_ldo1_driver = { |
388 | .probe = madera_ldo1_probe, | |
389 | .remove = arizona_ldo1_remove, | |
390 | .driver = { | |
391 | .name = "madera-ldo1", | |
557de8d8 | 392 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
1f5f11e7 RF |
393 | }, |
394 | }; | |
395 | ||
396 | static struct platform_driver * const madera_ldo1_drivers[] = { | |
397 | &arizona_ldo1_driver, | |
398 | &madera_ldo1_driver, | |
399 | }; | |
400 | ||
401 | static int __init arizona_ldo1_init(void) | |
402 | { | |
403 | return platform_register_drivers(madera_ldo1_drivers, | |
404 | ARRAY_SIZE(madera_ldo1_drivers)); | |
405 | } | |
406 | module_init(arizona_ldo1_init); | |
407 | ||
408 | static void __exit madera_ldo1_exit(void) | |
409 | { | |
410 | platform_unregister_drivers(madera_ldo1_drivers, | |
411 | ARRAY_SIZE(madera_ldo1_drivers)); | |
412 | } | |
413 | module_exit(madera_ldo1_exit); | |
1910efa1 MB |
414 | |
415 | /* Module information */ | |
416 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
417 | MODULE_DESCRIPTION("Arizona LDO1 driver"); | |
418 | MODULE_LICENSE("GPL"); | |
419 | MODULE_ALIAS("platform:arizona-ldo1"); | |
1f5f11e7 | 420 | MODULE_ALIAS("platform:madera-ldo1"); |