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> |
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> |
14 | #include <linux/of.h> |
15 | #include <linux/gpio/consumer.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regulator/driver.h> |
18 | #include <linux/regulator/machine.h> |
19 | #include <linux/regulator/of_regulator.h> |
20 | #include <linux/slab.h> |
21 | |
22 | #include <linux/regulator/arizona-ldo1.h> |
23 | |
24 | #include <linux/mfd/arizona/core.h> |
25 | #include <linux/mfd/arizona/pdata.h> |
26 | #include <linux/mfd/arizona/registers.h> |
27 | |
28 | #include <linux/mfd/madera/core.h> |
29 | #include <linux/mfd/madera/pdata.h> |
30 | #include <linux/mfd/madera/registers.h> |
31 | |
32 | struct arizona_ldo1 { |
33 | struct regulator_dev *regulator; |
34 | struct regmap *regmap; |
35 | |
36 | struct regulator_consumer_supply supply; |
37 | struct regulator_init_data init_data; |
38 | |
39 | struct gpio_desc *ena_gpiod; |
40 | }; |
41 | |
42 | static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, |
43 | unsigned sel) |
44 | { |
45 | struct regmap *regmap = rdev_get_regmap(rdev); |
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(map: regmap, ARIZONA_LDO1_CONTROL_2, |
55 | ARIZONA_LDO1_HI_PWR, val); |
56 | if (ret != 0) |
57 | return ret; |
58 | |
59 | if (val) |
60 | return 0; |
61 | |
62 | return regulator_set_voltage_sel_regmap(rdev, sel); |
63 | } |
64 | |
65 | static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) |
66 | { |
67 | struct regmap *regmap = rdev_get_regmap(rdev); |
68 | unsigned int val; |
69 | int ret; |
70 | |
71 | ret = regmap_read(map: regmap, ARIZONA_LDO1_CONTROL_2, val: &val); |
72 | if (ret != 0) |
73 | return ret; |
74 | |
75 | if (val & ARIZONA_LDO1_HI_PWR) |
76 | return rdev->desc->n_voltages - 1; |
77 | |
78 | return regulator_get_voltage_sel_regmap(rdev); |
79 | } |
80 | |
81 | static const struct regulator_ops arizona_ldo1_hc_ops = { |
82 | .list_voltage = regulator_list_voltage_linear_range, |
83 | .map_voltage = regulator_map_voltage_linear_range, |
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 | |
90 | static const struct linear_range arizona_ldo1_hc_ranges[] = { |
91 | REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000), |
92 | REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0), |
93 | }; |
94 | |
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 | |
101 | .vsel_reg = ARIZONA_LDO1_CONTROL_1, |
102 | .vsel_mask = ARIZONA_LDO1_VSEL_MASK, |
103 | .bypass_reg = ARIZONA_LDO1_CONTROL_1, |
104 | .bypass_mask = ARIZONA_LDO1_BYPASS, |
105 | .linear_ranges = arizona_ldo1_hc_ranges, |
106 | .n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges), |
107 | .n_voltages = 8, |
108 | .enable_time = 1500, |
109 | .ramp_delay = 24000, |
110 | |
111 | .owner = THIS_MODULE, |
112 | }; |
113 | |
114 | static const struct regulator_ops arizona_ldo1_ops = { |
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, |
130 | .uV_step = 25000, |
131 | .n_voltages = 13, |
132 | .enable_time = 500, |
133 | .ramp_delay = 24000, |
134 | |
135 | .owner = THIS_MODULE, |
136 | }; |
137 | |
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 | |
148 | static const struct regulator_init_data arizona_ldo1_default = { |
149 | .constraints = { |
150 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, |
151 | }, |
152 | .num_consumer_supplies = 1, |
153 | }; |
154 | |
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 | |
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 | |
190 | static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata, |
191 | struct regulator_config *config, |
192 | const struct regulator_desc *desc, |
193 | bool *external_dcvdd) |
194 | { |
195 | struct arizona_ldo1 *ldo1 = config->driver_data; |
196 | struct device_node *np = config->dev->of_node; |
197 | struct device_node *init_node, *dcvdd_node; |
198 | struct regulator_init_data *init_data; |
199 | |
200 | init_node = of_get_child_by_name(node: np, name: "ldo1" ); |
201 | dcvdd_node = of_parse_phandle(np, phandle_name: "DCVDD-supply" , index: 0); |
202 | |
203 | if (init_node) { |
204 | config->of_node = init_node; |
205 | |
206 | init_data = of_get_regulator_init_data(dev: config->dev, node: init_node, |
207 | desc); |
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) |
213 | *external_dcvdd = true; |
214 | |
215 | pdata->init_data = init_data; |
216 | } |
217 | } else if (dcvdd_node) { |
218 | *external_dcvdd = true; |
219 | } |
220 | |
221 | of_node_put(node: dcvdd_node); |
222 | |
223 | return 0; |
224 | } |
225 | |
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) |
231 | { |
232 | struct device *parent_dev = pdev->dev.parent; |
233 | struct regulator_config config = { }; |
234 | int ret; |
235 | |
236 | *external_dcvdd = false; |
237 | |
238 | ldo1->supply.supply = "DCVDD" ; |
239 | ldo1->init_data.consumer_supplies = &ldo1->supply; |
240 | ldo1->supply.dev_name = dev_name(dev: parent_dev); |
241 | |
242 | config.dev = parent_dev; |
243 | config.driver_data = ldo1; |
244 | config.regmap = ldo1->regmap; |
245 | |
246 | if (IS_ENABLED(CONFIG_OF)) { |
247 | if (!dev_get_platdata(dev: parent_dev)) { |
248 | ret = arizona_ldo1_of_get_pdata(pdata, |
249 | config: &config, desc, |
250 | external_dcvdd); |
251 | if (ret < 0) |
252 | return ret; |
253 | } |
254 | } |
255 | |
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(dev: parent_dev, con_id: "wlf,ldoena" , |
261 | flags: GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); |
262 | if (IS_ERR(ptr: config.ena_gpiod)) |
263 | return PTR_ERR(ptr: config.ena_gpiod); |
264 | |
265 | ldo1->ena_gpiod = config.ena_gpiod; |
266 | |
267 | if (pdata->init_data) |
268 | config.init_data = pdata->init_data; |
269 | else |
270 | config.init_data = &ldo1->init_data; |
271 | |
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) |
277 | *external_dcvdd = true; |
278 | |
279 | ldo1->regulator = devm_regulator_register(dev: &pdev->dev, regulator_desc: desc, config: &config); |
280 | |
281 | of_node_put(node: config.of_node); |
282 | |
283 | if (IS_ERR(ptr: ldo1->regulator)) { |
284 | ret = PTR_ERR(ptr: ldo1->regulator); |
285 | dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n" , |
286 | ret); |
287 | return ret; |
288 | } |
289 | |
290 | platform_set_drvdata(pdev, data: ldo1); |
291 | |
292 | return 0; |
293 | } |
294 | |
295 | static int arizona_ldo1_probe(struct platform_device *pdev) |
296 | { |
297 | struct arizona *arizona = dev_get_drvdata(dev: 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(dev: &pdev->dev, size: 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 | pdata: &arizona->pdata.ldo1, |
335 | external_dcvdd: &external_dcvdd); |
336 | if (ret == 0) |
337 | arizona->external_dcvdd = external_dcvdd; |
338 | |
339 | return ret; |
340 | } |
341 | |
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(desc: ldo1->ena_gpiod); |
348 | |
349 | return 0; |
350 | } |
351 | |
352 | static int madera_ldo1_probe(struct platform_device *pdev) |
353 | { |
354 | struct madera *madera = dev_get_drvdata(dev: pdev->dev.parent); |
355 | struct arizona_ldo1 *ldo1; |
356 | bool external_dcvdd; |
357 | int ret; |
358 | |
359 | ldo1 = devm_kzalloc(dev: &pdev->dev, size: 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, desc: &madera_ldo1, |
368 | pdata: &madera->pdata.ldo1, |
369 | external_dcvdd: &external_dcvdd); |
370 | if (ret) |
371 | return ret; |
372 | |
373 | madera->internal_dcvdd = !external_dcvdd; |
374 | |
375 | return 0; |
376 | } |
377 | |
378 | static struct platform_driver arizona_ldo1_driver = { |
379 | .probe = arizona_ldo1_probe, |
380 | .remove = arizona_ldo1_remove, |
381 | .driver = { |
382 | .name = "arizona-ldo1" , |
383 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
384 | }, |
385 | }; |
386 | |
387 | static struct platform_driver madera_ldo1_driver = { |
388 | .probe = madera_ldo1_probe, |
389 | .remove = arizona_ldo1_remove, |
390 | .driver = { |
391 | .name = "madera-ldo1" , |
392 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
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(drivers: madera_ldo1_drivers, |
411 | ARRAY_SIZE(madera_ldo1_drivers)); |
412 | } |
413 | module_exit(madera_ldo1_exit); |
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" ); |
420 | MODULE_ALIAS("platform:madera-ldo1" ); |
421 | |