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driver/base/node: remove unnecessary kfree of node struct from unregister_one_node
[linux/fpc-iii.git] / drivers / regulator / bcm590xx-regulator.c
blob58ece59367ae4884511ff6f085362afc7905d811
1 /*
2 * Broadcom BCM590xx regulator driver
3 *
4 * Copyright 2014 Linaro Limited
5 * Author: Matt Porter <mporter@linaro.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13 #include <linux/err.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/mfd/bcm590xx.h>
17 #include <linux/module.h>
18 #include <linux/of.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/regulator/of_regulator.h>
23 #include <linux/slab.h>
24
25 /* I2C slave 0 registers */
26 #define BCM590XX_RFLDOPMCTRL1 0x60
27 #define BCM590XX_IOSR1PMCTRL1 0x7a
28 #define BCM590XX_IOSR2PMCTRL1 0x7c
29 #define BCM590XX_CSRPMCTRL1 0x7e
30 #define BCM590XX_SDSR1PMCTRL1 0x82
31 #define BCM590XX_SDSR2PMCTRL1 0x86
32 #define BCM590XX_MSRPMCTRL1 0x8a
33 #define BCM590XX_VSRPMCTRL1 0x8e
34 #define BCM590XX_RFLDOCTRL 0x96
35 #define BCM590XX_CSRVOUT1 0xc0
36
37 /* I2C slave 1 registers */
38 #define BCM590XX_GPLDO5PMCTRL1 0x16
39 #define BCM590XX_GPLDO6PMCTRL1 0x18
40 #define BCM590XX_GPLDO1CTRL 0x1a
41 #define BCM590XX_GPLDO2CTRL 0x1b
42 #define BCM590XX_GPLDO3CTRL 0x1c
43 #define BCM590XX_GPLDO4CTRL 0x1d
44 #define BCM590XX_GPLDO5CTRL 0x1e
45 #define BCM590XX_GPLDO6CTRL 0x1f
46 #define BCM590XX_OTG_CTRL 0x40
47 #define BCM590XX_GPLDO1PMCTRL1 0x57
48 #define BCM590XX_GPLDO2PMCTRL1 0x59
49 #define BCM590XX_GPLDO3PMCTRL1 0x5b
50 #define BCM590XX_GPLDO4PMCTRL1 0x5d
51
52 #define BCM590XX_REG_ENABLE BIT(7)
53 #define BCM590XX_VBUS_ENABLE BIT(2)
54 #define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3)
55 #define BCM590XX_SR_VSEL_MASK GENMASK(5, 0)
56
57 /*
58 * RFLDO to VSR regulators are
59 * accessed via I2C slave 0
60 */
61
62 /* LDO regulator IDs */
63 #define BCM590XX_REG_RFLDO 0
64 #define BCM590XX_REG_CAMLDO1 1
65 #define BCM590XX_REG_CAMLDO2 2
66 #define BCM590XX_REG_SIMLDO1 3
67 #define BCM590XX_REG_SIMLDO2 4
68 #define BCM590XX_REG_SDLDO 5
69 #define BCM590XX_REG_SDXLDO 6
70 #define BCM590XX_REG_MMCLDO1 7
71 #define BCM590XX_REG_MMCLDO2 8
72 #define BCM590XX_REG_AUDLDO 9
73 #define BCM590XX_REG_MICLDO 10
74 #define BCM590XX_REG_USBLDO 11
75 #define BCM590XX_REG_VIBLDO 12
76
77 /* DCDC regulator IDs */
78 #define BCM590XX_REG_CSR 13
79 #define BCM590XX_REG_IOSR1 14
80 #define BCM590XX_REG_IOSR2 15
81 #define BCM590XX_REG_MSR 16
82 #define BCM590XX_REG_SDSR1 17
83 #define BCM590XX_REG_SDSR2 18
84 #define BCM590XX_REG_VSR 19
85
86 /*
87 * GPLDO1 to VBUS regulators are
88 * accessed via I2C slave 1
89 */
90
91 #define BCM590XX_REG_GPLDO1 20
92 #define BCM590XX_REG_GPLDO2 21
93 #define BCM590XX_REG_GPLDO3 22
94 #define BCM590XX_REG_GPLDO4 23
95 #define BCM590XX_REG_GPLDO5 24
96 #define BCM590XX_REG_GPLDO6 25
97 #define BCM590XX_REG_VBUS 26
98
99 #define BCM590XX_NUM_REGS 27
100
101 #define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR)
102 #define BCM590XX_REG_IS_GPLDO(n) \
103 ((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))
104 #define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS)
105
106 struct bcm590xx_board {
107 struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
108 };
109
110 /* LDO group A: supported voltages in microvolts */
111 static const unsigned int ldo_a_table[] = {
112 1200000, 1800000, 2500000, 2700000, 2800000,
113 2900000, 3000000, 3300000,
114 };
115
116 /* LDO group C: supported voltages in microvolts */
117 static const unsigned int ldo_c_table[] = {
118 3100000, 1800000, 2500000, 2700000, 2800000,
119 2900000, 3000000, 3300000,
120 };
121
122 static const unsigned int ldo_vbus[] = {
123 5000000,
124 };
125
126 /* DCDC group CSR: supported voltages in microvolts */
127 static const struct regulator_linear_range dcdc_csr_ranges[] = {
128 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
129 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
130 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
131 };
132
133 /* DCDC group IOSR1: supported voltages in microvolts */
134 static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
135 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
136 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
137 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
138 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
139 };
140
141 /* DCDC group SDSR1: supported voltages in microvolts */
142 static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
143 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
144 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
145 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
146 };
147
148 struct bcm590xx_info {
149 const char *name;
150 const char *vin_name;
151 u8 n_voltages;
152 const unsigned int *volt_table;
153 u8 n_linear_ranges;
154 const struct regulator_linear_range *linear_ranges;
155 };
156
157 #define BCM590XX_REG_TABLE(_name, _table) \
158 { \
159 .name = #_name, \
160 .n_voltages = ARRAY_SIZE(_table), \
161 .volt_table = _table, \
162 }
163
164 #define BCM590XX_REG_RANGES(_name, _ranges) \
165 { \
166 .name = #_name, \
167 .n_voltages = 64, \
168 .n_linear_ranges = ARRAY_SIZE(_ranges), \
169 .linear_ranges = _ranges, \
170 }
171
172 static struct bcm590xx_info bcm590xx_regs[] = {
173 BCM590XX_REG_TABLE(rfldo, ldo_a_table),
174 BCM590XX_REG_TABLE(camldo1, ldo_c_table),
175 BCM590XX_REG_TABLE(camldo2, ldo_c_table),
176 BCM590XX_REG_TABLE(simldo1, ldo_a_table),
177 BCM590XX_REG_TABLE(simldo2, ldo_a_table),
178 BCM590XX_REG_TABLE(sdldo, ldo_c_table),
179 BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
180 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
181 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
182 BCM590XX_REG_TABLE(audldo, ldo_a_table),
183 BCM590XX_REG_TABLE(micldo, ldo_a_table),
184 BCM590XX_REG_TABLE(usbldo, ldo_a_table),
185 BCM590XX_REG_TABLE(vibldo, ldo_c_table),
186 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
187 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
188 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
189 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
190 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
191 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
192 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
193 BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
194 BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
195 BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
196 BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
197 BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
198 BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
199 BCM590XX_REG_TABLE(vbus, ldo_vbus),
200 };
201
202 struct bcm590xx_reg {
203 struct regulator_desc *desc;
204 struct bcm590xx *mfd;
205 struct bcm590xx_info **info;
206 };
207
208 static int bcm590xx_get_vsel_register(int id)
209 {
210 if (BCM590XX_REG_IS_LDO(id))
211 return BCM590XX_RFLDOCTRL + id;
212 else if (BCM590XX_REG_IS_GPLDO(id))
213 return BCM590XX_GPLDO1CTRL + id;
214 else
215 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
216 }
217
218 static int bcm590xx_get_enable_register(int id)
219 {
220 int reg = 0;
221
222 if (BCM590XX_REG_IS_LDO(id))
223 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
224 else if (BCM590XX_REG_IS_GPLDO(id))
225 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
226 else
227 switch (id) {
228 case BCM590XX_REG_CSR:
229 reg = BCM590XX_CSRPMCTRL1;
230 break;
231 case BCM590XX_REG_IOSR1:
232 reg = BCM590XX_IOSR1PMCTRL1;
233 break;
234 case BCM590XX_REG_IOSR2:
235 reg = BCM590XX_IOSR2PMCTRL1;
236 break;
237 case BCM590XX_REG_MSR:
238 reg = BCM590XX_MSRPMCTRL1;
239 break;
240 case BCM590XX_REG_SDSR1:
241 reg = BCM590XX_SDSR1PMCTRL1;
242 break;
243 case BCM590XX_REG_SDSR2:
244 reg = BCM590XX_SDSR2PMCTRL1;
245 break;
246 case BCM590XX_REG_VBUS:
247 reg = BCM590XX_OTG_CTRL;
248 };
249
250
251 return reg;
252 }
253
254 static struct regulator_ops bcm590xx_ops_ldo = {
255 .is_enabled = regulator_is_enabled_regmap,
256 .enable = regulator_enable_regmap,
257 .disable = regulator_disable_regmap,
258 .get_voltage_sel = regulator_get_voltage_sel_regmap,
259 .set_voltage_sel = regulator_set_voltage_sel_regmap,
260 .list_voltage = regulator_list_voltage_table,
261 .map_voltage = regulator_map_voltage_iterate,
262 };
263
264 static struct regulator_ops bcm590xx_ops_dcdc = {
265 .is_enabled = regulator_is_enabled_regmap,
266 .enable = regulator_enable_regmap,
267 .disable = regulator_disable_regmap,
268 .get_voltage_sel = regulator_get_voltage_sel_regmap,
269 .set_voltage_sel = regulator_set_voltage_sel_regmap,
270 .list_voltage = regulator_list_voltage_linear_range,
271 .map_voltage = regulator_map_voltage_linear_range,
272 };
273
274 static struct regulator_ops bcm590xx_ops_vbus = {
275 .is_enabled = regulator_is_enabled_regmap,
276 .enable = regulator_enable_regmap,
277 .disable = regulator_disable_regmap,
278 };
279
280 #define BCM590XX_MATCH(_name, _id) \
281 { \
282 .name = #_name, \
283 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
284 }
285
286 static struct of_regulator_match bcm590xx_matches[] = {
287 BCM590XX_MATCH(rfldo, RFLDO),
288 BCM590XX_MATCH(camldo1, CAMLDO1),
289 BCM590XX_MATCH(camldo2, CAMLDO2),
290 BCM590XX_MATCH(simldo1, SIMLDO1),
291 BCM590XX_MATCH(simldo2, SIMLDO2),
292 BCM590XX_MATCH(sdldo, SDLDO),
293 BCM590XX_MATCH(sdxldo, SDXLDO),
294 BCM590XX_MATCH(mmcldo1, MMCLDO1),
295 BCM590XX_MATCH(mmcldo2, MMCLDO2),
296 BCM590XX_MATCH(audldo, AUDLDO),
297 BCM590XX_MATCH(micldo, MICLDO),
298 BCM590XX_MATCH(usbldo, USBLDO),
299 BCM590XX_MATCH(vibldo, VIBLDO),
300 BCM590XX_MATCH(csr, CSR),
301 BCM590XX_MATCH(iosr1, IOSR1),
302 BCM590XX_MATCH(iosr2, IOSR2),
303 BCM590XX_MATCH(msr, MSR),
304 BCM590XX_MATCH(sdsr1, SDSR1),
305 BCM590XX_MATCH(sdsr2, SDSR2),
306 BCM590XX_MATCH(vsr, VSR),
307 BCM590XX_MATCH(gpldo1, GPLDO1),
308 BCM590XX_MATCH(gpldo2, GPLDO2),
309 BCM590XX_MATCH(gpldo3, GPLDO3),
310 BCM590XX_MATCH(gpldo4, GPLDO4),
311 BCM590XX_MATCH(gpldo5, GPLDO5),
312 BCM590XX_MATCH(gpldo6, GPLDO6),
313 BCM590XX_MATCH(vbus, VBUS),
314 };
315
316 static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
317 struct platform_device *pdev,
318 struct of_regulator_match **bcm590xx_reg_matches)
319 {
320 struct bcm590xx_board *data;
321 struct device_node *np = pdev->dev.parent->of_node;
322 struct device_node *regulators;
323 struct of_regulator_match *matches = bcm590xx_matches;
324 int count = ARRAY_SIZE(bcm590xx_matches);
325 int idx = 0;
326 int ret;
327
328 if (!np) {
329 dev_err(&pdev->dev, "of node not found\n");
330 return NULL;
331 }
332
333 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
334 if (!data) {
335 dev_err(&pdev->dev, "failed to allocate regulator board data\n");
336 return NULL;
337 }
338
339 np = of_node_get(np);
340 regulators = of_get_child_by_name(np, "regulators");
341 if (!regulators) {
342 dev_warn(&pdev->dev, "regulator node not found\n");
343 return NULL;
344 }
345
346 ret = of_regulator_match(&pdev->dev, regulators, matches, count);
347 of_node_put(regulators);
348 if (ret < 0) {
349 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
350 ret);
351 return NULL;
352 }
353
354 *bcm590xx_reg_matches = matches;
355
356 for (idx = 0; idx < count; idx++) {
357 if (!matches[idx].init_data || !matches[idx].of_node)
358 continue;
359
360 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
361 }
362
363 return data;
364 }
365
366 static int bcm590xx_probe(struct platform_device *pdev)
367 {
368 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
369 struct bcm590xx_board *pmu_data = NULL;
370 struct bcm590xx_reg *pmu;
371 struct regulator_config config = { };
372 struct bcm590xx_info *info;
373 struct regulator_init_data *reg_data;
374 struct regulator_dev *rdev;
375 struct of_regulator_match *bcm590xx_reg_matches = NULL;
376 int i;
377
378 pmu_data = bcm590xx_parse_dt_reg_data(pdev,
379 &bcm590xx_reg_matches);
380
381 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
382 if (!pmu) {
383 dev_err(&pdev->dev, "Memory allocation failed for pmu\n");
384 return -ENOMEM;
385 }
386
387 pmu->mfd = bcm590xx;
388
389 platform_set_drvdata(pdev, pmu);
390
391 pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
392 sizeof(struct regulator_desc), GFP_KERNEL);
393 if (!pmu->desc) {
394 dev_err(&pdev->dev, "Memory alloc fails for desc\n");
395 return -ENOMEM;
396 }
397
398 pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
399 sizeof(struct bcm590xx_info *), GFP_KERNEL);
400 if (!pmu->info) {
401 dev_err(&pdev->dev, "Memory alloc fails for info\n");
402 return -ENOMEM;
403 }
404
405 info = bcm590xx_regs;
406
407 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
408 if (pmu_data)
409 reg_data = pmu_data->bcm590xx_pmu_init_data[i];
410 else
411 reg_data = NULL;
412
413 /* Register the regulators */
414 pmu->info[i] = info;
415
416 pmu->desc[i].name = info->name;
417 pmu->desc[i].supply_name = info->vin_name;
418 pmu->desc[i].id = i;
419 pmu->desc[i].volt_table = info->volt_table;
420 pmu->desc[i].n_voltages = info->n_voltages;
421 pmu->desc[i].linear_ranges = info->linear_ranges;
422 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
423
424 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
425 pmu->desc[i].ops = &bcm590xx_ops_ldo;
426 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
427 } else if (BCM590XX_REG_IS_VBUS(i))
428 pmu->desc[i].ops = &bcm590xx_ops_vbus;
429 else {
430 pmu->desc[i].ops = &bcm590xx_ops_dcdc;
431 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
432 }
433
434 if (BCM590XX_REG_IS_VBUS(i))
435 pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
436 else {
437 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
438 pmu->desc[i].enable_is_inverted = true;
439 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
440 }
441 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
442 pmu->desc[i].type = REGULATOR_VOLTAGE;
443 pmu->desc[i].owner = THIS_MODULE;
444
445 config.dev = bcm590xx->dev;
446 config.init_data = reg_data;
447 config.driver_data = pmu;
448 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
449 config.regmap = bcm590xx->regmap_sec;
450 else
451 config.regmap = bcm590xx->regmap_pri;
452
453 if (bcm590xx_reg_matches)
454 config.of_node = bcm590xx_reg_matches[i].of_node;
455
456 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
457 &config);
458 if (IS_ERR(rdev)) {
459 dev_err(bcm590xx->dev,
460 "failed to register %s regulator\n",
461 pdev->name);
462 return PTR_ERR(rdev);
463 }
464 }
465
466 return 0;
467 }
468
469 static struct platform_driver bcm590xx_regulator_driver = {
470 .driver = {
471 .name = "bcm590xx-vregs",
472 .owner = THIS_MODULE,
473 },
474 .probe = bcm590xx_probe,
475 };
476 module_platform_driver(bcm590xx_regulator_driver);
477
478 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
479 MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
480 MODULE_LICENSE("GPL v2");
481 MODULE_ALIAS("platform:bcm590xx-vregs");
Linux with added FPC-III support