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Linux/drivers/regulator/bcm590xx-regulator.c

  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");
482 

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