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Matt Porter462c9fc2014-03-11 11:46:13 -04001/*
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
Matt Porterc6466952014-04-23 19:21:32 -040025/* I2C slave 0 registers */
Matt Porter462c9fc2014-03-11 11:46:13 -040026#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
Matt Porter462c9fc2014-03-11 11:46:13 -040034#define BCM590XX_RFLDOCTRL 0x96
35#define BCM590XX_CSRVOUT1 0xc0
Matt Porterc6466952014-04-23 19:21:32 -040036
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)
Matt Porter462c9fc2014-03-11 11:46:13 -040054#define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3)
55#define BCM590XX_SR_VSEL_MASK GENMASK(5, 0)
56
Matt Porterc6466952014-04-23 19:21:32 -040057/*
58 * RFLDO to VSR regulators are
59 * accessed via I2C slave 0
60 */
61
Matt Porter462c9fc2014-03-11 11:46:13 -040062/* 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
Matt Porterc6466952014-04-23 19:21:32 -040086/*
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
Matt Porter462c9fc2014-03-11 11:46:13 -0400100
101#define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR)
Matt Porterc6466952014-04-23 19:21:32 -0400102#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)
Matt Porter462c9fc2014-03-11 11:46:13 -0400105
106struct bcm590xx_board {
107 struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
108};
109
110/* LDO group A: supported voltages in microvolts */
111static 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 */
117static const unsigned int ldo_c_table[] = {
118 3100000, 1800000, 2500000, 2700000, 2800000,
119 2900000, 3000000, 3300000,
120};
121
122/* DCDC group CSR: supported voltages in microvolts */
123static const struct regulator_linear_range dcdc_csr_ranges[] = {
124 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
125 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
126 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
127};
128
129/* DCDC group IOSR1: supported voltages in microvolts */
130static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
131 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
132 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
133 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
134 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
135};
136
137/* DCDC group SDSR1: supported voltages in microvolts */
138static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
139 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
140 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
141 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
142};
143
144struct bcm590xx_info {
145 const char *name;
146 const char *vin_name;
147 u8 n_voltages;
148 const unsigned int *volt_table;
149 u8 n_linear_ranges;
150 const struct regulator_linear_range *linear_ranges;
151};
152
153#define BCM590XX_REG_TABLE(_name, _table) \
154 { \
155 .name = #_name, \
156 .n_voltages = ARRAY_SIZE(_table), \
157 .volt_table = _table, \
158 }
159
160#define BCM590XX_REG_RANGES(_name, _ranges) \
161 { \
162 .name = #_name, \
Tim Kryger1e791402014-04-10 13:04:00 -0700163 .n_voltages = 64, \
Matt Porter462c9fc2014-03-11 11:46:13 -0400164 .n_linear_ranges = ARRAY_SIZE(_ranges), \
165 .linear_ranges = _ranges, \
166 }
167
168static struct bcm590xx_info bcm590xx_regs[] = {
169 BCM590XX_REG_TABLE(rfldo, ldo_a_table),
170 BCM590XX_REG_TABLE(camldo1, ldo_c_table),
171 BCM590XX_REG_TABLE(camldo2, ldo_c_table),
172 BCM590XX_REG_TABLE(simldo1, ldo_a_table),
173 BCM590XX_REG_TABLE(simldo2, ldo_a_table),
174 BCM590XX_REG_TABLE(sdldo, ldo_c_table),
175 BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
176 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
177 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
178 BCM590XX_REG_TABLE(audldo, ldo_a_table),
179 BCM590XX_REG_TABLE(micldo, ldo_a_table),
180 BCM590XX_REG_TABLE(usbldo, ldo_a_table),
181 BCM590XX_REG_TABLE(vibldo, ldo_c_table),
182 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
183 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
184 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
185 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
186 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
187 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
188 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
Matt Porterc6466952014-04-23 19:21:32 -0400189 BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
190 BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
191 BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
192 BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
193 BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
194 BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
Matt Porter462c9fc2014-03-11 11:46:13 -0400195};
196
197struct bcm590xx_reg {
198 struct regulator_desc *desc;
199 struct bcm590xx *mfd;
Matt Porter462c9fc2014-03-11 11:46:13 -0400200 struct bcm590xx_info **info;
201};
202
203static int bcm590xx_get_vsel_register(int id)
204{
205 if (BCM590XX_REG_IS_LDO(id))
206 return BCM590XX_RFLDOCTRL + id;
Matt Porterc6466952014-04-23 19:21:32 -0400207 else if (BCM590XX_REG_IS_GPLDO(id))
208 return BCM590XX_GPLDO1CTRL + id;
Matt Porter462c9fc2014-03-11 11:46:13 -0400209 else
210 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
211}
212
213static int bcm590xx_get_enable_register(int id)
214{
215 int reg = 0;
216
217 if (BCM590XX_REG_IS_LDO(id))
218 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
Matt Porterc6466952014-04-23 19:21:32 -0400219 else if (BCM590XX_REG_IS_GPLDO(id))
220 reg = BCM590XX_GPLDO1PMCTRL1 + id * 2;
Matt Porter462c9fc2014-03-11 11:46:13 -0400221 else
222 switch (id) {
223 case BCM590XX_REG_CSR:
224 reg = BCM590XX_CSRPMCTRL1;
225 break;
226 case BCM590XX_REG_IOSR1:
227 reg = BCM590XX_IOSR1PMCTRL1;
228 break;
229 case BCM590XX_REG_IOSR2:
230 reg = BCM590XX_IOSR2PMCTRL1;
231 break;
232 case BCM590XX_REG_MSR:
233 reg = BCM590XX_MSRPMCTRL1;
234 break;
235 case BCM590XX_REG_SDSR1:
236 reg = BCM590XX_SDSR1PMCTRL1;
237 break;
238 case BCM590XX_REG_SDSR2:
239 reg = BCM590XX_SDSR2PMCTRL1;
240 break;
Matt Porterc6466952014-04-23 19:21:32 -0400241 case BCM590XX_REG_VBUS:
242 reg = BCM590XX_OTG_CTRL;
Matt Porter462c9fc2014-03-11 11:46:13 -0400243 };
244
Matt Porterc6466952014-04-23 19:21:32 -0400245
Matt Porter462c9fc2014-03-11 11:46:13 -0400246 return reg;
247}
248
249static struct regulator_ops bcm590xx_ops_ldo = {
250 .is_enabled = regulator_is_enabled_regmap,
251 .enable = regulator_enable_regmap,
252 .disable = regulator_disable_regmap,
253 .get_voltage_sel = regulator_get_voltage_sel_regmap,
254 .set_voltage_sel = regulator_set_voltage_sel_regmap,
255 .list_voltage = regulator_list_voltage_table,
256 .map_voltage = regulator_map_voltage_iterate,
257};
258
259static struct regulator_ops bcm590xx_ops_dcdc = {
260 .is_enabled = regulator_is_enabled_regmap,
261 .enable = regulator_enable_regmap,
262 .disable = regulator_disable_regmap,
263 .get_voltage_sel = regulator_get_voltage_sel_regmap,
264 .set_voltage_sel = regulator_set_voltage_sel_regmap,
265 .list_voltage = regulator_list_voltage_linear_range,
266 .map_voltage = regulator_map_voltage_linear_range,
267};
268
Matt Porterc6466952014-04-23 19:21:32 -0400269static struct regulator_ops bcm590xx_ops_vbus = {
270 .is_enabled = regulator_is_enabled_regmap,
271 .enable = regulator_enable_regmap,
272 .disable = regulator_disable_regmap,
273};
274
Matt Porter462c9fc2014-03-11 11:46:13 -0400275#define BCM590XX_MATCH(_name, _id) \
276 { \
277 .name = #_name, \
278 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
279 }
280
281static struct of_regulator_match bcm590xx_matches[] = {
282 BCM590XX_MATCH(rfldo, RFLDO),
283 BCM590XX_MATCH(camldo1, CAMLDO1),
284 BCM590XX_MATCH(camldo2, CAMLDO2),
285 BCM590XX_MATCH(simldo1, SIMLDO1),
286 BCM590XX_MATCH(simldo2, SIMLDO2),
287 BCM590XX_MATCH(sdldo, SDLDO),
288 BCM590XX_MATCH(sdxldo, SDXLDO),
289 BCM590XX_MATCH(mmcldo1, MMCLDO1),
290 BCM590XX_MATCH(mmcldo2, MMCLDO2),
291 BCM590XX_MATCH(audldo, AUDLDO),
292 BCM590XX_MATCH(micldo, MICLDO),
293 BCM590XX_MATCH(usbldo, USBLDO),
294 BCM590XX_MATCH(vibldo, VIBLDO),
295 BCM590XX_MATCH(csr, CSR),
296 BCM590XX_MATCH(iosr1, IOSR1),
297 BCM590XX_MATCH(iosr2, IOSR2),
298 BCM590XX_MATCH(msr, MSR),
299 BCM590XX_MATCH(sdsr1, SDSR1),
300 BCM590XX_MATCH(sdsr2, SDSR2),
301 BCM590XX_MATCH(vsr, VSR),
Matt Porterc6466952014-04-23 19:21:32 -0400302 BCM590XX_MATCH(gpldo1, GPLDO1),
303 BCM590XX_MATCH(gpldo2, GPLDO2),
304 BCM590XX_MATCH(gpldo3, GPLDO3),
305 BCM590XX_MATCH(gpldo4, GPLDO4),
306 BCM590XX_MATCH(gpldo5, GPLDO5),
307 BCM590XX_MATCH(gpldo6, GPLDO6),
308 BCM590XX_MATCH(vbus, VBUS),
Matt Porter462c9fc2014-03-11 11:46:13 -0400309};
310
311static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
312 struct platform_device *pdev,
313 struct of_regulator_match **bcm590xx_reg_matches)
314{
315 struct bcm590xx_board *data;
316 struct device_node *np = pdev->dev.parent->of_node;
317 struct device_node *regulators;
318 struct of_regulator_match *matches = bcm590xx_matches;
319 int count = ARRAY_SIZE(bcm590xx_matches);
320 int idx = 0;
321 int ret;
322
323 if (!np) {
324 dev_err(&pdev->dev, "of node not found\n");
325 return NULL;
326 }
327
328 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
329 if (!data) {
330 dev_err(&pdev->dev, "failed to allocate regulator board data\n");
331 return NULL;
332 }
333
334 np = of_node_get(np);
335 regulators = of_get_child_by_name(np, "regulators");
336 if (!regulators) {
337 dev_warn(&pdev->dev, "regulator node not found\n");
338 return NULL;
339 }
340
341 ret = of_regulator_match(&pdev->dev, regulators, matches, count);
342 of_node_put(regulators);
343 if (ret < 0) {
344 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
345 ret);
346 return NULL;
347 }
348
349 *bcm590xx_reg_matches = matches;
350
351 for (idx = 0; idx < count; idx++) {
352 if (!matches[idx].init_data || !matches[idx].of_node)
353 continue;
354
355 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
356 }
357
358 return data;
359}
360
361static int bcm590xx_probe(struct platform_device *pdev)
362{
363 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
364 struct bcm590xx_board *pmu_data = NULL;
365 struct bcm590xx_reg *pmu;
366 struct regulator_config config = { };
367 struct bcm590xx_info *info;
368 struct regulator_init_data *reg_data;
369 struct regulator_dev *rdev;
370 struct of_regulator_match *bcm590xx_reg_matches = NULL;
371 int i;
372
373 pmu_data = bcm590xx_parse_dt_reg_data(pdev,
374 &bcm590xx_reg_matches);
375
376 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
377 if (!pmu) {
378 dev_err(&pdev->dev, "Memory allocation failed for pmu\n");
379 return -ENOMEM;
380 }
381
382 pmu->mfd = bcm590xx;
383
384 platform_set_drvdata(pdev, pmu);
385
386 pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
387 sizeof(struct regulator_desc), GFP_KERNEL);
388 if (!pmu->desc) {
389 dev_err(&pdev->dev, "Memory alloc fails for desc\n");
390 return -ENOMEM;
391 }
392
393 pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
394 sizeof(struct bcm590xx_info *), GFP_KERNEL);
395 if (!pmu->info) {
396 dev_err(&pdev->dev, "Memory alloc fails for info\n");
397 return -ENOMEM;
398 }
399
Matt Porter462c9fc2014-03-11 11:46:13 -0400400 info = bcm590xx_regs;
401
402 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
403 if (pmu_data)
404 reg_data = pmu_data->bcm590xx_pmu_init_data[i];
405 else
406 reg_data = NULL;
407
408 /* Register the regulators */
409 pmu->info[i] = info;
410
411 pmu->desc[i].name = info->name;
412 pmu->desc[i].supply_name = info->vin_name;
413 pmu->desc[i].id = i;
414 pmu->desc[i].volt_table = info->volt_table;
415 pmu->desc[i].n_voltages = info->n_voltages;
416 pmu->desc[i].linear_ranges = info->linear_ranges;
417 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
418
Matt Porterc6466952014-04-23 19:21:32 -0400419 if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) {
Matt Porter462c9fc2014-03-11 11:46:13 -0400420 pmu->desc[i].ops = &bcm590xx_ops_ldo;
421 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
Matt Porterc6466952014-04-23 19:21:32 -0400422 } else if (BCM590XX_REG_IS_VBUS(i))
423 pmu->desc[i].ops = &bcm590xx_ops_vbus;
424 else {
Matt Porter462c9fc2014-03-11 11:46:13 -0400425 pmu->desc[i].ops = &bcm590xx_ops_dcdc;
426 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
427 }
428
Matt Porterc6466952014-04-23 19:21:32 -0400429 if (BCM590XX_REG_IS_VBUS(i))
430 pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE;
431 else {
432 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
433 pmu->desc[i].enable_is_inverted = true;
434 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
435 }
Matt Porter462c9fc2014-03-11 11:46:13 -0400436 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
437 pmu->desc[i].type = REGULATOR_VOLTAGE;
438 pmu->desc[i].owner = THIS_MODULE;
439
440 config.dev = bcm590xx->dev;
441 config.init_data = reg_data;
442 config.driver_data = pmu;
Matt Porterc6466952014-04-23 19:21:32 -0400443 if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i))
444 config.regmap = bcm590xx->regmap_sec;
445 else
446 config.regmap = bcm590xx->regmap_pri;
Matt Porter462c9fc2014-03-11 11:46:13 -0400447
448 if (bcm590xx_reg_matches)
449 config.of_node = bcm590xx_reg_matches[i].of_node;
450
451 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
452 &config);
453 if (IS_ERR(rdev)) {
454 dev_err(bcm590xx->dev,
455 "failed to register %s regulator\n",
456 pdev->name);
457 return PTR_ERR(rdev);
458 }
Matt Porter462c9fc2014-03-11 11:46:13 -0400459 }
460
461 return 0;
462}
463
464static struct platform_driver bcm590xx_regulator_driver = {
465 .driver = {
466 .name = "bcm590xx-vregs",
467 .owner = THIS_MODULE,
468 },
469 .probe = bcm590xx_probe,
470};
471module_platform_driver(bcm590xx_regulator_driver);
472
473MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
474MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
475MODULE_LICENSE("GPL v2");
Axel Linc9347432014-03-14 09:57:54 +0800476MODULE_ALIAS("platform:bcm590xx-vregs");