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Diffstat (limited to 'drivers/regulator/bcm590xx-regulator.c')
-rw-r--r--drivers/regulator/bcm590xx-regulator.c403
1 files changed, 403 insertions, 0 deletions
diff --git a/drivers/regulator/bcm590xx-regulator.c b/drivers/regulator/bcm590xx-regulator.c
new file mode 100644
index 000000000000..ab08ca7cfb08
--- /dev/null
+++ b/drivers/regulator/bcm590xx-regulator.c
@@ -0,0 +1,403 @@
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/* Register defs */
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_REG_ENABLE BIT(7)
35
36#define BCM590XX_RFLDOCTRL 0x96
37#define BCM590XX_CSRVOUT1 0xc0
38#define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3)
39#define BCM590XX_SR_VSEL_MASK GENMASK(5, 0)
40
41/* LDO regulator IDs */
42#define BCM590XX_REG_RFLDO 0
43#define BCM590XX_REG_CAMLDO1 1
44#define BCM590XX_REG_CAMLDO2 2
45#define BCM590XX_REG_SIMLDO1 3
46#define BCM590XX_REG_SIMLDO2 4
47#define BCM590XX_REG_SDLDO 5
48#define BCM590XX_REG_SDXLDO 6
49#define BCM590XX_REG_MMCLDO1 7
50#define BCM590XX_REG_MMCLDO2 8
51#define BCM590XX_REG_AUDLDO 9
52#define BCM590XX_REG_MICLDO 10
53#define BCM590XX_REG_USBLDO 11
54#define BCM590XX_REG_VIBLDO 12
55
56/* DCDC regulator IDs */
57#define BCM590XX_REG_CSR 13
58#define BCM590XX_REG_IOSR1 14
59#define BCM590XX_REG_IOSR2 15
60#define BCM590XX_REG_MSR 16
61#define BCM590XX_REG_SDSR1 17
62#define BCM590XX_REG_SDSR2 18
63#define BCM590XX_REG_VSR 19
64
65#define BCM590XX_NUM_REGS 20
66
67#define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR)
68
69struct bcm590xx_board {
70 struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
71};
72
73/* LDO group A: supported voltages in microvolts */
74static const unsigned int ldo_a_table[] = {
75 1200000, 1800000, 2500000, 2700000, 2800000,
76 2900000, 3000000, 3300000,
77};
78
79/* LDO group C: supported voltages in microvolts */
80static const unsigned int ldo_c_table[] = {
81 3100000, 1800000, 2500000, 2700000, 2800000,
82 2900000, 3000000, 3300000,
83};
84
85/* DCDC group CSR: supported voltages in microvolts */
86static const struct regulator_linear_range dcdc_csr_ranges[] = {
87 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
88 REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
89 REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
90};
91
92/* DCDC group IOSR1: supported voltages in microvolts */
93static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
94 REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
95 REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
96 REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
97 REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
98};
99
100/* DCDC group SDSR1: supported voltages in microvolts */
101static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
102 REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
103 REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
104 REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
105};
106
107struct bcm590xx_info {
108 const char *name;
109 const char *vin_name;
110 u8 n_voltages;
111 const unsigned int *volt_table;
112 u8 n_linear_ranges;
113 const struct regulator_linear_range *linear_ranges;
114};
115
116#define BCM590XX_REG_TABLE(_name, _table) \
117 { \
118 .name = #_name, \
119 .n_voltages = ARRAY_SIZE(_table), \
120 .volt_table = _table, \
121 }
122
123#define BCM590XX_REG_RANGES(_name, _ranges) \
124 { \
125 .name = #_name, \
126 .n_linear_ranges = ARRAY_SIZE(_ranges), \
127 .linear_ranges = _ranges, \
128 }
129
130static struct bcm590xx_info bcm590xx_regs[] = {
131 BCM590XX_REG_TABLE(rfldo, ldo_a_table),
132 BCM590XX_REG_TABLE(camldo1, ldo_c_table),
133 BCM590XX_REG_TABLE(camldo2, ldo_c_table),
134 BCM590XX_REG_TABLE(simldo1, ldo_a_table),
135 BCM590XX_REG_TABLE(simldo2, ldo_a_table),
136 BCM590XX_REG_TABLE(sdldo, ldo_c_table),
137 BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
138 BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
139 BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
140 BCM590XX_REG_TABLE(audldo, ldo_a_table),
141 BCM590XX_REG_TABLE(micldo, ldo_a_table),
142 BCM590XX_REG_TABLE(usbldo, ldo_a_table),
143 BCM590XX_REG_TABLE(vibldo, ldo_c_table),
144 BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
145 BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
146 BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
147 BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
148 BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
149 BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
150 BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
151};
152
153struct bcm590xx_reg {
154 struct regulator_desc *desc;
155 struct bcm590xx *mfd;
156 struct bcm590xx_info **info;
157};
158
159static int bcm590xx_get_vsel_register(int id)
160{
161 if (BCM590XX_REG_IS_LDO(id))
162 return BCM590XX_RFLDOCTRL + id;
163 else
164 return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3;
165}
166
167static int bcm590xx_get_enable_register(int id)
168{
169 int reg = 0;
170
171 if (BCM590XX_REG_IS_LDO(id))
172 reg = BCM590XX_RFLDOPMCTRL1 + id * 2;
173 else
174 switch (id) {
175 case BCM590XX_REG_CSR:
176 reg = BCM590XX_CSRPMCTRL1;
177 break;
178 case BCM590XX_REG_IOSR1:
179 reg = BCM590XX_IOSR1PMCTRL1;
180 break;
181 case BCM590XX_REG_IOSR2:
182 reg = BCM590XX_IOSR2PMCTRL1;
183 break;
184 case BCM590XX_REG_MSR:
185 reg = BCM590XX_MSRPMCTRL1;
186 break;
187 case BCM590XX_REG_SDSR1:
188 reg = BCM590XX_SDSR1PMCTRL1;
189 break;
190 case BCM590XX_REG_SDSR2:
191 reg = BCM590XX_SDSR2PMCTRL1;
192 break;
193 };
194
195 return reg;
196}
197
198static struct regulator_ops bcm590xx_ops_ldo = {
199 .is_enabled = regulator_is_enabled_regmap,
200 .enable = regulator_enable_regmap,
201 .disable = regulator_disable_regmap,
202 .get_voltage_sel = regulator_get_voltage_sel_regmap,
203 .set_voltage_sel = regulator_set_voltage_sel_regmap,
204 .list_voltage = regulator_list_voltage_table,
205 .map_voltage = regulator_map_voltage_iterate,
206};
207
208static struct regulator_ops bcm590xx_ops_dcdc = {
209 .is_enabled = regulator_is_enabled_regmap,
210 .enable = regulator_enable_regmap,
211 .disable = regulator_disable_regmap,
212 .get_voltage_sel = regulator_get_voltage_sel_regmap,
213 .set_voltage_sel = regulator_set_voltage_sel_regmap,
214 .list_voltage = regulator_list_voltage_linear_range,
215 .map_voltage = regulator_map_voltage_linear_range,
216};
217
218#define BCM590XX_MATCH(_name, _id) \
219 { \
220 .name = #_name, \
221 .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \
222 }
223
224static struct of_regulator_match bcm590xx_matches[] = {
225 BCM590XX_MATCH(rfldo, RFLDO),
226 BCM590XX_MATCH(camldo1, CAMLDO1),
227 BCM590XX_MATCH(camldo2, CAMLDO2),
228 BCM590XX_MATCH(simldo1, SIMLDO1),
229 BCM590XX_MATCH(simldo2, SIMLDO2),
230 BCM590XX_MATCH(sdldo, SDLDO),
231 BCM590XX_MATCH(sdxldo, SDXLDO),
232 BCM590XX_MATCH(mmcldo1, MMCLDO1),
233 BCM590XX_MATCH(mmcldo2, MMCLDO2),
234 BCM590XX_MATCH(audldo, AUDLDO),
235 BCM590XX_MATCH(micldo, MICLDO),
236 BCM590XX_MATCH(usbldo, USBLDO),
237 BCM590XX_MATCH(vibldo, VIBLDO),
238 BCM590XX_MATCH(csr, CSR),
239 BCM590XX_MATCH(iosr1, IOSR1),
240 BCM590XX_MATCH(iosr2, IOSR2),
241 BCM590XX_MATCH(msr, MSR),
242 BCM590XX_MATCH(sdsr1, SDSR1),
243 BCM590XX_MATCH(sdsr2, SDSR2),
244 BCM590XX_MATCH(vsr, VSR),
245};
246
247static struct bcm590xx_board *bcm590xx_parse_dt_reg_data(
248 struct platform_device *pdev,
249 struct of_regulator_match **bcm590xx_reg_matches)
250{
251 struct bcm590xx_board *data;
252 struct device_node *np = pdev->dev.parent->of_node;
253 struct device_node *regulators;
254 struct of_regulator_match *matches = bcm590xx_matches;
255 int count = ARRAY_SIZE(bcm590xx_matches);
256 int idx = 0;
257 int ret;
258
259 if (!np) {
260 dev_err(&pdev->dev, "of node not found\n");
261 return NULL;
262 }
263
264 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
265 if (!data) {
266 dev_err(&pdev->dev, "failed to allocate regulator board data\n");
267 return NULL;
268 }
269
270 np = of_node_get(np);
271 regulators = of_get_child_by_name(np, "regulators");
272 if (!regulators) {
273 dev_warn(&pdev->dev, "regulator node not found\n");
274 return NULL;
275 }
276
277 ret = of_regulator_match(&pdev->dev, regulators, matches, count);
278 of_node_put(regulators);
279 if (ret < 0) {
280 dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
281 ret);
282 return NULL;
283 }
284
285 *bcm590xx_reg_matches = matches;
286
287 for (idx = 0; idx < count; idx++) {
288 if (!matches[idx].init_data || !matches[idx].of_node)
289 continue;
290
291 data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data;
292 }
293
294 return data;
295}
296
297static int bcm590xx_probe(struct platform_device *pdev)
298{
299 struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent);
300 struct bcm590xx_board *pmu_data = NULL;
301 struct bcm590xx_reg *pmu;
302 struct regulator_config config = { };
303 struct bcm590xx_info *info;
304 struct regulator_init_data *reg_data;
305 struct regulator_dev *rdev;
306 struct of_regulator_match *bcm590xx_reg_matches = NULL;
307 int i;
308
309 pmu_data = bcm590xx_parse_dt_reg_data(pdev,
310 &bcm590xx_reg_matches);
311
312 pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL);
313 if (!pmu) {
314 dev_err(&pdev->dev, "Memory allocation failed for pmu\n");
315 return -ENOMEM;
316 }
317
318 pmu->mfd = bcm590xx;
319
320 platform_set_drvdata(pdev, pmu);
321
322 pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
323 sizeof(struct regulator_desc), GFP_KERNEL);
324 if (!pmu->desc) {
325 dev_err(&pdev->dev, "Memory alloc fails for desc\n");
326 return -ENOMEM;
327 }
328
329 pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS *
330 sizeof(struct bcm590xx_info *), GFP_KERNEL);
331 if (!pmu->info) {
332 dev_err(&pdev->dev, "Memory alloc fails for info\n");
333 return -ENOMEM;
334 }
335
336 info = bcm590xx_regs;
337
338 for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) {
339 if (pmu_data)
340 reg_data = pmu_data->bcm590xx_pmu_init_data[i];
341 else
342 reg_data = NULL;
343
344 /* Register the regulators */
345 pmu->info[i] = info;
346
347 pmu->desc[i].name = info->name;
348 pmu->desc[i].supply_name = info->vin_name;
349 pmu->desc[i].id = i;
350 pmu->desc[i].volt_table = info->volt_table;
351 pmu->desc[i].n_voltages = info->n_voltages;
352 pmu->desc[i].linear_ranges = info->linear_ranges;
353 pmu->desc[i].n_linear_ranges = info->n_linear_ranges;
354
355 if (BCM590XX_REG_IS_LDO(i)) {
356 pmu->desc[i].ops = &bcm590xx_ops_ldo;
357 pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK;
358 } else {
359 pmu->desc[i].ops = &bcm590xx_ops_dcdc;
360 pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK;
361 }
362
363 pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i);
364 pmu->desc[i].enable_is_inverted = true;
365 pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE;
366 pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i);
367 pmu->desc[i].type = REGULATOR_VOLTAGE;
368 pmu->desc[i].owner = THIS_MODULE;
369
370 config.dev = bcm590xx->dev;
371 config.init_data = reg_data;
372 config.driver_data = pmu;
373 config.regmap = bcm590xx->regmap;
374
375 if (bcm590xx_reg_matches)
376 config.of_node = bcm590xx_reg_matches[i].of_node;
377
378 rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i],
379 &config);
380 if (IS_ERR(rdev)) {
381 dev_err(bcm590xx->dev,
382 "failed to register %s regulator\n",
383 pdev->name);
384 return PTR_ERR(rdev);
385 }
386 }
387
388 return 0;
389}
390
391static struct platform_driver bcm590xx_regulator_driver = {
392 .driver = {
393 .name = "bcm590xx-vregs",
394 .owner = THIS_MODULE,
395 },
396 .probe = bcm590xx_probe,
397};
398module_platform_driver(bcm590xx_regulator_driver);
399
400MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
401MODULE_DESCRIPTION("BCM590xx voltage regulator driver");
402MODULE_LICENSE("GPL v2");
403MODULE_ALIAS("platform:bcm590xx-vregs");
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-05 11:48:15 -0400