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462c9fc5 MP |
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 | ||
69 | struct bcm590xx_board { | |
70 | struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS]; | |
71 | }; | |
72 | ||
73 | /* LDO group A: supported voltages in microvolts */ | |
74 | static 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 */ | |
80 | static 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 */ | |
86 | static 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 */ | |
93 | static 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 */ | |
101 | static 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 | ||
107 | struct 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, \ | |
1e791405 | 126 | .n_voltages = 64, \ |
462c9fc5 MP |
127 | .n_linear_ranges = ARRAY_SIZE(_ranges), \ |
128 | .linear_ranges = _ranges, \ | |
129 | } | |
130 | ||
131 | static struct bcm590xx_info bcm590xx_regs[] = { | |
132 | BCM590XX_REG_TABLE(rfldo, ldo_a_table), | |
133 | BCM590XX_REG_TABLE(camldo1, ldo_c_table), | |
134 | BCM590XX_REG_TABLE(camldo2, ldo_c_table), | |
135 | BCM590XX_REG_TABLE(simldo1, ldo_a_table), | |
136 | BCM590XX_REG_TABLE(simldo2, ldo_a_table), | |
137 | BCM590XX_REG_TABLE(sdldo, ldo_c_table), | |
138 | BCM590XX_REG_TABLE(sdxldo, ldo_a_table), | |
139 | BCM590XX_REG_TABLE(mmcldo1, ldo_a_table), | |
140 | BCM590XX_REG_TABLE(mmcldo2, ldo_a_table), | |
141 | BCM590XX_REG_TABLE(audldo, ldo_a_table), | |
142 | BCM590XX_REG_TABLE(micldo, ldo_a_table), | |
143 | BCM590XX_REG_TABLE(usbldo, ldo_a_table), | |
144 | BCM590XX_REG_TABLE(vibldo, ldo_c_table), | |
145 | BCM590XX_REG_RANGES(csr, dcdc_csr_ranges), | |
146 | BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges), | |
147 | BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges), | |
148 | BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges), | |
149 | BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges), | |
150 | BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges), | |
151 | BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges), | |
152 | }; | |
153 | ||
154 | struct bcm590xx_reg { | |
155 | struct regulator_desc *desc; | |
156 | struct bcm590xx *mfd; | |
462c9fc5 MP |
157 | struct bcm590xx_info **info; |
158 | }; | |
159 | ||
160 | static int bcm590xx_get_vsel_register(int id) | |
161 | { | |
162 | if (BCM590XX_REG_IS_LDO(id)) | |
163 | return BCM590XX_RFLDOCTRL + id; | |
164 | else | |
165 | return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3; | |
166 | } | |
167 | ||
168 | static int bcm590xx_get_enable_register(int id) | |
169 | { | |
170 | int reg = 0; | |
171 | ||
172 | if (BCM590XX_REG_IS_LDO(id)) | |
173 | reg = BCM590XX_RFLDOPMCTRL1 + id * 2; | |
174 | else | |
175 | switch (id) { | |
176 | case BCM590XX_REG_CSR: | |
177 | reg = BCM590XX_CSRPMCTRL1; | |
178 | break; | |
179 | case BCM590XX_REG_IOSR1: | |
180 | reg = BCM590XX_IOSR1PMCTRL1; | |
181 | break; | |
182 | case BCM590XX_REG_IOSR2: | |
183 | reg = BCM590XX_IOSR2PMCTRL1; | |
184 | break; | |
185 | case BCM590XX_REG_MSR: | |
186 | reg = BCM590XX_MSRPMCTRL1; | |
187 | break; | |
188 | case BCM590XX_REG_SDSR1: | |
189 | reg = BCM590XX_SDSR1PMCTRL1; | |
190 | break; | |
191 | case BCM590XX_REG_SDSR2: | |
192 | reg = BCM590XX_SDSR2PMCTRL1; | |
193 | break; | |
194 | }; | |
195 | ||
196 | return reg; | |
197 | } | |
198 | ||
199 | static struct regulator_ops bcm590xx_ops_ldo = { | |
200 | .is_enabled = regulator_is_enabled_regmap, | |
201 | .enable = regulator_enable_regmap, | |
202 | .disable = regulator_disable_regmap, | |
203 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
204 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
205 | .list_voltage = regulator_list_voltage_table, | |
206 | .map_voltage = regulator_map_voltage_iterate, | |
207 | }; | |
208 | ||
209 | static struct regulator_ops bcm590xx_ops_dcdc = { | |
210 | .is_enabled = regulator_is_enabled_regmap, | |
211 | .enable = regulator_enable_regmap, | |
212 | .disable = regulator_disable_regmap, | |
213 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
214 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
215 | .list_voltage = regulator_list_voltage_linear_range, | |
216 | .map_voltage = regulator_map_voltage_linear_range, | |
217 | }; | |
218 | ||
219 | #define BCM590XX_MATCH(_name, _id) \ | |
220 | { \ | |
221 | .name = #_name, \ | |
222 | .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \ | |
223 | } | |
224 | ||
225 | static struct of_regulator_match bcm590xx_matches[] = { | |
226 | BCM590XX_MATCH(rfldo, RFLDO), | |
227 | BCM590XX_MATCH(camldo1, CAMLDO1), | |
228 | BCM590XX_MATCH(camldo2, CAMLDO2), | |
229 | BCM590XX_MATCH(simldo1, SIMLDO1), | |
230 | BCM590XX_MATCH(simldo2, SIMLDO2), | |
231 | BCM590XX_MATCH(sdldo, SDLDO), | |
232 | BCM590XX_MATCH(sdxldo, SDXLDO), | |
233 | BCM590XX_MATCH(mmcldo1, MMCLDO1), | |
234 | BCM590XX_MATCH(mmcldo2, MMCLDO2), | |
235 | BCM590XX_MATCH(audldo, AUDLDO), | |
236 | BCM590XX_MATCH(micldo, MICLDO), | |
237 | BCM590XX_MATCH(usbldo, USBLDO), | |
238 | BCM590XX_MATCH(vibldo, VIBLDO), | |
239 | BCM590XX_MATCH(csr, CSR), | |
240 | BCM590XX_MATCH(iosr1, IOSR1), | |
241 | BCM590XX_MATCH(iosr2, IOSR2), | |
242 | BCM590XX_MATCH(msr, MSR), | |
243 | BCM590XX_MATCH(sdsr1, SDSR1), | |
244 | BCM590XX_MATCH(sdsr2, SDSR2), | |
245 | BCM590XX_MATCH(vsr, VSR), | |
246 | }; | |
247 | ||
248 | static struct bcm590xx_board *bcm590xx_parse_dt_reg_data( | |
249 | struct platform_device *pdev, | |
250 | struct of_regulator_match **bcm590xx_reg_matches) | |
251 | { | |
252 | struct bcm590xx_board *data; | |
253 | struct device_node *np = pdev->dev.parent->of_node; | |
254 | struct device_node *regulators; | |
255 | struct of_regulator_match *matches = bcm590xx_matches; | |
256 | int count = ARRAY_SIZE(bcm590xx_matches); | |
257 | int idx = 0; | |
258 | int ret; | |
259 | ||
260 | if (!np) { | |
261 | dev_err(&pdev->dev, "of node not found\n"); | |
262 | return NULL; | |
263 | } | |
264 | ||
265 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
266 | if (!data) { | |
267 | dev_err(&pdev->dev, "failed to allocate regulator board data\n"); | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | np = of_node_get(np); | |
272 | regulators = of_get_child_by_name(np, "regulators"); | |
273 | if (!regulators) { | |
274 | dev_warn(&pdev->dev, "regulator node not found\n"); | |
275 | return NULL; | |
276 | } | |
277 | ||
278 | ret = of_regulator_match(&pdev->dev, regulators, matches, count); | |
279 | of_node_put(regulators); | |
280 | if (ret < 0) { | |
281 | dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", | |
282 | ret); | |
283 | return NULL; | |
284 | } | |
285 | ||
286 | *bcm590xx_reg_matches = matches; | |
287 | ||
288 | for (idx = 0; idx < count; idx++) { | |
289 | if (!matches[idx].init_data || !matches[idx].of_node) | |
290 | continue; | |
291 | ||
292 | data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data; | |
293 | } | |
294 | ||
295 | return data; | |
296 | } | |
297 | ||
298 | static int bcm590xx_probe(struct platform_device *pdev) | |
299 | { | |
300 | struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent); | |
301 | struct bcm590xx_board *pmu_data = NULL; | |
302 | struct bcm590xx_reg *pmu; | |
303 | struct regulator_config config = { }; | |
304 | struct bcm590xx_info *info; | |
305 | struct regulator_init_data *reg_data; | |
306 | struct regulator_dev *rdev; | |
307 | struct of_regulator_match *bcm590xx_reg_matches = NULL; | |
308 | int i; | |
309 | ||
310 | pmu_data = bcm590xx_parse_dt_reg_data(pdev, | |
311 | &bcm590xx_reg_matches); | |
312 | ||
313 | pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); | |
314 | if (!pmu) { | |
315 | dev_err(&pdev->dev, "Memory allocation failed for pmu\n"); | |
316 | return -ENOMEM; | |
317 | } | |
318 | ||
319 | pmu->mfd = bcm590xx; | |
320 | ||
321 | platform_set_drvdata(pdev, pmu); | |
322 | ||
323 | pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * | |
324 | sizeof(struct regulator_desc), GFP_KERNEL); | |
325 | if (!pmu->desc) { | |
326 | dev_err(&pdev->dev, "Memory alloc fails for desc\n"); | |
327 | return -ENOMEM; | |
328 | } | |
329 | ||
330 | pmu->info = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * | |
331 | sizeof(struct bcm590xx_info *), GFP_KERNEL); | |
332 | if (!pmu->info) { | |
333 | dev_err(&pdev->dev, "Memory alloc fails for info\n"); | |
334 | return -ENOMEM; | |
335 | } | |
336 | ||
462c9fc5 MP |
337 | info = bcm590xx_regs; |
338 | ||
339 | for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) { | |
340 | if (pmu_data) | |
341 | reg_data = pmu_data->bcm590xx_pmu_init_data[i]; | |
342 | else | |
343 | reg_data = NULL; | |
344 | ||
345 | /* Register the regulators */ | |
346 | pmu->info[i] = info; | |
347 | ||
348 | pmu->desc[i].name = info->name; | |
349 | pmu->desc[i].supply_name = info->vin_name; | |
350 | pmu->desc[i].id = i; | |
351 | pmu->desc[i].volt_table = info->volt_table; | |
352 | pmu->desc[i].n_voltages = info->n_voltages; | |
353 | pmu->desc[i].linear_ranges = info->linear_ranges; | |
354 | pmu->desc[i].n_linear_ranges = info->n_linear_ranges; | |
355 | ||
356 | if (BCM590XX_REG_IS_LDO(i)) { | |
357 | pmu->desc[i].ops = &bcm590xx_ops_ldo; | |
358 | pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK; | |
359 | } else { | |
360 | pmu->desc[i].ops = &bcm590xx_ops_dcdc; | |
361 | pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK; | |
362 | } | |
363 | ||
364 | pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i); | |
365 | pmu->desc[i].enable_is_inverted = true; | |
366 | pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE; | |
367 | pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i); | |
368 | pmu->desc[i].type = REGULATOR_VOLTAGE; | |
369 | pmu->desc[i].owner = THIS_MODULE; | |
370 | ||
371 | config.dev = bcm590xx->dev; | |
372 | config.init_data = reg_data; | |
373 | config.driver_data = pmu; | |
374 | config.regmap = bcm590xx->regmap; | |
375 | ||
376 | if (bcm590xx_reg_matches) | |
377 | config.of_node = bcm590xx_reg_matches[i].of_node; | |
378 | ||
379 | rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i], | |
380 | &config); | |
381 | if (IS_ERR(rdev)) { | |
382 | dev_err(bcm590xx->dev, | |
383 | "failed to register %s regulator\n", | |
384 | pdev->name); | |
385 | return PTR_ERR(rdev); | |
386 | } | |
462c9fc5 MP |
387 | } |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static struct platform_driver bcm590xx_regulator_driver = { | |
393 | .driver = { | |
394 | .name = "bcm590xx-vregs", | |
395 | .owner = THIS_MODULE, | |
396 | }, | |
397 | .probe = bcm590xx_probe, | |
398 | }; | |
399 | module_platform_driver(bcm590xx_regulator_driver); | |
400 | ||
401 | MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); | |
402 | MODULE_DESCRIPTION("BCM590xx voltage regulator driver"); | |
403 | MODULE_LICENSE("GPL v2"); | |
c9347431 | 404 | MODULE_ALIAS("platform:bcm590xx-vregs"); |