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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 /* 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, \
126                 .n_voltages = 64, \
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;
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 
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                 }
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");
404 MODULE_ALIAS("platform:bcm590xx-vregs");
405 

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