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Linux/drivers/regulator/88pm800.c

  1 /*
  2  * Regulators driver for Marvell 88PM800
  3  *
  4  * Copyright (C) 2012 Marvell International Ltd.
  5  * Joseph(Yossi) Hanin <yhanin@marvell.com>
  6  * Yi Zhang <yizhang@marvell.com>
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  */
 12 #include <linux/module.h>
 13 #include <linux/moduleparam.h>
 14 #include <linux/init.h>
 15 #include <linux/err.h>
 16 #include <linux/regmap.h>
 17 #include <linux/regulator/driver.h>
 18 #include <linux/regulator/machine.h>
 19 #include <linux/mfd/88pm80x.h>
 20 #include <linux/delay.h>
 21 #include <linux/io.h>
 22 #include <linux/of.h>
 23 #include <linux/regulator/of_regulator.h>
 24 
 25 /* LDO1 with DVC[0..3] */
 26 #define PM800_LDO1_VOUT         (0x08) /* VOUT1 */
 27 #define PM800_LDO1_VOUT_2       (0x09)
 28 #define PM800_LDO1_VOUT_3       (0x0A)
 29 #define PM800_LDO2_VOUT         (0x0B)
 30 #define PM800_LDO3_VOUT         (0x0C)
 31 #define PM800_LDO4_VOUT         (0x0D)
 32 #define PM800_LDO5_VOUT         (0x0E)
 33 #define PM800_LDO6_VOUT         (0x0F)
 34 #define PM800_LDO7_VOUT         (0x10)
 35 #define PM800_LDO8_VOUT         (0x11)
 36 #define PM800_LDO9_VOUT         (0x12)
 37 #define PM800_LDO10_VOUT        (0x13)
 38 #define PM800_LDO11_VOUT        (0x14)
 39 #define PM800_LDO12_VOUT        (0x15)
 40 #define PM800_LDO13_VOUT        (0x16)
 41 #define PM800_LDO14_VOUT        (0x17)
 42 #define PM800_LDO15_VOUT        (0x18)
 43 #define PM800_LDO16_VOUT        (0x19)
 44 #define PM800_LDO17_VOUT        (0x1A)
 45 #define PM800_LDO18_VOUT        (0x1B)
 46 #define PM800_LDO19_VOUT        (0x1C)
 47 
 48 /* BUCK1 with DVC[0..3] */
 49 #define PM800_BUCK1             (0x3C)
 50 #define PM800_BUCK1_1           (0x3D)
 51 #define PM800_BUCK1_2           (0x3E)
 52 #define PM800_BUCK1_3           (0x3F)
 53 #define PM800_BUCK2             (0x40)
 54 #define PM800_BUCK3             (0x41)
 55 #define PM800_BUCK4             (0x42)
 56 #define PM800_BUCK4_1           (0x43)
 57 #define PM800_BUCK4_2           (0x44)
 58 #define PM800_BUCK4_3           (0x45)
 59 #define PM800_BUCK5             (0x46)
 60 
 61 #define PM800_BUCK_ENA          (0x50)
 62 #define PM800_LDO_ENA1_1        (0x51)
 63 #define PM800_LDO_ENA1_2        (0x52)
 64 #define PM800_LDO_ENA1_3        (0x53)
 65 
 66 #define PM800_LDO_ENA2_1        (0x56)
 67 #define PM800_LDO_ENA2_2        (0x57)
 68 #define PM800_LDO_ENA2_3        (0x58)
 69 
 70 #define PM800_BUCK1_MISC1       (0x78)
 71 #define PM800_BUCK3_MISC1       (0x7E)
 72 #define PM800_BUCK4_MISC1       (0x81)
 73 #define PM800_BUCK5_MISC1       (0x84)
 74 
 75 struct pm800_regulator_info {
 76         struct regulator_desc desc;
 77         int max_ua;
 78 };
 79 
 80 struct pm800_regulators {
 81         struct regulator_dev *regulators[PM800_ID_RG_MAX];
 82         struct pm80x_chip *chip;
 83         struct regmap *map;
 84 };
 85 
 86 /*
 87  * vreg - the buck regs string.
 88  * ereg - the string for the enable register.
 89  * ebit - the bit number in the enable register.
 90  * amax - the current
 91  * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
 92  * not the constant voltage table.
 93  * n_volt - Number of available selectors
 94  */
 95 #define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt)         \
 96 {                                                                       \
 97         .desc   = {                                                     \
 98                 .name   = #vreg,                                        \
 99                 .ops    = &pm800_volt_range_ops,                        \
100                 .type   = REGULATOR_VOLTAGE,                            \
101                 .id     = PM800_ID_##vreg,                              \
102                 .owner  = THIS_MODULE,                                  \
103                 .n_voltages             = n_volt,                       \
104                 .linear_ranges          = volt_ranges,                  \
105                 .n_linear_ranges        = ARRAY_SIZE(volt_ranges),      \
106                 .vsel_reg               = PM800_##vreg,                 \
107                 .vsel_mask              = 0x7f,                         \
108                 .enable_reg             = PM800_##ereg,                 \
109                 .enable_mask            = 1 << (ebit),                  \
110         },                                                              \
111         .max_ua         = (amax),                                       \
112 }
113 
114 /*
115  * vreg - the LDO regs string
116  * ereg -  the string for the enable register.
117  * ebit - the bit number in the enable register.
118  * amax - the current
119  * volt_table - the LDO voltage table
120  * For all the LDOes, there are too many ranges. Using volt_table will be
121  * simpler and faster.
122  */
123 #define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table)               \
124 {                                                                       \
125         .desc   = {                                                     \
126                 .name   = #vreg,                                        \
127                 .ops    = &pm800_volt_table_ops,                        \
128                 .type   = REGULATOR_VOLTAGE,                            \
129                 .id     = PM800_ID_##vreg,                              \
130                 .owner  = THIS_MODULE,                                  \
131                 .n_voltages = ARRAY_SIZE(ldo_volt_table),               \
132                 .vsel_reg       = PM800_##vreg##_VOUT,                  \
133                 .vsel_mask      = 0x1f,                                 \
134                 .enable_reg     = PM800_##ereg,                         \
135                 .enable_mask    = 1 << (ebit),                          \
136                 .volt_table     = ldo_volt_table,                       \
137         },                                                              \
138         .max_ua         = (amax),                                       \
139 }
140 
141 /* Ranges are sorted in ascending order. */
142 static const struct regulator_linear_range buck1_volt_range[] = {
143         REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
144         REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
145 };
146 
147 /* BUCK 2~5 have same ranges. */
148 static const struct regulator_linear_range buck2_5_volt_range[] = {
149         REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
150         REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
151 };
152 
153 static const unsigned int ldo1_volt_table[] = {
154         600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
155         1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
156 };
157 
158 static const unsigned int ldo2_volt_table[] = {
159         1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
160 };
161 
162 /* LDO 3~17 have same voltage table. */
163 static const unsigned int ldo3_17_volt_table[] = {
164         1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
165         2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
166 };
167 
168 /* LDO 18~19 have same voltage table. */
169 static const unsigned int ldo18_19_volt_table[] = {
170         1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
171 };
172 
173 static int pm800_get_current_limit(struct regulator_dev *rdev)
174 {
175         struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
176 
177         return info->max_ua;
178 }
179 
180 static struct regulator_ops pm800_volt_range_ops = {
181         .list_voltage = regulator_list_voltage_linear_range,
182         .map_voltage = regulator_map_voltage_linear_range,
183         .set_voltage_sel = regulator_set_voltage_sel_regmap,
184         .get_voltage_sel = regulator_get_voltage_sel_regmap,
185         .enable = regulator_enable_regmap,
186         .disable = regulator_disable_regmap,
187         .is_enabled = regulator_is_enabled_regmap,
188         .get_current_limit = pm800_get_current_limit,
189 };
190 
191 static struct regulator_ops pm800_volt_table_ops = {
192         .list_voltage = regulator_list_voltage_table,
193         .map_voltage = regulator_map_voltage_iterate,
194         .set_voltage_sel = regulator_set_voltage_sel_regmap,
195         .get_voltage_sel = regulator_get_voltage_sel_regmap,
196         .enable = regulator_enable_regmap,
197         .disable = regulator_disable_regmap,
198         .is_enabled = regulator_is_enabled_regmap,
199         .get_current_limit = pm800_get_current_limit,
200 };
201 
202 /* The array is indexed by id(PM800_ID_XXX) */
203 static struct pm800_regulator_info pm800_regulator_info[] = {
204         PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
205         PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
206         PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
207         PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
208         PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
209 
210         PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
211         PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
212         PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
213         PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
214         PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
215         PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
216         PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
217         PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
218         PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
219         PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
220         PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
221         PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
222         PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
223         PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
224         PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
225         PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
226         PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
227         PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
228         PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
229 };
230 
231 #define PM800_REGULATOR_OF_MATCH(_name, _id)                            \
232         [PM800_ID_##_id] = {                                            \
233                 .name = #_name,                                         \
234                 .driver_data = &pm800_regulator_info[PM800_ID_##_id],   \
235         }
236 
237 static struct of_regulator_match pm800_regulator_matches[] = {
238         PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
239         PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
240         PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
241         PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
242         PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
243         PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
244         PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
245         PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
246         PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
247         PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
248         PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
249         PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
250         PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
251         PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
252         PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
253         PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
254         PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
255         PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
256         PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
257         PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
258         PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
259         PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
260         PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
261         PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
262 };
263 
264 static int pm800_regulator_dt_init(struct platform_device *pdev)
265 {
266         struct device_node *np = pdev->dev.of_node;
267         int ret;
268 
269         ret = of_regulator_match(&pdev->dev, np,
270                                  pm800_regulator_matches,
271                                  ARRAY_SIZE(pm800_regulator_matches));
272         if (ret < 0)
273                 return ret;
274 
275         return 0;
276 }
277 
278 static int pm800_regulator_probe(struct platform_device *pdev)
279 {
280         struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
281         struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
282         struct pm800_regulators *pm800_data;
283         struct pm800_regulator_info *info;
284         struct regulator_config config = { };
285         struct regulator_init_data *init_data;
286         int i, ret;
287 
288         if (!pdata || pdata->num_regulators == 0) {
289                 if (IS_ENABLED(CONFIG_OF)) {
290                         ret = pm800_regulator_dt_init(pdev);
291                         if (ret)
292                                 return ret;
293                 } else {
294                         return -ENODEV;
295                 }
296         } else if (pdata->num_regulators) {
297                 unsigned int count = 0;
298 
299                 /* Check whether num_regulator is valid. */
300                 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
301                         if (pdata->regulators[i])
302                                 count++;
303                 }
304                 if (count != pdata->num_regulators)
305                         return -EINVAL;
306         } else {
307                 return -EINVAL;
308         }
309 
310         pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
311                                         GFP_KERNEL);
312         if (!pm800_data)
313                 return -ENOMEM;
314 
315         pm800_data->map = chip->subchip->regmap_power;
316         pm800_data->chip = chip;
317 
318         platform_set_drvdata(pdev, pm800_data);
319 
320         for (i = 0; i < PM800_ID_RG_MAX; i++) {
321                 if (!pdata || pdata->num_regulators == 0)
322                         init_data = pm800_regulator_matches[i].init_data;
323                 else
324                         init_data = pdata->regulators[i];
325                 if (!init_data)
326                         continue;
327                 info = pm800_regulator_matches[i].driver_data;
328                 config.dev = &pdev->dev;
329                 config.init_data = init_data;
330                 config.driver_data = info;
331                 config.regmap = pm800_data->map;
332                 config.of_node = pm800_regulator_matches[i].of_node;
333 
334                 pm800_data->regulators[i] =
335                                 regulator_register(&info->desc, &config);
336                 if (IS_ERR(pm800_data->regulators[i])) {
337                         ret = PTR_ERR(pm800_data->regulators[i]);
338                         dev_err(&pdev->dev, "Failed to register %s\n",
339                                 info->desc.name);
340 
341                         while (--i >= 0)
342                                 regulator_unregister(pm800_data->regulators[i]);
343 
344                         return ret;
345                 }
346         }
347 
348         return 0;
349 }
350 
351 static int pm800_regulator_remove(struct platform_device *pdev)
352 {
353         struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
354         int i;
355 
356         for (i = 0; i < PM800_ID_RG_MAX; i++)
357                 regulator_unregister(pm800_data->regulators[i]);
358 
359         return 0;
360 }
361 
362 static struct platform_driver pm800_regulator_driver = {
363         .driver         = {
364                 .name   = "88pm80x-regulator",
365                 .owner  = THIS_MODULE,
366         },
367         .probe          = pm800_regulator_probe,
368         .remove         = pm800_regulator_remove,
369 };
370 
371 module_platform_driver(pm800_regulator_driver);
372 
373 MODULE_LICENSE("GPL");
374 MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
375 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
376 MODULE_ALIAS("platform:88pm800-regulator");
377 

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