Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/regulator/as3722-regulator.c

  1 /*
  2  * Voltage regulator support for AMS AS3722 PMIC
  3  *
  4  * Copyright (C) 2013 ams
  5  *
  6  * Author: Florian Lobmaier <florian.lobmaier@ams.com>
  7  * Author: Laxman Dewangan <ldewangan@nvidia.com>
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License as published by
 11  * the Free Software Foundation; either version 2 of the License, or
 12  * (at your option) any later version.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  *
 19  * You should have received a copy of the GNU General Public License
 20  * along with this program; if not, write to the Free Software
 21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 22  *
 23  */
 24 
 25 #include <linux/err.h>
 26 #include <linux/kernel.h>
 27 #include <linux/module.h>
 28 #include <linux/mfd/as3722.h>
 29 #include <linux/of.h>
 30 #include <linux/of_platform.h>
 31 #include <linux/platform_device.h>
 32 #include <linux/regulator/driver.h>
 33 #include <linux/regulator/machine.h>
 34 #include <linux/regulator/of_regulator.h>
 35 #include <linux/slab.h>
 36 
 37 /* Regulator IDs */
 38 enum as3722_regulators_id {
 39         AS3722_REGULATOR_ID_SD0,
 40         AS3722_REGULATOR_ID_SD1,
 41         AS3722_REGULATOR_ID_SD2,
 42         AS3722_REGULATOR_ID_SD3,
 43         AS3722_REGULATOR_ID_SD4,
 44         AS3722_REGULATOR_ID_SD5,
 45         AS3722_REGULATOR_ID_SD6,
 46         AS3722_REGULATOR_ID_LDO0,
 47         AS3722_REGULATOR_ID_LDO1,
 48         AS3722_REGULATOR_ID_LDO2,
 49         AS3722_REGULATOR_ID_LDO3,
 50         AS3722_REGULATOR_ID_LDO4,
 51         AS3722_REGULATOR_ID_LDO5,
 52         AS3722_REGULATOR_ID_LDO6,
 53         AS3722_REGULATOR_ID_LDO7,
 54         AS3722_REGULATOR_ID_LDO9,
 55         AS3722_REGULATOR_ID_LDO10,
 56         AS3722_REGULATOR_ID_LDO11,
 57         AS3722_REGULATOR_ID_MAX,
 58 };
 59 
 60 struct as3722_register_mapping {
 61         u8 regulator_id;
 62         const char *name;
 63         const char *sname;
 64         u8 vsel_reg;
 65         u8 vsel_mask;
 66         int n_voltages;
 67         u32 enable_reg;
 68         u8 enable_mask;
 69         u32 control_reg;
 70         u8 mode_mask;
 71         u32 sleep_ctrl_reg;
 72         u8 sleep_ctrl_mask;
 73 };
 74 
 75 struct as3722_regulator_config_data {
 76         struct regulator_init_data *reg_init;
 77         bool enable_tracking;
 78         int ext_control;
 79 };
 80 
 81 struct as3722_regulators {
 82         struct device *dev;
 83         struct as3722 *as3722;
 84         struct regulator_dev *rdevs[AS3722_REGULATOR_ID_MAX];
 85         struct regulator_desc desc[AS3722_REGULATOR_ID_MAX];
 86         struct as3722_regulator_config_data
 87                         reg_config_data[AS3722_REGULATOR_ID_MAX];
 88 };
 89 
 90 static const struct as3722_register_mapping as3722_reg_lookup[] = {
 91         {
 92                 .regulator_id = AS3722_REGULATOR_ID_SD0,
 93                 .name = "as3722-sd0",
 94                 .vsel_reg = AS3722_SD0_VOLTAGE_REG,
 95                 .vsel_mask = AS3722_SD_VSEL_MASK,
 96                 .enable_reg = AS3722_SD_CONTROL_REG,
 97                 .enable_mask = AS3722_SDn_CTRL(0),
 98                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 99                 .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
100                 .control_reg = AS3722_SD0_CONTROL_REG,
101                 .mode_mask = AS3722_SD0_MODE_FAST,
102         },
103         {
104                 .regulator_id = AS3722_REGULATOR_ID_SD1,
105                 .name = "as3722-sd1",
106                 .vsel_reg = AS3722_SD1_VOLTAGE_REG,
107                 .vsel_mask = AS3722_SD_VSEL_MASK,
108                 .enable_reg = AS3722_SD_CONTROL_REG,
109                 .enable_mask = AS3722_SDn_CTRL(1),
110                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
111                 .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
112                 .control_reg = AS3722_SD1_CONTROL_REG,
113                 .mode_mask = AS3722_SD1_MODE_FAST,
114         },
115         {
116                 .regulator_id = AS3722_REGULATOR_ID_SD2,
117                 .name = "as3722-sd2",
118                 .sname = "vsup-sd2",
119                 .vsel_reg = AS3722_SD2_VOLTAGE_REG,
120                 .vsel_mask = AS3722_SD_VSEL_MASK,
121                 .enable_reg = AS3722_SD_CONTROL_REG,
122                 .enable_mask = AS3722_SDn_CTRL(2),
123                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
124                 .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
125                 .control_reg = AS3722_SD23_CONTROL_REG,
126                 .mode_mask = AS3722_SD2_MODE_FAST,
127                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
128         },
129         {
130                 .regulator_id = AS3722_REGULATOR_ID_SD3,
131                 .name = "as3722-sd3",
132                 .sname = "vsup-sd3",
133                 .vsel_reg = AS3722_SD3_VOLTAGE_REG,
134                 .vsel_mask = AS3722_SD_VSEL_MASK,
135                 .enable_reg = AS3722_SD_CONTROL_REG,
136                 .enable_mask = AS3722_SDn_CTRL(3),
137                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
138                 .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
139                 .control_reg = AS3722_SD23_CONTROL_REG,
140                 .mode_mask = AS3722_SD3_MODE_FAST,
141                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
142         },
143         {
144                 .regulator_id = AS3722_REGULATOR_ID_SD4,
145                 .name = "as3722-sd4",
146                 .sname = "vsup-sd4",
147                 .vsel_reg = AS3722_SD4_VOLTAGE_REG,
148                 .vsel_mask = AS3722_SD_VSEL_MASK,
149                 .enable_reg = AS3722_SD_CONTROL_REG,
150                 .enable_mask = AS3722_SDn_CTRL(4),
151                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
152                 .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
153                 .control_reg = AS3722_SD4_CONTROL_REG,
154                 .mode_mask = AS3722_SD4_MODE_FAST,
155                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
156         },
157         {
158                 .regulator_id = AS3722_REGULATOR_ID_SD5,
159                 .name = "as3722-sd5",
160                 .sname = "vsup-sd5",
161                 .vsel_reg = AS3722_SD5_VOLTAGE_REG,
162                 .vsel_mask = AS3722_SD_VSEL_MASK,
163                 .enable_reg = AS3722_SD_CONTROL_REG,
164                 .enable_mask = AS3722_SDn_CTRL(5),
165                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
166                 .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
167                 .control_reg = AS3722_SD5_CONTROL_REG,
168                 .mode_mask = AS3722_SD5_MODE_FAST,
169                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
170         },
171         {
172                 .regulator_id = AS3722_REGULATOR_ID_SD6,
173                 .name = "as3722-sd6",
174                 .vsel_reg = AS3722_SD6_VOLTAGE_REG,
175                 .vsel_mask = AS3722_SD_VSEL_MASK,
176                 .enable_reg = AS3722_SD_CONTROL_REG,
177                 .enable_mask = AS3722_SDn_CTRL(6),
178                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
179                 .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
180                 .control_reg = AS3722_SD6_CONTROL_REG,
181                 .mode_mask = AS3722_SD6_MODE_FAST,
182         },
183         {
184                 .regulator_id = AS3722_REGULATOR_ID_LDO0,
185                 .name = "as3722-ldo0",
186                 .sname = "vin-ldo0",
187                 .vsel_reg = AS3722_LDO0_VOLTAGE_REG,
188                 .vsel_mask = AS3722_LDO0_VSEL_MASK,
189                 .enable_reg = AS3722_LDOCONTROL0_REG,
190                 .enable_mask = AS3722_LDO0_CTRL,
191                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
192                 .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
193                 .n_voltages = AS3722_LDO0_NUM_VOLT,
194         },
195         {
196                 .regulator_id = AS3722_REGULATOR_ID_LDO1,
197                 .name = "as3722-ldo1",
198                 .sname = "vin-ldo1-6",
199                 .vsel_reg = AS3722_LDO1_VOLTAGE_REG,
200                 .vsel_mask = AS3722_LDO_VSEL_MASK,
201                 .enable_reg = AS3722_LDOCONTROL0_REG,
202                 .enable_mask = AS3722_LDO1_CTRL,
203                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
204                 .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
205                 .n_voltages = AS3722_LDO_NUM_VOLT,
206         },
207         {
208                 .regulator_id = AS3722_REGULATOR_ID_LDO2,
209                 .name = "as3722-ldo2",
210                 .sname = "vin-ldo2-5-7",
211                 .vsel_reg = AS3722_LDO2_VOLTAGE_REG,
212                 .vsel_mask = AS3722_LDO_VSEL_MASK,
213                 .enable_reg = AS3722_LDOCONTROL0_REG,
214                 .enable_mask = AS3722_LDO2_CTRL,
215                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
216                 .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
217                 .n_voltages = AS3722_LDO_NUM_VOLT,
218         },
219         {
220                 .regulator_id = AS3722_REGULATOR_ID_LDO3,
221                 .name = "as3722-ldo3",
222                 .name = "vin-ldo3-4",
223                 .vsel_reg = AS3722_LDO3_VOLTAGE_REG,
224                 .vsel_mask = AS3722_LDO3_VSEL_MASK,
225                 .enable_reg = AS3722_LDOCONTROL0_REG,
226                 .enable_mask = AS3722_LDO3_CTRL,
227                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
228                 .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
229                 .n_voltages = AS3722_LDO3_NUM_VOLT,
230         },
231         {
232                 .regulator_id = AS3722_REGULATOR_ID_LDO4,
233                 .name = "as3722-ldo4",
234                 .name = "vin-ldo3-4",
235                 .vsel_reg = AS3722_LDO4_VOLTAGE_REG,
236                 .vsel_mask = AS3722_LDO_VSEL_MASK,
237                 .enable_reg = AS3722_LDOCONTROL0_REG,
238                 .enable_mask = AS3722_LDO4_CTRL,
239                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
240                 .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
241                 .n_voltages = AS3722_LDO_NUM_VOLT,
242         },
243         {
244                 .regulator_id = AS3722_REGULATOR_ID_LDO5,
245                 .name = "as3722-ldo5",
246                 .sname = "vin-ldo2-5-7",
247                 .vsel_reg = AS3722_LDO5_VOLTAGE_REG,
248                 .vsel_mask = AS3722_LDO_VSEL_MASK,
249                 .enable_reg = AS3722_LDOCONTROL0_REG,
250                 .enable_mask = AS3722_LDO5_CTRL,
251                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
252                 .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
253                 .n_voltages = AS3722_LDO_NUM_VOLT,
254         },
255         {
256                 .regulator_id = AS3722_REGULATOR_ID_LDO6,
257                 .name = "as3722-ldo6",
258                 .sname = "vin-ldo1-6",
259                 .vsel_reg = AS3722_LDO6_VOLTAGE_REG,
260                 .vsel_mask = AS3722_LDO_VSEL_MASK,
261                 .enable_reg = AS3722_LDOCONTROL0_REG,
262                 .enable_mask = AS3722_LDO6_CTRL,
263                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
264                 .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
265                 .n_voltages = AS3722_LDO_NUM_VOLT,
266         },
267         {
268                 .regulator_id = AS3722_REGULATOR_ID_LDO7,
269                 .name = "as3722-ldo7",
270                 .sname = "vin-ldo2-5-7",
271                 .vsel_reg = AS3722_LDO7_VOLTAGE_REG,
272                 .vsel_mask = AS3722_LDO_VSEL_MASK,
273                 .enable_reg = AS3722_LDOCONTROL0_REG,
274                 .enable_mask = AS3722_LDO7_CTRL,
275                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
276                 .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
277                 .n_voltages = AS3722_LDO_NUM_VOLT,
278         },
279         {
280                 .regulator_id = AS3722_REGULATOR_ID_LDO9,
281                 .name = "as3722-ldo9",
282                 .sname = "vin-ldo9-10",
283                 .vsel_reg = AS3722_LDO9_VOLTAGE_REG,
284                 .vsel_mask = AS3722_LDO_VSEL_MASK,
285                 .enable_reg = AS3722_LDOCONTROL1_REG,
286                 .enable_mask = AS3722_LDO9_CTRL,
287                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
288                 .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
289                 .n_voltages = AS3722_LDO_NUM_VOLT,
290         },
291         {
292                 .regulator_id = AS3722_REGULATOR_ID_LDO10,
293                 .name = "as3722-ldo10",
294                 .sname = "vin-ldo9-10",
295                 .vsel_reg = AS3722_LDO10_VOLTAGE_REG,
296                 .vsel_mask = AS3722_LDO_VSEL_MASK,
297                 .enable_reg = AS3722_LDOCONTROL1_REG,
298                 .enable_mask = AS3722_LDO10_CTRL,
299                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
300                 .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
301                 .n_voltages = AS3722_LDO_NUM_VOLT,
302         },
303         {
304                 .regulator_id = AS3722_REGULATOR_ID_LDO11,
305                 .name = "as3722-ldo11",
306                 .sname = "vin-ldo11",
307                 .vsel_reg = AS3722_LDO11_VOLTAGE_REG,
308                 .vsel_mask = AS3722_LDO_VSEL_MASK,
309                 .enable_reg = AS3722_LDOCONTROL1_REG,
310                 .enable_mask = AS3722_LDO11_CTRL,
311                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
312                 .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
313                 .n_voltages = AS3722_LDO_NUM_VOLT,
314         },
315 };
316 
317 
318 static const int as3722_ldo_current[] = { 150000, 300000 };
319 static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 };
320 
321 static int as3722_current_to_index(int min_uA, int max_uA,
322                 const int *curr_table, int n_currents)
323 {
324         int i;
325 
326         for (i = n_currents - 1; i >= 0; i--) {
327                 if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA))
328                         return i;
329         }
330         return -EINVAL;
331 }
332 
333 static int as3722_ldo_get_current_limit(struct regulator_dev *rdev)
334 {
335         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
336         struct as3722 *as3722 = as3722_regs->as3722;
337         int id = rdev_get_id(rdev);
338         u32 val;
339         int ret;
340 
341         ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val);
342         if (ret < 0) {
343                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
344                         as3722_reg_lookup[id].vsel_reg, ret);
345                 return ret;
346         }
347         if (val & AS3722_LDO_ILIMIT_MASK)
348                 return 300000;
349         return 150000;
350 }
351 
352 static int as3722_ldo_set_current_limit(struct regulator_dev *rdev,
353                 int min_uA, int max_uA)
354 {
355         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
356         struct as3722 *as3722 = as3722_regs->as3722;
357         int id = rdev_get_id(rdev);
358         int ret;
359         u32 reg = 0;
360 
361         ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current,
362                                 ARRAY_SIZE(as3722_ldo_current));
363         if (ret < 0) {
364                 dev_err(as3722_regs->dev,
365                         "Current range min:max = %d:%d does not support\n",
366                         min_uA, max_uA);
367                 return ret;
368         }
369         if (ret)
370                 reg = AS3722_LDO_ILIMIT_BIT;
371         return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg,
372                         AS3722_LDO_ILIMIT_MASK, reg);
373 }
374 
375 static struct regulator_ops as3722_ldo0_ops = {
376         .is_enabled = regulator_is_enabled_regmap,
377         .enable = regulator_enable_regmap,
378         .disable = regulator_disable_regmap,
379         .list_voltage = regulator_list_voltage_linear,
380         .get_voltage_sel = regulator_get_voltage_sel_regmap,
381         .set_voltage_sel = regulator_set_voltage_sel_regmap,
382         .get_current_limit = as3722_ldo_get_current_limit,
383         .set_current_limit = as3722_ldo_set_current_limit,
384 };
385 
386 static struct regulator_ops as3722_ldo0_extcntrl_ops = {
387         .list_voltage = regulator_list_voltage_linear,
388         .get_voltage_sel = regulator_get_voltage_sel_regmap,
389         .set_voltage_sel = regulator_set_voltage_sel_regmap,
390         .get_current_limit = as3722_ldo_get_current_limit,
391         .set_current_limit = as3722_ldo_set_current_limit,
392 };
393 
394 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
395                 int id, u8 mode)
396 {
397         struct as3722 *as3722 = as3722_reg->as3722;
398 
399         switch (mode) {
400         case AS3722_LDO3_MODE_PMOS:
401         case AS3722_LDO3_MODE_PMOS_TRACKING:
402         case AS3722_LDO3_MODE_NMOS:
403         case AS3722_LDO3_MODE_SWITCH:
404                 return as3722_update_bits(as3722,
405                         as3722_reg_lookup[id].vsel_reg,
406                         AS3722_LDO3_MODE_MASK, mode);
407 
408         default:
409                 return -EINVAL;
410         }
411 }
412 
413 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
414 {
415         return 150000;
416 }
417 
418 static struct regulator_ops as3722_ldo3_ops = {
419         .is_enabled = regulator_is_enabled_regmap,
420         .enable = regulator_enable_regmap,
421         .disable = regulator_disable_regmap,
422         .list_voltage = regulator_list_voltage_linear,
423         .get_voltage_sel = regulator_get_voltage_sel_regmap,
424         .set_voltage_sel = regulator_set_voltage_sel_regmap,
425         .get_current_limit = as3722_ldo3_get_current_limit,
426 };
427 
428 static struct regulator_ops as3722_ldo3_extcntrl_ops = {
429         .list_voltage = regulator_list_voltage_linear,
430         .get_voltage_sel = regulator_get_voltage_sel_regmap,
431         .set_voltage_sel = regulator_set_voltage_sel_regmap,
432         .get_current_limit = as3722_ldo3_get_current_limit,
433 };
434 
435 static const struct regulator_linear_range as3722_ldo_ranges[] = {
436         REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
437         REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
438 };
439 
440 static struct regulator_ops as3722_ldo_ops = {
441         .is_enabled = regulator_is_enabled_regmap,
442         .enable = regulator_enable_regmap,
443         .disable = regulator_disable_regmap,
444         .map_voltage = regulator_map_voltage_linear_range,
445         .set_voltage_sel = regulator_set_voltage_sel_regmap,
446         .get_voltage_sel = regulator_get_voltage_sel_regmap,
447         .list_voltage = regulator_list_voltage_linear_range,
448         .get_current_limit = as3722_ldo_get_current_limit,
449         .set_current_limit = as3722_ldo_set_current_limit,
450 };
451 
452 static struct regulator_ops as3722_ldo_extcntrl_ops = {
453         .map_voltage = regulator_map_voltage_linear_range,
454         .set_voltage_sel = regulator_set_voltage_sel_regmap,
455         .get_voltage_sel = regulator_get_voltage_sel_regmap,
456         .list_voltage = regulator_list_voltage_linear_range,
457         .get_current_limit = as3722_ldo_get_current_limit,
458         .set_current_limit = as3722_ldo_set_current_limit,
459 };
460 
461 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
462 {
463         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
464         struct as3722 *as3722 = as3722_regs->as3722;
465         int id = rdev_get_id(rdev);
466         u32 val;
467         int ret;
468 
469         if (!as3722_reg_lookup[id].control_reg)
470                 return -ENOTSUPP;
471 
472         ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
473         if (ret < 0) {
474                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
475                         as3722_reg_lookup[id].control_reg, ret);
476                 return ret;
477         }
478 
479         if (val & as3722_reg_lookup[id].mode_mask)
480                 return REGULATOR_MODE_FAST;
481         else
482                 return REGULATOR_MODE_NORMAL;
483 }
484 
485 static int as3722_sd_set_mode(struct regulator_dev *rdev,
486                 unsigned int mode)
487 {
488         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
489         struct as3722 *as3722 = as3722_regs->as3722;
490         u8 id = rdev_get_id(rdev);
491         u8 val = 0;
492         int ret;
493 
494         if (!as3722_reg_lookup[id].control_reg)
495                 return -ERANGE;
496 
497         switch (mode) {
498         case REGULATOR_MODE_FAST:
499                 val = as3722_reg_lookup[id].mode_mask;
500         case REGULATOR_MODE_NORMAL: /* fall down */
501                 break;
502         default:
503                 return -EINVAL;
504         }
505 
506         ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
507                         as3722_reg_lookup[id].mode_mask, val);
508         if (ret < 0) {
509                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
510                         as3722_reg_lookup[id].control_reg, ret);
511                 return ret;
512         }
513         return ret;
514 }
515 
516 static int as3722_sd016_get_current_limit(struct regulator_dev *rdev)
517 {
518         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
519         struct as3722 *as3722 = as3722_regs->as3722;
520         int id = rdev_get_id(rdev);
521         u32 val, reg;
522         int mask;
523         int ret;
524 
525         switch (id) {
526         case AS3722_REGULATOR_ID_SD0:
527                 reg = AS3722_OVCURRENT_REG;
528                 mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
529                 break;
530         case AS3722_REGULATOR_ID_SD1:
531                 reg = AS3722_OVCURRENT_REG;
532                 mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
533                 break;
534         case AS3722_REGULATOR_ID_SD6:
535                 reg = AS3722_OVCURRENT_DEB_REG;
536                 mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
537                 break;
538         default:
539                 return -EINVAL;
540         }
541         ret = as3722_read(as3722, reg, &val);
542         if (ret < 0) {
543                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
544                         reg, ret);
545                 return ret;
546         }
547         val &= mask;
548         val >>= ffs(mask) - 1;
549         if (val == 3)
550                 return -EINVAL;
551         return as3722_sd016_current[val];
552 }
553 
554 static int as3722_sd016_set_current_limit(struct regulator_dev *rdev,
555                 int min_uA, int max_uA)
556 {
557         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
558         struct as3722 *as3722 = as3722_regs->as3722;
559         int id = rdev_get_id(rdev);
560         int ret;
561         int val;
562         int mask;
563         u32 reg;
564 
565         ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current,
566                                 ARRAY_SIZE(as3722_sd016_current));
567         if (ret < 0) {
568                 dev_err(as3722_regs->dev,
569                         "Current range min:max = %d:%d does not support\n",
570                         min_uA, max_uA);
571                 return ret;
572         }
573 
574         switch (id) {
575         case AS3722_REGULATOR_ID_SD0:
576                 reg = AS3722_OVCURRENT_REG;
577                 mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
578                 break;
579         case AS3722_REGULATOR_ID_SD1:
580                 reg = AS3722_OVCURRENT_REG;
581                 mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
582                 break;
583         case AS3722_REGULATOR_ID_SD6:
584                 reg = AS3722_OVCURRENT_DEB_REG;
585                 mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
586                 break;
587         default:
588                 return -EINVAL;
589         }
590         ret <<= ffs(mask) - 1;
591         val = ret & mask;
592         return as3722_update_bits(as3722, reg, mask, val);
593 }
594 
595 static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs)
596 {
597         int err;
598         unsigned val;
599 
600         err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val);
601         if (err < 0) {
602                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
603                         AS3722_FUSE7_REG, err);
604                 return false;
605         }
606         if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE)
607                 return true;
608         return false;
609 }
610 
611 static const struct regulator_linear_range as3722_sd2345_ranges[] = {
612         REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
613         REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
614         REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
615 };
616 
617 static struct regulator_ops as3722_sd016_ops = {
618         .is_enabled = regulator_is_enabled_regmap,
619         .enable = regulator_enable_regmap,
620         .disable = regulator_disable_regmap,
621         .list_voltage = regulator_list_voltage_linear,
622         .map_voltage = regulator_map_voltage_linear,
623         .get_voltage_sel = regulator_get_voltage_sel_regmap,
624         .set_voltage_sel = regulator_set_voltage_sel_regmap,
625         .get_current_limit = as3722_sd016_get_current_limit,
626         .set_current_limit = as3722_sd016_set_current_limit,
627         .get_mode = as3722_sd_get_mode,
628         .set_mode = as3722_sd_set_mode,
629 };
630 
631 static struct regulator_ops as3722_sd016_extcntrl_ops = {
632         .list_voltage = regulator_list_voltage_linear,
633         .map_voltage = regulator_map_voltage_linear,
634         .get_voltage_sel = regulator_get_voltage_sel_regmap,
635         .set_voltage_sel = regulator_set_voltage_sel_regmap,
636         .get_current_limit = as3722_sd016_get_current_limit,
637         .set_current_limit = as3722_sd016_set_current_limit,
638         .get_mode = as3722_sd_get_mode,
639         .set_mode = as3722_sd_set_mode,
640 };
641 
642 static struct regulator_ops as3722_sd2345_ops = {
643         .is_enabled = regulator_is_enabled_regmap,
644         .enable = regulator_enable_regmap,
645         .disable = regulator_disable_regmap,
646         .list_voltage = regulator_list_voltage_linear_range,
647         .map_voltage = regulator_map_voltage_linear_range,
648         .set_voltage_sel = regulator_set_voltage_sel_regmap,
649         .get_voltage_sel = regulator_get_voltage_sel_regmap,
650         .get_mode = as3722_sd_get_mode,
651         .set_mode = as3722_sd_set_mode,
652 };
653 
654 static struct regulator_ops as3722_sd2345_extcntrl_ops = {
655         .list_voltage = regulator_list_voltage_linear_range,
656         .map_voltage = regulator_map_voltage_linear_range,
657         .set_voltage_sel = regulator_set_voltage_sel_regmap,
658         .get_voltage_sel = regulator_get_voltage_sel_regmap,
659         .get_mode = as3722_sd_get_mode,
660         .set_mode = as3722_sd_set_mode,
661 };
662 
663 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
664                 int ext_pwr_ctrl)
665 {
666         int ret;
667         unsigned int val;
668 
669         if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
670                 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
671                 return -EINVAL;
672 
673         val =  ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
674         ret = as3722_update_bits(as3722_regs->as3722,
675                         as3722_reg_lookup[id].sleep_ctrl_reg,
676                         as3722_reg_lookup[id].sleep_ctrl_mask, val);
677         if (ret < 0)
678                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
679                         as3722_reg_lookup[id].sleep_ctrl_reg, ret);
680         return ret;
681 }
682 
683 static struct of_regulator_match as3722_regulator_matches[] = {
684         { .name = "sd0", },
685         { .name = "sd1", },
686         { .name = "sd2", },
687         { .name = "sd3", },
688         { .name = "sd4", },
689         { .name = "sd5", },
690         { .name = "sd6", },
691         { .name = "ldo0", },
692         { .name = "ldo1", },
693         { .name = "ldo2", },
694         { .name = "ldo3", },
695         { .name = "ldo4", },
696         { .name = "ldo5", },
697         { .name = "ldo6", },
698         { .name = "ldo7", },
699         { .name = "ldo9", },
700         { .name = "ldo10", },
701         { .name = "ldo11", },
702 };
703 
704 static int as3722_get_regulator_dt_data(struct platform_device *pdev,
705                 struct as3722_regulators *as3722_regs)
706 {
707         struct device_node *np;
708         struct as3722_regulator_config_data *reg_config;
709         u32 prop;
710         int id;
711         int ret;
712 
713         np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
714         if (!np) {
715                 dev_err(&pdev->dev, "Device is not having regulators node\n");
716                 return -ENODEV;
717         }
718         pdev->dev.of_node = np;
719 
720         ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
721                         ARRAY_SIZE(as3722_regulator_matches));
722         of_node_put(np);
723         if (ret < 0) {
724                 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
725                         ret);
726                 return ret;
727         }
728 
729         for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
730                 struct device_node *reg_node;
731 
732                 reg_config = &as3722_regs->reg_config_data[id];
733                 reg_config->reg_init = as3722_regulator_matches[id].init_data;
734                 reg_node = as3722_regulator_matches[id].of_node;
735 
736                 if (!reg_config->reg_init || !reg_node)
737                         continue;
738 
739                 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
740                 if (!ret) {
741                         if (prop < 3)
742                                 reg_config->ext_control = prop;
743                         else
744                                 dev_warn(&pdev->dev,
745                                         "ext-control have invalid option: %u\n",
746                                         prop);
747                 }
748                 reg_config->enable_tracking =
749                         of_property_read_bool(reg_node, "ams,enable-tracking");
750         }
751         return 0;
752 }
753 
754 static int as3722_regulator_probe(struct platform_device *pdev)
755 {
756         struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
757         struct as3722_regulators *as3722_regs;
758         struct as3722_regulator_config_data *reg_config;
759         struct regulator_dev *rdev;
760         struct regulator_config config = { };
761         struct regulator_ops *ops;
762         int id;
763         int ret;
764 
765         as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
766                                 GFP_KERNEL);
767         if (!as3722_regs)
768                 return -ENOMEM;
769 
770         as3722_regs->dev = &pdev->dev;
771         as3722_regs->as3722 = as3722;
772         platform_set_drvdata(pdev, as3722_regs);
773 
774         ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
775         if (ret < 0)
776                 return ret;
777 
778         config.dev = &pdev->dev;
779         config.driver_data = as3722_regs;
780         config.regmap = as3722->regmap;
781 
782         for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
783                 reg_config = &as3722_regs->reg_config_data[id];
784 
785                 as3722_regs->desc[id].name = as3722_reg_lookup[id].name;
786                 as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname;
787                 as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id;
788                 as3722_regs->desc[id].n_voltages =
789                                         as3722_reg_lookup[id].n_voltages;
790                 as3722_regs->desc[id].type = REGULATOR_VOLTAGE;
791                 as3722_regs->desc[id].owner = THIS_MODULE;
792                 as3722_regs->desc[id].enable_reg =
793                                         as3722_reg_lookup[id].enable_reg;
794                 as3722_regs->desc[id].enable_mask =
795                                         as3722_reg_lookup[id].enable_mask;
796                 as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg;
797                 as3722_regs->desc[id].vsel_mask =
798                                         as3722_reg_lookup[id].vsel_mask;
799                 switch (id) {
800                 case AS3722_REGULATOR_ID_LDO0:
801                         if (reg_config->ext_control)
802                                 ops = &as3722_ldo0_extcntrl_ops;
803                         else
804                                 ops = &as3722_ldo0_ops;
805                         as3722_regs->desc[id].min_uV = 825000;
806                         as3722_regs->desc[id].uV_step = 25000;
807                         as3722_regs->desc[id].linear_min_sel = 1;
808                         as3722_regs->desc[id].enable_time = 500;
809                         break;
810                 case AS3722_REGULATOR_ID_LDO3:
811                         if (reg_config->ext_control)
812                                 ops = &as3722_ldo3_extcntrl_ops;
813                         else
814                                 ops = &as3722_ldo3_ops;
815                         as3722_regs->desc[id].min_uV = 620000;
816                         as3722_regs->desc[id].uV_step = 20000;
817                         as3722_regs->desc[id].linear_min_sel = 1;
818                         as3722_regs->desc[id].enable_time = 500;
819                         if (reg_config->enable_tracking) {
820                                 ret = as3722_ldo3_set_tracking_mode(as3722_regs,
821                                         id, AS3722_LDO3_MODE_PMOS_TRACKING);
822                                 if (ret < 0) {
823                                         dev_err(&pdev->dev,
824                                                 "LDO3 tracking failed: %d\n",
825                                                 ret);
826                                         return ret;
827                                 }
828                         }
829                         break;
830                 case AS3722_REGULATOR_ID_SD0:
831                 case AS3722_REGULATOR_ID_SD1:
832                 case AS3722_REGULATOR_ID_SD6:
833                         if (reg_config->ext_control)
834                                 ops = &as3722_sd016_extcntrl_ops;
835                         else
836                                 ops = &as3722_sd016_ops;
837                         if (id == AS3722_REGULATOR_ID_SD0 &&
838                             as3722_sd0_is_low_voltage(as3722_regs)) {
839                                 as3722_regs->desc[id].n_voltages =
840                                         AS3722_SD0_VSEL_LOW_VOL_MAX + 1;
841                                 as3722_regs->desc[id].min_uV = 410000;
842                         } else {
843                                 as3722_regs->desc[id].n_voltages =
844                                         AS3722_SD0_VSEL_MAX + 1,
845                                 as3722_regs->desc[id].min_uV = 610000;
846                         }
847                         as3722_regs->desc[id].uV_step = 10000;
848                         as3722_regs->desc[id].linear_min_sel = 1;
849                         as3722_regs->desc[id].enable_time = 600;
850                         break;
851                 case AS3722_REGULATOR_ID_SD2:
852                 case AS3722_REGULATOR_ID_SD3:
853                 case AS3722_REGULATOR_ID_SD4:
854                 case AS3722_REGULATOR_ID_SD5:
855                         if (reg_config->ext_control)
856                                 ops = &as3722_sd2345_extcntrl_ops;
857                         else
858                                 ops = &as3722_sd2345_ops;
859                         as3722_regs->desc[id].linear_ranges =
860                                                 as3722_sd2345_ranges;
861                         as3722_regs->desc[id].n_linear_ranges =
862                                         ARRAY_SIZE(as3722_sd2345_ranges);
863                         break;
864                 default:
865                         if (reg_config->ext_control)
866                                 ops = &as3722_ldo_extcntrl_ops;
867                         else
868                                 ops = &as3722_ldo_ops;
869                         as3722_regs->desc[id].enable_time = 500;
870                         as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges;
871                         as3722_regs->desc[id].n_linear_ranges =
872                                                 ARRAY_SIZE(as3722_ldo_ranges);
873                         break;
874                 }
875                 as3722_regs->desc[id].ops = ops;
876                 config.init_data = reg_config->reg_init;
877                 config.of_node = as3722_regulator_matches[id].of_node;
878                 rdev = devm_regulator_register(&pdev->dev,
879                                         &as3722_regs->desc[id], &config);
880                 if (IS_ERR(rdev)) {
881                         ret = PTR_ERR(rdev);
882                         dev_err(&pdev->dev, "regulator %d register failed %d\n",
883                                 id, ret);
884                         return ret;
885                 }
886 
887                 as3722_regs->rdevs[id] = rdev;
888                 if (reg_config->ext_control) {
889                         ret = regulator_enable_regmap(rdev);
890                         if (ret < 0) {
891                                 dev_err(&pdev->dev,
892                                         "Regulator %d enable failed: %d\n",
893                                         id, ret);
894                                 return ret;
895                         }
896                         ret = as3722_extreg_init(as3722_regs, id,
897                                         reg_config->ext_control);
898                         if (ret < 0) {
899                                 dev_err(&pdev->dev,
900                                         "AS3722 ext control failed: %d", ret);
901                                 return ret;
902                         }
903                 }
904         }
905         return 0;
906 }
907 
908 static const struct of_device_id of_as3722_regulator_match[] = {
909         { .compatible = "ams,as3722-regulator", },
910         {},
911 };
912 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
913 
914 static struct platform_driver as3722_regulator_driver = {
915         .driver = {
916                 .name = "as3722-regulator",
917                 .owner = THIS_MODULE,
918                 .of_match_table = of_as3722_regulator_match,
919         },
920         .probe = as3722_regulator_probe,
921 };
922 
923 module_platform_driver(as3722_regulator_driver);
924 
925 MODULE_ALIAS("platform:as3722-regulator");
926 MODULE_DESCRIPTION("AS3722 regulator driver");
927 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
928 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
929 MODULE_LICENSE("GPL");
930 

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