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debugfs: Export bool read/write functions
[deliverable/linux.git] / drivers / regulator / qcom_spmi-regulator.c
1 /*
2 * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14 #include <linux/module.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/kernel.h>
18 #include <linux/interrupt.h>
19 #include <linux/bitops.h>
20 #include <linux/slab.h>
21 #include <linux/of.h>
22 #include <linux/of_device.h>
23 #include <linux/platform_device.h>
24 #include <linux/ktime.h>
25 #include <linux/regulator/driver.h>
26 #include <linux/regmap.h>
27 #include <linux/list.h>
28
29 /* These types correspond to unique register layouts. */
30 enum spmi_regulator_logical_type {
31 SPMI_REGULATOR_LOGICAL_TYPE_SMPS,
32 SPMI_REGULATOR_LOGICAL_TYPE_LDO,
33 SPMI_REGULATOR_LOGICAL_TYPE_VS,
34 SPMI_REGULATOR_LOGICAL_TYPE_BOOST,
35 SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS,
36 SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP,
37 SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO,
38 SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
39 SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
40 SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
41 };
42
43 enum spmi_regulator_type {
44 SPMI_REGULATOR_TYPE_BUCK = 0x03,
45 SPMI_REGULATOR_TYPE_LDO = 0x04,
46 SPMI_REGULATOR_TYPE_VS = 0x05,
47 SPMI_REGULATOR_TYPE_BOOST = 0x1b,
48 SPMI_REGULATOR_TYPE_FTS = 0x1c,
49 SPMI_REGULATOR_TYPE_BOOST_BYP = 0x1f,
50 SPMI_REGULATOR_TYPE_ULT_LDO = 0x21,
51 SPMI_REGULATOR_TYPE_ULT_BUCK = 0x22,
52 };
53
54 enum spmi_regulator_subtype {
55 SPMI_REGULATOR_SUBTYPE_GP_CTL = 0x08,
56 SPMI_REGULATOR_SUBTYPE_RF_CTL = 0x09,
57 SPMI_REGULATOR_SUBTYPE_N50 = 0x01,
58 SPMI_REGULATOR_SUBTYPE_N150 = 0x02,
59 SPMI_REGULATOR_SUBTYPE_N300 = 0x03,
60 SPMI_REGULATOR_SUBTYPE_N600 = 0x04,
61 SPMI_REGULATOR_SUBTYPE_N1200 = 0x05,
62 SPMI_REGULATOR_SUBTYPE_N600_ST = 0x06,
63 SPMI_REGULATOR_SUBTYPE_N1200_ST = 0x07,
64 SPMI_REGULATOR_SUBTYPE_N900_ST = 0x14,
65 SPMI_REGULATOR_SUBTYPE_N300_ST = 0x15,
66 SPMI_REGULATOR_SUBTYPE_P50 = 0x08,
67 SPMI_REGULATOR_SUBTYPE_P150 = 0x09,
68 SPMI_REGULATOR_SUBTYPE_P300 = 0x0a,
69 SPMI_REGULATOR_SUBTYPE_P600 = 0x0b,
70 SPMI_REGULATOR_SUBTYPE_P1200 = 0x0c,
71 SPMI_REGULATOR_SUBTYPE_LN = 0x10,
72 SPMI_REGULATOR_SUBTYPE_LV_P50 = 0x28,
73 SPMI_REGULATOR_SUBTYPE_LV_P150 = 0x29,
74 SPMI_REGULATOR_SUBTYPE_LV_P300 = 0x2a,
75 SPMI_REGULATOR_SUBTYPE_LV_P600 = 0x2b,
76 SPMI_REGULATOR_SUBTYPE_LV_P1200 = 0x2c,
77 SPMI_REGULATOR_SUBTYPE_LV_P450 = 0x2d,
78 SPMI_REGULATOR_SUBTYPE_LV100 = 0x01,
79 SPMI_REGULATOR_SUBTYPE_LV300 = 0x02,
80 SPMI_REGULATOR_SUBTYPE_MV300 = 0x08,
81 SPMI_REGULATOR_SUBTYPE_MV500 = 0x09,
82 SPMI_REGULATOR_SUBTYPE_HDMI = 0x10,
83 SPMI_REGULATOR_SUBTYPE_OTG = 0x11,
84 SPMI_REGULATOR_SUBTYPE_5V_BOOST = 0x01,
85 SPMI_REGULATOR_SUBTYPE_FTS_CTL = 0x08,
86 SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL = 0x09,
87 SPMI_REGULATOR_SUBTYPE_BB_2A = 0x01,
88 SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1 = 0x0d,
89 SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2 = 0x0e,
90 SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3 = 0x0f,
91 SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4 = 0x10,
92 };
93
94 enum spmi_common_regulator_registers {
95 SPMI_COMMON_REG_DIG_MAJOR_REV = 0x01,
96 SPMI_COMMON_REG_TYPE = 0x04,
97 SPMI_COMMON_REG_SUBTYPE = 0x05,
98 SPMI_COMMON_REG_VOLTAGE_RANGE = 0x40,
99 SPMI_COMMON_REG_VOLTAGE_SET = 0x41,
100 SPMI_COMMON_REG_MODE = 0x45,
101 SPMI_COMMON_REG_ENABLE = 0x46,
102 SPMI_COMMON_REG_PULL_DOWN = 0x48,
103 SPMI_COMMON_REG_SOFT_START = 0x4c,
104 SPMI_COMMON_REG_STEP_CTRL = 0x61,
105 };
106
107 enum spmi_vs_registers {
108 SPMI_VS_REG_OCP = 0x4a,
109 SPMI_VS_REG_SOFT_START = 0x4c,
110 };
111
112 enum spmi_boost_registers {
113 SPMI_BOOST_REG_CURRENT_LIMIT = 0x4a,
114 };
115
116 enum spmi_boost_byp_registers {
117 SPMI_BOOST_BYP_REG_CURRENT_LIMIT = 0x4b,
118 };
119
120 /* Used for indexing into ctrl_reg. These are offets from 0x40 */
121 enum spmi_common_control_register_index {
122 SPMI_COMMON_IDX_VOLTAGE_RANGE = 0,
123 SPMI_COMMON_IDX_VOLTAGE_SET = 1,
124 SPMI_COMMON_IDX_MODE = 5,
125 SPMI_COMMON_IDX_ENABLE = 6,
126 };
127
128 /* Common regulator control register layout */
129 #define SPMI_COMMON_ENABLE_MASK 0x80
130 #define SPMI_COMMON_ENABLE 0x80
131 #define SPMI_COMMON_DISABLE 0x00
132 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK 0x08
133 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK 0x04
134 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK 0x02
135 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK 0x01
136 #define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK 0x0f
137
138 /* Common regulator mode register layout */
139 #define SPMI_COMMON_MODE_HPM_MASK 0x80
140 #define SPMI_COMMON_MODE_AUTO_MASK 0x40
141 #define SPMI_COMMON_MODE_BYPASS_MASK 0x20
142 #define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK 0x10
143 #define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK 0x08
144 #define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK 0x04
145 #define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK 0x02
146 #define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK 0x01
147 #define SPMI_COMMON_MODE_FOLLOW_ALL_MASK 0x1f
148
149 /* Common regulator pull down control register layout */
150 #define SPMI_COMMON_PULL_DOWN_ENABLE_MASK 0x80
151
152 /* LDO regulator current limit control register layout */
153 #define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK 0x80
154
155 /* LDO regulator soft start control register layout */
156 #define SPMI_LDO_SOFT_START_ENABLE_MASK 0x80
157
158 /* VS regulator over current protection control register layout */
159 #define SPMI_VS_OCP_OVERRIDE 0x01
160 #define SPMI_VS_OCP_NO_OVERRIDE 0x00
161
162 /* VS regulator soft start control register layout */
163 #define SPMI_VS_SOFT_START_ENABLE_MASK 0x80
164 #define SPMI_VS_SOFT_START_SEL_MASK 0x03
165
166 /* Boost regulator current limit control register layout */
167 #define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK 0x80
168 #define SPMI_BOOST_CURRENT_LIMIT_MASK 0x07
169
170 #define SPMI_VS_OCP_DEFAULT_MAX_RETRIES 10
171 #define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS 30
172 #define SPMI_VS_OCP_FALL_DELAY_US 90
173 #define SPMI_VS_OCP_FAULT_DELAY_US 20000
174
175 #define SPMI_FTSMPS_STEP_CTRL_STEP_MASK 0x18
176 #define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT 3
177 #define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK 0x07
178 #define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT 0
179
180 /* Clock rate in kHz of the FTSMPS regulator reference clock. */
181 #define SPMI_FTSMPS_CLOCK_RATE 19200
182
183 /* Minimum voltage stepper delay for each step. */
184 #define SPMI_FTSMPS_STEP_DELAY 8
185
186 /*
187 * The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to
188 * adjust the step rate in order to account for oscillator variance.
189 */
190 #define SPMI_FTSMPS_STEP_MARGIN_NUM 4
191 #define SPMI_FTSMPS_STEP_MARGIN_DEN 5
192
193 /*
194 * This voltage in uV is returned by get_voltage functions when there is no way
195 * to determine the current voltage level. It is needed because the regulator
196 * framework treats a 0 uV voltage as an error.
197 */
198 #define VOLTAGE_UNKNOWN 1
199
200 /* VSET value to decide the range of ULT SMPS */
201 #define ULT_SMPS_RANGE_SPLIT 0x60
202
203 /**
204 * struct spmi_voltage_range - regulator set point voltage mapping description
205 * @min_uV: Minimum programmable output voltage resulting from
206 * set point register value 0x00
207 * @max_uV: Maximum programmable output voltage
208 * @step_uV: Output voltage increase resulting from the set point
209 * register value increasing by 1
210 * @set_point_min_uV: Minimum allowed voltage
211 * @set_point_max_uV: Maximum allowed voltage. This may be tweaked in order
212 * to pick which range should be used in the case of
213 * overlapping set points.
214 * @n_voltages: Number of preferred voltage set points present in this
215 * range
216 * @range_sel: Voltage range register value corresponding to this range
217 *
218 * The following relationships must be true for the values used in this struct:
219 * (max_uV - min_uV) % step_uV == 0
220 * (set_point_min_uV - min_uV) % step_uV == 0*
221 * (set_point_max_uV - min_uV) % step_uV == 0*
222 * n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1
223 *
224 * *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to
225 * specify that the voltage range has meaning, but is not preferred.
226 */
227 struct spmi_voltage_range {
228 int min_uV;
229 int max_uV;
230 int step_uV;
231 int set_point_min_uV;
232 int set_point_max_uV;
233 unsigned n_voltages;
234 u8 range_sel;
235 };
236
237 /*
238 * The ranges specified in the spmi_voltage_set_points struct must be listed
239 * so that range[i].set_point_max_uV < range[i+1].set_point_min_uV.
240 */
241 struct spmi_voltage_set_points {
242 struct spmi_voltage_range *range;
243 int count;
244 unsigned n_voltages;
245 };
246
247 struct spmi_regulator {
248 struct regulator_desc desc;
249 struct device *dev;
250 struct delayed_work ocp_work;
251 struct regmap *regmap;
252 struct spmi_voltage_set_points *set_points;
253 enum spmi_regulator_logical_type logical_type;
254 int ocp_irq;
255 int ocp_count;
256 int ocp_max_retries;
257 int ocp_retry_delay_ms;
258 int hpm_min_load;
259 int slew_rate;
260 ktime_t vs_enable_time;
261 u16 base;
262 struct list_head node;
263 };
264
265 struct spmi_regulator_mapping {
266 enum spmi_regulator_type type;
267 enum spmi_regulator_subtype subtype;
268 enum spmi_regulator_logical_type logical_type;
269 u32 revision_min;
270 u32 revision_max;
271 struct regulator_ops *ops;
272 struct spmi_voltage_set_points *set_points;
273 int hpm_min_load;
274 };
275
276 struct spmi_regulator_data {
277 const char *name;
278 u16 base;
279 const char *supply;
280 const char *ocp;
281 u16 force_type;
282 };
283
284 #define SPMI_VREG(_type, _subtype, _dig_major_min, _dig_major_max, \
285 _logical_type, _ops_val, _set_points_val, _hpm_min_load) \
286 { \
287 .type = SPMI_REGULATOR_TYPE_##_type, \
288 .subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \
289 .revision_min = _dig_major_min, \
290 .revision_max = _dig_major_max, \
291 .logical_type = SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \
292 .ops = &spmi_##_ops_val##_ops, \
293 .set_points = &_set_points_val##_set_points, \
294 .hpm_min_load = _hpm_min_load, \
295 }
296
297 #define SPMI_VREG_VS(_subtype, _dig_major_min, _dig_major_max) \
298 { \
299 .type = SPMI_REGULATOR_TYPE_VS, \
300 .subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \
301 .revision_min = _dig_major_min, \
302 .revision_max = _dig_major_max, \
303 .logical_type = SPMI_REGULATOR_LOGICAL_TYPE_VS, \
304 .ops = &spmi_vs_ops, \
305 }
306
307 #define SPMI_VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \
308 _set_point_max_uV, _max_uV, _step_uV) \
309 { \
310 .min_uV = _min_uV, \
311 .max_uV = _max_uV, \
312 .set_point_min_uV = _set_point_min_uV, \
313 .set_point_max_uV = _set_point_max_uV, \
314 .step_uV = _step_uV, \
315 .range_sel = _range_sel, \
316 }
317
318 #define DEFINE_SPMI_SET_POINTS(name) \
319 struct spmi_voltage_set_points name##_set_points = { \
320 .range = name##_ranges, \
321 .count = ARRAY_SIZE(name##_ranges), \
322 }
323
324 /*
325 * These tables contain the physically available PMIC regulator voltage setpoint
326 * ranges. Where two ranges overlap in hardware, one of the ranges is trimmed
327 * to ensure that the setpoints available to software are monotonically
328 * increasing and unique. The set_voltage callback functions expect these
329 * properties to hold.
330 */
331 static struct spmi_voltage_range pldo_ranges[] = {
332 SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
333 SPMI_VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000),
334 SPMI_VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000),
335 };
336
337 static struct spmi_voltage_range nldo1_ranges[] = {
338 SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
339 };
340
341 static struct spmi_voltage_range nldo2_ranges[] = {
342 SPMI_VOLTAGE_RANGE(0, 375000, 0, 0, 1537500, 12500),
343 SPMI_VOLTAGE_RANGE(1, 375000, 375000, 768750, 768750, 6250),
344 SPMI_VOLTAGE_RANGE(2, 750000, 775000, 1537500, 1537500, 12500),
345 };
346
347 static struct spmi_voltage_range nldo3_ranges[] = {
348 SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
349 SPMI_VOLTAGE_RANGE(1, 375000, 0, 0, 1537500, 12500),
350 SPMI_VOLTAGE_RANGE(2, 750000, 0, 0, 1537500, 12500),
351 };
352
353 static struct spmi_voltage_range ln_ldo_ranges[] = {
354 SPMI_VOLTAGE_RANGE(1, 690000, 690000, 1110000, 1110000, 60000),
355 SPMI_VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000),
356 };
357
358 static struct spmi_voltage_range smps_ranges[] = {
359 SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500),
360 SPMI_VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000),
361 };
362
363 static struct spmi_voltage_range ftsmps_ranges[] = {
364 SPMI_VOLTAGE_RANGE(0, 0, 350000, 1275000, 1275000, 5000),
365 SPMI_VOLTAGE_RANGE(1, 0, 1280000, 2040000, 2040000, 10000),
366 };
367
368 static struct spmi_voltage_range ftsmps2p5_ranges[] = {
369 SPMI_VOLTAGE_RANGE(0, 80000, 350000, 1355000, 1355000, 5000),
370 SPMI_VOLTAGE_RANGE(1, 160000, 1360000, 2200000, 2200000, 10000),
371 };
372
373 static struct spmi_voltage_range boost_ranges[] = {
374 SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
375 };
376
377 static struct spmi_voltage_range boost_byp_ranges[] = {
378 SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
379 };
380
381 static struct spmi_voltage_range ult_lo_smps_ranges[] = {
382 SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500),
383 SPMI_VOLTAGE_RANGE(1, 750000, 0, 0, 1525000, 25000),
384 };
385
386 static struct spmi_voltage_range ult_ho_smps_ranges[] = {
387 SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
388 };
389
390 static struct spmi_voltage_range ult_nldo_ranges[] = {
391 SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
392 };
393
394 static struct spmi_voltage_range ult_pldo_ranges[] = {
395 SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
396 };
397
398 static DEFINE_SPMI_SET_POINTS(pldo);
399 static DEFINE_SPMI_SET_POINTS(nldo1);
400 static DEFINE_SPMI_SET_POINTS(nldo2);
401 static DEFINE_SPMI_SET_POINTS(nldo3);
402 static DEFINE_SPMI_SET_POINTS(ln_ldo);
403 static DEFINE_SPMI_SET_POINTS(smps);
404 static DEFINE_SPMI_SET_POINTS(ftsmps);
405 static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
406 static DEFINE_SPMI_SET_POINTS(boost);
407 static DEFINE_SPMI_SET_POINTS(boost_byp);
408 static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
409 static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
410 static DEFINE_SPMI_SET_POINTS(ult_nldo);
411 static DEFINE_SPMI_SET_POINTS(ult_pldo);
412
413 static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf,
414 int len)
415 {
416 return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len);
417 }
418
419 static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr,
420 u8 *buf, int len)
421 {
422 return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len);
423 }
424
425 static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val,
426 u8 mask)
427 {
428 return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val);
429 }
430
431 static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev)
432 {
433 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
434 u8 reg;
435
436 spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, &reg, 1);
437
438 return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE;
439 }
440
441 static int spmi_regulator_common_enable(struct regulator_dev *rdev)
442 {
443 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
444
445 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
446 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
447 }
448
449 static int spmi_regulator_vs_enable(struct regulator_dev *rdev)
450 {
451 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
452
453 if (vreg->ocp_irq) {
454 vreg->ocp_count = 0;
455 vreg->vs_enable_time = ktime_get();
456 }
457
458 return spmi_regulator_common_enable(rdev);
459 }
460
461 static int spmi_regulator_common_disable(struct regulator_dev *rdev)
462 {
463 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
464
465 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
466 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
467 }
468
469 static int spmi_regulator_select_voltage(struct spmi_regulator *vreg,
470 int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
471 unsigned *selector)
472 {
473 const struct spmi_voltage_range *range;
474 int uV = min_uV;
475 int lim_min_uV, lim_max_uV, i, range_id, range_max_uV;
476
477 /* Check if request voltage is outside of physically settable range. */
478 lim_min_uV = vreg->set_points->range[0].set_point_min_uV;
479 lim_max_uV =
480 vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV;
481
482 if (uV < lim_min_uV && max_uV >= lim_min_uV)
483 uV = lim_min_uV;
484
485 if (uV < lim_min_uV || uV > lim_max_uV) {
486 dev_err(vreg->dev,
487 "request v=[%d, %d] is outside possible v=[%d, %d]\n",
488 min_uV, max_uV, lim_min_uV, lim_max_uV);
489 return -EINVAL;
490 }
491
492 /* Find the range which uV is inside of. */
493 for (i = vreg->set_points->count - 1; i > 0; i--) {
494 range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV;
495 if (uV > range_max_uV && range_max_uV > 0)
496 break;
497 }
498
499 range_id = i;
500 range = &vreg->set_points->range[range_id];
501 *range_sel = range->range_sel;
502
503 /*
504 * Force uV to be an allowed set point by applying a ceiling function to
505 * the uV value.
506 */
507 *voltage_sel = (uV - range->min_uV + range->step_uV - 1)
508 / range->step_uV;
509 uV = *voltage_sel * range->step_uV + range->min_uV;
510
511 if (uV > max_uV) {
512 dev_err(vreg->dev,
513 "request v=[%d, %d] cannot be met by any set point; "
514 "next set point: %d\n",
515 min_uV, max_uV, uV);
516 return -EINVAL;
517 }
518
519 *selector = 0;
520 for (i = 0; i < range_id; i++)
521 *selector += vreg->set_points->range[i].n_voltages;
522 *selector += (uV - range->set_point_min_uV) / range->step_uV;
523
524 return 0;
525 }
526
527 static const struct spmi_voltage_range *
528 spmi_regulator_find_range(struct spmi_regulator *vreg)
529 {
530 u8 range_sel;
531 const struct spmi_voltage_range *range, *end;
532
533 range = vreg->set_points->range;
534 end = range + vreg->set_points->count;
535
536 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);
537
538 for (; range < end; range++)
539 if (range->range_sel == range_sel)
540 return range;
541
542 return NULL;
543 }
544
545 static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg,
546 int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
547 unsigned *selector)
548 {
549 const struct spmi_voltage_range *range;
550 int uV = min_uV;
551 int i;
552
553 range = spmi_regulator_find_range(vreg);
554 if (!range)
555 goto different_range;
556
557 if (uV < range->min_uV && max_uV >= range->min_uV)
558 uV = range->min_uV;
559
560 if (uV < range->min_uV || uV > range->max_uV) {
561 /* Current range doesn't support the requested voltage. */
562 goto different_range;
563 }
564
565 /*
566 * Force uV to be an allowed set point by applying a ceiling function to
567 * the uV value.
568 */
569 *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
570 uV = *voltage_sel * range->step_uV + range->min_uV;
571
572 if (uV > max_uV) {
573 /*
574 * No set point in the current voltage range is within the
575 * requested min_uV to max_uV range.
576 */
577 goto different_range;
578 }
579
580 *selector = 0;
581 for (i = 0; i < vreg->set_points->count; i++) {
582 if (uV >= vreg->set_points->range[i].set_point_min_uV
583 && uV <= vreg->set_points->range[i].set_point_max_uV) {
584 *selector +=
585 (uV - vreg->set_points->range[i].set_point_min_uV)
586 / vreg->set_points->range[i].step_uV;
587 break;
588 }
589
590 *selector += vreg->set_points->range[i].n_voltages;
591 }
592
593 if (*selector >= vreg->set_points->n_voltages)
594 goto different_range;
595
596 return 0;
597
598 different_range:
599 return spmi_regulator_select_voltage(vreg, min_uV, max_uV,
600 range_sel, voltage_sel, selector);
601 }
602
603 static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev,
604 int min_uV, int max_uV, unsigned *selector)
605 {
606 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
607 int ret;
608 u8 buf[2];
609 u8 range_sel, voltage_sel;
610
611 /*
612 * Favor staying in the current voltage range if possible. This avoids
613 * voltage spikes that occur when changing the voltage range.
614 */
615 ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
616 &range_sel, &voltage_sel, selector);
617 if (ret)
618 return ret;
619
620 buf[0] = range_sel;
621 buf[1] = voltage_sel;
622 return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
623 }
624
625 static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
626 unsigned int old_selector, unsigned int new_selector)
627 {
628 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
629 const struct spmi_voltage_range *range;
630 int diff_uV;
631
632 range = spmi_regulator_find_range(vreg);
633 if (!range)
634 return -EINVAL;
635
636 diff_uV = abs(new_selector - old_selector) * range->step_uV;
637
638 return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
639 }
640
641 static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
642 {
643 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
644 const struct spmi_voltage_range *range;
645 u8 voltage_sel;
646
647 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
648
649 range = spmi_regulator_find_range(vreg);
650 if (!range)
651 return VOLTAGE_UNKNOWN;
652
653 return range->step_uV * voltage_sel + range->min_uV;
654 }
655
656 static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
657 int min_uV, int max_uV, unsigned *selector)
658 {
659 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
660 int ret;
661 u8 range_sel, sel;
662
663 ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel,
664 &sel, selector);
665 if (ret) {
666 dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret);
667 return ret;
668 }
669
670 /*
671 * Certain types of regulators do not have a range select register so
672 * only voltage set register needs to be written.
673 */
674 return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
675 }
676
677 static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
678 {
679 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
680 const struct spmi_voltage_range *range = vreg->set_points->range;
681 u8 voltage_sel;
682
683 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
684
685 return range->step_uV * voltage_sel + range->min_uV;
686 }
687
688 static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
689 int min_uV, int max_uV, unsigned *selector)
690 {
691 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
692 int ret;
693 u8 range_sel, voltage_sel;
694
695 /*
696 * Favor staying in the current voltage range if possible. This avoids
697 * voltage spikes that occur when changing the voltage range.
698 */
699 ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
700 &range_sel, &voltage_sel, selector);
701 if (ret)
702 return ret;
703
704 /*
705 * Calculate VSET based on range
706 * In case of range 0: voltage_sel is a 7 bit value, can be written
707 * witout any modification.
708 * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
709 * [011].
710 */
711 if (range_sel == 1)
712 voltage_sel |= ULT_SMPS_RANGE_SPLIT;
713
714 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
715 voltage_sel, 0xff);
716 }
717
718 static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
719 {
720 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
721 const struct spmi_voltage_range *range;
722 u8 voltage_sel;
723
724 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
725
726 range = spmi_regulator_find_range(vreg);
727 if (!range)
728 return VOLTAGE_UNKNOWN;
729
730 if (range->range_sel == 1)
731 voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;
732
733 return range->step_uV * voltage_sel + range->min_uV;
734 }
735
736 static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
737 unsigned selector)
738 {
739 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
740 int uV = 0;
741 int i;
742
743 if (selector >= vreg->set_points->n_voltages)
744 return 0;
745
746 for (i = 0; i < vreg->set_points->count; i++) {
747 if (selector < vreg->set_points->range[i].n_voltages) {
748 uV = selector * vreg->set_points->range[i].step_uV
749 + vreg->set_points->range[i].set_point_min_uV;
750 break;
751 }
752
753 selector -= vreg->set_points->range[i].n_voltages;
754 }
755
756 return uV;
757 }
758
759 static int
760 spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
761 {
762 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
763 u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
764 u8 val = 0;
765
766 if (enable)
767 val = mask;
768
769 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
770 }
771
772 static int
773 spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
774 {
775 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
776 u8 val;
777 int ret;
778
779 ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
780 *enable = val & SPMI_COMMON_MODE_BYPASS_MASK;
781
782 return ret;
783 }
784
785 static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
786 {
787 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
788 u8 reg;
789
790 spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);
791
792 if (reg & SPMI_COMMON_MODE_HPM_MASK)
793 return REGULATOR_MODE_NORMAL;
794
795 return REGULATOR_MODE_IDLE;
796 }
797
798 static int
799 spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
800 {
801 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
802 u8 mask = SPMI_COMMON_MODE_HPM_MASK;
803 u8 val = 0;
804
805 if (mode == REGULATOR_MODE_NORMAL)
806 val = mask;
807
808 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
809 }
810
811 static int
812 spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
813 {
814 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
815 unsigned int mode;
816
817 if (load_uA >= vreg->hpm_min_load)
818 mode = REGULATOR_MODE_NORMAL;
819 else
820 mode = REGULATOR_MODE_IDLE;
821
822 return spmi_regulator_common_set_mode(rdev, mode);
823 }
824
825 static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
826 {
827 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
828 unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;
829
830 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
831 mask, mask);
832 }
833
834 static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
835 {
836 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
837 unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;
838
839 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
840 mask, mask);
841 }
842
843 static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
844 {
845 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
846 enum spmi_regulator_logical_type type = vreg->logical_type;
847 unsigned int current_reg;
848 u8 reg;
849 u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
850 SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
851 int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;
852
853 if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
854 current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
855 else
856 current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;
857
858 if (ilim_uA > max || ilim_uA <= 0)
859 return -EINVAL;
860
861 reg = (ilim_uA - 1) / 500;
862 reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
863
864 return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
865 }
866
867 static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
868 {
869 int ret;
870
871 ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
872 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
873
874 vreg->vs_enable_time = ktime_get();
875
876 ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
877 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
878
879 return ret;
880 }
881
882 static void spmi_regulator_vs_ocp_work(struct work_struct *work)
883 {
884 struct delayed_work *dwork = to_delayed_work(work);
885 struct spmi_regulator *vreg
886 = container_of(dwork, struct spmi_regulator, ocp_work);
887
888 spmi_regulator_vs_clear_ocp(vreg);
889 }
890
891 static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
892 {
893 struct spmi_regulator *vreg = data;
894 ktime_t ocp_irq_time;
895 s64 ocp_trigger_delay_us;
896
897 ocp_irq_time = ktime_get();
898 ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
899 vreg->vs_enable_time);
900
901 /*
902 * Reset the OCP count if there is a large delay between switch enable
903 * and when OCP triggers. This is indicative of a hotplug event as
904 * opposed to a fault.
905 */
906 if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
907 vreg->ocp_count = 0;
908
909 /* Wait for switch output to settle back to 0 V after OCP triggered. */
910 udelay(SPMI_VS_OCP_FALL_DELAY_US);
911
912 vreg->ocp_count++;
913
914 if (vreg->ocp_count == 1) {
915 /* Immediately clear the over current condition. */
916 spmi_regulator_vs_clear_ocp(vreg);
917 } else if (vreg->ocp_count <= vreg->ocp_max_retries) {
918 /* Schedule the over current clear task to run later. */
919 schedule_delayed_work(&vreg->ocp_work,
920 msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
921 } else {
922 dev_err(vreg->dev,
923 "OCP triggered %d times; no further retries\n",
924 vreg->ocp_count);
925 }
926
927 return IRQ_HANDLED;
928 }
929
930 static struct regulator_ops spmi_smps_ops = {
931 .enable = spmi_regulator_common_enable,
932 .disable = spmi_regulator_common_disable,
933 .is_enabled = spmi_regulator_common_is_enabled,
934 .set_voltage = spmi_regulator_common_set_voltage,
935 .get_voltage = spmi_regulator_common_get_voltage,
936 .list_voltage = spmi_regulator_common_list_voltage,
937 .set_mode = spmi_regulator_common_set_mode,
938 .get_mode = spmi_regulator_common_get_mode,
939 .set_load = spmi_regulator_common_set_load,
940 .set_pull_down = spmi_regulator_common_set_pull_down,
941 };
942
943 static struct regulator_ops spmi_ldo_ops = {
944 .enable = spmi_regulator_common_enable,
945 .disable = spmi_regulator_common_disable,
946 .is_enabled = spmi_regulator_common_is_enabled,
947 .set_voltage = spmi_regulator_common_set_voltage,
948 .get_voltage = spmi_regulator_common_get_voltage,
949 .list_voltage = spmi_regulator_common_list_voltage,
950 .set_mode = spmi_regulator_common_set_mode,
951 .get_mode = spmi_regulator_common_get_mode,
952 .set_load = spmi_regulator_common_set_load,
953 .set_bypass = spmi_regulator_common_set_bypass,
954 .get_bypass = spmi_regulator_common_get_bypass,
955 .set_pull_down = spmi_regulator_common_set_pull_down,
956 .set_soft_start = spmi_regulator_common_set_soft_start,
957 };
958
959 static struct regulator_ops spmi_ln_ldo_ops = {
960 .enable = spmi_regulator_common_enable,
961 .disable = spmi_regulator_common_disable,
962 .is_enabled = spmi_regulator_common_is_enabled,
963 .set_voltage = spmi_regulator_common_set_voltage,
964 .get_voltage = spmi_regulator_common_get_voltage,
965 .list_voltage = spmi_regulator_common_list_voltage,
966 .set_bypass = spmi_regulator_common_set_bypass,
967 .get_bypass = spmi_regulator_common_get_bypass,
968 };
969
970 static struct regulator_ops spmi_vs_ops = {
971 .enable = spmi_regulator_vs_enable,
972 .disable = spmi_regulator_common_disable,
973 .is_enabled = spmi_regulator_common_is_enabled,
974 .set_pull_down = spmi_regulator_common_set_pull_down,
975 .set_soft_start = spmi_regulator_common_set_soft_start,
976 };
977
978 static struct regulator_ops spmi_boost_ops = {
979 .enable = spmi_regulator_common_enable,
980 .disable = spmi_regulator_common_disable,
981 .is_enabled = spmi_regulator_common_is_enabled,
982 .set_voltage = spmi_regulator_single_range_set_voltage,
983 .get_voltage = spmi_regulator_single_range_get_voltage,
984 .list_voltage = spmi_regulator_common_list_voltage,
985 .set_input_current_limit = spmi_regulator_set_ilim,
986 };
987
988 static struct regulator_ops spmi_ftsmps_ops = {
989 .enable = spmi_regulator_common_enable,
990 .disable = spmi_regulator_common_disable,
991 .is_enabled = spmi_regulator_common_is_enabled,
992 .set_voltage = spmi_regulator_common_set_voltage,
993 .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel,
994 .get_voltage = spmi_regulator_common_get_voltage,
995 .list_voltage = spmi_regulator_common_list_voltage,
996 .set_mode = spmi_regulator_common_set_mode,
997 .get_mode = spmi_regulator_common_get_mode,
998 .set_load = spmi_regulator_common_set_load,
999 .set_pull_down = spmi_regulator_common_set_pull_down,
1000 };
1001
1002 static struct regulator_ops spmi_ult_lo_smps_ops = {
1003 .enable = spmi_regulator_common_enable,
1004 .disable = spmi_regulator_common_disable,
1005 .is_enabled = spmi_regulator_common_is_enabled,
1006 .set_voltage = spmi_regulator_ult_lo_smps_set_voltage,
1007 .get_voltage = spmi_regulator_ult_lo_smps_get_voltage,
1008 .list_voltage = spmi_regulator_common_list_voltage,
1009 .set_mode = spmi_regulator_common_set_mode,
1010 .get_mode = spmi_regulator_common_get_mode,
1011 .set_load = spmi_regulator_common_set_load,
1012 .set_pull_down = spmi_regulator_common_set_pull_down,
1013 };
1014
1015 static struct regulator_ops spmi_ult_ho_smps_ops = {
1016 .enable = spmi_regulator_common_enable,
1017 .disable = spmi_regulator_common_disable,
1018 .is_enabled = spmi_regulator_common_is_enabled,
1019 .set_voltage = spmi_regulator_single_range_set_voltage,
1020 .get_voltage = spmi_regulator_single_range_get_voltage,
1021 .list_voltage = spmi_regulator_common_list_voltage,
1022 .set_mode = spmi_regulator_common_set_mode,
1023 .get_mode = spmi_regulator_common_get_mode,
1024 .set_load = spmi_regulator_common_set_load,
1025 .set_pull_down = spmi_regulator_common_set_pull_down,
1026 };
1027
1028 static struct regulator_ops spmi_ult_ldo_ops = {
1029 .enable = spmi_regulator_common_enable,
1030 .disable = spmi_regulator_common_disable,
1031 .is_enabled = spmi_regulator_common_is_enabled,
1032 .set_voltage = spmi_regulator_single_range_set_voltage,
1033 .get_voltage = spmi_regulator_single_range_get_voltage,
1034 .list_voltage = spmi_regulator_common_list_voltage,
1035 .set_mode = spmi_regulator_common_set_mode,
1036 .get_mode = spmi_regulator_common_get_mode,
1037 .set_load = spmi_regulator_common_set_load,
1038 .set_bypass = spmi_regulator_common_set_bypass,
1039 .get_bypass = spmi_regulator_common_get_bypass,
1040 .set_pull_down = spmi_regulator_common_set_pull_down,
1041 .set_soft_start = spmi_regulator_common_set_soft_start,
1042 };
1043
1044 /* Maximum possible digital major revision value */
1045 #define INF 0xFF
1046
1047 static const struct spmi_regulator_mapping supported_regulators[] = {
1048 /* type subtype dig_min dig_max ltype ops setpoints hpm_min */
1049 SPMI_VREG(BUCK, GP_CTL, 0, INF, SMPS, smps, smps, 100000),
1050 SPMI_VREG(LDO, N300, 0, INF, LDO, ldo, nldo1, 10000),
1051 SPMI_VREG(LDO, N600, 0, 0, LDO, ldo, nldo2, 10000),
1052 SPMI_VREG(LDO, N1200, 0, 0, LDO, ldo, nldo2, 10000),
1053 SPMI_VREG(LDO, N600, 1, INF, LDO, ldo, nldo3, 10000),
1054 SPMI_VREG(LDO, N1200, 1, INF, LDO, ldo, nldo3, 10000),
1055 SPMI_VREG(LDO, N600_ST, 0, 0, LDO, ldo, nldo2, 10000),
1056 SPMI_VREG(LDO, N1200_ST, 0, 0, LDO, ldo, nldo2, 10000),
1057 SPMI_VREG(LDO, N600_ST, 1, INF, LDO, ldo, nldo3, 10000),
1058 SPMI_VREG(LDO, N1200_ST, 1, INF, LDO, ldo, nldo3, 10000),
1059 SPMI_VREG(LDO, P50, 0, INF, LDO, ldo, pldo, 5000),
1060 SPMI_VREG(LDO, P150, 0, INF, LDO, ldo, pldo, 10000),
1061 SPMI_VREG(LDO, P300, 0, INF, LDO, ldo, pldo, 10000),
1062 SPMI_VREG(LDO, P600, 0, INF, LDO, ldo, pldo, 10000),
1063 SPMI_VREG(LDO, P1200, 0, INF, LDO, ldo, pldo, 10000),
1064 SPMI_VREG(LDO, LN, 0, INF, LN_LDO, ln_ldo, ln_ldo, 0),
1065 SPMI_VREG(LDO, LV_P50, 0, INF, LDO, ldo, pldo, 5000),
1066 SPMI_VREG(LDO, LV_P150, 0, INF, LDO, ldo, pldo, 10000),
1067 SPMI_VREG(LDO, LV_P300, 0, INF, LDO, ldo, pldo, 10000),
1068 SPMI_VREG(LDO, LV_P600, 0, INF, LDO, ldo, pldo, 10000),
1069 SPMI_VREG(LDO, LV_P1200, 0, INF, LDO, ldo, pldo, 10000),
1070 SPMI_VREG_VS(LV100, 0, INF),
1071 SPMI_VREG_VS(LV300, 0, INF),
1072 SPMI_VREG_VS(MV300, 0, INF),
1073 SPMI_VREG_VS(MV500, 0, INF),
1074 SPMI_VREG_VS(HDMI, 0, INF),
1075 SPMI_VREG_VS(OTG, 0, INF),
1076 SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST, boost, boost, 0),
1077 SPMI_VREG(FTS, FTS_CTL, 0, INF, FTSMPS, ftsmps, ftsmps, 100000),
1078 SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
1079 SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
1080 SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1081 ult_lo_smps, 100000),
1082 SPMI_VREG(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1083 ult_lo_smps, 100000),
1084 SPMI_VREG(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1085 ult_lo_smps, 100000),
1086 SPMI_VREG(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps,
1087 ult_ho_smps, 100000),
1088 SPMI_VREG(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1089 SPMI_VREG(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1090 SPMI_VREG(ULT_LDO, N900_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1091 SPMI_VREG(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1092 SPMI_VREG(ULT_LDO, LV_P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1093 SPMI_VREG(ULT_LDO, LV_P300, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1094 SPMI_VREG(ULT_LDO, LV_P450, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1095 SPMI_VREG(ULT_LDO, P600, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1096 SPMI_VREG(ULT_LDO, P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1097 SPMI_VREG(ULT_LDO, P50, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000),
1098 };
1099
1100 static void spmi_calculate_num_voltages(struct spmi_voltage_set_points *points)
1101 {
1102 unsigned int n;
1103 struct spmi_voltage_range *range = points->range;
1104
1105 for (; range < points->range + points->count; range++) {
1106 n = 0;
1107 if (range->set_point_max_uV) {
1108 n = range->set_point_max_uV - range->set_point_min_uV;
1109 n = (n / range->step_uV) + 1;
1110 }
1111 range->n_voltages = n;
1112 points->n_voltages += n;
1113 }
1114 }
1115
1116 static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
1117 {
1118 const struct spmi_regulator_mapping *mapping;
1119 int ret, i;
1120 u32 dig_major_rev;
1121 u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1];
1122 u8 type, subtype;
1123
1124 ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version,
1125 ARRAY_SIZE(version));
1126 if (ret) {
1127 dev_err(vreg->dev, "could not read version registers\n");
1128 return ret;
1129 }
1130 dig_major_rev = version[SPMI_COMMON_REG_DIG_MAJOR_REV
1131 - SPMI_COMMON_REG_DIG_MAJOR_REV];
1132 if (!force_type) {
1133 type = version[SPMI_COMMON_REG_TYPE -
1134 SPMI_COMMON_REG_DIG_MAJOR_REV];
1135 subtype = version[SPMI_COMMON_REG_SUBTYPE -
1136 SPMI_COMMON_REG_DIG_MAJOR_REV];
1137 } else {
1138 type = force_type >> 8;
1139 subtype = force_type;
1140 }
1141
1142 for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) {
1143 mapping = &supported_regulators[i];
1144 if (mapping->type == type && mapping->subtype == subtype
1145 && mapping->revision_min <= dig_major_rev
1146 && mapping->revision_max >= dig_major_rev)
1147 goto found;
1148 }
1149
1150 dev_err(vreg->dev,
1151 "unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n",
1152 vreg->desc.name, type, subtype, dig_major_rev);
1153
1154 return -ENODEV;
1155
1156 found:
1157 vreg->logical_type = mapping->logical_type;
1158 vreg->set_points = mapping->set_points;
1159 vreg->hpm_min_load = mapping->hpm_min_load;
1160 vreg->desc.ops = mapping->ops;
1161
1162 if (mapping->set_points) {
1163 if (!mapping->set_points->n_voltages)
1164 spmi_calculate_num_voltages(mapping->set_points);
1165 vreg->desc.n_voltages = mapping->set_points->n_voltages;
1166 }
1167
1168 return 0;
1169 }
1170
1171 static int spmi_regulator_ftsmps_init_slew_rate(struct spmi_regulator *vreg)
1172 {
1173 int ret;
1174 u8 reg = 0;
1175 int step, delay, slew_rate;
1176 const struct spmi_voltage_range *range;
1177
1178 ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);
1179 if (ret) {
1180 dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
1181 return ret;
1182 }
1183
1184 range = spmi_regulator_find_range(vreg);
1185 if (!range)
1186 return -EINVAL;
1187
1188 step = reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK;
1189 step >>= SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT;
1190
1191 delay = reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK;
1192 delay >>= SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT;
1193
1194 /* slew_rate has units of uV/us */
1195 slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step);
1196 slew_rate /= 1000 * (SPMI_FTSMPS_STEP_DELAY << delay);
1197 slew_rate *= SPMI_FTSMPS_STEP_MARGIN_NUM;
1198 slew_rate /= SPMI_FTSMPS_STEP_MARGIN_DEN;
1199
1200 /* Ensure that the slew rate is greater than 0 */
1201 vreg->slew_rate = max(slew_rate, 1);
1202
1203 return ret;
1204 }
1205
1206 static unsigned int spmi_regulator_of_map_mode(unsigned int mode)
1207 {
1208 if (mode)
1209 return REGULATOR_MODE_NORMAL;
1210
1211 return REGULATOR_MODE_IDLE;
1212 }
1213
1214 static int spmi_regulator_of_parse(struct device_node *node,
1215 const struct regulator_desc *desc,
1216 struct regulator_config *config)
1217 {
1218 struct spmi_regulator *vreg = config->driver_data;
1219 struct device *dev = config->dev;
1220 int ret;
1221
1222 vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES;
1223 vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS;
1224
1225 if (vreg->logical_type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) {
1226 ret = spmi_regulator_ftsmps_init_slew_rate(vreg);
1227 if (ret)
1228 return ret;
1229 }
1230
1231 if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS)
1232 vreg->ocp_irq = 0;
1233
1234 if (vreg->ocp_irq) {
1235 ret = devm_request_irq(dev, vreg->ocp_irq,
1236 spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp",
1237 vreg);
1238 if (ret < 0) {
1239 dev_err(dev, "failed to request irq %d, ret=%d\n",
1240 vreg->ocp_irq, ret);
1241 return ret;
1242 }
1243
1244 INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work);
1245 }
1246
1247 return 0;
1248 }
1249
1250 static const struct spmi_regulator_data pm8941_regulators[] = {
1251 { "s1", 0x1400, "vdd_s1", },
1252 { "s2", 0x1700, "vdd_s2", },
1253 { "s3", 0x1a00, "vdd_s3", },
1254 { "l1", 0x4000, "vdd_l1_l3", },
1255 { "l2", 0x4100, "vdd_l2_lvs_1_2_3", },
1256 { "l3", 0x4200, "vdd_l1_l3", },
1257 { "l4", 0x4300, "vdd_l4_l11", },
1258 { "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 },
1259 { "l6", 0x4500, "vdd_l6_l12_l14_l15", },
1260 { "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 },
1261 { "l8", 0x4700, "vdd_l8_l16_l18_19", },
1262 { "l9", 0x4800, "vdd_l9_l10_l17_l22", },
1263 { "l10", 0x4900, "vdd_l9_l10_l17_l22", },
1264 { "l11", 0x4a00, "vdd_l4_l11", },
1265 { "l12", 0x4b00, "vdd_l6_l12_l14_l15", },
1266 { "l13", 0x4c00, "vdd_l13_l20_l23_l24", },
1267 { "l14", 0x4d00, "vdd_l6_l12_l14_l15", },
1268 { "l15", 0x4e00, "vdd_l6_l12_l14_l15", },
1269 { "l16", 0x4f00, "vdd_l8_l16_l18_19", },
1270 { "l17", 0x5000, "vdd_l9_l10_l17_l22", },
1271 { "l18", 0x5100, "vdd_l8_l16_l18_19", },
1272 { "l19", 0x5200, "vdd_l8_l16_l18_19", },
1273 { "l20", 0x5300, "vdd_l13_l20_l23_l24", },
1274 { "l21", 0x5400, "vdd_l21", },
1275 { "l22", 0x5500, "vdd_l9_l10_l17_l22", },
1276 { "l23", 0x5600, "vdd_l13_l20_l23_l24", },
1277 { "l24", 0x5700, "vdd_l13_l20_l23_l24", },
1278 { "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", },
1279 { "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", },
1280 { "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", },
1281 { "mvs1", 0x8300, "vin_5vs", },
1282 { "mvs2", 0x8400, "vin_5vs", },
1283 { }
1284 };
1285
1286 static const struct spmi_regulator_data pm8841_regulators[] = {
1287 { "s1", 0x1400, "vdd_s1", },
1288 { "s2", 0x1700, "vdd_s2", NULL, 0x1c08 },
1289 { "s3", 0x1a00, "vdd_s3", },
1290 { "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 },
1291 { "s5", 0x2000, "vdd_s5", NULL, 0x1c08 },
1292 { "s6", 0x2300, "vdd_s6", NULL, 0x1c08 },
1293 { "s7", 0x2600, "vdd_s7", NULL, 0x1c08 },
1294 { "s8", 0x2900, "vdd_s8", NULL, 0x1c08 },
1295 { }
1296 };
1297
1298 static const struct spmi_regulator_data pm8916_regulators[] = {
1299 { "s1", 0x1400, "vdd_s1", },
1300 { "s2", 0x1700, "vdd_s2", },
1301 { "s3", 0x1a00, "vdd_s3", },
1302 { "s4", 0x1d00, "vdd_s4", },
1303 { "l1", 0x4000, "vdd_l1_l3", },
1304 { "l2", 0x4100, "vdd_l2", },
1305 { "l3", 0x4200, "vdd_l1_l3", },
1306 { "l4", 0x4300, "vdd_l4_l5_l6", },
1307 { "l5", 0x4400, "vdd_l4_l5_l6", },
1308 { "l6", 0x4500, "vdd_l4_l5_l6", },
1309 { "l7", 0x4600, "vdd_l7", },
1310 { "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", },
1311 { "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", },
1312 { "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", },
1313 { "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", },
1314 { "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", },
1315 { "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", },
1316 { "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", },
1317 { "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", },
1318 { "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", },
1319 { "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", },
1320 { "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", },
1321 { }
1322 };
1323
1324 static const struct of_device_id qcom_spmi_regulator_match[] = {
1325 { .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
1326 { .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
1327 { .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
1328 { }
1329 };
1330 MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);
1331
1332 static int qcom_spmi_regulator_probe(struct platform_device *pdev)
1333 {
1334 const struct spmi_regulator_data *reg;
1335 const struct of_device_id *match;
1336 struct regulator_config config = { };
1337 struct regulator_dev *rdev;
1338 struct spmi_regulator *vreg;
1339 struct regmap *regmap;
1340 const char *name;
1341 struct device *dev = &pdev->dev;
1342 int ret;
1343 struct list_head *vreg_list;
1344
1345 vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
1346 if (!vreg_list)
1347 return -ENOMEM;
1348 INIT_LIST_HEAD(vreg_list);
1349 platform_set_drvdata(pdev, vreg_list);
1350
1351 regmap = dev_get_regmap(dev->parent, NULL);
1352 if (!regmap)
1353 return -ENODEV;
1354
1355 match = of_match_device(qcom_spmi_regulator_match, &pdev->dev);
1356 if (!match)
1357 return -ENODEV;
1358
1359 for (reg = match->data; reg->name; reg++) {
1360 vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
1361 if (!vreg)
1362 return -ENOMEM;
1363
1364 vreg->dev = dev;
1365 vreg->base = reg->base;
1366 vreg->regmap = regmap;
1367
1368 if (reg->ocp) {
1369 vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
1370 if (vreg->ocp_irq < 0) {
1371 ret = vreg->ocp_irq;
1372 goto err;
1373 }
1374 }
1375
1376 vreg->desc.id = -1;
1377 vreg->desc.owner = THIS_MODULE;
1378 vreg->desc.type = REGULATOR_VOLTAGE;
1379 vreg->desc.name = name = reg->name;
1380 vreg->desc.supply_name = reg->supply;
1381 vreg->desc.of_match = reg->name;
1382 vreg->desc.of_parse_cb = spmi_regulator_of_parse;
1383 vreg->desc.of_map_mode = spmi_regulator_of_map_mode;
1384
1385 ret = spmi_regulator_match(vreg, reg->force_type);
1386 if (ret)
1387 goto err;
1388
1389 config.dev = dev;
1390 config.driver_data = vreg;
1391 rdev = devm_regulator_register(dev, &vreg->desc, &config);
1392 if (IS_ERR(rdev)) {
1393 dev_err(dev, "failed to register %s\n", name);
1394 ret = PTR_ERR(rdev);
1395 goto err;
1396 }
1397
1398 INIT_LIST_HEAD(&vreg->node);
1399 list_add(&vreg->node, vreg_list);
1400 }
1401
1402 return 0;
1403
1404 err:
1405 list_for_each_entry(vreg, vreg_list, node)
1406 if (vreg->ocp_irq)
1407 cancel_delayed_work_sync(&vreg->ocp_work);
1408 return ret;
1409 }
1410
1411 static int qcom_spmi_regulator_remove(struct platform_device *pdev)
1412 {
1413 struct spmi_regulator *vreg;
1414 struct list_head *vreg_list = platform_get_drvdata(pdev);
1415
1416 list_for_each_entry(vreg, vreg_list, node)
1417 if (vreg->ocp_irq)
1418 cancel_delayed_work_sync(&vreg->ocp_work);
1419
1420 return 0;
1421 }
1422
1423 static struct platform_driver qcom_spmi_regulator_driver = {
1424 .driver = {
1425 .name = "qcom-spmi-regulator",
1426 .of_match_table = qcom_spmi_regulator_match,
1427 },
1428 .probe = qcom_spmi_regulator_probe,
1429 .remove = qcom_spmi_regulator_remove,
1430 };
1431 module_platform_driver(qcom_spmi_regulator_driver);
1432
1433 MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver");
1434 MODULE_LICENSE("GPL v2");
1435 MODULE_ALIAS("platform:qcom-spmi-regulator");
Linux kernel - Deliverables
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