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regulator: fix simple_return.cocci warnings
[deliverable/linux.git] / drivers / regulator / qcom_spmi-regulator.c
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e92a4047
SB		 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. */
30enum 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
43enum 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
54enum 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
94enum 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
107enum spmi_vs_registers {
108 SPMI_VS_REG_OCP = 0x4a,
109 SPMI_VS_REG_SOFT_START = 0x4c,
110};
111
112enum spmi_boost_registers {
113 SPMI_BOOST_REG_CURRENT_LIMIT = 0x4a,
114};
115
116enum 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 */
121enum 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 */
227struct 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 */
241struct spmi_voltage_set_points {
242 struct spmi_voltage_range *range;
243 int count;
244 unsigned n_voltages;
245};
246
247struct 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
265struct 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
276struct 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) \
319struct 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 */
331static 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
337static struct spmi_voltage_range nldo1_ranges[] = {
338 SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
339};
340
341static 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
347static 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
353static 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
358static 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
363static 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
368static 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
373static struct spmi_voltage_range boost_ranges[] = {
374 SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
375};
376
377static struct spmi_voltage_range boost_byp_ranges[] = {
378 SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
379};
380
381static 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
386static struct spmi_voltage_range ult_ho_smps_ranges[] = {
387 SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
388};
389
390static struct spmi_voltage_range ult_nldo_ranges[] = {
391 SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
392};
393
394static struct spmi_voltage_range ult_pldo_ranges[] = {
395 SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
396};
397
398static DEFINE_SPMI_SET_POINTS(pldo);
399static DEFINE_SPMI_SET_POINTS(nldo1);
400static DEFINE_SPMI_SET_POINTS(nldo2);
401static DEFINE_SPMI_SET_POINTS(nldo3);
402static DEFINE_SPMI_SET_POINTS(ln_ldo);
403static DEFINE_SPMI_SET_POINTS(smps);
404static DEFINE_SPMI_SET_POINTS(ftsmps);
405static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
406static DEFINE_SPMI_SET_POINTS(boost);
407static DEFINE_SPMI_SET_POINTS(boost_byp);
408static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
409static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
410static DEFINE_SPMI_SET_POINTS(ult_nldo);
411static DEFINE_SPMI_SET_POINTS(ult_pldo);
412
413static 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
419static 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
425static 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
431static 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
441static 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
449static 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
461static 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
469static 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
527static const struct spmi_voltage_range *
528spmi_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
545static 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 *selector += vreg->set_points->range[i].n_voltages;
590 }
591
592 if (*selector >= vreg->set_points->n_voltages)
593 goto different_range;
594
595 return 0;
596
597different_range:
598 return spmi_regulator_select_voltage(vreg, min_uV, max_uV,
599 range_sel, voltage_sel, selector);
600}
601
602static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev,
603 int min_uV, int max_uV, unsigned *selector)
604{
605 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
606 int ret;
607 u8 buf[2];
608 u8 range_sel, voltage_sel;
609
610 /*
611 * Favor staying in the current voltage range if possible. This avoids
612 * voltage spikes that occur when changing the voltage range.
613 */
614 ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
615 &range_sel, &voltage_sel, selector);
616 if (ret)
617 return ret;
618
619 buf[0] = range_sel;
620 buf[1] = voltage_sel;
621 return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
622}
623
624static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
625 unsigned int old_selector, unsigned int new_selector)
626{
627 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
628 const struct spmi_voltage_range *range;
629 int diff_uV;
630
631 range = spmi_regulator_find_range(vreg);
632 if (!range)
633 return -EINVAL;
634
635 diff_uV = abs(new_selector - old_selector) * range->step_uV;
636
637 return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
638}
639
640static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
641{
642 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
643 const struct spmi_voltage_range *range;
644 u8 voltage_sel;
645
646 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
647
648 range = spmi_regulator_find_range(vreg);
649 if (!range)
650 return VOLTAGE_UNKNOWN;
651
652 return range->step_uV * voltage_sel + range->min_uV;
653}
654
655static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
656 int min_uV, int max_uV, unsigned *selector)
657{
658 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
659 int ret;
660 u8 range_sel, sel;
661
662 ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel,
663 &sel, selector);
664 if (ret) {
665 dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret);
666 return ret;
667 }
668
669 /*
670 * Certain types of regulators do not have a range select register so
671 * only voltage set register needs to be written.
672 */
673 return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
674}
675
676static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
677{
678 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
679 const struct spmi_voltage_range *range = vreg->set_points->range;
680 u8 voltage_sel;
681
682 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
683
684 return range->step_uV * voltage_sel + range->min_uV;
685}
686
687static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
688 int min_uV, int max_uV, unsigned *selector)
689{
690 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
691 int ret;
692 u8 range_sel, voltage_sel;
693
694 /*
695 * Favor staying in the current voltage range if possible. This avoids
696 * voltage spikes that occur when changing the voltage range.
697 */
698 ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
699 &range_sel, &voltage_sel, selector);
700 if (ret)
701 return ret;
702
703 /*
704 * Calculate VSET based on range
705 * In case of range 0: voltage_sel is a 7 bit value, can be written
706 * witout any modification.
707 * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
708 * [011].
709 */
710 if (range_sel == 1)
711 voltage_sel |= ULT_SMPS_RANGE_SPLIT;
712
0f94bffa 713 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
e92a4047 714 voltage_sel, 0xff);
e92a4047
SB		 715}
716
717static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
718{
719 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
720 const struct spmi_voltage_range *range;
721 u8 voltage_sel;
722
723 spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
724
725 range = spmi_regulator_find_range(vreg);
726 if (!range)
727 return VOLTAGE_UNKNOWN;
728
729 if (range->range_sel == 1)
730 voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;
731
732 return range->step_uV * voltage_sel + range->min_uV;
733}
734
735static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
736 unsigned selector)
737{
738 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
739 int uV = 0;
740 int i;
741
742 if (selector >= vreg->set_points->n_voltages)
743 return 0;
744
745 for (i = 0; i < vreg->set_points->count; i++) {
746 if (selector < vreg->set_points->range[i].n_voltages)
747 uV = selector * vreg->set_points->range[i].step_uV
748 + vreg->set_points->range[i].set_point_min_uV;
749 break;
750
751 selector -= vreg->set_points->range[i].n_voltages;
752 }
753
754 return uV;
755}
756
757static int
758spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
759{
760 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
761 u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
762 u8 val = 0;
763
764 if (enable)
765 val = mask;
766
767 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
768}
769
770static int
771spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
772{
773 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
774 u8 val;
775 int ret;
776
777 ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
778 *enable = val & SPMI_COMMON_MODE_BYPASS_MASK;
779
780 return ret;
781}
782
783static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
784{
785 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
786 u8 reg;
787
788 spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);
789
790 if (reg & SPMI_COMMON_MODE_HPM_MASK)
791 return REGULATOR_MODE_NORMAL;
792
793 return REGULATOR_MODE_IDLE;
794}
795
796static int
797spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
798{
799 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
800 u8 mask = SPMI_COMMON_MODE_HPM_MASK;
801 u8 val = 0;
802
803 if (mode == REGULATOR_MODE_NORMAL)
804 val = mask;
805
806 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
807}
808
809static int
810spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
811{
812 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
813 unsigned int mode;
814
815 if (load_uA >= vreg->hpm_min_load)
816 mode = REGULATOR_MODE_NORMAL;
817 else
818 mode = REGULATOR_MODE_IDLE;
819
820 return spmi_regulator_common_set_mode(rdev, mode);
821}
822
823static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
824{
825 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
826 unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;
827
828 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
829 mask, mask);
830}
831
832static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
833{
834 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
835 unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;
836
837 return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
838 mask, mask);
839}
840
841static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
842{
843 struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
844 enum spmi_regulator_logical_type type = vreg->logical_type;
845 unsigned int current_reg;
846 u8 reg;
847 u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
848 SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
849 int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;
850
851 if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
852 current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
853 else
854 current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;
855
856 if (ilim_uA > max || ilim_uA <= 0)
857 return -EINVAL;
858
859 reg = (ilim_uA - 1) / 500;
860 reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
861
862 return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
863}
864
865static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
866{
867 int ret;
868
869 ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
870 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
871
872 vreg->vs_enable_time = ktime_get();
873
874 ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
875 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
876
877 return ret;
878}
879
880static void spmi_regulator_vs_ocp_work(struct work_struct *work)
881{
882 struct delayed_work *dwork = to_delayed_work(work);
883 struct spmi_regulator *vreg
884 = container_of(dwork, struct spmi_regulator, ocp_work);
885
886 spmi_regulator_vs_clear_ocp(vreg);
887}
888
889static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
890{
891 struct spmi_regulator *vreg = data;
892 ktime_t ocp_irq_time;
893 s64 ocp_trigger_delay_us;
894
895 ocp_irq_time = ktime_get();
896 ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
897 vreg->vs_enable_time);
898
899 /*
900 * Reset the OCP count if there is a large delay between switch enable
901 * and when OCP triggers. This is indicative of a hotplug event as
902 * opposed to a fault.
903 */
904 if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
905 vreg->ocp_count = 0;
906
907 /* Wait for switch output to settle back to 0 V after OCP triggered. */
908 udelay(SPMI_VS_OCP_FALL_DELAY_US);
909
910 vreg->ocp_count++;
911
912 if (vreg->ocp_count == 1) {
913 /* Immediately clear the over current condition. */
914 spmi_regulator_vs_clear_ocp(vreg);
915 } else if (vreg->ocp_count <= vreg->ocp_max_retries) {
916 /* Schedule the over current clear task to run later. */
917 schedule_delayed_work(&vreg->ocp_work,
918 msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
919 } else {
920 dev_err(vreg->dev,
921 "OCP triggered %d times; no further retries\n",
922 vreg->ocp_count);
923 }
924
925 return IRQ_HANDLED;
926}
927
928static struct regulator_ops spmi_smps_ops = {
929 .enable = spmi_regulator_common_enable,
930 .disable = spmi_regulator_common_disable,
931 .is_enabled = spmi_regulator_common_is_enabled,
932 .set_voltage = spmi_regulator_common_set_voltage,
933 .get_voltage = spmi_regulator_common_get_voltage,
934 .list_voltage = spmi_regulator_common_list_voltage,
935 .set_mode = spmi_regulator_common_set_mode,
936 .get_mode = spmi_regulator_common_get_mode,
937 .set_load = spmi_regulator_common_set_load,
938 .set_pull_down = spmi_regulator_common_set_pull_down,
939};
940
941static struct regulator_ops spmi_ldo_ops = {
942 .enable = spmi_regulator_common_enable,
943 .disable = spmi_regulator_common_disable,
944 .is_enabled = spmi_regulator_common_is_enabled,
945 .set_voltage = spmi_regulator_common_set_voltage,
946 .get_voltage = spmi_regulator_common_get_voltage,
947 .list_voltage = spmi_regulator_common_list_voltage,
948 .set_mode = spmi_regulator_common_set_mode,
949 .get_mode = spmi_regulator_common_get_mode,
950 .set_load = spmi_regulator_common_set_load,
951 .set_bypass = spmi_regulator_common_set_bypass,
952 .get_bypass = spmi_regulator_common_get_bypass,
953 .set_pull_down = spmi_regulator_common_set_pull_down,
954 .set_soft_start = spmi_regulator_common_set_soft_start,
955};
956
957static struct regulator_ops spmi_ln_ldo_ops = {
958 .enable = spmi_regulator_common_enable,
959 .disable = spmi_regulator_common_disable,
960 .is_enabled = spmi_regulator_common_is_enabled,
961 .set_voltage = spmi_regulator_common_set_voltage,
962 .get_voltage = spmi_regulator_common_get_voltage,
963 .list_voltage = spmi_regulator_common_list_voltage,
964 .set_bypass = spmi_regulator_common_set_bypass,
965 .get_bypass = spmi_regulator_common_get_bypass,
966};
967
968static struct regulator_ops spmi_vs_ops = {
969 .enable = spmi_regulator_vs_enable,
970 .disable = spmi_regulator_common_disable,
971 .is_enabled = spmi_regulator_common_is_enabled,
972 .set_pull_down = spmi_regulator_common_set_pull_down,
973 .set_soft_start = spmi_regulator_common_set_soft_start,
974};
975
976static struct regulator_ops spmi_boost_ops = {
977 .enable = spmi_regulator_common_enable,
978 .disable = spmi_regulator_common_disable,
979 .is_enabled = spmi_regulator_common_is_enabled,
980 .set_voltage = spmi_regulator_single_range_set_voltage,
981 .get_voltage = spmi_regulator_single_range_get_voltage,
982 .list_voltage = spmi_regulator_common_list_voltage,
983 .set_input_current_limit = spmi_regulator_set_ilim,
984};
985
986static struct regulator_ops spmi_ftsmps_ops = {
987 .enable = spmi_regulator_common_enable,
988 .disable = spmi_regulator_common_disable,
989 .is_enabled = spmi_regulator_common_is_enabled,
990 .set_voltage = spmi_regulator_common_set_voltage,
991 .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel,
992 .get_voltage = spmi_regulator_common_get_voltage,
993 .list_voltage = spmi_regulator_common_list_voltage,
994 .set_mode = spmi_regulator_common_set_mode,
995 .get_mode = spmi_regulator_common_get_mode,
996 .set_load = spmi_regulator_common_set_load,
997 .set_pull_down = spmi_regulator_common_set_pull_down,
998};
999
1000static struct regulator_ops spmi_ult_lo_smps_ops = {
1001 .enable = spmi_regulator_common_enable,
1002 .disable = spmi_regulator_common_disable,
1003 .is_enabled = spmi_regulator_common_is_enabled,
1004 .set_voltage = spmi_regulator_ult_lo_smps_set_voltage,
1005 .get_voltage = spmi_regulator_ult_lo_smps_get_voltage,
1006 .list_voltage = spmi_regulator_common_list_voltage,
1007 .set_mode = spmi_regulator_common_set_mode,
1008 .get_mode = spmi_regulator_common_get_mode,
1009 .set_load = spmi_regulator_common_set_load,
1010 .set_pull_down = spmi_regulator_common_set_pull_down,
1011};
1012
1013static struct regulator_ops spmi_ult_ho_smps_ops = {
1014 .enable = spmi_regulator_common_enable,
1015 .disable = spmi_regulator_common_disable,
1016 .is_enabled = spmi_regulator_common_is_enabled,
1017 .set_voltage = spmi_regulator_single_range_set_voltage,
1018 .get_voltage = spmi_regulator_single_range_get_voltage,
1019 .list_voltage = spmi_regulator_common_list_voltage,
1020 .set_mode = spmi_regulator_common_set_mode,
1021 .get_mode = spmi_regulator_common_get_mode,
1022 .set_load = spmi_regulator_common_set_load,
1023 .set_pull_down = spmi_regulator_common_set_pull_down,
1024};
1025
1026static struct regulator_ops spmi_ult_ldo_ops = {
1027 .enable = spmi_regulator_common_enable,
1028 .disable = spmi_regulator_common_disable,
1029 .is_enabled = spmi_regulator_common_is_enabled,
1030 .set_voltage = spmi_regulator_single_range_set_voltage,
1031 .get_voltage = spmi_regulator_single_range_get_voltage,
1032 .list_voltage = spmi_regulator_common_list_voltage,
1033 .set_mode = spmi_regulator_common_set_mode,
1034 .get_mode = spmi_regulator_common_get_mode,
1035 .set_load = spmi_regulator_common_set_load,
1036 .set_bypass = spmi_regulator_common_set_bypass,
1037 .get_bypass = spmi_regulator_common_get_bypass,
1038 .set_pull_down = spmi_regulator_common_set_pull_down,
1039 .set_soft_start = spmi_regulator_common_set_soft_start,
1040};
1041
1042/* Maximum possible digital major revision value */
1043#define INF 0xFF
1044
1045static const struct spmi_regulator_mapping supported_regulators[] = {
1046 /* type subtype dig_min dig_max ltype ops setpoints hpm_min */
1047 SPMI_VREG(BUCK, GP_CTL, 0, INF, SMPS, smps, smps, 100000),
1048 SPMI_VREG(LDO, N300, 0, INF, LDO, ldo, nldo1, 10000),
1049 SPMI_VREG(LDO, N600, 0, 0, LDO, ldo, nldo2, 10000),
1050 SPMI_VREG(LDO, N1200, 0, 0, LDO, ldo, nldo2, 10000),
1051 SPMI_VREG(LDO, N600, 1, INF, LDO, ldo, nldo3, 10000),
1052 SPMI_VREG(LDO, N1200, 1, INF, LDO, ldo, nldo3, 10000),
1053 SPMI_VREG(LDO, N600_ST, 0, 0, LDO, ldo, nldo2, 10000),
1054 SPMI_VREG(LDO, N1200_ST, 0, 0, LDO, ldo, nldo2, 10000),
1055 SPMI_VREG(LDO, N600_ST, 1, INF, LDO, ldo, nldo3, 10000),
1056 SPMI_VREG(LDO, N1200_ST, 1, INF, LDO, ldo, nldo3, 10000),
1057 SPMI_VREG(LDO, P50, 0, INF, LDO, ldo, pldo, 5000),
1058 SPMI_VREG(LDO, P150, 0, INF, LDO, ldo, pldo, 10000),
1059 SPMI_VREG(LDO, P300, 0, INF, LDO, ldo, pldo, 10000),
1060 SPMI_VREG(LDO, P600, 0, INF, LDO, ldo, pldo, 10000),
1061 SPMI_VREG(LDO, P1200, 0, INF, LDO, ldo, pldo, 10000),
1062 SPMI_VREG(LDO, LN, 0, INF, LN_LDO, ln_ldo, ln_ldo, 0),
1063 SPMI_VREG(LDO, LV_P50, 0, INF, LDO, ldo, pldo, 5000),
1064 SPMI_VREG(LDO, LV_P150, 0, INF, LDO, ldo, pldo, 10000),
1065 SPMI_VREG(LDO, LV_P300, 0, INF, LDO, ldo, pldo, 10000),
1066 SPMI_VREG(LDO, LV_P600, 0, INF, LDO, ldo, pldo, 10000),
1067 SPMI_VREG(LDO, LV_P1200, 0, INF, LDO, ldo, pldo, 10000),
1068 SPMI_VREG_VS(LV100, 0, INF),
1069 SPMI_VREG_VS(LV300, 0, INF),
1070 SPMI_VREG_VS(MV300, 0, INF),
1071 SPMI_VREG_VS(MV500, 0, INF),
1072 SPMI_VREG_VS(HDMI, 0, INF),
1073 SPMI_VREG_VS(OTG, 0, INF),
1074 SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST, boost, boost, 0),
1075 SPMI_VREG(FTS, FTS_CTL, 0, INF, FTSMPS, ftsmps, ftsmps, 100000),
1076 SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
1077 SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
1078 SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1079 ult_lo_smps, 100000),
1080 SPMI_VREG(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1081 ult_lo_smps, 100000),
1082 SPMI_VREG(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1083 ult_lo_smps, 100000),
1084 SPMI_VREG(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps,
1085 ult_ho_smps, 100000),
1086 SPMI_VREG(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1087 SPMI_VREG(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1088 SPMI_VREG(ULT_LDO, N900_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1089 SPMI_VREG(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1090 SPMI_VREG(ULT_LDO, LV_P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1091 SPMI_VREG(ULT_LDO, LV_P300, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1092 SPMI_VREG(ULT_LDO, LV_P450, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1093 SPMI_VREG(ULT_LDO, P600, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1094 SPMI_VREG(ULT_LDO, P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1095 SPMI_VREG(ULT_LDO, P50, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000),
1096};
1097
1098static void spmi_calculate_num_voltages(struct spmi_voltage_set_points *points)
1099{
1100 unsigned int n;
1101 struct spmi_voltage_range *range = points->range;
1102
1103 for (; range < points->range + points->count; range++) {
1104 n = 0;
1105 if (range->set_point_max_uV) {
1106 n = range->set_point_max_uV - range->set_point_min_uV;
1107 n /= range->step_uV + 1;
1108 }
1109 range->n_voltages = n;
1110 points->n_voltages += n;
1111 }
1112}
1113
1114static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
1115{
1116 const struct spmi_regulator_mapping *mapping;
1117 int ret, i;
1118 u32 dig_major_rev;
1119 u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1];
1120 u8 type, subtype;
1121
1122 ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version,
1123 ARRAY_SIZE(version));
1124 if (ret) {
1125 dev_err(vreg->dev, "could not read version registers\n");
1126 return ret;
1127 }
1128 dig_major_rev = version[SPMI_COMMON_REG_DIG_MAJOR_REV
1129 - SPMI_COMMON_REG_DIG_MAJOR_REV];
1130 if (!force_type) {
1131 type = version[SPMI_COMMON_REG_TYPE -
1132 SPMI_COMMON_REG_DIG_MAJOR_REV];
1133 subtype = version[SPMI_COMMON_REG_SUBTYPE -
1134 SPMI_COMMON_REG_DIG_MAJOR_REV];
1135 } else {
1136 type = force_type >> 8;
1137 subtype = force_type;
1138 }
1139
1140 for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) {
1141 mapping = &supported_regulators[i];
1142 if (mapping->type == type && mapping->subtype == subtype
1143 && mapping->revision_min <= dig_major_rev
1144 && mapping->revision_max >= dig_major_rev)
1145 goto found;
1146 }
1147
1148 dev_err(vreg->dev,
1149 "unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n",
1150 vreg->desc.name, type, subtype, dig_major_rev);
1151
1152 return -ENODEV;
1153
1154found:
1155 vreg->logical_type = mapping->logical_type;
1156 vreg->set_points = mapping->set_points;
1157 vreg->hpm_min_load = mapping->hpm_min_load;
1158 vreg->desc.ops = mapping->ops;
1159
1160 if (mapping->set_points) {
1161 if (!mapping->set_points->n_voltages)
1162 spmi_calculate_num_voltages(mapping->set_points);
1163 vreg->desc.n_voltages = mapping->set_points->n_voltages;
1164 }
1165
1166 return 0;
1167}
1168
1169static int spmi_regulator_ftsmps_init_slew_rate(struct spmi_regulator *vreg)
1170{
1171 int ret;
1172 u8 reg = 0;
1173 int step, delay, slew_rate;
1174 const struct spmi_voltage_range *range;
1175
1176 ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);
1177 if (ret) {
1178 dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
1179 return ret;
1180 }
1181
1182 range = spmi_regulator_find_range(vreg);
1183 if (!range)
1184 return -EINVAL;
1185
1186 step = reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK;
1187 step >>= SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT;
1188
1189 delay = reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK;
1190 delay >>= SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT;
1191
1192 /* slew_rate has units of uV/us */
1193 slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step);
1194 slew_rate /= 1000 * (SPMI_FTSMPS_STEP_DELAY << delay);
1195 slew_rate *= SPMI_FTSMPS_STEP_MARGIN_NUM;
1196 slew_rate /= SPMI_FTSMPS_STEP_MARGIN_DEN;
1197
1198 /* Ensure that the slew rate is greater than 0 */
1199 vreg->slew_rate = max(slew_rate, 1);
1200
1201 return ret;
1202}
1203
1204static unsigned int spmi_regulator_of_map_mode(unsigned int mode)
1205{
1206 if (mode)
1207 return REGULATOR_MODE_NORMAL;
1208
1209 return REGULATOR_MODE_IDLE;
1210}
1211
1212static int spmi_regulator_of_parse(struct device_node *node,
1213 const struct regulator_desc *desc,
1214 struct regulator_config *config)
1215{
1216 struct spmi_regulator *vreg = config->driver_data;
1217 struct device *dev = config->dev;
1218 int ret;
1219
1220 vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES;
1221 vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS;
1222
1223 if (vreg->logical_type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) {
1224 ret = spmi_regulator_ftsmps_init_slew_rate(vreg);
1225 if (ret)
1226 return ret;
1227 }
1228
1229 if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS)
1230 vreg->ocp_irq = 0;
1231
1232 if (vreg->ocp_irq) {
1233 ret = devm_request_irq(dev, vreg->ocp_irq,
1234 spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp",
1235 vreg);
1236 if (ret < 0) {
1237 dev_err(dev, "failed to request irq %d, ret=%d\n",
1238 vreg->ocp_irq, ret);
1239 return ret;
1240 }
1241
1242 INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work);
1243 }
1244
1245 return 0;
1246}
1247
1248static const struct spmi_regulator_data pm8941_regulators[] = {
1249 { "s1", 0x1400, "vdd_s1", },
1250 { "s2", 0x1700, "vdd_s2", },
1251 { "s3", 0x1a00, "vdd_s3", },
1252 { "l1", 0x4000, "vdd_l1_l3", },
1253 { "l2", 0x4100, "vdd_l2_lvs_1_2_3", },
1254 { "l3", 0x4200, "vdd_l1_l3", },
1255 { "l4", 0x4300, "vdd_l4_l11", },
1256 { "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 },
1257 { "l6", 0x4500, "vdd_l6_l12_l14_l15", },
1258 { "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 },
1259 { "l8", 0x4700, "vdd_l8_l16_l18_19", },
1260 { "l9", 0x4800, "vdd_l9_l10_l17_l22", },
1261 { "l10", 0x4900, "vdd_l9_l10_l17_l22", },
1262 { "l11", 0x4a00, "vdd_l4_l11", },
1263 { "l12", 0x4b00, "vdd_l6_l12_l14_l15", },
1264 { "l13", 0x4c00, "vdd_l13_l20_l23_l24", },
1265 { "l14", 0x4d00, "vdd_l6_l12_l14_l15", },
1266 { "l15", 0x4e00, "vdd_l6_l12_l14_l15", },
1267 { "l16", 0x4f00, "vdd_l8_l16_l18_19", },
1268 { "l17", 0x5000, "vdd_l9_l10_l17_l22", },
1269 { "l18", 0x5100, "vdd_l8_l16_l18_19", },
1270 { "l19", 0x5200, "vdd_l8_l16_l18_19", },
1271 { "l20", 0x5300, "vdd_l13_l20_l23_l24", },
1272 { "l21", 0x5400, "vdd_l21", },
1273 { "l22", 0x5500, "vdd_l9_l10_l17_l22", },
1274 { "l23", 0x5600, "vdd_l13_l20_l23_l24", },
1275 { "l24", 0x5700, "vdd_l13_l20_l23_l24", },
1276 { "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", },
1277 { "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", },
1278 { "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", },
1279 { "mvs1", 0x8300, "vin_5vs", },
1280 { "mvs2", 0x8400, "vin_5vs", },
1281 { }
1282};
1283
1284static const struct spmi_regulator_data pm8841_regulators[] = {
1285 { "s1", 0x1400, "vdd_s1", },
1286 { "s2", 0x1700, "vdd_s2", NULL, 0x1c08 },
1287 { "s3", 0x1a00, "vdd_s3", },
1288 { "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 },
1289 { "s5", 0x2000, "vdd_s5", NULL, 0x1c08 },
1290 { "s6", 0x2300, "vdd_s6", NULL, 0x1c08 },
1291 { "s7", 0x2600, "vdd_s7", NULL, 0x1c08 },
1292 { "s8", 0x2900, "vdd_s8", NULL, 0x1c08 },
1293 { }
1294};
1295
1296static const struct spmi_regulator_data pm8916_regulators[] = {
1297 { "s1", 0x1400, "vdd_s1", },
1298 { "s2", 0x1700, "vdd_s2", },
1299 { "s3", 0x1a00, "vdd_s3", },
1300 { "s4", 0x1d00, "vdd_s4", },
1301 { "l1", 0x4000, "vdd_l1_l3", },
1302 { "l2", 0x4100, "vdd_l2", },
1303 { "l3", 0x4200, "vdd_l1_l3", },
1304 { "l4", 0x4300, "vdd_l4_l5_l6", },
1305 { "l5", 0x4400, "vdd_l4_l5_l6", },
1306 { "l6", 0x4500, "vdd_l4_l5_l6", },
1307 { "l7", 0x4600, "vdd_l7", },
1308 { "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", },
1309 { "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", },
1310 { "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", },
1311 { "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", },
1312 { "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", },
1313 { "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", },
1314 { "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", },
1315 { "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", },
1316 { "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", },
1317 { "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", },
1318 { "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", },
1319 { }
1320};
1321
1322static const struct of_device_id qcom_spmi_regulator_match[] = {
1323 { .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
1324 { .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
1325 { .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
1326 { }
1327};
1328MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);
1329
1330static int qcom_spmi_regulator_probe(struct platform_device *pdev)
1331{
1332 const struct spmi_regulator_data *reg;
1333 const struct of_device_id *match;
1334 struct regulator_config config = { };
1335 struct regulator_dev *rdev;
1336 struct spmi_regulator *vreg;
1337 struct regmap *regmap;
1338 const char *name;
1339 struct device *dev = &pdev->dev;
1340 int ret;
1341 struct list_head *vreg_list;
1342
1343 vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
1344 if (!vreg_list)
1345 return -ENOMEM;
1346 INIT_LIST_HEAD(vreg_list);
1347 platform_set_drvdata(pdev, vreg_list);
1348
1349 regmap = dev_get_regmap(dev->parent, NULL);
1350 if (!regmap)
1351 return -ENODEV;
1352
1353 match = of_match_device(qcom_spmi_regulator_match, &pdev->dev);
1354 if (!match)
1355 return -ENODEV;
1356
1357 for (reg = match->data; reg->name; reg++) {
1358 vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
1359 if (!vreg)
1360 return -ENOMEM;
1361
1362 vreg->dev = dev;
1363 vreg->base = reg->base;
1364 vreg->regmap = regmap;
1365
1366 if (reg->ocp) {
1367 vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
1368 if (vreg->ocp_irq < 0) {
1369 ret = vreg->ocp_irq;
1370 goto err;
1371 }
1372 }
1373
1374 vreg->desc.id = -1;
1375 vreg->desc.owner = THIS_MODULE;
1376 vreg->desc.type = REGULATOR_VOLTAGE;
1377 vreg->desc.name = name = reg->name;
1378 vreg->desc.supply_name = reg->supply;
1379 vreg->desc.of_match = reg->name;
1380 vreg->desc.of_parse_cb = spmi_regulator_of_parse;
1381 vreg->desc.of_map_mode = spmi_regulator_of_map_mode;
1382
1383 ret = spmi_regulator_match(vreg, reg->force_type);
1384 if (ret)
1385 goto err;
1386
1387 config.dev = dev;
1388 config.driver_data = vreg;
1389 rdev = devm_regulator_register(dev, &vreg->desc, &config);
1390 if (IS_ERR(rdev)) {
1391 dev_err(dev, "failed to register %s\n", name);
1392 ret = PTR_ERR(rdev);
1393 goto err;
1394 }
1395
1396 INIT_LIST_HEAD(&vreg->node);
1397 list_add(&vreg->node, vreg_list);
1398 }
1399
1400 return 0;
1401
1402err:
1403 list_for_each_entry(vreg, vreg_list, node)
1404 if (vreg->ocp_irq)
1405 cancel_delayed_work_sync(&vreg->ocp_work);
1406 return ret;
1407}
1408
1409static int qcom_spmi_regulator_remove(struct platform_device *pdev)
1410{
1411 struct spmi_regulator *vreg;
1412 struct list_head *vreg_list = platform_get_drvdata(pdev);
1413
1414 list_for_each_entry(vreg, vreg_list, node)
1415 if (vreg->ocp_irq)
1416 cancel_delayed_work_sync(&vreg->ocp_work);
1417
1418 return 0;
1419}
1420
1421static struct platform_driver qcom_spmi_regulator_driver = {
1422 .driver = {
1423 .name = "qcom-spmi-regulator",
1424 .of_match_table = qcom_spmi_regulator_match,
1425 },
1426 .probe = qcom_spmi_regulator_probe,
1427 .remove = qcom_spmi_regulator_remove,
1428};
1429module_platform_driver(qcom_spmi_regulator_driver);
1430
1431MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver");
1432MODULE_LICENSE("GPL v2");
1433MODULE_ALIAS("platform:qcom-spmi-regulator");
Linux kernel - Deliverables
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