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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 /* Pin control enable input pins. */
30 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_NONE             0x00
31 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN0              0x01
32 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN1              0x02
33 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN2              0x04
34 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN3              0x08
35 #define SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT       0x10
36
37 /* Pin control high power mode input pins. */
38 #define SPMI_REGULATOR_PIN_CTRL_HPM_NONE                0x00
39 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN0                 0x01
40 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN1                 0x02
41 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN2                 0x04
42 #define SPMI_REGULATOR_PIN_CTRL_HPM_EN3                 0x08
43 #define SPMI_REGULATOR_PIN_CTRL_HPM_SLEEP_B             0x10
44 #define SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT          0x20
45
46 /*
47  * Used with enable parameters to specify that hardware default register values
48  * should be left unaltered.
49  */
50 #define SPMI_REGULATOR_USE_HW_DEFAULT                   2
51
52 /* Soft start strength of a voltage switch type regulator */
53 enum spmi_vs_soft_start_str {
54         SPMI_VS_SOFT_START_STR_0P05_UA = 0,
55         SPMI_VS_SOFT_START_STR_0P25_UA,
56         SPMI_VS_SOFT_START_STR_0P55_UA,
57         SPMI_VS_SOFT_START_STR_0P75_UA,
58         SPMI_VS_SOFT_START_STR_HW_DEFAULT,
59 };
60
61 /**
62  * struct spmi_regulator_init_data - spmi-regulator initialization data
63  * @pin_ctrl_enable:        Bit mask specifying which hardware pins should be
64  *                              used to enable the regulator, if any
65  *                          Value should be an ORing of
66  *                              SPMI_REGULATOR_PIN_CTRL_ENABLE_* constants.  If
67  *                              the bit specified by
68  *                              SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT is
69  *                              set, then pin control enable hardware registers
70  *                              will not be modified.
71  * @pin_ctrl_hpm:           Bit mask specifying which hardware pins should be
72  *                              used to force the regulator into high power
73  *                              mode, if any
74  *                          Value should be an ORing of
75  *                              SPMI_REGULATOR_PIN_CTRL_HPM_* constants.  If
76  *                              the bit specified by
77  *                              SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT is
78  *                              set, then pin control mode hardware registers
79  *                              will not be modified.
80  * @vs_soft_start_strength: This parameter sets the soft start strength for
81  *                              voltage switch type regulators.  Its value
82  *                              should be one of SPMI_VS_SOFT_START_STR_*.  If
83  *                              its value is SPMI_VS_SOFT_START_STR_HW_DEFAULT,
84  *                              then the soft start strength will be left at its
85  *                              default hardware value.
86  */
87 struct spmi_regulator_init_data {
88         unsigned                                pin_ctrl_enable;
89         unsigned                                pin_ctrl_hpm;
90         enum spmi_vs_soft_start_str             vs_soft_start_strength;
91 };
92
93 /* These types correspond to unique register layouts. */
94 enum spmi_regulator_logical_type {
95         SPMI_REGULATOR_LOGICAL_TYPE_SMPS,
96         SPMI_REGULATOR_LOGICAL_TYPE_LDO,
97         SPMI_REGULATOR_LOGICAL_TYPE_VS,
98         SPMI_REGULATOR_LOGICAL_TYPE_BOOST,
99         SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS,
100         SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP,
101         SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO,
102         SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
103         SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
104         SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
105 };
106
107 enum spmi_regulator_type {
108         SPMI_REGULATOR_TYPE_BUCK                = 0x03,
109         SPMI_REGULATOR_TYPE_LDO                 = 0x04,
110         SPMI_REGULATOR_TYPE_VS                  = 0x05,
111         SPMI_REGULATOR_TYPE_BOOST               = 0x1b,
112         SPMI_REGULATOR_TYPE_FTS                 = 0x1c,
113         SPMI_REGULATOR_TYPE_BOOST_BYP           = 0x1f,
114         SPMI_REGULATOR_TYPE_ULT_LDO             = 0x21,
115         SPMI_REGULATOR_TYPE_ULT_BUCK            = 0x22,
116 };
117
118 enum spmi_regulator_subtype {
119         SPMI_REGULATOR_SUBTYPE_GP_CTL           = 0x08,
120         SPMI_REGULATOR_SUBTYPE_RF_CTL           = 0x09,
121         SPMI_REGULATOR_SUBTYPE_N50              = 0x01,
122         SPMI_REGULATOR_SUBTYPE_N150             = 0x02,
123         SPMI_REGULATOR_SUBTYPE_N300             = 0x03,
124         SPMI_REGULATOR_SUBTYPE_N600             = 0x04,
125         SPMI_REGULATOR_SUBTYPE_N1200            = 0x05,
126         SPMI_REGULATOR_SUBTYPE_N600_ST          = 0x06,
127         SPMI_REGULATOR_SUBTYPE_N1200_ST         = 0x07,
128         SPMI_REGULATOR_SUBTYPE_N900_ST          = 0x14,
129         SPMI_REGULATOR_SUBTYPE_N300_ST          = 0x15,
130         SPMI_REGULATOR_SUBTYPE_P50              = 0x08,
131         SPMI_REGULATOR_SUBTYPE_P150             = 0x09,
132         SPMI_REGULATOR_SUBTYPE_P300             = 0x0a,
133         SPMI_REGULATOR_SUBTYPE_P600             = 0x0b,
134         SPMI_REGULATOR_SUBTYPE_P1200            = 0x0c,
135         SPMI_REGULATOR_SUBTYPE_LN               = 0x10,
136         SPMI_REGULATOR_SUBTYPE_LV_P50           = 0x28,
137         SPMI_REGULATOR_SUBTYPE_LV_P150          = 0x29,
138         SPMI_REGULATOR_SUBTYPE_LV_P300          = 0x2a,
139         SPMI_REGULATOR_SUBTYPE_LV_P600          = 0x2b,
140         SPMI_REGULATOR_SUBTYPE_LV_P1200         = 0x2c,
141         SPMI_REGULATOR_SUBTYPE_LV_P450          = 0x2d,
142         SPMI_REGULATOR_SUBTYPE_LV100            = 0x01,
143         SPMI_REGULATOR_SUBTYPE_LV300            = 0x02,
144         SPMI_REGULATOR_SUBTYPE_MV300            = 0x08,
145         SPMI_REGULATOR_SUBTYPE_MV500            = 0x09,
146         SPMI_REGULATOR_SUBTYPE_HDMI             = 0x10,
147         SPMI_REGULATOR_SUBTYPE_OTG              = 0x11,
148         SPMI_REGULATOR_SUBTYPE_5V_BOOST         = 0x01,
149         SPMI_REGULATOR_SUBTYPE_FTS_CTL          = 0x08,
150         SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL       = 0x09,
151         SPMI_REGULATOR_SUBTYPE_BB_2A            = 0x01,
152         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1      = 0x0d,
153         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2      = 0x0e,
154         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3      = 0x0f,
155         SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4      = 0x10,
156 };
157
158 enum spmi_common_regulator_registers {
159         SPMI_COMMON_REG_DIG_MAJOR_REV           = 0x01,
160         SPMI_COMMON_REG_TYPE                    = 0x04,
161         SPMI_COMMON_REG_SUBTYPE                 = 0x05,
162         SPMI_COMMON_REG_VOLTAGE_RANGE           = 0x40,
163         SPMI_COMMON_REG_VOLTAGE_SET             = 0x41,
164         SPMI_COMMON_REG_MODE                    = 0x45,
165         SPMI_COMMON_REG_ENABLE                  = 0x46,
166         SPMI_COMMON_REG_PULL_DOWN               = 0x48,
167         SPMI_COMMON_REG_SOFT_START              = 0x4c,
168         SPMI_COMMON_REG_STEP_CTRL               = 0x61,
169 };
170
171 enum spmi_vs_registers {
172         SPMI_VS_REG_OCP                         = 0x4a,
173         SPMI_VS_REG_SOFT_START                  = 0x4c,
174 };
175
176 enum spmi_boost_registers {
177         SPMI_BOOST_REG_CURRENT_LIMIT            = 0x4a,
178 };
179
180 enum spmi_boost_byp_registers {
181         SPMI_BOOST_BYP_REG_CURRENT_LIMIT        = 0x4b,
182 };
183
184 /* Used for indexing into ctrl_reg.  These are offets from 0x40 */
185 enum spmi_common_control_register_index {
186         SPMI_COMMON_IDX_VOLTAGE_RANGE           = 0,
187         SPMI_COMMON_IDX_VOLTAGE_SET             = 1,
188         SPMI_COMMON_IDX_MODE                    = 5,
189         SPMI_COMMON_IDX_ENABLE                  = 6,
190 };
191
192 /* Common regulator control register layout */
193 #define SPMI_COMMON_ENABLE_MASK                 0x80
194 #define SPMI_COMMON_ENABLE                      0x80
195 #define SPMI_COMMON_DISABLE                     0x00
196 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK   0x08
197 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK   0x04
198 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK   0x02
199 #define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK   0x01
200 #define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK      0x0f
201
202 /* Common regulator mode register layout */
203 #define SPMI_COMMON_MODE_HPM_MASK               0x80
204 #define SPMI_COMMON_MODE_AUTO_MASK              0x40
205 #define SPMI_COMMON_MODE_BYPASS_MASK            0x20
206 #define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK      0x10
207 #define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK     0x08
208 #define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK     0x04
209 #define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK     0x02
210 #define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK     0x01
211 #define SPMI_COMMON_MODE_FOLLOW_ALL_MASK        0x1f
212
213 /* Common regulator pull down control register layout */
214 #define SPMI_COMMON_PULL_DOWN_ENABLE_MASK       0x80
215
216 /* LDO regulator current limit control register layout */
217 #define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK      0x80
218
219 /* LDO regulator soft start control register layout */
220 #define SPMI_LDO_SOFT_START_ENABLE_MASK         0x80
221
222 /* VS regulator over current protection control register layout */
223 #define SPMI_VS_OCP_OVERRIDE                    0x01
224 #define SPMI_VS_OCP_NO_OVERRIDE                 0x00
225
226 /* VS regulator soft start control register layout */
227 #define SPMI_VS_SOFT_START_ENABLE_MASK          0x80
228 #define SPMI_VS_SOFT_START_SEL_MASK             0x03
229
230 /* Boost regulator current limit control register layout */
231 #define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK    0x80
232 #define SPMI_BOOST_CURRENT_LIMIT_MASK           0x07
233
234 #define SPMI_VS_OCP_DEFAULT_MAX_RETRIES         10
235 #define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS      30
236 #define SPMI_VS_OCP_FALL_DELAY_US               90
237 #define SPMI_VS_OCP_FAULT_DELAY_US              20000
238
239 #define SPMI_FTSMPS_STEP_CTRL_STEP_MASK         0x18
240 #define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT        3
241 #define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK        0x07
242 #define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT       0
243
244 /* Clock rate in kHz of the FTSMPS regulator reference clock. */
245 #define SPMI_FTSMPS_CLOCK_RATE          19200
246
247 /* Minimum voltage stepper delay for each step. */
248 #define SPMI_FTSMPS_STEP_DELAY          8
249
250 /*
251  * The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to
252  * adjust the step rate in order to account for oscillator variance.
253  */
254 #define SPMI_FTSMPS_STEP_MARGIN_NUM     4
255 #define SPMI_FTSMPS_STEP_MARGIN_DEN     5
256
257 /*
258  * This voltage in uV is returned by get_voltage functions when there is no way
259  * to determine the current voltage level.  It is needed because the regulator
260  * framework treats a 0 uV voltage as an error.
261  */
262 #define VOLTAGE_UNKNOWN 1
263
264 /* VSET value to decide the range of ULT SMPS */
265 #define ULT_SMPS_RANGE_SPLIT 0x60
266
267 /**
268  * struct spmi_voltage_range - regulator set point voltage mapping description
269  * @min_uV:             Minimum programmable output voltage resulting from
270  *                      set point register value 0x00
271  * @max_uV:             Maximum programmable output voltage
272  * @step_uV:            Output voltage increase resulting from the set point
273  *                      register value increasing by 1
274  * @set_point_min_uV:   Minimum allowed voltage
275  * @set_point_max_uV:   Maximum allowed voltage.  This may be tweaked in order
276  *                      to pick which range should be used in the case of
277  *                      overlapping set points.
278  * @n_voltages:         Number of preferred voltage set points present in this
279  *                      range
280  * @range_sel:          Voltage range register value corresponding to this range
281  *
282  * The following relationships must be true for the values used in this struct:
283  * (max_uV - min_uV) % step_uV == 0
284  * (set_point_min_uV - min_uV) % step_uV == 0*
285  * (set_point_max_uV - min_uV) % step_uV == 0*
286  * n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1
287  *
288  * *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to
289  * specify that the voltage range has meaning, but is not preferred.
290  */
291 struct spmi_voltage_range {
292         int                                     min_uV;
293         int                                     max_uV;
294         int                                     step_uV;
295         int                                     set_point_min_uV;
296         int                                     set_point_max_uV;
297         unsigned                                n_voltages;
298         u8                                      range_sel;
299 };
300
301 /*
302  * The ranges specified in the spmi_voltage_set_points struct must be listed
303  * so that range[i].set_point_max_uV < range[i+1].set_point_min_uV.
304  */
305 struct spmi_voltage_set_points {
306         struct spmi_voltage_range               *range;
307         int                                     count;
308         unsigned                                n_voltages;
309 };
310
311 struct spmi_regulator {
312         struct regulator_desc                   desc;
313         struct device                           *dev;
314         struct delayed_work                     ocp_work;
315         struct regmap                           *regmap;
316         struct spmi_voltage_set_points          *set_points;
317         enum spmi_regulator_logical_type        logical_type;
318         int                                     ocp_irq;
319         int                                     ocp_count;
320         int                                     ocp_max_retries;
321         int                                     ocp_retry_delay_ms;
322         int                                     hpm_min_load;
323         int                                     slew_rate;
324         ktime_t                                 vs_enable_time;
325         u16                                     base;
326         struct list_head                        node;
327 };
328
329 struct spmi_regulator_mapping {
330         enum spmi_regulator_type                type;
331         enum spmi_regulator_subtype             subtype;
332         enum spmi_regulator_logical_type        logical_type;
333         u32                                     revision_min;
334         u32                                     revision_max;
335         struct regulator_ops                    *ops;
336         struct spmi_voltage_set_points          *set_points;
337         int                                     hpm_min_load;
338 };
339
340 struct spmi_regulator_data {
341         const char                      *name;
342         u16                             base;
343         const char                      *supply;
344         const char                      *ocp;
345         u16                             force_type;
346 };
347
348 #define SPMI_VREG(_type, _subtype, _dig_major_min, _dig_major_max, \
349                       _logical_type, _ops_val, _set_points_val, _hpm_min_load) \
350         { \
351                 .type           = SPMI_REGULATOR_TYPE_##_type, \
352                 .subtype        = SPMI_REGULATOR_SUBTYPE_##_subtype, \
353                 .revision_min   = _dig_major_min, \
354                 .revision_max   = _dig_major_max, \
355                 .logical_type   = SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \
356                 .ops            = &spmi_##_ops_val##_ops, \
357                 .set_points     = &_set_points_val##_set_points, \
358                 .hpm_min_load   = _hpm_min_load, \
359         }
360
361 #define SPMI_VREG_VS(_subtype, _dig_major_min, _dig_major_max) \
362         { \
363                 .type           = SPMI_REGULATOR_TYPE_VS, \
364                 .subtype        = SPMI_REGULATOR_SUBTYPE_##_subtype, \
365                 .revision_min   = _dig_major_min, \
366                 .revision_max   = _dig_major_max, \
367                 .logical_type   = SPMI_REGULATOR_LOGICAL_TYPE_VS, \
368                 .ops            = &spmi_vs_ops, \
369         }
370
371 #define SPMI_VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \
372                         _set_point_max_uV, _max_uV, _step_uV) \
373         { \
374                 .min_uV                 = _min_uV, \
375                 .max_uV                 = _max_uV, \
376                 .set_point_min_uV       = _set_point_min_uV, \
377                 .set_point_max_uV       = _set_point_max_uV, \
378                 .step_uV                = _step_uV, \
379                 .range_sel              = _range_sel, \
380         }
381
382 #define DEFINE_SPMI_SET_POINTS(name) \
383 struct spmi_voltage_set_points name##_set_points = { \
384         .range  = name##_ranges, \
385         .count  = ARRAY_SIZE(name##_ranges), \
386 }
387
388 /*
389  * These tables contain the physically available PMIC regulator voltage setpoint
390  * ranges.  Where two ranges overlap in hardware, one of the ranges is trimmed
391  * to ensure that the setpoints available to software are monotonically
392  * increasing and unique.  The set_voltage callback functions expect these
393  * properties to hold.
394  */
395 static struct spmi_voltage_range pldo_ranges[] = {
396         SPMI_VOLTAGE_RANGE(2,  750000,  750000, 1537500, 1537500, 12500),
397         SPMI_VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000),
398         SPMI_VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000),
399 };
400
401 static struct spmi_voltage_range nldo1_ranges[] = {
402         SPMI_VOLTAGE_RANGE(2,  750000,  750000, 1537500, 1537500, 12500),
403 };
404
405 static struct spmi_voltage_range nldo2_ranges[] = {
406         SPMI_VOLTAGE_RANGE(0,  375000,       0,       0, 1537500, 12500),
407         SPMI_VOLTAGE_RANGE(1,  375000,  375000,  768750,  768750,  6250),
408         SPMI_VOLTAGE_RANGE(2,  750000,  775000, 1537500, 1537500, 12500),
409 };
410
411 static struct spmi_voltage_range nldo3_ranges[] = {
412         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1537500, 1537500, 12500),
413         SPMI_VOLTAGE_RANGE(1,  375000,       0,       0, 1537500, 12500),
414         SPMI_VOLTAGE_RANGE(2,  750000,       0,       0, 1537500, 12500),
415 };
416
417 static struct spmi_voltage_range ln_ldo_ranges[] = {
418         SPMI_VOLTAGE_RANGE(1,  690000,  690000, 1110000, 1110000, 60000),
419         SPMI_VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000),
420 };
421
422 static struct spmi_voltage_range smps_ranges[] = {
423         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1562500, 1562500, 12500),
424         SPMI_VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000),
425 };
426
427 static struct spmi_voltage_range ftsmps_ranges[] = {
428         SPMI_VOLTAGE_RANGE(0,       0,  350000, 1275000, 1275000,  5000),
429         SPMI_VOLTAGE_RANGE(1,       0, 1280000, 2040000, 2040000, 10000),
430 };
431
432 static struct spmi_voltage_range ftsmps2p5_ranges[] = {
433         SPMI_VOLTAGE_RANGE(0,   80000,  350000, 1355000, 1355000,  5000),
434         SPMI_VOLTAGE_RANGE(1,  160000, 1360000, 2200000, 2200000, 10000),
435 };
436
437 static struct spmi_voltage_range boost_ranges[] = {
438         SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
439 };
440
441 static struct spmi_voltage_range boost_byp_ranges[] = {
442         SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
443 };
444
445 static struct spmi_voltage_range ult_lo_smps_ranges[] = {
446         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1562500, 1562500, 12500),
447         SPMI_VOLTAGE_RANGE(1,  750000,       0,       0, 1525000, 25000),
448 };
449
450 static struct spmi_voltage_range ult_ho_smps_ranges[] = {
451         SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
452 };
453
454 static struct spmi_voltage_range ult_nldo_ranges[] = {
455         SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1537500, 1537500, 12500),
456 };
457
458 static struct spmi_voltage_range ult_pldo_ranges[] = {
459         SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
460 };
461
462 static DEFINE_SPMI_SET_POINTS(pldo);
463 static DEFINE_SPMI_SET_POINTS(nldo1);
464 static DEFINE_SPMI_SET_POINTS(nldo2);
465 static DEFINE_SPMI_SET_POINTS(nldo3);
466 static DEFINE_SPMI_SET_POINTS(ln_ldo);
467 static DEFINE_SPMI_SET_POINTS(smps);
468 static DEFINE_SPMI_SET_POINTS(ftsmps);
469 static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
470 static DEFINE_SPMI_SET_POINTS(boost);
471 static DEFINE_SPMI_SET_POINTS(boost_byp);
472 static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
473 static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
474 static DEFINE_SPMI_SET_POINTS(ult_nldo);
475 static DEFINE_SPMI_SET_POINTS(ult_pldo);
476
477 static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf,
478                                  int len)
479 {
480         return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len);
481 }
482
483 static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr,
484                                 u8 *buf, int len)
485 {
486         return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len);
487 }
488
489 static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val,
490                 u8 mask)
491 {
492         return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val);
493 }
494
495 static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev)
496 {
497         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
498         u8 reg;
499
500         spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, &reg, 1);
501
502         return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE;
503 }
504
505 static int spmi_regulator_common_enable(struct regulator_dev *rdev)
506 {
507         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
508
509         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
510                 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
511 }
512
513 static int spmi_regulator_vs_enable(struct regulator_dev *rdev)
514 {
515         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
516
517         if (vreg->ocp_irq) {
518                 vreg->ocp_count = 0;
519                 vreg->vs_enable_time = ktime_get();
520         }
521
522         return spmi_regulator_common_enable(rdev);
523 }
524
525 static int spmi_regulator_vs_ocp(struct regulator_dev *rdev)
526 {
527         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
528         u8 reg = SPMI_VS_OCP_OVERRIDE;
529
530         return spmi_vreg_write(vreg, SPMI_VS_REG_OCP, &reg, 1);
531 }
532
533 static int spmi_regulator_common_disable(struct regulator_dev *rdev)
534 {
535         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
536
537         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
538                 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
539 }
540
541 static int spmi_regulator_select_voltage(struct spmi_regulator *vreg,
542                 int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
543                 unsigned *selector)
544 {
545         const struct spmi_voltage_range *range;
546         int uV = min_uV;
547         int lim_min_uV, lim_max_uV, i, range_id, range_max_uV;
548
549         /* Check if request voltage is outside of physically settable range. */
550         lim_min_uV = vreg->set_points->range[0].set_point_min_uV;
551         lim_max_uV =
552           vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV;
553
554         if (uV < lim_min_uV && max_uV >= lim_min_uV)
555                 uV = lim_min_uV;
556
557         if (uV < lim_min_uV || uV > lim_max_uV) {
558                 dev_err(vreg->dev,
559                         "request v=[%d, %d] is outside possible v=[%d, %d]\n",
560                          min_uV, max_uV, lim_min_uV, lim_max_uV);
561                 return -EINVAL;
562         }
563
564         /* Find the range which uV is inside of. */
565         for (i = vreg->set_points->count - 1; i > 0; i--) {
566                 range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV;
567                 if (uV > range_max_uV && range_max_uV > 0)
568                         break;
569         }
570
571         range_id = i;
572         range = &vreg->set_points->range[range_id];
573         *range_sel = range->range_sel;
574
575         /*
576          * Force uV to be an allowed set point by applying a ceiling function to
577          * the uV value.
578          */
579         *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
580         uV = *voltage_sel * range->step_uV + range->min_uV;
581
582         if (uV > max_uV) {
583                 dev_err(vreg->dev,
584                         "request v=[%d, %d] cannot be met by any set point; "
585                         "next set point: %d\n",
586                         min_uV, max_uV, uV);
587                 return -EINVAL;
588         }
589
590         *selector = 0;
591         for (i = 0; i < range_id; i++)
592                 *selector += vreg->set_points->range[i].n_voltages;
593         *selector += (uV - range->set_point_min_uV) / range->step_uV;
594
595         return 0;
596 }
597
598 static const struct spmi_voltage_range *
599 spmi_regulator_find_range(struct spmi_regulator *vreg)
600 {
601         u8 range_sel;
602         const struct spmi_voltage_range *range, *end;
603
604         range = vreg->set_points->range;
605         end = range + vreg->set_points->count;
606
607         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);
608
609         for (; range < end; range++)
610                 if (range->range_sel == range_sel)
611                         return range;
612
613         return NULL;
614 }
615
616 static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg,
617                 int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
618                 unsigned *selector)
619 {
620         const struct spmi_voltage_range *range;
621         int uV = min_uV;
622         int i;
623
624         range = spmi_regulator_find_range(vreg);
625         if (!range)
626                 goto different_range;
627
628         if (uV < range->min_uV && max_uV >= range->min_uV)
629                 uV = range->min_uV;
630
631         if (uV < range->min_uV || uV > range->max_uV) {
632                 /* Current range doesn't support the requested voltage. */
633                 goto different_range;
634         }
635
636         /*
637          * Force uV to be an allowed set point by applying a ceiling function to
638          * the uV value.
639          */
640         *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
641         uV = *voltage_sel * range->step_uV + range->min_uV;
642
643         if (uV > max_uV) {
644                 /*
645                  * No set point in the current voltage range is within the
646                  * requested min_uV to max_uV range.
647                  */
648                 goto different_range;
649         }
650
651         *selector = 0;
652         for (i = 0; i < vreg->set_points->count; i++) {
653                 if (uV >= vreg->set_points->range[i].set_point_min_uV
654                     && uV <= vreg->set_points->range[i].set_point_max_uV) {
655                         *selector +=
656                             (uV - vreg->set_points->range[i].set_point_min_uV)
657                                 / vreg->set_points->range[i].step_uV;
658                         break;
659                 }
660
661                 *selector += vreg->set_points->range[i].n_voltages;
662         }
663
664         if (*selector >= vreg->set_points->n_voltages)
665                 goto different_range;
666
667         return 0;
668
669 different_range:
670         return spmi_regulator_select_voltage(vreg, min_uV, max_uV,
671                         range_sel, voltage_sel, selector);
672 }
673
674 static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev,
675                 int min_uV, int max_uV, unsigned *selector)
676 {
677         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
678         int ret;
679         u8 buf[2];
680         u8 range_sel, voltage_sel;
681
682         /*
683          * Favor staying in the current voltage range if possible.  This avoids
684          * voltage spikes that occur when changing the voltage range.
685          */
686         ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
687                 &range_sel, &voltage_sel, selector);
688         if (ret)
689                 return ret;
690
691         buf[0] = range_sel;
692         buf[1] = voltage_sel;
693         return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
694 }
695
696 static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
697                 unsigned int old_selector, unsigned int new_selector)
698 {
699         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
700         const struct spmi_voltage_range *range;
701         int diff_uV;
702
703         range = spmi_regulator_find_range(vreg);
704         if (!range)
705                 return -EINVAL;
706
707         diff_uV = abs(new_selector - old_selector) * range->step_uV;
708
709         return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
710 }
711
712 static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
713 {
714         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
715         const struct spmi_voltage_range *range;
716         u8 voltage_sel;
717
718         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
719
720         range = spmi_regulator_find_range(vreg);
721         if (!range)
722                 return VOLTAGE_UNKNOWN;
723
724         return range->step_uV * voltage_sel + range->min_uV;
725 }
726
727 static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
728                 int min_uV, int max_uV, unsigned *selector)
729 {
730         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
731         int ret;
732         u8 range_sel, sel;
733
734         ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel,
735                 &sel, selector);
736         if (ret) {
737                 dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret);
738                 return ret;
739         }
740
741         /*
742          * Certain types of regulators do not have a range select register so
743          * only voltage set register needs to be written.
744          */
745         return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
746 }
747
748 static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
749 {
750         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
751         const struct spmi_voltage_range *range = vreg->set_points->range;
752         u8 voltage_sel;
753
754         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
755
756         return range->step_uV * voltage_sel + range->min_uV;
757 }
758
759 static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
760                 int min_uV, int max_uV, unsigned *selector)
761 {
762         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
763         int ret;
764         u8 range_sel, voltage_sel;
765
766         /*
767          * Favor staying in the current voltage range if possible. This avoids
768          * voltage spikes that occur when changing the voltage range.
769          */
770         ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
771                 &range_sel, &voltage_sel, selector);
772         if (ret)
773                 return ret;
774
775         /*
776          * Calculate VSET based on range
777          * In case of range 0: voltage_sel is a 7 bit value, can be written
778          *                      witout any modification.
779          * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
780          *                      [011].
781          */
782         if (range_sel == 1)
783                 voltage_sel |= ULT_SMPS_RANGE_SPLIT;
784
785         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
786                voltage_sel, 0xff);
787 }
788
789 static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
790 {
791         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
792         const struct spmi_voltage_range *range;
793         u8 voltage_sel;
794
795         spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
796
797         range = spmi_regulator_find_range(vreg);
798         if (!range)
799                 return VOLTAGE_UNKNOWN;
800
801         if (range->range_sel == 1)
802                 voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;
803
804         return range->step_uV * voltage_sel + range->min_uV;
805 }
806
807 static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
808                         unsigned selector)
809 {
810         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
811         int uV = 0;
812         int i;
813
814         if (selector >= vreg->set_points->n_voltages)
815                 return 0;
816
817         for (i = 0; i < vreg->set_points->count; i++) {
818                 if (selector < vreg->set_points->range[i].n_voltages) {
819                         uV = selector * vreg->set_points->range[i].step_uV
820                                 + vreg->set_points->range[i].set_point_min_uV;
821                         break;
822                 }
823
824                 selector -= vreg->set_points->range[i].n_voltages;
825         }
826
827         return uV;
828 }
829
830 static int
831 spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
832 {
833         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
834         u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
835         u8 val = 0;
836
837         if (enable)
838                 val = mask;
839
840         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
841 }
842
843 static int
844 spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
845 {
846         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
847         u8 val;
848         int ret;
849
850         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
851         *enable = val & SPMI_COMMON_MODE_BYPASS_MASK;
852
853         return ret;
854 }
855
856 static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
857 {
858         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
859         u8 reg;
860
861         spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);
862
863         if (reg & SPMI_COMMON_MODE_HPM_MASK)
864                 return REGULATOR_MODE_NORMAL;
865
866         if (reg & SPMI_COMMON_MODE_AUTO_MASK)
867                 return REGULATOR_MODE_FAST;
868
869         return REGULATOR_MODE_IDLE;
870 }
871
872 static int
873 spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
874 {
875         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
876         u8 mask = SPMI_COMMON_MODE_HPM_MASK | SPMI_COMMON_MODE_AUTO_MASK;
877         u8 val = 0;
878
879         if (mode == REGULATOR_MODE_NORMAL)
880                 val = SPMI_COMMON_MODE_HPM_MASK;
881         else if (mode == REGULATOR_MODE_FAST)
882                 val = SPMI_COMMON_MODE_AUTO_MASK;
883
884         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
885 }
886
887 static int
888 spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
889 {
890         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
891         unsigned int mode;
892
893         if (load_uA >= vreg->hpm_min_load)
894                 mode = REGULATOR_MODE_NORMAL;
895         else
896                 mode = REGULATOR_MODE_IDLE;
897
898         return spmi_regulator_common_set_mode(rdev, mode);
899 }
900
901 static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
902 {
903         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
904         unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;
905
906         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
907                                      mask, mask);
908 }
909
910 static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
911 {
912         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
913         unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;
914
915         return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
916                                      mask, mask);
917 }
918
919 static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
920 {
921         struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
922         enum spmi_regulator_logical_type type = vreg->logical_type;
923         unsigned int current_reg;
924         u8 reg;
925         u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
926                   SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
927         int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;
928
929         if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
930                 current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
931         else
932                 current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;
933
934         if (ilim_uA > max || ilim_uA <= 0)
935                 return -EINVAL;
936
937         reg = (ilim_uA - 1) / 500;
938         reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
939
940         return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
941 }
942
943 static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
944 {
945         int ret;
946
947         ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
948                 SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
949
950         vreg->vs_enable_time = ktime_get();
951
952         ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
953                 SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
954
955         return ret;
956 }
957
958 static void spmi_regulator_vs_ocp_work(struct work_struct *work)
959 {
960         struct delayed_work *dwork = to_delayed_work(work);
961         struct spmi_regulator *vreg
962                 = container_of(dwork, struct spmi_regulator, ocp_work);
963
964         spmi_regulator_vs_clear_ocp(vreg);
965 }
966
967 static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
968 {
969         struct spmi_regulator *vreg = data;
970         ktime_t ocp_irq_time;
971         s64 ocp_trigger_delay_us;
972
973         ocp_irq_time = ktime_get();
974         ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
975                                                 vreg->vs_enable_time);
976
977         /*
978          * Reset the OCP count if there is a large delay between switch enable
979          * and when OCP triggers.  This is indicative of a hotplug event as
980          * opposed to a fault.
981          */
982         if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
983                 vreg->ocp_count = 0;
984
985         /* Wait for switch output to settle back to 0 V after OCP triggered. */
986         udelay(SPMI_VS_OCP_FALL_DELAY_US);
987
988         vreg->ocp_count++;
989
990         if (vreg->ocp_count == 1) {
991                 /* Immediately clear the over current condition. */
992                 spmi_regulator_vs_clear_ocp(vreg);
993         } else if (vreg->ocp_count <= vreg->ocp_max_retries) {
994                 /* Schedule the over current clear task to run later. */
995                 schedule_delayed_work(&vreg->ocp_work,
996                         msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
997         } else {
998                 dev_err(vreg->dev,
999                         "OCP triggered %d times; no further retries\n",
1000                         vreg->ocp_count);
1001         }
1002
1003         return IRQ_HANDLED;
1004 }
1005
1006 static struct regulator_ops spmi_smps_ops = {
1007         .enable                 = spmi_regulator_common_enable,
1008         .disable                = spmi_regulator_common_disable,
1009         .is_enabled             = spmi_regulator_common_is_enabled,
1010         .set_voltage            = spmi_regulator_common_set_voltage,
1011         .get_voltage            = spmi_regulator_common_get_voltage,
1012         .list_voltage           = spmi_regulator_common_list_voltage,
1013         .set_mode               = spmi_regulator_common_set_mode,
1014         .get_mode               = spmi_regulator_common_get_mode,
1015         .set_load               = spmi_regulator_common_set_load,
1016         .set_pull_down          = spmi_regulator_common_set_pull_down,
1017 };
1018
1019 static struct regulator_ops spmi_ldo_ops = {
1020         .enable                 = spmi_regulator_common_enable,
1021         .disable                = spmi_regulator_common_disable,
1022         .is_enabled             = spmi_regulator_common_is_enabled,
1023         .set_voltage            = spmi_regulator_common_set_voltage,
1024         .get_voltage            = spmi_regulator_common_get_voltage,
1025         .list_voltage           = spmi_regulator_common_list_voltage,
1026         .set_mode               = spmi_regulator_common_set_mode,
1027         .get_mode               = spmi_regulator_common_get_mode,
1028         .set_load               = spmi_regulator_common_set_load,
1029         .set_bypass             = spmi_regulator_common_set_bypass,
1030         .get_bypass             = spmi_regulator_common_get_bypass,
1031         .set_pull_down          = spmi_regulator_common_set_pull_down,
1032         .set_soft_start         = spmi_regulator_common_set_soft_start,
1033 };
1034
1035 static struct regulator_ops spmi_ln_ldo_ops = {
1036         .enable                 = spmi_regulator_common_enable,
1037         .disable                = spmi_regulator_common_disable,
1038         .is_enabled             = spmi_regulator_common_is_enabled,
1039         .set_voltage            = spmi_regulator_common_set_voltage,
1040         .get_voltage            = spmi_regulator_common_get_voltage,
1041         .list_voltage           = spmi_regulator_common_list_voltage,
1042         .set_bypass             = spmi_regulator_common_set_bypass,
1043         .get_bypass             = spmi_regulator_common_get_bypass,
1044 };
1045
1046 static struct regulator_ops spmi_vs_ops = {
1047         .enable                 = spmi_regulator_vs_enable,
1048         .disable                = spmi_regulator_common_disable,
1049         .is_enabled             = spmi_regulator_common_is_enabled,
1050         .set_pull_down          = spmi_regulator_common_set_pull_down,
1051         .set_soft_start         = spmi_regulator_common_set_soft_start,
1052         .set_over_current_protection = spmi_regulator_vs_ocp,
1053 };
1054
1055 static struct regulator_ops spmi_boost_ops = {
1056         .enable                 = spmi_regulator_common_enable,
1057         .disable                = spmi_regulator_common_disable,
1058         .is_enabled             = spmi_regulator_common_is_enabled,
1059         .set_voltage            = spmi_regulator_single_range_set_voltage,
1060         .get_voltage            = spmi_regulator_single_range_get_voltage,
1061         .list_voltage           = spmi_regulator_common_list_voltage,
1062         .set_input_current_limit = spmi_regulator_set_ilim,
1063 };
1064
1065 static struct regulator_ops spmi_ftsmps_ops = {
1066         .enable                 = spmi_regulator_common_enable,
1067         .disable                = spmi_regulator_common_disable,
1068         .is_enabled             = spmi_regulator_common_is_enabled,
1069         .set_voltage            = spmi_regulator_common_set_voltage,
1070         .set_voltage_time_sel   = spmi_regulator_set_voltage_time_sel,
1071         .get_voltage            = spmi_regulator_common_get_voltage,
1072         .list_voltage           = spmi_regulator_common_list_voltage,
1073         .set_mode               = spmi_regulator_common_set_mode,
1074         .get_mode               = spmi_regulator_common_get_mode,
1075         .set_load               = spmi_regulator_common_set_load,
1076         .set_pull_down          = spmi_regulator_common_set_pull_down,
1077 };
1078
1079 static struct regulator_ops spmi_ult_lo_smps_ops = {
1080         .enable                 = spmi_regulator_common_enable,
1081         .disable                = spmi_regulator_common_disable,
1082         .is_enabled             = spmi_regulator_common_is_enabled,
1083         .set_voltage            = spmi_regulator_ult_lo_smps_set_voltage,
1084         .get_voltage            = spmi_regulator_ult_lo_smps_get_voltage,
1085         .list_voltage           = spmi_regulator_common_list_voltage,
1086         .set_mode               = spmi_regulator_common_set_mode,
1087         .get_mode               = spmi_regulator_common_get_mode,
1088         .set_load               = spmi_regulator_common_set_load,
1089         .set_pull_down          = spmi_regulator_common_set_pull_down,
1090 };
1091
1092 static struct regulator_ops spmi_ult_ho_smps_ops = {
1093         .enable                 = spmi_regulator_common_enable,
1094         .disable                = spmi_regulator_common_disable,
1095         .is_enabled             = spmi_regulator_common_is_enabled,
1096         .set_voltage            = spmi_regulator_single_range_set_voltage,
1097         .get_voltage            = spmi_regulator_single_range_get_voltage,
1098         .list_voltage           = spmi_regulator_common_list_voltage,
1099         .set_mode               = spmi_regulator_common_set_mode,
1100         .get_mode               = spmi_regulator_common_get_mode,
1101         .set_load               = spmi_regulator_common_set_load,
1102         .set_pull_down          = spmi_regulator_common_set_pull_down,
1103 };
1104
1105 static struct regulator_ops spmi_ult_ldo_ops = {
1106         .enable                 = spmi_regulator_common_enable,
1107         .disable                = spmi_regulator_common_disable,
1108         .is_enabled             = spmi_regulator_common_is_enabled,
1109         .set_voltage            = spmi_regulator_single_range_set_voltage,
1110         .get_voltage            = spmi_regulator_single_range_get_voltage,
1111         .list_voltage           = spmi_regulator_common_list_voltage,
1112         .set_mode               = spmi_regulator_common_set_mode,
1113         .get_mode               = spmi_regulator_common_get_mode,
1114         .set_load               = spmi_regulator_common_set_load,
1115         .set_bypass             = spmi_regulator_common_set_bypass,
1116         .get_bypass             = spmi_regulator_common_get_bypass,
1117         .set_pull_down          = spmi_regulator_common_set_pull_down,
1118         .set_soft_start         = spmi_regulator_common_set_soft_start,
1119 };
1120
1121 /* Maximum possible digital major revision value */
1122 #define INF 0xFF
1123
1124 static const struct spmi_regulator_mapping supported_regulators[] = {
1125         /*           type subtype dig_min dig_max ltype ops setpoints hpm_min */
1126         SPMI_VREG(BUCK,  GP_CTL,   0, INF, SMPS,   smps,   smps,   100000),
1127         SPMI_VREG(LDO,   N300,     0, INF, LDO,    ldo,    nldo1,   10000),
1128         SPMI_VREG(LDO,   N600,     0,   0, LDO,    ldo,    nldo2,   10000),
1129         SPMI_VREG(LDO,   N1200,    0,   0, LDO,    ldo,    nldo2,   10000),
1130         SPMI_VREG(LDO,   N600,     1, INF, LDO,    ldo,    nldo3,   10000),
1131         SPMI_VREG(LDO,   N1200,    1, INF, LDO,    ldo,    nldo3,   10000),
1132         SPMI_VREG(LDO,   N600_ST,  0,   0, LDO,    ldo,    nldo2,   10000),
1133         SPMI_VREG(LDO,   N1200_ST, 0,   0, LDO,    ldo,    nldo2,   10000),
1134         SPMI_VREG(LDO,   N600_ST,  1, INF, LDO,    ldo,    nldo3,   10000),
1135         SPMI_VREG(LDO,   N1200_ST, 1, INF, LDO,    ldo,    nldo3,   10000),
1136         SPMI_VREG(LDO,   P50,      0, INF, LDO,    ldo,    pldo,     5000),
1137         SPMI_VREG(LDO,   P150,     0, INF, LDO,    ldo,    pldo,    10000),
1138         SPMI_VREG(LDO,   P300,     0, INF, LDO,    ldo,    pldo,    10000),
1139         SPMI_VREG(LDO,   P600,     0, INF, LDO,    ldo,    pldo,    10000),
1140         SPMI_VREG(LDO,   P1200,    0, INF, LDO,    ldo,    pldo,    10000),
1141         SPMI_VREG(LDO,   LN,       0, INF, LN_LDO, ln_ldo, ln_ldo,      0),
1142         SPMI_VREG(LDO,   LV_P50,   0, INF, LDO,    ldo,    pldo,     5000),
1143         SPMI_VREG(LDO,   LV_P150,  0, INF, LDO,    ldo,    pldo,    10000),
1144         SPMI_VREG(LDO,   LV_P300,  0, INF, LDO,    ldo,    pldo,    10000),
1145         SPMI_VREG(LDO,   LV_P600,  0, INF, LDO,    ldo,    pldo,    10000),
1146         SPMI_VREG(LDO,   LV_P1200, 0, INF, LDO,    ldo,    pldo,    10000),
1147         SPMI_VREG_VS(LV100,        0, INF),
1148         SPMI_VREG_VS(LV300,        0, INF),
1149         SPMI_VREG_VS(MV300,        0, INF),
1150         SPMI_VREG_VS(MV500,        0, INF),
1151         SPMI_VREG_VS(HDMI,         0, INF),
1152         SPMI_VREG_VS(OTG,          0, INF),
1153         SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST,  boost,  boost,       0),
1154         SPMI_VREG(FTS,   FTS_CTL,  0, INF, FTSMPS, ftsmps, ftsmps, 100000),
1155         SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
1156         SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
1157         SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1158                                                 ult_lo_smps,   100000),
1159         SPMI_VREG(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1160                                                 ult_lo_smps,   100000),
1161         SPMI_VREG(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps,
1162                                                 ult_lo_smps,   100000),
1163         SPMI_VREG(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps,
1164                                                 ult_ho_smps,   100000),
1165         SPMI_VREG(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1166         SPMI_VREG(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1167         SPMI_VREG(ULT_LDO, N900_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1168         SPMI_VREG(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
1169         SPMI_VREG(ULT_LDO, LV_P150,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1170         SPMI_VREG(ULT_LDO, LV_P300,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1171         SPMI_VREG(ULT_LDO, LV_P450,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1172         SPMI_VREG(ULT_LDO, P600,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1173         SPMI_VREG(ULT_LDO, P150,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
1174         SPMI_VREG(ULT_LDO, P50,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000),
1175 };
1176
1177 static void spmi_calculate_num_voltages(struct spmi_voltage_set_points *points)
1178 {
1179         unsigned int n;
1180         struct spmi_voltage_range *range = points->range;
1181
1182         for (; range < points->range + points->count; range++) {
1183                 n = 0;
1184                 if (range->set_point_max_uV) {
1185                         n = range->set_point_max_uV - range->set_point_min_uV;
1186                         n = (n / range->step_uV) + 1;
1187                 }
1188                 range->n_voltages = n;
1189                 points->n_voltages += n;
1190         }
1191 }
1192
1193 static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
1194 {
1195         const struct spmi_regulator_mapping *mapping;
1196         int ret, i;
1197         u32 dig_major_rev;
1198         u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1];
1199         u8 type, subtype;
1200
1201         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version,
1202                 ARRAY_SIZE(version));
1203         if (ret) {
1204                 dev_err(vreg->dev, "could not read version registers\n");
1205                 return ret;
1206         }
1207         dig_major_rev   = version[SPMI_COMMON_REG_DIG_MAJOR_REV
1208                                         - SPMI_COMMON_REG_DIG_MAJOR_REV];
1209         if (!force_type) {
1210                 type            = version[SPMI_COMMON_REG_TYPE -
1211                                           SPMI_COMMON_REG_DIG_MAJOR_REV];
1212                 subtype         = version[SPMI_COMMON_REG_SUBTYPE -
1213                                           SPMI_COMMON_REG_DIG_MAJOR_REV];
1214         } else {
1215                 type = force_type >> 8;
1216                 subtype = force_type;
1217         }
1218
1219         for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) {
1220                 mapping = &supported_regulators[i];
1221                 if (mapping->type == type && mapping->subtype == subtype
1222                     && mapping->revision_min <= dig_major_rev
1223                     && mapping->revision_max >= dig_major_rev)
1224                         goto found;
1225         }
1226
1227         dev_err(vreg->dev,
1228                 "unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n",
1229                 vreg->desc.name, type, subtype, dig_major_rev);
1230
1231         return -ENODEV;
1232
1233 found:
1234         vreg->logical_type      = mapping->logical_type;
1235         vreg->set_points        = mapping->set_points;
1236         vreg->hpm_min_load      = mapping->hpm_min_load;
1237         vreg->desc.ops          = mapping->ops;
1238
1239         if (mapping->set_points) {
1240                 if (!mapping->set_points->n_voltages)
1241                         spmi_calculate_num_voltages(mapping->set_points);
1242                 vreg->desc.n_voltages = mapping->set_points->n_voltages;
1243         }
1244
1245         return 0;
1246 }
1247
1248 static int spmi_regulator_ftsmps_init_slew_rate(struct spmi_regulator *vreg)
1249 {
1250         int ret;
1251         u8 reg = 0;
1252         int step, delay, slew_rate;
1253         const struct spmi_voltage_range *range;
1254
1255         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);
1256         if (ret) {
1257                 dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
1258                 return ret;
1259         }
1260
1261         range = spmi_regulator_find_range(vreg);
1262         if (!range)
1263                 return -EINVAL;
1264
1265         step = reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK;
1266         step >>= SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT;
1267
1268         delay = reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK;
1269         delay >>= SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT;
1270
1271         /* slew_rate has units of uV/us */
1272         slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step);
1273         slew_rate /= 1000 * (SPMI_FTSMPS_STEP_DELAY << delay);
1274         slew_rate *= SPMI_FTSMPS_STEP_MARGIN_NUM;
1275         slew_rate /= SPMI_FTSMPS_STEP_MARGIN_DEN;
1276
1277         /* Ensure that the slew rate is greater than 0 */
1278         vreg->slew_rate = max(slew_rate, 1);
1279
1280         return ret;
1281 }
1282
1283 static int spmi_regulator_init_registers(struct spmi_regulator *vreg,
1284                                 const struct spmi_regulator_init_data *data)
1285 {
1286         int ret;
1287         enum spmi_regulator_logical_type type;
1288         u8 ctrl_reg[8], reg, mask;
1289
1290         type = vreg->logical_type;
1291
1292         ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8);
1293         if (ret)
1294                 return ret;
1295
1296         /* Set up enable pin control. */
1297         if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS
1298              || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO
1299              || type == SPMI_REGULATOR_LOGICAL_TYPE_VS)
1300             && !(data->pin_ctrl_enable
1301                         & SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT)) {
1302                 ctrl_reg[SPMI_COMMON_IDX_ENABLE] &=
1303                         ~SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK;
1304                 ctrl_reg[SPMI_COMMON_IDX_ENABLE] |=
1305                     data->pin_ctrl_enable & SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK;
1306         }
1307
1308         /* Set up mode pin control. */
1309         if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS
1310             || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO)
1311                 && !(data->pin_ctrl_hpm
1312                         & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
1313                 ctrl_reg[SPMI_COMMON_IDX_MODE] &=
1314                         ~SPMI_COMMON_MODE_FOLLOW_ALL_MASK;
1315                 ctrl_reg[SPMI_COMMON_IDX_MODE] |=
1316                         data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_ALL_MASK;
1317         }
1318
1319         if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS
1320            && !(data->pin_ctrl_hpm & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
1321                 ctrl_reg[SPMI_COMMON_IDX_MODE] &=
1322                         ~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1323                 ctrl_reg[SPMI_COMMON_IDX_MODE] |=
1324                        data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1325         }
1326
1327         if ((type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS
1328                 || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS
1329                 || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO)
1330                 && !(data->pin_ctrl_hpm
1331                         & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
1332                 ctrl_reg[SPMI_COMMON_IDX_MODE] &=
1333                         ~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1334                 ctrl_reg[SPMI_COMMON_IDX_MODE] |=
1335                        data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
1336         }
1337
1338         /* Write back any control register values that were modified. */
1339         ret = spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8);
1340         if (ret)
1341                 return ret;
1342
1343         /* Set soft start strength and over current protection for VS. */
1344         if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS) {
1345                 if (data->vs_soft_start_strength
1346                                 != SPMI_VS_SOFT_START_STR_HW_DEFAULT) {
1347                         reg = data->vs_soft_start_strength
1348                                 & SPMI_VS_SOFT_START_SEL_MASK;
1349                         mask = SPMI_VS_SOFT_START_SEL_MASK;
1350                         return spmi_vreg_update_bits(vreg,
1351                                                      SPMI_VS_REG_SOFT_START,
1352                                                      reg, mask);
1353                 }
1354         }
1355
1356         return 0;
1357 }
1358
1359 static void spmi_regulator_get_dt_config(struct spmi_regulator *vreg,
1360                 struct device_node *node, struct spmi_regulator_init_data *data)
1361 {
1362         /*
1363          * Initialize configuration parameters to use hardware default in case
1364          * no value is specified via device tree.
1365          */
1366         data->pin_ctrl_enable       = SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT;
1367         data->pin_ctrl_hpm          = SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT;
1368         data->vs_soft_start_strength    = SPMI_VS_SOFT_START_STR_HW_DEFAULT;
1369
1370         /* These bindings are optional, so it is okay if they aren't found. */
1371         of_property_read_u32(node, "qcom,ocp-max-retries",
1372                 &vreg->ocp_max_retries);
1373         of_property_read_u32(node, "qcom,ocp-retry-delay",
1374                 &vreg->ocp_retry_delay_ms);
1375         of_property_read_u32(node, "qcom,pin-ctrl-enable",
1376                 &data->pin_ctrl_enable);
1377         of_property_read_u32(node, "qcom,pin-ctrl-hpm", &data->pin_ctrl_hpm);
1378         of_property_read_u32(node, "qcom,vs-soft-start-strength",
1379                 &data->vs_soft_start_strength);
1380 }
1381
1382 static unsigned int spmi_regulator_of_map_mode(unsigned int mode)
1383 {
1384         if (mode == 1)
1385                 return REGULATOR_MODE_NORMAL;
1386         if (mode == 2)
1387                 return REGULATOR_MODE_FAST;
1388
1389         return REGULATOR_MODE_IDLE;
1390 }
1391
1392 static int spmi_regulator_of_parse(struct device_node *node,
1393                             const struct regulator_desc *desc,
1394                             struct regulator_config *config)
1395 {
1396         struct spmi_regulator_init_data data = { };
1397         struct spmi_regulator *vreg = config->driver_data;
1398         struct device *dev = config->dev;
1399         int ret;
1400
1401         spmi_regulator_get_dt_config(vreg, node, &data);
1402
1403         if (!vreg->ocp_max_retries)
1404                 vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES;
1405         if (!vreg->ocp_retry_delay_ms)
1406                 vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS;
1407
1408         ret = spmi_regulator_init_registers(vreg, &data);
1409         if (ret) {
1410                 dev_err(dev, "common initialization failed, ret=%d\n", ret);
1411                 return ret;
1412         }
1413
1414         if (vreg->logical_type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) {
1415                 ret = spmi_regulator_ftsmps_init_slew_rate(vreg);
1416                 if (ret)
1417                         return ret;
1418         }
1419
1420         if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS)
1421                 vreg->ocp_irq = 0;
1422
1423         if (vreg->ocp_irq) {
1424                 ret = devm_request_irq(dev, vreg->ocp_irq,
1425                         spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp",
1426                         vreg);
1427                 if (ret < 0) {
1428                         dev_err(dev, "failed to request irq %d, ret=%d\n",
1429                                 vreg->ocp_irq, ret);
1430                         return ret;
1431                 }
1432
1433                 INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work);
1434         }
1435
1436         return 0;
1437 }
1438
1439 static const struct spmi_regulator_data pm8941_regulators[] = {
1440         { "s1", 0x1400, "vdd_s1", },
1441         { "s2", 0x1700, "vdd_s2", },
1442         { "s3", 0x1a00, "vdd_s3", },
1443         { "l1", 0x4000, "vdd_l1_l3", },
1444         { "l2", 0x4100, "vdd_l2_lvs_1_2_3", },
1445         { "l3", 0x4200, "vdd_l1_l3", },
1446         { "l4", 0x4300, "vdd_l4_l11", },
1447         { "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 },
1448         { "l6", 0x4500, "vdd_l6_l12_l14_l15", },
1449         { "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 },
1450         { "l8", 0x4700, "vdd_l8_l16_l18_19", },
1451         { "l9", 0x4800, "vdd_l9_l10_l17_l22", },
1452         { "l10", 0x4900, "vdd_l9_l10_l17_l22", },
1453         { "l11", 0x4a00, "vdd_l4_l11", },
1454         { "l12", 0x4b00, "vdd_l6_l12_l14_l15", },
1455         { "l13", 0x4c00, "vdd_l13_l20_l23_l24", },
1456         { "l14", 0x4d00, "vdd_l6_l12_l14_l15", },
1457         { "l15", 0x4e00, "vdd_l6_l12_l14_l15", },
1458         { "l16", 0x4f00, "vdd_l8_l16_l18_19", },
1459         { "l17", 0x5000, "vdd_l9_l10_l17_l22", },
1460         { "l18", 0x5100, "vdd_l8_l16_l18_19", },
1461         { "l19", 0x5200, "vdd_l8_l16_l18_19", },
1462         { "l20", 0x5300, "vdd_l13_l20_l23_l24", },
1463         { "l21", 0x5400, "vdd_l21", },
1464         { "l22", 0x5500, "vdd_l9_l10_l17_l22", },
1465         { "l23", 0x5600, "vdd_l13_l20_l23_l24", },
1466         { "l24", 0x5700, "vdd_l13_l20_l23_l24", },
1467         { "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", },
1468         { "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", },
1469         { "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", },
1470         { "mvs1", 0x8300, "vin_5vs", },
1471         { "mvs2", 0x8400, "vin_5vs", },
1472         { }
1473 };
1474
1475 static const struct spmi_regulator_data pm8841_regulators[] = {
1476         { "s1", 0x1400, "vdd_s1", },
1477         { "s2", 0x1700, "vdd_s2", NULL, 0x1c08 },
1478         { "s3", 0x1a00, "vdd_s3", },
1479         { "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 },
1480         { "s5", 0x2000, "vdd_s5", NULL, 0x1c08 },
1481         { "s6", 0x2300, "vdd_s6", NULL, 0x1c08 },
1482         { "s7", 0x2600, "vdd_s7", NULL, 0x1c08 },
1483         { "s8", 0x2900, "vdd_s8", NULL, 0x1c08 },
1484         { }
1485 };
1486
1487 static const struct spmi_regulator_data pm8916_regulators[] = {
1488         { "s1", 0x1400, "vdd_s1", },
1489         { "s2", 0x1700, "vdd_s2", },
1490         { "s3", 0x1a00, "vdd_s3", },
1491         { "s4", 0x1d00, "vdd_s4", },
1492         { "l1", 0x4000, "vdd_l1_l3", },
1493         { "l2", 0x4100, "vdd_l2", },
1494         { "l3", 0x4200, "vdd_l1_l3", },
1495         { "l4", 0x4300, "vdd_l4_l5_l6", },
1496         { "l5", 0x4400, "vdd_l4_l5_l6", },
1497         { "l6", 0x4500, "vdd_l4_l5_l6", },
1498         { "l7", 0x4600, "vdd_l7", },
1499         { "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", },
1500         { "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", },
1501         { "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", },
1502         { "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", },
1503         { "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", },
1504         { "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", },
1505         { "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", },
1506         { "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", },
1507         { "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", },
1508         { "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", },
1509         { "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", },
1510         { }
1511 };
1512
1513 static const struct of_device_id qcom_spmi_regulator_match[] = {
1514         { .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
1515         { .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
1516         { .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
1517         { }
1518 };
1519 MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);
1520
1521 static int qcom_spmi_regulator_probe(struct platform_device *pdev)
1522 {
1523         const struct spmi_regulator_data *reg;
1524         const struct of_device_id *match;
1525         struct regulator_config config = { };
1526         struct regulator_dev *rdev;
1527         struct spmi_regulator *vreg;
1528         struct regmap *regmap;
1529         const char *name;
1530         struct device *dev = &pdev->dev;
1531         int ret;
1532         struct list_head *vreg_list;
1533
1534         vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
1535         if (!vreg_list)
1536                 return -ENOMEM;
1537         INIT_LIST_HEAD(vreg_list);
1538         platform_set_drvdata(pdev, vreg_list);
1539
1540         regmap = dev_get_regmap(dev->parent, NULL);
1541         if (!regmap)
1542                 return -ENODEV;
1543
1544         match = of_match_device(qcom_spmi_regulator_match, &pdev->dev);
1545         if (!match)
1546                 return -ENODEV;
1547
1548         for (reg = match->data; reg->name; reg++) {
1549                 vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
1550                 if (!vreg)
1551                         return -ENOMEM;
1552
1553                 vreg->dev = dev;
1554                 vreg->base = reg->base;
1555                 vreg->regmap = regmap;
1556
1557                 if (reg->ocp) {
1558                         vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
1559                         if (vreg->ocp_irq < 0) {
1560                                 ret = vreg->ocp_irq;
1561                                 goto err;
1562                         }
1563                 }
1564
1565                 vreg->desc.id = -1;
1566                 vreg->desc.owner = THIS_MODULE;
1567                 vreg->desc.type = REGULATOR_VOLTAGE;
1568                 vreg->desc.name = name = reg->name;
1569                 vreg->desc.supply_name = reg->supply;
1570                 vreg->desc.of_match = reg->name;
1571                 vreg->desc.of_parse_cb = spmi_regulator_of_parse;
1572                 vreg->desc.of_map_mode = spmi_regulator_of_map_mode;
1573
1574                 ret = spmi_regulator_match(vreg, reg->force_type);
1575                 if (ret)
1576                         goto err;
1577
1578                 config.dev = dev;
1579                 config.driver_data = vreg;
1580                 rdev = devm_regulator_register(dev, &vreg->desc, &config);
1581                 if (IS_ERR(rdev)) {
1582                         dev_err(dev, "failed to register %s\n", name);
1583                         ret = PTR_ERR(rdev);
1584                         goto err;
1585                 }
1586
1587                 INIT_LIST_HEAD(&vreg->node);
1588                 list_add(&vreg->node, vreg_list);
1589         }
1590
1591         return 0;
1592
1593 err:
1594         list_for_each_entry(vreg, vreg_list, node)
1595                 if (vreg->ocp_irq)
1596                         cancel_delayed_work_sync(&vreg->ocp_work);
1597         return ret;
1598 }
1599
1600 static int qcom_spmi_regulator_remove(struct platform_device *pdev)
1601 {
1602         struct spmi_regulator *vreg;
1603         struct list_head *vreg_list = platform_get_drvdata(pdev);
1604
1605         list_for_each_entry(vreg, vreg_list, node)
1606                 if (vreg->ocp_irq)
1607                         cancel_delayed_work_sync(&vreg->ocp_work);
1608
1609         return 0;
1610 }
1611
1612 static struct platform_driver qcom_spmi_regulator_driver = {
1613         .driver         = {
1614                 .name   = "qcom-spmi-regulator",
1615                 .of_match_table = qcom_spmi_regulator_match,
1616         },
1617         .probe          = qcom_spmi_regulator_probe,
1618         .remove         = qcom_spmi_regulator_remove,
1619 };
1620 module_platform_driver(qcom_spmi_regulator_driver);
1621
1622 MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver");
1623 MODULE_LICENSE("GPL v2");
1624 MODULE_ALIAS("platform:qcom-spmi-regulator");