Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux-2.6-microblaze.git] / drivers / regulator / max77802-regulator.c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // max77802.c - Regulator driver for the Maxim 77802
4 //
5 // Copyright (C) 2013-2014 Google, Inc
6 // Simon Glass <sjg@chromium.org>
7 //
8 // Copyright (C) 2012 Samsung Electronics
9 // Chiwoong Byun <woong.byun@samsung.com>
10 // Jonghwa Lee <jonghwa3.lee@samsung.com>
11 //
12 // This driver is based on max8997.c
13
14 #include <linux/kernel.h>
15 #include <linux/bug.h>
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/slab.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/regulator/driver.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/regulator/of_regulator.h>
25 #include <linux/mfd/max77686.h>
26 #include <linux/mfd/max77686-private.h>
27 #include <dt-bindings/regulator/maxim,max77802.h>
28
29 /* Default ramp delay in case it is not manually set */
30 #define MAX77802_RAMP_DELAY             100000          /* uV/us */
31
32 #define MAX77802_OPMODE_SHIFT_LDO       6
33 #define MAX77802_OPMODE_BUCK234_SHIFT   4
34 #define MAX77802_OPMODE_MASK            0x3
35
36 #define MAX77802_VSEL_MASK              0x3F
37 #define MAX77802_DVS_VSEL_MASK          0xFF
38
39 #define MAX77802_RAMP_RATE_MASK_2BIT    0xC0
40 #define MAX77802_RAMP_RATE_SHIFT_2BIT   6
41 #define MAX77802_RAMP_RATE_MASK_4BIT    0xF0
42 #define MAX77802_RAMP_RATE_SHIFT_4BIT   4
43
44 #define MAX77802_STATUS_OFF             0x0
45 #define MAX77802_OFF_PWRREQ             0x1
46 #define MAX77802_LP_PWRREQ              0x2
47
48 /* MAX77802 has two register formats: 2-bit and 4-bit */
49 static const unsigned int ramp_table_77802_2bit[] = {
50         12500,
51         25000,
52         50000,
53         100000,
54 };
55
56 static unsigned int ramp_table_77802_4bit[] = {
57         1000,   2000,   3030,   4000,
58         5000,   5880,   7140,   8330,
59         9090,   10000,  11110,  12500,
60         16670,  25000,  50000,  100000,
61 };
62
63 struct max77802_regulator_prv {
64         /* Array indexed by regulator id */
65         unsigned int opmode[MAX77802_REG_MAX];
66 };
67
68 static inline unsigned int max77802_map_mode(unsigned int mode)
69 {
70         return mode == MAX77802_OPMODE_NORMAL ?
71                 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
72 }
73
74 static int max77802_get_opmode_shift(int id)
75 {
76         if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
77                                      id <= MAX77802_BUCK10))
78                 return 0;
79
80         if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
81                 return MAX77802_OPMODE_BUCK234_SHIFT;
82
83         if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
84                 return MAX77802_OPMODE_SHIFT_LDO;
85
86         return -EINVAL;
87 }
88
89 /**
90  * max77802_set_suspend_disable - Disable the regulator during system suspend
91  * @rdev: regulator to mark as disabled
92  *
93  * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
94  * Configure the regulator so the PMIC will turn it OFF during system suspend.
95  */
96 static int max77802_set_suspend_disable(struct regulator_dev *rdev)
97 {
98         unsigned int val = MAX77802_OFF_PWRREQ;
99         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
100         int id = rdev_get_id(rdev);
101         int shift = max77802_get_opmode_shift(id);
102
103         max77802->opmode[id] = val;
104         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
105                                   rdev->desc->enable_mask, val << shift);
106 }
107
108 /*
109  * Some LDOs support Low Power Mode while the system is running.
110  *
111  * LDOs 1, 3, 20, 21.
112  */
113 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
114 {
115         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
116         int id = rdev_get_id(rdev);
117         unsigned int val;
118         int shift = max77802_get_opmode_shift(id);
119
120         switch (mode) {
121         case REGULATOR_MODE_STANDBY:
122                 val = MAX77802_OPMODE_LP;       /* ON in Low Power Mode */
123                 break;
124         case REGULATOR_MODE_NORMAL:
125                 val = MAX77802_OPMODE_NORMAL;   /* ON in Normal Mode */
126                 break;
127         default:
128                 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
129                          rdev->desc->name, mode);
130                 return -EINVAL;
131         }
132
133         max77802->opmode[id] = val;
134         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
135                                   rdev->desc->enable_mask, val << shift);
136 }
137
138 static unsigned max77802_get_mode(struct regulator_dev *rdev)
139 {
140         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
141         int id = rdev_get_id(rdev);
142
143         return max77802_map_mode(max77802->opmode[id]);
144 }
145
146 /**
147  * max77802_set_suspend_mode - set regulator opmode when the system is suspended
148  * @rdev: regulator to change mode
149  * @mode: operating mode to be set
150  *
151  * Will set the operating mode for the regulators during system suspend.
152  * This function is valid for the three different enable control logics:
153  *
154  * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
155  * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
156  * Enable Control Logic3 by PWRREQ (LDO 3)
157  *
158  * If setting the regulator mode fails, the function only warns but does
159  * not return an error code to avoid the regulator core to stop setting
160  * the operating mode for the remaining regulators.
161  */
162 static int max77802_set_suspend_mode(struct regulator_dev *rdev,
163                                      unsigned int mode)
164 {
165         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
166         int id = rdev_get_id(rdev);
167         unsigned int val;
168         int shift = max77802_get_opmode_shift(id);
169
170         /*
171          * If the regulator has been disabled for suspend
172          * then is invalid to try setting a suspend mode.
173          */
174         if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
175                 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
176                          rdev->desc->name, mode);
177                 return 0;
178         }
179
180         switch (mode) {
181         case REGULATOR_MODE_STANDBY:
182                 /*
183                  * If the regulator opmode is normal then enable
184                  * ON in Low Power Mode by PWRREQ. If the mode is
185                  * already Low Power then no action is required.
186                  */
187                 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
188                         val = MAX77802_LP_PWRREQ;
189                 else
190                         return 0;
191                 break;
192         case REGULATOR_MODE_NORMAL:
193                 /*
194                  * If the regulator operating mode is Low Power then
195                  * normal is not a valid opmode in suspend. If the
196                  * mode is already normal then no action is required.
197                  */
198                 if (max77802->opmode[id] == MAX77802_OPMODE_LP)
199                         dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
200                                  rdev->desc->name, mode);
201                 return 0;
202         default:
203                 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
204                          rdev->desc->name, mode);
205                 return -EINVAL;
206         }
207
208         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
209                                   rdev->desc->enable_mask, val << shift);
210 }
211
212 static int max77802_enable(struct regulator_dev *rdev)
213 {
214         struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
215         int id = rdev_get_id(rdev);
216         int shift = max77802_get_opmode_shift(id);
217
218         if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
219                 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
220
221         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
222                                   rdev->desc->enable_mask,
223                                   max77802->opmode[id] << shift);
224 }
225
226 static int max77802_find_ramp_value(struct regulator_dev *rdev,
227                                     const unsigned int limits[], int size,
228                                     unsigned int ramp_delay)
229 {
230         int i;
231
232         for (i = 0; i < size; i++) {
233                 if (ramp_delay <= limits[i])
234                         return i;
235         }
236
237         /* Use maximum value for no ramp control */
238         dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
239                  rdev->desc->name, ramp_delay);
240         return size - 1;
241 }
242
243 /* Used for BUCKs 2-4 */
244 static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
245                                         int ramp_delay)
246 {
247         int id = rdev_get_id(rdev);
248         unsigned int ramp_value;
249
250         if (id > MAX77802_BUCK4) {
251                         dev_warn(&rdev->dev,
252                                  "%s: regulator: ramp delay not supported\n",
253                                  rdev->desc->name);
254                 return -EINVAL;
255         }
256         ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
257                                 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
258
259         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
260                                   MAX77802_RAMP_RATE_MASK_2BIT,
261                                   ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
262 }
263
264 /* For BUCK1, 6 */
265 static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
266                                             int ramp_delay)
267 {
268         unsigned int ramp_value;
269
270         ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
271                                 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
272
273         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
274                                   MAX77802_RAMP_RATE_MASK_4BIT,
275                                   ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
276 }
277
278 /*
279  * LDOs 2, 4-19, 22-35
280  */
281 static const struct regulator_ops max77802_ldo_ops_logic1 = {
282         .list_voltage           = regulator_list_voltage_linear,
283         .map_voltage            = regulator_map_voltage_linear,
284         .is_enabled             = regulator_is_enabled_regmap,
285         .enable                 = max77802_enable,
286         .disable                = regulator_disable_regmap,
287         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
288         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
289         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
290         .set_suspend_disable    = max77802_set_suspend_disable,
291         .set_suspend_mode       = max77802_set_suspend_mode,
292 };
293
294 /*
295  * LDOs 1, 20, 21, 3
296  */
297 static const struct regulator_ops max77802_ldo_ops_logic2 = {
298         .list_voltage           = regulator_list_voltage_linear,
299         .map_voltage            = regulator_map_voltage_linear,
300         .is_enabled             = regulator_is_enabled_regmap,
301         .enable                 = max77802_enable,
302         .disable                = regulator_disable_regmap,
303         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
304         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
305         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
306         .set_mode               = max77802_set_mode,
307         .get_mode               = max77802_get_mode,
308         .set_suspend_mode       = max77802_set_suspend_mode,
309 };
310
311 /* BUCKS 1, 6 */
312 static const struct regulator_ops max77802_buck_16_dvs_ops = {
313         .list_voltage           = regulator_list_voltage_linear,
314         .map_voltage            = regulator_map_voltage_linear,
315         .is_enabled             = regulator_is_enabled_regmap,
316         .enable                 = max77802_enable,
317         .disable                = regulator_disable_regmap,
318         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
319         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
320         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
321         .set_ramp_delay         = max77802_set_ramp_delay_4bit,
322         .set_suspend_disable    = max77802_set_suspend_disable,
323 };
324
325 /* BUCKs 2-4 */
326 static const struct regulator_ops max77802_buck_234_ops = {
327         .list_voltage           = regulator_list_voltage_linear,
328         .map_voltage            = regulator_map_voltage_linear,
329         .is_enabled             = regulator_is_enabled_regmap,
330         .enable                 = max77802_enable,
331         .disable                = regulator_disable_regmap,
332         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
333         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
334         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
335         .set_ramp_delay         = max77802_set_ramp_delay_2bit,
336         .set_suspend_disable    = max77802_set_suspend_disable,
337         .set_suspend_mode       = max77802_set_suspend_mode,
338 };
339
340 /* BUCKs 5, 7-10 */
341 static const struct regulator_ops max77802_buck_dvs_ops = {
342         .list_voltage           = regulator_list_voltage_linear,
343         .map_voltage            = regulator_map_voltage_linear,
344         .is_enabled             = regulator_is_enabled_regmap,
345         .enable                 = max77802_enable,
346         .disable                = regulator_disable_regmap,
347         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
348         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
349         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
350         .set_ramp_delay         = max77802_set_ramp_delay_2bit,
351         .set_suspend_disable    = max77802_set_suspend_disable,
352 };
353
354 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
355 #define regulator_77802_desc_p_ldo(num, supply, log)    {               \
356         .name           = "LDO"#num,                                    \
357         .of_match       = of_match_ptr("LDO"#num),                      \
358         .regulators_node        = of_match_ptr("regulators"),           \
359         .id             = MAX77802_LDO##num,                            \
360         .supply_name    = "inl"#supply,                                 \
361         .ops            = &max77802_ldo_ops_logic##log,                 \
362         .type           = REGULATOR_VOLTAGE,                            \
363         .owner          = THIS_MODULE,                                  \
364         .min_uV         = 800000,                                       \
365         .uV_step        = 50000,                                        \
366         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
367         .n_voltages     = 1 << 6,                                       \
368         .vsel_reg       = MAX77802_REG_LDO1CTRL1 + num - 1,             \
369         .vsel_mask      = MAX77802_VSEL_MASK,                           \
370         .enable_reg     = MAX77802_REG_LDO1CTRL1 + num - 1,             \
371         .enable_mask    = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
372         .of_map_mode    = max77802_map_mode,                            \
373 }
374
375 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
376 #define regulator_77802_desc_n_ldo(num, supply, log)   {                \
377         .name           = "LDO"#num,                                    \
378         .of_match       = of_match_ptr("LDO"#num),                      \
379         .regulators_node        = of_match_ptr("regulators"),           \
380         .id             = MAX77802_LDO##num,                            \
381         .supply_name    = "inl"#supply,                                 \
382         .ops            = &max77802_ldo_ops_logic##log,                 \
383         .type           = REGULATOR_VOLTAGE,                            \
384         .owner          = THIS_MODULE,                                  \
385         .min_uV         = 800000,                                       \
386         .uV_step        = 25000,                                        \
387         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
388         .n_voltages     = 1 << 6,                                       \
389         .vsel_reg       = MAX77802_REG_LDO1CTRL1 + num - 1,             \
390         .vsel_mask      = MAX77802_VSEL_MASK,                           \
391         .enable_reg     = MAX77802_REG_LDO1CTRL1 + num - 1,             \
392         .enable_mask    = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
393         .of_map_mode    = max77802_map_mode,                            \
394 }
395
396 /* BUCKs 1, 6 */
397 #define regulator_77802_desc_16_buck(num)       {               \
398         .name           = "BUCK"#num,                                   \
399         .of_match       = of_match_ptr("BUCK"#num),                     \
400         .regulators_node        = of_match_ptr("regulators"),           \
401         .id             = MAX77802_BUCK##num,                           \
402         .supply_name    = "inb"#num,                                    \
403         .ops            = &max77802_buck_16_dvs_ops,                    \
404         .type           = REGULATOR_VOLTAGE,                            \
405         .owner          = THIS_MODULE,                                  \
406         .min_uV         = 612500,                                       \
407         .uV_step        = 6250,                                         \
408         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
409         .n_voltages     = 1 << 8,                                       \
410         .vsel_reg       = MAX77802_REG_BUCK ## num ## DVS1,             \
411         .vsel_mask      = MAX77802_DVS_VSEL_MASK,                       \
412         .enable_reg     = MAX77802_REG_BUCK ## num ## CTRL,             \
413         .enable_mask    = MAX77802_OPMODE_MASK,                         \
414         .of_map_mode    = max77802_map_mode,                            \
415 }
416
417 /* BUCKS 2-4 */
418 #define regulator_77802_desc_234_buck(num)      {               \
419         .name           = "BUCK"#num,                                   \
420         .of_match       = of_match_ptr("BUCK"#num),                     \
421         .regulators_node        = of_match_ptr("regulators"),           \
422         .id             = MAX77802_BUCK##num,                           \
423         .supply_name    = "inb"#num,                                    \
424         .ops            = &max77802_buck_234_ops,                       \
425         .type           = REGULATOR_VOLTAGE,                            \
426         .owner          = THIS_MODULE,                                  \
427         .min_uV         = 600000,                                       \
428         .uV_step        = 6250,                                         \
429         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
430         .n_voltages     = 0x91,                                         \
431         .vsel_reg       = MAX77802_REG_BUCK ## num ## DVS1,             \
432         .vsel_mask      = MAX77802_DVS_VSEL_MASK,                       \
433         .enable_reg     = MAX77802_REG_BUCK ## num ## CTRL1,            \
434         .enable_mask    = MAX77802_OPMODE_MASK <<                       \
435                                 MAX77802_OPMODE_BUCK234_SHIFT,          \
436         .of_map_mode    = max77802_map_mode,                            \
437 }
438
439 /* BUCK 5 */
440 #define regulator_77802_desc_buck5(num)         {               \
441         .name           = "BUCK"#num,                                   \
442         .of_match       = of_match_ptr("BUCK"#num),                     \
443         .regulators_node        = of_match_ptr("regulators"),           \
444         .id             = MAX77802_BUCK##num,                           \
445         .supply_name    = "inb"#num,                                    \
446         .ops            = &max77802_buck_dvs_ops,                       \
447         .type           = REGULATOR_VOLTAGE,                            \
448         .owner          = THIS_MODULE,                                  \
449         .min_uV         = 750000,                                       \
450         .uV_step        = 50000,                                        \
451         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
452         .n_voltages     = 1 << 6,                                       \
453         .vsel_reg       = MAX77802_REG_BUCK5OUT,                        \
454         .vsel_mask      = MAX77802_VSEL_MASK,                           \
455         .enable_reg     = MAX77802_REG_BUCK5CTRL,                       \
456         .enable_mask    = MAX77802_OPMODE_MASK,                         \
457         .of_map_mode    = max77802_map_mode,                            \
458 }
459
460 /* BUCKs 7-10 */
461 #define regulator_77802_desc_buck7_10(num)      {               \
462         .name           = "BUCK"#num,                                   \
463         .of_match       = of_match_ptr("BUCK"#num),                     \
464         .regulators_node        = of_match_ptr("regulators"),           \
465         .id             = MAX77802_BUCK##num,                           \
466         .supply_name    = "inb"#num,                                    \
467         .ops            = &max77802_buck_dvs_ops,                       \
468         .type           = REGULATOR_VOLTAGE,                            \
469         .owner          = THIS_MODULE,                                  \
470         .min_uV         = 750000,                                       \
471         .uV_step        = 50000,                                        \
472         .ramp_delay     = MAX77802_RAMP_DELAY,                          \
473         .n_voltages     = 1 << 6,                                       \
474         .vsel_reg       = MAX77802_REG_BUCK7OUT + (num - 7) * 3,        \
475         .vsel_mask      = MAX77802_VSEL_MASK,                           \
476         .enable_reg     = MAX77802_REG_BUCK7CTRL + (num - 7) * 3,       \
477         .enable_mask    = MAX77802_OPMODE_MASK,                         \
478         .of_map_mode    = max77802_map_mode,                            \
479 }
480
481 static const struct regulator_desc regulators[] = {
482         regulator_77802_desc_16_buck(1),
483         regulator_77802_desc_234_buck(2),
484         regulator_77802_desc_234_buck(3),
485         regulator_77802_desc_234_buck(4),
486         regulator_77802_desc_buck5(5),
487         regulator_77802_desc_16_buck(6),
488         regulator_77802_desc_buck7_10(7),
489         regulator_77802_desc_buck7_10(8),
490         regulator_77802_desc_buck7_10(9),
491         regulator_77802_desc_buck7_10(10),
492         regulator_77802_desc_n_ldo(1, 10, 2),
493         regulator_77802_desc_n_ldo(2, 10, 1),
494         regulator_77802_desc_p_ldo(3, 3, 2),
495         regulator_77802_desc_p_ldo(4, 6, 1),
496         regulator_77802_desc_p_ldo(5, 3, 1),
497         regulator_77802_desc_p_ldo(6, 3, 1),
498         regulator_77802_desc_p_ldo(7, 3, 1),
499         regulator_77802_desc_n_ldo(8, 1, 1),
500         regulator_77802_desc_p_ldo(9, 5, 1),
501         regulator_77802_desc_p_ldo(10, 4, 1),
502         regulator_77802_desc_p_ldo(11, 4, 1),
503         regulator_77802_desc_p_ldo(12, 9, 1),
504         regulator_77802_desc_p_ldo(13, 4, 1),
505         regulator_77802_desc_p_ldo(14, 4, 1),
506         regulator_77802_desc_n_ldo(15, 1, 1),
507         regulator_77802_desc_n_ldo(17, 2, 1),
508         regulator_77802_desc_p_ldo(18, 7, 1),
509         regulator_77802_desc_p_ldo(19, 5, 1),
510         regulator_77802_desc_p_ldo(20, 7, 2),
511         regulator_77802_desc_p_ldo(21, 6, 2),
512         regulator_77802_desc_p_ldo(23, 9, 1),
513         regulator_77802_desc_p_ldo(24, 6, 1),
514         regulator_77802_desc_p_ldo(25, 9, 1),
515         regulator_77802_desc_p_ldo(26, 9, 1),
516         regulator_77802_desc_n_ldo(27, 2, 1),
517         regulator_77802_desc_p_ldo(28, 7, 1),
518         regulator_77802_desc_p_ldo(29, 7, 1),
519         regulator_77802_desc_n_ldo(30, 2, 1),
520         regulator_77802_desc_p_ldo(32, 9, 1),
521         regulator_77802_desc_p_ldo(33, 6, 1),
522         regulator_77802_desc_p_ldo(34, 9, 1),
523         regulator_77802_desc_n_ldo(35, 2, 1),
524 };
525
526 static int max77802_pmic_probe(struct platform_device *pdev)
527 {
528         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
529         struct max77802_regulator_prv *max77802;
530         int i, val;
531         struct regulator_config config = { };
532
533         max77802 = devm_kzalloc(&pdev->dev,
534                                 sizeof(struct max77802_regulator_prv),
535                                 GFP_KERNEL);
536         if (!max77802)
537                 return -ENOMEM;
538
539         config.dev = iodev->dev;
540         config.regmap = iodev->regmap;
541         config.driver_data = max77802;
542         platform_set_drvdata(pdev, max77802);
543
544         for (i = 0; i < MAX77802_REG_MAX; i++) {
545                 struct regulator_dev *rdev;
546                 int id = regulators[i].id;
547                 int shift = max77802_get_opmode_shift(id);
548                 int ret;
549
550                 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
551                 if (ret < 0) {
552                         dev_warn(&pdev->dev,
553                                 "cannot read current mode for %d\n", i);
554                         val = MAX77802_OPMODE_NORMAL;
555                 } else {
556                         val = val >> shift & MAX77802_OPMODE_MASK;
557                 }
558
559                 /*
560                  * If the regulator is disabled and the system warm rebooted,
561                  * the hardware reports OFF as the regulator operating mode.
562                  * Default to operating mode NORMAL in that case.
563                  */
564                 if (val == MAX77802_STATUS_OFF)
565                         max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
566                 else
567                         max77802->opmode[id] = val;
568
569                 rdev = devm_regulator_register(&pdev->dev,
570                                                &regulators[i], &config);
571                 if (IS_ERR(rdev)) {
572                         ret = PTR_ERR(rdev);
573                         dev_err(&pdev->dev,
574                                 "regulator init failed for %d: %d\n", i, ret);
575                         return ret;
576                 }
577         }
578
579         return 0;
580 }
581
582 static const struct platform_device_id max77802_pmic_id[] = {
583         {"max77802-pmic", 0},
584         { },
585 };
586 MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
587
588 static struct platform_driver max77802_pmic_driver = {
589         .driver = {
590                 .name = "max77802-pmic",
591         },
592         .probe = max77802_pmic_probe,
593         .id_table = max77802_pmic_id,
594 };
595
596 module_platform_driver(max77802_pmic_driver);
597
598 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
599 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
600 MODULE_LICENSE("GPL");