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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/slab.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/regulator/of_regulator.h>
23#include <linux/mfd/max77686.h>
24#include <linux/mfd/max77686-private.h>
25#include <dt-bindings/regulator/maxim,max77802.h>
26
27/* Default ramp delay in case it is not manually set */
28#define MAX77802_RAMP_DELAY 100000 /* uV/us */
29
30#define MAX77802_OPMODE_SHIFT_LDO 6
31#define MAX77802_OPMODE_BUCK234_SHIFT 4
32#define MAX77802_OPMODE_MASK 0x3
33
34#define MAX77802_VSEL_MASK 0x3F
35#define MAX77802_DVS_VSEL_MASK 0xFF
36
37#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
38#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
39#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
40#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
41
42#define MAX77802_STATUS_OFF 0x0
43#define MAX77802_OFF_PWRREQ 0x1
44#define MAX77802_LP_PWRREQ 0x2
45
46/* MAX77802 has two register formats: 2-bit and 4-bit */
47static const unsigned int ramp_table_77802_2bit[] = {
48 12500,
49 25000,
50 50000,
51 100000,
52};
53
54static unsigned int ramp_table_77802_4bit[] = {
55 1000, 2000, 3030, 4000,
56 5000, 5880, 7140, 8330,
57 9090, 10000, 11110, 12500,
58 16670, 25000, 50000, 100000,
59};
60
61struct max77802_regulator_prv {
62 /* Array indexed by regulator id */
63 unsigned int opmode[MAX77802_REG_MAX];
64};
65
66static inline unsigned int max77802_map_mode(unsigned int mode)
67{
68 return mode == MAX77802_OPMODE_NORMAL ?
69 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
70}
71
72static int max77802_get_opmode_shift(int id)
73{
74 if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
75 id <= MAX77802_BUCK10))
76 return 0;
77
78 if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
79 return MAX77802_OPMODE_BUCK234_SHIFT;
80
81 if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
82 return MAX77802_OPMODE_SHIFT_LDO;
83
84 return -EINVAL;
85}
86
87/**
88 * max77802_set_suspend_disable - Disable the regulator during system suspend
89 * @rdev: regulator to mark as disabled
90 *
91 * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
92 * Configure the regulator so the PMIC will turn it OFF during system suspend.
93 */
94static int max77802_set_suspend_disable(struct regulator_dev *rdev)
95{
96 unsigned int val = MAX77802_OFF_PWRREQ;
97 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
98 int id = rdev_get_id(rdev);
99 int shift = max77802_get_opmode_shift(id);
100
101 max77802->opmode[id] = val;
102 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
103 rdev->desc->enable_mask, val << shift);
104}
105
106/*
107 * Some LDOs support Low Power Mode while the system is running.
108 *
109 * LDOs 1, 3, 20, 21.
110 */
111static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
112{
113 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
114 int id = rdev_get_id(rdev);
115 unsigned int val;
116 int shift = max77802_get_opmode_shift(id);
117
118 switch (mode) {
119 case REGULATOR_MODE_STANDBY:
120 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
121 break;
122 case REGULATOR_MODE_NORMAL:
123 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
124 break;
125 default:
126 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
127 rdev->desc->name, mode);
128 return -EINVAL;
129 }
130
131 max77802->opmode[id] = val;
132 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
133 rdev->desc->enable_mask, val << shift);
134}
135
136static unsigned max77802_get_mode(struct regulator_dev *rdev)
137{
138 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
139 int id = rdev_get_id(rdev);
140
141 return max77802_map_mode(max77802->opmode[id]);
142}
143
144/**
145 * max77802_set_suspend_mode - set regulator opmode when the system is suspended
146 * @rdev: regulator to change mode
147 * @mode: operating mode to be set
148 *
149 * Will set the operating mode for the regulators during system suspend.
150 * This function is valid for the three different enable control logics:
151 *
152 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
153 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
154 * Enable Control Logic3 by PWRREQ (LDO 3)
155 *
156 * If setting the regulator mode fails, the function only warns but does
157 * not return an error code to avoid the regulator core to stop setting
158 * the operating mode for the remaining regulators.
159 */
160static int max77802_set_suspend_mode(struct regulator_dev *rdev,
161 unsigned int mode)
162{
163 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
164 int id = rdev_get_id(rdev);
165 unsigned int val;
166 int shift = max77802_get_opmode_shift(id);
167
168 /*
169 * If the regulator has been disabled for suspend
170 * then is invalid to try setting a suspend mode.
171 */
172 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
173 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
174 rdev->desc->name, mode);
175 return 0;
176 }
177
178 switch (mode) {
179 case REGULATOR_MODE_STANDBY:
180 /*
181 * If the regulator opmode is normal then enable
182 * ON in Low Power Mode by PWRREQ. If the mode is
183 * already Low Power then no action is required.
184 */
185 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
186 val = MAX77802_LP_PWRREQ;
187 else
188 return 0;
189 break;
190 case REGULATOR_MODE_NORMAL:
191 /*
192 * If the regulator operating mode is Low Power then
193 * normal is not a valid opmode in suspend. If the
194 * mode is already normal then no action is required.
195 */
196 if (max77802->opmode[id] == MAX77802_OPMODE_LP)
197 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
198 rdev->desc->name, mode);
199 return 0;
200 default:
201 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
202 rdev->desc->name, mode);
203 return -EINVAL;
204 }
205
206 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
207 rdev->desc->enable_mask, val << shift);
208}
209
210static int max77802_enable(struct regulator_dev *rdev)
211{
212 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
213 int id = rdev_get_id(rdev);
214 int shift = max77802_get_opmode_shift(id);
215
216 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
217 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
218
219 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
220 rdev->desc->enable_mask,
221 max77802->opmode[id] << shift);
222}
223
224static int max77802_find_ramp_value(struct regulator_dev *rdev,
225 const unsigned int limits[], int size,
226 unsigned int ramp_delay)
227{
228 int i;
229
230 for (i = 0; i < size; i++) {
231 if (ramp_delay <= limits[i])
232 return i;
233 }
234
235 /* Use maximum value for no ramp control */
236 dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
237 rdev->desc->name, ramp_delay);
238 return size - 1;
239}
240
241/* Used for BUCKs 2-4 */
242static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
243 int ramp_delay)
244{
245 int id = rdev_get_id(rdev);
246 unsigned int ramp_value;
247
248 if (id > MAX77802_BUCK4) {
249 dev_warn(&rdev->dev,
250 "%s: regulator: ramp delay not supported\n",
251 rdev->desc->name);
252 return -EINVAL;
253 }
254 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
255 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
256
257 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
258 MAX77802_RAMP_RATE_MASK_2BIT,
259 ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
260}
261
262/* For BUCK1, 6 */
263static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
264 int ramp_delay)
265{
266 unsigned int ramp_value;
267
268 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
269 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
270
271 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
272 MAX77802_RAMP_RATE_MASK_4BIT,
273 ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
274}
275
276/*
277 * LDOs 2, 4-19, 22-35
278 */
279static const struct regulator_ops max77802_ldo_ops_logic1 = {
280 .list_voltage = regulator_list_voltage_linear,
281 .map_voltage = regulator_map_voltage_linear,
282 .is_enabled = regulator_is_enabled_regmap,
283 .enable = max77802_enable,
284 .disable = regulator_disable_regmap,
285 .get_voltage_sel = regulator_get_voltage_sel_regmap,
286 .set_voltage_sel = regulator_set_voltage_sel_regmap,
287 .set_voltage_time_sel = regulator_set_voltage_time_sel,
288 .set_suspend_disable = max77802_set_suspend_disable,
289 .set_suspend_mode = max77802_set_suspend_mode,
290};
291
292/*
293 * LDOs 1, 20, 21, 3
294 */
295static const struct regulator_ops max77802_ldo_ops_logic2 = {
296 .list_voltage = regulator_list_voltage_linear,
297 .map_voltage = regulator_map_voltage_linear,
298 .is_enabled = regulator_is_enabled_regmap,
299 .enable = max77802_enable,
300 .disable = regulator_disable_regmap,
301 .get_voltage_sel = regulator_get_voltage_sel_regmap,
302 .set_voltage_sel = regulator_set_voltage_sel_regmap,
303 .set_voltage_time_sel = regulator_set_voltage_time_sel,
304 .set_mode = max77802_set_mode,
305 .get_mode = max77802_get_mode,
306 .set_suspend_mode = max77802_set_suspend_mode,
307};
308
309/* BUCKS 1, 6 */
310static const struct regulator_ops max77802_buck_16_dvs_ops = {
311 .list_voltage = regulator_list_voltage_linear,
312 .map_voltage = regulator_map_voltage_linear,
313 .is_enabled = regulator_is_enabled_regmap,
314 .enable = max77802_enable,
315 .disable = regulator_disable_regmap,
316 .get_voltage_sel = regulator_get_voltage_sel_regmap,
317 .set_voltage_sel = regulator_set_voltage_sel_regmap,
318 .set_voltage_time_sel = regulator_set_voltage_time_sel,
319 .set_ramp_delay = max77802_set_ramp_delay_4bit,
320 .set_suspend_disable = max77802_set_suspend_disable,
321};
322
323/* BUCKs 2-4 */
324static const struct regulator_ops max77802_buck_234_ops = {
325 .list_voltage = regulator_list_voltage_linear,
326 .map_voltage = regulator_map_voltage_linear,
327 .is_enabled = regulator_is_enabled_regmap,
328 .enable = max77802_enable,
329 .disable = regulator_disable_regmap,
330 .get_voltage_sel = regulator_get_voltage_sel_regmap,
331 .set_voltage_sel = regulator_set_voltage_sel_regmap,
332 .set_voltage_time_sel = regulator_set_voltage_time_sel,
333 .set_ramp_delay = max77802_set_ramp_delay_2bit,
334 .set_suspend_disable = max77802_set_suspend_disable,
335 .set_suspend_mode = max77802_set_suspend_mode,
336};
337
338/* BUCKs 5, 7-10 */
339static const struct regulator_ops max77802_buck_dvs_ops = {
340 .list_voltage = regulator_list_voltage_linear,
341 .map_voltage = regulator_map_voltage_linear,
342 .is_enabled = regulator_is_enabled_regmap,
343 .enable = max77802_enable,
344 .disable = regulator_disable_regmap,
345 .get_voltage_sel = regulator_get_voltage_sel_regmap,
346 .set_voltage_sel = regulator_set_voltage_sel_regmap,
347 .set_voltage_time_sel = regulator_set_voltage_time_sel,
348 .set_ramp_delay = max77802_set_ramp_delay_2bit,
349 .set_suspend_disable = max77802_set_suspend_disable,
350};
351
352/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
353#define regulator_77802_desc_p_ldo(num, supply, log) { \
354 .name = "LDO"#num, \
355 .of_match = of_match_ptr("LDO"#num), \
356 .regulators_node = of_match_ptr("regulators"), \
357 .id = MAX77802_LDO##num, \
358 .supply_name = "inl"#supply, \
359 .ops = &max77802_ldo_ops_logic##log, \
360 .type = REGULATOR_VOLTAGE, \
361 .owner = THIS_MODULE, \
362 .min_uV = 800000, \
363 .uV_step = 50000, \
364 .ramp_delay = MAX77802_RAMP_DELAY, \
365 .n_voltages = 1 << 6, \
366 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
367 .vsel_mask = MAX77802_VSEL_MASK, \
368 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
369 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
370 .of_map_mode = max77802_map_mode, \
371}
372
373/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
374#define regulator_77802_desc_n_ldo(num, supply, log) { \
375 .name = "LDO"#num, \
376 .of_match = of_match_ptr("LDO"#num), \
377 .regulators_node = of_match_ptr("regulators"), \
378 .id = MAX77802_LDO##num, \
379 .supply_name = "inl"#supply, \
380 .ops = &max77802_ldo_ops_logic##log, \
381 .type = REGULATOR_VOLTAGE, \
382 .owner = THIS_MODULE, \
383 .min_uV = 800000, \
384 .uV_step = 25000, \
385 .ramp_delay = MAX77802_RAMP_DELAY, \
386 .n_voltages = 1 << 6, \
387 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
388 .vsel_mask = MAX77802_VSEL_MASK, \
389 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
390 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
391 .of_map_mode = max77802_map_mode, \
392}
393
394/* BUCKs 1, 6 */
395#define regulator_77802_desc_16_buck(num) { \
396 .name = "BUCK"#num, \
397 .of_match = of_match_ptr("BUCK"#num), \
398 .regulators_node = of_match_ptr("regulators"), \
399 .id = MAX77802_BUCK##num, \
400 .supply_name = "inb"#num, \
401 .ops = &max77802_buck_16_dvs_ops, \
402 .type = REGULATOR_VOLTAGE, \
403 .owner = THIS_MODULE, \
404 .min_uV = 612500, \
405 .uV_step = 6250, \
406 .ramp_delay = MAX77802_RAMP_DELAY, \
407 .n_voltages = 1 << 8, \
408 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
409 .vsel_mask = MAX77802_DVS_VSEL_MASK, \
410 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
411 .enable_mask = MAX77802_OPMODE_MASK, \
412 .of_map_mode = max77802_map_mode, \
413}
414
415/* BUCKS 2-4 */
416#define regulator_77802_desc_234_buck(num) { \
417 .name = "BUCK"#num, \
418 .of_match = of_match_ptr("BUCK"#num), \
419 .regulators_node = of_match_ptr("regulators"), \
420 .id = MAX77802_BUCK##num, \
421 .supply_name = "inb"#num, \
422 .ops = &max77802_buck_234_ops, \
423 .type = REGULATOR_VOLTAGE, \
424 .owner = THIS_MODULE, \
425 .min_uV = 600000, \
426 .uV_step = 6250, \
427 .ramp_delay = MAX77802_RAMP_DELAY, \
428 .n_voltages = 0x91, \
429 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
430 .vsel_mask = MAX77802_DVS_VSEL_MASK, \
431 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
432 .enable_mask = MAX77802_OPMODE_MASK << \
433 MAX77802_OPMODE_BUCK234_SHIFT, \
434 .of_map_mode = max77802_map_mode, \
435}
436
437/* BUCK 5 */
438#define regulator_77802_desc_buck5(num) { \
439 .name = "BUCK"#num, \
440 .of_match = of_match_ptr("BUCK"#num), \
441 .regulators_node = of_match_ptr("regulators"), \
442 .id = MAX77802_BUCK##num, \
443 .supply_name = "inb"#num, \
444 .ops = &max77802_buck_dvs_ops, \
445 .type = REGULATOR_VOLTAGE, \
446 .owner = THIS_MODULE, \
447 .min_uV = 750000, \
448 .uV_step = 50000, \
449 .ramp_delay = MAX77802_RAMP_DELAY, \
450 .n_voltages = 1 << 6, \
451 .vsel_reg = MAX77802_REG_BUCK5OUT, \
452 .vsel_mask = MAX77802_VSEL_MASK, \
453 .enable_reg = MAX77802_REG_BUCK5CTRL, \
454 .enable_mask = MAX77802_OPMODE_MASK, \
455 .of_map_mode = max77802_map_mode, \
456}
457
458/* BUCKs 7-10 */
459#define regulator_77802_desc_buck7_10(num) { \
460 .name = "BUCK"#num, \
461 .of_match = of_match_ptr("BUCK"#num), \
462 .regulators_node = of_match_ptr("regulators"), \
463 .id = MAX77802_BUCK##num, \
464 .supply_name = "inb"#num, \
465 .ops = &max77802_buck_dvs_ops, \
466 .type = REGULATOR_VOLTAGE, \
467 .owner = THIS_MODULE, \
468 .min_uV = 750000, \
469 .uV_step = 50000, \
470 .ramp_delay = MAX77802_RAMP_DELAY, \
471 .n_voltages = 1 << 6, \
472 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
473 .vsel_mask = MAX77802_VSEL_MASK, \
474 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
475 .enable_mask = MAX77802_OPMODE_MASK, \
476 .of_map_mode = max77802_map_mode, \
477}
478
479static const struct regulator_desc regulators[] = {
480 regulator_77802_desc_16_buck(1),
481 regulator_77802_desc_234_buck(2),
482 regulator_77802_desc_234_buck(3),
483 regulator_77802_desc_234_buck(4),
484 regulator_77802_desc_buck5(5),
485 regulator_77802_desc_16_buck(6),
486 regulator_77802_desc_buck7_10(7),
487 regulator_77802_desc_buck7_10(8),
488 regulator_77802_desc_buck7_10(9),
489 regulator_77802_desc_buck7_10(10),
490 regulator_77802_desc_n_ldo(1, 10, 2),
491 regulator_77802_desc_n_ldo(2, 10, 1),
492 regulator_77802_desc_p_ldo(3, 3, 2),
493 regulator_77802_desc_p_ldo(4, 6, 1),
494 regulator_77802_desc_p_ldo(5, 3, 1),
495 regulator_77802_desc_p_ldo(6, 3, 1),
496 regulator_77802_desc_p_ldo(7, 3, 1),
497 regulator_77802_desc_n_ldo(8, 1, 1),
498 regulator_77802_desc_p_ldo(9, 5, 1),
499 regulator_77802_desc_p_ldo(10, 4, 1),
500 regulator_77802_desc_p_ldo(11, 4, 1),
501 regulator_77802_desc_p_ldo(12, 9, 1),
502 regulator_77802_desc_p_ldo(13, 4, 1),
503 regulator_77802_desc_p_ldo(14, 4, 1),
504 regulator_77802_desc_n_ldo(15, 1, 1),
505 regulator_77802_desc_n_ldo(17, 2, 1),
506 regulator_77802_desc_p_ldo(18, 7, 1),
507 regulator_77802_desc_p_ldo(19, 5, 1),
508 regulator_77802_desc_p_ldo(20, 7, 2),
509 regulator_77802_desc_p_ldo(21, 6, 2),
510 regulator_77802_desc_p_ldo(23, 9, 1),
511 regulator_77802_desc_p_ldo(24, 6, 1),
512 regulator_77802_desc_p_ldo(25, 9, 1),
513 regulator_77802_desc_p_ldo(26, 9, 1),
514 regulator_77802_desc_n_ldo(27, 2, 1),
515 regulator_77802_desc_p_ldo(28, 7, 1),
516 regulator_77802_desc_p_ldo(29, 7, 1),
517 regulator_77802_desc_n_ldo(30, 2, 1),
518 regulator_77802_desc_p_ldo(32, 9, 1),
519 regulator_77802_desc_p_ldo(33, 6, 1),
520 regulator_77802_desc_p_ldo(34, 9, 1),
521 regulator_77802_desc_n_ldo(35, 2, 1),
522};
523
524static int max77802_pmic_probe(struct platform_device *pdev)
525{
526 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
527 struct max77802_regulator_prv *max77802;
528 int i, val;
529 struct regulator_config config = { };
530
531 max77802 = devm_kzalloc(&pdev->dev,
532 sizeof(struct max77802_regulator_prv),
533 GFP_KERNEL);
534 if (!max77802)
535 return -ENOMEM;
536
537 config.dev = iodev->dev;
538 config.regmap = iodev->regmap;
539 config.driver_data = max77802;
540 platform_set_drvdata(pdev, max77802);
541
542 for (i = 0; i < MAX77802_REG_MAX; i++) {
543 struct regulator_dev *rdev;
544 int id = regulators[i].id;
545 int shift = max77802_get_opmode_shift(id);
546 int ret;
547
548 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
549 if (ret < 0) {
550 dev_warn(&pdev->dev,
551 "cannot read current mode for %d\n", i);
552 val = MAX77802_OPMODE_NORMAL;
553 } else {
554 val = val >> shift & MAX77802_OPMODE_MASK;
555 }
556
557 /*
558 * If the regulator is disabled and the system warm rebooted,
559 * the hardware reports OFF as the regulator operating mode.
560 * Default to operating mode NORMAL in that case.
561 */
562 if (val == MAX77802_STATUS_OFF)
563 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
564 else
565 max77802->opmode[id] = val;
566
567 rdev = devm_regulator_register(&pdev->dev,
568 ®ulators[i], &config);
569 if (IS_ERR(rdev)) {
570 ret = PTR_ERR(rdev);
571 dev_err(&pdev->dev,
572 "regulator init failed for %d: %d\n", i, ret);
573 return ret;
574 }
575 }
576
577 return 0;
578}
579
580static const struct platform_device_id max77802_pmic_id[] = {
581 {"max77802-pmic", 0},
582 { },
583};
584MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
585
586static struct platform_driver max77802_pmic_driver = {
587 .driver = {
588 .name = "max77802-pmic",
589 },
590 .probe = max77802_pmic_probe,
591 .id_table = max77802_pmic_id,
592};
593
594module_platform_driver(max77802_pmic_driver);
595
596MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
597MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
598MODULE_LICENSE("GPL");
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/slab.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/regulator/of_regulator.h>
23#include <linux/mfd/max77686.h>
24#include <linux/mfd/max77686-private.h>
25#include <dt-bindings/regulator/maxim,max77802.h>
26
27/* Default ramp delay in case it is not manually set */
28#define MAX77802_RAMP_DELAY 100000 /* uV/us */
29
30#define MAX77802_OPMODE_SHIFT_LDO 6
31#define MAX77802_OPMODE_BUCK234_SHIFT 4
32#define MAX77802_OPMODE_MASK 0x3
33
34#define MAX77802_VSEL_MASK 0x3F
35#define MAX77802_DVS_VSEL_MASK 0xFF
36
37#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
38#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
39#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
40#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
41
42#define MAX77802_STATUS_OFF 0x0
43#define MAX77802_OFF_PWRREQ 0x1
44#define MAX77802_LP_PWRREQ 0x2
45
46static const unsigned int max77802_buck234_ramp_table[] = {
47 12500,
48 25000,
49 50000,
50 100000,
51};
52
53static const unsigned int max77802_buck16_ramp_table[] = {
54 1000, 2000, 3030, 4000,
55 5000, 5880, 7140, 8330,
56 9090, 10000, 11110, 12500,
57 16670, 25000, 50000, 100000,
58};
59
60struct max77802_regulator_prv {
61 /* Array indexed by regulator id */
62 unsigned int opmode[MAX77802_REG_MAX];
63};
64
65static inline unsigned int max77802_map_mode(unsigned int mode)
66{
67 return mode == MAX77802_OPMODE_NORMAL ?
68 REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
69}
70
71static int max77802_get_opmode_shift(int id)
72{
73 if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
74 id <= MAX77802_BUCK10))
75 return 0;
76
77 if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
78 return MAX77802_OPMODE_BUCK234_SHIFT;
79
80 if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
81 return MAX77802_OPMODE_SHIFT_LDO;
82
83 return -EINVAL;
84}
85
86/**
87 * max77802_set_suspend_disable - Disable the regulator during system suspend
88 * @rdev: regulator to mark as disabled
89 *
90 * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
91 * Configure the regulator so the PMIC will turn it OFF during system suspend.
92 */
93static int max77802_set_suspend_disable(struct regulator_dev *rdev)
94{
95 unsigned int val = MAX77802_OFF_PWRREQ;
96 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
97 unsigned int id = rdev_get_id(rdev);
98 int shift = max77802_get_opmode_shift(id);
99
100 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
101 return -EINVAL;
102 max77802->opmode[id] = val;
103 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
104 rdev->desc->enable_mask, val << shift);
105}
106
107/*
108 * Some LDOs support Low Power Mode while the system is running.
109 *
110 * LDOs 1, 3, 20, 21.
111 */
112static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
113{
114 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
115 unsigned int id = rdev_get_id(rdev);
116 unsigned int val;
117 int shift = max77802_get_opmode_shift(id);
118
119 switch (mode) {
120 case REGULATOR_MODE_STANDBY:
121 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
122 break;
123 case REGULATOR_MODE_NORMAL:
124 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
125 break;
126 default:
127 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
128 rdev->desc->name, mode);
129 return -EINVAL;
130 }
131
132 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
133 return -EINVAL;
134
135 max77802->opmode[id] = val;
136 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
137 rdev->desc->enable_mask, val << shift);
138}
139
140static unsigned max77802_get_mode(struct regulator_dev *rdev)
141{
142 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
143 unsigned int id = rdev_get_id(rdev);
144
145 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
146 return -EINVAL;
147 return max77802_map_mode(max77802->opmode[id]);
148}
149
150/**
151 * max77802_set_suspend_mode - set regulator opmode when the system is suspended
152 * @rdev: regulator to change mode
153 * @mode: operating mode to be set
154 *
155 * Will set the operating mode for the regulators during system suspend.
156 * This function is valid for the three different enable control logics:
157 *
158 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
159 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
160 * Enable Control Logic3 by PWRREQ (LDO 3)
161 *
162 * If setting the regulator mode fails, the function only warns but does
163 * not return an error code to avoid the regulator core to stop setting
164 * the operating mode for the remaining regulators.
165 */
166static int max77802_set_suspend_mode(struct regulator_dev *rdev,
167 unsigned int mode)
168{
169 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
170 unsigned int id = rdev_get_id(rdev);
171 unsigned int val;
172 int shift = max77802_get_opmode_shift(id);
173
174 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
175 return -EINVAL;
176
177 /*
178 * If the regulator has been disabled for suspend
179 * then is invalid to try setting a suspend mode.
180 */
181 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
182 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
183 rdev->desc->name, mode);
184 return 0;
185 }
186
187 switch (mode) {
188 case REGULATOR_MODE_STANDBY:
189 /*
190 * If the regulator opmode is normal then enable
191 * ON in Low Power Mode by PWRREQ. If the mode is
192 * already Low Power then no action is required.
193 */
194 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
195 val = MAX77802_LP_PWRREQ;
196 else
197 return 0;
198 break;
199 case REGULATOR_MODE_NORMAL:
200 /*
201 * If the regulator operating mode is Low Power then
202 * normal is not a valid opmode in suspend. If the
203 * mode is already normal then no action is required.
204 */
205 if (max77802->opmode[id] == MAX77802_OPMODE_LP)
206 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
207 rdev->desc->name, mode);
208 return 0;
209 default:
210 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
211 rdev->desc->name, mode);
212 return -EINVAL;
213 }
214
215 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
216 rdev->desc->enable_mask, val << shift);
217}
218
219static int max77802_enable(struct regulator_dev *rdev)
220{
221 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
222 unsigned int id = rdev_get_id(rdev);
223 int shift = max77802_get_opmode_shift(id);
224
225 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
226 return -EINVAL;
227 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
228 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
229
230 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
231 rdev->desc->enable_mask,
232 max77802->opmode[id] << shift);
233}
234
235/*
236 * LDOs 2, 4-19, 22-35
237 */
238static const struct regulator_ops max77802_ldo_ops_logic1 = {
239 .list_voltage = regulator_list_voltage_linear,
240 .map_voltage = regulator_map_voltage_linear,
241 .is_enabled = regulator_is_enabled_regmap,
242 .enable = max77802_enable,
243 .disable = regulator_disable_regmap,
244 .get_voltage_sel = regulator_get_voltage_sel_regmap,
245 .set_voltage_sel = regulator_set_voltage_sel_regmap,
246 .set_voltage_time_sel = regulator_set_voltage_time_sel,
247 .set_suspend_disable = max77802_set_suspend_disable,
248 .set_suspend_mode = max77802_set_suspend_mode,
249};
250
251/*
252 * LDOs 1, 20, 21, 3
253 */
254static const struct regulator_ops max77802_ldo_ops_logic2 = {
255 .list_voltage = regulator_list_voltage_linear,
256 .map_voltage = regulator_map_voltage_linear,
257 .is_enabled = regulator_is_enabled_regmap,
258 .enable = max77802_enable,
259 .disable = regulator_disable_regmap,
260 .get_voltage_sel = regulator_get_voltage_sel_regmap,
261 .set_voltage_sel = regulator_set_voltage_sel_regmap,
262 .set_voltage_time_sel = regulator_set_voltage_time_sel,
263 .set_mode = max77802_set_mode,
264 .get_mode = max77802_get_mode,
265 .set_suspend_mode = max77802_set_suspend_mode,
266};
267
268/* BUCKS 1, 6 */
269static const struct regulator_ops max77802_buck_16_dvs_ops = {
270 .list_voltage = regulator_list_voltage_linear,
271 .map_voltage = regulator_map_voltage_linear,
272 .is_enabled = regulator_is_enabled_regmap,
273 .enable = max77802_enable,
274 .disable = regulator_disable_regmap,
275 .get_voltage_sel = regulator_get_voltage_sel_regmap,
276 .set_voltage_sel = regulator_set_voltage_sel_regmap,
277 .set_voltage_time_sel = regulator_set_voltage_time_sel,
278 .set_ramp_delay = regulator_set_ramp_delay_regmap,
279 .set_suspend_disable = max77802_set_suspend_disable,
280};
281
282/* BUCKs 2-4 */
283static const struct regulator_ops max77802_buck_234_ops = {
284 .list_voltage = regulator_list_voltage_linear,
285 .map_voltage = regulator_map_voltage_linear,
286 .is_enabled = regulator_is_enabled_regmap,
287 .enable = max77802_enable,
288 .disable = regulator_disable_regmap,
289 .get_voltage_sel = regulator_get_voltage_sel_regmap,
290 .set_voltage_sel = regulator_set_voltage_sel_regmap,
291 .set_voltage_time_sel = regulator_set_voltage_time_sel,
292 .set_ramp_delay = regulator_set_ramp_delay_regmap,
293 .set_suspend_disable = max77802_set_suspend_disable,
294 .set_suspend_mode = max77802_set_suspend_mode,
295};
296
297/* BUCKs 5, 7-10 */
298static const struct regulator_ops max77802_buck_dvs_ops = {
299 .list_voltage = regulator_list_voltage_linear,
300 .map_voltage = regulator_map_voltage_linear,
301 .is_enabled = regulator_is_enabled_regmap,
302 .enable = max77802_enable,
303 .disable = regulator_disable_regmap,
304 .get_voltage_sel = regulator_get_voltage_sel_regmap,
305 .set_voltage_sel = regulator_set_voltage_sel_regmap,
306 .set_voltage_time_sel = regulator_set_voltage_time_sel,
307 .set_suspend_disable = max77802_set_suspend_disable,
308};
309
310/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
311#define regulator_77802_desc_p_ldo(num, supply, log) { \
312 .name = "LDO"#num, \
313 .of_match = of_match_ptr("LDO"#num), \
314 .regulators_node = of_match_ptr("regulators"), \
315 .id = MAX77802_LDO##num, \
316 .supply_name = "inl"#supply, \
317 .ops = &max77802_ldo_ops_logic##log, \
318 .type = REGULATOR_VOLTAGE, \
319 .owner = THIS_MODULE, \
320 .min_uV = 800000, \
321 .uV_step = 50000, \
322 .ramp_delay = MAX77802_RAMP_DELAY, \
323 .n_voltages = 1 << 6, \
324 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
325 .vsel_mask = MAX77802_VSEL_MASK, \
326 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
327 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
328 .of_map_mode = max77802_map_mode, \
329}
330
331/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
332#define regulator_77802_desc_n_ldo(num, supply, log) { \
333 .name = "LDO"#num, \
334 .of_match = of_match_ptr("LDO"#num), \
335 .regulators_node = of_match_ptr("regulators"), \
336 .id = MAX77802_LDO##num, \
337 .supply_name = "inl"#supply, \
338 .ops = &max77802_ldo_ops_logic##log, \
339 .type = REGULATOR_VOLTAGE, \
340 .owner = THIS_MODULE, \
341 .min_uV = 800000, \
342 .uV_step = 25000, \
343 .ramp_delay = MAX77802_RAMP_DELAY, \
344 .n_voltages = 1 << 6, \
345 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
346 .vsel_mask = MAX77802_VSEL_MASK, \
347 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
348 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
349 .of_map_mode = max77802_map_mode, \
350}
351
352/* BUCKs 1, 6 */
353#define regulator_77802_desc_16_buck(num) { \
354 .name = "BUCK"#num, \
355 .of_match = of_match_ptr("BUCK"#num), \
356 .regulators_node = of_match_ptr("regulators"), \
357 .id = MAX77802_BUCK##num, \
358 .supply_name = "inb"#num, \
359 .ops = &max77802_buck_16_dvs_ops, \
360 .type = REGULATOR_VOLTAGE, \
361 .owner = THIS_MODULE, \
362 .min_uV = 612500, \
363 .uV_step = 6250, \
364 .ramp_delay = MAX77802_RAMP_DELAY, \
365 .n_voltages = 1 << 8, \
366 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
367 .vsel_mask = MAX77802_DVS_VSEL_MASK, \
368 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
369 .enable_mask = MAX77802_OPMODE_MASK, \
370 .ramp_reg = MAX77802_REG_BUCK ## num ## CTRL, \
371 .ramp_mask = MAX77802_RAMP_RATE_MASK_4BIT, \
372 .ramp_delay_table = max77802_buck16_ramp_table, \
373 .n_ramp_values = ARRAY_SIZE(max77802_buck16_ramp_table), \
374 .of_map_mode = max77802_map_mode, \
375}
376
377/* BUCKS 2-4 */
378#define regulator_77802_desc_234_buck(num) { \
379 .name = "BUCK"#num, \
380 .of_match = of_match_ptr("BUCK"#num), \
381 .regulators_node = of_match_ptr("regulators"), \
382 .id = MAX77802_BUCK##num, \
383 .supply_name = "inb"#num, \
384 .ops = &max77802_buck_234_ops, \
385 .type = REGULATOR_VOLTAGE, \
386 .owner = THIS_MODULE, \
387 .min_uV = 600000, \
388 .uV_step = 6250, \
389 .ramp_delay = MAX77802_RAMP_DELAY, \
390 .n_voltages = 0x91, \
391 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
392 .vsel_mask = MAX77802_DVS_VSEL_MASK, \
393 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
394 .enable_mask = MAX77802_OPMODE_MASK << \
395 MAX77802_OPMODE_BUCK234_SHIFT, \
396 .ramp_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
397 .ramp_mask = MAX77802_RAMP_RATE_MASK_2BIT, \
398 .ramp_delay_table = max77802_buck234_ramp_table, \
399 .n_ramp_values = ARRAY_SIZE(max77802_buck234_ramp_table), \
400 .of_map_mode = max77802_map_mode, \
401}
402
403/* BUCK 5 */
404#define regulator_77802_desc_buck5(num) { \
405 .name = "BUCK"#num, \
406 .of_match = of_match_ptr("BUCK"#num), \
407 .regulators_node = of_match_ptr("regulators"), \
408 .id = MAX77802_BUCK##num, \
409 .supply_name = "inb"#num, \
410 .ops = &max77802_buck_dvs_ops, \
411 .type = REGULATOR_VOLTAGE, \
412 .owner = THIS_MODULE, \
413 .min_uV = 750000, \
414 .uV_step = 50000, \
415 .ramp_delay = MAX77802_RAMP_DELAY, \
416 .n_voltages = 1 << 6, \
417 .vsel_reg = MAX77802_REG_BUCK5OUT, \
418 .vsel_mask = MAX77802_VSEL_MASK, \
419 .enable_reg = MAX77802_REG_BUCK5CTRL, \
420 .enable_mask = MAX77802_OPMODE_MASK, \
421 .of_map_mode = max77802_map_mode, \
422}
423
424/* BUCKs 7-10 */
425#define regulator_77802_desc_buck7_10(num) { \
426 .name = "BUCK"#num, \
427 .of_match = of_match_ptr("BUCK"#num), \
428 .regulators_node = of_match_ptr("regulators"), \
429 .id = MAX77802_BUCK##num, \
430 .supply_name = "inb"#num, \
431 .ops = &max77802_buck_dvs_ops, \
432 .type = REGULATOR_VOLTAGE, \
433 .owner = THIS_MODULE, \
434 .min_uV = 750000, \
435 .uV_step = 50000, \
436 .ramp_delay = MAX77802_RAMP_DELAY, \
437 .n_voltages = 1 << 6, \
438 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
439 .vsel_mask = MAX77802_VSEL_MASK, \
440 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
441 .enable_mask = MAX77802_OPMODE_MASK, \
442 .of_map_mode = max77802_map_mode, \
443}
444
445static const struct regulator_desc regulators[] = {
446 regulator_77802_desc_16_buck(1),
447 regulator_77802_desc_234_buck(2),
448 regulator_77802_desc_234_buck(3),
449 regulator_77802_desc_234_buck(4),
450 regulator_77802_desc_buck5(5),
451 regulator_77802_desc_16_buck(6),
452 regulator_77802_desc_buck7_10(7),
453 regulator_77802_desc_buck7_10(8),
454 regulator_77802_desc_buck7_10(9),
455 regulator_77802_desc_buck7_10(10),
456 regulator_77802_desc_n_ldo(1, 10, 2),
457 regulator_77802_desc_n_ldo(2, 10, 1),
458 regulator_77802_desc_p_ldo(3, 3, 2),
459 regulator_77802_desc_p_ldo(4, 6, 1),
460 regulator_77802_desc_p_ldo(5, 3, 1),
461 regulator_77802_desc_p_ldo(6, 3, 1),
462 regulator_77802_desc_p_ldo(7, 3, 1),
463 regulator_77802_desc_n_ldo(8, 1, 1),
464 regulator_77802_desc_p_ldo(9, 5, 1),
465 regulator_77802_desc_p_ldo(10, 4, 1),
466 regulator_77802_desc_p_ldo(11, 4, 1),
467 regulator_77802_desc_p_ldo(12, 9, 1),
468 regulator_77802_desc_p_ldo(13, 4, 1),
469 regulator_77802_desc_p_ldo(14, 4, 1),
470 regulator_77802_desc_n_ldo(15, 1, 1),
471 regulator_77802_desc_n_ldo(17, 2, 1),
472 regulator_77802_desc_p_ldo(18, 7, 1),
473 regulator_77802_desc_p_ldo(19, 5, 1),
474 regulator_77802_desc_p_ldo(20, 7, 2),
475 regulator_77802_desc_p_ldo(21, 6, 2),
476 regulator_77802_desc_p_ldo(23, 9, 1),
477 regulator_77802_desc_p_ldo(24, 6, 1),
478 regulator_77802_desc_p_ldo(25, 9, 1),
479 regulator_77802_desc_p_ldo(26, 9, 1),
480 regulator_77802_desc_n_ldo(27, 2, 1),
481 regulator_77802_desc_p_ldo(28, 7, 1),
482 regulator_77802_desc_p_ldo(29, 7, 1),
483 regulator_77802_desc_n_ldo(30, 2, 1),
484 regulator_77802_desc_p_ldo(32, 9, 1),
485 regulator_77802_desc_p_ldo(33, 6, 1),
486 regulator_77802_desc_p_ldo(34, 9, 1),
487 regulator_77802_desc_n_ldo(35, 2, 1),
488};
489
490static int max77802_pmic_probe(struct platform_device *pdev)
491{
492 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
493 struct max77802_regulator_prv *max77802;
494 int i, val;
495 struct regulator_config config = { };
496
497 max77802 = devm_kzalloc(&pdev->dev,
498 sizeof(struct max77802_regulator_prv),
499 GFP_KERNEL);
500 if (!max77802)
501 return -ENOMEM;
502
503 config.dev = iodev->dev;
504 config.regmap = iodev->regmap;
505 config.driver_data = max77802;
506 platform_set_drvdata(pdev, max77802);
507
508 for (i = 0; i < MAX77802_REG_MAX; i++) {
509 struct regulator_dev *rdev;
510 unsigned int id = regulators[i].id;
511 int shift = max77802_get_opmode_shift(id);
512 int ret;
513
514 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
515 if (ret < 0) {
516 dev_warn(&pdev->dev,
517 "cannot read current mode for %d\n", i);
518 val = MAX77802_OPMODE_NORMAL;
519 } else {
520 val = val >> shift & MAX77802_OPMODE_MASK;
521 }
522
523 /*
524 * If the regulator is disabled and the system warm rebooted,
525 * the hardware reports OFF as the regulator operating mode.
526 * Default to operating mode NORMAL in that case.
527 */
528 if (id < ARRAY_SIZE(max77802->opmode)) {
529 if (val == MAX77802_STATUS_OFF)
530 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
531 else
532 max77802->opmode[id] = val;
533 }
534
535 rdev = devm_regulator_register(&pdev->dev,
536 ®ulators[i], &config);
537 if (IS_ERR(rdev)) {
538 ret = PTR_ERR(rdev);
539 dev_err(&pdev->dev,
540 "regulator init failed for %d: %d\n", i, ret);
541 return ret;
542 }
543 }
544
545 return 0;
546}
547
548static const struct platform_device_id max77802_pmic_id[] = {
549 {"max77802-pmic", 0},
550 { },
551};
552MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
553
554static struct platform_driver max77802_pmic_driver = {
555 .driver = {
556 .name = "max77802-pmic",
557 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
558 },
559 .probe = max77802_pmic_probe,
560 .id_table = max77802_pmic_id,
561};
562
563module_platform_driver(max77802_pmic_driver);
564
565MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
566MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
567MODULE_LICENSE("GPL");