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
max77802_map_mode(unsigned int mode)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
max77802_get_opmode_shift(int id)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 */
max77802_set_suspend_disable(struct regulator_dev * rdev)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 unsigned int id = rdev_get_id(rdev);
101 int shift = max77802_get_opmode_shift(id);
102
103 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
104 return -EINVAL;
105 max77802->opmode[id] = val;
106 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
107 rdev->desc->enable_mask, val << shift);
108 }
109
110 /*
111 * Some LDOs support Low Power Mode while the system is running.
112 *
113 * LDOs 1, 3, 20, 21.
114 */
max77802_set_mode(struct regulator_dev * rdev,unsigned int mode)115 static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
116 {
117 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
118 unsigned int id = rdev_get_id(rdev);
119 unsigned int val;
120 int shift = max77802_get_opmode_shift(id);
121
122 switch (mode) {
123 case REGULATOR_MODE_STANDBY:
124 val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
125 break;
126 case REGULATOR_MODE_NORMAL:
127 val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
128 break;
129 default:
130 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
131 rdev->desc->name, mode);
132 return -EINVAL;
133 }
134
135 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
136 return -EINVAL;
137
138 max77802->opmode[id] = val;
139 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
140 rdev->desc->enable_mask, val << shift);
141 }
142
max77802_get_mode(struct regulator_dev * rdev)143 static unsigned max77802_get_mode(struct regulator_dev *rdev)
144 {
145 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
146 unsigned int id = rdev_get_id(rdev);
147
148 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
149 return -EINVAL;
150 return max77802_map_mode(max77802->opmode[id]);
151 }
152
153 /**
154 * max77802_set_suspend_mode - set regulator opmode when the system is suspended
155 * @rdev: regulator to change mode
156 * @mode: operating mode to be set
157 *
158 * Will set the operating mode for the regulators during system suspend.
159 * This function is valid for the three different enable control logics:
160 *
161 * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
162 * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
163 * Enable Control Logic3 by PWRREQ (LDO 3)
164 *
165 * If setting the regulator mode fails, the function only warns but does
166 * not return an error code to avoid the regulator core to stop setting
167 * the operating mode for the remaining regulators.
168 */
max77802_set_suspend_mode(struct regulator_dev * rdev,unsigned int mode)169 static int max77802_set_suspend_mode(struct regulator_dev *rdev,
170 unsigned int mode)
171 {
172 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
173 unsigned int id = rdev_get_id(rdev);
174 unsigned int val;
175 int shift = max77802_get_opmode_shift(id);
176
177 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
178 return -EINVAL;
179
180 /*
181 * If the regulator has been disabled for suspend
182 * then is invalid to try setting a suspend mode.
183 */
184 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
185 dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
186 rdev->desc->name, mode);
187 return 0;
188 }
189
190 switch (mode) {
191 case REGULATOR_MODE_STANDBY:
192 /*
193 * If the regulator opmode is normal then enable
194 * ON in Low Power Mode by PWRREQ. If the mode is
195 * already Low Power then no action is required.
196 */
197 if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
198 val = MAX77802_LP_PWRREQ;
199 else
200 return 0;
201 break;
202 case REGULATOR_MODE_NORMAL:
203 /*
204 * If the regulator operating mode is Low Power then
205 * normal is not a valid opmode in suspend. If the
206 * mode is already normal then no action is required.
207 */
208 if (max77802->opmode[id] == MAX77802_OPMODE_LP)
209 dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
210 rdev->desc->name, mode);
211 return 0;
212 default:
213 dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
214 rdev->desc->name, mode);
215 return -EINVAL;
216 }
217
218 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
219 rdev->desc->enable_mask, val << shift);
220 }
221
max77802_enable(struct regulator_dev * rdev)222 static int max77802_enable(struct regulator_dev *rdev)
223 {
224 struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
225 unsigned int id = rdev_get_id(rdev);
226 int shift = max77802_get_opmode_shift(id);
227
228 if (WARN_ON_ONCE(id >= ARRAY_SIZE(max77802->opmode)))
229 return -EINVAL;
230 if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
231 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
232
233 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
234 rdev->desc->enable_mask,
235 max77802->opmode[id] << shift);
236 }
237
max77802_find_ramp_value(struct regulator_dev * rdev,const unsigned int limits[],int size,unsigned int ramp_delay)238 static int max77802_find_ramp_value(struct regulator_dev *rdev,
239 const unsigned int limits[], int size,
240 unsigned int ramp_delay)
241 {
242 int i;
243
244 for (i = 0; i < size; i++) {
245 if (ramp_delay <= limits[i])
246 return i;
247 }
248
249 /* Use maximum value for no ramp control */
250 dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
251 rdev->desc->name, ramp_delay);
252 return size - 1;
253 }
254
255 /* Used for BUCKs 2-4 */
max77802_set_ramp_delay_2bit(struct regulator_dev * rdev,int ramp_delay)256 static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
257 int ramp_delay)
258 {
259 int id = rdev_get_id(rdev);
260 unsigned int ramp_value;
261
262 if (id > MAX77802_BUCK4) {
263 dev_warn(&rdev->dev,
264 "%s: regulator: ramp delay not supported\n",
265 rdev->desc->name);
266 return -EINVAL;
267 }
268 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
269 ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
270
271 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
272 MAX77802_RAMP_RATE_MASK_2BIT,
273 ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
274 }
275
276 /* For BUCK1, 6 */
max77802_set_ramp_delay_4bit(struct regulator_dev * rdev,int ramp_delay)277 static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
278 int ramp_delay)
279 {
280 unsigned int ramp_value;
281
282 ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
283 ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
284
285 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
286 MAX77802_RAMP_RATE_MASK_4BIT,
287 ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
288 }
289
290 /*
291 * LDOs 2, 4-19, 22-35
292 */
293 static const struct regulator_ops max77802_ldo_ops_logic1 = {
294 .list_voltage = regulator_list_voltage_linear,
295 .map_voltage = regulator_map_voltage_linear,
296 .is_enabled = regulator_is_enabled_regmap,
297 .enable = max77802_enable,
298 .disable = regulator_disable_regmap,
299 .get_voltage_sel = regulator_get_voltage_sel_regmap,
300 .set_voltage_sel = regulator_set_voltage_sel_regmap,
301 .set_voltage_time_sel = regulator_set_voltage_time_sel,
302 .set_suspend_disable = max77802_set_suspend_disable,
303 .set_suspend_mode = max77802_set_suspend_mode,
304 };
305
306 /*
307 * LDOs 1, 20, 21, 3
308 */
309 static const struct regulator_ops max77802_ldo_ops_logic2 = {
310 .list_voltage = regulator_list_voltage_linear,
311 .map_voltage = regulator_map_voltage_linear,
312 .is_enabled = regulator_is_enabled_regmap,
313 .enable = max77802_enable,
314 .disable = regulator_disable_regmap,
315 .get_voltage_sel = regulator_get_voltage_sel_regmap,
316 .set_voltage_sel = regulator_set_voltage_sel_regmap,
317 .set_voltage_time_sel = regulator_set_voltage_time_sel,
318 .set_mode = max77802_set_mode,
319 .get_mode = max77802_get_mode,
320 .set_suspend_mode = max77802_set_suspend_mode,
321 };
322
323 /* BUCKS 1, 6 */
324 static const struct regulator_ops max77802_buck_16_dvs_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_4bit,
334 .set_suspend_disable = max77802_set_suspend_disable,
335 };
336
337 /* BUCKs 2-4 */
338 static const struct regulator_ops max77802_buck_234_ops = {
339 .list_voltage = regulator_list_voltage_linear,
340 .map_voltage = regulator_map_voltage_linear,
341 .is_enabled = regulator_is_enabled_regmap,
342 .enable = max77802_enable,
343 .disable = regulator_disable_regmap,
344 .get_voltage_sel = regulator_get_voltage_sel_regmap,
345 .set_voltage_sel = regulator_set_voltage_sel_regmap,
346 .set_voltage_time_sel = regulator_set_voltage_time_sel,
347 .set_ramp_delay = max77802_set_ramp_delay_2bit,
348 .set_suspend_disable = max77802_set_suspend_disable,
349 .set_suspend_mode = max77802_set_suspend_mode,
350 };
351
352 /* BUCKs 5, 7-10 */
353 static const struct regulator_ops max77802_buck_dvs_ops = {
354 .list_voltage = regulator_list_voltage_linear,
355 .map_voltage = regulator_map_voltage_linear,
356 .is_enabled = regulator_is_enabled_regmap,
357 .enable = max77802_enable,
358 .disable = regulator_disable_regmap,
359 .get_voltage_sel = regulator_get_voltage_sel_regmap,
360 .set_voltage_sel = regulator_set_voltage_sel_regmap,
361 .set_voltage_time_sel = regulator_set_voltage_time_sel,
362 .set_ramp_delay = max77802_set_ramp_delay_2bit,
363 .set_suspend_disable = max77802_set_suspend_disable,
364 };
365
366 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
367 #define regulator_77802_desc_p_ldo(num, supply, log) { \
368 .name = "LDO"#num, \
369 .of_match = of_match_ptr("LDO"#num), \
370 .regulators_node = of_match_ptr("regulators"), \
371 .id = MAX77802_LDO##num, \
372 .supply_name = "inl"#supply, \
373 .ops = &max77802_ldo_ops_logic##log, \
374 .type = REGULATOR_VOLTAGE, \
375 .owner = THIS_MODULE, \
376 .min_uV = 800000, \
377 .uV_step = 50000, \
378 .ramp_delay = MAX77802_RAMP_DELAY, \
379 .n_voltages = 1 << 6, \
380 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
381 .vsel_mask = MAX77802_VSEL_MASK, \
382 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
383 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
384 .of_map_mode = max77802_map_mode, \
385 }
386
387 /* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
388 #define regulator_77802_desc_n_ldo(num, supply, log) { \
389 .name = "LDO"#num, \
390 .of_match = of_match_ptr("LDO"#num), \
391 .regulators_node = of_match_ptr("regulators"), \
392 .id = MAX77802_LDO##num, \
393 .supply_name = "inl"#supply, \
394 .ops = &max77802_ldo_ops_logic##log, \
395 .type = REGULATOR_VOLTAGE, \
396 .owner = THIS_MODULE, \
397 .min_uV = 800000, \
398 .uV_step = 25000, \
399 .ramp_delay = MAX77802_RAMP_DELAY, \
400 .n_voltages = 1 << 6, \
401 .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
402 .vsel_mask = MAX77802_VSEL_MASK, \
403 .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
404 .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
405 .of_map_mode = max77802_map_mode, \
406 }
407
408 /* BUCKs 1, 6 */
409 #define regulator_77802_desc_16_buck(num) { \
410 .name = "BUCK"#num, \
411 .of_match = of_match_ptr("BUCK"#num), \
412 .regulators_node = of_match_ptr("regulators"), \
413 .id = MAX77802_BUCK##num, \
414 .supply_name = "inb"#num, \
415 .ops = &max77802_buck_16_dvs_ops, \
416 .type = REGULATOR_VOLTAGE, \
417 .owner = THIS_MODULE, \
418 .min_uV = 612500, \
419 .uV_step = 6250, \
420 .ramp_delay = MAX77802_RAMP_DELAY, \
421 .n_voltages = 1 << 8, \
422 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
423 .vsel_mask = MAX77802_DVS_VSEL_MASK, \
424 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
425 .enable_mask = MAX77802_OPMODE_MASK, \
426 .of_map_mode = max77802_map_mode, \
427 }
428
429 /* BUCKS 2-4 */
430 #define regulator_77802_desc_234_buck(num) { \
431 .name = "BUCK"#num, \
432 .of_match = of_match_ptr("BUCK"#num), \
433 .regulators_node = of_match_ptr("regulators"), \
434 .id = MAX77802_BUCK##num, \
435 .supply_name = "inb"#num, \
436 .ops = &max77802_buck_234_ops, \
437 .type = REGULATOR_VOLTAGE, \
438 .owner = THIS_MODULE, \
439 .min_uV = 600000, \
440 .uV_step = 6250, \
441 .ramp_delay = MAX77802_RAMP_DELAY, \
442 .n_voltages = 0x91, \
443 .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
444 .vsel_mask = MAX77802_DVS_VSEL_MASK, \
445 .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
446 .enable_mask = MAX77802_OPMODE_MASK << \
447 MAX77802_OPMODE_BUCK234_SHIFT, \
448 .of_map_mode = max77802_map_mode, \
449 }
450
451 /* BUCK 5 */
452 #define regulator_77802_desc_buck5(num) { \
453 .name = "BUCK"#num, \
454 .of_match = of_match_ptr("BUCK"#num), \
455 .regulators_node = of_match_ptr("regulators"), \
456 .id = MAX77802_BUCK##num, \
457 .supply_name = "inb"#num, \
458 .ops = &max77802_buck_dvs_ops, \
459 .type = REGULATOR_VOLTAGE, \
460 .owner = THIS_MODULE, \
461 .min_uV = 750000, \
462 .uV_step = 50000, \
463 .ramp_delay = MAX77802_RAMP_DELAY, \
464 .n_voltages = 1 << 6, \
465 .vsel_reg = MAX77802_REG_BUCK5OUT, \
466 .vsel_mask = MAX77802_VSEL_MASK, \
467 .enable_reg = MAX77802_REG_BUCK5CTRL, \
468 .enable_mask = MAX77802_OPMODE_MASK, \
469 .of_map_mode = max77802_map_mode, \
470 }
471
472 /* BUCKs 7-10 */
473 #define regulator_77802_desc_buck7_10(num) { \
474 .name = "BUCK"#num, \
475 .of_match = of_match_ptr("BUCK"#num), \
476 .regulators_node = of_match_ptr("regulators"), \
477 .id = MAX77802_BUCK##num, \
478 .supply_name = "inb"#num, \
479 .ops = &max77802_buck_dvs_ops, \
480 .type = REGULATOR_VOLTAGE, \
481 .owner = THIS_MODULE, \
482 .min_uV = 750000, \
483 .uV_step = 50000, \
484 .ramp_delay = MAX77802_RAMP_DELAY, \
485 .n_voltages = 1 << 6, \
486 .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
487 .vsel_mask = MAX77802_VSEL_MASK, \
488 .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
489 .enable_mask = MAX77802_OPMODE_MASK, \
490 .of_map_mode = max77802_map_mode, \
491 }
492
493 static const struct regulator_desc regulators[] = {
494 regulator_77802_desc_16_buck(1),
495 regulator_77802_desc_234_buck(2),
496 regulator_77802_desc_234_buck(3),
497 regulator_77802_desc_234_buck(4),
498 regulator_77802_desc_buck5(5),
499 regulator_77802_desc_16_buck(6),
500 regulator_77802_desc_buck7_10(7),
501 regulator_77802_desc_buck7_10(8),
502 regulator_77802_desc_buck7_10(9),
503 regulator_77802_desc_buck7_10(10),
504 regulator_77802_desc_n_ldo(1, 10, 2),
505 regulator_77802_desc_n_ldo(2, 10, 1),
506 regulator_77802_desc_p_ldo(3, 3, 2),
507 regulator_77802_desc_p_ldo(4, 6, 1),
508 regulator_77802_desc_p_ldo(5, 3, 1),
509 regulator_77802_desc_p_ldo(6, 3, 1),
510 regulator_77802_desc_p_ldo(7, 3, 1),
511 regulator_77802_desc_n_ldo(8, 1, 1),
512 regulator_77802_desc_p_ldo(9, 5, 1),
513 regulator_77802_desc_p_ldo(10, 4, 1),
514 regulator_77802_desc_p_ldo(11, 4, 1),
515 regulator_77802_desc_p_ldo(12, 9, 1),
516 regulator_77802_desc_p_ldo(13, 4, 1),
517 regulator_77802_desc_p_ldo(14, 4, 1),
518 regulator_77802_desc_n_ldo(15, 1, 1),
519 regulator_77802_desc_n_ldo(17, 2, 1),
520 regulator_77802_desc_p_ldo(18, 7, 1),
521 regulator_77802_desc_p_ldo(19, 5, 1),
522 regulator_77802_desc_p_ldo(20, 7, 2),
523 regulator_77802_desc_p_ldo(21, 6, 2),
524 regulator_77802_desc_p_ldo(23, 9, 1),
525 regulator_77802_desc_p_ldo(24, 6, 1),
526 regulator_77802_desc_p_ldo(25, 9, 1),
527 regulator_77802_desc_p_ldo(26, 9, 1),
528 regulator_77802_desc_n_ldo(27, 2, 1),
529 regulator_77802_desc_p_ldo(28, 7, 1),
530 regulator_77802_desc_p_ldo(29, 7, 1),
531 regulator_77802_desc_n_ldo(30, 2, 1),
532 regulator_77802_desc_p_ldo(32, 9, 1),
533 regulator_77802_desc_p_ldo(33, 6, 1),
534 regulator_77802_desc_p_ldo(34, 9, 1),
535 regulator_77802_desc_n_ldo(35, 2, 1),
536 };
537
max77802_pmic_probe(struct platform_device * pdev)538 static int max77802_pmic_probe(struct platform_device *pdev)
539 {
540 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
541 struct max77802_regulator_prv *max77802;
542 int i, val;
543 struct regulator_config config = { };
544
545 max77802 = devm_kzalloc(&pdev->dev,
546 sizeof(struct max77802_regulator_prv),
547 GFP_KERNEL);
548 if (!max77802)
549 return -ENOMEM;
550
551 config.dev = iodev->dev;
552 config.regmap = iodev->regmap;
553 config.driver_data = max77802;
554 platform_set_drvdata(pdev, max77802);
555
556 for (i = 0; i < MAX77802_REG_MAX; i++) {
557 struct regulator_dev *rdev;
558 unsigned int id = regulators[i].id;
559 int shift = max77802_get_opmode_shift(id);
560 int ret;
561
562 ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
563 if (ret < 0) {
564 dev_warn(&pdev->dev,
565 "cannot read current mode for %d\n", i);
566 val = MAX77802_OPMODE_NORMAL;
567 } else {
568 val = val >> shift & MAX77802_OPMODE_MASK;
569 }
570
571 /*
572 * If the regulator is disabled and the system warm rebooted,
573 * the hardware reports OFF as the regulator operating mode.
574 * Default to operating mode NORMAL in that case.
575 */
576 if (id < ARRAY_SIZE(max77802->opmode)) {
577 if (val == MAX77802_STATUS_OFF)
578 max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
579 else
580 max77802->opmode[id] = val;
581 }
582
583 rdev = devm_regulator_register(&pdev->dev,
584 ®ulators[i], &config);
585 if (IS_ERR(rdev)) {
586 ret = PTR_ERR(rdev);
587 dev_err(&pdev->dev,
588 "regulator init failed for %d: %d\n", i, ret);
589 return ret;
590 }
591 }
592
593 return 0;
594 }
595
596 static const struct platform_device_id max77802_pmic_id[] = {
597 {"max77802-pmic", 0},
598 { },
599 };
600 MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
601
602 static struct platform_driver max77802_pmic_driver = {
603 .driver = {
604 .name = "max77802-pmic",
605 },
606 .probe = max77802_pmic_probe,
607 .id_table = max77802_pmic_id,
608 };
609
610 module_platform_driver(max77802_pmic_driver);
611
612 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
613 MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
614 MODULE_LICENSE("GPL");
615