1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // |
3 | // FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver. |
4 | // |
5 | // Supported Part Numbers: |
6 | // FAN53555UC00X/01X/03X/04X/05X |
7 | // |
8 | // Copyright (c) 2012 Marvell Technology Ltd. |
9 | // Yunfan Zhang <yfzhang@marvell.com> |
10 | |
11 | #include <linux/bitops.h> |
12 | #include <linux/err.h> |
13 | #include <linux/i2c.h> |
14 | #include <linux/module.h> |
15 | #include <linux/of.h> |
16 | #include <linux/param.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/regmap.h> |
19 | #include <linux/regulator/driver.h> |
20 | #include <linux/regulator/fan53555.h> |
21 | #include <linux/regulator/machine.h> |
22 | #include <linux/regulator/of_regulator.h> |
23 | #include <linux/slab.h> |
24 | |
25 | /* Voltage setting */ |
26 | #define FAN53555_VSEL0 0x00 |
27 | #define FAN53555_VSEL1 0x01 |
28 | |
29 | #define RK8602_VSEL0 0x06 |
30 | #define RK8602_VSEL1 0x07 |
31 | |
32 | #define TCS4525_VSEL0 0x11 |
33 | #define TCS4525_VSEL1 0x10 |
34 | #define TCS4525_TIME 0x13 |
35 | #define TCS4525_COMMAND 0x14 |
36 | |
37 | /* Control register */ |
38 | #define FAN53555_CONTROL 0x02 |
39 | /* IC Type */ |
40 | #define FAN53555_ID1 0x03 |
41 | /* IC mask version */ |
42 | #define FAN53555_ID2 0x04 |
43 | /* Monitor register */ |
44 | #define FAN53555_MONITOR 0x05 |
45 | |
46 | /* VSEL bit definitions */ |
47 | #define VSEL_BUCK_EN BIT(7) |
48 | #define VSEL_MODE BIT(6) |
49 | /* Chip ID and Verison */ |
50 | #define DIE_ID 0x0F /* ID1 */ |
51 | #define DIE_REV 0x0F /* ID2 */ |
52 | /* Control bit definitions */ |
53 | #define CTL_OUTPUT_DISCHG BIT(7) |
54 | #define CTL_SLEW_MASK GENMASK(6, 4) |
55 | #define CTL_RESET BIT(2) |
56 | #define CTL_MODE_VSEL0_MODE BIT(0) |
57 | #define CTL_MODE_VSEL1_MODE BIT(1) |
58 | |
59 | #define FAN53555_NVOLTAGES 64 /* Numbers of voltages */ |
60 | #define FAN53526_NVOLTAGES 128 |
61 | #define RK8602_NVOLTAGES 160 |
62 | |
63 | #define TCS_VSEL0_MODE BIT(7) |
64 | #define TCS_VSEL1_MODE BIT(6) |
65 | |
66 | #define TCS_SLEW_MASK GENMASK(4, 3) |
67 | |
68 | enum fan53555_vendor { |
69 | FAN53526_VENDOR_FAIRCHILD = 0, |
70 | FAN53555_VENDOR_FAIRCHILD, |
71 | FAN53555_VENDOR_ROCKCHIP, /* RK8600, RK8601 */ |
72 | RK8602_VENDOR_ROCKCHIP, /* RK8602, RK8603 */ |
73 | FAN53555_VENDOR_SILERGY, |
74 | FAN53526_VENDOR_TCS, |
75 | }; |
76 | |
77 | enum { |
78 | FAN53526_CHIP_ID_01 = 1, |
79 | }; |
80 | |
81 | enum { |
82 | FAN53526_CHIP_REV_08 = 8, |
83 | }; |
84 | |
85 | /* IC Type */ |
86 | enum { |
87 | FAN53555_CHIP_ID_00 = 0, |
88 | FAN53555_CHIP_ID_01, |
89 | FAN53555_CHIP_ID_02, |
90 | FAN53555_CHIP_ID_03, |
91 | FAN53555_CHIP_ID_04, |
92 | FAN53555_CHIP_ID_05, |
93 | FAN53555_CHIP_ID_08 = 8, |
94 | }; |
95 | |
96 | enum { |
97 | RK8600_CHIP_ID_08 = 8, /* RK8600, RK8601 */ |
98 | }; |
99 | |
100 | enum { |
101 | RK8602_CHIP_ID_10 = 10, /* RK8602, RK8603 */ |
102 | }; |
103 | |
104 | enum { |
105 | TCS4525_CHIP_ID_12 = 12, |
106 | }; |
107 | |
108 | enum { |
109 | TCS4526_CHIP_ID_00 = 0, |
110 | }; |
111 | |
112 | /* IC mask revision */ |
113 | enum { |
114 | FAN53555_CHIP_REV_00 = 0x3, |
115 | FAN53555_CHIP_REV_13 = 0xf, |
116 | }; |
117 | |
118 | enum { |
119 | SILERGY_SYR82X = 8, |
120 | SILERGY_SYR83X = 9, |
121 | }; |
122 | |
123 | struct fan53555_device_info { |
124 | enum fan53555_vendor vendor; |
125 | struct device *dev; |
126 | struct regulator_desc desc; |
127 | struct regulator_init_data *regulator; |
128 | /* IC Type and Rev */ |
129 | int chip_id; |
130 | int chip_rev; |
131 | /* Voltage setting register */ |
132 | unsigned int vol_reg; |
133 | unsigned int sleep_reg; |
134 | unsigned int en_reg; |
135 | unsigned int sleep_en_reg; |
136 | /* Voltage range and step(linear) */ |
137 | unsigned int vsel_min; |
138 | unsigned int vsel_step; |
139 | unsigned int vsel_count; |
140 | /* Mode */ |
141 | unsigned int mode_reg; |
142 | unsigned int mode_mask; |
143 | /* Sleep voltage cache */ |
144 | unsigned int sleep_vol_cache; |
145 | /* Slew rate */ |
146 | unsigned int slew_reg; |
147 | unsigned int slew_mask; |
148 | const unsigned int *ramp_delay_table; |
149 | unsigned int n_ramp_values; |
150 | unsigned int slew_rate; |
151 | }; |
152 | |
153 | static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV) |
154 | { |
155 | struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
156 | int ret; |
157 | |
158 | if (di->sleep_vol_cache == uV) |
159 | return 0; |
160 | ret = regulator_map_voltage_linear(rdev, min_uV: uV, max_uV: uV); |
161 | if (ret < 0) |
162 | return ret; |
163 | ret = regmap_update_bits(map: rdev->regmap, reg: di->sleep_reg, |
164 | mask: di->desc.vsel_mask, val: ret); |
165 | if (ret < 0) |
166 | return ret; |
167 | /* Cache the sleep voltage setting. |
168 | * Might not be the real voltage which is rounded */ |
169 | di->sleep_vol_cache = uV; |
170 | |
171 | return 0; |
172 | } |
173 | |
174 | static int fan53555_set_suspend_enable(struct regulator_dev *rdev) |
175 | { |
176 | struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
177 | |
178 | return regmap_update_bits(map: rdev->regmap, reg: di->sleep_en_reg, |
179 | VSEL_BUCK_EN, VSEL_BUCK_EN); |
180 | } |
181 | |
182 | static int fan53555_set_suspend_disable(struct regulator_dev *rdev) |
183 | { |
184 | struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
185 | |
186 | return regmap_update_bits(map: rdev->regmap, reg: di->sleep_en_reg, |
187 | VSEL_BUCK_EN, val: 0); |
188 | } |
189 | |
190 | static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode) |
191 | { |
192 | struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
193 | |
194 | switch (mode) { |
195 | case REGULATOR_MODE_FAST: |
196 | regmap_update_bits(map: rdev->regmap, reg: di->mode_reg, |
197 | mask: di->mode_mask, val: di->mode_mask); |
198 | break; |
199 | case REGULATOR_MODE_NORMAL: |
200 | regmap_update_bits(map: rdev->regmap, reg: di->vol_reg, mask: di->mode_mask, val: 0); |
201 | break; |
202 | default: |
203 | return -EINVAL; |
204 | } |
205 | return 0; |
206 | } |
207 | |
208 | static unsigned int fan53555_get_mode(struct regulator_dev *rdev) |
209 | { |
210 | struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
211 | unsigned int val; |
212 | int ret = 0; |
213 | |
214 | ret = regmap_read(map: rdev->regmap, reg: di->mode_reg, val: &val); |
215 | if (ret < 0) |
216 | return ret; |
217 | if (val & di->mode_mask) |
218 | return REGULATOR_MODE_FAST; |
219 | else |
220 | return REGULATOR_MODE_NORMAL; |
221 | } |
222 | |
223 | static const unsigned int slew_rates[] = { |
224 | 64000, |
225 | 32000, |
226 | 16000, |
227 | 8000, |
228 | 4000, |
229 | 2000, |
230 | 1000, |
231 | 500, |
232 | }; |
233 | |
234 | static const unsigned int tcs_slew_rates[] = { |
235 | 18700, |
236 | 9300, |
237 | 4600, |
238 | 2300, |
239 | }; |
240 | |
241 | static const struct regulator_ops fan53555_regulator_ops = { |
242 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
243 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
244 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
245 | .map_voltage = regulator_map_voltage_linear, |
246 | .list_voltage = regulator_list_voltage_linear, |
247 | .set_suspend_voltage = fan53555_set_suspend_voltage, |
248 | .enable = regulator_enable_regmap, |
249 | .disable = regulator_disable_regmap, |
250 | .is_enabled = regulator_is_enabled_regmap, |
251 | .set_mode = fan53555_set_mode, |
252 | .get_mode = fan53555_get_mode, |
253 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
254 | .set_suspend_enable = fan53555_set_suspend_enable, |
255 | .set_suspend_disable = fan53555_set_suspend_disable, |
256 | }; |
257 | |
258 | static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di) |
259 | { |
260 | /* Init voltage range and step */ |
261 | switch (di->chip_id) { |
262 | case FAN53526_CHIP_ID_01: |
263 | switch (di->chip_rev) { |
264 | case FAN53526_CHIP_REV_08: |
265 | di->vsel_min = 600000; |
266 | di->vsel_step = 6250; |
267 | break; |
268 | default: |
269 | dev_err(di->dev, |
270 | "Chip ID %d with rev %d not supported!\n" , |
271 | di->chip_id, di->chip_rev); |
272 | return -EINVAL; |
273 | } |
274 | break; |
275 | default: |
276 | dev_err(di->dev, |
277 | "Chip ID %d not supported!\n" , di->chip_id); |
278 | return -EINVAL; |
279 | } |
280 | |
281 | di->slew_reg = FAN53555_CONTROL; |
282 | di->slew_mask = CTL_SLEW_MASK; |
283 | di->ramp_delay_table = slew_rates; |
284 | di->n_ramp_values = ARRAY_SIZE(slew_rates); |
285 | di->vsel_count = FAN53526_NVOLTAGES; |
286 | |
287 | return 0; |
288 | } |
289 | |
290 | static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di) |
291 | { |
292 | /* Init voltage range and step */ |
293 | switch (di->chip_id) { |
294 | case FAN53555_CHIP_ID_00: |
295 | switch (di->chip_rev) { |
296 | case FAN53555_CHIP_REV_00: |
297 | di->vsel_min = 600000; |
298 | di->vsel_step = 10000; |
299 | break; |
300 | case FAN53555_CHIP_REV_13: |
301 | di->vsel_min = 800000; |
302 | di->vsel_step = 10000; |
303 | break; |
304 | default: |
305 | dev_err(di->dev, |
306 | "Chip ID %d with rev %d not supported!\n" , |
307 | di->chip_id, di->chip_rev); |
308 | return -EINVAL; |
309 | } |
310 | break; |
311 | case FAN53555_CHIP_ID_01: |
312 | case FAN53555_CHIP_ID_03: |
313 | case FAN53555_CHIP_ID_05: |
314 | case FAN53555_CHIP_ID_08: |
315 | di->vsel_min = 600000; |
316 | di->vsel_step = 10000; |
317 | break; |
318 | case FAN53555_CHIP_ID_04: |
319 | di->vsel_min = 603000; |
320 | di->vsel_step = 12826; |
321 | break; |
322 | default: |
323 | dev_err(di->dev, |
324 | "Chip ID %d not supported!\n" , di->chip_id); |
325 | return -EINVAL; |
326 | } |
327 | di->slew_reg = FAN53555_CONTROL; |
328 | di->slew_mask = CTL_SLEW_MASK; |
329 | di->ramp_delay_table = slew_rates; |
330 | di->n_ramp_values = ARRAY_SIZE(slew_rates); |
331 | di->vsel_count = FAN53555_NVOLTAGES; |
332 | |
333 | return 0; |
334 | } |
335 | |
336 | static int fan53555_voltages_setup_rockchip(struct fan53555_device_info *di) |
337 | { |
338 | /* Init voltage range and step */ |
339 | switch (di->chip_id) { |
340 | case RK8600_CHIP_ID_08: |
341 | di->vsel_min = 712500; |
342 | di->vsel_step = 12500; |
343 | break; |
344 | default: |
345 | dev_err(di->dev, |
346 | "Chip ID %d not supported!\n" , di->chip_id); |
347 | return -EINVAL; |
348 | } |
349 | di->slew_reg = FAN53555_CONTROL; |
350 | di->slew_mask = CTL_SLEW_MASK; |
351 | di->ramp_delay_table = slew_rates; |
352 | di->n_ramp_values = ARRAY_SIZE(slew_rates); |
353 | di->vsel_count = FAN53555_NVOLTAGES; |
354 | |
355 | return 0; |
356 | } |
357 | |
358 | static int rk8602_voltages_setup_rockchip(struct fan53555_device_info *di) |
359 | { |
360 | /* Init voltage range and step */ |
361 | switch (di->chip_id) { |
362 | case RK8602_CHIP_ID_10: |
363 | di->vsel_min = 500000; |
364 | di->vsel_step = 6250; |
365 | break; |
366 | default: |
367 | dev_err(di->dev, |
368 | "Chip ID %d not supported!\n" , di->chip_id); |
369 | return -EINVAL; |
370 | } |
371 | di->slew_reg = FAN53555_CONTROL; |
372 | di->slew_mask = CTL_SLEW_MASK; |
373 | di->ramp_delay_table = slew_rates; |
374 | di->n_ramp_values = ARRAY_SIZE(slew_rates); |
375 | di->vsel_count = RK8602_NVOLTAGES; |
376 | |
377 | return 0; |
378 | } |
379 | |
380 | static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di) |
381 | { |
382 | /* Init voltage range and step */ |
383 | switch (di->chip_id) { |
384 | case SILERGY_SYR82X: |
385 | case SILERGY_SYR83X: |
386 | di->vsel_min = 712500; |
387 | di->vsel_step = 12500; |
388 | break; |
389 | default: |
390 | dev_err(di->dev, |
391 | "Chip ID %d not supported!\n" , di->chip_id); |
392 | return -EINVAL; |
393 | } |
394 | di->slew_reg = FAN53555_CONTROL; |
395 | di->slew_mask = CTL_SLEW_MASK; |
396 | di->ramp_delay_table = slew_rates; |
397 | di->n_ramp_values = ARRAY_SIZE(slew_rates); |
398 | di->vsel_count = FAN53555_NVOLTAGES; |
399 | |
400 | return 0; |
401 | } |
402 | |
403 | static int fan53526_voltages_setup_tcs(struct fan53555_device_info *di) |
404 | { |
405 | switch (di->chip_id) { |
406 | case TCS4525_CHIP_ID_12: |
407 | case TCS4526_CHIP_ID_00: |
408 | di->slew_reg = TCS4525_TIME; |
409 | di->slew_mask = TCS_SLEW_MASK; |
410 | di->ramp_delay_table = tcs_slew_rates; |
411 | di->n_ramp_values = ARRAY_SIZE(tcs_slew_rates); |
412 | |
413 | /* Init voltage range and step */ |
414 | di->vsel_min = 600000; |
415 | di->vsel_step = 6250; |
416 | di->vsel_count = FAN53526_NVOLTAGES; |
417 | break; |
418 | default: |
419 | dev_err(di->dev, "Chip ID %d not supported!\n" , di->chip_id); |
420 | return -EINVAL; |
421 | } |
422 | |
423 | return 0; |
424 | } |
425 | |
426 | /* For 00,01,03,05 options: |
427 | * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V. |
428 | * For 04 option: |
429 | * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V. |
430 | * */ |
431 | static int fan53555_device_setup(struct fan53555_device_info *di, |
432 | struct fan53555_platform_data *pdata) |
433 | { |
434 | int ret = 0; |
435 | |
436 | /* Setup voltage control register */ |
437 | switch (di->vendor) { |
438 | case FAN53526_VENDOR_FAIRCHILD: |
439 | case FAN53555_VENDOR_FAIRCHILD: |
440 | case FAN53555_VENDOR_ROCKCHIP: |
441 | case FAN53555_VENDOR_SILERGY: |
442 | switch (pdata->sleep_vsel_id) { |
443 | case FAN53555_VSEL_ID_0: |
444 | di->sleep_reg = FAN53555_VSEL0; |
445 | di->vol_reg = FAN53555_VSEL1; |
446 | break; |
447 | case FAN53555_VSEL_ID_1: |
448 | di->sleep_reg = FAN53555_VSEL1; |
449 | di->vol_reg = FAN53555_VSEL0; |
450 | break; |
451 | default: |
452 | dev_err(di->dev, "Invalid VSEL ID!\n" ); |
453 | return -EINVAL; |
454 | } |
455 | di->sleep_en_reg = di->sleep_reg; |
456 | di->en_reg = di->vol_reg; |
457 | break; |
458 | case RK8602_VENDOR_ROCKCHIP: |
459 | switch (pdata->sleep_vsel_id) { |
460 | case FAN53555_VSEL_ID_0: |
461 | di->sleep_reg = RK8602_VSEL0; |
462 | di->vol_reg = RK8602_VSEL1; |
463 | di->sleep_en_reg = FAN53555_VSEL0; |
464 | di->en_reg = FAN53555_VSEL1; |
465 | break; |
466 | case FAN53555_VSEL_ID_1: |
467 | di->sleep_reg = RK8602_VSEL1; |
468 | di->vol_reg = RK8602_VSEL0; |
469 | di->sleep_en_reg = FAN53555_VSEL1; |
470 | di->en_reg = FAN53555_VSEL0; |
471 | break; |
472 | default: |
473 | dev_err(di->dev, "Invalid VSEL ID!\n" ); |
474 | return -EINVAL; |
475 | } |
476 | break; |
477 | case FAN53526_VENDOR_TCS: |
478 | switch (pdata->sleep_vsel_id) { |
479 | case FAN53555_VSEL_ID_0: |
480 | di->sleep_reg = TCS4525_VSEL0; |
481 | di->vol_reg = TCS4525_VSEL1; |
482 | break; |
483 | case FAN53555_VSEL_ID_1: |
484 | di->sleep_reg = TCS4525_VSEL1; |
485 | di->vol_reg = TCS4525_VSEL0; |
486 | break; |
487 | default: |
488 | dev_err(di->dev, "Invalid VSEL ID!\n" ); |
489 | return -EINVAL; |
490 | } |
491 | di->sleep_en_reg = di->sleep_reg; |
492 | di->en_reg = di->vol_reg; |
493 | break; |
494 | default: |
495 | dev_err(di->dev, "vendor %d not supported!\n" , di->vendor); |
496 | return -EINVAL; |
497 | } |
498 | |
499 | /* Setup mode control register */ |
500 | switch (di->vendor) { |
501 | case FAN53526_VENDOR_FAIRCHILD: |
502 | di->mode_reg = FAN53555_CONTROL; |
503 | |
504 | switch (pdata->sleep_vsel_id) { |
505 | case FAN53555_VSEL_ID_0: |
506 | di->mode_mask = CTL_MODE_VSEL1_MODE; |
507 | break; |
508 | case FAN53555_VSEL_ID_1: |
509 | di->mode_mask = CTL_MODE_VSEL0_MODE; |
510 | break; |
511 | } |
512 | break; |
513 | case FAN53555_VENDOR_FAIRCHILD: |
514 | case FAN53555_VENDOR_ROCKCHIP: |
515 | case FAN53555_VENDOR_SILERGY: |
516 | di->mode_reg = di->vol_reg; |
517 | di->mode_mask = VSEL_MODE; |
518 | break; |
519 | case RK8602_VENDOR_ROCKCHIP: |
520 | di->mode_mask = VSEL_MODE; |
521 | |
522 | switch (pdata->sleep_vsel_id) { |
523 | case FAN53555_VSEL_ID_0: |
524 | di->mode_reg = FAN53555_VSEL1; |
525 | break; |
526 | case FAN53555_VSEL_ID_1: |
527 | di->mode_reg = FAN53555_VSEL0; |
528 | break; |
529 | } |
530 | break; |
531 | case FAN53526_VENDOR_TCS: |
532 | di->mode_reg = TCS4525_COMMAND; |
533 | |
534 | switch (pdata->sleep_vsel_id) { |
535 | case FAN53555_VSEL_ID_0: |
536 | di->mode_mask = TCS_VSEL1_MODE; |
537 | break; |
538 | case FAN53555_VSEL_ID_1: |
539 | di->mode_mask = TCS_VSEL0_MODE; |
540 | break; |
541 | } |
542 | break; |
543 | default: |
544 | dev_err(di->dev, "vendor %d not supported!\n" , di->vendor); |
545 | return -EINVAL; |
546 | } |
547 | |
548 | /* Setup voltage range */ |
549 | switch (di->vendor) { |
550 | case FAN53526_VENDOR_FAIRCHILD: |
551 | ret = fan53526_voltages_setup_fairchild(di); |
552 | break; |
553 | case FAN53555_VENDOR_FAIRCHILD: |
554 | ret = fan53555_voltages_setup_fairchild(di); |
555 | break; |
556 | case FAN53555_VENDOR_ROCKCHIP: |
557 | ret = fan53555_voltages_setup_rockchip(di); |
558 | break; |
559 | case RK8602_VENDOR_ROCKCHIP: |
560 | ret = rk8602_voltages_setup_rockchip(di); |
561 | break; |
562 | case FAN53555_VENDOR_SILERGY: |
563 | ret = fan53555_voltages_setup_silergy(di); |
564 | break; |
565 | case FAN53526_VENDOR_TCS: |
566 | ret = fan53526_voltages_setup_tcs(di); |
567 | break; |
568 | default: |
569 | dev_err(di->dev, "vendor %d not supported!\n" , di->vendor); |
570 | return -EINVAL; |
571 | } |
572 | |
573 | return ret; |
574 | } |
575 | |
576 | static int fan53555_regulator_register(struct fan53555_device_info *di, |
577 | struct regulator_config *config) |
578 | { |
579 | struct regulator_desc *rdesc = &di->desc; |
580 | struct regulator_dev *rdev; |
581 | |
582 | rdesc->name = "fan53555-reg" ; |
583 | rdesc->supply_name = "vin" ; |
584 | rdesc->ops = &fan53555_regulator_ops; |
585 | rdesc->type = REGULATOR_VOLTAGE; |
586 | rdesc->n_voltages = di->vsel_count; |
587 | rdesc->enable_reg = di->en_reg; |
588 | rdesc->enable_mask = VSEL_BUCK_EN; |
589 | rdesc->min_uV = di->vsel_min; |
590 | rdesc->uV_step = di->vsel_step; |
591 | rdesc->vsel_reg = di->vol_reg; |
592 | rdesc->vsel_mask = BIT(fls(di->vsel_count - 1)) - 1; |
593 | rdesc->ramp_reg = di->slew_reg; |
594 | rdesc->ramp_mask = di->slew_mask; |
595 | rdesc->ramp_delay_table = di->ramp_delay_table; |
596 | rdesc->n_ramp_values = di->n_ramp_values; |
597 | rdesc->owner = THIS_MODULE; |
598 | |
599 | rdev = devm_regulator_register(dev: di->dev, regulator_desc: &di->desc, config); |
600 | return PTR_ERR_OR_ZERO(ptr: rdev); |
601 | } |
602 | |
603 | static const struct regmap_config fan53555_regmap_config = { |
604 | .reg_bits = 8, |
605 | .val_bits = 8, |
606 | }; |
607 | |
608 | static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev, |
609 | struct device_node *np, |
610 | const struct regulator_desc *desc) |
611 | { |
612 | struct fan53555_platform_data *pdata; |
613 | int ret; |
614 | u32 tmp; |
615 | |
616 | pdata = devm_kzalloc(dev, size: sizeof(*pdata), GFP_KERNEL); |
617 | if (!pdata) |
618 | return NULL; |
619 | |
620 | pdata->regulator = of_get_regulator_init_data(dev, node: np, desc); |
621 | |
622 | ret = of_property_read_u32(np, propname: "fcs,suspend-voltage-selector" , |
623 | out_value: &tmp); |
624 | if (!ret) |
625 | pdata->sleep_vsel_id = tmp; |
626 | |
627 | return pdata; |
628 | } |
629 | |
630 | static const struct of_device_id __maybe_unused fan53555_dt_ids[] = { |
631 | { |
632 | .compatible = "fcs,fan53526" , |
633 | .data = (void *)FAN53526_VENDOR_FAIRCHILD, |
634 | }, { |
635 | .compatible = "fcs,fan53555" , |
636 | .data = (void *)FAN53555_VENDOR_FAIRCHILD |
637 | }, { |
638 | .compatible = "rockchip,rk8600" , |
639 | .data = (void *)FAN53555_VENDOR_ROCKCHIP |
640 | }, { |
641 | .compatible = "rockchip,rk8602" , |
642 | .data = (void *)RK8602_VENDOR_ROCKCHIP |
643 | }, { |
644 | .compatible = "silergy,syr827" , |
645 | .data = (void *)FAN53555_VENDOR_SILERGY, |
646 | }, { |
647 | .compatible = "silergy,syr828" , |
648 | .data = (void *)FAN53555_VENDOR_SILERGY, |
649 | }, { |
650 | .compatible = "tcs,tcs4525" , |
651 | .data = (void *)FAN53526_VENDOR_TCS |
652 | }, { |
653 | .compatible = "tcs,tcs4526" , |
654 | .data = (void *)FAN53526_VENDOR_TCS |
655 | }, |
656 | { } |
657 | }; |
658 | MODULE_DEVICE_TABLE(of, fan53555_dt_ids); |
659 | |
660 | static int fan53555_regulator_probe(struct i2c_client *client) |
661 | { |
662 | struct device_node *np = client->dev.of_node; |
663 | struct fan53555_device_info *di; |
664 | struct fan53555_platform_data *pdata; |
665 | struct regulator_config config = { }; |
666 | struct regmap *regmap; |
667 | unsigned int val; |
668 | int ret; |
669 | |
670 | di = devm_kzalloc(dev: &client->dev, size: sizeof(struct fan53555_device_info), |
671 | GFP_KERNEL); |
672 | if (!di) |
673 | return -ENOMEM; |
674 | |
675 | pdata = dev_get_platdata(dev: &client->dev); |
676 | if (!pdata) |
677 | pdata = fan53555_parse_dt(dev: &client->dev, np, desc: &di->desc); |
678 | |
679 | if (!pdata || !pdata->regulator) |
680 | return dev_err_probe(dev: &client->dev, err: -ENODEV, |
681 | fmt: "Platform data not found!\n" ); |
682 | |
683 | di->regulator = pdata->regulator; |
684 | di->vendor = (uintptr_t)i2c_get_match_data(client); |
685 | if (!dev_fwnode(&client->dev)) { |
686 | /* if no ramp constraint set, get the pdata ramp_delay */ |
687 | if (!di->regulator->constraints.ramp_delay) { |
688 | if (pdata->slew_rate >= ARRAY_SIZE(slew_rates)) |
689 | return dev_err_probe(dev: &client->dev, err: -EINVAL, |
690 | fmt: "Invalid slew_rate\n" ); |
691 | |
692 | di->regulator->constraints.ramp_delay |
693 | = slew_rates[pdata->slew_rate]; |
694 | } |
695 | } |
696 | |
697 | regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config); |
698 | if (IS_ERR(ptr: regmap)) |
699 | return dev_err_probe(dev: &client->dev, err: PTR_ERR(ptr: regmap), |
700 | fmt: "Failed to allocate regmap!\n" ); |
701 | |
702 | di->dev = &client->dev; |
703 | i2c_set_clientdata(client, data: di); |
704 | /* Get chip ID */ |
705 | ret = regmap_read(map: regmap, FAN53555_ID1, val: &val); |
706 | if (ret < 0) |
707 | return dev_err_probe(dev: &client->dev, err: ret, fmt: "Failed to get chip ID!\n" ); |
708 | |
709 | di->chip_id = val & DIE_ID; |
710 | /* Get chip revision */ |
711 | ret = regmap_read(map: regmap, FAN53555_ID2, val: &val); |
712 | if (ret < 0) |
713 | return dev_err_probe(dev: &client->dev, err: ret, fmt: "Failed to get chip Rev!\n" ); |
714 | |
715 | di->chip_rev = val & DIE_REV; |
716 | dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n" , |
717 | di->chip_id, di->chip_rev); |
718 | /* Device init */ |
719 | ret = fan53555_device_setup(di, pdata); |
720 | if (ret < 0) |
721 | return dev_err_probe(dev: &client->dev, err: ret, fmt: "Failed to setup device!\n" ); |
722 | |
723 | /* Register regulator */ |
724 | config.dev = di->dev; |
725 | config.init_data = di->regulator; |
726 | config.regmap = regmap; |
727 | config.driver_data = di; |
728 | config.of_node = np; |
729 | |
730 | ret = fan53555_regulator_register(di, config: &config); |
731 | if (ret < 0) |
732 | dev_err_probe(dev: &client->dev, err: ret, fmt: "Failed to register regulator!\n" ); |
733 | |
734 | return ret; |
735 | } |
736 | |
737 | static const struct i2c_device_id fan53555_id[] = { |
738 | { |
739 | .name = "fan53526" , |
740 | .driver_data = FAN53526_VENDOR_FAIRCHILD |
741 | }, { |
742 | .name = "fan53555" , |
743 | .driver_data = FAN53555_VENDOR_FAIRCHILD |
744 | }, { |
745 | .name = "rk8600" , |
746 | .driver_data = FAN53555_VENDOR_ROCKCHIP |
747 | }, { |
748 | .name = "rk8602" , |
749 | .driver_data = RK8602_VENDOR_ROCKCHIP |
750 | }, { |
751 | .name = "syr827" , |
752 | .driver_data = FAN53555_VENDOR_SILERGY |
753 | }, { |
754 | .name = "syr828" , |
755 | .driver_data = FAN53555_VENDOR_SILERGY |
756 | }, { |
757 | .name = "tcs4525" , |
758 | .driver_data = FAN53526_VENDOR_TCS |
759 | }, { |
760 | .name = "tcs4526" , |
761 | .driver_data = FAN53526_VENDOR_TCS |
762 | }, |
763 | { }, |
764 | }; |
765 | MODULE_DEVICE_TABLE(i2c, fan53555_id); |
766 | |
767 | static struct i2c_driver fan53555_regulator_driver = { |
768 | .driver = { |
769 | .name = "fan53555-regulator" , |
770 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
771 | .of_match_table = of_match_ptr(fan53555_dt_ids), |
772 | }, |
773 | .probe = fan53555_regulator_probe, |
774 | .id_table = fan53555_id, |
775 | }; |
776 | |
777 | module_i2c_driver(fan53555_regulator_driver); |
778 | |
779 | MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>" ); |
780 | MODULE_DESCRIPTION("FAN53555 regulator driver" ); |
781 | MODULE_LICENSE("GPL v2" ); |
782 | |