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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/module.h>
12#include <linux/param.h>
13#include <linux/err.h>
14#include <linux/platform_device.h>
15#include <linux/regulator/driver.h>
16#include <linux/regulator/machine.h>
17#include <linux/regulator/of_regulator.h>
18#include <linux/of_device.h>
19#include <linux/i2c.h>
20#include <linux/slab.h>
21#include <linux/regmap.h>
22#include <linux/regulator/fan53555.h>
23
24/* Voltage setting */
25#define FAN53555_VSEL0 0x00
26#define FAN53555_VSEL1 0x01
27/* Control register */
28#define FAN53555_CONTROL 0x02
29/* IC Type */
30#define FAN53555_ID1 0x03
31/* IC mask version */
32#define FAN53555_ID2 0x04
33/* Monitor register */
34#define FAN53555_MONITOR 0x05
35
36/* VSEL bit definitions */
37#define VSEL_BUCK_EN (1 << 7)
38#define VSEL_MODE (1 << 6)
39/* Chip ID and Verison */
40#define DIE_ID 0x0F /* ID1 */
41#define DIE_REV 0x0F /* ID2 */
42/* Control bit definitions */
43#define CTL_OUTPUT_DISCHG (1 << 7)
44#define CTL_SLEW_MASK (0x7 << 4)
45#define CTL_SLEW_SHIFT 4
46#define CTL_RESET (1 << 2)
47#define CTL_MODE_VSEL0_MODE BIT(0)
48#define CTL_MODE_VSEL1_MODE BIT(1)
49
50#define FAN53555_NVOLTAGES 64 /* Numbers of voltages */
51#define FAN53526_NVOLTAGES 128
52
53enum fan53555_vendor {
54 FAN53526_VENDOR_FAIRCHILD = 0,
55 FAN53555_VENDOR_FAIRCHILD,
56 FAN53555_VENDOR_SILERGY,
57};
58
59enum {
60 FAN53526_CHIP_ID_01 = 1,
61};
62
63enum {
64 FAN53526_CHIP_REV_08 = 8,
65};
66
67/* IC Type */
68enum {
69 FAN53555_CHIP_ID_00 = 0,
70 FAN53555_CHIP_ID_01,
71 FAN53555_CHIP_ID_02,
72 FAN53555_CHIP_ID_03,
73 FAN53555_CHIP_ID_04,
74 FAN53555_CHIP_ID_05,
75 FAN53555_CHIP_ID_08 = 8,
76};
77
78/* IC mask revision */
79enum {
80 FAN53555_CHIP_REV_00 = 0x3,
81 FAN53555_CHIP_REV_13 = 0xf,
82};
83
84enum {
85 SILERGY_SYR82X = 8,
86 SILERGY_SYR83X = 9,
87};
88
89struct fan53555_device_info {
90 enum fan53555_vendor vendor;
91 struct device *dev;
92 struct regulator_desc desc;
93 struct regulator_init_data *regulator;
94 /* IC Type and Rev */
95 int chip_id;
96 int chip_rev;
97 /* Voltage setting register */
98 unsigned int vol_reg;
99 unsigned int sleep_reg;
100 /* Voltage range and step(linear) */
101 unsigned int vsel_min;
102 unsigned int vsel_step;
103 unsigned int vsel_count;
104 /* Mode */
105 unsigned int mode_reg;
106 unsigned int mode_mask;
107 /* Sleep voltage cache */
108 unsigned int sleep_vol_cache;
109};
110
111static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
112{
113 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
114 int ret;
115
116 if (di->sleep_vol_cache == uV)
117 return 0;
118 ret = regulator_map_voltage_linear(rdev, uV, uV);
119 if (ret < 0)
120 return ret;
121 ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
122 di->desc.vsel_mask, ret);
123 if (ret < 0)
124 return ret;
125 /* Cache the sleep voltage setting.
126 * Might not be the real voltage which is rounded */
127 di->sleep_vol_cache = uV;
128
129 return 0;
130}
131
132static int fan53555_set_suspend_enable(struct regulator_dev *rdev)
133{
134 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
135
136 return regmap_update_bits(rdev->regmap, di->sleep_reg,
137 VSEL_BUCK_EN, VSEL_BUCK_EN);
138}
139
140static int fan53555_set_suspend_disable(struct regulator_dev *rdev)
141{
142 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
143
144 return regmap_update_bits(rdev->regmap, di->sleep_reg,
145 VSEL_BUCK_EN, 0);
146}
147
148static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
149{
150 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
151
152 switch (mode) {
153 case REGULATOR_MODE_FAST:
154 regmap_update_bits(rdev->regmap, di->mode_reg,
155 di->mode_mask, di->mode_mask);
156 break;
157 case REGULATOR_MODE_NORMAL:
158 regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
159 break;
160 default:
161 return -EINVAL;
162 }
163 return 0;
164}
165
166static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
167{
168 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
169 unsigned int val;
170 int ret = 0;
171
172 ret = regmap_read(rdev->regmap, di->mode_reg, &val);
173 if (ret < 0)
174 return ret;
175 if (val & di->mode_mask)
176 return REGULATOR_MODE_FAST;
177 else
178 return REGULATOR_MODE_NORMAL;
179}
180
181static const int slew_rates[] = {
182 64000,
183 32000,
184 16000,
185 8000,
186 4000,
187 2000,
188 1000,
189 500,
190};
191
192static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
193{
194 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
195 int regval = -1, i;
196
197 for (i = 0; i < ARRAY_SIZE(slew_rates); i++) {
198 if (ramp <= slew_rates[i])
199 regval = i;
200 else
201 break;
202 }
203
204 if (regval < 0) {
205 dev_err(di->dev, "unsupported ramp value %d\n", ramp);
206 return -EINVAL;
207 }
208
209 return regmap_update_bits(rdev->regmap, FAN53555_CONTROL,
210 CTL_SLEW_MASK, regval << CTL_SLEW_SHIFT);
211}
212
213static const struct regulator_ops fan53555_regulator_ops = {
214 .set_voltage_sel = regulator_set_voltage_sel_regmap,
215 .get_voltage_sel = regulator_get_voltage_sel_regmap,
216 .set_voltage_time_sel = regulator_set_voltage_time_sel,
217 .map_voltage = regulator_map_voltage_linear,
218 .list_voltage = regulator_list_voltage_linear,
219 .set_suspend_voltage = fan53555_set_suspend_voltage,
220 .enable = regulator_enable_regmap,
221 .disable = regulator_disable_regmap,
222 .is_enabled = regulator_is_enabled_regmap,
223 .set_mode = fan53555_set_mode,
224 .get_mode = fan53555_get_mode,
225 .set_ramp_delay = fan53555_set_ramp,
226 .set_suspend_enable = fan53555_set_suspend_enable,
227 .set_suspend_disable = fan53555_set_suspend_disable,
228};
229
230static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di)
231{
232 /* Init voltage range and step */
233 switch (di->chip_id) {
234 case FAN53526_CHIP_ID_01:
235 switch (di->chip_rev) {
236 case FAN53526_CHIP_REV_08:
237 di->vsel_min = 600000;
238 di->vsel_step = 6250;
239 break;
240 default:
241 dev_err(di->dev,
242 "Chip ID %d with rev %d not supported!\n",
243 di->chip_id, di->chip_rev);
244 return -EINVAL;
245 }
246 break;
247 default:
248 dev_err(di->dev,
249 "Chip ID %d not supported!\n", di->chip_id);
250 return -EINVAL;
251 }
252
253 di->vsel_count = FAN53526_NVOLTAGES;
254
255 return 0;
256}
257
258static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
259{
260 /* Init voltage range and step */
261 switch (di->chip_id) {
262 case FAN53555_CHIP_ID_00:
263 switch (di->chip_rev) {
264 case FAN53555_CHIP_REV_00:
265 di->vsel_min = 600000;
266 di->vsel_step = 10000;
267 break;
268 case FAN53555_CHIP_REV_13:
269 di->vsel_min = 800000;
270 di->vsel_step = 10000;
271 break;
272 default:
273 dev_err(di->dev,
274 "Chip ID %d with rev %d not supported!\n",
275 di->chip_id, di->chip_rev);
276 return -EINVAL;
277 }
278 break;
279 case FAN53555_CHIP_ID_01:
280 case FAN53555_CHIP_ID_03:
281 case FAN53555_CHIP_ID_05:
282 case FAN53555_CHIP_ID_08:
283 di->vsel_min = 600000;
284 di->vsel_step = 10000;
285 break;
286 case FAN53555_CHIP_ID_04:
287 di->vsel_min = 603000;
288 di->vsel_step = 12826;
289 break;
290 default:
291 dev_err(di->dev,
292 "Chip ID %d not supported!\n", di->chip_id);
293 return -EINVAL;
294 }
295
296 di->vsel_count = FAN53555_NVOLTAGES;
297
298 return 0;
299}
300
301static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
302{
303 /* Init voltage range and step */
304 switch (di->chip_id) {
305 case SILERGY_SYR82X:
306 case SILERGY_SYR83X:
307 di->vsel_min = 712500;
308 di->vsel_step = 12500;
309 break;
310 default:
311 dev_err(di->dev,
312 "Chip ID %d not supported!\n", di->chip_id);
313 return -EINVAL;
314 }
315
316 di->vsel_count = FAN53555_NVOLTAGES;
317
318 return 0;
319}
320
321/* For 00,01,03,05 options:
322 * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
323 * For 04 option:
324 * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
325 * */
326static int fan53555_device_setup(struct fan53555_device_info *di,
327 struct fan53555_platform_data *pdata)
328{
329 int ret = 0;
330
331 /* Setup voltage control register */
332 switch (pdata->sleep_vsel_id) {
333 case FAN53555_VSEL_ID_0:
334 di->sleep_reg = FAN53555_VSEL0;
335 di->vol_reg = FAN53555_VSEL1;
336 break;
337 case FAN53555_VSEL_ID_1:
338 di->sleep_reg = FAN53555_VSEL1;
339 di->vol_reg = FAN53555_VSEL0;
340 break;
341 default:
342 dev_err(di->dev, "Invalid VSEL ID!\n");
343 return -EINVAL;
344 }
345
346 /* Setup mode control register */
347 switch (di->vendor) {
348 case FAN53526_VENDOR_FAIRCHILD:
349 di->mode_reg = FAN53555_CONTROL;
350
351 switch (pdata->sleep_vsel_id) {
352 case FAN53555_VSEL_ID_0:
353 di->mode_mask = CTL_MODE_VSEL1_MODE;
354 break;
355 case FAN53555_VSEL_ID_1:
356 di->mode_mask = CTL_MODE_VSEL0_MODE;
357 break;
358 }
359 break;
360 case FAN53555_VENDOR_FAIRCHILD:
361 case FAN53555_VENDOR_SILERGY:
362 di->mode_reg = di->vol_reg;
363 di->mode_mask = VSEL_MODE;
364 break;
365 default:
366 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
367 return -EINVAL;
368 }
369
370 /* Setup voltage range */
371 switch (di->vendor) {
372 case FAN53526_VENDOR_FAIRCHILD:
373 ret = fan53526_voltages_setup_fairchild(di);
374 break;
375 case FAN53555_VENDOR_FAIRCHILD:
376 ret = fan53555_voltages_setup_fairchild(di);
377 break;
378 case FAN53555_VENDOR_SILERGY:
379 ret = fan53555_voltages_setup_silergy(di);
380 break;
381 default:
382 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
383 return -EINVAL;
384 }
385
386 return ret;
387}
388
389static int fan53555_regulator_register(struct fan53555_device_info *di,
390 struct regulator_config *config)
391{
392 struct regulator_desc *rdesc = &di->desc;
393 struct regulator_dev *rdev;
394
395 rdesc->name = "fan53555-reg";
396 rdesc->supply_name = "vin";
397 rdesc->ops = &fan53555_regulator_ops;
398 rdesc->type = REGULATOR_VOLTAGE;
399 rdesc->n_voltages = di->vsel_count;
400 rdesc->enable_reg = di->vol_reg;
401 rdesc->enable_mask = VSEL_BUCK_EN;
402 rdesc->min_uV = di->vsel_min;
403 rdesc->uV_step = di->vsel_step;
404 rdesc->vsel_reg = di->vol_reg;
405 rdesc->vsel_mask = di->vsel_count - 1;
406 rdesc->owner = THIS_MODULE;
407
408 rdev = devm_regulator_register(di->dev, &di->desc, config);
409 return PTR_ERR_OR_ZERO(rdev);
410}
411
412static const struct regmap_config fan53555_regmap_config = {
413 .reg_bits = 8,
414 .val_bits = 8,
415};
416
417static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
418 struct device_node *np,
419 const struct regulator_desc *desc)
420{
421 struct fan53555_platform_data *pdata;
422 int ret;
423 u32 tmp;
424
425 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
426 if (!pdata)
427 return NULL;
428
429 pdata->regulator = of_get_regulator_init_data(dev, np, desc);
430
431 ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
432 &tmp);
433 if (!ret)
434 pdata->sleep_vsel_id = tmp;
435
436 return pdata;
437}
438
439static const struct of_device_id fan53555_dt_ids[] = {
440 {
441 .compatible = "fcs,fan53526",
442 .data = (void *)FAN53526_VENDOR_FAIRCHILD,
443 }, {
444 .compatible = "fcs,fan53555",
445 .data = (void *)FAN53555_VENDOR_FAIRCHILD
446 }, {
447 .compatible = "silergy,syr827",
448 .data = (void *)FAN53555_VENDOR_SILERGY,
449 }, {
450 .compatible = "silergy,syr828",
451 .data = (void *)FAN53555_VENDOR_SILERGY,
452 },
453 { }
454};
455MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
456
457static int fan53555_regulator_probe(struct i2c_client *client,
458 const struct i2c_device_id *id)
459{
460 struct device_node *np = client->dev.of_node;
461 struct fan53555_device_info *di;
462 struct fan53555_platform_data *pdata;
463 struct regulator_config config = { };
464 struct regmap *regmap;
465 unsigned int val;
466 int ret;
467
468 di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
469 GFP_KERNEL);
470 if (!di)
471 return -ENOMEM;
472
473 pdata = dev_get_platdata(&client->dev);
474 if (!pdata)
475 pdata = fan53555_parse_dt(&client->dev, np, &di->desc);
476
477 if (!pdata || !pdata->regulator) {
478 dev_err(&client->dev, "Platform data not found!\n");
479 return -ENODEV;
480 }
481
482 di->regulator = pdata->regulator;
483 if (client->dev.of_node) {
484 di->vendor =
485 (unsigned long)of_device_get_match_data(&client->dev);
486 } else {
487 /* if no ramp constraint set, get the pdata ramp_delay */
488 if (!di->regulator->constraints.ramp_delay) {
489 if (pdata->slew_rate >= ARRAY_SIZE(slew_rates)) {
490 dev_err(&client->dev, "Invalid slew_rate\n");
491 return -EINVAL;
492 }
493
494 di->regulator->constraints.ramp_delay
495 = slew_rates[pdata->slew_rate];
496 }
497
498 di->vendor = id->driver_data;
499 }
500
501 regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
502 if (IS_ERR(regmap)) {
503 dev_err(&client->dev, "Failed to allocate regmap!\n");
504 return PTR_ERR(regmap);
505 }
506 di->dev = &client->dev;
507 i2c_set_clientdata(client, di);
508 /* Get chip ID */
509 ret = regmap_read(regmap, FAN53555_ID1, &val);
510 if (ret < 0) {
511 dev_err(&client->dev, "Failed to get chip ID!\n");
512 return ret;
513 }
514 di->chip_id = val & DIE_ID;
515 /* Get chip revision */
516 ret = regmap_read(regmap, FAN53555_ID2, &val);
517 if (ret < 0) {
518 dev_err(&client->dev, "Failed to get chip Rev!\n");
519 return ret;
520 }
521 di->chip_rev = val & DIE_REV;
522 dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
523 di->chip_id, di->chip_rev);
524 /* Device init */
525 ret = fan53555_device_setup(di, pdata);
526 if (ret < 0) {
527 dev_err(&client->dev, "Failed to setup device!\n");
528 return ret;
529 }
530 /* Register regulator */
531 config.dev = di->dev;
532 config.init_data = di->regulator;
533 config.regmap = regmap;
534 config.driver_data = di;
535 config.of_node = np;
536
537 ret = fan53555_regulator_register(di, &config);
538 if (ret < 0)
539 dev_err(&client->dev, "Failed to register regulator!\n");
540 return ret;
541
542}
543
544static const struct i2c_device_id fan53555_id[] = {
545 {
546 .name = "fan53526",
547 .driver_data = FAN53526_VENDOR_FAIRCHILD
548 }, {
549 .name = "fan53555",
550 .driver_data = FAN53555_VENDOR_FAIRCHILD
551 }, {
552 .name = "syr827",
553 .driver_data = FAN53555_VENDOR_SILERGY
554 }, {
555 .name = "syr828",
556 .driver_data = FAN53555_VENDOR_SILERGY
557 },
558 { },
559};
560MODULE_DEVICE_TABLE(i2c, fan53555_id);
561
562static struct i2c_driver fan53555_regulator_driver = {
563 .driver = {
564 .name = "fan53555-regulator",
565 .of_match_table = of_match_ptr(fan53555_dt_ids),
566 },
567 .probe = fan53555_regulator_probe,
568 .id_table = fan53555_id,
569};
570
571module_i2c_driver(fan53555_regulator_driver);
572
573MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
574MODULE_DESCRIPTION("FAN53555 regulator driver");
575MODULE_LICENSE("GPL v2");
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
68enum 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
77enum {
78 FAN53526_CHIP_ID_01 = 1,
79};
80
81enum {
82 FAN53526_CHIP_REV_08 = 8,
83};
84
85/* IC Type */
86enum {
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
96enum {
97 RK8600_CHIP_ID_08 = 8, /* RK8600, RK8601 */
98};
99
100enum {
101 RK8602_CHIP_ID_10 = 10, /* RK8602, RK8603 */
102};
103
104enum {
105 TCS4525_CHIP_ID_12 = 12,
106};
107
108enum {
109 TCS4526_CHIP_ID_00 = 0,
110};
111
112/* IC mask revision */
113enum {
114 FAN53555_CHIP_REV_00 = 0x3,
115 FAN53555_CHIP_REV_13 = 0xf,
116};
117
118enum {
119 SILERGY_SYR82X = 8,
120 SILERGY_SYR83X = 9,
121};
122
123struct 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
153static 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, uV, uV);
161 if (ret < 0)
162 return ret;
163 ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
164 di->desc.vsel_mask, 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
174static 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(rdev->regmap, di->sleep_en_reg,
179 VSEL_BUCK_EN, VSEL_BUCK_EN);
180}
181
182static 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(rdev->regmap, di->sleep_en_reg,
187 VSEL_BUCK_EN, 0);
188}
189
190static 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(rdev->regmap, di->mode_reg,
197 di->mode_mask, di->mode_mask);
198 break;
199 case REGULATOR_MODE_NORMAL:
200 regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
201 break;
202 default:
203 return -EINVAL;
204 }
205 return 0;
206}
207
208static 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(rdev->regmap, di->mode_reg, &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
223static const unsigned int slew_rates[] = {
224 64000,
225 32000,
226 16000,
227 8000,
228 4000,
229 2000,
230 1000,
231 500,
232};
233
234static const unsigned int tcs_slew_rates[] = {
235 18700,
236 9300,
237 4600,
238 2300,
239};
240
241static 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
258static 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
290static 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
336static 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
358static 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
380static 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
403static 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 * */
431static 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
576static 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(di->dev, &di->desc, config);
600 return PTR_ERR_OR_ZERO(rdev);
601}
602
603static const struct regmap_config fan53555_regmap_config = {
604 .reg_bits = 8,
605 .val_bits = 8,
606};
607
608static 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, sizeof(*pdata), GFP_KERNEL);
617 if (!pdata)
618 return NULL;
619
620 pdata->regulator = of_get_regulator_init_data(dev, np, desc);
621
622 ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
623 &tmp);
624 if (!ret)
625 pdata->sleep_vsel_id = tmp;
626
627 return pdata;
628}
629
630static 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};
658MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
659
660static 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(&client->dev, sizeof(struct fan53555_device_info),
671 GFP_KERNEL);
672 if (!di)
673 return -ENOMEM;
674
675 pdata = dev_get_platdata(&client->dev);
676 if (!pdata)
677 pdata = fan53555_parse_dt(&client->dev, np, &di->desc);
678
679 if (!pdata || !pdata->regulator)
680 return dev_err_probe(&client->dev, -ENODEV,
681 "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(&client->dev, -EINVAL,
690 "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(regmap))
699 return dev_err_probe(&client->dev, PTR_ERR(regmap),
700 "Failed to allocate regmap!\n");
701
702 di->dev = &client->dev;
703 i2c_set_clientdata(client, di);
704 /* Get chip ID */
705 ret = regmap_read(regmap, FAN53555_ID1, &val);
706 if (ret < 0)
707 return dev_err_probe(&client->dev, ret, "Failed to get chip ID!\n");
708
709 di->chip_id = val & DIE_ID;
710 /* Get chip revision */
711 ret = regmap_read(regmap, FAN53555_ID2, &val);
712 if (ret < 0)
713 return dev_err_probe(&client->dev, ret, "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(&client->dev, ret, "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);
731 if (ret < 0)
732 dev_err_probe(&client->dev, ret, "Failed to register regulator!\n");
733
734 return ret;
735}
736
737static 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};
765MODULE_DEVICE_TABLE(i2c, fan53555_id);
766
767static 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
777module_i2c_driver(fan53555_regulator_driver);
778
779MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
780MODULE_DESCRIPTION("FAN53555 regulator driver");
781MODULE_LICENSE("GPL v2");