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23#include <linux/delay.h>
24#include <linux/gpio.h>
25#include <linux/i2c.h>
26#include <linux/module.h>
27#include <linux/of_device.h>
28#include <linux/of_gpio.h>
29#include <linux/mfd/rk808.h>
30#include <linux/regulator/driver.h>
31#include <linux/regulator/of_regulator.h>
32#include <linux/gpio/consumer.h>
33
34
35#define RK808_BUCK_VSEL_MASK 0x3f
36#define RK808_BUCK4_VSEL_MASK 0xf
37#define RK808_LDO_VSEL_MASK 0x1f
38
39#define RK818_BUCK_VSEL_MASK 0x3f
40#define RK818_BUCK4_VSEL_MASK 0x1f
41#define RK818_LDO_VSEL_MASK 0x1f
42#define RK818_LDO3_ON_VSEL_MASK 0xf
43#define RK818_BOOST_ON_VSEL_MASK 0xe0
44
45
46#define RK808_RAMP_RATE_OFFSET 3
47#define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET)
48#define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET)
49#define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET)
50#define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET)
51#define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET)
52
53#define RK808_DVS2_POL BIT(2)
54#define RK808_DVS1_POL BIT(1)
55
56
57#define RK808_SLP_REG_OFFSET 1
58
59
60#define RK808_DVS_REG_OFFSET 2
61
62
63#define RK808_SLP_SET_OFF_REG_OFFSET 2
64
65
66#define MAX_STEPS_ONE_TIME 8
67
68#define RK8XX_DESC(_id, _match, _supply, _min, _max, _step, _vreg, \
69 _vmask, _ereg, _emask, _etime) \
70 [_id] = { \
71 .name = (_match), \
72 .supply_name = (_supply), \
73 .of_match = of_match_ptr(_match), \
74 .regulators_node = of_match_ptr("regulators"), \
75 .type = REGULATOR_VOLTAGE, \
76 .id = (_id), \
77 .n_voltages = (((_max) - (_min)) / (_step) + 1), \
78 .owner = THIS_MODULE, \
79 .min_uV = (_min) * 1000, \
80 .uV_step = (_step) * 1000, \
81 .vsel_reg = (_vreg), \
82 .vsel_mask = (_vmask), \
83 .enable_reg = (_ereg), \
84 .enable_mask = (_emask), \
85 .enable_time = (_etime), \
86 .ops = &rk808_reg_ops, \
87 }
88
89#define RK8XX_DESC_SWITCH(_id, _match, _supply, _ereg, _emask) \
90 [_id] = { \
91 .name = (_match), \
92 .supply_name = (_supply), \
93 .of_match = of_match_ptr(_match), \
94 .regulators_node = of_match_ptr("regulators"), \
95 .type = REGULATOR_VOLTAGE, \
96 .id = (_id), \
97 .enable_reg = (_ereg), \
98 .enable_mask = (_emask), \
99 .owner = THIS_MODULE, \
100 .ops = &rk808_switch_ops \
101 }
102
103
104struct rk808_regulator_data {
105 struct gpio_desc *dvs_gpio[2];
106};
107
108static const int rk808_buck_config_regs[] = {
109 RK808_BUCK1_CONFIG_REG,
110 RK808_BUCK2_CONFIG_REG,
111 RK808_BUCK3_CONFIG_REG,
112 RK808_BUCK4_CONFIG_REG,
113};
114
115static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
116 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
117 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
118};
119
120static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
121{
122 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
123 int id = rdev_get_id(rdev);
124 struct gpio_desc *gpio = pdata->dvs_gpio[id];
125 unsigned int val;
126 int ret;
127
128 if (!gpio || gpiod_get_value(gpio) == 0)
129 return regulator_get_voltage_sel_regmap(rdev);
130
131 ret = regmap_read(rdev->regmap,
132 rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
133 &val);
134 if (ret != 0)
135 return ret;
136
137 val &= rdev->desc->vsel_mask;
138 val >>= ffs(rdev->desc->vsel_mask) - 1;
139
140 return val;
141}
142
143static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
144 unsigned sel)
145{
146 int ret, delta_sel;
147 unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;
148
149 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
150 if (ret != 0)
151 return ret;
152
153 tmp = val & ~mask;
154 old_sel = val & mask;
155 old_sel >>= ffs(mask) - 1;
156 delta_sel = sel - old_sel;
157
158
159
160
161
162
163 while (delta_sel > MAX_STEPS_ONE_TIME) {
164 old_sel += MAX_STEPS_ONE_TIME;
165 val = old_sel << (ffs(mask) - 1);
166 val |= tmp;
167
168
169
170
171
172
173
174 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
175 delta_sel = sel - old_sel;
176 }
177
178 sel <<= ffs(mask) - 1;
179 val = tmp | sel;
180 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
181
182
183
184
185
186
187 udelay(1);
188
189 return ret;
190}
191
192static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
193 unsigned sel)
194{
195 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
196 int id = rdev_get_id(rdev);
197 struct gpio_desc *gpio = pdata->dvs_gpio[id];
198 unsigned int reg = rdev->desc->vsel_reg;
199 unsigned old_sel;
200 int ret, gpio_level;
201
202 if (!gpio)
203 return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);
204
205 gpio_level = gpiod_get_value(gpio);
206 if (gpio_level == 0) {
207 reg += RK808_DVS_REG_OFFSET;
208 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
209 } else {
210 ret = regmap_read(rdev->regmap,
211 reg + RK808_DVS_REG_OFFSET,
212 &old_sel);
213 }
214
215 if (ret != 0)
216 return ret;
217
218 sel <<= ffs(rdev->desc->vsel_mask) - 1;
219 sel |= old_sel & ~rdev->desc->vsel_mask;
220
221 ret = regmap_write(rdev->regmap, reg, sel);
222 if (ret)
223 return ret;
224
225 gpiod_set_value(gpio, !gpio_level);
226
227 return ret;
228}
229
230static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
231 unsigned int old_selector,
232 unsigned int new_selector)
233{
234 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
235 int id = rdev_get_id(rdev);
236 struct gpio_desc *gpio = pdata->dvs_gpio[id];
237
238
239 if (!gpio)
240 return 0;
241
242 return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
243}
244
245static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
246{
247 unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
248 unsigned int reg = rk808_buck_config_regs[rdev_get_id(rdev)];
249
250 switch (ramp_delay) {
251 case 1 ... 2000:
252 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
253 break;
254 case 2001 ... 4000:
255 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
256 break;
257 case 4001 ... 6000:
258 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
259 break;
260 case 6001 ... 10000:
261 break;
262 default:
263 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
264 rdev->desc->name, ramp_delay);
265 }
266
267 return regmap_update_bits(rdev->regmap, reg,
268 RK808_RAMP_RATE_MASK, ramp_value);
269}
270
271static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
272{
273 unsigned int reg;
274 int sel = regulator_map_voltage_linear(rdev, uv, uv);
275
276 if (sel < 0)
277 return -EINVAL;
278
279 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
280
281 return regmap_update_bits(rdev->regmap, reg,
282 rdev->desc->vsel_mask,
283 sel);
284}
285
286static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv)
287{
288 unsigned int reg;
289 int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
290
291 if (sel < 0)
292 return -EINVAL;
293
294 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
295
296 return regmap_update_bits(rdev->regmap, reg,
297 rdev->desc->vsel_mask,
298 sel);
299}
300
301static int rk808_set_suspend_enable(struct regulator_dev *rdev)
302{
303 unsigned int reg;
304
305 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
306
307 return regmap_update_bits(rdev->regmap, reg,
308 rdev->desc->enable_mask,
309 0);
310}
311
312static int rk808_set_suspend_disable(struct regulator_dev *rdev)
313{
314 unsigned int reg;
315
316 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
317
318 return regmap_update_bits(rdev->regmap, reg,
319 rdev->desc->enable_mask,
320 rdev->desc->enable_mask);
321}
322
323static struct regulator_ops rk808_buck1_2_ops = {
324 .list_voltage = regulator_list_voltage_linear,
325 .map_voltage = regulator_map_voltage_linear,
326 .get_voltage_sel = rk808_buck1_2_get_voltage_sel_regmap,
327 .set_voltage_sel = rk808_buck1_2_set_voltage_sel,
328 .set_voltage_time_sel = rk808_buck1_2_set_voltage_time_sel,
329 .enable = regulator_enable_regmap,
330 .disable = regulator_disable_regmap,
331 .is_enabled = regulator_is_enabled_regmap,
332 .set_ramp_delay = rk808_set_ramp_delay,
333 .set_suspend_voltage = rk808_set_suspend_voltage,
334 .set_suspend_enable = rk808_set_suspend_enable,
335 .set_suspend_disable = rk808_set_suspend_disable,
336};
337
338static struct regulator_ops rk808_reg_ops = {
339 .list_voltage = regulator_list_voltage_linear,
340 .map_voltage = regulator_map_voltage_linear,
341 .get_voltage_sel = regulator_get_voltage_sel_regmap,
342 .set_voltage_sel = regulator_set_voltage_sel_regmap,
343 .enable = regulator_enable_regmap,
344 .disable = regulator_disable_regmap,
345 .is_enabled = regulator_is_enabled_regmap,
346 .set_suspend_voltage = rk808_set_suspend_voltage,
347 .set_suspend_enable = rk808_set_suspend_enable,
348 .set_suspend_disable = rk808_set_suspend_disable,
349};
350
351static struct regulator_ops rk808_reg_ops_ranges = {
352 .list_voltage = regulator_list_voltage_linear_range,
353 .map_voltage = regulator_map_voltage_linear_range,
354 .get_voltage_sel = regulator_get_voltage_sel_regmap,
355 .set_voltage_sel = regulator_set_voltage_sel_regmap,
356 .enable = regulator_enable_regmap,
357 .disable = regulator_disable_regmap,
358 .is_enabled = regulator_is_enabled_regmap,
359 .set_suspend_voltage = rk808_set_suspend_voltage_range,
360 .set_suspend_enable = rk808_set_suspend_enable,
361 .set_suspend_disable = rk808_set_suspend_disable,
362};
363
364static struct regulator_ops rk808_switch_ops = {
365 .enable = regulator_enable_regmap,
366 .disable = regulator_disable_regmap,
367 .is_enabled = regulator_is_enabled_regmap,
368 .set_suspend_enable = rk808_set_suspend_enable,
369 .set_suspend_disable = rk808_set_suspend_disable,
370};
371
372static const struct regulator_desc rk808_reg[] = {
373 {
374 .name = "DCDC_REG1",
375 .supply_name = "vcc1",
376 .of_match = of_match_ptr("DCDC_REG1"),
377 .regulators_node = of_match_ptr("regulators"),
378 .id = RK808_ID_DCDC1,
379 .ops = &rk808_buck1_2_ops,
380 .type = REGULATOR_VOLTAGE,
381 .min_uV = 712500,
382 .uV_step = 12500,
383 .n_voltages = 64,
384 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
385 .vsel_mask = RK808_BUCK_VSEL_MASK,
386 .enable_reg = RK808_DCDC_EN_REG,
387 .enable_mask = BIT(0),
388 .owner = THIS_MODULE,
389 }, {
390 .name = "DCDC_REG2",
391 .supply_name = "vcc2",
392 .of_match = of_match_ptr("DCDC_REG2"),
393 .regulators_node = of_match_ptr("regulators"),
394 .id = RK808_ID_DCDC2,
395 .ops = &rk808_buck1_2_ops,
396 .type = REGULATOR_VOLTAGE,
397 .min_uV = 712500,
398 .uV_step = 12500,
399 .n_voltages = 64,
400 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
401 .vsel_mask = RK808_BUCK_VSEL_MASK,
402 .enable_reg = RK808_DCDC_EN_REG,
403 .enable_mask = BIT(1),
404 .owner = THIS_MODULE,
405 }, {
406 .name = "DCDC_REG3",
407 .supply_name = "vcc3",
408 .of_match = of_match_ptr("DCDC_REG3"),
409 .regulators_node = of_match_ptr("regulators"),
410 .id = RK808_ID_DCDC3,
411 .ops = &rk808_switch_ops,
412 .type = REGULATOR_VOLTAGE,
413 .n_voltages = 1,
414 .enable_reg = RK808_DCDC_EN_REG,
415 .enable_mask = BIT(2),
416 .owner = THIS_MODULE,
417 },
418 RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100,
419 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK,
420 RK808_DCDC_EN_REG, BIT(3), 0),
421 RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
422 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
423 BIT(0), 400),
424 RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
425 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
426 BIT(1), 400),
427 {
428 .name = "LDO_REG3",
429 .supply_name = "vcc7",
430 .of_match = of_match_ptr("LDO_REG3"),
431 .regulators_node = of_match_ptr("regulators"),
432 .id = RK808_ID_LDO3,
433 .ops = &rk808_reg_ops_ranges,
434 .type = REGULATOR_VOLTAGE,
435 .n_voltages = 16,
436 .linear_ranges = rk808_ldo3_voltage_ranges,
437 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
438 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
439 .vsel_mask = RK808_BUCK4_VSEL_MASK,
440 .enable_reg = RK808_LDO_EN_REG,
441 .enable_mask = BIT(2),
442 .enable_time = 400,
443 .owner = THIS_MODULE,
444 },
445 RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100,
446 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
447 BIT(3), 400),
448 RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100,
449 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
450 BIT(4), 400),
451 RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100,
452 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
453 BIT(5), 400),
454 RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
455 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
456 BIT(6), 400),
457 RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100,
458 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
459 BIT(7), 400),
460 RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8",
461 RK808_DCDC_EN_REG, BIT(5)),
462 RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12",
463 RK808_DCDC_EN_REG, BIT(6)),
464};
465
466static const struct regulator_desc rk818_reg[] = {
467 {
468 .name = "DCDC_REG1",
469 .supply_name = "vcc1",
470 .of_match = of_match_ptr("DCDC_REG1"),
471 .regulators_node = of_match_ptr("regulators"),
472 .id = RK818_ID_DCDC1,
473 .ops = &rk808_reg_ops,
474 .type = REGULATOR_VOLTAGE,
475 .min_uV = 712500,
476 .uV_step = 12500,
477 .n_voltages = 64,
478 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
479 .vsel_mask = RK818_BUCK_VSEL_MASK,
480 .enable_reg = RK818_DCDC_EN_REG,
481 .enable_mask = BIT(0),
482 .owner = THIS_MODULE,
483 }, {
484 .name = "DCDC_REG2",
485 .supply_name = "vcc2",
486 .of_match = of_match_ptr("DCDC_REG2"),
487 .regulators_node = of_match_ptr("regulators"),
488 .id = RK818_ID_DCDC2,
489 .ops = &rk808_reg_ops,
490 .type = REGULATOR_VOLTAGE,
491 .min_uV = 712500,
492 .uV_step = 12500,
493 .n_voltages = 64,
494 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
495 .vsel_mask = RK818_BUCK_VSEL_MASK,
496 .enable_reg = RK818_DCDC_EN_REG,
497 .enable_mask = BIT(1),
498 .owner = THIS_MODULE,
499 }, {
500 .name = "DCDC_REG3",
501 .supply_name = "vcc3",
502 .of_match = of_match_ptr("DCDC_REG3"),
503 .regulators_node = of_match_ptr("regulators"),
504 .id = RK818_ID_DCDC3,
505 .ops = &rk808_switch_ops,
506 .type = REGULATOR_VOLTAGE,
507 .n_voltages = 1,
508 .enable_reg = RK818_DCDC_EN_REG,
509 .enable_mask = BIT(2),
510 .owner = THIS_MODULE,
511 },
512 RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
513 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
514 RK818_DCDC_EN_REG, BIT(3), 0),
515 RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
516 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
517 RK818_DCDC_EN_REG, BIT(4), 0),
518 RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
519 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
520 BIT(0), 400),
521 RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
522 RK818_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
523 BIT(1), 400),
524 {
525 .name = "LDO_REG3",
526 .supply_name = "vcc7",
527 .of_match = of_match_ptr("LDO_REG3"),
528 .regulators_node = of_match_ptr("regulators"),
529 .id = RK818_ID_LDO3,
530 .ops = &rk808_reg_ops_ranges,
531 .type = REGULATOR_VOLTAGE,
532 .n_voltages = 16,
533 .linear_ranges = rk808_ldo3_voltage_ranges,
534 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
535 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
536 .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
537 .enable_reg = RK818_LDO_EN_REG,
538 .enable_mask = BIT(2),
539 .enable_time = 400,
540 .owner = THIS_MODULE,
541 },
542 RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
543 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
544 BIT(3), 400),
545 RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
546 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
547 BIT(4), 400),
548 RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
549 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
550 BIT(5), 400),
551 RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
552 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
553 BIT(6), 400),
554 RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
555 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
556 BIT(7), 400),
557 RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
558 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
559 RK818_DCDC_EN_REG, BIT(5), 400),
560 RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
561 RK818_DCDC_EN_REG, BIT(6)),
562 RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
563 RK818_H5V_EN_REG, BIT(0)),
564 RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
565 RK818_DCDC_EN_REG, BIT(7)),
566};
567
568static int rk808_regulator_dt_parse_pdata(struct device *dev,
569 struct device *client_dev,
570 struct regmap *map,
571 struct rk808_regulator_data *pdata)
572{
573 struct device_node *np;
574 int tmp, ret = 0, i;
575
576 np = of_get_child_by_name(client_dev->of_node, "regulators");
577 if (!np)
578 return -ENXIO;
579
580 for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
581 pdata->dvs_gpio[i] =
582 devm_gpiod_get_index_optional(client_dev, "dvs", i,
583 GPIOD_OUT_LOW);
584 if (IS_ERR(pdata->dvs_gpio[i])) {
585 ret = PTR_ERR(pdata->dvs_gpio[i]);
586 dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
587 goto dt_parse_end;
588 }
589
590 if (!pdata->dvs_gpio[i]) {
591 dev_warn(dev, "there is no dvs%d gpio\n", i);
592 continue;
593 }
594
595 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
596 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
597 gpiod_is_active_low(pdata->dvs_gpio[i]) ?
598 0 : tmp);
599 }
600
601dt_parse_end:
602 of_node_put(np);
603 return ret;
604}
605
606static int rk808_regulator_probe(struct platform_device *pdev)
607{
608 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
609 struct i2c_client *client = rk808->i2c;
610 struct regulator_config config = {};
611 struct regulator_dev *rk808_rdev;
612 struct rk808_regulator_data *pdata;
613 const struct regulator_desc *regulators;
614 int ret, i, nregulators;
615
616 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
617 if (!pdata)
618 return -ENOMEM;
619
620 ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
621 rk808->regmap, pdata);
622 if (ret < 0)
623 return ret;
624
625 platform_set_drvdata(pdev, pdata);
626
627 switch (rk808->variant) {
628 case RK808_ID:
629 regulators = rk808_reg;
630 nregulators = RK808_NUM_REGULATORS;
631 break;
632 case RK818_ID:
633 regulators = rk818_reg;
634 nregulators = RK818_NUM_REGULATORS;
635 break;
636 default:
637 dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
638 rk808->variant);
639 return -EINVAL;
640 }
641
642 config.dev = &client->dev;
643 config.driver_data = pdata;
644 config.regmap = rk808->regmap;
645
646
647 for (i = 0; i < nregulators; i++) {
648 rk808_rdev = devm_regulator_register(&pdev->dev,
649 ®ulators[i], &config);
650 if (IS_ERR(rk808_rdev)) {
651 dev_err(&client->dev,
652 "failed to register %d regulator\n", i);
653 return PTR_ERR(rk808_rdev);
654 }
655 }
656
657 return 0;
658}
659
660static struct platform_driver rk808_regulator_driver = {
661 .probe = rk808_regulator_probe,
662 .driver = {
663 .name = "rk808-regulator"
664 },
665};
666
667module_platform_driver(rk808_regulator_driver);
668
669MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs");
670MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
671MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
672MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
673MODULE_LICENSE("GPL");
674MODULE_ALIAS("platform:rk808-regulator");
675
