1 /*
2 * Regulator driver for Rockchip RK808/RK818
3 *
4 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
5 *
6 * Author: Chris Zhong <zyw@rock-chips.com>
7 * Author: Zhang Qing <zhangqing@rock-chips.com>
8 *
9 * Copyright (C) 2016 PHYTEC Messtechnik GmbH
10 *
11 * Author: Wadim Egorov <w.egorov@phytec.de>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms and conditions of the GNU General Public License,
15 * version 2, as published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
20 * more details.
21 */
22
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 /* Field Definitions */
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 /* Ramp rate definitions for buck1 / buck2 only */
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 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
57 #define RK808_SLP_REG_OFFSET 1
58
59 /* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */
60 #define RK808_DVS_REG_OFFSET 2
61
62 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
63 #define RK808_SLP_SET_OFF_REG_OFFSET 2
64
65 /* max steps for increase voltage of Buck1/2, equal 100mv*/
66 #define MAX_STEPS_ONE_TIME 8
67
68 #define RK805_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 = &rk805_reg_ops, \
87 }
88
89 #define RK8XX_DESC(_id, _match, _supply, _min, _max, _step, _vreg, \
90 _vmask, _ereg, _emask, _etime) \
91 [_id] = { \
92 .name = (_match), \
93 .supply_name = (_supply), \
94 .of_match = of_match_ptr(_match), \
95 .regulators_node = of_match_ptr("regulators"), \
96 .type = REGULATOR_VOLTAGE, \
97 .id = (_id), \
98 .n_voltages = (((_max) - (_min)) / (_step) + 1), \
99 .owner = THIS_MODULE, \
100 .min_uV = (_min) * 1000, \
101 .uV_step = (_step) * 1000, \
102 .vsel_reg = (_vreg), \
103 .vsel_mask = (_vmask), \
104 .enable_reg = (_ereg), \
105 .enable_mask = (_emask), \
106 .enable_time = (_etime), \
107 .ops = &rk808_reg_ops, \
108 }
109
110 #define RK8XX_DESC_SWITCH(_id, _match, _supply, _ereg, _emask) \
111 [_id] = { \
112 .name = (_match), \
113 .supply_name = (_supply), \
114 .of_match = of_match_ptr(_match), \
115 .regulators_node = of_match_ptr("regulators"), \
116 .type = REGULATOR_VOLTAGE, \
117 .id = (_id), \
118 .enable_reg = (_ereg), \
119 .enable_mask = (_emask), \
120 .owner = THIS_MODULE, \
121 .ops = &rk808_switch_ops \
122 }
123
124
125 struct rk808_regulator_data {
126 struct gpio_desc *dvs_gpio[2];
127 };
128
129 static const int rk808_buck_config_regs[] = {
130 RK808_BUCK1_CONFIG_REG,
131 RK808_BUCK2_CONFIG_REG,
132 RK808_BUCK3_CONFIG_REG,
133 RK808_BUCK4_CONFIG_REG,
134 };
135
136 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
137 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
138 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
139 };
140
rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev * rdev)141 static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
142 {
143 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
144 int id = rdev_get_id(rdev);
145 struct gpio_desc *gpio = pdata->dvs_gpio[id];
146 unsigned int val;
147 int ret;
148
149 if (!gpio || gpiod_get_value(gpio) == 0)
150 return regulator_get_voltage_sel_regmap(rdev);
151
152 ret = regmap_read(rdev->regmap,
153 rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
154 &val);
155 if (ret != 0)
156 return ret;
157
158 val &= rdev->desc->vsel_mask;
159 val >>= ffs(rdev->desc->vsel_mask) - 1;
160
161 return val;
162 }
163
rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev * rdev,unsigned sel)164 static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
165 unsigned sel)
166 {
167 int ret, delta_sel;
168 unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;
169
170 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
171 if (ret != 0)
172 return ret;
173
174 tmp = val & ~mask;
175 old_sel = val & mask;
176 old_sel >>= ffs(mask) - 1;
177 delta_sel = sel - old_sel;
178
179 /*
180 * If directly modify the register to change the voltage, we will face
181 * the risk of overshoot. Put it into a multi-step, can effectively
182 * avoid this problem, a step is 100mv here.
183 */
184 while (delta_sel > MAX_STEPS_ONE_TIME) {
185 old_sel += MAX_STEPS_ONE_TIME;
186 val = old_sel << (ffs(mask) - 1);
187 val |= tmp;
188
189 /*
190 * i2c is 400kHz (2.5us per bit) and we must transmit _at least_
191 * 3 bytes (24 bits) plus start and stop so 26 bits. So we've
192 * got more than 65 us between each voltage change and thus
193 * won't ramp faster than ~1500 uV / us.
194 */
195 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
196 delta_sel = sel - old_sel;
197 }
198
199 sel <<= ffs(mask) - 1;
200 val = tmp | sel;
201 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
202
203 /*
204 * When we change the voltage register directly, the ramp rate is about
205 * 100000uv/us, wait 1us to make sure the target voltage to be stable,
206 * so we needn't wait extra time after that.
207 */
208 udelay(1);
209
210 return ret;
211 }
212
rk808_buck1_2_set_voltage_sel(struct regulator_dev * rdev,unsigned sel)213 static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
214 unsigned sel)
215 {
216 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
217 int id = rdev_get_id(rdev);
218 struct gpio_desc *gpio = pdata->dvs_gpio[id];
219 unsigned int reg = rdev->desc->vsel_reg;
220 unsigned old_sel;
221 int ret, gpio_level;
222
223 if (!gpio)
224 return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);
225
226 gpio_level = gpiod_get_value(gpio);
227 if (gpio_level == 0) {
228 reg += RK808_DVS_REG_OFFSET;
229 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
230 } else {
231 ret = regmap_read(rdev->regmap,
232 reg + RK808_DVS_REG_OFFSET,
233 &old_sel);
234 }
235
236 if (ret != 0)
237 return ret;
238
239 sel <<= ffs(rdev->desc->vsel_mask) - 1;
240 sel |= old_sel & ~rdev->desc->vsel_mask;
241
242 ret = regmap_write(rdev->regmap, reg, sel);
243 if (ret)
244 return ret;
245
246 gpiod_set_value(gpio, !gpio_level);
247
248 return ret;
249 }
250
rk808_buck1_2_set_voltage_time_sel(struct regulator_dev * rdev,unsigned int old_selector,unsigned int new_selector)251 static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
252 unsigned int old_selector,
253 unsigned int new_selector)
254 {
255 struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
256 int id = rdev_get_id(rdev);
257 struct gpio_desc *gpio = pdata->dvs_gpio[id];
258
259 /* if there is no dvs1/2 pin, we don't need wait extra time here. */
260 if (!gpio)
261 return 0;
262
263 return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
264 }
265
rk808_set_ramp_delay(struct regulator_dev * rdev,int ramp_delay)266 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
267 {
268 unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
269 unsigned int reg = rk808_buck_config_regs[rdev_get_id(rdev)];
270
271 switch (ramp_delay) {
272 case 1 ... 2000:
273 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
274 break;
275 case 2001 ... 4000:
276 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
277 break;
278 case 4001 ... 6000:
279 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
280 break;
281 case 6001 ... 10000:
282 break;
283 default:
284 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
285 rdev->desc->name, ramp_delay);
286 }
287
288 return regmap_update_bits(rdev->regmap, reg,
289 RK808_RAMP_RATE_MASK, ramp_value);
290 }
291
rk808_set_suspend_voltage(struct regulator_dev * rdev,int uv)292 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
293 {
294 unsigned int reg;
295 int sel = regulator_map_voltage_linear(rdev, uv, uv);
296
297 if (sel < 0)
298 return -EINVAL;
299
300 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
301
302 return regmap_update_bits(rdev->regmap, reg,
303 rdev->desc->vsel_mask,
304 sel);
305 }
306
rk808_set_suspend_voltage_range(struct regulator_dev * rdev,int uv)307 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv)
308 {
309 unsigned int reg;
310 int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
311
312 if (sel < 0)
313 return -EINVAL;
314
315 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
316
317 return regmap_update_bits(rdev->regmap, reg,
318 rdev->desc->vsel_mask,
319 sel);
320 }
321
rk805_set_suspend_enable(struct regulator_dev * rdev)322 static int rk805_set_suspend_enable(struct regulator_dev *rdev)
323 {
324 unsigned int reg;
325
326 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
327
328 return regmap_update_bits(rdev->regmap, reg,
329 rdev->desc->enable_mask,
330 rdev->desc->enable_mask);
331 }
332
rk805_set_suspend_disable(struct regulator_dev * rdev)333 static int rk805_set_suspend_disable(struct regulator_dev *rdev)
334 {
335 unsigned int reg;
336
337 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
338
339 return regmap_update_bits(rdev->regmap, reg,
340 rdev->desc->enable_mask,
341 0);
342 }
343
rk808_set_suspend_enable(struct regulator_dev * rdev)344 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
345 {
346 unsigned int reg;
347
348 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
349
350 return regmap_update_bits(rdev->regmap, reg,
351 rdev->desc->enable_mask,
352 0);
353 }
354
rk808_set_suspend_disable(struct regulator_dev * rdev)355 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
356 {
357 unsigned int reg;
358
359 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
360
361 return regmap_update_bits(rdev->regmap, reg,
362 rdev->desc->enable_mask,
363 rdev->desc->enable_mask);
364 }
365
366 static struct regulator_ops rk805_reg_ops = {
367 .list_voltage = regulator_list_voltage_linear,
368 .map_voltage = regulator_map_voltage_linear,
369 .get_voltage_sel = regulator_get_voltage_sel_regmap,
370 .set_voltage_sel = regulator_set_voltage_sel_regmap,
371 .enable = regulator_enable_regmap,
372 .disable = regulator_disable_regmap,
373 .is_enabled = regulator_is_enabled_regmap,
374 .set_suspend_voltage = rk808_set_suspend_voltage,
375 .set_suspend_enable = rk805_set_suspend_enable,
376 .set_suspend_disable = rk805_set_suspend_disable,
377 };
378
379 static struct regulator_ops rk805_switch_ops = {
380 .enable = regulator_enable_regmap,
381 .disable = regulator_disable_regmap,
382 .is_enabled = regulator_is_enabled_regmap,
383 .set_suspend_enable = rk805_set_suspend_enable,
384 .set_suspend_disable = rk805_set_suspend_disable,
385 };
386
387 static struct regulator_ops rk808_buck1_2_ops = {
388 .list_voltage = regulator_list_voltage_linear,
389 .map_voltage = regulator_map_voltage_linear,
390 .get_voltage_sel = rk808_buck1_2_get_voltage_sel_regmap,
391 .set_voltage_sel = rk808_buck1_2_set_voltage_sel,
392 .set_voltage_time_sel = rk808_buck1_2_set_voltage_time_sel,
393 .enable = regulator_enable_regmap,
394 .disable = regulator_disable_regmap,
395 .is_enabled = regulator_is_enabled_regmap,
396 .set_ramp_delay = rk808_set_ramp_delay,
397 .set_suspend_voltage = rk808_set_suspend_voltage,
398 .set_suspend_enable = rk808_set_suspend_enable,
399 .set_suspend_disable = rk808_set_suspend_disable,
400 };
401
402 static struct regulator_ops rk808_reg_ops = {
403 .list_voltage = regulator_list_voltage_linear,
404 .map_voltage = regulator_map_voltage_linear,
405 .get_voltage_sel = regulator_get_voltage_sel_regmap,
406 .set_voltage_sel = regulator_set_voltage_sel_regmap,
407 .enable = regulator_enable_regmap,
408 .disable = regulator_disable_regmap,
409 .is_enabled = regulator_is_enabled_regmap,
410 .set_suspend_voltage = rk808_set_suspend_voltage,
411 .set_suspend_enable = rk808_set_suspend_enable,
412 .set_suspend_disable = rk808_set_suspend_disable,
413 };
414
415 static struct regulator_ops rk808_reg_ops_ranges = {
416 .list_voltage = regulator_list_voltage_linear_range,
417 .map_voltage = regulator_map_voltage_linear_range,
418 .get_voltage_sel = regulator_get_voltage_sel_regmap,
419 .set_voltage_sel = regulator_set_voltage_sel_regmap,
420 .enable = regulator_enable_regmap,
421 .disable = regulator_disable_regmap,
422 .is_enabled = regulator_is_enabled_regmap,
423 .set_suspend_voltage = rk808_set_suspend_voltage_range,
424 .set_suspend_enable = rk808_set_suspend_enable,
425 .set_suspend_disable = rk808_set_suspend_disable,
426 };
427
428 static struct regulator_ops rk808_switch_ops = {
429 .enable = regulator_enable_regmap,
430 .disable = regulator_disable_regmap,
431 .is_enabled = regulator_is_enabled_regmap,
432 .set_suspend_enable = rk808_set_suspend_enable,
433 .set_suspend_disable = rk808_set_suspend_disable,
434 };
435
436 static const struct regulator_desc rk805_reg[] = {
437 {
438 .name = "DCDC_REG1",
439 .supply_name = "vcc1",
440 .of_match = of_match_ptr("DCDC_REG1"),
441 .regulators_node = of_match_ptr("regulators"),
442 .id = RK805_ID_DCDC1,
443 .ops = &rk805_reg_ops,
444 .type = REGULATOR_VOLTAGE,
445 .min_uV = 712500,
446 .uV_step = 12500,
447 .n_voltages = 64,
448 .vsel_reg = RK805_BUCK1_ON_VSEL_REG,
449 .vsel_mask = RK818_BUCK_VSEL_MASK,
450 .enable_reg = RK805_DCDC_EN_REG,
451 .enable_mask = BIT(0),
452 .owner = THIS_MODULE,
453 }, {
454 .name = "DCDC_REG2",
455 .supply_name = "vcc2",
456 .of_match = of_match_ptr("DCDC_REG2"),
457 .regulators_node = of_match_ptr("regulators"),
458 .id = RK805_ID_DCDC2,
459 .ops = &rk805_reg_ops,
460 .type = REGULATOR_VOLTAGE,
461 .min_uV = 712500,
462 .uV_step = 12500,
463 .n_voltages = 64,
464 .vsel_reg = RK805_BUCK2_ON_VSEL_REG,
465 .vsel_mask = RK818_BUCK_VSEL_MASK,
466 .enable_reg = RK805_DCDC_EN_REG,
467 .enable_mask = BIT(1),
468 .owner = THIS_MODULE,
469 }, {
470 .name = "DCDC_REG3",
471 .supply_name = "vcc3",
472 .of_match = of_match_ptr("DCDC_REG3"),
473 .regulators_node = of_match_ptr("regulators"),
474 .id = RK805_ID_DCDC3,
475 .ops = &rk805_switch_ops,
476 .type = REGULATOR_VOLTAGE,
477 .n_voltages = 1,
478 .enable_reg = RK805_DCDC_EN_REG,
479 .enable_mask = BIT(2),
480 .owner = THIS_MODULE,
481 },
482
483 RK805_DESC(RK805_ID_DCDC4, "DCDC_REG4", "vcc4", 800, 3400, 100,
484 RK805_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
485 RK805_DCDC_EN_REG, BIT(3), 0),
486
487 RK805_DESC(RK805_ID_LDO1, "LDO_REG1", "vcc5", 800, 3400, 100,
488 RK805_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG,
489 BIT(0), 400),
490 RK805_DESC(RK805_ID_LDO2, "LDO_REG2", "vcc5", 800, 3400, 100,
491 RK805_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG,
492 BIT(1), 400),
493 RK805_DESC(RK805_ID_LDO3, "LDO_REG3", "vcc6", 800, 3400, 100,
494 RK805_LDO3_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG,
495 BIT(2), 400),
496 };
497
498 static const struct regulator_desc rk808_reg[] = {
499 {
500 .name = "DCDC_REG1",
501 .supply_name = "vcc1",
502 .of_match = of_match_ptr("DCDC_REG1"),
503 .regulators_node = of_match_ptr("regulators"),
504 .id = RK808_ID_DCDC1,
505 .ops = &rk808_buck1_2_ops,
506 .type = REGULATOR_VOLTAGE,
507 .min_uV = 712500,
508 .uV_step = 12500,
509 .n_voltages = 64,
510 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
511 .vsel_mask = RK808_BUCK_VSEL_MASK,
512 .enable_reg = RK808_DCDC_EN_REG,
513 .enable_mask = BIT(0),
514 .owner = THIS_MODULE,
515 }, {
516 .name = "DCDC_REG2",
517 .supply_name = "vcc2",
518 .of_match = of_match_ptr("DCDC_REG2"),
519 .regulators_node = of_match_ptr("regulators"),
520 .id = RK808_ID_DCDC2,
521 .ops = &rk808_buck1_2_ops,
522 .type = REGULATOR_VOLTAGE,
523 .min_uV = 712500,
524 .uV_step = 12500,
525 .n_voltages = 64,
526 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
527 .vsel_mask = RK808_BUCK_VSEL_MASK,
528 .enable_reg = RK808_DCDC_EN_REG,
529 .enable_mask = BIT(1),
530 .owner = THIS_MODULE,
531 }, {
532 .name = "DCDC_REG3",
533 .supply_name = "vcc3",
534 .of_match = of_match_ptr("DCDC_REG3"),
535 .regulators_node = of_match_ptr("regulators"),
536 .id = RK808_ID_DCDC3,
537 .ops = &rk808_switch_ops,
538 .type = REGULATOR_VOLTAGE,
539 .n_voltages = 1,
540 .enable_reg = RK808_DCDC_EN_REG,
541 .enable_mask = BIT(2),
542 .owner = THIS_MODULE,
543 },
544 RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100,
545 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK,
546 RK808_DCDC_EN_REG, BIT(3), 0),
547 RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
548 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
549 BIT(0), 400),
550 RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
551 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
552 BIT(1), 400),
553 {
554 .name = "LDO_REG3",
555 .supply_name = "vcc7",
556 .of_match = of_match_ptr("LDO_REG3"),
557 .regulators_node = of_match_ptr("regulators"),
558 .id = RK808_ID_LDO3,
559 .ops = &rk808_reg_ops_ranges,
560 .type = REGULATOR_VOLTAGE,
561 .n_voltages = 16,
562 .linear_ranges = rk808_ldo3_voltage_ranges,
563 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
564 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
565 .vsel_mask = RK808_BUCK4_VSEL_MASK,
566 .enable_reg = RK808_LDO_EN_REG,
567 .enable_mask = BIT(2),
568 .enable_time = 400,
569 .owner = THIS_MODULE,
570 },
571 RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100,
572 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
573 BIT(3), 400),
574 RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100,
575 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
576 BIT(4), 400),
577 RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100,
578 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
579 BIT(5), 400),
580 RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
581 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
582 BIT(6), 400),
583 RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100,
584 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
585 BIT(7), 400),
586 RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8",
587 RK808_DCDC_EN_REG, BIT(5)),
588 RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12",
589 RK808_DCDC_EN_REG, BIT(6)),
590 };
591
592 static const struct regulator_desc rk818_reg[] = {
593 {
594 .name = "DCDC_REG1",
595 .supply_name = "vcc1",
596 .of_match = of_match_ptr("DCDC_REG1"),
597 .regulators_node = of_match_ptr("regulators"),
598 .id = RK818_ID_DCDC1,
599 .ops = &rk808_reg_ops,
600 .type = REGULATOR_VOLTAGE,
601 .min_uV = 712500,
602 .uV_step = 12500,
603 .n_voltages = 64,
604 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
605 .vsel_mask = RK818_BUCK_VSEL_MASK,
606 .enable_reg = RK818_DCDC_EN_REG,
607 .enable_mask = BIT(0),
608 .owner = THIS_MODULE,
609 }, {
610 .name = "DCDC_REG2",
611 .supply_name = "vcc2",
612 .of_match = of_match_ptr("DCDC_REG2"),
613 .regulators_node = of_match_ptr("regulators"),
614 .id = RK818_ID_DCDC2,
615 .ops = &rk808_reg_ops,
616 .type = REGULATOR_VOLTAGE,
617 .min_uV = 712500,
618 .uV_step = 12500,
619 .n_voltages = 64,
620 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
621 .vsel_mask = RK818_BUCK_VSEL_MASK,
622 .enable_reg = RK818_DCDC_EN_REG,
623 .enable_mask = BIT(1),
624 .owner = THIS_MODULE,
625 }, {
626 .name = "DCDC_REG3",
627 .supply_name = "vcc3",
628 .of_match = of_match_ptr("DCDC_REG3"),
629 .regulators_node = of_match_ptr("regulators"),
630 .id = RK818_ID_DCDC3,
631 .ops = &rk808_switch_ops,
632 .type = REGULATOR_VOLTAGE,
633 .n_voltages = 1,
634 .enable_reg = RK818_DCDC_EN_REG,
635 .enable_mask = BIT(2),
636 .owner = THIS_MODULE,
637 },
638 RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
639 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
640 RK818_DCDC_EN_REG, BIT(3), 0),
641 RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
642 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
643 RK818_DCDC_EN_REG, BIT(4), 0),
644 RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
645 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
646 BIT(0), 400),
647 RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
648 RK818_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
649 BIT(1), 400),
650 {
651 .name = "LDO_REG3",
652 .supply_name = "vcc7",
653 .of_match = of_match_ptr("LDO_REG3"),
654 .regulators_node = of_match_ptr("regulators"),
655 .id = RK818_ID_LDO3,
656 .ops = &rk808_reg_ops_ranges,
657 .type = REGULATOR_VOLTAGE,
658 .n_voltages = 16,
659 .linear_ranges = rk808_ldo3_voltage_ranges,
660 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
661 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
662 .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
663 .enable_reg = RK818_LDO_EN_REG,
664 .enable_mask = BIT(2),
665 .enable_time = 400,
666 .owner = THIS_MODULE,
667 },
668 RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
669 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
670 BIT(3), 400),
671 RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
672 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
673 BIT(4), 400),
674 RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
675 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
676 BIT(5), 400),
677 RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
678 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
679 BIT(6), 400),
680 RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
681 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
682 BIT(7), 400),
683 RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
684 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
685 RK818_DCDC_EN_REG, BIT(5), 400),
686 RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
687 RK818_DCDC_EN_REG, BIT(6)),
688 RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
689 RK818_H5V_EN_REG, BIT(0)),
690 RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
691 RK818_DCDC_EN_REG, BIT(7)),
692 };
693
rk808_regulator_dt_parse_pdata(struct device * dev,struct device * client_dev,struct regmap * map,struct rk808_regulator_data * pdata)694 static int rk808_regulator_dt_parse_pdata(struct device *dev,
695 struct device *client_dev,
696 struct regmap *map,
697 struct rk808_regulator_data *pdata)
698 {
699 struct device_node *np;
700 int tmp, ret = 0, i;
701
702 np = of_get_child_by_name(client_dev->of_node, "regulators");
703 if (!np)
704 return -ENXIO;
705
706 for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
707 pdata->dvs_gpio[i] =
708 devm_gpiod_get_index_optional(client_dev, "dvs", i,
709 GPIOD_OUT_LOW);
710 if (IS_ERR(pdata->dvs_gpio[i])) {
711 ret = PTR_ERR(pdata->dvs_gpio[i]);
712 dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
713 goto dt_parse_end;
714 }
715
716 if (!pdata->dvs_gpio[i]) {
717 dev_info(dev, "there is no dvs%d gpio\n", i);
718 continue;
719 }
720
721 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
722 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
723 gpiod_is_active_low(pdata->dvs_gpio[i]) ?
724 0 : tmp);
725 }
726
727 dt_parse_end:
728 of_node_put(np);
729 return ret;
730 }
731
rk808_regulator_probe(struct platform_device * pdev)732 static int rk808_regulator_probe(struct platform_device *pdev)
733 {
734 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
735 struct i2c_client *client = rk808->i2c;
736 struct regulator_config config = {};
737 struct regulator_dev *rk808_rdev;
738 struct rk808_regulator_data *pdata;
739 const struct regulator_desc *regulators;
740 int ret, i, nregulators;
741
742 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
743 if (!pdata)
744 return -ENOMEM;
745
746 ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
747 rk808->regmap, pdata);
748 if (ret < 0)
749 return ret;
750
751 platform_set_drvdata(pdev, pdata);
752
753 switch (rk808->variant) {
754 case RK805_ID:
755 regulators = rk805_reg;
756 nregulators = RK805_NUM_REGULATORS;
757 break;
758 case RK808_ID:
759 regulators = rk808_reg;
760 nregulators = RK808_NUM_REGULATORS;
761 break;
762 case RK818_ID:
763 regulators = rk818_reg;
764 nregulators = RK818_NUM_REGULATORS;
765 break;
766 default:
767 dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
768 rk808->variant);
769 return -EINVAL;
770 }
771
772 config.dev = &client->dev;
773 config.driver_data = pdata;
774 config.regmap = rk808->regmap;
775
776 /* Instantiate the regulators */
777 for (i = 0; i < nregulators; i++) {
778 rk808_rdev = devm_regulator_register(&pdev->dev,
779 ®ulators[i], &config);
780 if (IS_ERR(rk808_rdev)) {
781 dev_err(&client->dev,
782 "failed to register %d regulator\n", i);
783 return PTR_ERR(rk808_rdev);
784 }
785 }
786
787 return 0;
788 }
789
790 static struct platform_driver rk808_regulator_driver = {
791 .probe = rk808_regulator_probe,
792 .driver = {
793 .name = "rk808-regulator"
794 },
795 };
796
797 module_platform_driver(rk808_regulator_driver);
798
799 MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs");
800 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
801 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
802 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
803 MODULE_LICENSE("GPL");
804 MODULE_ALIAS("platform:rk808-regulator");
805