dfa8d50a5d741461ba24895a4d628bd6cc9b2c72
[sfrench/cifs-2.6.git] / drivers / regulator / rk808-regulator.c
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 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
104 struct rk808_regulator_data {
105         struct gpio_desc *dvs_gpio[2];
106 };
107
108 static 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
115 static 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
120 static 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->desc->id - RK808_ID_DCDC1;
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
143 static 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          * If directly modify the register to change the voltage, we will face
160          * the risk of overshoot. Put it into a multi-step, can effectively
161          * avoid this problem, a step is 100mv here.
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                  * i2c is 400kHz (2.5us per bit) and we must transmit _at least_
170                  * 3 bytes (24 bits) plus start and stop so 26 bits.  So we've
171                  * got more than 65 us between each voltage change and thus
172                  * won't ramp faster than ~1500 uV / us.
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          * When we change the voltage register directly, the ramp rate is about
184          * 100000uv/us, wait 1us to make sure the target voltage to be stable,
185          * so we needn't wait extra time after that.
186          */
187         udelay(1);
188
189         return ret;
190 }
191
192 static 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->desc->id - RK808_ID_DCDC1;
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
230 static 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->desc->id - RK808_ID_DCDC1;
236         struct gpio_desc *gpio = pdata->dvs_gpio[id];
237
238         /* if there is no dvs1/2 pin, we don't need wait extra time here. */
239         if (!gpio)
240                 return 0;
241
242         return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
243 }
244
245 static 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->desc->id -
249                                                   RK808_ID_DCDC1];
250
251         switch (ramp_delay) {
252         case 1 ... 2000:
253                 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
254                 break;
255         case 2001 ... 4000:
256                 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
257                 break;
258         case 4001 ... 6000:
259                 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
260                 break;
261         case 6001 ... 10000:
262                 break;
263         default:
264                 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
265                         rdev->desc->name, ramp_delay);
266         }
267
268         return regmap_update_bits(rdev->regmap, reg,
269                                   RK808_RAMP_RATE_MASK, ramp_value);
270 }
271
272 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
273 {
274         unsigned int reg;
275         int sel = regulator_map_voltage_linear(rdev, uv, uv);
276
277         if (sel < 0)
278                 return -EINVAL;
279
280         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
281
282         return regmap_update_bits(rdev->regmap, reg,
283                                   rdev->desc->vsel_mask,
284                                   sel);
285 }
286
287 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv)
288 {
289         unsigned int reg;
290         int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
291
292         if (sel < 0)
293                 return -EINVAL;
294
295         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
296
297         return regmap_update_bits(rdev->regmap, reg,
298                                   rdev->desc->vsel_mask,
299                                   sel);
300 }
301
302 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
303 {
304         unsigned int reg;
305
306         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
307
308         return regmap_update_bits(rdev->regmap, reg,
309                                   rdev->desc->enable_mask,
310                                   0);
311 }
312
313 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
314 {
315         unsigned int reg;
316
317         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
318
319         return regmap_update_bits(rdev->regmap, reg,
320                                   rdev->desc->enable_mask,
321                                   rdev->desc->enable_mask);
322 }
323
324 static struct regulator_ops rk808_buck1_2_ops = {
325         .list_voltage           = regulator_list_voltage_linear,
326         .map_voltage            = regulator_map_voltage_linear,
327         .get_voltage_sel        = rk808_buck1_2_get_voltage_sel_regmap,
328         .set_voltage_sel        = rk808_buck1_2_set_voltage_sel,
329         .set_voltage_time_sel   = rk808_buck1_2_set_voltage_time_sel,
330         .enable                 = regulator_enable_regmap,
331         .disable                = regulator_disable_regmap,
332         .is_enabled             = regulator_is_enabled_regmap,
333         .set_ramp_delay         = rk808_set_ramp_delay,
334         .set_suspend_voltage    = rk808_set_suspend_voltage,
335         .set_suspend_enable     = rk808_set_suspend_enable,
336         .set_suspend_disable    = rk808_set_suspend_disable,
337 };
338
339 static struct regulator_ops rk808_reg_ops = {
340         .list_voltage           = regulator_list_voltage_linear,
341         .map_voltage            = regulator_map_voltage_linear,
342         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
343         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
344         .enable                 = regulator_enable_regmap,
345         .disable                = regulator_disable_regmap,
346         .is_enabled             = regulator_is_enabled_regmap,
347         .set_suspend_voltage    = rk808_set_suspend_voltage,
348         .set_suspend_enable     = rk808_set_suspend_enable,
349         .set_suspend_disable    = rk808_set_suspend_disable,
350 };
351
352 static struct regulator_ops rk808_reg_ops_ranges = {
353         .list_voltage           = regulator_list_voltage_linear_range,
354         .map_voltage            = regulator_map_voltage_linear_range,
355         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
356         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
357         .enable                 = regulator_enable_regmap,
358         .disable                = regulator_disable_regmap,
359         .is_enabled             = regulator_is_enabled_regmap,
360         .set_suspend_voltage    = rk808_set_suspend_voltage_range,
361         .set_suspend_enable     = rk808_set_suspend_enable,
362         .set_suspend_disable    = rk808_set_suspend_disable,
363 };
364
365 static struct regulator_ops rk808_switch_ops = {
366         .enable                 = regulator_enable_regmap,
367         .disable                = regulator_disable_regmap,
368         .is_enabled             = regulator_is_enabled_regmap,
369         .set_suspend_enable     = rk808_set_suspend_enable,
370         .set_suspend_disable    = rk808_set_suspend_disable,
371 };
372
373 static const struct regulator_desc rk808_reg[] = {
374         {
375                 .name = "DCDC_REG1",
376                 .supply_name = "vcc1",
377                 .of_match = of_match_ptr("DCDC_REG1"),
378                 .regulators_node = of_match_ptr("regulators"),
379                 .id = RK808_ID_DCDC1,
380                 .ops = &rk808_buck1_2_ops,
381                 .type = REGULATOR_VOLTAGE,
382                 .min_uV = 712500,
383                 .uV_step = 12500,
384                 .n_voltages = 64,
385                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
386                 .vsel_mask = RK808_BUCK_VSEL_MASK,
387                 .enable_reg = RK808_DCDC_EN_REG,
388                 .enable_mask = BIT(0),
389                 .owner = THIS_MODULE,
390         }, {
391                 .name = "DCDC_REG2",
392                 .supply_name = "vcc2",
393                 .of_match = of_match_ptr("DCDC_REG2"),
394                 .regulators_node = of_match_ptr("regulators"),
395                 .id = RK808_ID_DCDC2,
396                 .ops = &rk808_buck1_2_ops,
397                 .type = REGULATOR_VOLTAGE,
398                 .min_uV = 712500,
399                 .uV_step = 12500,
400                 .n_voltages = 64,
401                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
402                 .vsel_mask = RK808_BUCK_VSEL_MASK,
403                 .enable_reg = RK808_DCDC_EN_REG,
404                 .enable_mask = BIT(1),
405                 .owner = THIS_MODULE,
406         }, {
407                 .name = "DCDC_REG3",
408                 .supply_name = "vcc3",
409                 .of_match = of_match_ptr("DCDC_REG3"),
410                 .regulators_node = of_match_ptr("regulators"),
411                 .id = RK808_ID_DCDC3,
412                 .ops = &rk808_switch_ops,
413                 .type = REGULATOR_VOLTAGE,
414                 .n_voltages = 1,
415                 .enable_reg = RK808_DCDC_EN_REG,
416                 .enable_mask = BIT(2),
417                 .owner = THIS_MODULE,
418         },
419         RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100,
420                 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK,
421                 RK808_DCDC_EN_REG, BIT(3), 0),
422         RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
423                 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
424                 BIT(0), 400),
425         RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
426                 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
427                 BIT(1), 400),
428         {
429                 .name = "LDO_REG3",
430                 .supply_name = "vcc7",
431                 .of_match = of_match_ptr("LDO_REG3"),
432                 .regulators_node = of_match_ptr("regulators"),
433                 .id = RK808_ID_LDO3,
434                 .ops = &rk808_reg_ops_ranges,
435                 .type = REGULATOR_VOLTAGE,
436                 .n_voltages = 16,
437                 .linear_ranges = rk808_ldo3_voltage_ranges,
438                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
439                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
440                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
441                 .enable_reg = RK808_LDO_EN_REG,
442                 .enable_mask = BIT(2),
443                 .enable_time = 400,
444                 .owner = THIS_MODULE,
445         },
446         RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100,
447                 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
448                 BIT(3), 400),
449         RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100,
450                 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
451                 BIT(4), 400),
452         RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100,
453                 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
454                 BIT(5), 400),
455         RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
456                 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
457                 BIT(6), 400),
458         RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100,
459                 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
460                 BIT(7), 400),
461         RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8",
462                 RK808_DCDC_EN_REG, BIT(5)),
463         RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12",
464                 RK808_DCDC_EN_REG, BIT(6)),
465 };
466
467 static const struct regulator_desc rk818_reg[] = {
468         {
469                 .name = "DCDC_REG1",
470                 .supply_name = "vcc1",
471                 .of_match = of_match_ptr("DCDC_REG1"),
472                 .regulators_node = of_match_ptr("regulators"),
473                 .id = RK818_ID_DCDC1,
474                 .ops = &rk808_reg_ops,
475                 .type = REGULATOR_VOLTAGE,
476                 .min_uV = 712500,
477                 .uV_step = 12500,
478                 .n_voltages = 64,
479                 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
480                 .vsel_mask = RK818_BUCK_VSEL_MASK,
481                 .enable_reg = RK818_DCDC_EN_REG,
482                 .enable_mask = BIT(0),
483                 .owner = THIS_MODULE,
484         }, {
485                 .name = "DCDC_REG2",
486                 .supply_name = "vcc2",
487                 .of_match = of_match_ptr("DCDC_REG2"),
488                 .regulators_node = of_match_ptr("regulators"),
489                 .id = RK818_ID_DCDC2,
490                 .ops = &rk808_reg_ops,
491                 .type = REGULATOR_VOLTAGE,
492                 .min_uV = 712500,
493                 .uV_step = 12500,
494                 .n_voltages = 64,
495                 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
496                 .vsel_mask = RK818_BUCK_VSEL_MASK,
497                 .enable_reg = RK818_DCDC_EN_REG,
498                 .enable_mask = BIT(1),
499                 .owner = THIS_MODULE,
500         }, {
501                 .name = "DCDC_REG3",
502                 .supply_name = "vcc3",
503                 .of_match = of_match_ptr("DCDC_REG3"),
504                 .regulators_node = of_match_ptr("regulators"),
505                 .id = RK818_ID_DCDC3,
506                 .ops = &rk808_switch_ops,
507                 .type = REGULATOR_VOLTAGE,
508                 .n_voltages = 1,
509                 .enable_reg = RK818_DCDC_EN_REG,
510                 .enable_mask = BIT(2),
511                 .owner = THIS_MODULE,
512         },
513         RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
514                 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
515                 RK818_DCDC_EN_REG, BIT(3), 0),
516         RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
517                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
518                 RK818_DCDC_EN_REG, BIT(4), 0),
519         RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
520                 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
521                 BIT(0), 400),
522         RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
523                 RK818_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
524                 BIT(1), 400),
525         {
526                 .name = "LDO_REG3",
527                 .supply_name = "vcc7",
528                 .of_match = of_match_ptr("LDO_REG3"),
529                 .regulators_node = of_match_ptr("regulators"),
530                 .id = RK818_ID_LDO3,
531                 .ops = &rk808_reg_ops_ranges,
532                 .type = REGULATOR_VOLTAGE,
533                 .n_voltages = 16,
534                 .linear_ranges = rk808_ldo3_voltage_ranges,
535                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
536                 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
537                 .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
538                 .enable_reg = RK818_LDO_EN_REG,
539                 .enable_mask = BIT(2),
540                 .enable_time = 400,
541                 .owner = THIS_MODULE,
542         },
543         RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
544                 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
545                 BIT(3), 400),
546         RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
547                 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
548                 BIT(4), 400),
549         RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
550                 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
551                 BIT(5), 400),
552         RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
553                 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
554                 BIT(6), 400),
555         RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
556                 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
557                 BIT(7), 400),
558         RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
559                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
560                 RK818_DCDC_EN_REG, BIT(5), 400),
561         RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
562                 RK818_DCDC_EN_REG, BIT(6)),
563         RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
564                 RK818_H5V_EN_REG, BIT(0)),
565         RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
566                 RK818_DCDC_EN_REG, BIT(7)),
567 };
568
569 static int rk808_regulator_dt_parse_pdata(struct device *dev,
570                                    struct device *client_dev,
571                                    struct regmap *map,
572                                    struct rk808_regulator_data *pdata)
573 {
574         struct device_node *np;
575         int tmp, ret = 0, i;
576
577         np = of_get_child_by_name(client_dev->of_node, "regulators");
578         if (!np)
579                 return -ENXIO;
580
581         for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
582                 pdata->dvs_gpio[i] =
583                         devm_gpiod_get_index_optional(client_dev, "dvs", i,
584                                                       GPIOD_OUT_LOW);
585                 if (IS_ERR(pdata->dvs_gpio[i])) {
586                         ret = PTR_ERR(pdata->dvs_gpio[i]);
587                         dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
588                         goto dt_parse_end;
589                 }
590
591                 if (!pdata->dvs_gpio[i]) {
592                         dev_warn(dev, "there is no dvs%d gpio\n", i);
593                         continue;
594                 }
595
596                 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
597                 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
598                                 gpiod_is_active_low(pdata->dvs_gpio[i]) ?
599                                 0 : tmp);
600         }
601
602 dt_parse_end:
603         of_node_put(np);
604         return ret;
605 }
606
607 static int rk808_regulator_probe(struct platform_device *pdev)
608 {
609         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
610         struct i2c_client *client = rk808->i2c;
611         struct regulator_config config = {};
612         struct regulator_dev *rk808_rdev;
613         struct rk808_regulator_data *pdata;
614         const struct regulator_desc *regulators;
615         int ret, i, nregulators;
616
617         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
618         if (!pdata)
619                 return -ENOMEM;
620
621         ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
622                                              rk808->regmap, pdata);
623         if (ret < 0)
624                 return ret;
625
626         platform_set_drvdata(pdev, pdata);
627
628         switch (rk808->variant) {
629         case RK808_ID:
630                 regulators = rk808_reg;
631                 nregulators = RK808_NUM_REGULATORS;
632                 break;
633         case RK818_ID:
634                 regulators = rk818_reg;
635                 nregulators = RK818_NUM_REGULATORS;
636                 break;
637         default:
638                 dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
639                         rk808->variant);
640                 return -EINVAL;
641         }
642
643         config.dev = &client->dev;
644         config.driver_data = pdata;
645         config.regmap = rk808->regmap;
646
647         /* Instantiate the regulators */
648         for (i = 0; i < nregulators; i++) {
649                 rk808_rdev = devm_regulator_register(&pdev->dev,
650                                                      &regulators[i], &config);
651                 if (IS_ERR(rk808_rdev)) {
652                         dev_err(&client->dev,
653                                 "failed to register %d regulator\n", i);
654                         return PTR_ERR(rk808_rdev);
655                 }
656         }
657
658         return 0;
659 }
660
661 static struct platform_driver rk808_regulator_driver = {
662         .probe = rk808_regulator_probe,
663         .driver = {
664                 .name = "rk808-regulator"
665         },
666 };
667
668 module_platform_driver(rk808_regulator_driver);
669
670 MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs");
671 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
672 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
673 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
674 MODULE_LICENSE("GPL");
675 MODULE_ALIAS("platform:rk808-regulator");