Merge branch 'for-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux-2.6-microblaze.git] / drivers / mfd / rk808.c
1 /*
2  * MFD core 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/i2c.h>
24 #include <linux/interrupt.h>
25 #include <linux/mfd/rk808.h>
26 #include <linux/mfd/core.h>
27 #include <linux/module.h>
28 #include <linux/of_device.h>
29 #include <linux/regmap.h>
30
31 struct rk808_reg_data {
32         int addr;
33         int mask;
34         int value;
35 };
36
37 static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
38 {
39         /*
40          * Notes:
41          * - Technically the ROUND_30s bit makes RTC_CTRL_REG volatile, but
42          *   we don't use that feature.  It's better to cache.
43          * - It's unlikely we care that RK808_DEVCTRL_REG is volatile since
44          *   bits are cleared in case when we shutoff anyway, but better safe.
45          */
46
47         switch (reg) {
48         case RK808_SECONDS_REG ... RK808_WEEKS_REG:
49         case RK808_RTC_STATUS_REG:
50         case RK808_VB_MON_REG:
51         case RK808_THERMAL_REG:
52         case RK808_DCDC_UV_STS_REG:
53         case RK808_LDO_UV_STS_REG:
54         case RK808_DCDC_PG_REG:
55         case RK808_LDO_PG_REG:
56         case RK808_DEVCTRL_REG:
57         case RK808_INT_STS_REG1:
58         case RK808_INT_STS_REG2:
59                 return true;
60         }
61
62         return false;
63 }
64
65 static const struct regmap_config rk818_regmap_config = {
66         .reg_bits = 8,
67         .val_bits = 8,
68         .max_register = RK818_USB_CTRL_REG,
69         .cache_type = REGCACHE_RBTREE,
70         .volatile_reg = rk808_is_volatile_reg,
71 };
72
73 static const struct regmap_config rk805_regmap_config = {
74         .reg_bits = 8,
75         .val_bits = 8,
76         .max_register = RK805_OFF_SOURCE_REG,
77         .cache_type = REGCACHE_RBTREE,
78         .volatile_reg = rk808_is_volatile_reg,
79 };
80
81 static const struct regmap_config rk808_regmap_config = {
82         .reg_bits = 8,
83         .val_bits = 8,
84         .max_register = RK808_IO_POL_REG,
85         .cache_type = REGCACHE_RBTREE,
86         .volatile_reg = rk808_is_volatile_reg,
87 };
88
89 static struct resource rtc_resources[] = {
90         {
91                 .start  = RK808_IRQ_RTC_ALARM,
92                 .end    = RK808_IRQ_RTC_ALARM,
93                 .flags  = IORESOURCE_IRQ,
94         }
95 };
96
97 static struct resource rk805_key_resources[] = {
98         {
99                 .start  = RK805_IRQ_PWRON_FALL,
100                 .end    = RK805_IRQ_PWRON_FALL,
101                 .flags  = IORESOURCE_IRQ,
102         },
103         {
104                 .start  = RK805_IRQ_PWRON_RISE,
105                 .end    = RK805_IRQ_PWRON_RISE,
106                 .flags  = IORESOURCE_IRQ,
107         }
108 };
109
110 static const struct mfd_cell rk805s[] = {
111         { .name = "rk808-clkout", },
112         { .name = "rk808-regulator", },
113         { .name = "rk805-pinctrl", },
114         {
115                 .name = "rk808-rtc",
116                 .num_resources = ARRAY_SIZE(rtc_resources),
117                 .resources = &rtc_resources[0],
118         },
119         {       .name = "rk805-pwrkey",
120                 .num_resources = ARRAY_SIZE(rk805_key_resources),
121                 .resources = &rk805_key_resources[0],
122         },
123 };
124
125 static const struct mfd_cell rk808s[] = {
126         { .name = "rk808-clkout", },
127         { .name = "rk808-regulator", },
128         {
129                 .name = "rk808-rtc",
130                 .num_resources = ARRAY_SIZE(rtc_resources),
131                 .resources = rtc_resources,
132         },
133 };
134
135 static const struct mfd_cell rk818s[] = {
136         { .name = "rk808-clkout", },
137         { .name = "rk808-regulator", },
138         {
139                 .name = "rk808-rtc",
140                 .num_resources = ARRAY_SIZE(rtc_resources),
141                 .resources = rtc_resources,
142         },
143 };
144
145 static const struct rk808_reg_data rk805_pre_init_reg[] = {
146         {RK805_BUCK1_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
147                                  RK805_BUCK1_2_ILMAX_4000MA},
148         {RK805_BUCK2_CONFIG_REG, RK805_BUCK1_2_ILMAX_MASK,
149                                  RK805_BUCK1_2_ILMAX_4000MA},
150         {RK805_BUCK3_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
151                                  RK805_BUCK3_ILMAX_3000MA},
152         {RK805_BUCK4_CONFIG_REG, RK805_BUCK3_4_ILMAX_MASK,
153                                  RK805_BUCK4_ILMAX_3500MA},
154         {RK805_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK, BUCK_ILMIN_400MA},
155         {RK805_GPIO_IO_POL_REG, SLP_SD_MSK, SLEEP_FUN},
156         {RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C},
157 };
158
159 static const struct rk808_reg_data rk808_pre_init_reg[] = {
160         { RK808_BUCK3_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_150MA },
161         { RK808_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_200MA },
162         { RK808_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
163         { RK808_BUCK1_CONFIG_REG, BUCK1_RATE_MASK,  BUCK_ILMIN_200MA },
164         { RK808_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_200MA },
165         { RK808_DCDC_UV_ACT_REG,  BUCK_UV_ACT_MASK, BUCK_UV_ACT_DISABLE},
166         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
167                                                     VB_LO_SEL_3500MV },
168 };
169
170 static const struct rk808_reg_data rk818_pre_init_reg[] = {
171         /* improve efficiency */
172         { RK818_BUCK2_CONFIG_REG, BUCK2_RATE_MASK,  BUCK_ILMIN_250MA },
173         { RK818_BUCK4_CONFIG_REG, BUCK_ILMIN_MASK,  BUCK_ILMIN_250MA },
174         { RK818_BOOST_CONFIG_REG, BOOST_ILMIN_MASK, BOOST_ILMIN_100MA },
175         { RK818_USB_CTRL_REG,     RK818_USB_ILIM_SEL_MASK,
176                                                     RK818_USB_ILMIN_2000MA },
177         /* close charger when usb lower then 3.4V */
178         { RK818_USB_CTRL_REG,     RK818_USB_CHG_SD_VSEL_MASK,
179                                                     (0x7 << 4) },
180         /* no action when vref */
181         { RK818_H5V_EN_REG,       BIT(1),           RK818_REF_RDY_CTRL },
182         /* enable HDMI 5V */
183         { RK818_H5V_EN_REG,       BIT(0),           RK818_H5V_EN },
184         { RK808_VB_MON_REG,       MASK_ALL,         VB_LO_ACT |
185                                                     VB_LO_SEL_3500MV },
186 };
187
188 static const struct regmap_irq rk805_irqs[] = {
189         [RK805_IRQ_PWRON_RISE] = {
190                 .mask = RK805_IRQ_PWRON_RISE_MSK,
191                 .reg_offset = 0,
192         },
193         [RK805_IRQ_VB_LOW] = {
194                 .mask = RK805_IRQ_VB_LOW_MSK,
195                 .reg_offset = 0,
196         },
197         [RK805_IRQ_PWRON] = {
198                 .mask = RK805_IRQ_PWRON_MSK,
199                 .reg_offset = 0,
200         },
201         [RK805_IRQ_PWRON_LP] = {
202                 .mask = RK805_IRQ_PWRON_LP_MSK,
203                 .reg_offset = 0,
204         },
205         [RK805_IRQ_HOTDIE] = {
206                 .mask = RK805_IRQ_HOTDIE_MSK,
207                 .reg_offset = 0,
208         },
209         [RK805_IRQ_RTC_ALARM] = {
210                 .mask = RK805_IRQ_RTC_ALARM_MSK,
211                 .reg_offset = 0,
212         },
213         [RK805_IRQ_RTC_PERIOD] = {
214                 .mask = RK805_IRQ_RTC_PERIOD_MSK,
215                 .reg_offset = 0,
216         },
217         [RK805_IRQ_PWRON_FALL] = {
218                 .mask = RK805_IRQ_PWRON_FALL_MSK,
219                 .reg_offset = 0,
220         },
221 };
222
223 static const struct regmap_irq rk808_irqs[] = {
224         /* INT_STS */
225         [RK808_IRQ_VOUT_LO] = {
226                 .mask = RK808_IRQ_VOUT_LO_MSK,
227                 .reg_offset = 0,
228         },
229         [RK808_IRQ_VB_LO] = {
230                 .mask = RK808_IRQ_VB_LO_MSK,
231                 .reg_offset = 0,
232         },
233         [RK808_IRQ_PWRON] = {
234                 .mask = RK808_IRQ_PWRON_MSK,
235                 .reg_offset = 0,
236         },
237         [RK808_IRQ_PWRON_LP] = {
238                 .mask = RK808_IRQ_PWRON_LP_MSK,
239                 .reg_offset = 0,
240         },
241         [RK808_IRQ_HOTDIE] = {
242                 .mask = RK808_IRQ_HOTDIE_MSK,
243                 .reg_offset = 0,
244         },
245         [RK808_IRQ_RTC_ALARM] = {
246                 .mask = RK808_IRQ_RTC_ALARM_MSK,
247                 .reg_offset = 0,
248         },
249         [RK808_IRQ_RTC_PERIOD] = {
250                 .mask = RK808_IRQ_RTC_PERIOD_MSK,
251                 .reg_offset = 0,
252         },
253
254         /* INT_STS2 */
255         [RK808_IRQ_PLUG_IN_INT] = {
256                 .mask = RK808_IRQ_PLUG_IN_INT_MSK,
257                 .reg_offset = 1,
258         },
259         [RK808_IRQ_PLUG_OUT_INT] = {
260                 .mask = RK808_IRQ_PLUG_OUT_INT_MSK,
261                 .reg_offset = 1,
262         },
263 };
264
265 static const struct regmap_irq rk818_irqs[] = {
266         /* INT_STS */
267         [RK818_IRQ_VOUT_LO] = {
268                 .mask = RK818_IRQ_VOUT_LO_MSK,
269                 .reg_offset = 0,
270         },
271         [RK818_IRQ_VB_LO] = {
272                 .mask = RK818_IRQ_VB_LO_MSK,
273                 .reg_offset = 0,
274         },
275         [RK818_IRQ_PWRON] = {
276                 .mask = RK818_IRQ_PWRON_MSK,
277                 .reg_offset = 0,
278         },
279         [RK818_IRQ_PWRON_LP] = {
280                 .mask = RK818_IRQ_PWRON_LP_MSK,
281                 .reg_offset = 0,
282         },
283         [RK818_IRQ_HOTDIE] = {
284                 .mask = RK818_IRQ_HOTDIE_MSK,
285                 .reg_offset = 0,
286         },
287         [RK818_IRQ_RTC_ALARM] = {
288                 .mask = RK818_IRQ_RTC_ALARM_MSK,
289                 .reg_offset = 0,
290         },
291         [RK818_IRQ_RTC_PERIOD] = {
292                 .mask = RK818_IRQ_RTC_PERIOD_MSK,
293                 .reg_offset = 0,
294         },
295         [RK818_IRQ_USB_OV] = {
296                 .mask = RK818_IRQ_USB_OV_MSK,
297                 .reg_offset = 0,
298         },
299
300         /* INT_STS2 */
301         [RK818_IRQ_PLUG_IN] = {
302                 .mask = RK818_IRQ_PLUG_IN_MSK,
303                 .reg_offset = 1,
304         },
305         [RK818_IRQ_PLUG_OUT] = {
306                 .mask = RK818_IRQ_PLUG_OUT_MSK,
307                 .reg_offset = 1,
308         },
309         [RK818_IRQ_CHG_OK] = {
310                 .mask = RK818_IRQ_CHG_OK_MSK,
311                 .reg_offset = 1,
312         },
313         [RK818_IRQ_CHG_TE] = {
314                 .mask = RK818_IRQ_CHG_TE_MSK,
315                 .reg_offset = 1,
316         },
317         [RK818_IRQ_CHG_TS1] = {
318                 .mask = RK818_IRQ_CHG_TS1_MSK,
319                 .reg_offset = 1,
320         },
321         [RK818_IRQ_TS2] = {
322                 .mask = RK818_IRQ_TS2_MSK,
323                 .reg_offset = 1,
324         },
325         [RK818_IRQ_CHG_CVTLIM] = {
326                 .mask = RK818_IRQ_CHG_CVTLIM_MSK,
327                 .reg_offset = 1,
328         },
329         [RK818_IRQ_DISCHG_ILIM] = {
330                 .mask = RK818_IRQ_DISCHG_ILIM_MSK,
331                 .reg_offset = 1,
332         },
333 };
334
335 static struct regmap_irq_chip rk805_irq_chip = {
336         .name = "rk805",
337         .irqs = rk805_irqs,
338         .num_irqs = ARRAY_SIZE(rk805_irqs),
339         .num_regs = 1,
340         .status_base = RK805_INT_STS_REG,
341         .mask_base = RK805_INT_STS_MSK_REG,
342         .ack_base = RK805_INT_STS_REG,
343         .init_ack_masked = true,
344 };
345
346 static const struct regmap_irq_chip rk808_irq_chip = {
347         .name = "rk808",
348         .irqs = rk808_irqs,
349         .num_irqs = ARRAY_SIZE(rk808_irqs),
350         .num_regs = 2,
351         .irq_reg_stride = 2,
352         .status_base = RK808_INT_STS_REG1,
353         .mask_base = RK808_INT_STS_MSK_REG1,
354         .ack_base = RK808_INT_STS_REG1,
355         .init_ack_masked = true,
356 };
357
358 static const struct regmap_irq_chip rk818_irq_chip = {
359         .name = "rk818",
360         .irqs = rk818_irqs,
361         .num_irqs = ARRAY_SIZE(rk818_irqs),
362         .num_regs = 2,
363         .irq_reg_stride = 2,
364         .status_base = RK818_INT_STS_REG1,
365         .mask_base = RK818_INT_STS_MSK_REG1,
366         .ack_base = RK818_INT_STS_REG1,
367         .init_ack_masked = true,
368 };
369
370 static struct i2c_client *rk808_i2c_client;
371
372 static void rk805_device_shutdown(void)
373 {
374         int ret;
375         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
376
377         if (!rk808) {
378                 dev_warn(&rk808_i2c_client->dev,
379                          "have no rk805, so do nothing here\n");
380                 return;
381         }
382
383         ret = regmap_update_bits(rk808->regmap,
384                                  RK805_DEV_CTRL_REG,
385                                  DEV_OFF, DEV_OFF);
386         if (ret)
387                 dev_err(&rk808_i2c_client->dev, "power off error!\n");
388 }
389
390 static void rk808_device_shutdown(void)
391 {
392         int ret;
393         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
394
395         if (!rk808) {
396                 dev_warn(&rk808_i2c_client->dev,
397                          "have no rk808, so do nothing here\n");
398                 return;
399         }
400
401         ret = regmap_update_bits(rk808->regmap,
402                                  RK808_DEVCTRL_REG,
403                                  DEV_OFF_RST, DEV_OFF_RST);
404         if (ret)
405                 dev_err(&rk808_i2c_client->dev, "power off error!\n");
406 }
407
408 static void rk818_device_shutdown(void)
409 {
410         int ret;
411         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
412
413         if (!rk808) {
414                 dev_warn(&rk808_i2c_client->dev,
415                          "have no rk818, so do nothing here\n");
416                 return;
417         }
418
419         ret = regmap_update_bits(rk808->regmap,
420                                  RK818_DEVCTRL_REG,
421                                  DEV_OFF, DEV_OFF);
422         if (ret)
423                 dev_err(&rk808_i2c_client->dev, "power off error!\n");
424 }
425
426 static const struct of_device_id rk808_of_match[] = {
427         { .compatible = "rockchip,rk805" },
428         { .compatible = "rockchip,rk808" },
429         { .compatible = "rockchip,rk818" },
430         { },
431 };
432 MODULE_DEVICE_TABLE(of, rk808_of_match);
433
434 static int rk808_probe(struct i2c_client *client,
435                        const struct i2c_device_id *id)
436 {
437         struct device_node *np = client->dev.of_node;
438         struct rk808 *rk808;
439         const struct rk808_reg_data *pre_init_reg;
440         const struct mfd_cell *cells;
441         void (*pm_pwroff_fn)(void);
442         int nr_pre_init_regs;
443         int nr_cells;
444         int pm_off = 0, msb, lsb;
445         int ret;
446         int i;
447
448         rk808 = devm_kzalloc(&client->dev, sizeof(*rk808), GFP_KERNEL);
449         if (!rk808)
450                 return -ENOMEM;
451
452         /* Read chip variant */
453         msb = i2c_smbus_read_byte_data(client, RK808_ID_MSB);
454         if (msb < 0) {
455                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
456                         RK808_ID_MSB);
457                 return msb;
458         }
459
460         lsb = i2c_smbus_read_byte_data(client, RK808_ID_LSB);
461         if (lsb < 0) {
462                 dev_err(&client->dev, "failed to read the chip id at 0x%x\n",
463                         RK808_ID_LSB);
464                 return lsb;
465         }
466
467         rk808->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
468         dev_info(&client->dev, "chip id: 0x%x\n", (unsigned int)rk808->variant);
469
470         switch (rk808->variant) {
471         case RK805_ID:
472                 rk808->regmap_cfg = &rk805_regmap_config;
473                 rk808->regmap_irq_chip = &rk805_irq_chip;
474                 pre_init_reg = rk805_pre_init_reg;
475                 nr_pre_init_regs = ARRAY_SIZE(rk805_pre_init_reg);
476                 cells = rk805s;
477                 nr_cells = ARRAY_SIZE(rk805s);
478                 pm_pwroff_fn = rk805_device_shutdown;
479                 break;
480         case RK808_ID:
481                 rk808->regmap_cfg = &rk808_regmap_config;
482                 rk808->regmap_irq_chip = &rk808_irq_chip;
483                 pre_init_reg = rk808_pre_init_reg;
484                 nr_pre_init_regs = ARRAY_SIZE(rk808_pre_init_reg);
485                 cells = rk808s;
486                 nr_cells = ARRAY_SIZE(rk808s);
487                 pm_pwroff_fn = rk808_device_shutdown;
488                 break;
489         case RK818_ID:
490                 rk808->regmap_cfg = &rk818_regmap_config;
491                 rk808->regmap_irq_chip = &rk818_irq_chip;
492                 pre_init_reg = rk818_pre_init_reg;
493                 nr_pre_init_regs = ARRAY_SIZE(rk818_pre_init_reg);
494                 cells = rk818s;
495                 nr_cells = ARRAY_SIZE(rk818s);
496                 pm_pwroff_fn = rk818_device_shutdown;
497                 break;
498         default:
499                 dev_err(&client->dev, "Unsupported RK8XX ID %lu\n",
500                         rk808->variant);
501                 return -EINVAL;
502         }
503
504         rk808->i2c = client;
505         i2c_set_clientdata(client, rk808);
506
507         rk808->regmap = devm_regmap_init_i2c(client, rk808->regmap_cfg);
508         if (IS_ERR(rk808->regmap)) {
509                 dev_err(&client->dev, "regmap initialization failed\n");
510                 return PTR_ERR(rk808->regmap);
511         }
512
513         if (!client->irq) {
514                 dev_err(&client->dev, "No interrupt support, no core IRQ\n");
515                 return -EINVAL;
516         }
517
518         ret = regmap_add_irq_chip(rk808->regmap, client->irq,
519                                   IRQF_ONESHOT, -1,
520                                   rk808->regmap_irq_chip, &rk808->irq_data);
521         if (ret) {
522                 dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
523                 return ret;
524         }
525
526         for (i = 0; i < nr_pre_init_regs; i++) {
527                 ret = regmap_update_bits(rk808->regmap,
528                                         pre_init_reg[i].addr,
529                                         pre_init_reg[i].mask,
530                                         pre_init_reg[i].value);
531                 if (ret) {
532                         dev_err(&client->dev,
533                                 "0x%x write err\n",
534                                 pre_init_reg[i].addr);
535                         return ret;
536                 }
537         }
538
539         ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
540                               cells, nr_cells, NULL, 0,
541                               regmap_irq_get_domain(rk808->irq_data));
542         if (ret) {
543                 dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
544                 goto err_irq;
545         }
546
547         pm_off = of_property_read_bool(np,
548                                 "rockchip,system-power-controller");
549         if (pm_off && !pm_power_off) {
550                 rk808_i2c_client = client;
551                 pm_power_off = pm_pwroff_fn;
552         }
553
554         return 0;
555
556 err_irq:
557         regmap_del_irq_chip(client->irq, rk808->irq_data);
558         return ret;
559 }
560
561 static int rk808_remove(struct i2c_client *client)
562 {
563         struct rk808 *rk808 = i2c_get_clientdata(client);
564
565         regmap_del_irq_chip(client->irq, rk808->irq_data);
566         pm_power_off = NULL;
567
568         return 0;
569 }
570
571 static const struct i2c_device_id rk808_ids[] = {
572         { "rk805" },
573         { "rk808" },
574         { "rk818" },
575         { },
576 };
577 MODULE_DEVICE_TABLE(i2c, rk808_ids);
578
579 static struct i2c_driver rk808_i2c_driver = {
580         .driver = {
581                 .name = "rk808",
582                 .of_match_table = rk808_of_match,
583         },
584         .probe    = rk808_probe,
585         .remove   = rk808_remove,
586         .id_table = rk808_ids,
587 };
588
589 module_i2c_driver(rk808_i2c_driver);
590
591 MODULE_LICENSE("GPL");
592 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
593 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
594 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
595 MODULE_DESCRIPTION("RK808/RK818 PMIC driver");