Merge tag 'mfd-3.14-1' of git://git.linaro.org/people/ljones/mfd
[firefly-linux-kernel-4.4.55.git] / drivers / mfd / tps65910.c
1 /*
2  * tps65910.c  --  TI TPS6591x
3  *
4  * Copyright 2010 Texas Instruments Inc.
5  *
6  * Author: Graeme Gregory <gg@slimlogic.co.uk>
7  * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
8  *
9  *  This program is free software; you can redistribute it and/or modify it
10  *  under  the terms of the GNU General  Public License as published by the
11  *  Free Software Foundation;  either version 2 of the License, or (at your
12  *  option) any later version.
13  *
14  */
15
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/slab.h>
21 #include <linux/i2c.h>
22 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/irqdomain.h>
25 #include <linux/mfd/core.h>
26 #include <linux/regmap.h>
27 #include <linux/mfd/tps65910.h>
28 #include <linux/of.h>
29 #include <linux/of_device.h>
30
31 static struct resource rtc_resources[] = {
32         {
33                 .start  = TPS65910_IRQ_RTC_ALARM,
34                 .end    = TPS65910_IRQ_RTC_ALARM,
35                 .flags  = IORESOURCE_IRQ,
36         }
37 };
38
39 static const struct mfd_cell tps65910s[] = {
40         {
41                 .name = "tps65910-gpio",
42         },
43         {
44                 .name = "tps65910-pmic",
45         },
46         {
47                 .name = "tps65910-rtc",
48                 .num_resources = ARRAY_SIZE(rtc_resources),
49                 .resources = &rtc_resources[0],
50         },
51         {
52                 .name = "tps65910-power",
53         },
54 };
55
56
57 static const struct regmap_irq tps65911_irqs[] = {
58         /* INT_STS */
59         [TPS65911_IRQ_PWRHOLD_F] = {
60                 .mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
61                 .reg_offset = 0,
62         },
63         [TPS65911_IRQ_VBAT_VMHI] = {
64                 .mask = INT_MSK_VMBHI_IT_MSK_MASK,
65                 .reg_offset = 0,
66         },
67         [TPS65911_IRQ_PWRON] = {
68                 .mask = INT_MSK_PWRON_IT_MSK_MASK,
69                 .reg_offset = 0,
70         },
71         [TPS65911_IRQ_PWRON_LP] = {
72                 .mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
73                 .reg_offset = 0,
74         },
75         [TPS65911_IRQ_PWRHOLD_R] = {
76                 .mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
77                 .reg_offset = 0,
78         },
79         [TPS65911_IRQ_HOTDIE] = {
80                 .mask = INT_MSK_HOTDIE_IT_MSK_MASK,
81                 .reg_offset = 0,
82         },
83         [TPS65911_IRQ_RTC_ALARM] = {
84                 .mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
85                 .reg_offset = 0,
86         },
87         [TPS65911_IRQ_RTC_PERIOD] = {
88                 .mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
89                 .reg_offset = 0,
90         },
91
92         /* INT_STS2 */
93         [TPS65911_IRQ_GPIO0_R] = {
94                 .mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
95                 .reg_offset = 1,
96         },
97         [TPS65911_IRQ_GPIO0_F] = {
98                 .mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
99                 .reg_offset = 1,
100         },
101         [TPS65911_IRQ_GPIO1_R] = {
102                 .mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
103                 .reg_offset = 1,
104         },
105         [TPS65911_IRQ_GPIO1_F] = {
106                 .mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
107                 .reg_offset = 1,
108         },
109         [TPS65911_IRQ_GPIO2_R] = {
110                 .mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
111                 .reg_offset = 1,
112         },
113         [TPS65911_IRQ_GPIO2_F] = {
114                 .mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
115                 .reg_offset = 1,
116         },
117         [TPS65911_IRQ_GPIO3_R] = {
118                 .mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
119                 .reg_offset = 1,
120         },
121         [TPS65911_IRQ_GPIO3_F] = {
122                 .mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
123                 .reg_offset = 1,
124         },
125
126         /* INT_STS2 */
127         [TPS65911_IRQ_GPIO4_R] = {
128                 .mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
129                 .reg_offset = 2,
130         },
131         [TPS65911_IRQ_GPIO4_F] = {
132                 .mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
133                 .reg_offset = 2,
134         },
135         [TPS65911_IRQ_GPIO5_R] = {
136                 .mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
137                 .reg_offset = 2,
138         },
139         [TPS65911_IRQ_GPIO5_F] = {
140                 .mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
141                 .reg_offset = 2,
142         },
143         [TPS65911_IRQ_WTCHDG] = {
144                 .mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
145                 .reg_offset = 2,
146         },
147         [TPS65911_IRQ_VMBCH2_H] = {
148                 .mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
149                 .reg_offset = 2,
150         },
151         [TPS65911_IRQ_VMBCH2_L] = {
152                 .mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
153                 .reg_offset = 2,
154         },
155         [TPS65911_IRQ_PWRDN] = {
156                 .mask = INT_MSK3_PWRDN_IT_MSK_MASK,
157                 .reg_offset = 2,
158         },
159 };
160
161 static const struct regmap_irq tps65910_irqs[] = {
162         /* INT_STS */
163         [TPS65910_IRQ_VBAT_VMBDCH] = {
164                 .mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
165                 .reg_offset = 0,
166         },
167         [TPS65910_IRQ_VBAT_VMHI] = {
168                 .mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
169                 .reg_offset = 0,
170         },
171         [TPS65910_IRQ_PWRON] = {
172                 .mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
173                 .reg_offset = 0,
174         },
175         [TPS65910_IRQ_PWRON_LP] = {
176                 .mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
177                 .reg_offset = 0,
178         },
179         [TPS65910_IRQ_PWRHOLD] = {
180                 .mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
181                 .reg_offset = 0,
182         },
183         [TPS65910_IRQ_HOTDIE] = {
184                 .mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
185                 .reg_offset = 0,
186         },
187         [TPS65910_IRQ_RTC_ALARM] = {
188                 .mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
189                 .reg_offset = 0,
190         },
191         [TPS65910_IRQ_RTC_PERIOD] = {
192                 .mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
193                 .reg_offset = 0,
194         },
195
196         /* INT_STS2 */
197         [TPS65910_IRQ_GPIO_R] = {
198                 .mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
199                 .reg_offset = 1,
200         },
201         [TPS65910_IRQ_GPIO_F] = {
202                 .mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
203                 .reg_offset = 1,
204         },
205 };
206
207 static struct regmap_irq_chip tps65911_irq_chip = {
208         .name = "tps65910",
209         .irqs = tps65911_irqs,
210         .num_irqs = ARRAY_SIZE(tps65911_irqs),
211         .num_regs = 3,
212         .irq_reg_stride = 2,
213         .status_base = TPS65910_INT_STS,
214         .mask_base = TPS65910_INT_MSK,
215         .ack_base = TPS65910_INT_STS,
216 };
217
218 static struct regmap_irq_chip tps65910_irq_chip = {
219         .name = "tps65910",
220         .irqs = tps65910_irqs,
221         .num_irqs = ARRAY_SIZE(tps65910_irqs),
222         .num_regs = 2,
223         .irq_reg_stride = 2,
224         .status_base = TPS65910_INT_STS,
225         .mask_base = TPS65910_INT_MSK,
226         .ack_base = TPS65910_INT_STS,
227 };
228
229 static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
230                     struct tps65910_platform_data *pdata)
231 {
232         int ret = 0;
233         static struct regmap_irq_chip *tps6591x_irqs_chip;
234
235         if (!irq) {
236                 dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
237                 return -EINVAL;
238         }
239
240         if (!pdata) {
241                 dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
242                 return -EINVAL;
243         }
244
245         switch (tps65910_chip_id(tps65910)) {
246         case TPS65910:
247                 tps6591x_irqs_chip = &tps65910_irq_chip;
248                 break;
249         case TPS65911:
250                 tps6591x_irqs_chip = &tps65911_irq_chip;
251                 break;
252         }
253
254         tps65910->chip_irq = irq;
255         ret = regmap_add_irq_chip(tps65910->regmap, tps65910->chip_irq,
256                 IRQF_ONESHOT, pdata->irq_base,
257                 tps6591x_irqs_chip, &tps65910->irq_data);
258         if (ret < 0)
259                 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
260         return ret;
261 }
262
263 static int tps65910_irq_exit(struct tps65910 *tps65910)
264 {
265         if (tps65910->chip_irq > 0)
266                 regmap_del_irq_chip(tps65910->chip_irq, tps65910->irq_data);
267         return 0;
268 }
269
270 static bool is_volatile_reg(struct device *dev, unsigned int reg)
271 {
272         struct tps65910 *tps65910 = dev_get_drvdata(dev);
273
274         /*
275          * Caching all regulator registers.
276          * All regualator register address range is same for
277          * TPS65910 and TPS65911
278          */
279         if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
280                 /* Check for non-existing register */
281                 if (tps65910_chip_id(tps65910) == TPS65910)
282                         if ((reg == TPS65911_VDDCTRL_OP) ||
283                                 (reg == TPS65911_VDDCTRL_SR))
284                                 return true;
285                 return false;
286         }
287         return true;
288 }
289
290 static const struct regmap_config tps65910_regmap_config = {
291         .reg_bits = 8,
292         .val_bits = 8,
293         .volatile_reg = is_volatile_reg,
294         .max_register = TPS65910_MAX_REGISTER - 1,
295         .cache_type = REGCACHE_RBTREE,
296 };
297
298 static int tps65910_ck32k_init(struct tps65910 *tps65910,
299                                         struct tps65910_board *pmic_pdata)
300 {
301         int ret;
302
303         if (!pmic_pdata->en_ck32k_xtal)
304                 return 0;
305
306         ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
307                                                 DEVCTRL_CK32K_CTRL_MASK);
308         if (ret < 0) {
309                 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
310                 return ret;
311         }
312
313         return 0;
314 }
315
316 static int tps65910_sleepinit(struct tps65910 *tps65910,
317                 struct tps65910_board *pmic_pdata)
318 {
319         struct device *dev = NULL;
320         int ret = 0;
321
322         dev = tps65910->dev;
323
324         if (!pmic_pdata->en_dev_slp)
325                 return 0;
326
327         /* enabling SLEEP device state */
328         ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
329                                 DEVCTRL_DEV_SLP_MASK);
330         if (ret < 0) {
331                 dev_err(dev, "set dev_slp failed: %d\n", ret);
332                 goto err_sleep_init;
333         }
334
335         /* Return if there is no sleep keepon data. */
336         if (!pmic_pdata->slp_keepon)
337                 return 0;
338
339         if (pmic_pdata->slp_keepon->therm_keepon) {
340                 ret = tps65910_reg_set_bits(tps65910,
341                                 TPS65910_SLEEP_KEEP_RES_ON,
342                                 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
343                 if (ret < 0) {
344                         dev_err(dev, "set therm_keepon failed: %d\n", ret);
345                         goto disable_dev_slp;
346                 }
347         }
348
349         if (pmic_pdata->slp_keepon->clkout32k_keepon) {
350                 ret = tps65910_reg_set_bits(tps65910,
351                                 TPS65910_SLEEP_KEEP_RES_ON,
352                                 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
353                 if (ret < 0) {
354                         dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
355                         goto disable_dev_slp;
356                 }
357         }
358
359         if (pmic_pdata->slp_keepon->i2chs_keepon) {
360                 ret = tps65910_reg_set_bits(tps65910,
361                                 TPS65910_SLEEP_KEEP_RES_ON,
362                                 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
363                 if (ret < 0) {
364                         dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
365                         goto disable_dev_slp;
366                 }
367         }
368
369         return 0;
370
371 disable_dev_slp:
372         tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
373                                 DEVCTRL_DEV_SLP_MASK);
374
375 err_sleep_init:
376         return ret;
377 }
378
379 #ifdef CONFIG_OF
380 static struct of_device_id tps65910_of_match[] = {
381         { .compatible = "ti,tps65910", .data = (void *)TPS65910},
382         { .compatible = "ti,tps65911", .data = (void *)TPS65911},
383         { },
384 };
385 MODULE_DEVICE_TABLE(of, tps65910_of_match);
386
387 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
388                                                 int *chip_id)
389 {
390         struct device_node *np = client->dev.of_node;
391         struct tps65910_board *board_info;
392         unsigned int prop;
393         const struct of_device_id *match;
394         int ret = 0;
395
396         match = of_match_device(tps65910_of_match, &client->dev);
397         if (!match) {
398                 dev_err(&client->dev, "Failed to find matching dt id\n");
399                 return NULL;
400         }
401
402         *chip_id  = (int)match->data;
403
404         board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
405                         GFP_KERNEL);
406         if (!board_info) {
407                 dev_err(&client->dev, "Failed to allocate pdata\n");
408                 return NULL;
409         }
410
411         ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
412         if (!ret)
413                 board_info->vmbch_threshold = prop;
414
415         ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
416         if (!ret)
417                 board_info->vmbch2_threshold = prop;
418
419         prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
420         board_info->en_ck32k_xtal = prop;
421
422         board_info->irq = client->irq;
423         board_info->irq_base = -1;
424         board_info->pm_off = of_property_read_bool(np,
425                         "ti,system-power-controller");
426
427         return board_info;
428 }
429 #else
430 static inline
431 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
432                                          int *chip_id)
433 {
434         return NULL;
435 }
436 #endif
437
438 static struct i2c_client *tps65910_i2c_client;
439 static void tps65910_power_off(void)
440 {
441         struct tps65910 *tps65910;
442
443         tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
444
445         if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
446                         DEVCTRL_PWR_OFF_MASK) < 0)
447                 return;
448
449         tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
450                         DEVCTRL_DEV_ON_MASK);
451 }
452
453 static int tps65910_i2c_probe(struct i2c_client *i2c,
454                                         const struct i2c_device_id *id)
455 {
456         struct tps65910 *tps65910;
457         struct tps65910_board *pmic_plat_data;
458         struct tps65910_board *of_pmic_plat_data = NULL;
459         struct tps65910_platform_data *init_data;
460         int ret = 0;
461         int chip_id = id->driver_data;
462
463         pmic_plat_data = dev_get_platdata(&i2c->dev);
464
465         if (!pmic_plat_data && i2c->dev.of_node) {
466                 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
467                 of_pmic_plat_data = pmic_plat_data;
468         }
469
470         if (!pmic_plat_data)
471                 return -EINVAL;
472
473         init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
474         if (init_data == NULL)
475                 return -ENOMEM;
476
477         tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
478         if (tps65910 == NULL)
479                 return -ENOMEM;
480
481         tps65910->of_plat_data = of_pmic_plat_data;
482         i2c_set_clientdata(i2c, tps65910);
483         tps65910->dev = &i2c->dev;
484         tps65910->i2c_client = i2c;
485         tps65910->id = chip_id;
486
487         tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
488         if (IS_ERR(tps65910->regmap)) {
489                 ret = PTR_ERR(tps65910->regmap);
490                 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
491                 return ret;
492         }
493
494         init_data->irq = pmic_plat_data->irq;
495         init_data->irq_base = pmic_plat_data->irq_base;
496
497         tps65910_irq_init(tps65910, init_data->irq, init_data);
498         tps65910_ck32k_init(tps65910, pmic_plat_data);
499         tps65910_sleepinit(tps65910, pmic_plat_data);
500
501         if (pmic_plat_data->pm_off && !pm_power_off) {
502                 tps65910_i2c_client = i2c;
503                 pm_power_off = tps65910_power_off;
504         }
505
506         ret = mfd_add_devices(tps65910->dev, -1,
507                               tps65910s, ARRAY_SIZE(tps65910s),
508                               NULL, 0,
509                               regmap_irq_get_domain(tps65910->irq_data));
510         if (ret < 0) {
511                 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
512                 return ret;
513         }
514
515         return ret;
516 }
517
518 static int tps65910_i2c_remove(struct i2c_client *i2c)
519 {
520         struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
521
522         tps65910_irq_exit(tps65910);
523         mfd_remove_devices(tps65910->dev);
524
525         return 0;
526 }
527
528 static const struct i2c_device_id tps65910_i2c_id[] = {
529        { "tps65910", TPS65910 },
530        { "tps65911", TPS65911 },
531        { }
532 };
533 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
534
535
536 static struct i2c_driver tps65910_i2c_driver = {
537         .driver = {
538                    .name = "tps65910",
539                    .owner = THIS_MODULE,
540                    .of_match_table = of_match_ptr(tps65910_of_match),
541         },
542         .probe = tps65910_i2c_probe,
543         .remove = tps65910_i2c_remove,
544         .id_table = tps65910_i2c_id,
545 };
546
547 static int __init tps65910_i2c_init(void)
548 {
549         return i2c_add_driver(&tps65910_i2c_driver);
550 }
551 /* init early so consumer devices can complete system boot */
552 subsys_initcall(tps65910_i2c_init);
553
554 static void __exit tps65910_i2c_exit(void)
555 {
556         i2c_del_driver(&tps65910_i2c_driver);
557 }
558 module_exit(tps65910_i2c_exit);
559
560 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
561 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
562 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
563 MODULE_LICENSE("GPL");