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Merge tag 'iwlwifi-next-for-kalle-2016-07-11' of git://git.kernel.org/pub/scm/linux...
[karo-tx-linux.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 = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap,
256                                        tps65910->chip_irq,
257                                        IRQF_ONESHOT, pdata->irq_base,
258                                        tps6591x_irqs_chip, &tps65910->irq_data);
259         if (ret < 0) {
260                 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
261                 tps65910->chip_irq = 0;
262         }
263         return ret;
264 }
265
266 static bool is_volatile_reg(struct device *dev, unsigned int reg)
267 {
268         struct tps65910 *tps65910 = dev_get_drvdata(dev);
269
270         /*
271          * Caching all regulator registers.
272          * All regualator register address range is same for
273          * TPS65910 and TPS65911
274          */
275         if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
276                 /* Check for non-existing register */
277                 if (tps65910_chip_id(tps65910) == TPS65910)
278                         if ((reg == TPS65911_VDDCTRL_OP) ||
279                                 (reg == TPS65911_VDDCTRL_SR))
280                                 return true;
281                 return false;
282         }
283         return true;
284 }
285
286 static const struct regmap_config tps65910_regmap_config = {
287         .reg_bits = 8,
288         .val_bits = 8,
289         .volatile_reg = is_volatile_reg,
290         .max_register = TPS65910_MAX_REGISTER - 1,
291         .cache_type = REGCACHE_RBTREE,
292 };
293
294 static int tps65910_ck32k_init(struct tps65910 *tps65910,
295                                         struct tps65910_board *pmic_pdata)
296 {
297         int ret;
298
299         if (!pmic_pdata->en_ck32k_xtal)
300                 return 0;
301
302         ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
303                                                 DEVCTRL_CK32K_CTRL_MASK);
304         if (ret < 0) {
305                 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
306                 return ret;
307         }
308
309         return 0;
310 }
311
312 static int tps65910_sleepinit(struct tps65910 *tps65910,
313                 struct tps65910_board *pmic_pdata)
314 {
315         struct device *dev = NULL;
316         int ret = 0;
317
318         dev = tps65910->dev;
319
320         if (!pmic_pdata->en_dev_slp)
321                 return 0;
322
323         /* enabling SLEEP device state */
324         ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
325                                 DEVCTRL_DEV_SLP_MASK);
326         if (ret < 0) {
327                 dev_err(dev, "set dev_slp failed: %d\n", ret);
328                 goto err_sleep_init;
329         }
330
331         /* Return if there is no sleep keepon data. */
332         if (!pmic_pdata->slp_keepon)
333                 return 0;
334
335         if (pmic_pdata->slp_keepon->therm_keepon) {
336                 ret = tps65910_reg_set_bits(tps65910,
337                                 TPS65910_SLEEP_KEEP_RES_ON,
338                                 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
339                 if (ret < 0) {
340                         dev_err(dev, "set therm_keepon failed: %d\n", ret);
341                         goto disable_dev_slp;
342                 }
343         }
344
345         if (pmic_pdata->slp_keepon->clkout32k_keepon) {
346                 ret = tps65910_reg_set_bits(tps65910,
347                                 TPS65910_SLEEP_KEEP_RES_ON,
348                                 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
349                 if (ret < 0) {
350                         dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
351                         goto disable_dev_slp;
352                 }
353         }
354
355         if (pmic_pdata->slp_keepon->i2chs_keepon) {
356                 ret = tps65910_reg_set_bits(tps65910,
357                                 TPS65910_SLEEP_KEEP_RES_ON,
358                                 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
359                 if (ret < 0) {
360                         dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
361                         goto disable_dev_slp;
362                 }
363         }
364
365         return 0;
366
367 disable_dev_slp:
368         tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
369                                 DEVCTRL_DEV_SLP_MASK);
370
371 err_sleep_init:
372         return ret;
373 }
374
375 #ifdef CONFIG_OF
376 static const struct of_device_id tps65910_of_match[] = {
377         { .compatible = "ti,tps65910", .data = (void *)TPS65910},
378         { .compatible = "ti,tps65911", .data = (void *)TPS65911},
379         { },
380 };
381 MODULE_DEVICE_TABLE(of, tps65910_of_match);
382
383 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
384                                                 unsigned long *chip_id)
385 {
386         struct device_node *np = client->dev.of_node;
387         struct tps65910_board *board_info;
388         unsigned int prop;
389         const struct of_device_id *match;
390         int ret = 0;
391
392         match = of_match_device(tps65910_of_match, &client->dev);
393         if (!match) {
394                 dev_err(&client->dev, "Failed to find matching dt id\n");
395                 return NULL;
396         }
397
398         *chip_id  = (unsigned long)match->data;
399
400         board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
401                         GFP_KERNEL);
402         if (!board_info) {
403                 dev_err(&client->dev, "Failed to allocate pdata\n");
404                 return NULL;
405         }
406
407         ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
408         if (!ret)
409                 board_info->vmbch_threshold = prop;
410
411         ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
412         if (!ret)
413                 board_info->vmbch2_threshold = prop;
414
415         prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
416         board_info->en_ck32k_xtal = prop;
417
418         board_info->irq = client->irq;
419         board_info->irq_base = -1;
420         board_info->pm_off = of_property_read_bool(np,
421                         "ti,system-power-controller");
422
423         return board_info;
424 }
425 #else
426 static inline
427 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
428                                          unsigned long *chip_id)
429 {
430         return NULL;
431 }
432 #endif
433
434 static struct i2c_client *tps65910_i2c_client;
435 static void tps65910_power_off(void)
436 {
437         struct tps65910 *tps65910;
438
439         tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
440
441         if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
442                         DEVCTRL_PWR_OFF_MASK) < 0)
443                 return;
444
445         tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
446                         DEVCTRL_DEV_ON_MASK);
447 }
448
449 static int tps65910_i2c_probe(struct i2c_client *i2c,
450                               const struct i2c_device_id *id)
451 {
452         struct tps65910 *tps65910;
453         struct tps65910_board *pmic_plat_data;
454         struct tps65910_board *of_pmic_plat_data = NULL;
455         struct tps65910_platform_data *init_data;
456         unsigned long chip_id = id->driver_data;
457         int ret = 0;
458
459         pmic_plat_data = dev_get_platdata(&i2c->dev);
460
461         if (!pmic_plat_data && i2c->dev.of_node) {
462                 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
463                 of_pmic_plat_data = pmic_plat_data;
464         }
465
466         if (!pmic_plat_data)
467                 return -EINVAL;
468
469         init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
470         if (init_data == NULL)
471                 return -ENOMEM;
472
473         tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
474         if (tps65910 == NULL)
475                 return -ENOMEM;
476
477         tps65910->of_plat_data = of_pmic_plat_data;
478         i2c_set_clientdata(i2c, tps65910);
479         tps65910->dev = &i2c->dev;
480         tps65910->i2c_client = i2c;
481         tps65910->id = chip_id;
482
483         /* Work around silicon erratum SWCZ010: the tps65910 may miss the
484          * first I2C transfer. So issue a dummy transfer before the first
485          * real transfer.
486          */
487         i2c_master_send(i2c, "", 1);
488         tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
489         if (IS_ERR(tps65910->regmap)) {
490                 ret = PTR_ERR(tps65910->regmap);
491                 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
492                 return ret;
493         }
494
495         init_data->irq = pmic_plat_data->irq;
496         init_data->irq_base = pmic_plat_data->irq_base;
497
498         tps65910_irq_init(tps65910, init_data->irq, init_data);
499         tps65910_ck32k_init(tps65910, pmic_plat_data);
500         tps65910_sleepinit(tps65910, pmic_plat_data);
501
502         if (pmic_plat_data->pm_off && !pm_power_off) {
503                 tps65910_i2c_client = i2c;
504                 pm_power_off = tps65910_power_off;
505         }
506
507         ret = devm_mfd_add_devices(tps65910->dev, -1,
508                                    tps65910s, ARRAY_SIZE(tps65910s),
509                                    NULL, 0,
510                                    regmap_irq_get_domain(tps65910->irq_data));
511         if (ret < 0) {
512                 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
513                 return ret;
514         }
515
516         return ret;
517 }
518
519 static const struct i2c_device_id tps65910_i2c_id[] = {
520        { "tps65910", TPS65910 },
521        { "tps65911", TPS65911 },
522        { }
523 };
524 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
525
526
527 static struct i2c_driver tps65910_i2c_driver = {
528         .driver = {
529                    .name = "tps65910",
530                    .of_match_table = of_match_ptr(tps65910_of_match),
531         },
532         .probe = tps65910_i2c_probe,
533         .id_table = tps65910_i2c_id,
534 };
535
536 static int __init tps65910_i2c_init(void)
537 {
538         return i2c_add_driver(&tps65910_i2c_driver);
539 }
540 /* init early so consumer devices can complete system boot */
541 subsys_initcall(tps65910_i2c_init);
542
543 static void __exit tps65910_i2c_exit(void)
544 {
545         i2c_del_driver(&tps65910_i2c_driver);
546 }
547 module_exit(tps65910_i2c_exit);
548
549 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
550 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
551 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
552 MODULE_LICENSE("GPL");