Merge branch 'printk-rework' into for-linus
[linux-2.6-microblaze.git] / drivers / mfd / tps65010.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * tps65010 - driver for tps6501x power management chips
4  *
5  * Copyright (C) 2004 Texas Instruments
6  * Copyright (C) 2004-2005 David Brownell
7  */
8
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <linux/interrupt.h>
14 #include <linux/i2c.h>
15 #include <linux/delay.h>
16 #include <linux/workqueue.h>
17 #include <linux/debugfs.h>
18 #include <linux/seq_file.h>
19 #include <linux/mutex.h>
20 #include <linux/platform_device.h>
21
22 #include <linux/mfd/tps65010.h>
23
24 #include <linux/gpio/driver.h>
25
26
27 /*-------------------------------------------------------------------------*/
28
29 #define DRIVER_VERSION  "2 May 2005"
30 #define DRIVER_NAME     (tps65010_driver.driver.name)
31
32 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
33 MODULE_LICENSE("GPL");
34
35 static struct i2c_driver tps65010_driver;
36
37 /*-------------------------------------------------------------------------*/
38
39 /* This driver handles a family of multipurpose chips, which incorporate
40  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
41  * and other features often needed in portable devices like cell phones
42  * or digital cameras.
43  *
44  * The tps65011 and tps65013 have different voltage settings compared
45  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
46  * All except tps65010 have "wait" mode, possibly defaulted so that
47  * battery-insert != device-on.
48  *
49  * We could distinguish between some models by checking VDCDC1.UVLO or
50  * other registers, unless they've been changed already after powerup
51  * as part of board setup by a bootloader.
52  */
53 enum tps_model {
54         TPS65010,
55         TPS65011,
56         TPS65012,
57         TPS65013,
58 };
59
60 struct tps65010 {
61         struct i2c_client       *client;
62         struct mutex            lock;
63         struct delayed_work     work;
64         struct dentry           *file;
65         unsigned                charging:1;
66         unsigned                por:1;
67         unsigned                model:8;
68         u16                     vbus;
69         unsigned long           flags;
70 #define FLAG_VBUS_CHANGED       0
71 #define FLAG_IRQ_ENABLE         1
72
73         /* copies of last register state */
74         u8                      chgstatus, regstatus, chgconf;
75         u8                      nmask1, nmask2;
76
77         u8                      outmask;
78         struct gpio_chip        chip;
79         struct platform_device  *leds;
80 };
81
82 #define POWER_POLL_DELAY        msecs_to_jiffies(5000)
83
84 /*-------------------------------------------------------------------------*/
85
86 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
87
88 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
89 {
90         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
91                 chgstatus,
92                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
93                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
94                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
95                 (chgstatus & TPS_CHG_TERM) ? " done" :
96                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
97                                 ? " (charging)" : ""),
98                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
99                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
100                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
101                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
102 }
103
104 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
105 {
106         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
107                 regstatus,
108                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
109                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
110                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
111                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
112                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
113                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
114                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
115                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
116 }
117
118 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
119 {
120         const char *hibit;
121
122         if (por)
123                 hibit = (chgconfig & TPS_CHARGE_POR)
124                                 ? "POR=69ms" : "POR=1sec";
125         else
126                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
127
128         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
129                 chgconfig, hibit,
130                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
131                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
132                 ({int p; switch ((chgconfig >> 3) & 3) {
133                 case 3:         p = 100; break;
134                 case 2:         p = 75; break;
135                 case 1:         p = 50; break;
136                 default:        p = 25; break;
137                 }; p; }),
138                 (chgconfig & TPS_VBUS_CHARGING)
139                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
140                         : 0,
141                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
142 }
143
144 #endif
145
146 #ifdef  DEBUG
147
148 static void show_chgstatus(const char *label, u8 chgstatus)
149 {
150         char buf [100];
151
152         dbg_chgstat(buf, sizeof buf, chgstatus);
153         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
154 }
155
156 static void show_regstatus(const char *label, u8 regstatus)
157 {
158         char buf [100];
159
160         dbg_regstat(buf, sizeof buf, regstatus);
161         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
162 }
163
164 static void show_chgconfig(int por, const char *label, u8 chgconfig)
165 {
166         char buf [100];
167
168         dbg_chgconf(por, buf, sizeof buf, chgconfig);
169         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
170 }
171
172 #else
173
174 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
175 static inline void show_regstatus(const char *label, u8 chgstatus) { }
176 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
177
178 #endif
179
180 #ifdef  CONFIG_DEBUG_FS
181
182 static int dbg_show(struct seq_file *s, void *_)
183 {
184         struct tps65010 *tps = s->private;
185         u8              value, v2;
186         unsigned        i;
187         char            buf[100];
188         const char      *chip;
189
190         switch (tps->model) {
191         case TPS65010:  chip = "tps65010"; break;
192         case TPS65011:  chip = "tps65011"; break;
193         case TPS65012:  chip = "tps65012"; break;
194         case TPS65013:  chip = "tps65013"; break;
195         default:        chip = NULL; break;
196         }
197         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
198                         DRIVER_NAME, DRIVER_VERSION, chip);
199
200         mutex_lock(&tps->lock);
201
202         /* FIXME how can we tell whether a battery is present?
203          * likely involves a charge gauging chip (like BQ26501).
204          */
205
206         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
207
208
209         /* registers for monitoring battery charging and status; note
210          * that reading chgstat and regstat may ack IRQs...
211          */
212         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
213         dbg_chgconf(tps->por, buf, sizeof buf, value);
214         seq_printf(s, "chgconfig %s", buf);
215
216         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
217         dbg_chgstat(buf, sizeof buf, value);
218         seq_printf(s, "chgstat   %s", buf);
219         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
220         dbg_chgstat(buf, sizeof buf, value);
221         seq_printf(s, "mask1     %s", buf);
222         /* ignore ackint1 */
223
224         value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
225         dbg_regstat(buf, sizeof buf, value);
226         seq_printf(s, "regstat   %s", buf);
227         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
228         dbg_regstat(buf, sizeof buf, value);
229         seq_printf(s, "mask2     %s\n", buf);
230         /* ignore ackint2 */
231
232         queue_delayed_work(system_power_efficient_wq, &tps->work,
233                            POWER_POLL_DELAY);
234
235         /* VMAIN voltage, enable lowpower, etc */
236         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
237         seq_printf(s, "vdcdc1    %02x\n", value);
238
239         /* VCORE voltage, vibrator on/off */
240         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
241         seq_printf(s, "vdcdc2    %02x\n", value);
242
243         /* both LD0s, and their lowpower behavior */
244         value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
245         seq_printf(s, "vregs1    %02x\n\n", value);
246
247
248         /* LEDs and GPIOs */
249         value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
250         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
251         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
252                 (value & 0x80)
253                         ? ((v2 & 0x80) ? "on" : "off")
254                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
255                 value, v2,
256                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
257
258         value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
259         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
260         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
261                 (value & 0x80)
262                         ? ((v2 & 0x80) ? "on" : "off")
263                         : ((v2 & 0x80) ? "blink" : "off"),
264                 value, v2,
265                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
266
267         value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
268         v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
269         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
270
271         for (i = 0; i < 4; i++) {
272                 if (value & (1 << (4 + i)))
273                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
274                                 (value & (1 << i)) ? "low" : "hi ");
275                 else
276                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
277                                 (value & (1 << i)) ? "hi " : "low",
278                                 (v2 & (1 << i)) ? "no-irq" : "irq",
279                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
280         }
281
282         mutex_unlock(&tps->lock);
283         return 0;
284 }
285
286 static int dbg_tps_open(struct inode *inode, struct file *file)
287 {
288         return single_open(file, dbg_show, inode->i_private);
289 }
290
291 static const struct file_operations debug_fops = {
292         .open           = dbg_tps_open,
293         .read           = seq_read,
294         .llseek         = seq_lseek,
295         .release        = single_release,
296 };
297
298 #define DEBUG_FOPS      &debug_fops
299
300 #else
301 #define DEBUG_FOPS      NULL
302 #endif
303
304 /*-------------------------------------------------------------------------*/
305
306 /* handle IRQS in a task context, so we can use I2C calls */
307 static void tps65010_interrupt(struct tps65010 *tps)
308 {
309         u8 tmp = 0, mask, poll;
310
311         /* IRQs won't trigger for certain events, but we can get
312          * others by polling (normally, with external power applied).
313          */
314         poll = 0;
315
316         /* regstatus irqs */
317         if (tps->nmask2) {
318                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
319                 mask = tmp ^ tps->regstatus;
320                 tps->regstatus = tmp;
321                 mask &= tps->nmask2;
322         } else
323                 mask = 0;
324         if (mask) {
325                 tps->regstatus =  tmp;
326                 /* may need to shut something down ... */
327
328                 /* "off" usually means deep sleep */
329                 if (tmp & TPS_REG_ONOFF) {
330                         pr_info("%s: power off button\n", DRIVER_NAME);
331 #if 0
332                         /* REVISIT:  this might need its own workqueue
333                          * plus tweaks including deadlock avoidance ...
334                          * also needs to get error handling and probably
335                          * an #ifdef CONFIG_HIBERNATION
336                          */
337                         hibernate();
338 #endif
339                         poll = 1;
340                 }
341         }
342
343         /* chgstatus irqs */
344         if (tps->nmask1) {
345                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
346                 mask = tmp ^ tps->chgstatus;
347                 tps->chgstatus = tmp;
348                 mask &= tps->nmask1;
349         } else
350                 mask = 0;
351         if (mask) {
352                 unsigned        charging = 0;
353
354                 show_chgstatus("chg/irq", tmp);
355                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
356                         show_chgconfig(tps->por, "conf", tps->chgconf);
357
358                 /* Unless it was turned off or disabled, we charge any
359                  * battery whenever there's power available for it
360                  * and the charger hasn't been disabled.
361                  */
362                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
363                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
364                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
365                                 ) {
366                         if (tps->chgstatus & TPS_CHG_USB) {
367                                 /* VBUS options are readonly until reconnect */
368                                 if (mask & TPS_CHG_USB)
369                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
370                                 charging = 1;
371                         } else if (tps->chgstatus & TPS_CHG_AC)
372                                 charging = 1;
373                 }
374                 if (charging != tps->charging) {
375                         tps->charging = charging;
376                         pr_info("%s: battery %scharging\n",
377                                 DRIVER_NAME, charging ? "" :
378                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
379                                         ? "NOT " : "dis"));
380                 }
381         }
382
383         /* always poll to detect (a) power removal, without tps65013
384          * NO_CHG IRQ; or (b) restart of charging after stop.
385          */
386         if ((tps->model != TPS65013 || !tps->charging)
387                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
388                 poll = 1;
389         if (poll)
390                 queue_delayed_work(system_power_efficient_wq, &tps->work,
391                                    POWER_POLL_DELAY);
392
393         /* also potentially gpio-in rise or fall */
394 }
395
396 /* handle IRQs and polling using keventd for now */
397 static void tps65010_work(struct work_struct *work)
398 {
399         struct tps65010         *tps;
400
401         tps = container_of(to_delayed_work(work), struct tps65010, work);
402         mutex_lock(&tps->lock);
403
404         tps65010_interrupt(tps);
405
406         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
407                 u8      chgconfig, tmp;
408
409                 chgconfig = i2c_smbus_read_byte_data(tps->client,
410                                         TPS_CHGCONFIG);
411                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
412                 if (tps->vbus == 500)
413                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
414                 else if (tps->vbus >= 100)
415                         chgconfig |= TPS_VBUS_CHARGING;
416
417                 i2c_smbus_write_byte_data(tps->client,
418                                           TPS_CHGCONFIG, chgconfig);
419
420                 /* vbus update fails unless VBUS is connected! */
421                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
422                 tps->chgconf = tmp;
423                 show_chgconfig(tps->por, "update vbus", tmp);
424         }
425
426         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
427                 enable_irq(tps->client->irq);
428
429         mutex_unlock(&tps->lock);
430 }
431
432 static irqreturn_t tps65010_irq(int irq, void *_tps)
433 {
434         struct tps65010         *tps = _tps;
435
436         disable_irq_nosync(irq);
437         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
438         queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
439         return IRQ_HANDLED;
440 }
441
442 /*-------------------------------------------------------------------------*/
443
444 /* offsets 0..3 == GPIO1..GPIO4
445  * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
446  * offset 6 == vibrator motor driver
447  */
448 static void
449 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
450 {
451         if (offset < 4)
452                 tps65010_set_gpio_out_value(offset + 1, value);
453         else if (offset < 6)
454                 tps65010_set_led(offset - 3, value ? ON : OFF);
455         else
456                 tps65010_set_vib(value);
457 }
458
459 static int
460 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
461 {
462         /* GPIOs may be input-only */
463         if (offset < 4) {
464                 struct tps65010         *tps;
465
466                 tps = gpiochip_get_data(chip);
467                 if (!(tps->outmask & (1 << offset)))
468                         return -EINVAL;
469                 tps65010_set_gpio_out_value(offset + 1, value);
470         } else if (offset < 6)
471                 tps65010_set_led(offset - 3, value ? ON : OFF);
472         else
473                 tps65010_set_vib(value);
474
475         return 0;
476 }
477
478 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
479 {
480         int                     value;
481         struct tps65010         *tps;
482
483         tps = gpiochip_get_data(chip);
484
485         if (offset < 4) {
486                 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
487                 if (value < 0)
488                         return value;
489                 if (value & (1 << (offset + 4)))        /* output */
490                         return !(value & (1 << offset));
491                 else                                    /* input */
492                         return !!(value & (1 << offset));
493         }
494
495         /* REVISIT we *could* report LED1/nPG and LED2 state ... */
496         return 0;
497 }
498
499
500 /*-------------------------------------------------------------------------*/
501
502 static struct tps65010 *the_tps;
503
504 static int tps65010_remove(struct i2c_client *client)
505 {
506         struct tps65010         *tps = i2c_get_clientdata(client);
507         struct tps65010_board   *board = dev_get_platdata(&client->dev);
508
509         if (board && board->teardown) {
510                 int status = board->teardown(client, board->context);
511                 if (status < 0)
512                         dev_dbg(&client->dev, "board %s %s err %d\n",
513                                 "teardown", client->name, status);
514         }
515         if (client->irq > 0)
516                 free_irq(client->irq, tps);
517         cancel_delayed_work_sync(&tps->work);
518         debugfs_remove(tps->file);
519         the_tps = NULL;
520         return 0;
521 }
522
523 static int tps65010_probe(struct i2c_client *client,
524                           const struct i2c_device_id *id)
525 {
526         struct tps65010         *tps;
527         int                     status;
528         struct tps65010_board   *board = dev_get_platdata(&client->dev);
529
530         if (the_tps) {
531                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
532                 return -ENODEV;
533         }
534
535         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
536                 return -EINVAL;
537
538         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
539         if (!tps)
540                 return -ENOMEM;
541
542         mutex_init(&tps->lock);
543         INIT_DELAYED_WORK(&tps->work, tps65010_work);
544         tps->client = client;
545         tps->model = id->driver_data;
546
547         /* the IRQ is active low, but many gpio lines can't support that
548          * so this driver uses falling-edge triggers instead.
549          */
550         if (client->irq > 0) {
551                 status = request_irq(client->irq, tps65010_irq,
552                                      IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
553                 if (status < 0) {
554                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
555                                         client->irq, status);
556                         return status;
557                 }
558                 /* annoying race here, ideally we'd have an option
559                  * to claim the irq now and enable it later.
560                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
561                  */
562                 disable_irq(client->irq);
563                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
564         } else
565                 dev_warn(&client->dev, "IRQ not configured!\n");
566
567
568         switch (tps->model) {
569         case TPS65010:
570         case TPS65012:
571                 tps->por = 1;
572                 break;
573         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
574         }
575         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
576         show_chgconfig(tps->por, "conf/init", tps->chgconf);
577
578         show_chgstatus("chg/init",
579                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
580         show_regstatus("reg/init",
581                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
582
583         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
584                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
585                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
586                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
587         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
588                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
589                 i2c_smbus_read_byte_data(client, TPS_MASK3));
590
591         i2c_set_clientdata(client, tps);
592         the_tps = tps;
593
594 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
595         /* USB hosts can't draw VBUS.  OTG devices could, later
596          * when OTG infrastructure enables it.  USB peripherals
597          * could be relying on VBUS while booting, though.
598          */
599         tps->vbus = 100;
600 #endif
601
602         /* unmask the "interesting" irqs, then poll once to
603          * kickstart monitoring, initialize shadowed status
604          * registers, and maybe disable VBUS draw.
605          */
606         tps->nmask1 = ~0;
607         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
608
609         tps->nmask2 = TPS_REG_ONOFF;
610         if (tps->model == TPS65013)
611                 tps->nmask2 |= TPS_REG_NO_CHG;
612         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
613
614         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
615                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
616
617         tps65010_work(&tps->work.work);
618
619         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
620                                 tps, DEBUG_FOPS);
621
622         /* optionally register GPIOs */
623         if (board && board->base != 0) {
624                 tps->outmask = board->outmask;
625
626                 tps->chip.label = client->name;
627                 tps->chip.parent = &client->dev;
628                 tps->chip.owner = THIS_MODULE;
629
630                 tps->chip.set = tps65010_gpio_set;
631                 tps->chip.direction_output = tps65010_output;
632
633                 /* NOTE:  only partial support for inputs; nyet IRQs */
634                 tps->chip.get = tps65010_gpio_get;
635
636                 tps->chip.base = board->base;
637                 tps->chip.ngpio = 7;
638                 tps->chip.can_sleep = 1;
639
640                 status = gpiochip_add_data(&tps->chip, tps);
641                 if (status < 0)
642                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
643                                         status);
644                 else if (board->setup) {
645                         status = board->setup(client, board->context);
646                         if (status < 0) {
647                                 dev_dbg(&client->dev,
648                                         "board %s %s err %d\n",
649                                         "setup", client->name, status);
650                                 status = 0;
651                         }
652                 }
653         }
654
655         return 0;
656 }
657
658 static const struct i2c_device_id tps65010_id[] = {
659         { "tps65010", TPS65010 },
660         { "tps65011", TPS65011 },
661         { "tps65012", TPS65012 },
662         { "tps65013", TPS65013 },
663         { "tps65014", TPS65011 },       /* tps65011 charging at 6.5V max */
664         { }
665 };
666 MODULE_DEVICE_TABLE(i2c, tps65010_id);
667
668 static struct i2c_driver tps65010_driver = {
669         .driver = {
670                 .name   = "tps65010",
671         },
672         .probe  = tps65010_probe,
673         .remove = tps65010_remove,
674         .id_table = tps65010_id,
675 };
676
677 /*-------------------------------------------------------------------------*/
678
679 /* Draw from VBUS:
680  *   0 mA -- DON'T DRAW (might supply power instead)
681  * 100 mA -- usb unit load (slowest charge rate)
682  * 500 mA -- usb high power (fast battery charge)
683  */
684 int tps65010_set_vbus_draw(unsigned mA)
685 {
686         unsigned long   flags;
687
688         if (!the_tps)
689                 return -ENODEV;
690
691         /* assumes non-SMP */
692         local_irq_save(flags);
693         if (mA >= 500)
694                 mA = 500;
695         else if (mA >= 100)
696                 mA = 100;
697         else
698                 mA = 0;
699         the_tps->vbus = mA;
700         if ((the_tps->chgstatus & TPS_CHG_USB)
701                         && test_and_set_bit(
702                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
703                 /* gadget drivers call this in_irq() */
704                 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
705                                    0);
706         }
707         local_irq_restore(flags);
708
709         return 0;
710 }
711 EXPORT_SYMBOL(tps65010_set_vbus_draw);
712
713 /*-------------------------------------------------------------------------*/
714 /* tps65010_set_gpio_out_value parameter:
715  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
716  * value: LOW or HIGH
717  */
718 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
719 {
720         int      status;
721         unsigned defgpio;
722
723         if (!the_tps)
724                 return -ENODEV;
725         if ((gpio < GPIO1) || (gpio > GPIO4))
726                 return -EINVAL;
727
728         mutex_lock(&the_tps->lock);
729
730         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
731
732         /* Configure GPIO for output */
733         defgpio |= 1 << (gpio + 3);
734
735         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
736         switch (value) {
737         case LOW:
738                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
739                 break;
740         /* case HIGH: */
741         default:
742                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
743                 break;
744         }
745
746         status = i2c_smbus_write_byte_data(the_tps->client,
747                 TPS_DEFGPIO, defgpio);
748
749         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
750                 gpio, value ? "high" : "low",
751                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
752
753         mutex_unlock(&the_tps->lock);
754         return status;
755 }
756 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
757
758 /*-------------------------------------------------------------------------*/
759 /* tps65010_set_led parameter:
760  * led:  LED1 or LED2
761  * mode: ON, OFF or BLINK
762  */
763 int tps65010_set_led(unsigned led, unsigned mode)
764 {
765         int      status;
766         unsigned led_on, led_per, offs;
767
768         if (!the_tps)
769                 return -ENODEV;
770
771         if (led == LED1)
772                 offs = 0;
773         else {
774                 offs = 2;
775                 led = LED2;
776         }
777
778         mutex_lock(&the_tps->lock);
779
780         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
781                 i2c_smbus_read_byte_data(the_tps->client,
782                                 TPS_LED1_ON + offs));
783
784         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
785                 i2c_smbus_read_byte_data(the_tps->client,
786                                 TPS_LED1_PER + offs));
787
788         switch (mode) {
789         case OFF:
790                 led_on  = 1 << 7;
791                 led_per = 0 << 7;
792                 break;
793         case ON:
794                 led_on  = 1 << 7;
795                 led_per = 1 << 7;
796                 break;
797         case BLINK:
798                 led_on  = 0x30 | (0 << 7);
799                 led_per = 0x08 | (1 << 7);
800                 break;
801         default:
802                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
803                        DRIVER_NAME);
804                 mutex_unlock(&the_tps->lock);
805                 return -EINVAL;
806         }
807
808         status = i2c_smbus_write_byte_data(the_tps->client,
809                         TPS_LED1_ON + offs, led_on);
810
811         if (status != 0) {
812                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
813                        DRIVER_NAME, led);
814                 mutex_unlock(&the_tps->lock);
815                 return status;
816         }
817
818         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
819                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
820
821         status = i2c_smbus_write_byte_data(the_tps->client,
822                         TPS_LED1_PER + offs, led_per);
823
824         if (status != 0) {
825                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
826                        DRIVER_NAME, led);
827                 mutex_unlock(&the_tps->lock);
828                 return status;
829         }
830
831         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
832                 i2c_smbus_read_byte_data(the_tps->client,
833                                 TPS_LED1_PER + offs));
834
835         mutex_unlock(&the_tps->lock);
836
837         return status;
838 }
839 EXPORT_SYMBOL(tps65010_set_led);
840
841 /*-------------------------------------------------------------------------*/
842 /* tps65010_set_vib parameter:
843  * value: ON or OFF
844  */
845 int tps65010_set_vib(unsigned value)
846 {
847         int      status;
848         unsigned vdcdc2;
849
850         if (!the_tps)
851                 return -ENODEV;
852
853         mutex_lock(&the_tps->lock);
854
855         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
856         vdcdc2 &= ~(1 << 1);
857         if (value)
858                 vdcdc2 |= (1 << 1);
859         status = i2c_smbus_write_byte_data(the_tps->client,
860                 TPS_VDCDC2, vdcdc2);
861
862         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
863
864         mutex_unlock(&the_tps->lock);
865         return status;
866 }
867 EXPORT_SYMBOL(tps65010_set_vib);
868
869 /*-------------------------------------------------------------------------*/
870 /* tps65010_set_low_pwr parameter:
871  * mode: ON or OFF
872  */
873 int tps65010_set_low_pwr(unsigned mode)
874 {
875         int      status;
876         unsigned vdcdc1;
877
878         if (!the_tps)
879                 return -ENODEV;
880
881         mutex_lock(&the_tps->lock);
882
883         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
884                 mode ? "enable" : "disable",
885                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
886
887         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
888
889         switch (mode) {
890         case OFF:
891                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
892                 break;
893         /* case ON: */
894         default:
895                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
896                 break;
897         }
898
899         status = i2c_smbus_write_byte_data(the_tps->client,
900                         TPS_VDCDC1, vdcdc1);
901
902         if (status != 0)
903                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
904                         DRIVER_NAME);
905         else
906                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
907                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
908
909         mutex_unlock(&the_tps->lock);
910
911         return status;
912 }
913 EXPORT_SYMBOL(tps65010_set_low_pwr);
914
915 /*-------------------------------------------------------------------------*/
916 /* tps65010_config_vregs1 parameter:
917  * value to be written to VREGS1 register
918  * Note: The complete register is written, set all bits you need
919  */
920 int tps65010_config_vregs1(unsigned value)
921 {
922         int      status;
923
924         if (!the_tps)
925                 return -ENODEV;
926
927         mutex_lock(&the_tps->lock);
928
929         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
930                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
931
932         status = i2c_smbus_write_byte_data(the_tps->client,
933                         TPS_VREGS1, value);
934
935         if (status != 0)
936                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
937                         DRIVER_NAME);
938         else
939                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
940                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
941
942         mutex_unlock(&the_tps->lock);
943
944         return status;
945 }
946 EXPORT_SYMBOL(tps65010_config_vregs1);
947
948 int tps65010_config_vdcdc2(unsigned value)
949 {
950         struct i2c_client *c;
951         int      status;
952
953         if (!the_tps)
954                 return -ENODEV;
955
956         c = the_tps->client;
957         mutex_lock(&the_tps->lock);
958
959         pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
960                  i2c_smbus_read_byte_data(c, TPS_VDCDC2));
961
962         status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
963
964         if (status != 0)
965                 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
966                         DRIVER_NAME);
967         else
968                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
969                          i2c_smbus_read_byte_data(c, TPS_VDCDC2));
970
971         mutex_unlock(&the_tps->lock);
972         return status;
973 }
974 EXPORT_SYMBOL(tps65010_config_vdcdc2);
975
976 /*-------------------------------------------------------------------------*/
977 /* tps65013_set_low_pwr parameter:
978  * mode: ON or OFF
979  */
980
981 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
982         required if power supply is through a battery */
983
984 int tps65013_set_low_pwr(unsigned mode)
985 {
986         int      status;
987         unsigned vdcdc1, chgconfig;
988
989         if (!the_tps || the_tps->por)
990                 return -ENODEV;
991
992         mutex_lock(&the_tps->lock);
993
994         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
995                 DRIVER_NAME,
996                 mode ? "enable" : "disable",
997                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
998                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
999
1000         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1001         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1002
1003         switch (mode) {
1004         case OFF:
1005                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1006                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1007                 break;
1008         /* case ON: */
1009         default:
1010                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1011                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1012                 break;
1013         }
1014
1015         status = i2c_smbus_write_byte_data(the_tps->client,
1016                         TPS_CHGCONFIG, chgconfig);
1017         if (status != 0) {
1018                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1019          DRIVER_NAME);
1020                 mutex_unlock(&the_tps->lock);
1021                 return status;
1022         }
1023
1024         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1025         the_tps->chgconf = chgconfig;
1026         show_chgconfig(0, "chgconf", chgconfig);
1027
1028         status = i2c_smbus_write_byte_data(the_tps->client,
1029                         TPS_VDCDC1, vdcdc1);
1030
1031         if (status != 0)
1032                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1033          DRIVER_NAME);
1034         else
1035                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1036                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1037
1038         mutex_unlock(&the_tps->lock);
1039
1040         return status;
1041 }
1042 EXPORT_SYMBOL(tps65013_set_low_pwr);
1043
1044 /*-------------------------------------------------------------------------*/
1045
1046 static int __init tps_init(void)
1047 {
1048         return i2c_add_driver(&tps65010_driver);
1049 }
1050 /* NOTE:  this MUST be initialized before the other parts of the system
1051  * that rely on it ... but after the i2c bus on which this relies.
1052  * That is, much earlier than on PC-type systems, which don't often use
1053  * I2C as a core system bus.
1054  */
1055 subsys_initcall(tps_init);
1056
1057 static void __exit tps_exit(void)
1058 {
1059         i2c_del_driver(&tps65010_driver);
1060 }
1061 module_exit(tps_exit);
1062