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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
32MODULE_DESCRIPTION("TPS6501x Power Management Driver");
33MODULE_LICENSE("GPL");
34
35static 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 */
53enum tps_model {
54 TPS65010,
55 TPS65011,
56 TPS65012,
57 TPS65013,
58};
59
60struct 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
88static 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
104static 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
118static 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
148static 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
156static 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
164static 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
174static inline void show_chgstatus(const char *label, u8 chgstatus) { }
175static inline void show_regstatus(const char *label, u8 chgstatus) { }
176static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
177
178#endif
179
180#ifdef CONFIG_DEBUG_FS
181
182static 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
286static int dbg_tps_open(struct inode *inode, struct file *file)
287{
288 return single_open(file, dbg_show, inode->i_private);
289}
290
291static 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 */
307static 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 */
397static 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
432static 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 */
448static void
449tps65010_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
459static int
460tps65010_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
478static 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
502static struct tps65010 *the_tps;
503
504static void 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 board->teardown(client, &tps->chip);
511 if (client->irq > 0)
512 free_irq(client->irq, tps);
513 cancel_delayed_work_sync(&tps->work);
514 debugfs_remove(tps->file);
515 the_tps = NULL;
516}
517
518static int tps65010_probe(struct i2c_client *client)
519{
520 const struct i2c_device_id *id = i2c_client_get_device_id(client);
521 struct tps65010 *tps;
522 int status;
523 struct tps65010_board *board = dev_get_platdata(&client->dev);
524
525 if (the_tps) {
526 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
527 return -ENODEV;
528 }
529
530 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
531 return -EINVAL;
532
533 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
534 if (!tps)
535 return -ENOMEM;
536
537 mutex_init(&tps->lock);
538 INIT_DELAYED_WORK(&tps->work, tps65010_work);
539 tps->client = client;
540 tps->model = id->driver_data;
541
542 /* the IRQ is active low, but many gpio lines can't support that
543 * so this driver uses falling-edge triggers instead.
544 */
545 if (client->irq > 0) {
546 status = request_irq(client->irq, tps65010_irq,
547 IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
548 if (status < 0) {
549 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
550 client->irq, status);
551 return status;
552 }
553 /* annoying race here, ideally we'd have an option
554 * to claim the irq now and enable it later.
555 * FIXME genirq IRQF_NOAUTOEN now solves that ...
556 */
557 disable_irq(client->irq);
558 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
559 } else
560 dev_warn(&client->dev, "IRQ not configured!\n");
561
562
563 switch (tps->model) {
564 case TPS65010:
565 case TPS65012:
566 tps->por = 1;
567 break;
568 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
569 }
570 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
571 show_chgconfig(tps->por, "conf/init", tps->chgconf);
572
573 show_chgstatus("chg/init",
574 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
575 show_regstatus("reg/init",
576 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
577
578 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
579 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
580 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
581 i2c_smbus_read_byte_data(client, TPS_VREGS1));
582 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
583 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
584 i2c_smbus_read_byte_data(client, TPS_MASK3));
585
586 i2c_set_clientdata(client, tps);
587 the_tps = tps;
588
589#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
590 /* USB hosts can't draw VBUS. OTG devices could, later
591 * when OTG infrastructure enables it. USB peripherals
592 * could be relying on VBUS while booting, though.
593 */
594 tps->vbus = 100;
595#endif
596
597 /* unmask the "interesting" irqs, then poll once to
598 * kickstart monitoring, initialize shadowed status
599 * registers, and maybe disable VBUS draw.
600 */
601 tps->nmask1 = ~0;
602 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
603
604 tps->nmask2 = TPS_REG_ONOFF;
605 if (tps->model == TPS65013)
606 tps->nmask2 |= TPS_REG_NO_CHG;
607 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
608
609 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
610 | i2c_smbus_read_byte_data(client, TPS_MASK3));
611
612 tps65010_work(&tps->work.work);
613
614 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
615 tps, DEBUG_FOPS);
616
617 /* optionally register GPIOs */
618 if (board) {
619 tps->outmask = board->outmask;
620
621 tps->chip.label = client->name;
622 tps->chip.parent = &client->dev;
623 tps->chip.owner = THIS_MODULE;
624
625 tps->chip.set = tps65010_gpio_set;
626 tps->chip.direction_output = tps65010_output;
627
628 /* NOTE: only partial support for inputs; nyet IRQs */
629 tps->chip.get = tps65010_gpio_get;
630
631 tps->chip.base = -1;
632 tps->chip.ngpio = 7;
633 tps->chip.can_sleep = 1;
634
635 status = gpiochip_add_data(&tps->chip, tps);
636 if (status < 0)
637 dev_err(&client->dev, "can't add gpiochip, err %d\n",
638 status);
639 else if (board->setup) {
640 status = board->setup(client, &tps->chip);
641 if (status < 0) {
642 dev_dbg(&client->dev,
643 "board %s %s err %d\n",
644 "setup", client->name, status);
645 status = 0;
646 }
647 }
648 }
649
650 return 0;
651}
652
653static const struct i2c_device_id tps65010_id[] = {
654 { "tps65010", TPS65010 },
655 { "tps65011", TPS65011 },
656 { "tps65012", TPS65012 },
657 { "tps65013", TPS65013 },
658 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
659 { }
660};
661MODULE_DEVICE_TABLE(i2c, tps65010_id);
662
663static struct i2c_driver tps65010_driver = {
664 .driver = {
665 .name = "tps65010",
666 },
667 .probe = tps65010_probe,
668 .remove = tps65010_remove,
669 .id_table = tps65010_id,
670};
671
672/*-------------------------------------------------------------------------*/
673
674/* Draw from VBUS:
675 * 0 mA -- DON'T DRAW (might supply power instead)
676 * 100 mA -- usb unit load (slowest charge rate)
677 * 500 mA -- usb high power (fast battery charge)
678 */
679int tps65010_set_vbus_draw(unsigned mA)
680{
681 unsigned long flags;
682
683 if (!the_tps)
684 return -ENODEV;
685
686 /* assumes non-SMP */
687 local_irq_save(flags);
688 if (mA >= 500)
689 mA = 500;
690 else if (mA >= 100)
691 mA = 100;
692 else
693 mA = 0;
694 the_tps->vbus = mA;
695 if ((the_tps->chgstatus & TPS_CHG_USB)
696 && test_and_set_bit(
697 FLAG_VBUS_CHANGED, &the_tps->flags)) {
698 /* gadget drivers call this in_irq() */
699 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
700 0);
701 }
702 local_irq_restore(flags);
703
704 return 0;
705}
706EXPORT_SYMBOL(tps65010_set_vbus_draw);
707
708/*-------------------------------------------------------------------------*/
709/* tps65010_set_gpio_out_value parameter:
710 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
711 * value: LOW or HIGH
712 */
713int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
714{
715 int status;
716 unsigned defgpio;
717
718 if (!the_tps)
719 return -ENODEV;
720 if ((gpio < GPIO1) || (gpio > GPIO4))
721 return -EINVAL;
722
723 mutex_lock(&the_tps->lock);
724
725 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
726
727 /* Configure GPIO for output */
728 defgpio |= 1 << (gpio + 3);
729
730 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
731 switch (value) {
732 case LOW:
733 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
734 break;
735 /* case HIGH: */
736 default:
737 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
738 break;
739 }
740
741 status = i2c_smbus_write_byte_data(the_tps->client,
742 TPS_DEFGPIO, defgpio);
743
744 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
745 gpio, value ? "high" : "low",
746 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
747
748 mutex_unlock(&the_tps->lock);
749 return status;
750}
751EXPORT_SYMBOL(tps65010_set_gpio_out_value);
752
753/*-------------------------------------------------------------------------*/
754/* tps65010_set_led parameter:
755 * led: LED1 or LED2
756 * mode: ON, OFF or BLINK
757 */
758int tps65010_set_led(unsigned led, unsigned mode)
759{
760 int status;
761 unsigned led_on, led_per, offs;
762
763 if (!the_tps)
764 return -ENODEV;
765
766 if (led == LED1)
767 offs = 0;
768 else {
769 offs = 2;
770 led = LED2;
771 }
772
773 mutex_lock(&the_tps->lock);
774
775 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
776 i2c_smbus_read_byte_data(the_tps->client,
777 TPS_LED1_ON + offs));
778
779 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
780 i2c_smbus_read_byte_data(the_tps->client,
781 TPS_LED1_PER + offs));
782
783 switch (mode) {
784 case OFF:
785 led_on = 1 << 7;
786 led_per = 0 << 7;
787 break;
788 case ON:
789 led_on = 1 << 7;
790 led_per = 1 << 7;
791 break;
792 case BLINK:
793 led_on = 0x30 | (0 << 7);
794 led_per = 0x08 | (1 << 7);
795 break;
796 default:
797 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
798 DRIVER_NAME);
799 mutex_unlock(&the_tps->lock);
800 return -EINVAL;
801 }
802
803 status = i2c_smbus_write_byte_data(the_tps->client,
804 TPS_LED1_ON + offs, led_on);
805
806 if (status != 0) {
807 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
808 DRIVER_NAME, led);
809 mutex_unlock(&the_tps->lock);
810 return status;
811 }
812
813 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
814 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
815
816 status = i2c_smbus_write_byte_data(the_tps->client,
817 TPS_LED1_PER + offs, led_per);
818
819 if (status != 0) {
820 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
821 DRIVER_NAME, led);
822 mutex_unlock(&the_tps->lock);
823 return status;
824 }
825
826 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
827 i2c_smbus_read_byte_data(the_tps->client,
828 TPS_LED1_PER + offs));
829
830 mutex_unlock(&the_tps->lock);
831
832 return status;
833}
834EXPORT_SYMBOL(tps65010_set_led);
835
836/*-------------------------------------------------------------------------*/
837/* tps65010_set_vib parameter:
838 * value: ON or OFF
839 */
840int tps65010_set_vib(unsigned value)
841{
842 int status;
843 unsigned vdcdc2;
844
845 if (!the_tps)
846 return -ENODEV;
847
848 mutex_lock(&the_tps->lock);
849
850 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
851 vdcdc2 &= ~(1 << 1);
852 if (value)
853 vdcdc2 |= (1 << 1);
854 status = i2c_smbus_write_byte_data(the_tps->client,
855 TPS_VDCDC2, vdcdc2);
856
857 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
858
859 mutex_unlock(&the_tps->lock);
860 return status;
861}
862EXPORT_SYMBOL(tps65010_set_vib);
863
864/*-------------------------------------------------------------------------*/
865/* tps65010_set_low_pwr parameter:
866 * mode: ON or OFF
867 */
868int tps65010_set_low_pwr(unsigned mode)
869{
870 int status;
871 unsigned vdcdc1;
872
873 if (!the_tps)
874 return -ENODEV;
875
876 mutex_lock(&the_tps->lock);
877
878 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
879 mode ? "enable" : "disable",
880 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
881
882 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
883
884 switch (mode) {
885 case OFF:
886 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
887 break;
888 /* case ON: */
889 default:
890 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
891 break;
892 }
893
894 status = i2c_smbus_write_byte_data(the_tps->client,
895 TPS_VDCDC1, vdcdc1);
896
897 if (status != 0)
898 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
899 DRIVER_NAME);
900 else
901 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
902 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
903
904 mutex_unlock(&the_tps->lock);
905
906 return status;
907}
908EXPORT_SYMBOL(tps65010_set_low_pwr);
909
910/*-------------------------------------------------------------------------*/
911/* tps65010_config_vregs1 parameter:
912 * value to be written to VREGS1 register
913 * Note: The complete register is written, set all bits you need
914 */
915int tps65010_config_vregs1(unsigned value)
916{
917 int status;
918
919 if (!the_tps)
920 return -ENODEV;
921
922 mutex_lock(&the_tps->lock);
923
924 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
925 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
926
927 status = i2c_smbus_write_byte_data(the_tps->client,
928 TPS_VREGS1, value);
929
930 if (status != 0)
931 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
932 DRIVER_NAME);
933 else
934 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
935 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
936
937 mutex_unlock(&the_tps->lock);
938
939 return status;
940}
941EXPORT_SYMBOL(tps65010_config_vregs1);
942
943int tps65010_config_vdcdc2(unsigned value)
944{
945 struct i2c_client *c;
946 int status;
947
948 if (!the_tps)
949 return -ENODEV;
950
951 c = the_tps->client;
952 mutex_lock(&the_tps->lock);
953
954 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
955 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
956
957 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
958
959 if (status != 0)
960 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
961 DRIVER_NAME);
962 else
963 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
964 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
965
966 mutex_unlock(&the_tps->lock);
967 return status;
968}
969EXPORT_SYMBOL(tps65010_config_vdcdc2);
970
971/*-------------------------------------------------------------------------*/
972/* tps65013_set_low_pwr parameter:
973 * mode: ON or OFF
974 */
975
976/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
977 required if power supply is through a battery */
978
979int tps65013_set_low_pwr(unsigned mode)
980{
981 int status;
982 unsigned vdcdc1, chgconfig;
983
984 if (!the_tps || the_tps->por)
985 return -ENODEV;
986
987 mutex_lock(&the_tps->lock);
988
989 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
990 DRIVER_NAME,
991 mode ? "enable" : "disable",
992 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
993 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
994
995 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
996 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
997
998 switch (mode) {
999 case OFF:
1000 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1001 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1002 break;
1003 /* case ON: */
1004 default:
1005 chgconfig |= TPS65013_AUA; /* enable AUA bit */
1006 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
1007 break;
1008 }
1009
1010 status = i2c_smbus_write_byte_data(the_tps->client,
1011 TPS_CHGCONFIG, chgconfig);
1012 if (status != 0) {
1013 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1014 DRIVER_NAME);
1015 mutex_unlock(&the_tps->lock);
1016 return status;
1017 }
1018
1019 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1020 the_tps->chgconf = chgconfig;
1021 show_chgconfig(0, "chgconf", chgconfig);
1022
1023 status = i2c_smbus_write_byte_data(the_tps->client,
1024 TPS_VDCDC1, vdcdc1);
1025
1026 if (status != 0)
1027 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1028 DRIVER_NAME);
1029 else
1030 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1031 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1032
1033 mutex_unlock(&the_tps->lock);
1034
1035 return status;
1036}
1037EXPORT_SYMBOL(tps65013_set_low_pwr);
1038
1039/*-------------------------------------------------------------------------*/
1040
1041static int __init tps_init(void)
1042{
1043 return i2c_add_driver(&tps65010_driver);
1044}
1045/* NOTE: this MUST be initialized before the other parts of the system
1046 * that rely on it ... but after the i2c bus on which this relies.
1047 * That is, much earlier than on PC-type systems, which don't often use
1048 * I2C as a core system bus.
1049 */
1050subsys_initcall(tps_init);
1051
1052static void __exit tps_exit(void)
1053{
1054 i2c_del_driver(&tps65010_driver);
1055}
1056module_exit(tps_exit);
1057
1/*
2 * tps65010 - driver for tps6501x power management chips
3 *
4 * Copyright (C) 2004 Texas Instruments
5 * Copyright (C) 2004-2005 David Brownell
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/interrupt.h>
27#include <linux/i2c.h>
28#include <linux/delay.h>
29#include <linux/workqueue.h>
30#include <linux/debugfs.h>
31#include <linux/seq_file.h>
32#include <linux/mutex.h>
33#include <linux/platform_device.h>
34
35#include <linux/i2c/tps65010.h>
36
37#include <linux/gpio.h>
38
39
40/*-------------------------------------------------------------------------*/
41
42#define DRIVER_VERSION "2 May 2005"
43#define DRIVER_NAME (tps65010_driver.driver.name)
44
45MODULE_DESCRIPTION("TPS6501x Power Management Driver");
46MODULE_LICENSE("GPL");
47
48static struct i2c_driver tps65010_driver;
49
50/*-------------------------------------------------------------------------*/
51
52/* This driver handles a family of multipurpose chips, which incorporate
53 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
54 * and other features often needed in portable devices like cell phones
55 * or digital cameras.
56 *
57 * The tps65011 and tps65013 have different voltage settings compared
58 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq.
59 * All except tps65010 have "wait" mode, possibly defaulted so that
60 * battery-insert != device-on.
61 *
62 * We could distinguish between some models by checking VDCDC1.UVLO or
63 * other registers, unless they've been changed already after powerup
64 * as part of board setup by a bootloader.
65 */
66enum tps_model {
67 TPS65010,
68 TPS65011,
69 TPS65012,
70 TPS65013,
71};
72
73struct tps65010 {
74 struct i2c_client *client;
75 struct mutex lock;
76 struct delayed_work work;
77 struct dentry *file;
78 unsigned charging:1;
79 unsigned por:1;
80 unsigned model:8;
81 u16 vbus;
82 unsigned long flags;
83#define FLAG_VBUS_CHANGED 0
84#define FLAG_IRQ_ENABLE 1
85
86 /* copies of last register state */
87 u8 chgstatus, regstatus, chgconf;
88 u8 nmask1, nmask2;
89
90 u8 outmask;
91 struct gpio_chip chip;
92 struct platform_device *leds;
93};
94
95#define POWER_POLL_DELAY msecs_to_jiffies(5000)
96
97/*-------------------------------------------------------------------------*/
98
99#if defined(DEBUG) || defined(CONFIG_DEBUG_FS)
100
101static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
102{
103 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
104 chgstatus,
105 (chgstatus & TPS_CHG_USB) ? " USB" : "",
106 (chgstatus & TPS_CHG_AC) ? " AC" : "",
107 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
108 (chgstatus & TPS_CHG_TERM) ? " done" :
109 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
110 ? " (charging)" : ""),
111 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
112 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
113 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
114 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
115}
116
117static void dbg_regstat(char *buf, size_t len, u8 regstatus)
118{
119 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
120 regstatus,
121 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
122 (regstatus & TPS_REG_COVER) ? " uncover" : "",
123 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
124 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
125 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
126 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
127 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
128 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
129}
130
131static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
132{
133 const char *hibit;
134
135 if (por)
136 hibit = (chgconfig & TPS_CHARGE_POR)
137 ? "POR=69ms" : "POR=1sec";
138 else
139 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
140
141 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
142 chgconfig, hibit,
143 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
144 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
145 ({int p; switch ((chgconfig >> 3) & 3) {
146 case 3: p = 100; break;
147 case 2: p = 75; break;
148 case 1: p = 50; break;
149 default: p = 25; break;
150 }; p; }),
151 (chgconfig & TPS_VBUS_CHARGING)
152 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
153 : 0,
154 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
155}
156
157#endif
158
159#ifdef DEBUG
160
161static void show_chgstatus(const char *label, u8 chgstatus)
162{
163 char buf [100];
164
165 dbg_chgstat(buf, sizeof buf, chgstatus);
166 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
167}
168
169static void show_regstatus(const char *label, u8 regstatus)
170{
171 char buf [100];
172
173 dbg_regstat(buf, sizeof buf, regstatus);
174 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
175}
176
177static void show_chgconfig(int por, const char *label, u8 chgconfig)
178{
179 char buf [100];
180
181 dbg_chgconf(por, buf, sizeof buf, chgconfig);
182 pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
183}
184
185#else
186
187static inline void show_chgstatus(const char *label, u8 chgstatus) { }
188static inline void show_regstatus(const char *label, u8 chgstatus) { }
189static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
190
191#endif
192
193#ifdef CONFIG_DEBUG_FS
194
195static int dbg_show(struct seq_file *s, void *_)
196{
197 struct tps65010 *tps = s->private;
198 u8 value, v2;
199 unsigned i;
200 char buf[100];
201 const char *chip;
202
203 switch (tps->model) {
204 case TPS65010: chip = "tps65010"; break;
205 case TPS65011: chip = "tps65011"; break;
206 case TPS65012: chip = "tps65012"; break;
207 case TPS65013: chip = "tps65013"; break;
208 default: chip = NULL; break;
209 }
210 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
211 DRIVER_NAME, DRIVER_VERSION, chip);
212
213 mutex_lock(&tps->lock);
214
215 /* FIXME how can we tell whether a battery is present?
216 * likely involves a charge gauging chip (like BQ26501).
217 */
218
219 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
220
221
222 /* registers for monitoring battery charging and status; note
223 * that reading chgstat and regstat may ack IRQs...
224 */
225 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
226 dbg_chgconf(tps->por, buf, sizeof buf, value);
227 seq_printf(s, "chgconfig %s", buf);
228
229 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
230 dbg_chgstat(buf, sizeof buf, value);
231 seq_printf(s, "chgstat %s", buf);
232 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
233 dbg_chgstat(buf, sizeof buf, value);
234 seq_printf(s, "mask1 %s", buf);
235 /* ignore ackint1 */
236
237 value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
238 dbg_regstat(buf, sizeof buf, value);
239 seq_printf(s, "regstat %s", buf);
240 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
241 dbg_regstat(buf, sizeof buf, value);
242 seq_printf(s, "mask2 %s\n", buf);
243 /* ignore ackint2 */
244
245 queue_delayed_work(system_power_efficient_wq, &tps->work,
246 POWER_POLL_DELAY);
247
248 /* VMAIN voltage, enable lowpower, etc */
249 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
250 seq_printf(s, "vdcdc1 %02x\n", value);
251
252 /* VCORE voltage, vibrator on/off */
253 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
254 seq_printf(s, "vdcdc2 %02x\n", value);
255
256 /* both LD0s, and their lowpower behavior */
257 value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
258 seq_printf(s, "vregs1 %02x\n\n", value);
259
260
261 /* LEDs and GPIOs */
262 value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
263 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
264 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
265 (value & 0x80)
266 ? ((v2 & 0x80) ? "on" : "off")
267 : ((v2 & 0x80) ? "blink" : "(nPG)"),
268 value, v2,
269 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
270
271 value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
272 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
273 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
274 (value & 0x80)
275 ? ((v2 & 0x80) ? "on" : "off")
276 : ((v2 & 0x80) ? "blink" : "off"),
277 value, v2,
278 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
279
280 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
281 v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
282 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
283
284 for (i = 0; i < 4; i++) {
285 if (value & (1 << (4 + i)))
286 seq_printf(s, " gpio%d-out %s\n", i + 1,
287 (value & (1 << i)) ? "low" : "hi ");
288 else
289 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1,
290 (value & (1 << i)) ? "hi " : "low",
291 (v2 & (1 << i)) ? "no-irq" : "irq",
292 (v2 & (1 << (4 + i))) ? "rising" : "falling");
293 }
294
295 mutex_unlock(&tps->lock);
296 return 0;
297}
298
299static int dbg_tps_open(struct inode *inode, struct file *file)
300{
301 return single_open(file, dbg_show, inode->i_private);
302}
303
304static const struct file_operations debug_fops = {
305 .open = dbg_tps_open,
306 .read = seq_read,
307 .llseek = seq_lseek,
308 .release = single_release,
309};
310
311#define DEBUG_FOPS &debug_fops
312
313#else
314#define DEBUG_FOPS NULL
315#endif
316
317/*-------------------------------------------------------------------------*/
318
319/* handle IRQS in a task context, so we can use I2C calls */
320static void tps65010_interrupt(struct tps65010 *tps)
321{
322 u8 tmp = 0, mask, poll;
323
324 /* IRQs won't trigger for certain events, but we can get
325 * others by polling (normally, with external power applied).
326 */
327 poll = 0;
328
329 /* regstatus irqs */
330 if (tps->nmask2) {
331 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
332 mask = tmp ^ tps->regstatus;
333 tps->regstatus = tmp;
334 mask &= tps->nmask2;
335 } else
336 mask = 0;
337 if (mask) {
338 tps->regstatus = tmp;
339 /* may need to shut something down ... */
340
341 /* "off" usually means deep sleep */
342 if (tmp & TPS_REG_ONOFF) {
343 pr_info("%s: power off button\n", DRIVER_NAME);
344#if 0
345 /* REVISIT: this might need its own workqueue
346 * plus tweaks including deadlock avoidance ...
347 * also needs to get error handling and probably
348 * an #ifdef CONFIG_HIBERNATION
349 */
350 hibernate();
351#endif
352 poll = 1;
353 }
354 }
355
356 /* chgstatus irqs */
357 if (tps->nmask1) {
358 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
359 mask = tmp ^ tps->chgstatus;
360 tps->chgstatus = tmp;
361 mask &= tps->nmask1;
362 } else
363 mask = 0;
364 if (mask) {
365 unsigned charging = 0;
366
367 show_chgstatus("chg/irq", tmp);
368 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
369 show_chgconfig(tps->por, "conf", tps->chgconf);
370
371 /* Unless it was turned off or disabled, we charge any
372 * battery whenever there's power available for it
373 * and the charger hasn't been disabled.
374 */
375 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
376 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
377 && (tps->chgconf & TPS_CHARGE_ENABLE)
378 ) {
379 if (tps->chgstatus & TPS_CHG_USB) {
380 /* VBUS options are readonly until reconnect */
381 if (mask & TPS_CHG_USB)
382 set_bit(FLAG_VBUS_CHANGED, &tps->flags);
383 charging = 1;
384 } else if (tps->chgstatus & TPS_CHG_AC)
385 charging = 1;
386 }
387 if (charging != tps->charging) {
388 tps->charging = charging;
389 pr_info("%s: battery %scharging\n",
390 DRIVER_NAME, charging ? "" :
391 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
392 ? "NOT " : "dis"));
393 }
394 }
395
396 /* always poll to detect (a) power removal, without tps65013
397 * NO_CHG IRQ; or (b) restart of charging after stop.
398 */
399 if ((tps->model != TPS65013 || !tps->charging)
400 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
401 poll = 1;
402 if (poll)
403 queue_delayed_work(system_power_efficient_wq, &tps->work,
404 POWER_POLL_DELAY);
405
406 /* also potentially gpio-in rise or fall */
407}
408
409/* handle IRQs and polling using keventd for now */
410static void tps65010_work(struct work_struct *work)
411{
412 struct tps65010 *tps;
413
414 tps = container_of(to_delayed_work(work), struct tps65010, work);
415 mutex_lock(&tps->lock);
416
417 tps65010_interrupt(tps);
418
419 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
420 int status;
421 u8 chgconfig, tmp;
422
423 chgconfig = i2c_smbus_read_byte_data(tps->client,
424 TPS_CHGCONFIG);
425 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
426 if (tps->vbus == 500)
427 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
428 else if (tps->vbus >= 100)
429 chgconfig |= TPS_VBUS_CHARGING;
430
431 status = i2c_smbus_write_byte_data(tps->client,
432 TPS_CHGCONFIG, chgconfig);
433
434 /* vbus update fails unless VBUS is connected! */
435 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
436 tps->chgconf = tmp;
437 show_chgconfig(tps->por, "update vbus", tmp);
438 }
439
440 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
441 enable_irq(tps->client->irq);
442
443 mutex_unlock(&tps->lock);
444}
445
446static irqreturn_t tps65010_irq(int irq, void *_tps)
447{
448 struct tps65010 *tps = _tps;
449
450 disable_irq_nosync(irq);
451 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
452 queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
453 return IRQ_HANDLED;
454}
455
456/*-------------------------------------------------------------------------*/
457
458/* offsets 0..3 == GPIO1..GPIO4
459 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
460 * offset 6 == vibrator motor driver
461 */
462static void
463tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
464{
465 if (offset < 4)
466 tps65010_set_gpio_out_value(offset + 1, value);
467 else if (offset < 6)
468 tps65010_set_led(offset - 3, value ? ON : OFF);
469 else
470 tps65010_set_vib(value);
471}
472
473static int
474tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
475{
476 /* GPIOs may be input-only */
477 if (offset < 4) {
478 struct tps65010 *tps;
479
480 tps = container_of(chip, struct tps65010, chip);
481 if (!(tps->outmask & (1 << offset)))
482 return -EINVAL;
483 tps65010_set_gpio_out_value(offset + 1, value);
484 } else if (offset < 6)
485 tps65010_set_led(offset - 3, value ? ON : OFF);
486 else
487 tps65010_set_vib(value);
488
489 return 0;
490}
491
492static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
493{
494 int value;
495 struct tps65010 *tps;
496
497 tps = container_of(chip, struct tps65010, chip);
498
499 if (offset < 4) {
500 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
501 if (value < 0)
502 return value;
503 if (value & (1 << (offset + 4))) /* output */
504 return !(value & (1 << offset));
505 else /* input */
506 return !!(value & (1 << offset));
507 }
508
509 /* REVISIT we *could* report LED1/nPG and LED2 state ... */
510 return 0;
511}
512
513
514/*-------------------------------------------------------------------------*/
515
516static struct tps65010 *the_tps;
517
518static int tps65010_remove(struct i2c_client *client)
519{
520 struct tps65010 *tps = i2c_get_clientdata(client);
521 struct tps65010_board *board = dev_get_platdata(&client->dev);
522
523 if (board && board->teardown) {
524 int status = board->teardown(client, board->context);
525 if (status < 0)
526 dev_dbg(&client->dev, "board %s %s err %d\n",
527 "teardown", client->name, status);
528 }
529 if (client->irq > 0)
530 free_irq(client->irq, tps);
531 cancel_delayed_work_sync(&tps->work);
532 debugfs_remove(tps->file);
533 the_tps = NULL;
534 return 0;
535}
536
537static int tps65010_probe(struct i2c_client *client,
538 const struct i2c_device_id *id)
539{
540 struct tps65010 *tps;
541 int status;
542 struct tps65010_board *board = dev_get_platdata(&client->dev);
543
544 if (the_tps) {
545 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
546 return -ENODEV;
547 }
548
549 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
550 return -EINVAL;
551
552 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
553 if (!tps)
554 return -ENOMEM;
555
556 mutex_init(&tps->lock);
557 INIT_DELAYED_WORK(&tps->work, tps65010_work);
558 tps->client = client;
559 tps->model = id->driver_data;
560
561 /* the IRQ is active low, but many gpio lines can't support that
562 * so this driver uses falling-edge triggers instead.
563 */
564 if (client->irq > 0) {
565 status = request_irq(client->irq, tps65010_irq,
566 IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
567 if (status < 0) {
568 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
569 client->irq, status);
570 return status;
571 }
572 /* annoying race here, ideally we'd have an option
573 * to claim the irq now and enable it later.
574 * FIXME genirq IRQF_NOAUTOEN now solves that ...
575 */
576 disable_irq(client->irq);
577 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
578 } else
579 dev_warn(&client->dev, "IRQ not configured!\n");
580
581
582 switch (tps->model) {
583 case TPS65010:
584 case TPS65012:
585 tps->por = 1;
586 break;
587 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
588 }
589 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
590 show_chgconfig(tps->por, "conf/init", tps->chgconf);
591
592 show_chgstatus("chg/init",
593 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
594 show_regstatus("reg/init",
595 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
596
597 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
598 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
599 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
600 i2c_smbus_read_byte_data(client, TPS_VREGS1));
601 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
602 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
603 i2c_smbus_read_byte_data(client, TPS_MASK3));
604
605 i2c_set_clientdata(client, tps);
606 the_tps = tps;
607
608#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
609 /* USB hosts can't draw VBUS. OTG devices could, later
610 * when OTG infrastructure enables it. USB peripherals
611 * could be relying on VBUS while booting, though.
612 */
613 tps->vbus = 100;
614#endif
615
616 /* unmask the "interesting" irqs, then poll once to
617 * kickstart monitoring, initialize shadowed status
618 * registers, and maybe disable VBUS draw.
619 */
620 tps->nmask1 = ~0;
621 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
622
623 tps->nmask2 = TPS_REG_ONOFF;
624 if (tps->model == TPS65013)
625 tps->nmask2 |= TPS_REG_NO_CHG;
626 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
627
628 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
629 | i2c_smbus_read_byte_data(client, TPS_MASK3));
630
631 tps65010_work(&tps->work.work);
632
633 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
634 tps, DEBUG_FOPS);
635
636 /* optionally register GPIOs */
637 if (board && board->base != 0) {
638 tps->outmask = board->outmask;
639
640 tps->chip.label = client->name;
641 tps->chip.parent = &client->dev;
642 tps->chip.owner = THIS_MODULE;
643
644 tps->chip.set = tps65010_gpio_set;
645 tps->chip.direction_output = tps65010_output;
646
647 /* NOTE: only partial support for inputs; nyet IRQs */
648 tps->chip.get = tps65010_gpio_get;
649
650 tps->chip.base = board->base;
651 tps->chip.ngpio = 7;
652 tps->chip.can_sleep = 1;
653
654 status = gpiochip_add(&tps->chip);
655 if (status < 0)
656 dev_err(&client->dev, "can't add gpiochip, err %d\n",
657 status);
658 else if (board->setup) {
659 status = board->setup(client, board->context);
660 if (status < 0) {
661 dev_dbg(&client->dev,
662 "board %s %s err %d\n",
663 "setup", client->name, status);
664 status = 0;
665 }
666 }
667 }
668
669 return 0;
670}
671
672static const struct i2c_device_id tps65010_id[] = {
673 { "tps65010", TPS65010 },
674 { "tps65011", TPS65011 },
675 { "tps65012", TPS65012 },
676 { "tps65013", TPS65013 },
677 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
678 { }
679};
680MODULE_DEVICE_TABLE(i2c, tps65010_id);
681
682static struct i2c_driver tps65010_driver = {
683 .driver = {
684 .name = "tps65010",
685 },
686 .probe = tps65010_probe,
687 .remove = tps65010_remove,
688 .id_table = tps65010_id,
689};
690
691/*-------------------------------------------------------------------------*/
692
693/* Draw from VBUS:
694 * 0 mA -- DON'T DRAW (might supply power instead)
695 * 100 mA -- usb unit load (slowest charge rate)
696 * 500 mA -- usb high power (fast battery charge)
697 */
698int tps65010_set_vbus_draw(unsigned mA)
699{
700 unsigned long flags;
701
702 if (!the_tps)
703 return -ENODEV;
704
705 /* assumes non-SMP */
706 local_irq_save(flags);
707 if (mA >= 500)
708 mA = 500;
709 else if (mA >= 100)
710 mA = 100;
711 else
712 mA = 0;
713 the_tps->vbus = mA;
714 if ((the_tps->chgstatus & TPS_CHG_USB)
715 && test_and_set_bit(
716 FLAG_VBUS_CHANGED, &the_tps->flags)) {
717 /* gadget drivers call this in_irq() */
718 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
719 0);
720 }
721 local_irq_restore(flags);
722
723 return 0;
724}
725EXPORT_SYMBOL(tps65010_set_vbus_draw);
726
727/*-------------------------------------------------------------------------*/
728/* tps65010_set_gpio_out_value parameter:
729 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
730 * value: LOW or HIGH
731 */
732int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
733{
734 int status;
735 unsigned defgpio;
736
737 if (!the_tps)
738 return -ENODEV;
739 if ((gpio < GPIO1) || (gpio > GPIO4))
740 return -EINVAL;
741
742 mutex_lock(&the_tps->lock);
743
744 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
745
746 /* Configure GPIO for output */
747 defgpio |= 1 << (gpio + 3);
748
749 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
750 switch (value) {
751 case LOW:
752 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
753 break;
754 /* case HIGH: */
755 default:
756 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
757 break;
758 }
759
760 status = i2c_smbus_write_byte_data(the_tps->client,
761 TPS_DEFGPIO, defgpio);
762
763 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
764 gpio, value ? "high" : "low",
765 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
766
767 mutex_unlock(&the_tps->lock);
768 return status;
769}
770EXPORT_SYMBOL(tps65010_set_gpio_out_value);
771
772/*-------------------------------------------------------------------------*/
773/* tps65010_set_led parameter:
774 * led: LED1 or LED2
775 * mode: ON, OFF or BLINK
776 */
777int tps65010_set_led(unsigned led, unsigned mode)
778{
779 int status;
780 unsigned led_on, led_per, offs;
781
782 if (!the_tps)
783 return -ENODEV;
784
785 if (led == LED1)
786 offs = 0;
787 else {
788 offs = 2;
789 led = LED2;
790 }
791
792 mutex_lock(&the_tps->lock);
793
794 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
795 i2c_smbus_read_byte_data(the_tps->client,
796 TPS_LED1_ON + offs));
797
798 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
799 i2c_smbus_read_byte_data(the_tps->client,
800 TPS_LED1_PER + offs));
801
802 switch (mode) {
803 case OFF:
804 led_on = 1 << 7;
805 led_per = 0 << 7;
806 break;
807 case ON:
808 led_on = 1 << 7;
809 led_per = 1 << 7;
810 break;
811 case BLINK:
812 led_on = 0x30 | (0 << 7);
813 led_per = 0x08 | (1 << 7);
814 break;
815 default:
816 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
817 DRIVER_NAME);
818 mutex_unlock(&the_tps->lock);
819 return -EINVAL;
820 }
821
822 status = i2c_smbus_write_byte_data(the_tps->client,
823 TPS_LED1_ON + offs, led_on);
824
825 if (status != 0) {
826 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
827 DRIVER_NAME, led);
828 mutex_unlock(&the_tps->lock);
829 return status;
830 }
831
832 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
833 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
834
835 status = i2c_smbus_write_byte_data(the_tps->client,
836 TPS_LED1_PER + offs, led_per);
837
838 if (status != 0) {
839 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
840 DRIVER_NAME, led);
841 mutex_unlock(&the_tps->lock);
842 return status;
843 }
844
845 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
846 i2c_smbus_read_byte_data(the_tps->client,
847 TPS_LED1_PER + offs));
848
849 mutex_unlock(&the_tps->lock);
850
851 return status;
852}
853EXPORT_SYMBOL(tps65010_set_led);
854
855/*-------------------------------------------------------------------------*/
856/* tps65010_set_vib parameter:
857 * value: ON or OFF
858 */
859int tps65010_set_vib(unsigned value)
860{
861 int status;
862 unsigned vdcdc2;
863
864 if (!the_tps)
865 return -ENODEV;
866
867 mutex_lock(&the_tps->lock);
868
869 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
870 vdcdc2 &= ~(1 << 1);
871 if (value)
872 vdcdc2 |= (1 << 1);
873 status = i2c_smbus_write_byte_data(the_tps->client,
874 TPS_VDCDC2, vdcdc2);
875
876 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
877
878 mutex_unlock(&the_tps->lock);
879 return status;
880}
881EXPORT_SYMBOL(tps65010_set_vib);
882
883/*-------------------------------------------------------------------------*/
884/* tps65010_set_low_pwr parameter:
885 * mode: ON or OFF
886 */
887int tps65010_set_low_pwr(unsigned mode)
888{
889 int status;
890 unsigned vdcdc1;
891
892 if (!the_tps)
893 return -ENODEV;
894
895 mutex_lock(&the_tps->lock);
896
897 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
898 mode ? "enable" : "disable",
899 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
900
901 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
902
903 switch (mode) {
904 case OFF:
905 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
906 break;
907 /* case ON: */
908 default:
909 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
910 break;
911 }
912
913 status = i2c_smbus_write_byte_data(the_tps->client,
914 TPS_VDCDC1, vdcdc1);
915
916 if (status != 0)
917 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
918 DRIVER_NAME);
919 else
920 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
921 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
922
923 mutex_unlock(&the_tps->lock);
924
925 return status;
926}
927EXPORT_SYMBOL(tps65010_set_low_pwr);
928
929/*-------------------------------------------------------------------------*/
930/* tps65010_config_vregs1 parameter:
931 * value to be written to VREGS1 register
932 * Note: The complete register is written, set all bits you need
933 */
934int tps65010_config_vregs1(unsigned value)
935{
936 int status;
937
938 if (!the_tps)
939 return -ENODEV;
940
941 mutex_lock(&the_tps->lock);
942
943 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
944 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
945
946 status = i2c_smbus_write_byte_data(the_tps->client,
947 TPS_VREGS1, value);
948
949 if (status != 0)
950 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
951 DRIVER_NAME);
952 else
953 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
954 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
955
956 mutex_unlock(&the_tps->lock);
957
958 return status;
959}
960EXPORT_SYMBOL(tps65010_config_vregs1);
961
962int tps65010_config_vdcdc2(unsigned value)
963{
964 struct i2c_client *c;
965 int status;
966
967 if (!the_tps)
968 return -ENODEV;
969
970 c = the_tps->client;
971 mutex_lock(&the_tps->lock);
972
973 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
974 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
975
976 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
977
978 if (status != 0)
979 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
980 DRIVER_NAME);
981 else
982 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
983 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
984
985 mutex_unlock(&the_tps->lock);
986 return status;
987}
988EXPORT_SYMBOL(tps65010_config_vdcdc2);
989
990/*-------------------------------------------------------------------------*/
991/* tps65013_set_low_pwr parameter:
992 * mode: ON or OFF
993 */
994
995/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
996 required if power supply is through a battery */
997
998int tps65013_set_low_pwr(unsigned mode)
999{
1000 int status;
1001 unsigned vdcdc1, chgconfig;
1002
1003 if (!the_tps || the_tps->por)
1004 return -ENODEV;
1005
1006 mutex_lock(&the_tps->lock);
1007
1008 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
1009 DRIVER_NAME,
1010 mode ? "enable" : "disable",
1011 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
1012 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1013
1014 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1015 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1016
1017 switch (mode) {
1018 case OFF:
1019 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1020 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1021 break;
1022 /* case ON: */
1023 default:
1024 chgconfig |= TPS65013_AUA; /* enable AUA bit */
1025 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
1026 break;
1027 }
1028
1029 status = i2c_smbus_write_byte_data(the_tps->client,
1030 TPS_CHGCONFIG, chgconfig);
1031 if (status != 0) {
1032 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1033 DRIVER_NAME);
1034 mutex_unlock(&the_tps->lock);
1035 return status;
1036 }
1037
1038 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1039 the_tps->chgconf = chgconfig;
1040 show_chgconfig(0, "chgconf", chgconfig);
1041
1042 status = i2c_smbus_write_byte_data(the_tps->client,
1043 TPS_VDCDC1, vdcdc1);
1044
1045 if (status != 0)
1046 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1047 DRIVER_NAME);
1048 else
1049 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1050 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1051
1052 mutex_unlock(&the_tps->lock);
1053
1054 return status;
1055}
1056EXPORT_SYMBOL(tps65013_set_low_pwr);
1057
1058/*-------------------------------------------------------------------------*/
1059
1060static int __init tps_init(void)
1061{
1062 return i2c_add_driver(&tps65010_driver);
1063}
1064/* NOTE: this MUST be initialized before the other parts of the system
1065 * that rely on it ... but after the i2c bus on which this relies.
1066 * That is, much earlier than on PC-type systems, which don't often use
1067 * I2C as a core system bus.
1068 */
1069subsys_initcall(tps_init);
1070
1071static void __exit tps_exit(void)
1072{
1073 i2c_del_driver(&tps65010_driver);
1074}
1075module_exit(tps_exit);
1076