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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 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}
521
522static int tps65010_probe(struct i2c_client *client)
523{
524 const struct i2c_device_id *id = i2c_client_get_device_id(client);
525 struct tps65010 *tps;
526 int status;
527 struct tps65010_board *board = dev_get_platdata(&client->dev);
528
529 if (the_tps) {
530 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
531 return -ENODEV;
532 }
533
534 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
535 return -EINVAL;
536
537 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
538 if (!tps)
539 return -ENOMEM;
540
541 mutex_init(&tps->lock);
542 INIT_DELAYED_WORK(&tps->work, tps65010_work);
543 tps->client = client;
544 tps->model = id->driver_data;
545
546 /* the IRQ is active low, but many gpio lines can't support that
547 * so this driver uses falling-edge triggers instead.
548 */
549 if (client->irq > 0) {
550 status = request_irq(client->irq, tps65010_irq,
551 IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
552 if (status < 0) {
553 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
554 client->irq, status);
555 return status;
556 }
557 /* annoying race here, ideally we'd have an option
558 * to claim the irq now and enable it later.
559 * FIXME genirq IRQF_NOAUTOEN now solves that ...
560 */
561 disable_irq(client->irq);
562 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
563 } else
564 dev_warn(&client->dev, "IRQ not configured!\n");
565
566
567 switch (tps->model) {
568 case TPS65010:
569 case TPS65012:
570 tps->por = 1;
571 break;
572 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
573 }
574 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
575 show_chgconfig(tps->por, "conf/init", tps->chgconf);
576
577 show_chgstatus("chg/init",
578 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
579 show_regstatus("reg/init",
580 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
581
582 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
583 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
584 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
585 i2c_smbus_read_byte_data(client, TPS_VREGS1));
586 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
587 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
588 i2c_smbus_read_byte_data(client, TPS_MASK3));
589
590 i2c_set_clientdata(client, tps);
591 the_tps = tps;
592
593#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
594 /* USB hosts can't draw VBUS. OTG devices could, later
595 * when OTG infrastructure enables it. USB peripherals
596 * could be relying on VBUS while booting, though.
597 */
598 tps->vbus = 100;
599#endif
600
601 /* unmask the "interesting" irqs, then poll once to
602 * kickstart monitoring, initialize shadowed status
603 * registers, and maybe disable VBUS draw.
604 */
605 tps->nmask1 = ~0;
606 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
607
608 tps->nmask2 = TPS_REG_ONOFF;
609 if (tps->model == TPS65013)
610 tps->nmask2 |= TPS_REG_NO_CHG;
611 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
612
613 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
614 | i2c_smbus_read_byte_data(client, TPS_MASK3));
615
616 tps65010_work(&tps->work.work);
617
618 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
619 tps, DEBUG_FOPS);
620
621 /* optionally register GPIOs */
622 if (board && board->base != 0) {
623 tps->outmask = board->outmask;
624
625 tps->chip.label = client->name;
626 tps->chip.parent = &client->dev;
627 tps->chip.owner = THIS_MODULE;
628
629 tps->chip.set = tps65010_gpio_set;
630 tps->chip.direction_output = tps65010_output;
631
632 /* NOTE: only partial support for inputs; nyet IRQs */
633 tps->chip.get = tps65010_gpio_get;
634
635 tps->chip.base = board->base;
636 tps->chip.ngpio = 7;
637 tps->chip.can_sleep = 1;
638
639 status = gpiochip_add_data(&tps->chip, tps);
640 if (status < 0)
641 dev_err(&client->dev, "can't add gpiochip, err %d\n",
642 status);
643 else if (board->setup) {
644 status = board->setup(client, board->context);
645 if (status < 0) {
646 dev_dbg(&client->dev,
647 "board %s %s err %d\n",
648 "setup", client->name, status);
649 status = 0;
650 }
651 }
652 }
653
654 return 0;
655}
656
657static const struct i2c_device_id tps65010_id[] = {
658 { "tps65010", TPS65010 },
659 { "tps65011", TPS65011 },
660 { "tps65012", TPS65012 },
661 { "tps65013", TPS65013 },
662 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
663 { }
664};
665MODULE_DEVICE_TABLE(i2c, tps65010_id);
666
667static struct i2c_driver tps65010_driver = {
668 .driver = {
669 .name = "tps65010",
670 },
671 .probe_new = tps65010_probe,
672 .remove = tps65010_remove,
673 .id_table = tps65010_id,
674};
675
676/*-------------------------------------------------------------------------*/
677
678/* Draw from VBUS:
679 * 0 mA -- DON'T DRAW (might supply power instead)
680 * 100 mA -- usb unit load (slowest charge rate)
681 * 500 mA -- usb high power (fast battery charge)
682 */
683int tps65010_set_vbus_draw(unsigned mA)
684{
685 unsigned long flags;
686
687 if (!the_tps)
688 return -ENODEV;
689
690 /* assumes non-SMP */
691 local_irq_save(flags);
692 if (mA >= 500)
693 mA = 500;
694 else if (mA >= 100)
695 mA = 100;
696 else
697 mA = 0;
698 the_tps->vbus = mA;
699 if ((the_tps->chgstatus & TPS_CHG_USB)
700 && test_and_set_bit(
701 FLAG_VBUS_CHANGED, &the_tps->flags)) {
702 /* gadget drivers call this in_irq() */
703 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
704 0);
705 }
706 local_irq_restore(flags);
707
708 return 0;
709}
710EXPORT_SYMBOL(tps65010_set_vbus_draw);
711
712/*-------------------------------------------------------------------------*/
713/* tps65010_set_gpio_out_value parameter:
714 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4
715 * value: LOW or HIGH
716 */
717int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
718{
719 int status;
720 unsigned defgpio;
721
722 if (!the_tps)
723 return -ENODEV;
724 if ((gpio < GPIO1) || (gpio > GPIO4))
725 return -EINVAL;
726
727 mutex_lock(&the_tps->lock);
728
729 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
730
731 /* Configure GPIO for output */
732 defgpio |= 1 << (gpio + 3);
733
734 /* Writing 1 forces a logic 0 on that GPIO and vice versa */
735 switch (value) {
736 case LOW:
737 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */
738 break;
739 /* case HIGH: */
740 default:
741 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
742 break;
743 }
744
745 status = i2c_smbus_write_byte_data(the_tps->client,
746 TPS_DEFGPIO, defgpio);
747
748 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
749 gpio, value ? "high" : "low",
750 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
751
752 mutex_unlock(&the_tps->lock);
753 return status;
754}
755EXPORT_SYMBOL(tps65010_set_gpio_out_value);
756
757/*-------------------------------------------------------------------------*/
758/* tps65010_set_led parameter:
759 * led: LED1 or LED2
760 * mode: ON, OFF or BLINK
761 */
762int tps65010_set_led(unsigned led, unsigned mode)
763{
764 int status;
765 unsigned led_on, led_per, offs;
766
767 if (!the_tps)
768 return -ENODEV;
769
770 if (led == LED1)
771 offs = 0;
772 else {
773 offs = 2;
774 led = LED2;
775 }
776
777 mutex_lock(&the_tps->lock);
778
779 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
780 i2c_smbus_read_byte_data(the_tps->client,
781 TPS_LED1_ON + offs));
782
783 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
784 i2c_smbus_read_byte_data(the_tps->client,
785 TPS_LED1_PER + offs));
786
787 switch (mode) {
788 case OFF:
789 led_on = 1 << 7;
790 led_per = 0 << 7;
791 break;
792 case ON:
793 led_on = 1 << 7;
794 led_per = 1 << 7;
795 break;
796 case BLINK:
797 led_on = 0x30 | (0 << 7);
798 led_per = 0x08 | (1 << 7);
799 break;
800 default:
801 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
802 DRIVER_NAME);
803 mutex_unlock(&the_tps->lock);
804 return -EINVAL;
805 }
806
807 status = i2c_smbus_write_byte_data(the_tps->client,
808 TPS_LED1_ON + offs, led_on);
809
810 if (status != 0) {
811 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
812 DRIVER_NAME, led);
813 mutex_unlock(&the_tps->lock);
814 return status;
815 }
816
817 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
818 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
819
820 status = i2c_smbus_write_byte_data(the_tps->client,
821 TPS_LED1_PER + offs, led_per);
822
823 if (status != 0) {
824 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
825 DRIVER_NAME, led);
826 mutex_unlock(&the_tps->lock);
827 return status;
828 }
829
830 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led,
831 i2c_smbus_read_byte_data(the_tps->client,
832 TPS_LED1_PER + offs));
833
834 mutex_unlock(&the_tps->lock);
835
836 return status;
837}
838EXPORT_SYMBOL(tps65010_set_led);
839
840/*-------------------------------------------------------------------------*/
841/* tps65010_set_vib parameter:
842 * value: ON or OFF
843 */
844int tps65010_set_vib(unsigned value)
845{
846 int status;
847 unsigned vdcdc2;
848
849 if (!the_tps)
850 return -ENODEV;
851
852 mutex_lock(&the_tps->lock);
853
854 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
855 vdcdc2 &= ~(1 << 1);
856 if (value)
857 vdcdc2 |= (1 << 1);
858 status = i2c_smbus_write_byte_data(the_tps->client,
859 TPS_VDCDC2, vdcdc2);
860
861 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
862
863 mutex_unlock(&the_tps->lock);
864 return status;
865}
866EXPORT_SYMBOL(tps65010_set_vib);
867
868/*-------------------------------------------------------------------------*/
869/* tps65010_set_low_pwr parameter:
870 * mode: ON or OFF
871 */
872int tps65010_set_low_pwr(unsigned mode)
873{
874 int status;
875 unsigned vdcdc1;
876
877 if (!the_tps)
878 return -ENODEV;
879
880 mutex_lock(&the_tps->lock);
881
882 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
883 mode ? "enable" : "disable",
884 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
885
886 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
887
888 switch (mode) {
889 case OFF:
890 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
891 break;
892 /* case ON: */
893 default:
894 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
895 break;
896 }
897
898 status = i2c_smbus_write_byte_data(the_tps->client,
899 TPS_VDCDC1, vdcdc1);
900
901 if (status != 0)
902 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
903 DRIVER_NAME);
904 else
905 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
906 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
907
908 mutex_unlock(&the_tps->lock);
909
910 return status;
911}
912EXPORT_SYMBOL(tps65010_set_low_pwr);
913
914/*-------------------------------------------------------------------------*/
915/* tps65010_config_vregs1 parameter:
916 * value to be written to VREGS1 register
917 * Note: The complete register is written, set all bits you need
918 */
919int tps65010_config_vregs1(unsigned value)
920{
921 int status;
922
923 if (!the_tps)
924 return -ENODEV;
925
926 mutex_lock(&the_tps->lock);
927
928 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
929 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
930
931 status = i2c_smbus_write_byte_data(the_tps->client,
932 TPS_VREGS1, value);
933
934 if (status != 0)
935 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
936 DRIVER_NAME);
937 else
938 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
939 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
940
941 mutex_unlock(&the_tps->lock);
942
943 return status;
944}
945EXPORT_SYMBOL(tps65010_config_vregs1);
946
947int tps65010_config_vdcdc2(unsigned value)
948{
949 struct i2c_client *c;
950 int status;
951
952 if (!the_tps)
953 return -ENODEV;
954
955 c = the_tps->client;
956 mutex_lock(&the_tps->lock);
957
958 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
959 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
960
961 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
962
963 if (status != 0)
964 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
965 DRIVER_NAME);
966 else
967 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
968 i2c_smbus_read_byte_data(c, TPS_VDCDC2));
969
970 mutex_unlock(&the_tps->lock);
971 return status;
972}
973EXPORT_SYMBOL(tps65010_config_vdcdc2);
974
975/*-------------------------------------------------------------------------*/
976/* tps65013_set_low_pwr parameter:
977 * mode: ON or OFF
978 */
979
980/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
981 required if power supply is through a battery */
982
983int tps65013_set_low_pwr(unsigned mode)
984{
985 int status;
986 unsigned vdcdc1, chgconfig;
987
988 if (!the_tps || the_tps->por)
989 return -ENODEV;
990
991 mutex_lock(&the_tps->lock);
992
993 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
994 DRIVER_NAME,
995 mode ? "enable" : "disable",
996 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
997 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
998
999 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1000 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1001
1002 switch (mode) {
1003 case OFF:
1004 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1005 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1006 break;
1007 /* case ON: */
1008 default:
1009 chgconfig |= TPS65013_AUA; /* enable AUA bit */
1010 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */
1011 break;
1012 }
1013
1014 status = i2c_smbus_write_byte_data(the_tps->client,
1015 TPS_CHGCONFIG, chgconfig);
1016 if (status != 0) {
1017 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1018 DRIVER_NAME);
1019 mutex_unlock(&the_tps->lock);
1020 return status;
1021 }
1022
1023 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1024 the_tps->chgconf = chgconfig;
1025 show_chgconfig(0, "chgconf", chgconfig);
1026
1027 status = i2c_smbus_write_byte_data(the_tps->client,
1028 TPS_VDCDC1, vdcdc1);
1029
1030 if (status != 0)
1031 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1032 DRIVER_NAME);
1033 else
1034 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1035 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1036
1037 mutex_unlock(&the_tps->lock);
1038
1039 return status;
1040}
1041EXPORT_SYMBOL(tps65013_set_low_pwr);
1042
1043/*-------------------------------------------------------------------------*/
1044
1045static int __init tps_init(void)
1046{
1047 return i2c_add_driver(&tps65010_driver);
1048}
1049/* NOTE: this MUST be initialized before the other parts of the system
1050 * that rely on it ... but after the i2c bus on which this relies.
1051 * That is, much earlier than on PC-type systems, which don't often use
1052 * I2C as a core system bus.
1053 */
1054subsys_initcall(tps_init);
1055
1056static void __exit tps_exit(void)
1057{
1058 i2c_del_driver(&tps65010_driver);
1059}
1060module_exit(tps_exit);
1061
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