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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Core driver for TI TPS6586x PMIC family
4 *
5 * Copyright (c) 2010 CompuLab Ltd.
6 * Mike Rapoport <mike@compulab.co.il>
7 *
8 * Based on da903x.c.
9 * Copyright (C) 2008 Compulab, Ltd.
10 * Mike Rapoport <mike@compulab.co.il>
11 * Copyright (C) 2006-2008 Marvell International Ltd.
12 * Eric Miao <eric.miao@marvell.com>
13 */
14
15#include <linux/interrupt.h>
16#include <linux/irq.h>
17#include <linux/irqdomain.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/mutex.h>
21#include <linux/slab.h>
22#include <linux/err.h>
23#include <linux/i2c.h>
24#include <linux/platform_device.h>
25#include <linux/regmap.h>
26#include <linux/of.h>
27
28#include <linux/mfd/core.h>
29#include <linux/mfd/tps6586x.h>
30
31#define TPS6586X_SUPPLYENE 0x14
32#define EXITSLREQ_BIT BIT(1)
33#define SLEEP_MODE_BIT BIT(3)
34
35/* interrupt control registers */
36#define TPS6586X_INT_ACK1 0xb5
37#define TPS6586X_INT_ACK2 0xb6
38#define TPS6586X_INT_ACK3 0xb7
39#define TPS6586X_INT_ACK4 0xb8
40
41/* interrupt mask registers */
42#define TPS6586X_INT_MASK1 0xb0
43#define TPS6586X_INT_MASK2 0xb1
44#define TPS6586X_INT_MASK3 0xb2
45#define TPS6586X_INT_MASK4 0xb3
46#define TPS6586X_INT_MASK5 0xb4
47
48/* device id */
49#define TPS6586X_VERSIONCRC 0xcd
50
51/* Maximum register */
52#define TPS6586X_MAX_REGISTER TPS6586X_VERSIONCRC
53
54struct tps6586x_irq_data {
55 u8 mask_reg;
56 u8 mask_mask;
57};
58
59#define TPS6586X_IRQ(_reg, _mask) \
60 { \
61 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \
62 .mask_mask = (_mask), \
63 }
64
65static const struct tps6586x_irq_data tps6586x_irqs[] = {
66 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
67 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
68 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
69 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
70 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
71 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
72 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
73 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
74 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
75 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
76 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
77 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
78 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
79 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
80 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
81 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
82 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
83 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
84 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
85 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
86 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
87 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
88 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
89 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
90 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
91 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
92 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
93};
94
95static const struct resource tps6586x_rtc_resources[] = {
96 {
97 .start = TPS6586X_INT_RTC_ALM1,
98 .end = TPS6586X_INT_RTC_ALM1,
99 .flags = IORESOURCE_IRQ,
100 },
101};
102
103static const struct mfd_cell tps6586x_cell[] = {
104 {
105 .name = "tps6586x-gpio",
106 },
107 {
108 .name = "tps6586x-regulator",
109 },
110 {
111 .name = "tps6586x-rtc",
112 .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
113 .resources = &tps6586x_rtc_resources[0],
114 },
115 {
116 .name = "tps6586x-onkey",
117 },
118};
119
120struct tps6586x {
121 struct device *dev;
122 struct i2c_client *client;
123 struct regmap *regmap;
124 int version;
125
126 int irq;
127 struct irq_chip irq_chip;
128 struct mutex irq_lock;
129 int irq_base;
130 u32 irq_en;
131 u8 mask_reg[5];
132 struct irq_domain *irq_domain;
133};
134
135static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
136{
137 return i2c_get_clientdata(to_i2c_client(dev));
138}
139
140int tps6586x_write(struct device *dev, int reg, uint8_t val)
141{
142 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
143
144 return regmap_write(tps6586x->regmap, reg, val);
145}
146EXPORT_SYMBOL_GPL(tps6586x_write);
147
148int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
149{
150 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
151
152 return regmap_bulk_write(tps6586x->regmap, reg, val, len);
153}
154EXPORT_SYMBOL_GPL(tps6586x_writes);
155
156int tps6586x_read(struct device *dev, int reg, uint8_t *val)
157{
158 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
159 unsigned int rval;
160 int ret;
161
162 ret = regmap_read(tps6586x->regmap, reg, &rval);
163 if (!ret)
164 *val = rval;
165 return ret;
166}
167EXPORT_SYMBOL_GPL(tps6586x_read);
168
169int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
170{
171 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
172
173 return regmap_bulk_read(tps6586x->regmap, reg, val, len);
174}
175EXPORT_SYMBOL_GPL(tps6586x_reads);
176
177int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
178{
179 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
180
181 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
182}
183EXPORT_SYMBOL_GPL(tps6586x_set_bits);
184
185int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
186{
187 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
188
189 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
190}
191EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
192
193int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
194{
195 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
196
197 return regmap_update_bits(tps6586x->regmap, reg, mask, val);
198}
199EXPORT_SYMBOL_GPL(tps6586x_update);
200
201int tps6586x_irq_get_virq(struct device *dev, int irq)
202{
203 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
204
205 return irq_create_mapping(tps6586x->irq_domain, irq);
206}
207EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
208
209int tps6586x_get_version(struct device *dev)
210{
211 struct tps6586x *tps6586x = dev_get_drvdata(dev);
212
213 return tps6586x->version;
214}
215EXPORT_SYMBOL_GPL(tps6586x_get_version);
216
217static int __remove_subdev(struct device *dev, void *unused)
218{
219 platform_device_unregister(to_platform_device(dev));
220 return 0;
221}
222
223static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
224{
225 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
226}
227
228static void tps6586x_irq_lock(struct irq_data *data)
229{
230 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
231
232 mutex_lock(&tps6586x->irq_lock);
233}
234
235static void tps6586x_irq_enable(struct irq_data *irq_data)
236{
237 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
238 unsigned int __irq = irq_data->hwirq;
239 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
240
241 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
242 tps6586x->irq_en |= (1 << __irq);
243}
244
245static void tps6586x_irq_disable(struct irq_data *irq_data)
246{
247 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
248
249 unsigned int __irq = irq_data->hwirq;
250 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
251
252 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
253 tps6586x->irq_en &= ~(1 << __irq);
254}
255
256static void tps6586x_irq_sync_unlock(struct irq_data *data)
257{
258 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
259 int i;
260
261 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
262 int ret;
263 ret = tps6586x_write(tps6586x->dev,
264 TPS6586X_INT_MASK1 + i,
265 tps6586x->mask_reg[i]);
266 WARN_ON(ret);
267 }
268
269 mutex_unlock(&tps6586x->irq_lock);
270}
271
272static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
273{
274 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
275 return irq_set_irq_wake(tps6586x->irq, on);
276}
277
278static struct irq_chip tps6586x_irq_chip = {
279 .name = "tps6586x",
280 .irq_bus_lock = tps6586x_irq_lock,
281 .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
282 .irq_disable = tps6586x_irq_disable,
283 .irq_enable = tps6586x_irq_enable,
284 .irq_set_wake = pm_sleep_ptr(tps6586x_irq_set_wake),
285};
286
287static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
288 irq_hw_number_t hw)
289{
290 struct tps6586x *tps6586x = h->host_data;
291
292 irq_set_chip_data(virq, tps6586x);
293 irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
294 irq_set_nested_thread(virq, 1);
295 irq_set_noprobe(virq);
296
297 return 0;
298}
299
300static const struct irq_domain_ops tps6586x_domain_ops = {
301 .map = tps6586x_irq_map,
302 .xlate = irq_domain_xlate_twocell,
303};
304
305static irqreturn_t tps6586x_irq(int irq, void *data)
306{
307 struct tps6586x *tps6586x = data;
308 uint32_t acks;
309 __le32 val;
310 int ret = 0;
311
312 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
313 sizeof(acks), (uint8_t *)&val);
314
315 if (ret < 0) {
316 dev_err(tps6586x->dev, "failed to read interrupt status\n");
317 return IRQ_NONE;
318 }
319
320 acks = le32_to_cpu(val);
321
322 while (acks) {
323 int i = __ffs(acks);
324
325 if (tps6586x->irq_en & (1 << i))
326 handle_nested_irq(
327 irq_find_mapping(tps6586x->irq_domain, i));
328
329 acks &= ~(1 << i);
330 }
331
332 return IRQ_HANDLED;
333}
334
335static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
336 int irq_base)
337{
338 int i, ret;
339 u8 tmp[4];
340 int new_irq_base;
341 int irq_num = ARRAY_SIZE(tps6586x_irqs);
342
343 tps6586x->irq = irq;
344
345 mutex_init(&tps6586x->irq_lock);
346 for (i = 0; i < 5; i++) {
347 tps6586x->mask_reg[i] = 0xff;
348 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
349 }
350
351 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
352
353 if (irq_base > 0) {
354 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
355 if (new_irq_base < 0) {
356 dev_err(tps6586x->dev,
357 "Failed to alloc IRQs: %d\n", new_irq_base);
358 return new_irq_base;
359 }
360 } else {
361 new_irq_base = 0;
362 }
363
364 tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
365 irq_num, new_irq_base, &tps6586x_domain_ops,
366 tps6586x);
367 if (!tps6586x->irq_domain) {
368 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
369 return -ENOMEM;
370 }
371 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
372 "tps6586x", tps6586x);
373
374 if (!ret)
375 device_init_wakeup(tps6586x->dev, 1);
376
377 return ret;
378}
379
380static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
381 struct tps6586x_platform_data *pdata)
382{
383 struct tps6586x_subdev_info *subdev;
384 struct platform_device *pdev;
385 int i, ret = 0;
386
387 for (i = 0; i < pdata->num_subdevs; i++) {
388 subdev = &pdata->subdevs[i];
389
390 pdev = platform_device_alloc(subdev->name, subdev->id);
391 if (!pdev) {
392 ret = -ENOMEM;
393 goto failed;
394 }
395
396 pdev->dev.parent = tps6586x->dev;
397 pdev->dev.platform_data = subdev->platform_data;
398 pdev->dev.of_node = subdev->of_node;
399
400 ret = platform_device_add(pdev);
401 if (ret) {
402 platform_device_put(pdev);
403 goto failed;
404 }
405 }
406 return 0;
407
408failed:
409 tps6586x_remove_subdevs(tps6586x);
410 return ret;
411}
412
413#ifdef CONFIG_OF
414static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
415{
416 struct device_node *np = client->dev.of_node;
417 struct tps6586x_platform_data *pdata;
418
419 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
420 if (!pdata)
421 return NULL;
422
423 pdata->num_subdevs = 0;
424 pdata->subdevs = NULL;
425 pdata->gpio_base = -1;
426 pdata->irq_base = -1;
427 pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
428
429 return pdata;
430}
431
432static const struct of_device_id tps6586x_of_match[] = {
433 { .compatible = "ti,tps6586x", },
434 { },
435};
436#else
437static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
438{
439 return NULL;
440}
441#endif
442
443static bool is_volatile_reg(struct device *dev, unsigned int reg)
444{
445 /* Cache all interrupt mask register */
446 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
447 return false;
448
449 return true;
450}
451
452static const struct regmap_config tps6586x_regmap_config = {
453 .reg_bits = 8,
454 .val_bits = 8,
455 .max_register = TPS6586X_MAX_REGISTER,
456 .volatile_reg = is_volatile_reg,
457 .cache_type = REGCACHE_RBTREE,
458};
459
460static struct device *tps6586x_dev;
461static void tps6586x_power_off(void)
462{
463 if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
464 return;
465
466 tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
467}
468
469static void tps6586x_print_version(struct i2c_client *client, int version)
470{
471 const char *name;
472
473 switch (version) {
474 case TPS658621A:
475 name = "TPS658621A";
476 break;
477 case TPS658621CD:
478 name = "TPS658621C/D";
479 break;
480 case TPS658623:
481 name = "TPS658623";
482 break;
483 case TPS658640:
484 case TPS658640v2:
485 name = "TPS658640";
486 break;
487 case TPS658643:
488 name = "TPS658643";
489 break;
490 default:
491 name = "TPS6586X";
492 break;
493 }
494
495 dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
496}
497
498static int tps6586x_i2c_probe(struct i2c_client *client)
499{
500 struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
501 struct tps6586x *tps6586x;
502 int ret;
503 int version;
504
505 if (!pdata && client->dev.of_node)
506 pdata = tps6586x_parse_dt(client);
507
508 if (!pdata) {
509 dev_err(&client->dev, "tps6586x requires platform data\n");
510 return -ENOTSUPP;
511 }
512
513 version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
514 if (version < 0) {
515 dev_err(&client->dev, "Chip ID read failed: %d\n", version);
516 return -EIO;
517 }
518
519 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
520 if (!tps6586x)
521 return -ENOMEM;
522
523 tps6586x->version = version;
524 tps6586x_print_version(client, tps6586x->version);
525
526 tps6586x->client = client;
527 tps6586x->dev = &client->dev;
528 i2c_set_clientdata(client, tps6586x);
529
530 tps6586x->regmap = devm_regmap_init_i2c(client,
531 &tps6586x_regmap_config);
532 if (IS_ERR(tps6586x->regmap)) {
533 ret = PTR_ERR(tps6586x->regmap);
534 dev_err(&client->dev, "regmap init failed: %d\n", ret);
535 return ret;
536 }
537
538
539 if (client->irq) {
540 ret = tps6586x_irq_init(tps6586x, client->irq,
541 pdata->irq_base);
542 if (ret) {
543 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
544 return ret;
545 }
546 }
547
548 ret = mfd_add_devices(tps6586x->dev, -1,
549 tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
550 NULL, 0, tps6586x->irq_domain);
551 if (ret < 0) {
552 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
553 goto err_mfd_add;
554 }
555
556 ret = tps6586x_add_subdevs(tps6586x, pdata);
557 if (ret) {
558 dev_err(&client->dev, "add devices failed: %d\n", ret);
559 goto err_add_devs;
560 }
561
562 if (pdata->pm_off && !pm_power_off) {
563 tps6586x_dev = &client->dev;
564 pm_power_off = tps6586x_power_off;
565 }
566
567 return 0;
568
569err_add_devs:
570 mfd_remove_devices(tps6586x->dev);
571err_mfd_add:
572 if (client->irq)
573 free_irq(client->irq, tps6586x);
574 return ret;
575}
576
577static void tps6586x_i2c_remove(struct i2c_client *client)
578{
579 struct tps6586x *tps6586x = i2c_get_clientdata(client);
580
581 tps6586x_remove_subdevs(tps6586x);
582 mfd_remove_devices(tps6586x->dev);
583 if (client->irq)
584 free_irq(client->irq, tps6586x);
585}
586
587static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
588{
589 struct tps6586x *tps6586x = dev_get_drvdata(dev);
590
591 if (tps6586x->client->irq)
592 disable_irq(tps6586x->client->irq);
593
594 return 0;
595}
596
597static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
598{
599 struct tps6586x *tps6586x = dev_get_drvdata(dev);
600
601 if (tps6586x->client->irq)
602 enable_irq(tps6586x->client->irq);
603
604 return 0;
605}
606
607static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
608 tps6586x_i2c_resume);
609
610static const struct i2c_device_id tps6586x_id_table[] = {
611 { "tps6586x", 0 },
612 { },
613};
614MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
615
616static struct i2c_driver tps6586x_driver = {
617 .driver = {
618 .name = "tps6586x",
619 .of_match_table = of_match_ptr(tps6586x_of_match),
620 .pm = &tps6586x_pm_ops,
621 },
622 .probe_new = tps6586x_i2c_probe,
623 .remove = tps6586x_i2c_remove,
624 .id_table = tps6586x_id_table,
625};
626
627static int __init tps6586x_init(void)
628{
629 return i2c_add_driver(&tps6586x_driver);
630}
631subsys_initcall(tps6586x_init);
632
633static void __exit tps6586x_exit(void)
634{
635 i2c_del_driver(&tps6586x_driver);
636}
637module_exit(tps6586x_exit);
638
639MODULE_DESCRIPTION("TPS6586X core driver");
640MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
641MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Core driver for TI TPS6586x PMIC family
4 *
5 * Copyright (c) 2010 CompuLab Ltd.
6 * Mike Rapoport <mike@compulab.co.il>
7 *
8 * Based on da903x.c.
9 * Copyright (C) 2008 Compulab, Ltd.
10 * Mike Rapoport <mike@compulab.co.il>
11 * Copyright (C) 2006-2008 Marvell International Ltd.
12 * Eric Miao <eric.miao@marvell.com>
13 */
14
15#include <linux/interrupt.h>
16#include <linux/irq.h>
17#include <linux/irqdomain.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/mutex.h>
21#include <linux/slab.h>
22#include <linux/err.h>
23#include <linux/i2c.h>
24#include <linux/platform_device.h>
25#include <linux/reboot.h>
26#include <linux/regmap.h>
27#include <linux/of.h>
28
29#include <linux/mfd/core.h>
30#include <linux/mfd/tps6586x.h>
31
32#define TPS6586X_SUPPLYENE 0x14
33#define SOFT_RST_BIT BIT(0)
34#define EXITSLREQ_BIT BIT(1)
35#define SLEEP_MODE_BIT BIT(3)
36
37/* interrupt control registers */
38#define TPS6586X_INT_ACK1 0xb5
39#define TPS6586X_INT_ACK2 0xb6
40#define TPS6586X_INT_ACK3 0xb7
41#define TPS6586X_INT_ACK4 0xb8
42
43/* interrupt mask registers */
44#define TPS6586X_INT_MASK1 0xb0
45#define TPS6586X_INT_MASK2 0xb1
46#define TPS6586X_INT_MASK3 0xb2
47#define TPS6586X_INT_MASK4 0xb3
48#define TPS6586X_INT_MASK5 0xb4
49
50/* device id */
51#define TPS6586X_VERSIONCRC 0xcd
52
53/* Maximum register */
54#define TPS6586X_MAX_REGISTER TPS6586X_VERSIONCRC
55
56struct tps6586x_irq_data {
57 u8 mask_reg;
58 u8 mask_mask;
59};
60
61#define TPS6586X_IRQ(_reg, _mask) \
62 { \
63 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \
64 .mask_mask = (_mask), \
65 }
66
67static const struct tps6586x_irq_data tps6586x_irqs[] = {
68 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
69 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
70 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
71 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
72 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
73 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
74 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
75 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
76 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
77 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
78 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
79 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
80 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
81 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
82 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
83 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
84 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
85 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
86 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
87 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
88 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
89 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
90 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
91 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
92 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
93 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
94 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
95};
96
97static const struct resource tps6586x_rtc_resources[] = {
98 {
99 .start = TPS6586X_INT_RTC_ALM1,
100 .end = TPS6586X_INT_RTC_ALM1,
101 .flags = IORESOURCE_IRQ,
102 },
103};
104
105static const struct mfd_cell tps6586x_cell[] = {
106 {
107 .name = "tps6586x-gpio",
108 },
109 {
110 .name = "tps6586x-regulator",
111 },
112 {
113 .name = "tps6586x-rtc",
114 .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
115 .resources = &tps6586x_rtc_resources[0],
116 },
117 {
118 .name = "tps6586x-onkey",
119 },
120};
121
122struct tps6586x {
123 struct device *dev;
124 struct i2c_client *client;
125 struct regmap *regmap;
126 int version;
127
128 int irq;
129 struct irq_chip irq_chip;
130 struct mutex irq_lock;
131 int irq_base;
132 u32 irq_en;
133 u8 mask_reg[5];
134 struct irq_domain *irq_domain;
135};
136
137static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
138{
139 return i2c_get_clientdata(to_i2c_client(dev));
140}
141
142int tps6586x_write(struct device *dev, int reg, uint8_t val)
143{
144 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
145
146 return regmap_write(tps6586x->regmap, reg, val);
147}
148EXPORT_SYMBOL_GPL(tps6586x_write);
149
150int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
151{
152 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
153
154 return regmap_bulk_write(tps6586x->regmap, reg, val, len);
155}
156EXPORT_SYMBOL_GPL(tps6586x_writes);
157
158int tps6586x_read(struct device *dev, int reg, uint8_t *val)
159{
160 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
161 unsigned int rval;
162 int ret;
163
164 ret = regmap_read(tps6586x->regmap, reg, &rval);
165 if (!ret)
166 *val = rval;
167 return ret;
168}
169EXPORT_SYMBOL_GPL(tps6586x_read);
170
171int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
172{
173 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
174
175 return regmap_bulk_read(tps6586x->regmap, reg, val, len);
176}
177EXPORT_SYMBOL_GPL(tps6586x_reads);
178
179int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
180{
181 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
182
183 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
184}
185EXPORT_SYMBOL_GPL(tps6586x_set_bits);
186
187int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
188{
189 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
190
191 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
192}
193EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
194
195int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
196{
197 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
198
199 return regmap_update_bits(tps6586x->regmap, reg, mask, val);
200}
201EXPORT_SYMBOL_GPL(tps6586x_update);
202
203int tps6586x_irq_get_virq(struct device *dev, int irq)
204{
205 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
206
207 return irq_create_mapping(tps6586x->irq_domain, irq);
208}
209EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
210
211int tps6586x_get_version(struct device *dev)
212{
213 struct tps6586x *tps6586x = dev_get_drvdata(dev);
214
215 return tps6586x->version;
216}
217EXPORT_SYMBOL_GPL(tps6586x_get_version);
218
219static int __remove_subdev(struct device *dev, void *unused)
220{
221 platform_device_unregister(to_platform_device(dev));
222 return 0;
223}
224
225static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
226{
227 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
228}
229
230static void tps6586x_irq_lock(struct irq_data *data)
231{
232 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
233
234 mutex_lock(&tps6586x->irq_lock);
235}
236
237static void tps6586x_irq_enable(struct irq_data *irq_data)
238{
239 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
240 unsigned int __irq = irq_data->hwirq;
241 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
242
243 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
244 tps6586x->irq_en |= (1 << __irq);
245}
246
247static void tps6586x_irq_disable(struct irq_data *irq_data)
248{
249 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
250
251 unsigned int __irq = irq_data->hwirq;
252 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
253
254 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
255 tps6586x->irq_en &= ~(1 << __irq);
256}
257
258static void tps6586x_irq_sync_unlock(struct irq_data *data)
259{
260 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
261 int i;
262
263 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
264 int ret;
265 ret = tps6586x_write(tps6586x->dev,
266 TPS6586X_INT_MASK1 + i,
267 tps6586x->mask_reg[i]);
268 WARN_ON(ret);
269 }
270
271 mutex_unlock(&tps6586x->irq_lock);
272}
273
274static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
275{
276 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
277 return irq_set_irq_wake(tps6586x->irq, on);
278}
279
280static struct irq_chip tps6586x_irq_chip = {
281 .name = "tps6586x",
282 .irq_bus_lock = tps6586x_irq_lock,
283 .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
284 .irq_disable = tps6586x_irq_disable,
285 .irq_enable = tps6586x_irq_enable,
286 .irq_set_wake = pm_sleep_ptr(tps6586x_irq_set_wake),
287};
288
289static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
290 irq_hw_number_t hw)
291{
292 struct tps6586x *tps6586x = h->host_data;
293
294 irq_set_chip_data(virq, tps6586x);
295 irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
296 irq_set_nested_thread(virq, 1);
297 irq_set_noprobe(virq);
298
299 return 0;
300}
301
302static const struct irq_domain_ops tps6586x_domain_ops = {
303 .map = tps6586x_irq_map,
304 .xlate = irq_domain_xlate_twocell,
305};
306
307static irqreturn_t tps6586x_irq(int irq, void *data)
308{
309 struct tps6586x *tps6586x = data;
310 uint32_t acks;
311 __le32 val;
312 int ret = 0;
313
314 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
315 sizeof(acks), (uint8_t *)&val);
316
317 if (ret < 0) {
318 dev_err(tps6586x->dev, "failed to read interrupt status\n");
319 return IRQ_NONE;
320 }
321
322 acks = le32_to_cpu(val);
323
324 while (acks) {
325 int i = __ffs(acks);
326
327 if (tps6586x->irq_en & (1 << i))
328 handle_nested_irq(
329 irq_find_mapping(tps6586x->irq_domain, i));
330
331 acks &= ~(1 << i);
332 }
333
334 return IRQ_HANDLED;
335}
336
337static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
338 int irq_base)
339{
340 int i, ret;
341 u8 tmp[4];
342 int new_irq_base;
343 int irq_num = ARRAY_SIZE(tps6586x_irqs);
344
345 tps6586x->irq = irq;
346
347 mutex_init(&tps6586x->irq_lock);
348 for (i = 0; i < 5; i++) {
349 tps6586x->mask_reg[i] = 0xff;
350 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
351 }
352
353 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
354
355 if (irq_base > 0) {
356 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
357 if (new_irq_base < 0) {
358 dev_err(tps6586x->dev,
359 "Failed to alloc IRQs: %d\n", new_irq_base);
360 return new_irq_base;
361 }
362 } else {
363 new_irq_base = 0;
364 }
365
366 tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
367 irq_num, new_irq_base, &tps6586x_domain_ops,
368 tps6586x);
369 if (!tps6586x->irq_domain) {
370 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
371 return -ENOMEM;
372 }
373 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
374 "tps6586x", tps6586x);
375
376 if (!ret)
377 device_init_wakeup(tps6586x->dev, 1);
378
379 return ret;
380}
381
382static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
383 struct tps6586x_platform_data *pdata)
384{
385 struct tps6586x_subdev_info *subdev;
386 struct platform_device *pdev;
387 int i, ret = 0;
388
389 for (i = 0; i < pdata->num_subdevs; i++) {
390 subdev = &pdata->subdevs[i];
391
392 pdev = platform_device_alloc(subdev->name, subdev->id);
393 if (!pdev) {
394 ret = -ENOMEM;
395 goto failed;
396 }
397
398 pdev->dev.parent = tps6586x->dev;
399 pdev->dev.platform_data = subdev->platform_data;
400 pdev->dev.of_node = subdev->of_node;
401
402 ret = platform_device_add(pdev);
403 if (ret) {
404 platform_device_put(pdev);
405 goto failed;
406 }
407 }
408 return 0;
409
410failed:
411 tps6586x_remove_subdevs(tps6586x);
412 return ret;
413}
414
415#ifdef CONFIG_OF
416static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
417{
418 struct device_node *np = client->dev.of_node;
419 struct tps6586x_platform_data *pdata;
420
421 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
422 if (!pdata)
423 return NULL;
424
425 pdata->num_subdevs = 0;
426 pdata->subdevs = NULL;
427 pdata->gpio_base = -1;
428 pdata->irq_base = -1;
429 pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
430
431 return pdata;
432}
433
434static const struct of_device_id tps6586x_of_match[] = {
435 { .compatible = "ti,tps6586x", },
436 { },
437};
438#else
439static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
440{
441 return NULL;
442}
443#endif
444
445static bool is_volatile_reg(struct device *dev, unsigned int reg)
446{
447 /* Cache all interrupt mask register */
448 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
449 return false;
450
451 return true;
452}
453
454static const struct regmap_config tps6586x_regmap_config = {
455 .reg_bits = 8,
456 .val_bits = 8,
457 .max_register = TPS6586X_MAX_REGISTER,
458 .volatile_reg = is_volatile_reg,
459 .cache_type = REGCACHE_MAPLE,
460};
461
462static int tps6586x_power_off_handler(struct sys_off_data *data)
463{
464 int ret;
465
466 /* Put the PMIC into sleep state. This takes at least 20ms. */
467 ret = tps6586x_clr_bits(data->dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT);
468 if (ret)
469 return notifier_from_errno(ret);
470
471 ret = tps6586x_set_bits(data->dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
472 if (ret)
473 return notifier_from_errno(ret);
474
475 mdelay(50);
476 return notifier_from_errno(-ETIME);
477}
478
479static int tps6586x_restart_handler(struct sys_off_data *data)
480{
481 int ret;
482
483 /* Put the PMIC into hard reboot state. This takes at least 20ms. */
484 ret = tps6586x_set_bits(data->dev, TPS6586X_SUPPLYENE, SOFT_RST_BIT);
485 if (ret)
486 return notifier_from_errno(ret);
487
488 mdelay(50);
489 return notifier_from_errno(-ETIME);
490}
491
492static void tps6586x_print_version(struct i2c_client *client, int version)
493{
494 const char *name;
495
496 switch (version) {
497 case TPS658621A:
498 name = "TPS658621A";
499 break;
500 case TPS658621CD:
501 name = "TPS658621C/D";
502 break;
503 case TPS658623:
504 name = "TPS658623";
505 break;
506 case TPS658640:
507 case TPS658640v2:
508 name = "TPS658640";
509 break;
510 case TPS658643:
511 name = "TPS658643";
512 break;
513 default:
514 name = "TPS6586X";
515 break;
516 }
517
518 dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
519}
520
521static int tps6586x_i2c_probe(struct i2c_client *client)
522{
523 struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
524 struct tps6586x *tps6586x;
525 int ret;
526 int version;
527
528 if (!pdata && client->dev.of_node)
529 pdata = tps6586x_parse_dt(client);
530
531 if (!pdata) {
532 dev_err(&client->dev, "tps6586x requires platform data\n");
533 return -ENOTSUPP;
534 }
535
536 version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
537 if (version < 0) {
538 dev_err(&client->dev, "Chip ID read failed: %d\n", version);
539 return -EIO;
540 }
541
542 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
543 if (!tps6586x)
544 return -ENOMEM;
545
546 tps6586x->version = version;
547 tps6586x_print_version(client, tps6586x->version);
548
549 tps6586x->client = client;
550 tps6586x->dev = &client->dev;
551 i2c_set_clientdata(client, tps6586x);
552
553 tps6586x->regmap = devm_regmap_init_i2c(client,
554 &tps6586x_regmap_config);
555 if (IS_ERR(tps6586x->regmap)) {
556 ret = PTR_ERR(tps6586x->regmap);
557 dev_err(&client->dev, "regmap init failed: %d\n", ret);
558 return ret;
559 }
560
561
562 if (client->irq) {
563 ret = tps6586x_irq_init(tps6586x, client->irq,
564 pdata->irq_base);
565 if (ret) {
566 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
567 return ret;
568 }
569 }
570
571 ret = mfd_add_devices(tps6586x->dev, -1,
572 tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
573 NULL, 0, tps6586x->irq_domain);
574 if (ret < 0) {
575 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
576 goto err_mfd_add;
577 }
578
579 ret = tps6586x_add_subdevs(tps6586x, pdata);
580 if (ret) {
581 dev_err(&client->dev, "add devices failed: %d\n", ret);
582 goto err_add_devs;
583 }
584
585 if (pdata->pm_off) {
586 ret = devm_register_power_off_handler(&client->dev, &tps6586x_power_off_handler,
587 NULL);
588 if (ret) {
589 dev_err(&client->dev, "register power off handler failed: %d\n", ret);
590 goto err_add_devs;
591 }
592
593 ret = devm_register_restart_handler(&client->dev, &tps6586x_restart_handler,
594 NULL);
595 if (ret) {
596 dev_err(&client->dev, "register restart handler failed: %d\n", ret);
597 goto err_add_devs;
598 }
599 }
600
601 return 0;
602
603err_add_devs:
604 mfd_remove_devices(tps6586x->dev);
605err_mfd_add:
606 if (client->irq)
607 free_irq(client->irq, tps6586x);
608 return ret;
609}
610
611static void tps6586x_i2c_remove(struct i2c_client *client)
612{
613 struct tps6586x *tps6586x = i2c_get_clientdata(client);
614
615 tps6586x_remove_subdevs(tps6586x);
616 mfd_remove_devices(tps6586x->dev);
617 if (client->irq)
618 free_irq(client->irq, tps6586x);
619}
620
621static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
622{
623 struct tps6586x *tps6586x = dev_get_drvdata(dev);
624
625 if (tps6586x->client->irq)
626 disable_irq(tps6586x->client->irq);
627
628 return 0;
629}
630
631static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
632{
633 struct tps6586x *tps6586x = dev_get_drvdata(dev);
634
635 if (tps6586x->client->irq)
636 enable_irq(tps6586x->client->irq);
637
638 return 0;
639}
640
641static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
642 tps6586x_i2c_resume);
643
644static const struct i2c_device_id tps6586x_id_table[] = {
645 { "tps6586x", 0 },
646 { },
647};
648MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
649
650static struct i2c_driver tps6586x_driver = {
651 .driver = {
652 .name = "tps6586x",
653 .of_match_table = of_match_ptr(tps6586x_of_match),
654 .pm = &tps6586x_pm_ops,
655 },
656 .probe = tps6586x_i2c_probe,
657 .remove = tps6586x_i2c_remove,
658 .id_table = tps6586x_id_table,
659};
660
661static int __init tps6586x_init(void)
662{
663 return i2c_add_driver(&tps6586x_driver);
664}
665subsys_initcall(tps6586x_init);
666
667static void __exit tps6586x_exit(void)
668{
669 i2c_del_driver(&tps6586x_driver);
670}
671module_exit(tps6586x_exit);
672
673MODULE_DESCRIPTION("TPS6586X core driver");
674MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");