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18#include <linux/interrupt.h>
19#include <linux/irq.h>
20#include <linux/irqdomain.h>
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/mutex.h>
24#include <linux/slab.h>
25#include <linux/err.h>
26#include <linux/i2c.h>
27#include <linux/platform_device.h>
28#include <linux/regmap.h>
29
30#include <linux/mfd/core.h>
31#include <linux/mfd/tps6586x.h>
32
33#define TPS6586X_SUPPLYENE 0x14
34#define EXITSLREQ_BIT BIT(1)
35#define SLEEP_MODE_BIT BIT(3)
36
37
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
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
51#define TPS6586X_VERSIONCRC 0xcd
52
53
54#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
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 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 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
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
209static int __remove_subdev(struct device *dev, void *unused)
210{
211 platform_device_unregister(to_platform_device(dev));
212 return 0;
213}
214
215static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
216{
217 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
218}
219
220static void tps6586x_irq_lock(struct irq_data *data)
221{
222 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
223
224 mutex_lock(&tps6586x->irq_lock);
225}
226
227static void tps6586x_irq_enable(struct irq_data *irq_data)
228{
229 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
230 unsigned int __irq = irq_data->hwirq;
231 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
232
233 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
234 tps6586x->irq_en |= (1 << __irq);
235}
236
237static void tps6586x_irq_disable(struct irq_data *irq_data)
238{
239 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
240
241 unsigned int __irq = irq_data->hwirq;
242 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
243
244 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
245 tps6586x->irq_en &= ~(1 << __irq);
246}
247
248static void tps6586x_irq_sync_unlock(struct irq_data *data)
249{
250 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
251 int i;
252
253 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
254 int ret;
255 ret = tps6586x_write(tps6586x->dev,
256 TPS6586X_INT_MASK1 + i,
257 tps6586x->mask_reg[i]);
258 WARN_ON(ret);
259 }
260
261 mutex_unlock(&tps6586x->irq_lock);
262}
263
264static struct irq_chip tps6586x_irq_chip = {
265 .name = "tps6586x",
266 .irq_bus_lock = tps6586x_irq_lock,
267 .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
268 .irq_disable = tps6586x_irq_disable,
269 .irq_enable = tps6586x_irq_enable,
270};
271
272static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
273 irq_hw_number_t hw)
274{
275 struct tps6586x *tps6586x = h->host_data;
276
277 irq_set_chip_data(virq, tps6586x);
278 irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
279 irq_set_nested_thread(virq, 1);
280
281
282
283#ifdef CONFIG_ARM
284 set_irq_flags(virq, IRQF_VALID);
285#else
286 irq_set_noprobe(virq);
287#endif
288
289 return 0;
290}
291
292static struct irq_domain_ops tps6586x_domain_ops = {
293 .map = tps6586x_irq_map,
294 .xlate = irq_domain_xlate_twocell,
295};
296
297static irqreturn_t tps6586x_irq(int irq, void *data)
298{
299 struct tps6586x *tps6586x = data;
300 u32 acks;
301 int ret = 0;
302
303 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
304 sizeof(acks), (uint8_t *)&acks);
305
306 if (ret < 0) {
307 dev_err(tps6586x->dev, "failed to read interrupt status\n");
308 return IRQ_NONE;
309 }
310
311 acks = le32_to_cpu(acks);
312
313 while (acks) {
314 int i = __ffs(acks);
315
316 if (tps6586x->irq_en & (1 << i))
317 handle_nested_irq(
318 irq_find_mapping(tps6586x->irq_domain, i));
319
320 acks &= ~(1 << i);
321 }
322
323 return IRQ_HANDLED;
324}
325
326static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
327 int irq_base)
328{
329 int i, ret;
330 u8 tmp[4];
331 int new_irq_base;
332 int irq_num = ARRAY_SIZE(tps6586x_irqs);
333
334 mutex_init(&tps6586x->irq_lock);
335 for (i = 0; i < 5; i++) {
336 tps6586x->mask_reg[i] = 0xff;
337 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
338 }
339
340 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
341
342 if (irq_base > 0) {
343 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
344 if (new_irq_base < 0) {
345 dev_err(tps6586x->dev,
346 "Failed to alloc IRQs: %d\n", new_irq_base);
347 return new_irq_base;
348 }
349 } else {
350 new_irq_base = 0;
351 }
352
353 tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
354 irq_num, new_irq_base, &tps6586x_domain_ops,
355 tps6586x);
356 if (!tps6586x->irq_domain) {
357 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
358 return -ENOMEM;
359 }
360 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
361 "tps6586x", tps6586x);
362
363 if (!ret) {
364 device_init_wakeup(tps6586x->dev, 1);
365 enable_irq_wake(irq);
366 }
367
368 return ret;
369}
370
371static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
372 struct tps6586x_platform_data *pdata)
373{
374 struct tps6586x_subdev_info *subdev;
375 struct platform_device *pdev;
376 int i, ret = 0;
377
378 for (i = 0; i < pdata->num_subdevs; i++) {
379 subdev = &pdata->subdevs[i];
380
381 pdev = platform_device_alloc(subdev->name, subdev->id);
382 if (!pdev) {
383 ret = -ENOMEM;
384 goto failed;
385 }
386
387 pdev->dev.parent = tps6586x->dev;
388 pdev->dev.platform_data = subdev->platform_data;
389 pdev->dev.of_node = subdev->of_node;
390
391 ret = platform_device_add(pdev);
392 if (ret) {
393 platform_device_put(pdev);
394 goto failed;
395 }
396 }
397 return 0;
398
399failed:
400 tps6586x_remove_subdevs(tps6586x);
401 return ret;
402}
403
404#ifdef CONFIG_OF
405static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
406{
407 struct device_node *np = client->dev.of_node;
408 struct tps6586x_platform_data *pdata;
409
410 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
411 if (!pdata) {
412 dev_err(&client->dev, "Memory allocation failed\n");
413 return NULL;
414 }
415
416 pdata->num_subdevs = 0;
417 pdata->subdevs = NULL;
418 pdata->gpio_base = -1;
419 pdata->irq_base = -1;
420 pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
421
422 return pdata;
423}
424
425static struct of_device_id tps6586x_of_match[] = {
426 { .compatible = "ti,tps6586x", },
427 { },
428};
429#else
430static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
431{
432 return NULL;
433}
434#endif
435
436static bool is_volatile_reg(struct device *dev, unsigned int reg)
437{
438
439 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
440 return false;
441
442 return true;
443}
444
445static const struct regmap_config tps6586x_regmap_config = {
446 .reg_bits = 8,
447 .val_bits = 8,
448 .max_register = TPS6586X_MAX_REGISTER - 1,
449 .volatile_reg = is_volatile_reg,
450 .cache_type = REGCACHE_RBTREE,
451};
452
453static struct device *tps6586x_dev;
454static void tps6586x_power_off(void)
455{
456 if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
457 return;
458
459 tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
460}
461
462static int tps6586x_i2c_probe(struct i2c_client *client,
463 const struct i2c_device_id *id)
464{
465 struct tps6586x_platform_data *pdata = client->dev.platform_data;
466 struct tps6586x *tps6586x;
467 int ret;
468
469 if (!pdata && client->dev.of_node)
470 pdata = tps6586x_parse_dt(client);
471
472 if (!pdata) {
473 dev_err(&client->dev, "tps6586x requires platform data\n");
474 return -ENOTSUPP;
475 }
476
477 ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
478 if (ret < 0) {
479 dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
480 return -EIO;
481 }
482
483 dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
484
485 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
486 if (tps6586x == NULL) {
487 dev_err(&client->dev, "memory for tps6586x alloc failed\n");
488 return -ENOMEM;
489 }
490
491 tps6586x->client = client;
492 tps6586x->dev = &client->dev;
493 i2c_set_clientdata(client, tps6586x);
494
495 tps6586x->regmap = devm_regmap_init_i2c(client,
496 &tps6586x_regmap_config);
497 if (IS_ERR(tps6586x->regmap)) {
498 ret = PTR_ERR(tps6586x->regmap);
499 dev_err(&client->dev, "regmap init failed: %d\n", ret);
500 return ret;
501 }
502
503
504 if (client->irq) {
505 ret = tps6586x_irq_init(tps6586x, client->irq,
506 pdata->irq_base);
507 if (ret) {
508 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
509 return ret;
510 }
511 }
512
513 ret = mfd_add_devices(tps6586x->dev, -1,
514 tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
515 NULL, 0, tps6586x->irq_domain);
516 if (ret < 0) {
517 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
518 goto err_mfd_add;
519 }
520
521 ret = tps6586x_add_subdevs(tps6586x, pdata);
522 if (ret) {
523 dev_err(&client->dev, "add devices failed: %d\n", ret);
524 goto err_add_devs;
525 }
526
527 if (pdata->pm_off && !pm_power_off) {
528 tps6586x_dev = &client->dev;
529 pm_power_off = tps6586x_power_off;
530 }
531
532 return 0;
533
534err_add_devs:
535 mfd_remove_devices(tps6586x->dev);
536err_mfd_add:
537 if (client->irq)
538 free_irq(client->irq, tps6586x);
539 return ret;
540}
541
542static int tps6586x_i2c_remove(struct i2c_client *client)
543{
544 struct tps6586x *tps6586x = i2c_get_clientdata(client);
545
546 tps6586x_remove_subdevs(tps6586x);
547 mfd_remove_devices(tps6586x->dev);
548 if (client->irq)
549 free_irq(client->irq, tps6586x);
550 return 0;
551}
552
553static const struct i2c_device_id tps6586x_id_table[] = {
554 { "tps6586x", 0 },
555 { },
556};
557MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
558
559static struct i2c_driver tps6586x_driver = {
560 .driver = {
561 .name = "tps6586x",
562 .owner = THIS_MODULE,
563 .of_match_table = of_match_ptr(tps6586x_of_match),
564 },
565 .probe = tps6586x_i2c_probe,
566 .remove = tps6586x_i2c_remove,
567 .id_table = tps6586x_id_table,
568};
569
570static int __init tps6586x_init(void)
571{
572 return i2c_add_driver(&tps6586x_driver);
573}
574subsys_initcall(tps6586x_init);
575
576static void __exit tps6586x_exit(void)
577{
578 i2c_del_driver(&tps6586x_driver);
579}
580module_exit(tps6586x_exit);
581
582MODULE_DESCRIPTION("TPS6586X core driver");
583MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
584MODULE_LICENSE("GPL");
585
