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22#include <linux/regmap.h>
23#include <linux/i2c.h>
24#include <linux/init.h>
25#include <linux/interrupt.h>
26#include <linux/irq.h>
27#include <linux/mutex.h>
28#include <linux/slab.h>
29#include <linux/of.h>
30#include <linux/of_device.h>
31#include <linux/gpio/driver.h>
32#include <linux/pinctrl/pinconf.h>
33#include <linux/pinctrl/pinctrl.h>
34#include <linux/pinctrl/pinmux.h>
35#include <linux/pinctrl/pinconf-generic.h>
36
37#include "core.h"
38#include "pinconf.h"
39#include "pinctrl-utils.h"
40
41
42enum {
43 SX150X_123 = 0,
44 SX150X_456,
45 SX150X_789,
46};
47enum {
48 SX150X_789_REG_MISC_AUTOCLEAR_OFF = 1 << 0,
49 SX150X_MAX_REGISTER = 0xad,
50 SX150X_IRQ_TYPE_EDGE_RISING = 0x1,
51 SX150X_IRQ_TYPE_EDGE_FALLING = 0x2,
52 SX150X_789_RESET_KEY1 = 0x12,
53 SX150X_789_RESET_KEY2 = 0x34,
54};
55
56struct sx150x_123_pri {
57 u8 reg_pld_mode;
58 u8 reg_pld_table0;
59 u8 reg_pld_table1;
60 u8 reg_pld_table2;
61 u8 reg_pld_table3;
62 u8 reg_pld_table4;
63 u8 reg_advanced;
64};
65
66struct sx150x_456_pri {
67 u8 reg_pld_mode;
68 u8 reg_pld_table0;
69 u8 reg_pld_table1;
70 u8 reg_pld_table2;
71 u8 reg_pld_table3;
72 u8 reg_pld_table4;
73 u8 reg_advanced;
74};
75
76struct sx150x_789_pri {
77 u8 reg_drain;
78 u8 reg_polarity;
79 u8 reg_clock;
80 u8 reg_misc;
81 u8 reg_reset;
82 u8 ngpios;
83};
84
85struct sx150x_device_data {
86 u8 model;
87 u8 reg_pullup;
88 u8 reg_pulldn;
89 u8 reg_dir;
90 u8 reg_data;
91 u8 reg_irq_mask;
92 u8 reg_irq_src;
93 u8 reg_sense;
94 u8 ngpios;
95 union {
96 struct sx150x_123_pri x123;
97 struct sx150x_456_pri x456;
98 struct sx150x_789_pri x789;
99 } pri;
100 const struct pinctrl_pin_desc *pins;
101 unsigned int npins;
102};
103
104struct sx150x_pinctrl {
105 struct device *dev;
106 struct i2c_client *client;
107 struct pinctrl_dev *pctldev;
108 struct pinctrl_desc pinctrl_desc;
109 struct gpio_chip gpio;
110 struct irq_chip irq_chip;
111 struct regmap *regmap;
112 struct {
113 u32 sense;
114 u32 masked;
115 } irq;
116 struct mutex lock;
117 const struct sx150x_device_data *data;
118};
119
120static const struct pinctrl_pin_desc sx150x_4_pins[] = {
121 PINCTRL_PIN(0, "gpio0"),
122 PINCTRL_PIN(1, "gpio1"),
123 PINCTRL_PIN(2, "gpio2"),
124 PINCTRL_PIN(3, "gpio3"),
125 PINCTRL_PIN(4, "oscio"),
126};
127
128static const struct pinctrl_pin_desc sx150x_8_pins[] = {
129 PINCTRL_PIN(0, "gpio0"),
130 PINCTRL_PIN(1, "gpio1"),
131 PINCTRL_PIN(2, "gpio2"),
132 PINCTRL_PIN(3, "gpio3"),
133 PINCTRL_PIN(4, "gpio4"),
134 PINCTRL_PIN(5, "gpio5"),
135 PINCTRL_PIN(6, "gpio6"),
136 PINCTRL_PIN(7, "gpio7"),
137 PINCTRL_PIN(8, "oscio"),
138};
139
140static const struct pinctrl_pin_desc sx150x_16_pins[] = {
141 PINCTRL_PIN(0, "gpio0"),
142 PINCTRL_PIN(1, "gpio1"),
143 PINCTRL_PIN(2, "gpio2"),
144 PINCTRL_PIN(3, "gpio3"),
145 PINCTRL_PIN(4, "gpio4"),
146 PINCTRL_PIN(5, "gpio5"),
147 PINCTRL_PIN(6, "gpio6"),
148 PINCTRL_PIN(7, "gpio7"),
149 PINCTRL_PIN(8, "gpio8"),
150 PINCTRL_PIN(9, "gpio9"),
151 PINCTRL_PIN(10, "gpio10"),
152 PINCTRL_PIN(11, "gpio11"),
153 PINCTRL_PIN(12, "gpio12"),
154 PINCTRL_PIN(13, "gpio13"),
155 PINCTRL_PIN(14, "gpio14"),
156 PINCTRL_PIN(15, "gpio15"),
157 PINCTRL_PIN(16, "oscio"),
158};
159
160static const struct sx150x_device_data sx1501q_device_data = {
161 .model = SX150X_123,
162 .reg_pullup = 0x02,
163 .reg_pulldn = 0x03,
164 .reg_dir = 0x01,
165 .reg_data = 0x00,
166 .reg_irq_mask = 0x05,
167 .reg_irq_src = 0x08,
168 .reg_sense = 0x07,
169 .pri.x123 = {
170 .reg_pld_mode = 0x10,
171 .reg_pld_table0 = 0x11,
172 .reg_pld_table2 = 0x13,
173 .reg_advanced = 0xad,
174 },
175 .ngpios = 4,
176 .pins = sx150x_4_pins,
177 .npins = 4,
178};
179
180static const struct sx150x_device_data sx1502q_device_data = {
181 .model = SX150X_123,
182 .reg_pullup = 0x02,
183 .reg_pulldn = 0x03,
184 .reg_dir = 0x01,
185 .reg_data = 0x00,
186 .reg_irq_mask = 0x05,
187 .reg_irq_src = 0x08,
188 .reg_sense = 0x06,
189 .pri.x123 = {
190 .reg_pld_mode = 0x10,
191 .reg_pld_table0 = 0x11,
192 .reg_pld_table1 = 0x12,
193 .reg_pld_table2 = 0x13,
194 .reg_pld_table3 = 0x14,
195 .reg_pld_table4 = 0x15,
196 .reg_advanced = 0xad,
197 },
198 .ngpios = 8,
199 .pins = sx150x_8_pins,
200 .npins = 8,
201};
202
203static const struct sx150x_device_data sx1503q_device_data = {
204 .model = SX150X_123,
205 .reg_pullup = 0x04,
206 .reg_pulldn = 0x06,
207 .reg_dir = 0x02,
208 .reg_data = 0x00,
209 .reg_irq_mask = 0x08,
210 .reg_irq_src = 0x0e,
211 .reg_sense = 0x0a,
212 .pri.x123 = {
213 .reg_pld_mode = 0x20,
214 .reg_pld_table0 = 0x22,
215 .reg_pld_table1 = 0x24,
216 .reg_pld_table2 = 0x26,
217 .reg_pld_table3 = 0x28,
218 .reg_pld_table4 = 0x2a,
219 .reg_advanced = 0xad,
220 },
221 .ngpios = 16,
222 .pins = sx150x_16_pins,
223 .npins = 16,
224};
225
226static const struct sx150x_device_data sx1504q_device_data = {
227 .model = SX150X_456,
228 .reg_pullup = 0x02,
229 .reg_pulldn = 0x03,
230 .reg_dir = 0x01,
231 .reg_data = 0x00,
232 .reg_irq_mask = 0x05,
233 .reg_irq_src = 0x08,
234 .reg_sense = 0x07,
235 .pri.x456 = {
236 .reg_pld_mode = 0x10,
237 .reg_pld_table0 = 0x11,
238 .reg_pld_table2 = 0x13,
239 },
240 .ngpios = 4,
241 .pins = sx150x_4_pins,
242 .npins = 4,
243};
244
245static const struct sx150x_device_data sx1505q_device_data = {
246 .model = SX150X_456,
247 .reg_pullup = 0x02,
248 .reg_pulldn = 0x03,
249 .reg_dir = 0x01,
250 .reg_data = 0x00,
251 .reg_irq_mask = 0x05,
252 .reg_irq_src = 0x08,
253 .reg_sense = 0x06,
254 .pri.x456 = {
255 .reg_pld_mode = 0x10,
256 .reg_pld_table0 = 0x11,
257 .reg_pld_table1 = 0x12,
258 .reg_pld_table2 = 0x13,
259 .reg_pld_table3 = 0x14,
260 .reg_pld_table4 = 0x15,
261 },
262 .ngpios = 8,
263 .pins = sx150x_8_pins,
264 .npins = 8,
265};
266
267static const struct sx150x_device_data sx1506q_device_data = {
268 .model = SX150X_456,
269 .reg_pullup = 0x04,
270 .reg_pulldn = 0x06,
271 .reg_dir = 0x02,
272 .reg_data = 0x00,
273 .reg_irq_mask = 0x08,
274 .reg_irq_src = 0x0e,
275 .reg_sense = 0x0a,
276 .pri.x456 = {
277 .reg_pld_mode = 0x20,
278 .reg_pld_table0 = 0x22,
279 .reg_pld_table1 = 0x24,
280 .reg_pld_table2 = 0x26,
281 .reg_pld_table3 = 0x28,
282 .reg_pld_table4 = 0x2a,
283 .reg_advanced = 0xad,
284 },
285 .ngpios = 16,
286 .pins = sx150x_16_pins,
287 .npins = 16,
288};
289
290static const struct sx150x_device_data sx1507q_device_data = {
291 .model = SX150X_789,
292 .reg_pullup = 0x03,
293 .reg_pulldn = 0x04,
294 .reg_dir = 0x07,
295 .reg_data = 0x08,
296 .reg_irq_mask = 0x09,
297 .reg_irq_src = 0x0b,
298 .reg_sense = 0x0a,
299 .pri.x789 = {
300 .reg_drain = 0x05,
301 .reg_polarity = 0x06,
302 .reg_clock = 0x0d,
303 .reg_misc = 0x0e,
304 .reg_reset = 0x7d,
305 },
306 .ngpios = 4,
307 .pins = sx150x_4_pins,
308 .npins = ARRAY_SIZE(sx150x_4_pins),
309};
310
311static const struct sx150x_device_data sx1508q_device_data = {
312 .model = SX150X_789,
313 .reg_pullup = 0x03,
314 .reg_pulldn = 0x04,
315 .reg_dir = 0x07,
316 .reg_data = 0x08,
317 .reg_irq_mask = 0x09,
318 .reg_irq_src = 0x0c,
319 .reg_sense = 0x0a,
320 .pri.x789 = {
321 .reg_drain = 0x05,
322 .reg_polarity = 0x06,
323 .reg_clock = 0x0f,
324 .reg_misc = 0x10,
325 .reg_reset = 0x7d,
326 },
327 .ngpios = 8,
328 .pins = sx150x_8_pins,
329 .npins = ARRAY_SIZE(sx150x_8_pins),
330};
331
332static const struct sx150x_device_data sx1509q_device_data = {
333 .model = SX150X_789,
334 .reg_pullup = 0x06,
335 .reg_pulldn = 0x08,
336 .reg_dir = 0x0e,
337 .reg_data = 0x10,
338 .reg_irq_mask = 0x12,
339 .reg_irq_src = 0x18,
340 .reg_sense = 0x14,
341 .pri.x789 = {
342 .reg_drain = 0x0a,
343 .reg_polarity = 0x0c,
344 .reg_clock = 0x1e,
345 .reg_misc = 0x1f,
346 .reg_reset = 0x7d,
347 },
348 .ngpios = 16,
349 .pins = sx150x_16_pins,
350 .npins = ARRAY_SIZE(sx150x_16_pins),
351};
352
353static int sx150x_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
354{
355 return 0;
356}
357
358static const char *sx150x_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
359 unsigned int group)
360{
361 return NULL;
362}
363
364static int sx150x_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
365 unsigned int group,
366 const unsigned int **pins,
367 unsigned int *num_pins)
368{
369 return -ENOTSUPP;
370}
371
372static const struct pinctrl_ops sx150x_pinctrl_ops = {
373 .get_groups_count = sx150x_pinctrl_get_groups_count,
374 .get_group_name = sx150x_pinctrl_get_group_name,
375 .get_group_pins = sx150x_pinctrl_get_group_pins,
376#ifdef CONFIG_OF
377 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
378 .dt_free_map = pinctrl_utils_free_map,
379#endif
380};
381
382static bool sx150x_pin_is_oscio(struct sx150x_pinctrl *pctl, unsigned int pin)
383{
384 if (pin >= pctl->data->npins)
385 return false;
386
387
388 if (pctl->data->model != SX150X_789)
389 return false;
390
391 return !strcmp(pctl->data->pins[pin].name, "oscio");
392}
393
394static int sx150x_gpio_get_direction(struct gpio_chip *chip,
395 unsigned int offset)
396{
397 struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
398 unsigned int value;
399 int ret;
400
401 if (sx150x_pin_is_oscio(pctl, offset))
402 return false;
403
404 ret = regmap_read(pctl->regmap, pctl->data->reg_dir, &value);
405 if (ret < 0)
406 return ret;
407
408 return !!(value & BIT(offset));
409}
410
411static int sx150x_gpio_get(struct gpio_chip *chip, unsigned int offset)
412{
413 struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
414 unsigned int value;
415 int ret;
416
417 if (sx150x_pin_is_oscio(pctl, offset))
418 return -EINVAL;
419
420 ret = regmap_read(pctl->regmap, pctl->data->reg_data, &value);
421 if (ret < 0)
422 return ret;
423
424 return !!(value & BIT(offset));
425}
426
427static int __sx150x_gpio_set(struct sx150x_pinctrl *pctl, unsigned int offset,
428 int value)
429{
430 return regmap_write_bits(pctl->regmap, pctl->data->reg_data,
431 BIT(offset), value ? BIT(offset) : 0);
432}
433
434static int sx150x_gpio_oscio_set(struct sx150x_pinctrl *pctl,
435 int value)
436{
437 return regmap_write(pctl->regmap,
438 pctl->data->pri.x789.reg_clock,
439 (value ? 0x1f : 0x10));
440}
441
442static void sx150x_gpio_set(struct gpio_chip *chip, unsigned int offset,
443 int value)
444{
445 struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
446
447 if (sx150x_pin_is_oscio(pctl, offset))
448 sx150x_gpio_oscio_set(pctl, value);
449 else
450 __sx150x_gpio_set(pctl, offset, value);
451
452}
453
454static void sx150x_gpio_set_multiple(struct gpio_chip *chip,
455 unsigned long *mask,
456 unsigned long *bits)
457{
458 struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
459
460 regmap_write_bits(pctl->regmap, pctl->data->reg_data, *mask, *bits);
461}
462
463static int sx150x_gpio_direction_input(struct gpio_chip *chip,
464 unsigned int offset)
465{
466 struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
467
468 if (sx150x_pin_is_oscio(pctl, offset))
469 return -EINVAL;
470
471 return regmap_write_bits(pctl->regmap,
472 pctl->data->reg_dir,
473 BIT(offset), BIT(offset));
474}
475
476static int sx150x_gpio_direction_output(struct gpio_chip *chip,
477 unsigned int offset, int value)
478{
479 struct sx150x_pinctrl *pctl = gpiochip_get_data(chip);
480 int ret;
481
482 if (sx150x_pin_is_oscio(pctl, offset))
483 return sx150x_gpio_oscio_set(pctl, value);
484
485 ret = __sx150x_gpio_set(pctl, offset, value);
486 if (ret < 0)
487 return ret;
488
489 return regmap_write_bits(pctl->regmap,
490 pctl->data->reg_dir,
491 BIT(offset), 0);
492}
493
494static void sx150x_irq_mask(struct irq_data *d)
495{
496 struct sx150x_pinctrl *pctl =
497 gpiochip_get_data(irq_data_get_irq_chip_data(d));
498 unsigned int n = d->hwirq;
499
500 pctl->irq.masked |= BIT(n);
501}
502
503static void sx150x_irq_unmask(struct irq_data *d)
504{
505 struct sx150x_pinctrl *pctl =
506 gpiochip_get_data(irq_data_get_irq_chip_data(d));
507 unsigned int n = d->hwirq;
508
509 pctl->irq.masked &= ~BIT(n);
510}
511
512static void sx150x_irq_set_sense(struct sx150x_pinctrl *pctl,
513 unsigned int line, unsigned int sense)
514{
515
516
517
518
519 const unsigned int n = line * 2;
520 const unsigned int mask = ~((SX150X_IRQ_TYPE_EDGE_RISING |
521 SX150X_IRQ_TYPE_EDGE_FALLING) << n);
522
523 pctl->irq.sense &= mask;
524 pctl->irq.sense |= sense << n;
525}
526
527static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type)
528{
529 struct sx150x_pinctrl *pctl =
530 gpiochip_get_data(irq_data_get_irq_chip_data(d));
531 unsigned int n, val = 0;
532
533 if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
534 return -EINVAL;
535
536 n = d->hwirq;
537
538 if (flow_type & IRQ_TYPE_EDGE_RISING)
539 val |= SX150X_IRQ_TYPE_EDGE_RISING;
540 if (flow_type & IRQ_TYPE_EDGE_FALLING)
541 val |= SX150X_IRQ_TYPE_EDGE_FALLING;
542
543 sx150x_irq_set_sense(pctl, n, val);
544 return 0;
545}
546
547static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id)
548{
549 struct sx150x_pinctrl *pctl = (struct sx150x_pinctrl *)dev_id;
550 unsigned long n, status;
551 unsigned int val;
552 int err;
553
554 err = regmap_read(pctl->regmap, pctl->data->reg_irq_src, &val);
555 if (err < 0)
556 return IRQ_NONE;
557
558 err = regmap_write(pctl->regmap, pctl->data->reg_irq_src, val);
559 if (err < 0)
560 return IRQ_NONE;
561
562 status = val;
563 for_each_set_bit(n, &status, pctl->data->ngpios)
564 handle_nested_irq(irq_find_mapping(pctl->gpio.irq.domain, n));
565
566 return IRQ_HANDLED;
567}
568
569static void sx150x_irq_bus_lock(struct irq_data *d)
570{
571 struct sx150x_pinctrl *pctl =
572 gpiochip_get_data(irq_data_get_irq_chip_data(d));
573
574 mutex_lock(&pctl->lock);
575}
576
577static void sx150x_irq_bus_sync_unlock(struct irq_data *d)
578{
579 struct sx150x_pinctrl *pctl =
580 gpiochip_get_data(irq_data_get_irq_chip_data(d));
581
582 regmap_write(pctl->regmap, pctl->data->reg_irq_mask, pctl->irq.masked);
583 regmap_write(pctl->regmap, pctl->data->reg_sense, pctl->irq.sense);
584 mutex_unlock(&pctl->lock);
585}
586
587static int sx150x_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
588 unsigned long *config)
589{
590 struct sx150x_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
591 unsigned int param = pinconf_to_config_param(*config);
592 int ret;
593 u32 arg;
594 unsigned int data;
595
596 if (sx150x_pin_is_oscio(pctl, pin)) {
597 switch (param) {
598 case PIN_CONFIG_DRIVE_PUSH_PULL:
599 case PIN_CONFIG_OUTPUT:
600 ret = regmap_read(pctl->regmap,
601 pctl->data->pri.x789.reg_clock,
602 &data);
603 if (ret < 0)
604 return ret;
605
606 if (param == PIN_CONFIG_DRIVE_PUSH_PULL)
607 arg = (data & 0x1f) ? 1 : 0;
608 else {
609 if ((data & 0x1f) == 0x1f)
610 arg = 1;
611 else if ((data & 0x1f) == 0x10)
612 arg = 0;
613 else
614 return -EINVAL;
615 }
616
617 break;
618 default:
619 return -ENOTSUPP;
620 }
621
622 goto out;
623 }
624
625 switch (param) {
626 case PIN_CONFIG_BIAS_PULL_DOWN:
627 ret = regmap_read(pctl->regmap,
628 pctl->data->reg_pulldn,
629 &data);
630 data &= BIT(pin);
631
632 if (ret < 0)
633 return ret;
634
635 if (!ret)
636 return -EINVAL;
637
638 arg = 1;
639 break;
640
641 case PIN_CONFIG_BIAS_PULL_UP:
642 ret = regmap_read(pctl->regmap,
643 pctl->data->reg_pullup,
644 &data);
645 data &= BIT(pin);
646
647 if (ret < 0)
648 return ret;
649
650 if (!ret)
651 return -EINVAL;
652
653 arg = 1;
654 break;
655
656 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
657 if (pctl->data->model != SX150X_789)
658 return -ENOTSUPP;
659
660 ret = regmap_read(pctl->regmap,
661 pctl->data->pri.x789.reg_drain,
662 &data);
663 data &= BIT(pin);
664
665 if (ret < 0)
666 return ret;
667
668 if (!data)
669 return -EINVAL;
670
671 arg = 1;
672 break;
673
674 case PIN_CONFIG_DRIVE_PUSH_PULL:
675 if (pctl->data->model != SX150X_789)
676 arg = true;
677 else {
678 ret = regmap_read(pctl->regmap,
679 pctl->data->pri.x789.reg_drain,
680 &data);
681 data &= BIT(pin);
682
683 if (ret < 0)
684 return ret;
685
686 if (data)
687 return -EINVAL;
688
689 arg = 1;
690 }
691 break;
692
693 case PIN_CONFIG_OUTPUT:
694 ret = sx150x_gpio_get_direction(&pctl->gpio, pin);
695 if (ret < 0)
696 return ret;
697
698 if (ret)
699 return -EINVAL;
700
701 ret = sx150x_gpio_get(&pctl->gpio, pin);
702 if (ret < 0)
703 return ret;
704
705 arg = ret;
706 break;
707
708 default:
709 return -ENOTSUPP;
710 }
711
712out:
713 *config = pinconf_to_config_packed(param, arg);
714
715 return 0;
716}
717
718static int sx150x_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
719 unsigned long *configs, unsigned int num_configs)
720{
721 struct sx150x_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
722 enum pin_config_param param;
723 u32 arg;
724 int i;
725 int ret;
726
727 for (i = 0; i < num_configs; i++) {
728 param = pinconf_to_config_param(configs[i]);
729 arg = pinconf_to_config_argument(configs[i]);
730
731 if (sx150x_pin_is_oscio(pctl, pin)) {
732 if (param == PIN_CONFIG_OUTPUT) {
733 ret = sx150x_gpio_direction_output(&pctl->gpio,
734 pin, arg);
735 if (ret < 0)
736 return ret;
737
738 continue;
739 } else
740 return -ENOTSUPP;
741 }
742
743 switch (param) {
744 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
745 case PIN_CONFIG_BIAS_DISABLE:
746 ret = regmap_write_bits(pctl->regmap,
747 pctl->data->reg_pulldn,
748 BIT(pin), 0);
749 if (ret < 0)
750 return ret;
751
752 ret = regmap_write_bits(pctl->regmap,
753 pctl->data->reg_pullup,
754 BIT(pin), 0);
755 if (ret < 0)
756 return ret;
757
758 break;
759
760 case PIN_CONFIG_BIAS_PULL_UP:
761 ret = regmap_write_bits(pctl->regmap,
762 pctl->data->reg_pullup,
763 BIT(pin), BIT(pin));
764 if (ret < 0)
765 return ret;
766
767 break;
768
769 case PIN_CONFIG_BIAS_PULL_DOWN:
770 ret = regmap_write_bits(pctl->regmap,
771 pctl->data->reg_pulldn,
772 BIT(pin), BIT(pin));
773 if (ret < 0)
774 return ret;
775
776 break;
777
778 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
779 if (pctl->data->model != SX150X_789 ||
780 sx150x_pin_is_oscio(pctl, pin))
781 return -ENOTSUPP;
782
783 ret = regmap_write_bits(pctl->regmap,
784 pctl->data->pri.x789.reg_drain,
785 BIT(pin), BIT(pin));
786 if (ret < 0)
787 return ret;
788
789 break;
790
791 case PIN_CONFIG_DRIVE_PUSH_PULL:
792 if (pctl->data->model != SX150X_789 ||
793 sx150x_pin_is_oscio(pctl, pin))
794 return 0;
795
796 ret = regmap_write_bits(pctl->regmap,
797 pctl->data->pri.x789.reg_drain,
798 BIT(pin), 0);
799 if (ret < 0)
800 return ret;
801
802 break;
803
804 case PIN_CONFIG_OUTPUT:
805 ret = sx150x_gpio_direction_output(&pctl->gpio,
806 pin, arg);
807 if (ret < 0)
808 return ret;
809
810 break;
811
812 default:
813 return -ENOTSUPP;
814 }
815 }
816
817 return 0;
818}
819
820static const struct pinconf_ops sx150x_pinconf_ops = {
821 .pin_config_get = sx150x_pinconf_get,
822 .pin_config_set = sx150x_pinconf_set,
823 .is_generic = true,
824};
825
826static const struct i2c_device_id sx150x_id[] = {
827 {"sx1501q", (kernel_ulong_t) &sx1501q_device_data },
828 {"sx1502q", (kernel_ulong_t) &sx1502q_device_data },
829 {"sx1503q", (kernel_ulong_t) &sx1503q_device_data },
830 {"sx1504q", (kernel_ulong_t) &sx1504q_device_data },
831 {"sx1505q", (kernel_ulong_t) &sx1505q_device_data },
832 {"sx1506q", (kernel_ulong_t) &sx1506q_device_data },
833 {"sx1507q", (kernel_ulong_t) &sx1507q_device_data },
834 {"sx1508q", (kernel_ulong_t) &sx1508q_device_data },
835 {"sx1509q", (kernel_ulong_t) &sx1509q_device_data },
836 {}
837};
838
839static const struct of_device_id sx150x_of_match[] = {
840 { .compatible = "semtech,sx1501q", .data = &sx1501q_device_data },
841 { .compatible = "semtech,sx1502q", .data = &sx1502q_device_data },
842 { .compatible = "semtech,sx1503q", .data = &sx1503q_device_data },
843 { .compatible = "semtech,sx1504q", .data = &sx1504q_device_data },
844 { .compatible = "semtech,sx1505q", .data = &sx1505q_device_data },
845 { .compatible = "semtech,sx1506q", .data = &sx1506q_device_data },
846 { .compatible = "semtech,sx1507q", .data = &sx1507q_device_data },
847 { .compatible = "semtech,sx1508q", .data = &sx1508q_device_data },
848 { .compatible = "semtech,sx1509q", .data = &sx1509q_device_data },
849 {},
850};
851
852static int sx150x_reset(struct sx150x_pinctrl *pctl)
853{
854 int err;
855
856 err = i2c_smbus_write_byte_data(pctl->client,
857 pctl->data->pri.x789.reg_reset,
858 SX150X_789_RESET_KEY1);
859 if (err < 0)
860 return err;
861
862 err = i2c_smbus_write_byte_data(pctl->client,
863 pctl->data->pri.x789.reg_reset,
864 SX150X_789_RESET_KEY2);
865 return err;
866}
867
868static int sx150x_init_misc(struct sx150x_pinctrl *pctl)
869{
870 u8 reg, value;
871
872 switch (pctl->data->model) {
873 case SX150X_789:
874 reg = pctl->data->pri.x789.reg_misc;
875 value = SX150X_789_REG_MISC_AUTOCLEAR_OFF;
876 break;
877 case SX150X_456:
878 reg = pctl->data->pri.x456.reg_advanced;
879 value = 0x00;
880
881
882
883
884
885 if (!reg)
886 return 0;
887 break;
888 case SX150X_123:
889 reg = pctl->data->pri.x123.reg_advanced;
890 value = 0x00;
891 break;
892 default:
893 WARN(1, "Unknown chip model %d\n", pctl->data->model);
894 return -EINVAL;
895 }
896
897 return regmap_write(pctl->regmap, reg, value);
898}
899
900static int sx150x_init_hw(struct sx150x_pinctrl *pctl)
901{
902 const u8 reg[] = {
903 [SX150X_789] = pctl->data->pri.x789.reg_polarity,
904 [SX150X_456] = pctl->data->pri.x456.reg_pld_mode,
905 [SX150X_123] = pctl->data->pri.x123.reg_pld_mode,
906 };
907 int err;
908
909 if (pctl->data->model == SX150X_789 &&
910 of_property_read_bool(pctl->dev->of_node, "semtech,probe-reset")) {
911 err = sx150x_reset(pctl);
912 if (err < 0)
913 return err;
914 }
915
916 err = sx150x_init_misc(pctl);
917 if (err < 0)
918 return err;
919
920
921 return regmap_write(pctl->regmap, reg[pctl->data->model], 0);
922}
923
924static int sx150x_regmap_reg_width(struct sx150x_pinctrl *pctl,
925 unsigned int reg)
926{
927 const struct sx150x_device_data *data = pctl->data;
928
929 if (reg == data->reg_sense) {
930
931
932
933
934
935 return 2 * data->ngpios;
936 } else if ((data->model == SX150X_789 &&
937 (reg == data->pri.x789.reg_misc ||
938 reg == data->pri.x789.reg_clock ||
939 reg == data->pri.x789.reg_reset))
940 ||
941 (data->model == SX150X_123 &&
942 reg == data->pri.x123.reg_advanced)
943 ||
944 (data->model == SX150X_456 &&
945 data->pri.x456.reg_advanced &&
946 reg == data->pri.x456.reg_advanced)) {
947 return 8;
948 } else {
949 return data->ngpios;
950 }
951}
952
953static unsigned int sx150x_maybe_swizzle(struct sx150x_pinctrl *pctl,
954 unsigned int reg, unsigned int val)
955{
956 unsigned int a, b;
957 const struct sx150x_device_data *data = pctl->data;
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978 if (reg == data->reg_sense &&
979 data->ngpios == 16 &&
980 (data->model == SX150X_123 ||
981 data->model == SX150X_456)) {
982 a = val & 0x00ff0000;
983 b = val & 0x0000ff00;
984
985 val &= 0xff0000ff;
986 val |= b << 8;
987 val |= a >> 8;
988 }
989
990 return val;
991}
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005static int sx150x_regmap_reg_read(void *context, unsigned int reg,
1006 unsigned int *result)
1007{
1008 int ret, n;
1009 struct sx150x_pinctrl *pctl = context;
1010 struct i2c_client *i2c = pctl->client;
1011 const int width = sx150x_regmap_reg_width(pctl, reg);
1012 unsigned int idx, val;
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043 for (n = width, val = 0, idx = reg; n > 0; n -= 8, idx++) {
1044 val <<= 8;
1045
1046 ret = i2c_smbus_read_byte_data(i2c, idx);
1047 if (ret < 0)
1048 return ret;
1049
1050 val |= ret;
1051 }
1052
1053 *result = sx150x_maybe_swizzle(pctl, reg, val);
1054
1055 return 0;
1056}
1057
1058static int sx150x_regmap_reg_write(void *context, unsigned int reg,
1059 unsigned int val)
1060{
1061 int ret, n;
1062 struct sx150x_pinctrl *pctl = context;
1063 struct i2c_client *i2c = pctl->client;
1064 const int width = sx150x_regmap_reg_width(pctl, reg);
1065
1066 val = sx150x_maybe_swizzle(pctl, reg, val);
1067
1068 n = (width - 1) & ~7;
1069 do {
1070 const u8 byte = (val >> n) & 0xff;
1071
1072 ret = i2c_smbus_write_byte_data(i2c, reg, byte);
1073 if (ret < 0)
1074 return ret;
1075
1076 reg++;
1077 n -= 8;
1078 } while (n >= 0);
1079
1080 return 0;
1081}
1082
1083static bool sx150x_reg_volatile(struct device *dev, unsigned int reg)
1084{
1085 struct sx150x_pinctrl *pctl = i2c_get_clientdata(to_i2c_client(dev));
1086
1087 return reg == pctl->data->reg_irq_src || reg == pctl->data->reg_data;
1088}
1089
1090static const struct regmap_config sx150x_regmap_config = {
1091 .reg_bits = 8,
1092 .val_bits = 32,
1093
1094 .cache_type = REGCACHE_RBTREE,
1095
1096 .reg_read = sx150x_regmap_reg_read,
1097 .reg_write = sx150x_regmap_reg_write,
1098
1099 .max_register = SX150X_MAX_REGISTER,
1100 .volatile_reg = sx150x_reg_volatile,
1101};
1102
1103static int sx150x_probe(struct i2c_client *client,
1104 const struct i2c_device_id *id)
1105{
1106 static const u32 i2c_funcs = I2C_FUNC_SMBUS_BYTE_DATA |
1107 I2C_FUNC_SMBUS_WRITE_WORD_DATA;
1108 struct device *dev = &client->dev;
1109 struct sx150x_pinctrl *pctl;
1110 int ret;
1111
1112 if (!i2c_check_functionality(client->adapter, i2c_funcs))
1113 return -ENOSYS;
1114
1115 pctl = devm_kzalloc(dev, sizeof(*pctl), GFP_KERNEL);
1116 if (!pctl)
1117 return -ENOMEM;
1118
1119 i2c_set_clientdata(client, pctl);
1120
1121 pctl->dev = dev;
1122 pctl->client = client;
1123
1124 if (dev->of_node)
1125 pctl->data = of_device_get_match_data(dev);
1126 else
1127 pctl->data = (struct sx150x_device_data *)id->driver_data;
1128
1129 if (!pctl->data)
1130 return -EINVAL;
1131
1132 pctl->regmap = devm_regmap_init(dev, NULL, pctl,
1133 &sx150x_regmap_config);
1134 if (IS_ERR(pctl->regmap)) {
1135 ret = PTR_ERR(pctl->regmap);
1136 dev_err(dev, "Failed to allocate register map: %d\n",
1137 ret);
1138 return ret;
1139 }
1140
1141 mutex_init(&pctl->lock);
1142
1143 ret = sx150x_init_hw(pctl);
1144 if (ret)
1145 return ret;
1146
1147
1148 pctl->pinctrl_desc.name = "sx150x-pinctrl";
1149 pctl->pinctrl_desc.pctlops = &sx150x_pinctrl_ops;
1150 pctl->pinctrl_desc.confops = &sx150x_pinconf_ops;
1151 pctl->pinctrl_desc.pins = pctl->data->pins;
1152 pctl->pinctrl_desc.npins = pctl->data->npins;
1153 pctl->pinctrl_desc.owner = THIS_MODULE;
1154
1155 ret = devm_pinctrl_register_and_init(dev, &pctl->pinctrl_desc,
1156 pctl, &pctl->pctldev);
1157 if (ret) {
1158 dev_err(dev, "Failed to register pinctrl device\n");
1159 return ret;
1160 }
1161
1162 ret = pinctrl_enable(pctl->pctldev);
1163 if (ret) {
1164 dev_err(dev, "Failed to enable pinctrl device\n");
1165 return ret;
1166 }
1167
1168
1169 pctl->gpio.label = devm_kstrdup(dev, client->name, GFP_KERNEL);
1170 pctl->gpio.base = -1;
1171 pctl->gpio.ngpio = pctl->data->npins;
1172 pctl->gpio.get_direction = sx150x_gpio_get_direction;
1173 pctl->gpio.direction_input = sx150x_gpio_direction_input;
1174 pctl->gpio.direction_output = sx150x_gpio_direction_output;
1175 pctl->gpio.get = sx150x_gpio_get;
1176 pctl->gpio.set = sx150x_gpio_set;
1177 pctl->gpio.set_config = gpiochip_generic_config;
1178 pctl->gpio.parent = dev;
1179#ifdef CONFIG_OF_GPIO
1180 pctl->gpio.of_node = dev->of_node;
1181#endif
1182 pctl->gpio.can_sleep = true;
1183
1184
1185
1186
1187
1188
1189 if (pctl->data->model != SX150X_789)
1190 pctl->gpio.set_multiple = sx150x_gpio_set_multiple;
1191
1192 ret = devm_gpiochip_add_data(dev, &pctl->gpio, pctl);
1193 if (ret)
1194 return ret;
1195
1196 ret = gpiochip_add_pin_range(&pctl->gpio, dev_name(dev),
1197 0, 0, pctl->data->npins);
1198 if (ret)
1199 return ret;
1200
1201
1202 if (client->irq > 0) {
1203 pctl->irq_chip.name = devm_kstrdup(dev, client->name,
1204 GFP_KERNEL);
1205 pctl->irq_chip.irq_mask = sx150x_irq_mask;
1206 pctl->irq_chip.irq_unmask = sx150x_irq_unmask;
1207 pctl->irq_chip.irq_set_type = sx150x_irq_set_type;
1208 pctl->irq_chip.irq_bus_lock = sx150x_irq_bus_lock;
1209 pctl->irq_chip.irq_bus_sync_unlock = sx150x_irq_bus_sync_unlock;
1210
1211 pctl->irq.masked = ~0;
1212 pctl->irq.sense = 0;
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225 ret = gpiochip_irqchip_add_nested(&pctl->gpio,
1226 &pctl->irq_chip, 0,
1227 handle_bad_irq, IRQ_TYPE_NONE);
1228 if (ret) {
1229 dev_err(dev, "could not connect irqchip to gpiochip\n");
1230 return ret;
1231 }
1232
1233 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1234 sx150x_irq_thread_fn,
1235 IRQF_ONESHOT | IRQF_SHARED |
1236 IRQF_TRIGGER_FALLING,
1237 pctl->irq_chip.name, pctl);
1238 if (ret < 0)
1239 return ret;
1240
1241 gpiochip_set_nested_irqchip(&pctl->gpio,
1242 &pctl->irq_chip,
1243 client->irq);
1244 }
1245
1246 return 0;
1247}
1248
1249static struct i2c_driver sx150x_driver = {
1250 .driver = {
1251 .name = "sx150x-pinctrl",
1252 .of_match_table = of_match_ptr(sx150x_of_match),
1253 },
1254 .probe = sx150x_probe,
1255 .id_table = sx150x_id,
1256};
1257
1258static int __init sx150x_init(void)
1259{
1260 return i2c_add_driver(&sx150x_driver);
1261}
1262subsys_initcall(sx150x_init);
1263
