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9#include <linux/bitops.h>
10#include <linux/clk.h>
11#include <linux/device.h>
12#include <linux/err.h>
13#include <linux/gpio/driver.h>
14#include <linux/init.h>
15#include <linux/interrupt.h>
16#include <linux/io.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/of_address.h>
20#include <linux/of_device.h>
21#include <linux/of_irq.h>
22#include <linux/regmap.h>
23
24#include "../pinctrl/core.h"
25#include "../pinctrl/pinctrl-rockchip.h"
26
27#define GPIO_TYPE_V1 (0)
28#define GPIO_TYPE_V2 (0x01000C2B)
29
30static const struct rockchip_gpio_regs gpio_regs_v1 = {
31 .port_dr = 0x00,
32 .port_ddr = 0x04,
33 .int_en = 0x30,
34 .int_mask = 0x34,
35 .int_type = 0x38,
36 .int_polarity = 0x3c,
37 .int_status = 0x40,
38 .int_rawstatus = 0x44,
39 .debounce = 0x48,
40 .port_eoi = 0x4c,
41 .ext_port = 0x50,
42};
43
44static const struct rockchip_gpio_regs gpio_regs_v2 = {
45 .port_dr = 0x00,
46 .port_ddr = 0x08,
47 .int_en = 0x10,
48 .int_mask = 0x18,
49 .int_type = 0x20,
50 .int_polarity = 0x28,
51 .int_bothedge = 0x30,
52 .int_status = 0x50,
53 .int_rawstatus = 0x58,
54 .debounce = 0x38,
55 .dbclk_div_en = 0x40,
56 .dbclk_div_con = 0x48,
57 .port_eoi = 0x60,
58 .ext_port = 0x70,
59 .version_id = 0x78,
60};
61
62static inline void gpio_writel_v2(u32 val, void __iomem *reg)
63{
64 writel((val & 0xffff) | 0xffff0000, reg);
65 writel((val >> 16) | 0xffff0000, reg + 0x4);
66}
67
68static inline u32 gpio_readl_v2(void __iomem *reg)
69{
70 return readl(reg + 0x4) << 16 | readl(reg);
71}
72
73static inline void rockchip_gpio_writel(struct rockchip_pin_bank *bank,
74 u32 value, unsigned int offset)
75{
76 void __iomem *reg = bank->reg_base + offset;
77
78 if (bank->gpio_type == GPIO_TYPE_V2)
79 gpio_writel_v2(value, reg);
80 else
81 writel(value, reg);
82}
83
84static inline u32 rockchip_gpio_readl(struct rockchip_pin_bank *bank,
85 unsigned int offset)
86{
87 void __iomem *reg = bank->reg_base + offset;
88 u32 value;
89
90 if (bank->gpio_type == GPIO_TYPE_V2)
91 value = gpio_readl_v2(reg);
92 else
93 value = readl(reg);
94
95 return value;
96}
97
98static inline void rockchip_gpio_writel_bit(struct rockchip_pin_bank *bank,
99 u32 bit, u32 value,
100 unsigned int offset)
101{
102 void __iomem *reg = bank->reg_base + offset;
103 u32 data;
104
105 if (bank->gpio_type == GPIO_TYPE_V2) {
106 if (value)
107 data = BIT(bit % 16) | BIT(bit % 16 + 16);
108 else
109 data = BIT(bit % 16 + 16);
110 writel(data, bit >= 16 ? reg + 0x4 : reg);
111 } else {
112 data = readl(reg);
113 data &= ~BIT(bit);
114 if (value)
115 data |= BIT(bit);
116 writel(data, reg);
117 }
118}
119
120static inline u32 rockchip_gpio_readl_bit(struct rockchip_pin_bank *bank,
121 u32 bit, unsigned int offset)
122{
123 void __iomem *reg = bank->reg_base + offset;
124 u32 data;
125
126 if (bank->gpio_type == GPIO_TYPE_V2) {
127 data = readl(bit >= 16 ? reg + 0x4 : reg);
128 data >>= bit % 16;
129 } else {
130 data = readl(reg);
131 data >>= bit;
132 }
133
134 return data & (0x1);
135}
136
137static int rockchip_gpio_get_direction(struct gpio_chip *chip,
138 unsigned int offset)
139{
140 struct rockchip_pin_bank *bank = gpiochip_get_data(chip);
141 u32 data;
142
143 data = rockchip_gpio_readl_bit(bank, offset, bank->gpio_regs->port_ddr);
144 if (data)
145 return GPIO_LINE_DIRECTION_OUT;
146
147 return GPIO_LINE_DIRECTION_IN;
148}
149
150static int rockchip_gpio_set_direction(struct gpio_chip *chip,
151 unsigned int offset, bool input)
152{
153 struct rockchip_pin_bank *bank = gpiochip_get_data(chip);
154 unsigned long flags;
155 u32 data = input ? 0 : 1;
156
157 raw_spin_lock_irqsave(&bank->slock, flags);
158 rockchip_gpio_writel_bit(bank, offset, data, bank->gpio_regs->port_ddr);
159 raw_spin_unlock_irqrestore(&bank->slock, flags);
160
161 return 0;
162}
163
164static void rockchip_gpio_set(struct gpio_chip *gc, unsigned int offset,
165 int value)
166{
167 struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
168 unsigned long flags;
169
170 raw_spin_lock_irqsave(&bank->slock, flags);
171 rockchip_gpio_writel_bit(bank, offset, value, bank->gpio_regs->port_dr);
172 raw_spin_unlock_irqrestore(&bank->slock, flags);
173}
174
175static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
176{
177 struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
178 u32 data;
179
180 data = readl(bank->reg_base + bank->gpio_regs->ext_port);
181 data >>= offset;
182 data &= 1;
183
184 return data;
185}
186
187static int rockchip_gpio_set_debounce(struct gpio_chip *gc,
188 unsigned int offset,
189 unsigned int debounce)
190{
191 struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
192 const struct rockchip_gpio_regs *reg = bank->gpio_regs;
193 unsigned long flags, div_reg, freq, max_debounce;
194 bool div_debounce_support;
195 unsigned int cur_div_reg;
196 u64 div;
197
198 if (bank->gpio_type == GPIO_TYPE_V2 && !IS_ERR(bank->db_clk)) {
199 div_debounce_support = true;
200 freq = clk_get_rate(bank->db_clk);
201 max_debounce = (GENMASK(23, 0) + 1) * 2 * 1000000 / freq;
202 if (debounce > max_debounce)
203 return -EINVAL;
204
205 div = debounce * freq;
206 div_reg = DIV_ROUND_CLOSEST_ULL(div, 2 * USEC_PER_SEC) - 1;
207 } else {
208 div_debounce_support = false;
209 }
210
211 raw_spin_lock_irqsave(&bank->slock, flags);
212
213
214 if (debounce) {
215 if (div_debounce_support) {
216
217 cur_div_reg = readl(bank->reg_base +
218 reg->dbclk_div_con);
219 if (cur_div_reg < div_reg)
220 writel(div_reg, bank->reg_base +
221 reg->dbclk_div_con);
222 rockchip_gpio_writel_bit(bank, offset, 1,
223 reg->dbclk_div_en);
224 }
225
226 rockchip_gpio_writel_bit(bank, offset, 1, reg->debounce);
227 } else {
228 if (div_debounce_support)
229 rockchip_gpio_writel_bit(bank, offset, 0,
230 reg->dbclk_div_en);
231
232 rockchip_gpio_writel_bit(bank, offset, 0, reg->debounce);
233 }
234
235 raw_spin_unlock_irqrestore(&bank->slock, flags);
236
237
238 if (div_debounce_support) {
239 if (debounce)
240 clk_prepare_enable(bank->db_clk);
241 else
242 clk_disable_unprepare(bank->db_clk);
243 }
244
245 return 0;
246}
247
248static int rockchip_gpio_direction_input(struct gpio_chip *gc,
249 unsigned int offset)
250{
251 return rockchip_gpio_set_direction(gc, offset, true);
252}
253
254static int rockchip_gpio_direction_output(struct gpio_chip *gc,
255 unsigned int offset, int value)
256{
257 rockchip_gpio_set(gc, offset, value);
258
259 return rockchip_gpio_set_direction(gc, offset, false);
260}
261
262
263
264
265
266
267static int rockchip_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
268 unsigned long config)
269{
270 enum pin_config_param param = pinconf_to_config_param(config);
271
272 switch (param) {
273 case PIN_CONFIG_INPUT_DEBOUNCE:
274 rockchip_gpio_set_debounce(gc, offset, true);
275
276
277
278
279
280
281
282
283
284
285
286 return -ENOTSUPP;
287 default:
288 return -ENOTSUPP;
289 }
290}
291
292
293
294
295
296static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
297{
298 struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
299 unsigned int virq;
300
301 if (!bank->domain)
302 return -ENXIO;
303
304 virq = irq_create_mapping(bank->domain, offset);
305
306 return (virq) ? : -ENXIO;
307}
308
309static const struct gpio_chip rockchip_gpiolib_chip = {
310 .request = gpiochip_generic_request,
311 .free = gpiochip_generic_free,
312 .set = rockchip_gpio_set,
313 .get = rockchip_gpio_get,
314 .get_direction = rockchip_gpio_get_direction,
315 .direction_input = rockchip_gpio_direction_input,
316 .direction_output = rockchip_gpio_direction_output,
317 .set_config = rockchip_gpio_set_config,
318 .to_irq = rockchip_gpio_to_irq,
319 .owner = THIS_MODULE,
320};
321
322static void rockchip_irq_demux(struct irq_desc *desc)
323{
324 struct irq_chip *chip = irq_desc_get_chip(desc);
325 struct rockchip_pin_bank *bank = irq_desc_get_handler_data(desc);
326 u32 pend;
327
328 dev_dbg(bank->dev, "got irq for bank %s\n", bank->name);
329
330 chained_irq_enter(chip, desc);
331
332 pend = readl_relaxed(bank->reg_base + bank->gpio_regs->int_status);
333
334 while (pend) {
335 unsigned int irq, virq;
336
337 irq = __ffs(pend);
338 pend &= ~BIT(irq);
339 virq = irq_find_mapping(bank->domain, irq);
340
341 if (!virq) {
342 dev_err(bank->dev, "unmapped irq %d\n", irq);
343 continue;
344 }
345
346 dev_dbg(bank->dev, "handling irq %d\n", irq);
347
348
349
350
351
352 if (bank->toggle_edge_mode & BIT(irq)) {
353 u32 data, data_old, polarity;
354 unsigned long flags;
355
356 data = readl_relaxed(bank->reg_base +
357 bank->gpio_regs->ext_port);
358 do {
359 raw_spin_lock_irqsave(&bank->slock, flags);
360
361 polarity = readl_relaxed(bank->reg_base +
362 bank->gpio_regs->int_polarity);
363 if (data & BIT(irq))
364 polarity &= ~BIT(irq);
365 else
366 polarity |= BIT(irq);
367 writel(polarity,
368 bank->reg_base +
369 bank->gpio_regs->int_polarity);
370
371 raw_spin_unlock_irqrestore(&bank->slock, flags);
372
373 data_old = data;
374 data = readl_relaxed(bank->reg_base +
375 bank->gpio_regs->ext_port);
376 } while ((data & BIT(irq)) != (data_old & BIT(irq)));
377 }
378
379 generic_handle_irq(virq);
380 }
381
382 chained_irq_exit(chip, desc);
383}
384
385static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
386{
387 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
388 struct rockchip_pin_bank *bank = gc->private;
389 u32 mask = BIT(d->hwirq);
390 u32 polarity;
391 u32 level;
392 u32 data;
393 unsigned long flags;
394 int ret = 0;
395
396 raw_spin_lock_irqsave(&bank->slock, flags);
397
398 rockchip_gpio_writel_bit(bank, d->hwirq, 0,
399 bank->gpio_regs->port_ddr);
400
401 raw_spin_unlock_irqrestore(&bank->slock, flags);
402
403 if (type & IRQ_TYPE_EDGE_BOTH)
404 irq_set_handler_locked(d, handle_edge_irq);
405 else
406 irq_set_handler_locked(d, handle_level_irq);
407
408 raw_spin_lock_irqsave(&bank->slock, flags);
409
410 level = rockchip_gpio_readl(bank, bank->gpio_regs->int_type);
411 polarity = rockchip_gpio_readl(bank, bank->gpio_regs->int_polarity);
412
413 switch (type) {
414 case IRQ_TYPE_EDGE_BOTH:
415 if (bank->gpio_type == GPIO_TYPE_V2) {
416 bank->toggle_edge_mode &= ~mask;
417 rockchip_gpio_writel_bit(bank, d->hwirq, 1,
418 bank->gpio_regs->int_bothedge);
419 goto out;
420 } else {
421 bank->toggle_edge_mode |= mask;
422 level |= mask;
423
424
425
426
427
428 data = readl(bank->reg_base + bank->gpio_regs->ext_port);
429 if (data & mask)
430 polarity &= ~mask;
431 else
432 polarity |= mask;
433 }
434 break;
435 case IRQ_TYPE_EDGE_RISING:
436 bank->toggle_edge_mode &= ~mask;
437 level |= mask;
438 polarity |= mask;
439 break;
440 case IRQ_TYPE_EDGE_FALLING:
441 bank->toggle_edge_mode &= ~mask;
442 level |= mask;
443 polarity &= ~mask;
444 break;
445 case IRQ_TYPE_LEVEL_HIGH:
446 bank->toggle_edge_mode &= ~mask;
447 level &= ~mask;
448 polarity |= mask;
449 break;
450 case IRQ_TYPE_LEVEL_LOW:
451 bank->toggle_edge_mode &= ~mask;
452 level &= ~mask;
453 polarity &= ~mask;
454 break;
455 default:
456 ret = -EINVAL;
457 goto out;
458 }
459
460 rockchip_gpio_writel(bank, level, bank->gpio_regs->int_type);
461 rockchip_gpio_writel(bank, polarity, bank->gpio_regs->int_polarity);
462out:
463 raw_spin_unlock_irqrestore(&bank->slock, flags);
464
465 return ret;
466}
467
468static void rockchip_irq_suspend(struct irq_data *d)
469{
470 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
471 struct rockchip_pin_bank *bank = gc->private;
472
473 bank->saved_masks = irq_reg_readl(gc, bank->gpio_regs->int_mask);
474 irq_reg_writel(gc, ~gc->wake_active, bank->gpio_regs->int_mask);
475}
476
477static void rockchip_irq_resume(struct irq_data *d)
478{
479 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
480 struct rockchip_pin_bank *bank = gc->private;
481
482 irq_reg_writel(gc, bank->saved_masks, bank->gpio_regs->int_mask);
483}
484
485static void rockchip_irq_enable(struct irq_data *d)
486{
487 irq_gc_mask_clr_bit(d);
488}
489
490static void rockchip_irq_disable(struct irq_data *d)
491{
492 irq_gc_mask_set_bit(d);
493}
494
495static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
496{
497 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
498 struct irq_chip_generic *gc;
499 int ret;
500
501 bank->domain = irq_domain_add_linear(bank->of_node, 32,
502 &irq_generic_chip_ops, NULL);
503 if (!bank->domain) {
504 dev_warn(bank->dev, "could not init irq domain for bank %s\n",
505 bank->name);
506 return -EINVAL;
507 }
508
509 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
510 "rockchip_gpio_irq",
511 handle_level_irq,
512 clr, 0, 0);
513 if (ret) {
514 dev_err(bank->dev, "could not alloc generic chips for bank %s\n",
515 bank->name);
516 irq_domain_remove(bank->domain);
517 return -EINVAL;
518 }
519
520 gc = irq_get_domain_generic_chip(bank->domain, 0);
521 if (bank->gpio_type == GPIO_TYPE_V2) {
522 gc->reg_writel = gpio_writel_v2;
523 gc->reg_readl = gpio_readl_v2;
524 }
525
526 gc->reg_base = bank->reg_base;
527 gc->private = bank;
528 gc->chip_types[0].regs.mask = bank->gpio_regs->int_mask;
529 gc->chip_types[0].regs.ack = bank->gpio_regs->port_eoi;
530 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
531 gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
532 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
533 gc->chip_types[0].chip.irq_enable = rockchip_irq_enable;
534 gc->chip_types[0].chip.irq_disable = rockchip_irq_disable;
535 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
536 gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
537 gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
538 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
539 gc->wake_enabled = IRQ_MSK(bank->nr_pins);
540
541
542
543
544
545
546 rockchip_gpio_writel(bank, 0xffffffff, bank->gpio_regs->int_mask);
547 rockchip_gpio_writel(bank, 0xffffffff, bank->gpio_regs->port_eoi);
548 rockchip_gpio_writel(bank, 0xffffffff, bank->gpio_regs->int_en);
549 gc->mask_cache = 0xffffffff;
550
551 irq_set_chained_handler_and_data(bank->irq,
552 rockchip_irq_demux, bank);
553
554 return 0;
555}
556
557static int rockchip_gpiolib_register(struct rockchip_pin_bank *bank)
558{
559 struct gpio_chip *gc;
560 int ret;
561
562 bank->gpio_chip = rockchip_gpiolib_chip;
563
564 gc = &bank->gpio_chip;
565 gc->base = bank->pin_base;
566 gc->ngpio = bank->nr_pins;
567 gc->label = bank->name;
568 gc->parent = bank->dev;
569#ifdef CONFIG_OF_GPIO
570 gc->of_node = of_node_get(bank->of_node);
571#endif
572
573 ret = gpiochip_add_data(gc, bank);
574 if (ret) {
575 dev_err(bank->dev, "failed to add gpiochip %s, %d\n",
576 gc->label, ret);
577 return ret;
578 }
579
580
581
582
583
584
585
586
587
588
589
590 if (!of_property_read_bool(bank->of_node, "gpio-ranges")) {
591 struct device_node *pctlnp = of_get_parent(bank->of_node);
592 struct pinctrl_dev *pctldev = NULL;
593
594 if (!pctlnp)
595 return -ENODATA;
596
597 pctldev = of_pinctrl_get(pctlnp);
598 if (!pctldev)
599 return -ENODEV;
600
601 ret = gpiochip_add_pin_range(gc, dev_name(pctldev->dev), 0,
602 gc->base, gc->ngpio);
603 if (ret) {
604 dev_err(bank->dev, "Failed to add pin range\n");
605 goto fail;
606 }
607 }
608
609 ret = rockchip_interrupts_register(bank);
610 if (ret) {
611 dev_err(bank->dev, "failed to register interrupt, %d\n", ret);
612 goto fail;
613 }
614
615 return 0;
616
617fail:
618 gpiochip_remove(&bank->gpio_chip);
619
620 return ret;
621}
622
623static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
624{
625 struct resource res;
626 int id = 0;
627
628 if (of_address_to_resource(bank->of_node, 0, &res)) {
629 dev_err(bank->dev, "cannot find IO resource for bank\n");
630 return -ENOENT;
631 }
632
633 bank->reg_base = devm_ioremap_resource(bank->dev, &res);
634 if (IS_ERR(bank->reg_base))
635 return PTR_ERR(bank->reg_base);
636
637 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
638 if (!bank->irq)
639 return -EINVAL;
640
641 bank->clk = of_clk_get(bank->of_node, 0);
642 if (IS_ERR(bank->clk))
643 return PTR_ERR(bank->clk);
644
645 clk_prepare_enable(bank->clk);
646 id = readl(bank->reg_base + gpio_regs_v2.version_id);
647
648
649 if (id == GPIO_TYPE_V2) {
650 bank->gpio_regs = &gpio_regs_v2;
651 bank->gpio_type = GPIO_TYPE_V2;
652 bank->db_clk = of_clk_get(bank->of_node, 1);
653 if (IS_ERR(bank->db_clk)) {
654 dev_err(bank->dev, "cannot find debounce clk\n");
655 clk_disable_unprepare(bank->clk);
656 return -EINVAL;
657 }
658 } else {
659 bank->gpio_regs = &gpio_regs_v1;
660 bank->gpio_type = GPIO_TYPE_V1;
661 }
662
663 return 0;
664}
665
666static struct rockchip_pin_bank *
667rockchip_gpio_find_bank(struct pinctrl_dev *pctldev, int id)
668{
669 struct rockchip_pinctrl *info;
670 struct rockchip_pin_bank *bank;
671 int i, found = 0;
672
673 info = pinctrl_dev_get_drvdata(pctldev);
674 bank = info->ctrl->pin_banks;
675 for (i = 0; i < info->ctrl->nr_banks; i++, bank++) {
676 if (bank->bank_num == id) {
677 found = 1;
678 break;
679 }
680 }
681
682 return found ? bank : NULL;
683}
684
685static int rockchip_gpio_probe(struct platform_device *pdev)
686{
687 struct device *dev = &pdev->dev;
688 struct device_node *np = dev->of_node;
689 struct device_node *pctlnp = of_get_parent(np);
690 struct pinctrl_dev *pctldev = NULL;
691 struct rockchip_pin_bank *bank = NULL;
692 struct rockchip_pin_output_deferred *cfg;
693 static int gpio;
694 int id, ret;
695
696 if (!np || !pctlnp)
697 return -ENODEV;
698
699 pctldev = of_pinctrl_get(pctlnp);
700 if (!pctldev)
701 return -EPROBE_DEFER;
702
703 id = of_alias_get_id(np, "gpio");
704 if (id < 0)
705 id = gpio++;
706
707 bank = rockchip_gpio_find_bank(pctldev, id);
708 if (!bank)
709 return -EINVAL;
710
711 bank->dev = dev;
712 bank->of_node = np;
713
714 raw_spin_lock_init(&bank->slock);
715
716 ret = rockchip_get_bank_data(bank);
717 if (ret)
718 return ret;
719
720
721
722
723
724 mutex_lock(&bank->deferred_lock);
725
726 ret = rockchip_gpiolib_register(bank);
727 if (ret) {
728 clk_disable_unprepare(bank->clk);
729 mutex_unlock(&bank->deferred_lock);
730 return ret;
731 }
732
733 while (!list_empty(&bank->deferred_output)) {
734 cfg = list_first_entry(&bank->deferred_output,
735 struct rockchip_pin_output_deferred, head);
736 list_del(&cfg->head);
737
738 ret = rockchip_gpio_direction_output(&bank->gpio_chip, cfg->pin, cfg->arg);
739 if (ret)
740 dev_warn(dev, "setting output pin %u to %u failed\n", cfg->pin, cfg->arg);
741
742 kfree(cfg);
743 }
744
745 mutex_unlock(&bank->deferred_lock);
746
747 platform_set_drvdata(pdev, bank);
748 dev_info(dev, "probed %pOF\n", np);
749
750 return 0;
751}
752
753static int rockchip_gpio_remove(struct platform_device *pdev)
754{
755 struct rockchip_pin_bank *bank = platform_get_drvdata(pdev);
756
757 clk_disable_unprepare(bank->clk);
758 gpiochip_remove(&bank->gpio_chip);
759
760 return 0;
761}
762
763static const struct of_device_id rockchip_gpio_match[] = {
764 { .compatible = "rockchip,gpio-bank", },
765 { .compatible = "rockchip,rk3188-gpio-bank0" },
766 { },
767};
768
769static struct platform_driver rockchip_gpio_driver = {
770 .probe = rockchip_gpio_probe,
771 .remove = rockchip_gpio_remove,
772 .driver = {
773 .name = "rockchip-gpio",
774 .of_match_table = rockchip_gpio_match,
775 },
776};
777
778static int __init rockchip_gpio_init(void)
779{
780 return platform_driver_register(&rockchip_gpio_driver);
781}
782postcore_initcall(rockchip_gpio_init);
783
784static void __exit rockchip_gpio_exit(void)
785{
786 platform_driver_unregister(&rockchip_gpio_driver);
787}
788module_exit(rockchip_gpio_exit);
789
790MODULE_DESCRIPTION("Rockchip gpio driver");
791MODULE_ALIAS("platform:rockchip-gpio");
792MODULE_LICENSE("GPL v2");
793MODULE_DEVICE_TABLE(of, rockchip_gpio_match);
794