1 // SPDX-License-Identifier: GPL-2.0-only
3 * arch/arm/mach-tegra/gpio.c
5 * Copyright (c) 2010 Google, Inc
6 * Copyright (c) 2011-2016, NVIDIA CORPORATION. All rights reserved.
12 #include <linux/err.h>
13 #include <linux/init.h>
14 #include <linux/irq.h>
15 #include <linux/interrupt.h>
17 #include <linux/gpio/driver.h>
19 #include <linux/platform_device.h>
20 #include <linux/module.h>
21 #include <linux/seq_file.h>
22 #include <linux/irqdomain.h>
23 #include <linux/irqchip/chained_irq.h>
24 #include <linux/pinctrl/consumer.h>
27 #define GPIO_BANK(x) ((x) >> 5)
28 #define GPIO_PORT(x) (((x) >> 3) & 0x3)
29 #define GPIO_BIT(x) ((x) & 0x7)
31 #define GPIO_REG(tgi, x) (GPIO_BANK(x) * tgi->soc->bank_stride + \
34 #define GPIO_CNF(t, x) (GPIO_REG(t, x) + 0x00)
35 #define GPIO_OE(t, x) (GPIO_REG(t, x) + 0x10)
36 #define GPIO_OUT(t, x) (GPIO_REG(t, x) + 0X20)
37 #define GPIO_IN(t, x) (GPIO_REG(t, x) + 0x30)
38 #define GPIO_INT_STA(t, x) (GPIO_REG(t, x) + 0x40)
39 #define GPIO_INT_ENB(t, x) (GPIO_REG(t, x) + 0x50)
40 #define GPIO_INT_LVL(t, x) (GPIO_REG(t, x) + 0x60)
41 #define GPIO_INT_CLR(t, x) (GPIO_REG(t, x) + 0x70)
42 #define GPIO_DBC_CNT(t, x) (GPIO_REG(t, x) + 0xF0)
45 #define GPIO_MSK_CNF(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x00)
46 #define GPIO_MSK_OE(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x10)
47 #define GPIO_MSK_OUT(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0X20)
48 #define GPIO_MSK_DBC_EN(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x30)
49 #define GPIO_MSK_INT_STA(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x40)
50 #define GPIO_MSK_INT_ENB(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x50)
51 #define GPIO_MSK_INT_LVL(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x60)
53 #define GPIO_INT_LVL_MASK 0x010101
54 #define GPIO_INT_LVL_EDGE_RISING 0x000101
55 #define GPIO_INT_LVL_EDGE_FALLING 0x000100
56 #define GPIO_INT_LVL_EDGE_BOTH 0x010100
57 #define GPIO_INT_LVL_LEVEL_HIGH 0x000001
58 #define GPIO_INT_LVL_LEVEL_LOW 0x000000
60 struct tegra_gpio_info;
62 struct tegra_gpio_bank {
66 * IRQ-core code uses raw locking, and thus, nested locking also
67 * should be raw in order not to trip spinlock debug warnings.
69 raw_spinlock_t lvl_lock[4];
71 /* Lock for updating debounce count register */
72 spinlock_t dbc_lock[4];
74 #ifdef CONFIG_PM_SLEEP
86 struct tegra_gpio_soc_config {
87 bool debounce_supported;
92 struct tegra_gpio_info {
95 struct tegra_gpio_bank *bank_info;
96 const struct tegra_gpio_soc_config *soc;
102 static inline void tegra_gpio_writel(struct tegra_gpio_info *tgi,
105 writel_relaxed(val, tgi->regs + reg);
108 static inline u32 tegra_gpio_readl(struct tegra_gpio_info *tgi, u32 reg)
110 return readl_relaxed(tgi->regs + reg);
113 static unsigned int tegra_gpio_compose(unsigned int bank, unsigned int port,
116 return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7);
119 static void tegra_gpio_mask_write(struct tegra_gpio_info *tgi, u32 reg,
120 unsigned int gpio, u32 value)
124 val = 0x100 << GPIO_BIT(gpio);
126 val |= 1 << GPIO_BIT(gpio);
127 tegra_gpio_writel(tgi, val, reg);
130 static void tegra_gpio_enable(struct tegra_gpio_info *tgi, unsigned int gpio)
132 tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 1);
135 static void tegra_gpio_disable(struct tegra_gpio_info *tgi, unsigned int gpio)
137 tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 0);
140 static void tegra_gpio_free(struct gpio_chip *chip, unsigned int offset)
142 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
144 pinctrl_gpio_free(chip, offset);
145 tegra_gpio_disable(tgi, offset);
148 static void tegra_gpio_set(struct gpio_chip *chip, unsigned int offset,
151 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
153 tegra_gpio_mask_write(tgi, GPIO_MSK_OUT(tgi, offset), offset, value);
156 static int tegra_gpio_get(struct gpio_chip *chip, unsigned int offset)
158 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
159 unsigned int bval = BIT(GPIO_BIT(offset));
161 /* If gpio is in output mode then read from the out value */
162 if (tegra_gpio_readl(tgi, GPIO_OE(tgi, offset)) & bval)
163 return !!(tegra_gpio_readl(tgi, GPIO_OUT(tgi, offset)) & bval);
165 return !!(tegra_gpio_readl(tgi, GPIO_IN(tgi, offset)) & bval);
168 static int tegra_gpio_direction_input(struct gpio_chip *chip,
171 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
174 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 0);
175 tegra_gpio_enable(tgi, offset);
177 ret = pinctrl_gpio_direction_input(chip, offset);
180 "Failed to set pinctrl input direction of GPIO %d: %d",
181 chip->base + offset, ret);
186 static int tegra_gpio_direction_output(struct gpio_chip *chip,
190 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
193 tegra_gpio_set(chip, offset, value);
194 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 1);
195 tegra_gpio_enable(tgi, offset);
197 ret = pinctrl_gpio_direction_output(chip, offset);
200 "Failed to set pinctrl output direction of GPIO %d: %d",
201 chip->base + offset, ret);
206 static int tegra_gpio_get_direction(struct gpio_chip *chip,
209 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
210 u32 pin_mask = BIT(GPIO_BIT(offset));
213 cnf = tegra_gpio_readl(tgi, GPIO_CNF(tgi, offset));
214 if (!(cnf & pin_mask))
217 oe = tegra_gpio_readl(tgi, GPIO_OE(tgi, offset));
220 return GPIO_LINE_DIRECTION_OUT;
222 return GPIO_LINE_DIRECTION_IN;
225 static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
226 unsigned int debounce)
228 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
229 struct tegra_gpio_bank *bank = &tgi->bank_info[GPIO_BANK(offset)];
230 unsigned int debounce_ms = DIV_ROUND_UP(debounce, 1000);
235 tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset),
240 debounce_ms = min(debounce_ms, 255U);
241 port = GPIO_PORT(offset);
243 /* There is only one debounce count register per port and hence
244 * set the maximum of current and requested debounce time.
246 spin_lock_irqsave(&bank->dbc_lock[port], flags);
247 if (bank->dbc_cnt[port] < debounce_ms) {
248 tegra_gpio_writel(tgi, debounce_ms, GPIO_DBC_CNT(tgi, offset));
249 bank->dbc_cnt[port] = debounce_ms;
251 spin_unlock_irqrestore(&bank->dbc_lock[port], flags);
253 tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset), offset, 1);
258 static int tegra_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
259 unsigned long config)
263 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
266 debounce = pinconf_to_config_argument(config);
267 return tegra_gpio_set_debounce(chip, offset, debounce);
270 static void tegra_gpio_irq_ack(struct irq_data *d)
272 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
273 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
274 unsigned int gpio = d->hwirq;
276 tegra_gpio_writel(tgi, 1 << GPIO_BIT(gpio), GPIO_INT_CLR(tgi, gpio));
279 static void tegra_gpio_irq_mask(struct irq_data *d)
281 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
282 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
283 unsigned int gpio = d->hwirq;
285 tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 0);
286 gpiochip_disable_irq(chip, gpio);
289 static void tegra_gpio_irq_unmask(struct irq_data *d)
291 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
292 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
293 unsigned int gpio = d->hwirq;
295 gpiochip_enable_irq(chip, gpio);
296 tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 1);
299 static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
301 unsigned int gpio = d->hwirq, port = GPIO_PORT(gpio), lvl_type;
302 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
303 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
304 struct tegra_gpio_bank *bank;
309 bank = &tgi->bank_info[GPIO_BANK(d->hwirq)];
311 switch (type & IRQ_TYPE_SENSE_MASK) {
312 case IRQ_TYPE_EDGE_RISING:
313 lvl_type = GPIO_INT_LVL_EDGE_RISING;
316 case IRQ_TYPE_EDGE_FALLING:
317 lvl_type = GPIO_INT_LVL_EDGE_FALLING;
320 case IRQ_TYPE_EDGE_BOTH:
321 lvl_type = GPIO_INT_LVL_EDGE_BOTH;
324 case IRQ_TYPE_LEVEL_HIGH:
325 lvl_type = GPIO_INT_LVL_LEVEL_HIGH;
328 case IRQ_TYPE_LEVEL_LOW:
329 lvl_type = GPIO_INT_LVL_LEVEL_LOW;
336 raw_spin_lock_irqsave(&bank->lvl_lock[port], flags);
338 val = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
339 val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio));
340 val |= lvl_type << GPIO_BIT(gpio);
341 tegra_gpio_writel(tgi, val, GPIO_INT_LVL(tgi, gpio));
343 raw_spin_unlock_irqrestore(&bank->lvl_lock[port], flags);
345 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, gpio), gpio, 0);
346 tegra_gpio_enable(tgi, gpio);
348 ret = gpiochip_lock_as_irq(&tgi->gc, gpio);
351 "unable to lock Tegra GPIO %u as IRQ\n", gpio);
352 tegra_gpio_disable(tgi, gpio);
356 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
357 irq_set_handler_locked(d, handle_level_irq);
358 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
359 irq_set_handler_locked(d, handle_edge_irq);
362 ret = irq_chip_set_type_parent(d, type);
367 static void tegra_gpio_irq_shutdown(struct irq_data *d)
369 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
370 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
371 unsigned int gpio = d->hwirq;
373 tegra_gpio_irq_mask(d);
374 gpiochip_unlock_as_irq(&tgi->gc, gpio);
377 static void tegra_gpio_irq_handler(struct irq_desc *desc)
379 struct tegra_gpio_info *tgi = irq_desc_get_handler_data(desc);
380 struct irq_chip *chip = irq_desc_get_chip(desc);
381 struct irq_domain *domain = tgi->gc.irq.domain;
382 unsigned int irq = irq_desc_get_irq(desc);
383 struct tegra_gpio_bank *bank = NULL;
384 unsigned int port, pin, gpio, i;
385 bool unmasked = false;
389 for (i = 0; i < tgi->bank_count; i++) {
390 if (tgi->irqs[i] == irq) {
391 bank = &tgi->bank_info[i];
396 if (WARN_ON(bank == NULL))
399 chained_irq_enter(chip, desc);
401 for (port = 0; port < 4; port++) {
402 gpio = tegra_gpio_compose(bank->bank, port, 0);
403 sta = tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)) &
404 tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio));
405 lvl = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
407 for_each_set_bit(pin, &sta, 8) {
410 tegra_gpio_writel(tgi, 1 << pin,
411 GPIO_INT_CLR(tgi, gpio));
413 /* if gpio is edge triggered, clear condition
414 * before executing the handler so that we don't
417 if (!unmasked && lvl & (0x100 << pin)) {
419 chained_irq_exit(chip, desc);
422 ret = generic_handle_domain_irq(domain, gpio + pin);
423 WARN_RATELIMIT(ret, "hwirq = %d", gpio + pin);
428 chained_irq_exit(chip, desc);
431 static int tegra_gpio_child_to_parent_hwirq(struct gpio_chip *chip,
434 unsigned int *parent_hwirq,
435 unsigned int *parent_type)
437 *parent_hwirq = chip->irq.child_offset_to_irq(chip, hwirq);
443 static int tegra_gpio_populate_parent_fwspec(struct gpio_chip *chip,
444 union gpio_irq_fwspec *gfwspec,
445 unsigned int parent_hwirq,
446 unsigned int parent_type)
448 struct irq_fwspec *fwspec = &gfwspec->fwspec;
450 fwspec->fwnode = chip->irq.parent_domain->fwnode;
451 fwspec->param_count = 3;
452 fwspec->param[0] = 0;
453 fwspec->param[1] = parent_hwirq;
454 fwspec->param[2] = parent_type;
459 #ifdef CONFIG_PM_SLEEP
460 static int tegra_gpio_resume(struct device *dev)
462 struct tegra_gpio_info *tgi = dev_get_drvdata(dev);
465 for (b = 0; b < tgi->bank_count; b++) {
466 struct tegra_gpio_bank *bank = &tgi->bank_info[b];
468 for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
469 unsigned int gpio = (b << 5) | (p << 3);
471 tegra_gpio_writel(tgi, bank->cnf[p],
472 GPIO_CNF(tgi, gpio));
474 if (tgi->soc->debounce_supported) {
475 tegra_gpio_writel(tgi, bank->dbc_cnt[p],
476 GPIO_DBC_CNT(tgi, gpio));
477 tegra_gpio_writel(tgi, bank->dbc_enb[p],
478 GPIO_MSK_DBC_EN(tgi, gpio));
481 tegra_gpio_writel(tgi, bank->out[p],
482 GPIO_OUT(tgi, gpio));
483 tegra_gpio_writel(tgi, bank->oe[p],
485 tegra_gpio_writel(tgi, bank->int_lvl[p],
486 GPIO_INT_LVL(tgi, gpio));
487 tegra_gpio_writel(tgi, bank->int_enb[p],
488 GPIO_INT_ENB(tgi, gpio));
495 static int tegra_gpio_suspend(struct device *dev)
497 struct tegra_gpio_info *tgi = dev_get_drvdata(dev);
500 for (b = 0; b < tgi->bank_count; b++) {
501 struct tegra_gpio_bank *bank = &tgi->bank_info[b];
503 for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
504 unsigned int gpio = (b << 5) | (p << 3);
506 bank->cnf[p] = tegra_gpio_readl(tgi,
507 GPIO_CNF(tgi, gpio));
508 bank->out[p] = tegra_gpio_readl(tgi,
509 GPIO_OUT(tgi, gpio));
510 bank->oe[p] = tegra_gpio_readl(tgi,
512 if (tgi->soc->debounce_supported) {
513 bank->dbc_enb[p] = tegra_gpio_readl(tgi,
514 GPIO_MSK_DBC_EN(tgi, gpio));
515 bank->dbc_enb[p] = (bank->dbc_enb[p] << 8) |
519 bank->int_enb[p] = tegra_gpio_readl(tgi,
520 GPIO_INT_ENB(tgi, gpio));
521 bank->int_lvl[p] = tegra_gpio_readl(tgi,
522 GPIO_INT_LVL(tgi, gpio));
524 /* Enable gpio irq for wake up source */
525 tegra_gpio_writel(tgi, bank->wake_enb[p],
526 GPIO_INT_ENB(tgi, gpio));
533 static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
535 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
536 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
537 struct tegra_gpio_bank *bank;
538 unsigned int gpio = d->hwirq;
542 bank = &tgi->bank_info[GPIO_BANK(d->hwirq)];
544 port = GPIO_PORT(gpio);
545 bit = GPIO_BIT(gpio);
548 err = irq_set_irq_wake(tgi->irqs[bank->bank], enable);
552 if (d->parent_data) {
553 err = irq_chip_set_wake_parent(d, enable);
555 irq_set_irq_wake(tgi->irqs[bank->bank], !enable);
561 bank->wake_enb[port] |= mask;
563 bank->wake_enb[port] &= ~mask;
569 static int tegra_gpio_irq_set_affinity(struct irq_data *data,
570 const struct cpumask *dest,
573 if (data->parent_data)
574 return irq_chip_set_affinity_parent(data, dest, force);
579 static int tegra_gpio_irq_request_resources(struct irq_data *d)
581 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
582 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
584 tegra_gpio_enable(tgi, d->hwirq);
586 return gpiochip_reqres_irq(chip, d->hwirq);
589 static void tegra_gpio_irq_release_resources(struct irq_data *d)
591 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
592 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
594 gpiochip_relres_irq(chip, d->hwirq);
595 tegra_gpio_enable(tgi, d->hwirq);
598 static void tegra_gpio_irq_print_chip(struct irq_data *d, struct seq_file *s)
600 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
602 seq_printf(s, dev_name(chip->parent));
605 static const struct irq_chip tegra_gpio_irq_chip = {
606 .irq_shutdown = tegra_gpio_irq_shutdown,
607 .irq_ack = tegra_gpio_irq_ack,
608 .irq_mask = tegra_gpio_irq_mask,
609 .irq_unmask = tegra_gpio_irq_unmask,
610 .irq_set_type = tegra_gpio_irq_set_type,
611 #ifdef CONFIG_PM_SLEEP
612 .irq_set_wake = tegra_gpio_irq_set_wake,
614 .irq_print_chip = tegra_gpio_irq_print_chip,
615 .irq_request_resources = tegra_gpio_irq_request_resources,
616 .irq_release_resources = tegra_gpio_irq_release_resources,
617 .flags = IRQCHIP_IMMUTABLE,
620 static const struct irq_chip tegra210_gpio_irq_chip = {
621 .irq_shutdown = tegra_gpio_irq_shutdown,
622 .irq_ack = tegra_gpio_irq_ack,
623 .irq_mask = tegra_gpio_irq_mask,
624 .irq_unmask = tegra_gpio_irq_unmask,
625 .irq_set_affinity = tegra_gpio_irq_set_affinity,
626 .irq_set_type = tegra_gpio_irq_set_type,
627 #ifdef CONFIG_PM_SLEEP
628 .irq_set_wake = tegra_gpio_irq_set_wake,
630 .irq_print_chip = tegra_gpio_irq_print_chip,
631 .irq_request_resources = tegra_gpio_irq_request_resources,
632 .irq_release_resources = tegra_gpio_irq_release_resources,
633 .flags = IRQCHIP_IMMUTABLE,
636 #ifdef CONFIG_DEBUG_FS
638 #include <linux/debugfs.h>
640 static int tegra_dbg_gpio_show(struct seq_file *s, void *unused)
642 struct tegra_gpio_info *tgi = dev_get_drvdata(s->private);
645 for (i = 0; i < tgi->bank_count; i++) {
646 for (j = 0; j < 4; j++) {
647 unsigned int gpio = tegra_gpio_compose(i, j, 0);
650 "%u:%u %02x %02x %02x %02x %02x %02x %06x\n",
652 tegra_gpio_readl(tgi, GPIO_CNF(tgi, gpio)),
653 tegra_gpio_readl(tgi, GPIO_OE(tgi, gpio)),
654 tegra_gpio_readl(tgi, GPIO_OUT(tgi, gpio)),
655 tegra_gpio_readl(tgi, GPIO_IN(tgi, gpio)),
656 tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)),
657 tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio)),
658 tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio)));
664 static void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
666 debugfs_create_devm_seqfile(tgi->dev, "tegra_gpio", NULL,
667 tegra_dbg_gpio_show);
672 static inline void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
678 static const struct dev_pm_ops tegra_gpio_pm_ops = {
679 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume)
682 static const struct of_device_id tegra_pmc_of_match[] = {
683 { .compatible = "nvidia,tegra210-pmc", },
687 static int tegra_gpio_probe(struct platform_device *pdev)
689 struct tegra_gpio_bank *bank;
690 struct tegra_gpio_info *tgi;
691 struct gpio_irq_chip *irq;
692 struct device_node *np;
696 tgi = devm_kzalloc(&pdev->dev, sizeof(*tgi), GFP_KERNEL);
700 tgi->soc = of_device_get_match_data(&pdev->dev);
701 tgi->dev = &pdev->dev;
703 ret = platform_irq_count(pdev);
707 tgi->bank_count = ret;
709 if (!tgi->bank_count) {
710 dev_err(&pdev->dev, "Missing IRQ resource\n");
714 tgi->gc.label = "tegra-gpio";
715 tgi->gc.request = pinctrl_gpio_request;
716 tgi->gc.free = tegra_gpio_free;
717 tgi->gc.direction_input = tegra_gpio_direction_input;
718 tgi->gc.get = tegra_gpio_get;
719 tgi->gc.direction_output = tegra_gpio_direction_output;
720 tgi->gc.set = tegra_gpio_set;
721 tgi->gc.get_direction = tegra_gpio_get_direction;
723 tgi->gc.ngpio = tgi->bank_count * 32;
724 tgi->gc.parent = &pdev->dev;
726 platform_set_drvdata(pdev, tgi);
728 if (tgi->soc->debounce_supported)
729 tgi->gc.set_config = tegra_gpio_set_config;
731 tgi->bank_info = devm_kcalloc(&pdev->dev, tgi->bank_count,
732 sizeof(*tgi->bank_info), GFP_KERNEL);
736 tgi->irqs = devm_kcalloc(&pdev->dev, tgi->bank_count,
737 sizeof(*tgi->irqs), GFP_KERNEL);
741 for (i = 0; i < tgi->bank_count; i++) {
742 ret = platform_get_irq(pdev, i);
746 bank = &tgi->bank_info[i];
751 for (j = 0; j < 4; j++) {
752 raw_spin_lock_init(&bank->lvl_lock[j]);
753 spin_lock_init(&bank->dbc_lock[j]);
758 irq->fwnode = of_node_to_fwnode(pdev->dev.of_node);
759 irq->child_to_parent_hwirq = tegra_gpio_child_to_parent_hwirq;
760 irq->populate_parent_alloc_arg = tegra_gpio_populate_parent_fwspec;
761 irq->handler = handle_simple_irq;
762 irq->default_type = IRQ_TYPE_NONE;
763 irq->parent_handler = tegra_gpio_irq_handler;
764 irq->parent_handler_data = tgi;
765 irq->num_parents = tgi->bank_count;
766 irq->parents = tgi->irqs;
768 np = of_find_matching_node(NULL, tegra_pmc_of_match);
770 irq->parent_domain = irq_find_host(np);
773 if (!irq->parent_domain)
774 return -EPROBE_DEFER;
776 gpio_irq_chip_set_chip(irq, &tegra210_gpio_irq_chip);
778 gpio_irq_chip_set_chip(irq, &tegra_gpio_irq_chip);
781 tgi->regs = devm_platform_ioremap_resource(pdev, 0);
782 if (IS_ERR(tgi->regs))
783 return PTR_ERR(tgi->regs);
785 for (i = 0; i < tgi->bank_count; i++) {
786 for (j = 0; j < 4; j++) {
787 int gpio = tegra_gpio_compose(i, j, 0);
789 tegra_gpio_writel(tgi, 0x00, GPIO_INT_ENB(tgi, gpio));
793 ret = devm_gpiochip_add_data(&pdev->dev, &tgi->gc, tgi);
797 tegra_gpio_debuginit(tgi);
802 static const struct tegra_gpio_soc_config tegra20_gpio_config = {
804 .upper_offset = 0x800,
807 static const struct tegra_gpio_soc_config tegra30_gpio_config = {
808 .bank_stride = 0x100,
809 .upper_offset = 0x80,
812 static const struct tegra_gpio_soc_config tegra210_gpio_config = {
813 .debounce_supported = true,
814 .bank_stride = 0x100,
815 .upper_offset = 0x80,
818 static const struct of_device_id tegra_gpio_of_match[] = {
819 { .compatible = "nvidia,tegra210-gpio", .data = &tegra210_gpio_config },
820 { .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config },
821 { .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config },
824 MODULE_DEVICE_TABLE(of, tegra_gpio_of_match);
826 static struct platform_driver tegra_gpio_driver = {
828 .name = "tegra-gpio",
829 .pm = &tegra_gpio_pm_ops,
830 .of_match_table = tegra_gpio_of_match,
832 .probe = tegra_gpio_probe,
834 module_platform_driver(tegra_gpio_driver);
836 MODULE_DESCRIPTION("NVIDIA Tegra GPIO controller driver");
841 MODULE_LICENSE("GPL v2");