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.
9 * Erik Gilling <konkers@google.com>
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>
18 #include <linux/of_device.h>
19 #include <linux/platform_device.h>
20 #include <linux/module.h>
21 #include <linux/irqdomain.h>
22 #include <linux/irqchip/chained_irq.h>
23 #include <linux/pinctrl/consumer.h>
26 #define GPIO_BANK(x) ((x) >> 5)
27 #define GPIO_PORT(x) (((x) >> 3) & 0x3)
28 #define GPIO_BIT(x) ((x) & 0x7)
30 #define GPIO_REG(tgi, x) (GPIO_BANK(x) * tgi->soc->bank_stride + \
33 #define GPIO_CNF(t, x) (GPIO_REG(t, x) + 0x00)
34 #define GPIO_OE(t, x) (GPIO_REG(t, x) + 0x10)
35 #define GPIO_OUT(t, x) (GPIO_REG(t, x) + 0X20)
36 #define GPIO_IN(t, x) (GPIO_REG(t, x) + 0x30)
37 #define GPIO_INT_STA(t, x) (GPIO_REG(t, x) + 0x40)
38 #define GPIO_INT_ENB(t, x) (GPIO_REG(t, x) + 0x50)
39 #define GPIO_INT_LVL(t, x) (GPIO_REG(t, x) + 0x60)
40 #define GPIO_INT_CLR(t, x) (GPIO_REG(t, x) + 0x70)
41 #define GPIO_DBC_CNT(t, x) (GPIO_REG(t, x) + 0xF0)
44 #define GPIO_MSK_CNF(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x00)
45 #define GPIO_MSK_OE(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x10)
46 #define GPIO_MSK_OUT(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0X20)
47 #define GPIO_MSK_DBC_EN(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x30)
48 #define GPIO_MSK_INT_STA(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x40)
49 #define GPIO_MSK_INT_ENB(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x50)
50 #define GPIO_MSK_INT_LVL(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x60)
52 #define GPIO_INT_LVL_MASK 0x010101
53 #define GPIO_INT_LVL_EDGE_RISING 0x000101
54 #define GPIO_INT_LVL_EDGE_FALLING 0x000100
55 #define GPIO_INT_LVL_EDGE_BOTH 0x010100
56 #define GPIO_INT_LVL_LEVEL_HIGH 0x000001
57 #define GPIO_INT_LVL_LEVEL_LOW 0x000000
59 struct tegra_gpio_info;
61 struct tegra_gpio_bank {
65 * IRQ-core code uses raw locking, and thus, nested locking also
66 * should be raw in order not to trip spinlock debug warnings.
68 raw_spinlock_t lvl_lock[4];
70 /* Lock for updating debounce count register */
71 spinlock_t dbc_lock[4];
73 #ifdef CONFIG_PM_SLEEP
85 struct tegra_gpio_soc_config {
86 bool debounce_supported;
91 struct tegra_gpio_info {
94 struct tegra_gpio_bank *bank_info;
95 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 int tegra_gpio_request(struct gpio_chip *chip, unsigned int offset)
142 return pinctrl_gpio_request(chip->base + offset);
145 static void tegra_gpio_free(struct gpio_chip *chip, unsigned int offset)
147 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
149 pinctrl_gpio_free(chip->base + offset);
150 tegra_gpio_disable(tgi, offset);
153 static void tegra_gpio_set(struct gpio_chip *chip, unsigned int offset,
156 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
158 tegra_gpio_mask_write(tgi, GPIO_MSK_OUT(tgi, offset), offset, value);
161 static int tegra_gpio_get(struct gpio_chip *chip, unsigned int offset)
163 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
164 unsigned int bval = BIT(GPIO_BIT(offset));
166 /* If gpio is in output mode then read from the out value */
167 if (tegra_gpio_readl(tgi, GPIO_OE(tgi, offset)) & bval)
168 return !!(tegra_gpio_readl(tgi, GPIO_OUT(tgi, offset)) & bval);
170 return !!(tegra_gpio_readl(tgi, GPIO_IN(tgi, offset)) & bval);
173 static int tegra_gpio_direction_input(struct gpio_chip *chip,
176 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
179 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 0);
180 tegra_gpio_enable(tgi, offset);
182 ret = pinctrl_gpio_direction_input(chip->base + offset);
185 "Failed to set pinctrl input direction of GPIO %d: %d",
186 chip->base + offset, ret);
191 static int tegra_gpio_direction_output(struct gpio_chip *chip,
195 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
198 tegra_gpio_set(chip, offset, value);
199 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 1);
200 tegra_gpio_enable(tgi, offset);
202 ret = pinctrl_gpio_direction_output(chip->base + offset);
205 "Failed to set pinctrl output direction of GPIO %d: %d",
206 chip->base + offset, ret);
211 static int tegra_gpio_get_direction(struct gpio_chip *chip,
214 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
215 u32 pin_mask = BIT(GPIO_BIT(offset));
218 cnf = tegra_gpio_readl(tgi, GPIO_CNF(tgi, offset));
219 if (!(cnf & pin_mask))
222 oe = tegra_gpio_readl(tgi, GPIO_OE(tgi, offset));
225 return GPIO_LINE_DIRECTION_OUT;
227 return GPIO_LINE_DIRECTION_IN;
230 static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
231 unsigned int debounce)
233 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
234 struct tegra_gpio_bank *bank = &tgi->bank_info[GPIO_BANK(offset)];
235 unsigned int debounce_ms = DIV_ROUND_UP(debounce, 1000);
240 tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset),
245 debounce_ms = min(debounce_ms, 255U);
246 port = GPIO_PORT(offset);
248 /* There is only one debounce count register per port and hence
249 * set the maximum of current and requested debounce time.
251 spin_lock_irqsave(&bank->dbc_lock[port], flags);
252 if (bank->dbc_cnt[port] < debounce_ms) {
253 tegra_gpio_writel(tgi, debounce_ms, GPIO_DBC_CNT(tgi, offset));
254 bank->dbc_cnt[port] = debounce_ms;
256 spin_unlock_irqrestore(&bank->dbc_lock[port], flags);
258 tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset), offset, 1);
263 static int tegra_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
264 unsigned long config)
268 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
271 debounce = pinconf_to_config_argument(config);
272 return tegra_gpio_set_debounce(chip, offset, debounce);
275 static void tegra_gpio_irq_ack(struct irq_data *d)
277 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
278 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
279 unsigned int gpio = d->hwirq;
281 tegra_gpio_writel(tgi, 1 << GPIO_BIT(gpio), GPIO_INT_CLR(tgi, gpio));
284 static void tegra_gpio_irq_mask(struct irq_data *d)
286 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
287 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
288 unsigned int gpio = d->hwirq;
290 tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 0);
293 static void tegra_gpio_irq_unmask(struct irq_data *d)
295 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
296 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
297 unsigned int gpio = d->hwirq;
299 tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 1);
302 static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
304 unsigned int gpio = d->hwirq, port = GPIO_PORT(gpio), lvl_type;
305 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
306 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
307 struct tegra_gpio_bank *bank;
312 bank = &tgi->bank_info[GPIO_BANK(d->hwirq)];
314 switch (type & IRQ_TYPE_SENSE_MASK) {
315 case IRQ_TYPE_EDGE_RISING:
316 lvl_type = GPIO_INT_LVL_EDGE_RISING;
319 case IRQ_TYPE_EDGE_FALLING:
320 lvl_type = GPIO_INT_LVL_EDGE_FALLING;
323 case IRQ_TYPE_EDGE_BOTH:
324 lvl_type = GPIO_INT_LVL_EDGE_BOTH;
327 case IRQ_TYPE_LEVEL_HIGH:
328 lvl_type = GPIO_INT_LVL_LEVEL_HIGH;
331 case IRQ_TYPE_LEVEL_LOW:
332 lvl_type = GPIO_INT_LVL_LEVEL_LOW;
339 raw_spin_lock_irqsave(&bank->lvl_lock[port], flags);
341 val = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
342 val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio));
343 val |= lvl_type << GPIO_BIT(gpio);
344 tegra_gpio_writel(tgi, val, GPIO_INT_LVL(tgi, gpio));
346 raw_spin_unlock_irqrestore(&bank->lvl_lock[port], flags);
348 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, gpio), gpio, 0);
349 tegra_gpio_enable(tgi, gpio);
351 ret = gpiochip_lock_as_irq(&tgi->gc, gpio);
354 "unable to lock Tegra GPIO %u as IRQ\n", gpio);
355 tegra_gpio_disable(tgi, gpio);
359 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
360 irq_set_handler_locked(d, handle_level_irq);
361 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
362 irq_set_handler_locked(d, handle_edge_irq);
365 ret = irq_chip_set_type_parent(d, type);
370 static void tegra_gpio_irq_shutdown(struct irq_data *d)
372 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
373 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
374 unsigned int gpio = d->hwirq;
376 tegra_gpio_irq_mask(d);
377 gpiochip_unlock_as_irq(&tgi->gc, gpio);
380 static void tegra_gpio_irq_handler(struct irq_desc *desc)
382 struct tegra_gpio_info *tgi = irq_desc_get_handler_data(desc);
383 struct irq_chip *chip = irq_desc_get_chip(desc);
384 struct irq_domain *domain = tgi->gc.irq.domain;
385 unsigned int irq = irq_desc_get_irq(desc);
386 struct tegra_gpio_bank *bank = NULL;
387 unsigned int port, pin, gpio, i;
388 bool unmasked = false;
392 for (i = 0; i < tgi->bank_count; i++) {
393 if (tgi->irqs[i] == irq) {
394 bank = &tgi->bank_info[i];
399 if (WARN_ON(bank == NULL))
402 chained_irq_enter(chip, desc);
404 for (port = 0; port < 4; port++) {
405 gpio = tegra_gpio_compose(bank->bank, port, 0);
406 sta = tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)) &
407 tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio));
408 lvl = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
410 for_each_set_bit(pin, &sta, 8) {
413 tegra_gpio_writel(tgi, 1 << pin,
414 GPIO_INT_CLR(tgi, gpio));
416 /* if gpio is edge triggered, clear condition
417 * before executing the handler so that we don't
420 if (!unmasked && lvl & (0x100 << pin)) {
422 chained_irq_exit(chip, desc);
425 ret = generic_handle_domain_irq(domain, gpio + pin);
426 WARN_RATELIMIT(ret, "hwirq = %d", gpio + pin);
431 chained_irq_exit(chip, desc);
434 static int tegra_gpio_child_to_parent_hwirq(struct gpio_chip *chip,
437 unsigned int *parent_hwirq,
438 unsigned int *parent_type)
440 *parent_hwirq = chip->irq.child_offset_to_irq(chip, hwirq);
446 static void *tegra_gpio_populate_parent_fwspec(struct gpio_chip *chip,
447 unsigned int parent_hwirq,
448 unsigned int parent_type)
450 struct irq_fwspec *fwspec;
452 fwspec = kmalloc(sizeof(*fwspec), GFP_KERNEL);
456 fwspec->fwnode = chip->irq.parent_domain->fwnode;
457 fwspec->param_count = 3;
458 fwspec->param[0] = 0;
459 fwspec->param[1] = parent_hwirq;
460 fwspec->param[2] = parent_type;
465 #ifdef CONFIG_PM_SLEEP
466 static int tegra_gpio_resume(struct device *dev)
468 struct tegra_gpio_info *tgi = dev_get_drvdata(dev);
471 for (b = 0; b < tgi->bank_count; b++) {
472 struct tegra_gpio_bank *bank = &tgi->bank_info[b];
474 for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
475 unsigned int gpio = (b << 5) | (p << 3);
477 tegra_gpio_writel(tgi, bank->cnf[p],
478 GPIO_CNF(tgi, gpio));
480 if (tgi->soc->debounce_supported) {
481 tegra_gpio_writel(tgi, bank->dbc_cnt[p],
482 GPIO_DBC_CNT(tgi, gpio));
483 tegra_gpio_writel(tgi, bank->dbc_enb[p],
484 GPIO_MSK_DBC_EN(tgi, gpio));
487 tegra_gpio_writel(tgi, bank->out[p],
488 GPIO_OUT(tgi, gpio));
489 tegra_gpio_writel(tgi, bank->oe[p],
491 tegra_gpio_writel(tgi, bank->int_lvl[p],
492 GPIO_INT_LVL(tgi, gpio));
493 tegra_gpio_writel(tgi, bank->int_enb[p],
494 GPIO_INT_ENB(tgi, gpio));
501 static int tegra_gpio_suspend(struct device *dev)
503 struct tegra_gpio_info *tgi = dev_get_drvdata(dev);
506 for (b = 0; b < tgi->bank_count; b++) {
507 struct tegra_gpio_bank *bank = &tgi->bank_info[b];
509 for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
510 unsigned int gpio = (b << 5) | (p << 3);
512 bank->cnf[p] = tegra_gpio_readl(tgi,
513 GPIO_CNF(tgi, gpio));
514 bank->out[p] = tegra_gpio_readl(tgi,
515 GPIO_OUT(tgi, gpio));
516 bank->oe[p] = tegra_gpio_readl(tgi,
518 if (tgi->soc->debounce_supported) {
519 bank->dbc_enb[p] = tegra_gpio_readl(tgi,
520 GPIO_MSK_DBC_EN(tgi, gpio));
521 bank->dbc_enb[p] = (bank->dbc_enb[p] << 8) |
525 bank->int_enb[p] = tegra_gpio_readl(tgi,
526 GPIO_INT_ENB(tgi, gpio));
527 bank->int_lvl[p] = tegra_gpio_readl(tgi,
528 GPIO_INT_LVL(tgi, gpio));
530 /* Enable gpio irq for wake up source */
531 tegra_gpio_writel(tgi, bank->wake_enb[p],
532 GPIO_INT_ENB(tgi, gpio));
539 static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
541 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
542 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
543 struct tegra_gpio_bank *bank;
544 unsigned int gpio = d->hwirq;
548 bank = &tgi->bank_info[GPIO_BANK(d->hwirq)];
550 port = GPIO_PORT(gpio);
551 bit = GPIO_BIT(gpio);
554 err = irq_set_irq_wake(tgi->irqs[bank->bank], enable);
558 if (d->parent_data) {
559 err = irq_chip_set_wake_parent(d, enable);
561 irq_set_irq_wake(tgi->irqs[bank->bank], !enable);
567 bank->wake_enb[port] |= mask;
569 bank->wake_enb[port] &= ~mask;
575 static int tegra_gpio_irq_set_affinity(struct irq_data *data,
576 const struct cpumask *dest,
579 if (data->parent_data)
580 return irq_chip_set_affinity_parent(data, dest, force);
585 static int tegra_gpio_irq_request_resources(struct irq_data *d)
587 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
588 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
590 tegra_gpio_enable(tgi, d->hwirq);
592 return gpiochip_reqres_irq(chip, d->hwirq);
595 static void tegra_gpio_irq_release_resources(struct irq_data *d)
597 struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
598 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
600 gpiochip_relres_irq(chip, d->hwirq);
601 tegra_gpio_enable(tgi, d->hwirq);
604 #ifdef CONFIG_DEBUG_FS
606 #include <linux/debugfs.h>
607 #include <linux/seq_file.h>
609 static int tegra_dbg_gpio_show(struct seq_file *s, void *unused)
611 struct tegra_gpio_info *tgi = dev_get_drvdata(s->private);
614 for (i = 0; i < tgi->bank_count; i++) {
615 for (j = 0; j < 4; j++) {
616 unsigned int gpio = tegra_gpio_compose(i, j, 0);
619 "%u:%u %02x %02x %02x %02x %02x %02x %06x\n",
621 tegra_gpio_readl(tgi, GPIO_CNF(tgi, gpio)),
622 tegra_gpio_readl(tgi, GPIO_OE(tgi, gpio)),
623 tegra_gpio_readl(tgi, GPIO_OUT(tgi, gpio)),
624 tegra_gpio_readl(tgi, GPIO_IN(tgi, gpio)),
625 tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)),
626 tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio)),
627 tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio)));
633 static void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
635 debugfs_create_devm_seqfile(tgi->dev, "tegra_gpio", NULL,
636 tegra_dbg_gpio_show);
641 static inline void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
647 static const struct dev_pm_ops tegra_gpio_pm_ops = {
648 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume)
651 static const struct of_device_id tegra_pmc_of_match[] = {
652 { .compatible = "nvidia,tegra210-pmc", },
656 static int tegra_gpio_probe(struct platform_device *pdev)
658 struct tegra_gpio_bank *bank;
659 struct tegra_gpio_info *tgi;
660 struct gpio_irq_chip *irq;
661 struct device_node *np;
665 tgi = devm_kzalloc(&pdev->dev, sizeof(*tgi), GFP_KERNEL);
669 tgi->soc = of_device_get_match_data(&pdev->dev);
670 tgi->dev = &pdev->dev;
672 ret = platform_irq_count(pdev);
676 tgi->bank_count = ret;
678 if (!tgi->bank_count) {
679 dev_err(&pdev->dev, "Missing IRQ resource\n");
683 tgi->gc.label = "tegra-gpio";
684 tgi->gc.request = tegra_gpio_request;
685 tgi->gc.free = tegra_gpio_free;
686 tgi->gc.direction_input = tegra_gpio_direction_input;
687 tgi->gc.get = tegra_gpio_get;
688 tgi->gc.direction_output = tegra_gpio_direction_output;
689 tgi->gc.set = tegra_gpio_set;
690 tgi->gc.get_direction = tegra_gpio_get_direction;
692 tgi->gc.ngpio = tgi->bank_count * 32;
693 tgi->gc.parent = &pdev->dev;
695 tgi->ic.name = "GPIO";
696 tgi->ic.irq_ack = tegra_gpio_irq_ack;
697 tgi->ic.irq_mask = tegra_gpio_irq_mask;
698 tgi->ic.irq_unmask = tegra_gpio_irq_unmask;
699 tgi->ic.irq_set_type = tegra_gpio_irq_set_type;
700 tgi->ic.irq_shutdown = tegra_gpio_irq_shutdown;
701 #ifdef CONFIG_PM_SLEEP
702 tgi->ic.irq_set_wake = tegra_gpio_irq_set_wake;
704 tgi->ic.irq_request_resources = tegra_gpio_irq_request_resources;
705 tgi->ic.irq_release_resources = tegra_gpio_irq_release_resources;
707 platform_set_drvdata(pdev, tgi);
709 if (tgi->soc->debounce_supported)
710 tgi->gc.set_config = tegra_gpio_set_config;
712 tgi->bank_info = devm_kcalloc(&pdev->dev, tgi->bank_count,
713 sizeof(*tgi->bank_info), GFP_KERNEL);
717 tgi->irqs = devm_kcalloc(&pdev->dev, tgi->bank_count,
718 sizeof(*tgi->irqs), GFP_KERNEL);
722 for (i = 0; i < tgi->bank_count; i++) {
723 ret = platform_get_irq(pdev, i);
727 bank = &tgi->bank_info[i];
732 for (j = 0; j < 4; j++) {
733 raw_spin_lock_init(&bank->lvl_lock[j]);
734 spin_lock_init(&bank->dbc_lock[j]);
739 irq->chip = &tgi->ic;
740 irq->fwnode = of_node_to_fwnode(pdev->dev.of_node);
741 irq->child_to_parent_hwirq = tegra_gpio_child_to_parent_hwirq;
742 irq->populate_parent_alloc_arg = tegra_gpio_populate_parent_fwspec;
743 irq->handler = handle_simple_irq;
744 irq->default_type = IRQ_TYPE_NONE;
745 irq->parent_handler = tegra_gpio_irq_handler;
746 irq->parent_handler_data = tgi;
747 irq->num_parents = tgi->bank_count;
748 irq->parents = tgi->irqs;
750 np = of_find_matching_node(NULL, tegra_pmc_of_match);
752 irq->parent_domain = irq_find_host(np);
755 if (!irq->parent_domain)
756 return -EPROBE_DEFER;
758 tgi->ic.irq_set_affinity = tegra_gpio_irq_set_affinity;
761 tgi->regs = devm_platform_ioremap_resource(pdev, 0);
762 if (IS_ERR(tgi->regs))
763 return PTR_ERR(tgi->regs);
765 for (i = 0; i < tgi->bank_count; i++) {
766 for (j = 0; j < 4; j++) {
767 int gpio = tegra_gpio_compose(i, j, 0);
769 tegra_gpio_writel(tgi, 0x00, GPIO_INT_ENB(tgi, gpio));
773 ret = devm_gpiochip_add_data(&pdev->dev, &tgi->gc, tgi);
777 tegra_gpio_debuginit(tgi);
782 static const struct tegra_gpio_soc_config tegra20_gpio_config = {
784 .upper_offset = 0x800,
787 static const struct tegra_gpio_soc_config tegra30_gpio_config = {
788 .bank_stride = 0x100,
789 .upper_offset = 0x80,
792 static const struct tegra_gpio_soc_config tegra210_gpio_config = {
793 .debounce_supported = true,
794 .bank_stride = 0x100,
795 .upper_offset = 0x80,
798 static const struct of_device_id tegra_gpio_of_match[] = {
799 { .compatible = "nvidia,tegra210-gpio", .data = &tegra210_gpio_config },
800 { .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config },
801 { .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config },
804 MODULE_DEVICE_TABLE(of, tegra_gpio_of_match);
806 static struct platform_driver tegra_gpio_driver = {
808 .name = "tegra-gpio",
809 .pm = &tegra_gpio_pm_ops,
810 .of_match_table = tegra_gpio_of_match,
812 .probe = tegra_gpio_probe,
814 module_platform_driver(tegra_gpio_driver);
816 MODULE_DESCRIPTION("NVIDIA Tegra GPIO controller driver");
817 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
818 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
819 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
820 MODULE_AUTHOR("Erik Gilling <konkers@google.com>");
821 MODULE_LICENSE("GPL v2");