2 * arch/arm/mach-tegra/gpio.c
4 * Copyright (c) 2010 Google, Inc
7 * Erik Gilling <konkers@google.com>
9 * This software is licensed under the terms of the GNU General Public
10 * License version 2, as published by the Free Software Foundation, and
11 * may be copied, distributed, and modified under those terms.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 #include <linux/err.h>
21 #include <linux/init.h>
22 #include <linux/irq.h>
23 #include <linux/interrupt.h>
25 #include <linux/gpio.h>
26 #include <linux/of_device.h>
27 #include <linux/platform_device.h>
28 #include <linux/module.h>
29 #include <linux/irqdomain.h>
30 #include <linux/irqchip/chained_irq.h>
31 #include <linux/pinctrl/consumer.h>
34 #define GPIO_BANK(x) ((x) >> 5)
35 #define GPIO_PORT(x) (((x) >> 3) & 0x3)
36 #define GPIO_BIT(x) ((x) & 0x7)
38 #define GPIO_REG(tgi, x) (GPIO_BANK(x) * tgi->soc->bank_stride + \
41 #define GPIO_CNF(t, x) (GPIO_REG(t, x) + 0x00)
42 #define GPIO_OE(t, x) (GPIO_REG(t, x) + 0x10)
43 #define GPIO_OUT(t, x) (GPIO_REG(t, x) + 0X20)
44 #define GPIO_IN(t, x) (GPIO_REG(t, x) + 0x30)
45 #define GPIO_INT_STA(t, x) (GPIO_REG(t, x) + 0x40)
46 #define GPIO_INT_ENB(t, x) (GPIO_REG(t, x) + 0x50)
47 #define GPIO_INT_LVL(t, x) (GPIO_REG(t, x) + 0x60)
48 #define GPIO_INT_CLR(t, x) (GPIO_REG(t, x) + 0x70)
49 #define GPIO_DBC_CNT(t, x) (GPIO_REG(t, x) + 0xF0)
52 #define GPIO_MSK_CNF(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x00)
53 #define GPIO_MSK_OE(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x10)
54 #define GPIO_MSK_OUT(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0X20)
55 #define GPIO_MSK_DBC_EN(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x30)
56 #define GPIO_MSK_INT_STA(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x40)
57 #define GPIO_MSK_INT_ENB(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x50)
58 #define GPIO_MSK_INT_LVL(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x60)
60 #define GPIO_INT_LVL_MASK 0x010101
61 #define GPIO_INT_LVL_EDGE_RISING 0x000101
62 #define GPIO_INT_LVL_EDGE_FALLING 0x000100
63 #define GPIO_INT_LVL_EDGE_BOTH 0x010100
64 #define GPIO_INT_LVL_LEVEL_HIGH 0x000001
65 #define GPIO_INT_LVL_LEVEL_LOW 0x000000
67 struct tegra_gpio_info;
69 struct tegra_gpio_bank {
72 spinlock_t lvl_lock[4];
73 spinlock_t dbc_lock[4]; /* Lock for updating debounce count register */
74 #ifdef CONFIG_PM_SLEEP
84 struct tegra_gpio_info *tgi;
87 struct tegra_gpio_soc_config {
88 bool debounce_supported;
93 struct tegra_gpio_info {
96 struct irq_domain *irq_domain;
97 struct tegra_gpio_bank *bank_info;
98 const struct tegra_gpio_soc_config *soc;
104 static inline void tegra_gpio_writel(struct tegra_gpio_info *tgi,
107 __raw_writel(val, tgi->regs + reg);
110 static inline u32 tegra_gpio_readl(struct tegra_gpio_info *tgi, u32 reg)
112 return __raw_readl(tgi->regs + reg);
115 static unsigned int tegra_gpio_compose(unsigned int bank, unsigned int port,
118 return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7);
121 static void tegra_gpio_mask_write(struct tegra_gpio_info *tgi, u32 reg,
122 unsigned int gpio, u32 value)
126 val = 0x100 << GPIO_BIT(gpio);
128 val |= 1 << GPIO_BIT(gpio);
129 tegra_gpio_writel(tgi, val, reg);
132 static void tegra_gpio_enable(struct tegra_gpio_info *tgi, unsigned int gpio)
134 tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 1);
137 static void tegra_gpio_disable(struct tegra_gpio_info *tgi, unsigned int gpio)
139 tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 0);
142 static int tegra_gpio_request(struct gpio_chip *chip, unsigned int offset)
144 return pinctrl_gpio_request(offset);
147 static void tegra_gpio_free(struct gpio_chip *chip, unsigned int offset)
149 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
151 pinctrl_gpio_free(offset);
152 tegra_gpio_disable(tgi, offset);
155 static void tegra_gpio_set(struct gpio_chip *chip, unsigned int offset,
158 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
160 tegra_gpio_mask_write(tgi, GPIO_MSK_OUT(tgi, offset), offset, value);
163 static int tegra_gpio_get(struct gpio_chip *chip, unsigned int offset)
165 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
166 unsigned int bval = BIT(GPIO_BIT(offset));
168 /* If gpio is in output mode then read from the out value */
169 if (tegra_gpio_readl(tgi, GPIO_OE(tgi, offset)) & bval)
170 return !!(tegra_gpio_readl(tgi, GPIO_OUT(tgi, offset)) & bval);
172 return !!(tegra_gpio_readl(tgi, GPIO_IN(tgi, offset)) & bval);
175 static int tegra_gpio_direction_input(struct gpio_chip *chip,
178 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
180 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 0);
181 tegra_gpio_enable(tgi, offset);
185 static int tegra_gpio_direction_output(struct gpio_chip *chip,
189 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
191 tegra_gpio_set(chip, offset, value);
192 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 1);
193 tegra_gpio_enable(tgi, offset);
197 static int tegra_gpio_get_direction(struct gpio_chip *chip,
200 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
201 u32 pin_mask = BIT(GPIO_BIT(offset));
204 cnf = tegra_gpio_readl(tgi, GPIO_CNF(tgi, offset));
205 if (!(cnf & pin_mask))
208 oe = tegra_gpio_readl(tgi, GPIO_OE(tgi, offset));
210 return (oe & pin_mask) ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
213 static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
214 unsigned int debounce)
216 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
217 struct tegra_gpio_bank *bank = &tgi->bank_info[GPIO_BANK(offset)];
218 unsigned int debounce_ms = DIV_ROUND_UP(debounce, 1000);
223 tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset),
228 debounce_ms = min(debounce_ms, 255U);
229 port = GPIO_PORT(offset);
231 /* There is only one debounce count register per port and hence
232 * set the maximum of current and requested debounce time.
234 spin_lock_irqsave(&bank->dbc_lock[port], flags);
235 if (bank->dbc_cnt[port] < debounce_ms) {
236 tegra_gpio_writel(tgi, debounce_ms, GPIO_DBC_CNT(tgi, offset));
237 bank->dbc_cnt[port] = debounce_ms;
239 spin_unlock_irqrestore(&bank->dbc_lock[port], flags);
241 tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset), offset, 1);
246 static int tegra_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
247 unsigned long config)
251 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
254 debounce = pinconf_to_config_argument(config);
255 return tegra_gpio_set_debounce(chip, offset, debounce);
258 static int tegra_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
260 struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
262 return irq_find_mapping(tgi->irq_domain, offset);
265 static void tegra_gpio_irq_ack(struct irq_data *d)
267 struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
268 struct tegra_gpio_info *tgi = bank->tgi;
269 unsigned int gpio = d->hwirq;
271 tegra_gpio_writel(tgi, 1 << GPIO_BIT(gpio), GPIO_INT_CLR(tgi, gpio));
274 static void tegra_gpio_irq_mask(struct irq_data *d)
276 struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
277 struct tegra_gpio_info *tgi = bank->tgi;
278 unsigned int gpio = d->hwirq;
280 tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 0);
283 static void tegra_gpio_irq_unmask(struct irq_data *d)
285 struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
286 struct tegra_gpio_info *tgi = bank->tgi;
287 unsigned int gpio = d->hwirq;
289 tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 1);
292 static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
294 unsigned int gpio = d->hwirq, port = GPIO_PORT(gpio), lvl_type;
295 struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
296 struct tegra_gpio_info *tgi = bank->tgi;
301 switch (type & IRQ_TYPE_SENSE_MASK) {
302 case IRQ_TYPE_EDGE_RISING:
303 lvl_type = GPIO_INT_LVL_EDGE_RISING;
306 case IRQ_TYPE_EDGE_FALLING:
307 lvl_type = GPIO_INT_LVL_EDGE_FALLING;
310 case IRQ_TYPE_EDGE_BOTH:
311 lvl_type = GPIO_INT_LVL_EDGE_BOTH;
314 case IRQ_TYPE_LEVEL_HIGH:
315 lvl_type = GPIO_INT_LVL_LEVEL_HIGH;
318 case IRQ_TYPE_LEVEL_LOW:
319 lvl_type = GPIO_INT_LVL_LEVEL_LOW;
326 ret = gpiochip_lock_as_irq(&tgi->gc, gpio);
329 "unable to lock Tegra GPIO %u as IRQ\n", gpio);
333 spin_lock_irqsave(&bank->lvl_lock[port], flags);
335 val = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
336 val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio));
337 val |= lvl_type << GPIO_BIT(gpio);
338 tegra_gpio_writel(tgi, val, GPIO_INT_LVL(tgi, gpio));
340 spin_unlock_irqrestore(&bank->lvl_lock[port], flags);
342 tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, gpio), gpio, 0);
343 tegra_gpio_enable(tgi, gpio);
345 if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
346 irq_set_handler_locked(d, handle_level_irq);
347 else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
348 irq_set_handler_locked(d, handle_edge_irq);
353 static void tegra_gpio_irq_shutdown(struct irq_data *d)
355 struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
356 struct tegra_gpio_info *tgi = bank->tgi;
357 unsigned int gpio = d->hwirq;
359 gpiochip_unlock_as_irq(&tgi->gc, gpio);
362 static void tegra_gpio_irq_handler(struct irq_desc *desc)
364 unsigned int port, pin, gpio;
365 bool unmasked = false;
368 struct irq_chip *chip = irq_desc_get_chip(desc);
369 struct tegra_gpio_bank *bank = irq_desc_get_handler_data(desc);
370 struct tegra_gpio_info *tgi = bank->tgi;
372 chained_irq_enter(chip, desc);
374 for (port = 0; port < 4; port++) {
375 gpio = tegra_gpio_compose(bank->bank, port, 0);
376 sta = tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)) &
377 tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio));
378 lvl = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
380 for_each_set_bit(pin, &sta, 8) {
381 tegra_gpio_writel(tgi, 1 << pin,
382 GPIO_INT_CLR(tgi, gpio));
384 /* if gpio is edge triggered, clear condition
385 * before executing the handler so that we don't
388 if (!unmasked && lvl & (0x100 << pin)) {
390 chained_irq_exit(chip, desc);
393 generic_handle_irq(irq_find_mapping(tgi->irq_domain,
399 chained_irq_exit(chip, desc);
403 #ifdef CONFIG_PM_SLEEP
404 static int tegra_gpio_resume(struct device *dev)
406 struct platform_device *pdev = to_platform_device(dev);
407 struct tegra_gpio_info *tgi = platform_get_drvdata(pdev);
411 local_irq_save(flags);
413 for (b = 0; b < tgi->bank_count; b++) {
414 struct tegra_gpio_bank *bank = &tgi->bank_info[b];
416 for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
417 unsigned int gpio = (b << 5) | (p << 3);
419 tegra_gpio_writel(tgi, bank->cnf[p],
420 GPIO_CNF(tgi, gpio));
422 if (tgi->soc->debounce_supported) {
423 tegra_gpio_writel(tgi, bank->dbc_cnt[p],
424 GPIO_DBC_CNT(tgi, gpio));
425 tegra_gpio_writel(tgi, bank->dbc_enb[p],
426 GPIO_MSK_DBC_EN(tgi, gpio));
429 tegra_gpio_writel(tgi, bank->out[p],
430 GPIO_OUT(tgi, gpio));
431 tegra_gpio_writel(tgi, bank->oe[p],
433 tegra_gpio_writel(tgi, bank->int_lvl[p],
434 GPIO_INT_LVL(tgi, gpio));
435 tegra_gpio_writel(tgi, bank->int_enb[p],
436 GPIO_INT_ENB(tgi, gpio));
440 local_irq_restore(flags);
444 static int tegra_gpio_suspend(struct device *dev)
446 struct platform_device *pdev = to_platform_device(dev);
447 struct tegra_gpio_info *tgi = platform_get_drvdata(pdev);
451 local_irq_save(flags);
452 for (b = 0; b < tgi->bank_count; b++) {
453 struct tegra_gpio_bank *bank = &tgi->bank_info[b];
455 for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
456 unsigned int gpio = (b << 5) | (p << 3);
458 bank->cnf[p] = tegra_gpio_readl(tgi,
459 GPIO_CNF(tgi, gpio));
460 bank->out[p] = tegra_gpio_readl(tgi,
461 GPIO_OUT(tgi, gpio));
462 bank->oe[p] = tegra_gpio_readl(tgi,
464 if (tgi->soc->debounce_supported) {
465 bank->dbc_enb[p] = tegra_gpio_readl(tgi,
466 GPIO_MSK_DBC_EN(tgi, gpio));
467 bank->dbc_enb[p] = (bank->dbc_enb[p] << 8) |
471 bank->int_enb[p] = tegra_gpio_readl(tgi,
472 GPIO_INT_ENB(tgi, gpio));
473 bank->int_lvl[p] = tegra_gpio_readl(tgi,
474 GPIO_INT_LVL(tgi, gpio));
476 /* Enable gpio irq for wake up source */
477 tegra_gpio_writel(tgi, bank->wake_enb[p],
478 GPIO_INT_ENB(tgi, gpio));
481 local_irq_restore(flags);
485 static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
487 struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
488 unsigned int gpio = d->hwirq;
491 port = GPIO_PORT(gpio);
492 bit = GPIO_BIT(gpio);
496 bank->wake_enb[port] |= mask;
498 bank->wake_enb[port] &= ~mask;
500 return irq_set_irq_wake(bank->irq, enable);
504 #ifdef CONFIG_DEBUG_FS
506 #include <linux/debugfs.h>
507 #include <linux/seq_file.h>
509 static int dbg_gpio_show(struct seq_file *s, void *unused)
511 struct tegra_gpio_info *tgi = s->private;
514 for (i = 0; i < tgi->bank_count; i++) {
515 for (j = 0; j < 4; j++) {
516 unsigned int gpio = tegra_gpio_compose(i, j, 0);
519 "%u:%u %02x %02x %02x %02x %02x %02x %06x\n",
521 tegra_gpio_readl(tgi, GPIO_CNF(tgi, gpio)),
522 tegra_gpio_readl(tgi, GPIO_OE(tgi, gpio)),
523 tegra_gpio_readl(tgi, GPIO_OUT(tgi, gpio)),
524 tegra_gpio_readl(tgi, GPIO_IN(tgi, gpio)),
525 tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)),
526 tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio)),
527 tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio)));
533 static int dbg_gpio_open(struct inode *inode, struct file *file)
535 return single_open(file, dbg_gpio_show, inode->i_private);
538 static const struct file_operations debug_fops = {
539 .open = dbg_gpio_open,
542 .release = single_release,
545 static void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
547 (void) debugfs_create_file("tegra_gpio", 0444,
548 NULL, tgi, &debug_fops);
553 static inline void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
559 static const struct dev_pm_ops tegra_gpio_pm_ops = {
560 SET_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume)
564 * This lock class tells lockdep that GPIO irqs are in a different category
565 * than their parents, so it won't report false recursion.
567 static struct lock_class_key gpio_lock_class;
568 static struct lock_class_key gpio_request_class;
570 static int tegra_gpio_probe(struct platform_device *pdev)
572 struct tegra_gpio_info *tgi;
573 struct resource *res;
574 struct tegra_gpio_bank *bank;
575 unsigned int gpio, i, j;
578 tgi = devm_kzalloc(&pdev->dev, sizeof(*tgi), GFP_KERNEL);
582 tgi->soc = of_device_get_match_data(&pdev->dev);
583 tgi->dev = &pdev->dev;
585 ret = platform_irq_count(pdev);
589 tgi->bank_count = ret;
591 if (!tgi->bank_count) {
592 dev_err(&pdev->dev, "Missing IRQ resource\n");
596 tgi->gc.label = "tegra-gpio";
597 tgi->gc.request = tegra_gpio_request;
598 tgi->gc.free = tegra_gpio_free;
599 tgi->gc.direction_input = tegra_gpio_direction_input;
600 tgi->gc.get = tegra_gpio_get;
601 tgi->gc.direction_output = tegra_gpio_direction_output;
602 tgi->gc.set = tegra_gpio_set;
603 tgi->gc.get_direction = tegra_gpio_get_direction;
604 tgi->gc.to_irq = tegra_gpio_to_irq;
606 tgi->gc.ngpio = tgi->bank_count * 32;
607 tgi->gc.parent = &pdev->dev;
608 tgi->gc.of_node = pdev->dev.of_node;
610 tgi->ic.name = "GPIO";
611 tgi->ic.irq_ack = tegra_gpio_irq_ack;
612 tgi->ic.irq_mask = tegra_gpio_irq_mask;
613 tgi->ic.irq_unmask = tegra_gpio_irq_unmask;
614 tgi->ic.irq_set_type = tegra_gpio_irq_set_type;
615 tgi->ic.irq_shutdown = tegra_gpio_irq_shutdown;
616 #ifdef CONFIG_PM_SLEEP
617 tgi->ic.irq_set_wake = tegra_gpio_irq_set_wake;
620 platform_set_drvdata(pdev, tgi);
622 if (tgi->soc->debounce_supported)
623 tgi->gc.set_config = tegra_gpio_set_config;
625 tgi->bank_info = devm_kcalloc(&pdev->dev, tgi->bank_count,
626 sizeof(*tgi->bank_info), GFP_KERNEL);
630 tgi->irq_domain = irq_domain_add_linear(pdev->dev.of_node,
632 &irq_domain_simple_ops, NULL);
633 if (!tgi->irq_domain)
636 for (i = 0; i < tgi->bank_count; i++) {
637 ret = platform_get_irq(pdev, i);
639 dev_err(&pdev->dev, "Missing IRQ resource: %d\n", ret);
643 bank = &tgi->bank_info[i];
649 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
650 tgi->regs = devm_ioremap_resource(&pdev->dev, res);
651 if (IS_ERR(tgi->regs))
652 return PTR_ERR(tgi->regs);
654 for (i = 0; i < tgi->bank_count; i++) {
655 for (j = 0; j < 4; j++) {
656 int gpio = tegra_gpio_compose(i, j, 0);
658 tegra_gpio_writel(tgi, 0x00, GPIO_INT_ENB(tgi, gpio));
662 ret = devm_gpiochip_add_data(&pdev->dev, &tgi->gc, tgi);
664 irq_domain_remove(tgi->irq_domain);
668 for (gpio = 0; gpio < tgi->gc.ngpio; gpio++) {
669 int irq = irq_create_mapping(tgi->irq_domain, gpio);
670 /* No validity check; all Tegra GPIOs are valid IRQs */
672 bank = &tgi->bank_info[GPIO_BANK(gpio)];
674 irq_set_lockdep_class(irq, &gpio_lock_class,
675 &gpio_request_class);
676 irq_set_chip_data(irq, bank);
677 irq_set_chip_and_handler(irq, &tgi->ic, handle_simple_irq);
680 for (i = 0; i < tgi->bank_count; i++) {
681 bank = &tgi->bank_info[i];
683 irq_set_chained_handler_and_data(bank->irq,
684 tegra_gpio_irq_handler, bank);
686 for (j = 0; j < 4; j++) {
687 spin_lock_init(&bank->lvl_lock[j]);
688 spin_lock_init(&bank->dbc_lock[j]);
692 tegra_gpio_debuginit(tgi);
697 static const struct tegra_gpio_soc_config tegra20_gpio_config = {
699 .upper_offset = 0x800,
702 static const struct tegra_gpio_soc_config tegra30_gpio_config = {
703 .bank_stride = 0x100,
704 .upper_offset = 0x80,
707 static const struct tegra_gpio_soc_config tegra210_gpio_config = {
708 .debounce_supported = true,
709 .bank_stride = 0x100,
710 .upper_offset = 0x80,
713 static const struct of_device_id tegra_gpio_of_match[] = {
714 { .compatible = "nvidia,tegra210-gpio", .data = &tegra210_gpio_config },
715 { .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config },
716 { .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config },
720 static struct platform_driver tegra_gpio_driver = {
722 .name = "tegra-gpio",
723 .pm = &tegra_gpio_pm_ops,
724 .of_match_table = tegra_gpio_of_match,
726 .probe = tegra_gpio_probe,
729 static int __init tegra_gpio_init(void)
731 return platform_driver_register(&tegra_gpio_driver);
733 postcore_initcall(tegra_gpio_init);