// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2016-2017 NVIDIA Corporation * * Author: Thierry Reding <treding@nvidia.com> */ #include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <dt-bindings/gpio/tegra186-gpio.h> #include <dt-bindings/gpio/tegra194-gpio.h> #define TEGRA186_GPIO_ENABLE_CONFIG 0x00 #define TEGRA186_GPIO_ENABLE_CONFIG_ENABLE BIT(0) #define TEGRA186_GPIO_ENABLE_CONFIG_OUT BIT(1) #define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_NONE (0x0 << 2) #define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL (0x1 << 2) #define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE (0x2 << 2) #define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE (0x3 << 2) #define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK (0x3 << 2) #define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL BIT(4) #define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT BIT(6) #define TEGRA186_GPIO_DEBOUNCE_CONTROL 0x04 #define TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(x) ((x) & 0xff) #define TEGRA186_GPIO_INPUT 0x08 #define TEGRA186_GPIO_INPUT_HIGH BIT(0) #define TEGRA186_GPIO_OUTPUT_CONTROL 0x0c #define TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED BIT(0) #define TEGRA186_GPIO_OUTPUT_VALUE 0x10 #define TEGRA186_GPIO_OUTPUT_VALUE_HIGH BIT(0) #define TEGRA186_GPIO_INTERRUPT_CLEAR 0x14 #define TEGRA186_GPIO_INTERRUPT_STATUS(x) (0x100 + (x) * 4) struct tegra_gpio_port { const char *name; unsigned int offset; unsigned int pins; unsigned int irq; }; struct tegra_gpio_soc { const struct tegra_gpio_port *ports; unsigned int num_ports; const char *name; }; struct tegra_gpio { struct gpio_chip gpio; struct irq_chip intc; unsigned int num_irq; unsigned int *irq; const struct tegra_gpio_soc *soc; void __iomem *base; }; static const struct tegra_gpio_port * tegra186_gpio_get_port(struct tegra_gpio *gpio, unsigned int *pin) { unsigned int start = 0, i; for (i = 0; i < gpio->soc->num_ports; i++) { const struct tegra_gpio_port *port = &gpio->soc->ports[i]; if (*pin >= start && *pin < start + port->pins) { *pin -= start; return port; } start += port->pins; } return NULL; } static void __iomem *tegra186_gpio_get_base(struct tegra_gpio *gpio, unsigned int pin) { const struct tegra_gpio_port *port; port = tegra186_gpio_get_port(gpio, &pin); if (!port) return NULL; return gpio->base + port->offset + pin * 0x20; } static int tegra186_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) { struct tegra_gpio *gpio = gpiochip_get_data(chip); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, offset); if (WARN_ON(base == NULL)) return -ENODEV; value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT) return 0; return 1; } static int tegra186_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { struct tegra_gpio *gpio = gpiochip_get_data(chip); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, offset); if (WARN_ON(base == NULL)) return -ENODEV; value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL); value |= TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED; writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL); value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE; value &= ~TEGRA186_GPIO_ENABLE_CONFIG_OUT; writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); return 0; } static int tegra186_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int level) { struct tegra_gpio *gpio = gpiochip_get_data(chip); void __iomem *base; u32 value; /* configure output level first */ chip->set(chip, offset, level); base = tegra186_gpio_get_base(gpio, offset); if (WARN_ON(base == NULL)) return -EINVAL; /* set the direction */ value = readl(base + TEGRA186_GPIO_OUTPUT_CONTROL); value &= ~TEGRA186_GPIO_OUTPUT_CONTROL_FLOATED; writel(value, base + TEGRA186_GPIO_OUTPUT_CONTROL); value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); value |= TEGRA186_GPIO_ENABLE_CONFIG_ENABLE; value |= TEGRA186_GPIO_ENABLE_CONFIG_OUT; writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); return 0; } static int tegra186_gpio_get(struct gpio_chip *chip, unsigned int offset) { struct tegra_gpio *gpio = gpiochip_get_data(chip); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, offset); if (WARN_ON(base == NULL)) return -ENODEV; value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); if (value & TEGRA186_GPIO_ENABLE_CONFIG_OUT) value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE); else value = readl(base + TEGRA186_GPIO_INPUT); return value & BIT(0); } static void tegra186_gpio_set(struct gpio_chip *chip, unsigned int offset, int level) { struct tegra_gpio *gpio = gpiochip_get_data(chip); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, offset); if (WARN_ON(base == NULL)) return; value = readl(base + TEGRA186_GPIO_OUTPUT_VALUE); if (level == 0) value &= ~TEGRA186_GPIO_OUTPUT_VALUE_HIGH; else value |= TEGRA186_GPIO_OUTPUT_VALUE_HIGH; writel(value, base + TEGRA186_GPIO_OUTPUT_VALUE); } static int tegra186_gpio_of_xlate(struct gpio_chip *chip, const struct of_phandle_args *spec, u32 *flags) { struct tegra_gpio *gpio = gpiochip_get_data(chip); unsigned int port, pin, i, offset = 0; if (WARN_ON(chip->of_gpio_n_cells < 2)) return -EINVAL; if (WARN_ON(spec->args_count < chip->of_gpio_n_cells)) return -EINVAL; port = spec->args[0] / 8; pin = spec->args[0] % 8; if (port >= gpio->soc->num_ports) { dev_err(chip->parent, "invalid port number: %u\n", port); return -EINVAL; } for (i = 0; i < port; i++) offset += gpio->soc->ports[i].pins; if (flags) *flags = spec->args[1]; return offset + pin; } static void tegra186_irq_ack(struct irq_data *data) { struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data); void __iomem *base; base = tegra186_gpio_get_base(gpio, data->hwirq); if (WARN_ON(base == NULL)) return; writel(1, base + TEGRA186_GPIO_INTERRUPT_CLEAR); } static void tegra186_irq_mask(struct irq_data *data) { struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, data->hwirq); if (WARN_ON(base == NULL)) return; value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); value &= ~TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT; writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); } static void tegra186_irq_unmask(struct irq_data *data) { struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, data->hwirq); if (WARN_ON(base == NULL)) return; value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); value |= TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT; writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); } static int tegra186_irq_set_type(struct irq_data *data, unsigned int type) { struct tegra_gpio *gpio = irq_data_get_irq_chip_data(data); void __iomem *base; u32 value; base = tegra186_gpio_get_base(gpio, data->hwirq); if (WARN_ON(base == NULL)) return -ENODEV; value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG); value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK; value &= ~TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; switch (type & IRQ_TYPE_SENSE_MASK) { case IRQ_TYPE_NONE: break; case IRQ_TYPE_EDGE_RISING: value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; break; case IRQ_TYPE_EDGE_FALLING: value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_SINGLE_EDGE; break; case IRQ_TYPE_EDGE_BOTH: value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE; break; case IRQ_TYPE_LEVEL_HIGH: value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL; value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL; break; case IRQ_TYPE_LEVEL_LOW: value |= TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_LEVEL; break; default: return -EINVAL; } writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG); if ((type & IRQ_TYPE_EDGE_BOTH) == 0) irq_set_handler_locked(data, handle_level_irq); else irq_set_handler_locked(data, handle_edge_irq); return 0; } static void tegra186_gpio_irq(struct irq_desc *desc) { struct tegra_gpio *gpio = irq_desc_get_handler_data(desc); struct irq_domain *domain = gpio->gpio.irq.domain; struct irq_chip *chip = irq_desc_get_chip(desc); unsigned int parent = irq_desc_get_irq(desc); unsigned int i, offset = 0; chained_irq_enter(chip, desc); for (i = 0; i < gpio->soc->num_ports; i++) { const struct tegra_gpio_port *port = &gpio->soc->ports[i]; void __iomem *base = gpio->base + port->offset; unsigned int pin, irq; unsigned long value; /* skip ports that are not associated with this controller */ if (parent != gpio->irq[port->irq]) goto skip; value = readl(base + TEGRA186_GPIO_INTERRUPT_STATUS(1)); for_each_set_bit(pin, &value, port->pins) { irq = irq_find_mapping(domain, offset + pin); if (WARN_ON(irq == 0)) continue; generic_handle_irq(irq); } skip: offset += port->pins; } chained_irq_exit(chip, desc); } static int tegra186_gpio_irq_domain_xlate(struct irq_domain *domain, struct device_node *np, const u32 *spec, unsigned int size, unsigned long *hwirq, unsigned int *type) { struct tegra_gpio *gpio = gpiochip_get_data(domain->host_data); unsigned int port, pin, i, offset = 0; if (size < 2) return -EINVAL; port = spec[0] / 8; pin = spec[0] % 8; if (port >= gpio->soc->num_ports) { dev_err(gpio->gpio.parent, "invalid port number: %u\n", port); return -EINVAL; } for (i = 0; i < port; i++) offset += gpio->soc->ports[i].pins; *type = spec[1] & IRQ_TYPE_SENSE_MASK; *hwirq = offset + pin; return 0; } static const struct irq_domain_ops tegra186_gpio_irq_domain_ops = { .map = gpiochip_irq_map, .unmap = gpiochip_irq_unmap, .xlate = tegra186_gpio_irq_domain_xlate, }; static int tegra186_gpio_probe(struct platform_device *pdev) { unsigned int i, j, offset; struct gpio_irq_chip *irq; struct tegra_gpio *gpio; struct resource *res; char **names; int err; gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); if (!gpio) return -ENOMEM; gpio->soc = of_device_get_match_data(&pdev->dev); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gpio"); gpio->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(gpio->base)) return PTR_ERR(gpio->base); err = platform_irq_count(pdev); if (err < 0) return err; gpio->num_irq = err; gpio->irq = devm_kcalloc(&pdev->dev, gpio->num_irq, sizeof(*gpio->irq), GFP_KERNEL); if (!gpio->irq) return -ENOMEM; for (i = 0; i < gpio->num_irq; i++) { err = platform_get_irq(pdev, i); if (err < 0) return err; gpio->irq[i] = err; } gpio->gpio.label = gpio->soc->name; gpio->gpio.parent = &pdev->dev; gpio->gpio.get_direction = tegra186_gpio_get_direction; gpio->gpio.direction_input = tegra186_gpio_direction_input; gpio->gpio.direction_output = tegra186_gpio_direction_output; gpio->gpio.get = tegra186_gpio_get, gpio->gpio.set = tegra186_gpio_set; gpio->gpio.base = -1; for (i = 0; i < gpio->soc->num_ports; i++) gpio->gpio.ngpio += gpio->soc->ports[i].pins; names = devm_kcalloc(gpio->gpio.parent, gpio->gpio.ngpio, sizeof(*names), GFP_KERNEL); if (!names) return -ENOMEM; for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) { const struct tegra_gpio_port *port = &gpio->soc->ports[i]; char *name; for (j = 0; j < port->pins; j++) { name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL, "P%s.%02x", port->name, j); if (!name) return -ENOMEM; names[offset + j] = name; } offset += port->pins; } gpio->gpio.names = (const char * const *)names; gpio->gpio.of_node = pdev->dev.of_node; gpio->gpio.of_gpio_n_cells = 2; gpio->gpio.of_xlate = tegra186_gpio_of_xlate; gpio->intc.name = pdev->dev.of_node->name; gpio->intc.irq_ack = tegra186_irq_ack; gpio->intc.irq_mask = tegra186_irq_mask; gpio->intc.irq_unmask = tegra186_irq_unmask; gpio->intc.irq_set_type = tegra186_irq_set_type; irq = &gpio->gpio.irq; irq->chip = &gpio->intc; irq->domain_ops = &tegra186_gpio_irq_domain_ops; irq->handler = handle_simple_irq; irq->default_type = IRQ_TYPE_NONE; irq->parent_handler = tegra186_gpio_irq; irq->parent_handler_data = gpio; irq->num_parents = gpio->num_irq; irq->parents = gpio->irq; irq->map = devm_kcalloc(&pdev->dev, gpio->gpio.ngpio, sizeof(*irq->map), GFP_KERNEL); if (!irq->map) return -ENOMEM; for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) { const struct tegra_gpio_port *port = &gpio->soc->ports[i]; for (j = 0; j < port->pins; j++) irq->map[offset + j] = irq->parents[port->irq]; offset += port->pins; } platform_set_drvdata(pdev, gpio); err = devm_gpiochip_add_data(&pdev->dev, &gpio->gpio, gpio); if (err < 0) return err; return 0; } static int tegra186_gpio_remove(struct platform_device *pdev) { return 0; } #define TEGRA186_MAIN_GPIO_PORT(port, base, count, controller) \ [TEGRA186_MAIN_GPIO_PORT_##port] = { \ .name = #port, \ .offset = base, \ .pins = count, \ .irq = controller, \ } static const struct tegra_gpio_port tegra186_main_ports[] = { TEGRA186_MAIN_GPIO_PORT( A, 0x2000, 7, 2), TEGRA186_MAIN_GPIO_PORT( B, 0x3000, 7, 3), TEGRA186_MAIN_GPIO_PORT( C, 0x3200, 7, 3), TEGRA186_MAIN_GPIO_PORT( D, 0x3400, 6, 3), TEGRA186_MAIN_GPIO_PORT( E, 0x2200, 8, 2), TEGRA186_MAIN_GPIO_PORT( F, 0x2400, 6, 2), TEGRA186_MAIN_GPIO_PORT( G, 0x4200, 6, 4), TEGRA186_MAIN_GPIO_PORT( H, 0x1000, 7, 1), TEGRA186_MAIN_GPIO_PORT( I, 0x0800, 8, 0), TEGRA186_MAIN_GPIO_PORT( J, 0x5000, 8, 5), TEGRA186_MAIN_GPIO_PORT( K, 0x5200, 1, 5), TEGRA186_MAIN_GPIO_PORT( L, 0x1200, 8, 1), TEGRA186_MAIN_GPIO_PORT( M, 0x5600, 6, 5), TEGRA186_MAIN_GPIO_PORT( N, 0x0000, 7, 0), TEGRA186_MAIN_GPIO_PORT( O, 0x0200, 4, 0), TEGRA186_MAIN_GPIO_PORT( P, 0x4000, 7, 4), TEGRA186_MAIN_GPIO_PORT( Q, 0x0400, 6, 0), TEGRA186_MAIN_GPIO_PORT( R, 0x0a00, 6, 0), TEGRA186_MAIN_GPIO_PORT( T, 0x0600, 4, 0), TEGRA186_MAIN_GPIO_PORT( X, 0x1400, 8, 1), TEGRA186_MAIN_GPIO_PORT( Y, 0x1600, 7, 1), TEGRA186_MAIN_GPIO_PORT(BB, 0x2600, 2, 2), TEGRA186_MAIN_GPIO_PORT(CC, 0x5400, 4, 5), }; static const struct tegra_gpio_soc tegra186_main_soc = { .num_ports = ARRAY_SIZE(tegra186_main_ports), .ports = tegra186_main_ports, .name = "tegra186-gpio", }; #define TEGRA186_AON_GPIO_PORT(port, base, count, controller) \ [TEGRA186_AON_GPIO_PORT_##port] = { \ .name = #port, \ .offset = base, \ .pins = count, \ .irq = controller, \ } static const struct tegra_gpio_port tegra186_aon_ports[] = { TEGRA186_AON_GPIO_PORT( S, 0x0200, 5, 0), TEGRA186_AON_GPIO_PORT( U, 0x0400, 6, 0), TEGRA186_AON_GPIO_PORT( V, 0x0800, 8, 0), TEGRA186_AON_GPIO_PORT( W, 0x0a00, 8, 0), TEGRA186_AON_GPIO_PORT( Z, 0x0e00, 4, 0), TEGRA186_AON_GPIO_PORT(AA, 0x0c00, 8, 0), TEGRA186_AON_GPIO_PORT(EE, 0x0600, 3, 0), TEGRA186_AON_GPIO_PORT(FF, 0x0000, 5, 0), }; static const struct tegra_gpio_soc tegra186_aon_soc = { .num_ports = ARRAY_SIZE(tegra186_aon_ports), .ports = tegra186_aon_ports, .name = "tegra186-gpio-aon", }; #define TEGRA194_MAIN_GPIO_PORT(port, base, count, controller) \ [TEGRA194_MAIN_GPIO_PORT_##port] = { \ .name = #port, \ .offset = base, \ .pins = count, \ .irq = controller, \ } static const struct tegra_gpio_port tegra194_main_ports[] = { TEGRA194_MAIN_GPIO_PORT( A, 0x1400, 8, 1), TEGRA194_MAIN_GPIO_PORT( B, 0x4e00, 2, 4), TEGRA194_MAIN_GPIO_PORT( C, 0x4600, 8, 4), TEGRA194_MAIN_GPIO_PORT( D, 0x4800, 4, 4), TEGRA194_MAIN_GPIO_PORT( E, 0x4a00, 8, 4), TEGRA194_MAIN_GPIO_PORT( F, 0x4c00, 6, 4), TEGRA194_MAIN_GPIO_PORT( G, 0x4000, 8, 4), TEGRA194_MAIN_GPIO_PORT( H, 0x4200, 8, 4), TEGRA194_MAIN_GPIO_PORT( I, 0x4400, 5, 4), TEGRA194_MAIN_GPIO_PORT( J, 0x5200, 6, 5), TEGRA194_MAIN_GPIO_PORT( K, 0x3000, 8, 3), TEGRA194_MAIN_GPIO_PORT( L, 0x3200, 4, 3), TEGRA194_MAIN_GPIO_PORT( M, 0x2600, 8, 2), TEGRA194_MAIN_GPIO_PORT( N, 0x2800, 3, 2), TEGRA194_MAIN_GPIO_PORT( O, 0x5000, 6, 5), TEGRA194_MAIN_GPIO_PORT( P, 0x2a00, 8, 2), TEGRA194_MAIN_GPIO_PORT( Q, 0x2c00, 8, 2), TEGRA194_MAIN_GPIO_PORT( R, 0x2e00, 6, 2), TEGRA194_MAIN_GPIO_PORT( S, 0x3600, 8, 3), TEGRA194_MAIN_GPIO_PORT( T, 0x3800, 8, 3), TEGRA194_MAIN_GPIO_PORT( U, 0x3a00, 1, 3), TEGRA194_MAIN_GPIO_PORT( V, 0x1000, 8, 1), TEGRA194_MAIN_GPIO_PORT( W, 0x1200, 2, 1), TEGRA194_MAIN_GPIO_PORT( X, 0x2000, 8, 2), TEGRA194_MAIN_GPIO_PORT( Y, 0x2200, 8, 2), TEGRA194_MAIN_GPIO_PORT( Z, 0x2400, 8, 2), TEGRA194_MAIN_GPIO_PORT(FF, 0x3400, 2, 3), TEGRA194_MAIN_GPIO_PORT(GG, 0x0000, 2, 0) }; static const struct tegra_gpio_soc tegra194_main_soc = { .num_ports = ARRAY_SIZE(tegra194_main_ports), .ports = tegra194_main_ports, .name = "tegra194-gpio", }; #define TEGRA194_AON_GPIO_PORT(port, base, count, controller) \ [TEGRA194_AON_GPIO_PORT_##port] = { \ .name = #port, \ .offset = base, \ .pins = count, \ .irq = controller, \ } static const struct tegra_gpio_port tegra194_aon_ports[] = { TEGRA194_AON_GPIO_PORT(AA, 0x0600, 8, 0), TEGRA194_AON_GPIO_PORT(BB, 0x0800, 4, 0), TEGRA194_AON_GPIO_PORT(CC, 0x0200, 8, 0), TEGRA194_AON_GPIO_PORT(DD, 0x0400, 3, 0), TEGRA194_AON_GPIO_PORT(EE, 0x0000, 7, 0) }; static const struct tegra_gpio_soc tegra194_aon_soc = { .num_ports = ARRAY_SIZE(tegra194_aon_ports), .ports = tegra194_aon_ports, .name = "tegra194-gpio-aon", }; static const struct of_device_id tegra186_gpio_of_match[] = { { .compatible = "nvidia,tegra186-gpio", .data = &tegra186_main_soc }, { .compatible = "nvidia,tegra186-gpio-aon", .data = &tegra186_aon_soc }, { .compatible = "nvidia,tegra194-gpio", .data = &tegra194_main_soc }, { .compatible = "nvidia,tegra194-gpio-aon", .data = &tegra194_aon_soc }, { /* sentinel */ } }; static struct platform_driver tegra186_gpio_driver = { .driver = { .name = "tegra186-gpio", .of_match_table = tegra186_gpio_of_match, }, .probe = tegra186_gpio_probe, .remove = tegra186_gpio_remove, }; module_platform_driver(tegra186_gpio_driver); MODULE_DESCRIPTION("NVIDIA Tegra186 GPIO controller driver"); MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); MODULE_LICENSE("GPL v2");