linux-imx

/*

 * Copyright (c) 2016-2017 NVIDIA Corporation

 *

 * Author: Thierry Reding <treding@nvidia.com>

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 */

​

#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)