linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>

 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>

 */

​

#include <linux/err.h>

#include <linux/gpio/driver.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of_irq.h>

#include <linux/platform_device.h>

#include <linux/spinlock.h>

​

#define MTK_BANK_CNT    3

#define MTK_BANK_WIDTH  32

​

#define GPIO_BANK_STRIDE    0x04

#define GPIO_REG_CTRL       0x00

#define GPIO_REG_POL        0x10

#define GPIO_REG_DATA       0x20

#define GPIO_REG_DSET       0x30

#define GPIO_REG_DCLR       0x40

#define GPIO_REG_REDGE      0x50

#define GPIO_REG_FEDGE      0x60

#define GPIO_REG_HLVL       0x70

#define GPIO_REG_LLVL       0x80

#define GPIO_REG_STAT       0x90

#define GPIO_REG_EDGE       0xA0

​

struct mtk_gc {

    struct irq_chip irq_chip;

    struct gpio_chip chip;

    spinlock_t lock;

    int bank;

    u32 rising;

    u32 falling;

    u32 hlevel;

    u32 llevel;

};

​

/**

 * struct mtk - state container for

 * data of the platform driver. It is 3

 * separate gpio-chip each one with its

 * own irq_chip.

 * @dev: device instance

 * @base: memory base address

 * @gpio_irq: irq number from the device tree

 * @gc_map: array of the gpio chips

 */

struct mtk {

    struct device *dev;

    void __iomem *base;

    int gpio_irq;

    struct mtk_gc gc_map[MTK_BANK_CNT];

};

​

static inline struct mtk_gc *

to_mediatek_gpio(struct gpio_chip *chip)

{

    return container_of(chip, struct mtk_gc, chip);