linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * gpiolib support for Wolfson WM835x PMICs

 *

 * Copyright 2009 Wolfson Microelectronics PLC.

 *

 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>

 *

 */

​

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/gpio/driver.h>

#include <linux/mfd/core.h>

#include <linux/platform_device.h>

#include <linux/seq_file.h>

​

#include <linux/mfd/wm8350/core.h>

#include <linux/mfd/wm8350/gpio.h>

​

struct wm8350_gpio_data {

    struct wm8350 *wm8350;

    struct gpio_chip gpio_chip;

};

​

static int wm8350_gpio_direction_in(struct gpio_chip *chip, unsigned offset)

{

    struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);

    struct wm8350 *wm8350 = wm8350_gpio->wm8350;

​

    return wm8350_set_bits(wm8350, WM8350_GPIO_CONFIGURATION_I_O,

                   1 << offset);

}

​

static int wm8350_gpio_get(struct gpio_chip *chip, unsigned offset)

{

    struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);

    struct wm8350 *wm8350 = wm8350_gpio->wm8350;

    int ret;

​

    ret = wm8350_reg_read(wm8350, WM8350_GPIO_LEVEL);

    if (ret < 0)

        return ret;

​

    if (ret & (1 << offset))

        return 1;

    else

        return 0;

}

​

static void wm8350_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

{

    struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);

    struct wm8350 *wm8350 = wm8350_gpio->wm8350;

​

    if (value)

        wm8350_set_bits(wm8350, WM8350_GPIO_LEVEL, 1 << offset);

    else

        wm8350_clear_bits(wm8350, WM8350_GPIO_LEVEL, 1 << offset);

}

​

static int wm8350_gpio_direction_out(struct gpio_chip *chip,