linux-imx

/*

 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/

 *  Keerthy <j-keerthy@ti.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether expressed or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License version 2 for more details.

 *

 * Based on the LP873X driver

 */

​

#include <linux/gpio/driver.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

​

#include <linux/mfd/lp87565.h>

​

struct lp87565_gpio {

    struct gpio_chip chip;

    struct regmap *map;

};

​

static int lp87565_gpio_get(struct gpio_chip *chip, unsigned int offset)

{

    struct lp87565_gpio *gpio = gpiochip_get_data(chip);

    int ret, val;

​

    ret = regmap_read(gpio->map, LP87565_REG_GPIO_IN, &val);

    if (ret < 0)

        return ret;

​

    return !!(val & BIT(offset));

}

​

static void lp87565_gpio_set(struct gpio_chip *chip, unsigned int offset,

                 int value)

{

    struct lp87565_gpio *gpio = gpiochip_get_data(chip);

​

    regmap_update_bits(gpio->map, LP87565_REG_GPIO_OUT,

               BIT(offset), value ? BIT(offset) : 0);

}

​

static int lp87565_gpio_get_direction(struct gpio_chip *chip,

                      unsigned int offset)

{

    struct lp87565_gpio *gpio = gpiochip_get_data(chip);

    int ret, val;

​

    ret = regmap_read(gpio->map, LP87565_REG_GPIO_CONFIG, &val);

    if (ret < 0)

        return ret;

​

    return !(val & BIT(offset));

}

​

static int lp87565_gpio_direction_input(struct gpio_chip *chip,